JP2002170593A - Enclosed type lead storage battery - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain an enclosed type lead storage battery, which barely suffers stratification and has a mono-block bath with a superior life characteristic. SOLUTION: A bath 2 having an opening 1 comprises a plurality of cell chambers 5 forming the mono-block bath 6, which is partitioned by a partition 3 parallel to the upper surface 2a and lower surface 2b of the bath 2 and by vertical partitions 4 arranged on the both sides across the partition 3 and parallel to the both side surfaces 2c, 2d which are the both sides of the opening 1. Each cell chamber houses rectangular plates 7, 8 in the way that the long sides of the rectangular are parallel to and the short sides are vertical to the ground. Each plate group 10 is kept bathed in a electrolyte solution and the opening 1 of the mono-block bath 6 is closed with a capping plate in a solution- tight manner.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sealed lead-acid battery having a monoblock battery case, and more particularly to a sealed lead-acid battery suitably applied to a 36V sealed lead-acid battery having an 18-cell monoblock battery case. is there.

[0002]

2. Description of the Related Art At present, a 12V liquid lead storage battery is used for a vehicle at the time of starting the vehicle and as a power source for lamps. However, in recent years, from the viewpoint of environmental problems, 12
A system in which a power supply comprising a higher-voltage 36V lead storage battery in addition to a V lead storage battery is mounted on an automobile has been proposed, and development is being promoted in Europe and the like. This system aims to reduce fuel consumption by using a 36V automotive power supply to reduce engine load, idle stop, start, charge regenerative energy during braking, etc. to reduce carbon dioxide emissions. . From the user side, a request for superior maintenance-free performance for a 36V automotive power supply has been issued, so it is considered that a sealed lead-acid battery is more suitable for this application than a liquid type.

[0003] Sealed lead-acid batteries are used in a wide variety of applications, for example, as power supplies for various portable electronic devices, electric vehicles, telephone exchanges, and computer backups. Due to its excellent maintenance-free properties, applications and usage tend to increase in the future.

[0004] The conventional monoblock battery case of a 12 V sealed lead-acid battery has an opening on the upper surface, and has a structure in which six cell chambers are provided in one row by partition walls perpendicular to the upper surface and the lower surface. Was. In each of the cell chambers, a group of electrode plates was accommodated such that a rectangular electrode plate had a short side horizontally and a long side vertically. For this reason, each electrode plate is in the height direction (vertical direction).
I had to be long.

[0005]

However, when the electrodes constituting the electrode group are elongated in the height direction (vertical direction),
In the separator impregnated with the electrolytic solution in the electrode group, a stratification phenomenon of the electrolytic solution occurs, which causes an imbalance in performance above and below the same electrode plate, thereby causing a problem of early deterioration of battery life. Was.

Attempts have been made to improve the liquid retention performance by improving the material and processing method of the separator, but there is naturally a limit to the suction capacity of the separator in the height direction, and the stratification phenomenon has not been improved.

The monoblock battery case used for the 36 V sealed lead-acid battery has a configuration in which 18 cell chambers are formed and divided. As compared with the case where the cell room type monoblock battery case is used, there is a problem in that the number of cells increases, the variation among the cells increases, and the life characteristics easily deteriorate early. Prevention of early deterioration of life characteristics due to stratification
It is considered indispensable for use in a 6V automotive power supply.

An object of the present invention is to provide a sealed lead-acid battery having a monoblock battery case which is less likely to cause stratification and has excellent life characteristics.

It is an object of the present invention to provide a sealed lead-acid battery of 36 V having a monoblock battery case which is hardly stratified and has excellent life characteristics.

[0010]

In a sealed lead-acid battery according to the present invention, the inside of a battery case having an opening on the side is divided into a plurality of cell chambers by vertical partitions parallel to the sides on both sides of the opening. A monoblock battery case is constructed, and a rectangular electrode plate is accommodated in each cell chamber, with the long side thereof being set horizontally and the short side being set vertically, and the electrode group is stored in each electrode group. The opening of the monoblock battery case is liquid-tightly closed by a lid plate.

Further, in the sealed lead-acid battery according to the present invention, the inside of the battery case having an opening on the side surface has a partition wall in a horizontal direction parallel to the upper surface and the lower surface of the battery case, and an opening on both sides of the partition wall. A plurality of cell compartments are partitioned by vertical partition walls parallel to both side surfaces to form a monoblock battery case.In each cell compartment, a rectangular electrode plate is set with its long side horizontal and its short side vertical. Each of the electrode groups is housed therein, an electrolyte is held in each of the electrode groups, and an opening of the monoblock battery case is liquid-tightly closed by a lid plate.

As described above, the rectangular electrode plates are accommodated in each cell chamber of the monoblock battery case which is opened on the side surface, with the long sides thereof being horizontal and the short sides being vertical, respectively. The height of the electrode plate group is reduced to half or less of that of the conventional one in which the long side of the plate is vertical, the stratification phenomenon of the electrolyte is less likely to occur, and a monoblock battery case with excellent life characteristics is provided. A sealed lead-acid battery can be obtained. In particular, when the inside of the battery case is vertically divided by horizontal partition walls parallel to the upper surface and the lower surface, and a plurality of cell rooms are formed on both sides thereof, it is possible to obtain the required number of cell rooms without increasing the installation area. it can.

Further, in the sealed lead-acid battery according to the present invention, the inside of the battery case having an opening on the side surface has a horizontal partition wall parallel to the upper surface and the lower surface of the battery case, and an opening on both sides of the partition wall. A monoblock battery case is formed by dividing into 18 cell chambers of 2.times.9 rows by vertical partition walls parallel to both side surfaces, and a rectangular electrode plate is provided in each cell chamber with its long side oriented sideways. The electrode groups are respectively housed with the short sides in the vertical direction, the electrolyte is held in each electrode group, and the opening of the monoblock battery case is liquid-tightly closed by a lid plate.

According to such a configuration, the inside of the battery case having the opening on the side surface is provided with the horizontal partition parallel to the upper surface and the lower surface of the battery case, and the side wall of the opening on both sides of the partition. In each cell chamber of the monoblock battery case partitioned into 18 cell chambers of 2 × 9 rows by parallel vertical partition walls, a rectangular electrode plate is formed with its long side oriented horizontally and its short side oriented vertically. Since each electrode group is housed, the height of the electrode group is reduced to less than half compared to the conventional electrode with the long sides of the electrode plates vertically, and the electrolyte stratification occurs. A sealed lead-acid battery of 36 V having a monoblock battery case which is difficult and has excellent life characteristics can be obtained. Further, when the inside of the battery case is vertically divided by horizontal partition walls parallel to the upper surface and the lower surface, and a plurality of cell chambers are formed on both sides thereof, 18 cell chambers can be obtained without increasing the installation area. .

Further, in the sealed lead-acid battery according to the present invention, the inside of the battery case having an opening on the side surface has a horizontal partition wall parallel to the upper surface and the lower surface of the battery case, and an opening on both sides of the partition wall. A monoblock battery case is formed by partitioning into 18 cell chambers of 3 × 6 rows by vertical partition walls parallel to both side surfaces, and a rectangular electrode plate is provided in each cell chamber with its long side oriented sideways. The electrode groups are respectively housed with the short sides in the vertical direction, the electrolyte is held in each electrode group, and the opening of the monoblock battery case is liquid-tightly closed by a lid plate.

According to such a configuration, the inside of the battery case having the opening on the side surface is provided with the horizontal partition parallel to the upper surface and the lower surface of the battery case, and the side wall of the opening on both sides of the partition. In each cell chamber of the monoblock battery case, which is divided into 18 cell chambers of 3 × 6 rows by parallel vertical partition walls, a rectangular electrode plate is formed with its long side in the horizontal direction and its short side in the vertical direction. Since the electrode groups are respectively housed, the height of the electrode group is reduced to half or less as compared with the conventional one in which the long sides of the electrode plates are vertically oriented. 36V with a monoblock battery case with less stratification and excellent life characteristics
Can be obtained. Further, when the inside of the battery case is vertically divided by horizontal partition walls parallel to the upper surface and the lower surface, and a plurality of cell chambers are formed on both sides thereof, 18 cell chambers can be obtained without increasing the installation area. .

Further, the sealed lead-acid battery according to the present invention is characterized in that a terminal of an electrode group is provided on an upper part of a battery case or a cover plate.

According to such a sealed lead-acid battery, even if the opening of the battery case is directed sideways, the terminal is present at the top, so that it can be used in the same manner as a normal lead-acid battery.

[0019]

1 and 2 show an embodiment of a sealed lead-acid battery according to the present invention. FIG. 1 is a perspective view of the sealed lead-acid battery of this embodiment, and FIG. It is a front view showing the state where the lid board was removed in the sealed type lead storage battery of this example.

In the sealed lead-acid battery of this embodiment, the inside of the battery case 2 having the opening 1 on the side surface is formed by the upper surface 2a and the lower surface 2b of the battery case 2.
And a vertical partition 4 parallel to both sides 2c and 2d of the opening 1 on both sides of the partition 3
Thus, a monoblock battery case 6 is formed by dividing into 18 cell chambers 5 in 2 × 9 rows. The battery case 2 is formed of a non-polar polymer such as polypropylene or polyethylene. In each cell chamber 5, a plurality of positive electrode plates 7 and negative electrode plates 8 are alternately stacked with a separator 9 interposed therebetween. Each is stored vertically. The positive electrode plate 7 and the negative electrode plate 8 of the electrode plate group 10 are configured by applying a lead paste to a grid of a lead alloy. As the separator 9, a mat-like electrolyte holding member made of glass fiber such as a glass retainer mat is used. Each ear of each positive electrode plate 7 is connected by a positive electrode strap 11, and each ear of each negative electrode plate 8 is connected by a negative electrode strap 12. Each electrode plate group 10 holds sulfuric acid as an electrolytic solution.

Each electrode group 10 is connected in series by an inter-cell connector 13. The lower ends of the terminals 14a and 14b are connected to the inter-cell connector 13 existing at both ends in a serial connection by soldering or the like. With the terminals 14a and 14b passed through the holes provided at the upper end from the inner surface of the cover plate 15, the cover plate 15 is applied to the opening 1 of the monoblock battery case 6, and bonded by heat fusion or an adhesive. Closed liquid tight.
Also, the lead-out portions of the terminals 14a and 14b from the cover plate 15 are sealed in a liquid-tight manner by heat fusion or bonding with an adhesive. The cover plate 15 is also formed of a nonpolar polymer such as polypropylene or polyethylene.

The production of such a sealed lead-acid battery is performed, for example, as follows. Battery case 2 with opening 1 facing upward
And the rectangular electrode plates 7, 8 are arranged in each cell chamber 5 such that the long sides thereof are horizontal and the short sides are vertical.
0 are respectively inserted, the electrode plate group 10 is connected in series by the inter-cell connector 13, and the terminals 14 a and 14 b are connected to the inter-cell connector 13 existing at both ends in this series connection.
a and 14b are passed through the hole provided at the upper end from the inner surface of the cover plate 15, and the cover plate 15 is connected to the opening 1 of the monoblock battery case 6.
Then, the terminals 14a and 14b from the cover plate 15 are sealed in a liquid-tight manner by heat fusion or bonding with an adhesive. In this state, the liquid is injected into each cell chamber 5 through a hole (not shown) provided in the cover plate 15 corresponding to each cell chamber 5, and impregnated and held in each electrode plate group 10. Each hole is closed by a safety valve (not shown). Thereafter, the battery case 2 is set so that the cover plate 15 faces the side and the upper surface 2a faces upward.

[0023]

Next, examples of the present invention and comparative examples will be described. The sealed lead-acid batteries of these examples use an 18-cell monoblock battery case 6 of D26 size.

Example 1 As a battery case, an opening is formed on one side of the side wall, the inside of which is parallel to the upper surface and the lower surface, and a plurality of partitions parallel to both side walls of the opening on both sides of the partition. 2 × 9 rows of 1
A monoblock battery case partitioned into eight cell chambers was used. In each cell chamber of the monoblock battery case, a group of electrode plates in which four positive electrode plates and five negative electrode plates are alternately laminated with a glass fiber separator interposed therebetween is used. Was housed vertically. In each electrode plate group, each positive electrode plate was connected by a positive electrode strap, and each negative electrode plate was connected by a negative electrode strap. These electrode groups were connected in series by an inter-cell connector. The opening of the monoblock battery case is heat-sealed with a cover plate in a liquid-tight manner, and sulfuric acid having a specific gravity of 1.30 is injected into each cell chamber as an electrolytic solution from each hole of the cover plate, and each hole is provided with a safety valve. The sealed lead-acid battery A of 36 V, 20 Ah was formed.

Embodiment 2 The battery case has an opening on one side surface, two partitions parallel to the upper and lower surfaces, and both sides of these partitions parallel to both side walls of the opening. 3 × 6 with multiple partitions
A sealed lead-acid battery B of 36 V, 20 Ah was prepared in the same manner as in Example 1 except that a monoblock battery case partitioned into 18 cell chambers in a row was used.

Comparative Example 1 Same as Example 1 except that the monoblock battery case used in Example 1 was arranged so that the opening was upward.
V, 20 Ah sealed lead storage battery C was prepared.

Comparative Example 2 Same as Example 2 except that the monoblock battery case used in Example 2 was arranged so that the opening was upward.
V, 20 Ah sealed lead storage battery D was prepared.

The sealed lead-acid batteries A and B of the present invention as described above.
In each of the cell chambers, each of the rectangular electrode plates of the electrode group has the long side in the horizontal direction and the short side in the vertical direction. In the sealed lead-acid batteries C and D of the comparative example, the rectangular Each electrode plate has a short side in a horizontal direction and a long side in a vertical direction.

The sealed lead-acid batteries A to A produced as described above
D was subjected to a JIS light load life test at 60 ° C.
The test conditions are: charge: 25 Amax, 14.8 V constant voltage charge: 10 minutes, discharge: 25 A, 4 minutes (constant current). 24
The battery was discharged at 230 A for 30 s for every 00 cycles, and when the battery voltage dropped below 21.6 V, it was determined that the battery life was over.

FIG. 3 shows the relationship between the number of cycles obtained by the above life test and the battery voltage at the time of discharging at 230 A for 30 s.

As is apparent from this figure, the sealed lead-acid batteries A and B of the present invention show excellent cycle characteristics, and the cycle life is 2-3 times that of the conventional sealed lead-acid batteries C and D. I found it to stretch. This is because, compared to the conventional sealed lead-acid batteries C and D, the stratification phenomenon could be suppressed, and the capacity reduction of the negative electrode could be suppressed.

The present invention will be described using an example of a monoblock battery case of a 36V sealed lead-acid battery. The inside of the battery case having an opening on the side is a vertical partition parallel to the side on both sides of the opening. The present invention can also be applied to a one-stage structure in which 18 cells are arranged in 1 × 18 rows.

[0033]

According to the sealed lead-acid battery of the present invention, a rectangular electrode plate is provided in each cell chamber of a monoblock battery case which is opened on the side, with its long side being horizontal and its short side being vertical. , Respectively, so that the height of the electrode plate group is reduced to less than ２ compared with the conventional one in which the long side of the electrode plate is vertically oriented, and the stratification phenomenon of the electrolyte is less likely to occur, and the life is shortened. A sealed lead-acid battery having a monoblock battery case with excellent characteristics can be obtained. In particular, when the inside of the battery case is vertically divided by horizontal partition walls parallel to the upper surface and the lower surface, and a plurality of cell rooms are formed on both sides thereof, it is possible to obtain the required number of cell rooms without increasing the installation area. it can.

Further, in each cell chamber of the monoblock battery case divided into 18 cell chambers of 2.times.9 rows, an electrode group having a rectangular electrode plate with its long side horizontally and its short side vertically. The height of the electrode group is reduced to half or less as compared with the conventional battery in which the long sides of the electrode plates are vertically oriented, and the stratification phenomenon of the electrolyte is reduced. It is possible to obtain a sealed lead-acid battery of 36 V having a monoblock battery case which is unlikely to occur and has excellent life characteristics. Further, when the inside of the battery case is vertically divided by horizontal partition walls parallel to the upper surface and the lower surface, and a plurality of cell chambers are formed on both sides thereof, 18 cell chambers can be obtained without increasing the installation area. .

Further, in each cell chamber of the monoblock battery case which is partitioned into 18 cell chambers of 3 × 6 rows, a rectangular electrode plate is arranged with its long side in the horizontal direction and its short side in the vertical direction. , The height of the electrode plate group is reduced to half or less as compared with a conventional battery in which the long sides of the electrode plates are vertically oriented, and the electrolytic solution is used in the horizontal electrode plates. And a 36V sealed lead-acid battery having a monoblock battery case having excellent life characteristics can be obtained. Also,
When the inside of the battery case is vertically divided by horizontal partition walls parallel to the upper surface and the lower surface, and a plurality of cell chambers are formed on both sides thereof,
18 cell chambers can be obtained without increasing the installation area.

Further, if the terminals of the electrode group are provided on the upper part of the battery case or the cover plate, even if the opening of the battery case is directed sideways, the terminals exist on the upper side. Can be used.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an example of an embodiment of a sealed lead-acid battery according to the present invention.

FIG. 2 is a front view showing a state in which a lid plate is removed from the sealed lead-acid battery of the present embodiment.

FIG. 3 is a diagram showing the relationship between the number of cycles and the battery voltage at the time of discharge obtained by a life test of each sealed lead storage battery of the present invention and each sealed lead storage battery of a comparative example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Opening part 2 Battery case 2a Upper surface 2b Lower surface 2c, 2d Side surface 3, 4 Partition wall 5 Cell room 6 Monoblock container 7 Positive electrode plate 8 Negative electrode plate 9 Separator 10 Electrode plate group 11 Positive electrode strap 12 Negative electrode strap 13 Intercellular connection body 14a , 14b terminal 15 cover plate

Claims (5)

[Claims] An inside of a battery case having an opening on a side surface is partitioned into a plurality of cell chambers by vertical partition walls parallel to the side surfaces on both sides of the opening to form a monoblock battery case. The electrode plate group is accommodated in a rectangular electrode plate with its long side horizontally and its short side vertically, an electrolyte is held in each of the electrode groups, and the opening of the monoblock battery case is A sealed lead-acid battery that is closed in a liquid-tight manner by a lid plate. 2. A battery case having an opening on a side surface, a horizontal partition parallel to an upper surface and a lower surface of the container, and a vertical partition parallel to both side surfaces of the opening on both sides of the partition. A partition is divided into a plurality of cell chambers to form a monoblock battery case, and each of the cell chambers accommodates a group of electrode plates, each having a rectangular electrode plate with its long side horizontally and its short side vertically. An electrolyte solution is held in each of the electrode groups, and the opening of the monoblock battery case is closed in a liquid-tight manner by a lid plate. 3. A battery case having an opening on a side surface thereof has a horizontal partition parallel to an upper surface and a lower surface of the battery case, and a vertical partition parallel to both sides of the opening on both sides of the partition. A monoblock battery case is constituted by partitioning into 18 cell chambers of 2 × 9 rows by the partition walls, and a rectangular electrode plate is provided in each of the cell chambers, with the long side thereof being horizontal and the short side being vertical. A sealed lead-acid battery, wherein a plate group is stored, an electrolytic solution is held in each of the electrode plate groups, and the opening of the monoblock battery case is liquid-tightly closed by a lid plate. 4. A battery case having an opening on a side surface thereof has a horizontal partition parallel to an upper surface and a lower surface of the battery container, and a vertical partition parallel to both sides of the opening on both sides of the partition. A monoblock battery case is constituted by partitioning into 18 cell chambers of 3 × 6 rows by the partition walls, and a rectangular electrode plate is provided in each of the cell chambers, with the long side thereof being horizontal and the short side being vertical. A sealed lead-acid battery, wherein a plate group is stored, an electrolytic solution is held in each of the electrode plate groups, and the opening of the monoblock battery case is liquid-tightly closed by a lid plate. 5. The sealed lead-acid battery according to claim 1, wherein a terminal of the electrode plate group is provided above the battery case or the lid plate.