JPH0341405Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a container for a storage battery for a vehicle, and more particularly, to a container for a storage battery for a vehicle suitable for circulating an electrolyte in the container.

[Conventional technology]

Generally, in lead-acid batteries, sulfuric acid produced during charging settles at the bottom of the battery case, resulting in a large concentration difference in the electrolyte between the upper and lower parts of the battery case. FIG. 2 is a graph showing changes in the specific gravity of the electrolyte in the upper and lower parts of a conventional battery case when charging and discharging are repeated. In this case, after 3 hours of discharge,
The battery shown was left for 30 minutes and then charged for 4 hours. In this way, under deep charging and discharging,
The difference in concentration of the electrolyte between the upper and lower parts of the battery case is particularly significant. This concentration difference causes problems such as a decrease in the performance of the storage battery, such as a decrease in the capacity of the storage battery, a shortened life span, and a deterioration in the charging and discharging efficiency.

By the way, when this storage battery is loaded into a vehicle,
Although the storage battery is subject to considerable vibration, the electrolyte in the battery case is blocked by the electrode plates and is not sufficiently stirred. This state is shown in FIG. As is clear from the conventional device shown in the figure, the specific gravity of the electrolyte between the upper and lower portions of the battery container does not decrease even when the vehicle vibrates, and therefore the problem arising from the concentration difference described above is not solved.

Therefore, conventionally, a storage battery has been provided with a forced circulation device such as a pump to circulate the electrolytic solution in the battery container and make the concentration of the electrolytic solution uniform.

[The problem that the idea attempts to solve]

However, in this case, the device becomes complicated, and energy is required to drive the pump, etc., resulting in problems such as an increase in cost.

This invention was devised in view of the above-mentioned conventional problems, and aims to provide a battery case that can improve the performance of a storage battery without increasing cost.

[Means to solve the problem]

Therefore, in order to solve the above problems, this invention
A main battery cell is provided with a plurality of electrode plates and holds an electrolytic solution, and a sub-chamber is formed from the main battery cell by a partition wall disposed close to the side edge of the electrode plate, and an auxiliary chamber is formed in the upper part of the partition wall. and a flow path forming means having a flow passage formed in a lower portion thereof that communicates the main battery case and the sub-chamber, and having a flow regulating means that allows inflow and discharge of electrolyte in at least one direction in at least one of the flow passages. It is characterized by having

[Effect]

As a result, the battery case according to this invention has an auxiliary chamber formed by arranging partition walls close to the side edges of a plurality of electrode plates arranged in the main battery case, and a subchamber formed by arranging partition walls close to the side edges of a plurality of electrode plates arranged in the main battery case, and A flow path forming means is formed of a flow path that communicates the main battery case and the sub-chamber, and a flow regulating means that allows the electrolyte to flow in and out of at least one of the flow paths in only one direction. When such a battery case is mounted on a vehicle, the direction in which the vibration or acceleration of the vehicle is generated is the same as the width direction of the electrode plate.

As a result, when vibration or acceleration of the vehicle is applied to the battery tank, the electrolyte moves, and the electrolyte is given directionality by the flow regulating means that allows inflow and discharge of the electrolyte in only one direction. Therefore, the electrolytic solution is circulated within the container so that the concentration of the electrolytic solution inside the container becomes uniform.

〔Example〕

Hereinafter, embodiments of this invention will be described with reference to the drawings.

FIG. 1 is a sectional view showing an embodiment of the battery case according to this invention.

The battery case 1 is divided into a main battery case 5 and a sub-chamber 7 by a partition wall 3 extending in the vertical direction of the battery case 1 . The main battery tank 5 is provided with a plurality of electrode plates 9 and is filled with an electrolytic solution 11 so that all of the electrode plates 9 are immersed. Moreover, electrode terminals 13 are provided on the upper part of the main battery case 5 and are connected to the electrode plates 9, respectively.

On the other hand, the inside of the auxiliary chamber 7 is in a hollow state without obstacles such as the electrode plate 9. The partition wall 3 forming the auxiliary chamber 7 has an inlet 15 at its upper part as a flow path communicating with the main battery case 5, and an inlet port 15 at its lower part as a flow path communicating with the main power case 5. Exit 1
7 are formed respectively. In the inlet 15,
An on-off valve 19 as a flow regulating means is provided,
Only the electrolytic solution 11 is allowed to flow from the main battery tank 5 to the sub chamber 7. Further, an on-off valve 21 as a flow regulating means is also provided at the outflow port 17, and only allows the electrolytic solution 11 to flow out from the auxiliary chamber 7 to the main battery cell 5. By the above-mentioned partition wall 3 and on-off valves 19 and 21,
The channel forming means of the present invention is formed. In addition, when mounting such a battery case 1 on a vehicle, assuming that the directions of vibration or acceleration of the vehicle are a and b,
As shown in the figure, the width direction of the electrode plate 9 is also set to be in the directions a and b.

Next, the effect will be explained.

When the battery container 1 is vibrated or acceleration is applied to the battery container 1, and the electrolyte 11 moves in the direction of arrow a in the figure, the on-off valve 19 is opened by the fluid pressure, and the electrolyte 11 is It flows from the battery case 5 into the subchamber 7. At this time, since the on-off valve 21 is closed, the electrolytic solution 11 hardly flows into the subchamber 7 via this on-off valve 21.

Next, the electrolytic solution 11 is
When moves in the direction of arrow b in the figure,
The on-off valve 19 is closed by the hydraulic pressure, and the on-off valve 21 is closed.
only is opened, and the electrolytic solution 11 flows out from the auxiliary chamber 7 into the main battery case 5. At this time, since the on-off valve 19 is closed, the electrolyte 11 is passed through the on-off valve 19.
will not leak into the main battery case 5.

Therefore, due to vehicle vibration or acceleration, the electrolytic solution 11 circulates between the main battery case 5 and the auxiliary chamber 7 as shown by the small arrow in the figure, and as a result, the electrolyte 11 circulates between the main battery case 5 and the sub chamber 7
The concentration of the electrolytic solution 11 inside becomes uniform. This state is shown in FIG. As is clear from the figure of this invention, the electrolyte 1 in the upper and lower parts of the battery container 1
The difference in specific gravity of 1 becomes smaller depending on the vibration of the vehicle.

As described above, the electrolyte 1 in the main battery case 5 is added to the battery case 1.
By providing the auxiliary chamber 7 that allows the electrolyte 11 to flow in and out, the electrolyte 11 circulates through the auxiliary chamber 7 due to vibrations of the vehicle, etc., so that the capacity and capacity of the storage battery can be increased with a simple structure and without increasing costs. It is possible to improve the performance of the storage battery, such as improving the charging and discharging efficiency and further extending the life.

FIGS. 4 to 7 are sectional views showing other embodiments of the battery case according to the present invention, and the same parts as those in the above embodiments are given the same reference numerals, and a description thereof will be omitted.

In the battery case 1 shown in FIG. 4, the upper part of the partition wall 3 is bent to have an L-shaped cross section toward the main battery case 5 side, and a partition part 31 is formed that protrudes above the liquid level of the electrolytic solution 11. The upper edge of this partition 31 forms an inlet 33 as a flow path. Therefore,
Only when the battery case 1 vibrates or the like, the electrolytic solution 11 flows into the auxiliary chamber 7 through the inlet 33 across the partition 31. When the electrolytic solution 11 moves in the opposite direction, the barrier part 31 acts as a weir, so that the electrolytic solution 11 is not flowed out from the inlet 33 but is provided at the outlet 17 serving as a lower flow path. It flows out into the main battery case 5 through the on-off valve 21.

In the case of this embodiment, the restricting portion 31 and the on-off valve 21 constitute a flow regulating means.

In the container 1 shown in FIG. 5, the inlet 41 is similar to that shown in FIG. 4, but the outlet is different. That is, the lower edge of the partition wall 3 does not reach the lower surface of the battery case 1, and this lower edge forms an outlet 43 as a flow path, and furthermore, this outlet 43 has no valve. Therefore, due to vibration etc., electrolyte 1
1 moves in the direction of the auxiliary chamber 7, the electrolyte 11 flows into the auxiliary chamber 7 from the inlet 41 and the outlet 43, and when the electrolyte 11 further moves in the opposite direction, the inlet 41 flows into the dam. Electrolyte 1 acts as
1 flows into the main battery case 5 only from the outlet 43.

In this embodiment, the flow regulating means of the present invention is provided only corresponding to the inlet 41 which is the upper flow path.

In the battery case 1 shown in FIG.
1 and a liquid reservoir 53. pipe 5
1 extends in the vertical direction of the battery case 1, its lower part is bent toward the electrode plate 9, and its tip is located below the electrode plate 9. Also, pipe 51
A liquid reservoir 53 is provided at the upper end, and a side wall 55 of this liquid reservoir 53 has an L-shaped cross section similar to the partition shown in FIGS. It is formed to protrude. Therefore,
Due to the vibration of the battery container 1, the electrolytic solution 11 flows over the side wall 55 into the reservoir 53, and when the electrolytic solution 11 moves in the opposite direction, the side wall 55 acts as a dam, so that the electrolytic solution 11 flows into the reservoir 53. Pipe 5 from liquid reservoir 53
1 and reaches the lower part of the electrode plate 9.

In this embodiment, the pipe 51 and the liquid reservoir 5
3 constitutes the partition wall of the present invention, and the side wall 55 constitutes a flow regulating means provided only in the upper part of the flow passage.

In the battery case 1 shown in FIG. 7, the partition wall 3 is similar to that of the first embodiment shown in FIG. 1, but the position of the inlet and outlet is different. That is, an outlet 61 as a flow path is provided in the upper part of the partition wall 3, and this outlet 6
1 is equipped with an on-off valve 63 as a flow regulating means that only allows outflow from the auxiliary chamber 7 to the main battery case 5. Further, an inlet 65 as a flow path is provided at the lower part of the partition wall 3, and this inlet 65 has an on-off valve 67 as a flow regulating means that only allows inflow from the main battery case 5 to the auxiliary chamber 7. is installed. Therefore, the battery container 1 vibrates and the electrolyte 11
When the electrolyte 11 moves to the side of the auxiliary chamber 7, the electrolyte 11 flows into the auxiliary chamber 7 only from the lower inlet 65, and when the electrolyte 11 moves to the side of the main battery cell 5, the electrolyte 11 flows into the auxiliary chamber 7 only from the inlet 65 at the bottom. The circulation of the electrolytic solution 11 is opposite to that in other embodiments in which the electrolytic solution 11 flows out of the subchamber 7 only through the outlet 61.

In each of the embodiments shown in FIGS. 4 to 7, the same effects as in the first embodiment can be obtained.

[Effect of idea]

As explained above, according to the battery case according to this invention, a subchamber is provided in the battery case, and the electrolyte inside the main battery case is circulated through this subchamber, thereby reducing costs. This has the effect of improving the performance of the storage battery without increasing the performance.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view showing an embodiment of the battery case according to this invention, Fig. 2 is a graph showing changes in the specific gravity of the electrolyte at the upper and lower parts of a conventional battery case when charging and discharging are repeated, and Fig. 3 The figure is a graph showing the change in the specific gravity of the electrolyte due to vibration of the battery case according to the same embodiment and the conventional battery case, and Figures 4 to 7 are cross sections showing other embodiments of the battery case according to this invention. It is a diagram. 1... Battery case, 3... Partition wall, 5... Main battery case, 7...
...Subchamber, 9...Electrode plate, 11...Electrolyte, 15...
...Inflow port (flow path), 17...Outflow port (flow path),
19, 21...Opening/closing valve (flow regulating means), 31...
...Shikiri part (flow regulating means).

Claims (1)

[Scope of utility model registration request] A main battery cell is provided with a plurality of electrode plates and holds an electrolytic solution, and a sub-chamber is formed from the main battery cell by a partition wall disposed close to the side edge of the electrode plate, and an auxiliary chamber is formed in the upper part of the partition wall. and a flow path forming means having a flow passage formed in a lower portion thereof that communicates the main battery case and the sub-chamber, and having a flow regulating means that allows inflow and discharge of electrolyte in at least one direction in at least one of the flow passages. A battery case for vehicle storage batteries.