JP2015099697A - Exhaust structure of power storage device, exhaust method of power storage device, and power storage device including exhaust structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve a problem that connecting a power storage device including exhaust structure with a duct connected to an outdoor space of a building increases the possibility that the power storage device is directly affected by outer air and leads to trouble.SOLUTION: The exhaust structure of a power storage device includes: a housing sealing a storage battery and installed in a building; an exhaust pipe which is connected with the housing at one end part so that airtightness is maintained; and an exhaust valve which is attached to the other end part side of the exhaust pipe. The exhaust pipe exhausts air from the other end part side to the exterior of the building.

Description

  The present invention relates to a power storage device exhaust structure, a power storage device exhaust method, and a power storage device including the exhaust structure, and more particularly to a power storage device exhaust structure installed indoors such as a house, a power storage device exhaust method, and an exhaust structure. The present invention relates to a power storage device.

  The power storage device generally includes a storage battery such as a secondary battery, a power conditioner (PCS) that converts output from the storage battery into usable electricity, and the like. The storage battery has a structure in which the electrolyte or gas does not leak out of the storage battery within the range of normal use. Furthermore, a mechanism for suppressing the pressure rise in the storage battery is provided to take measures to further increase safety. In this case, an exhaust valve for exhausting gas from the storage battery, an exhaust passage for exhausted gas, and the like are provided.

  An example of a mechanism for suppressing such a pressure increase in the storage battery is described in Patent Document 1. In Patent Document 1, a storage battery 10 having a gas exhaust valve 22 and a gas collection duct 14 is loaded with a duct device 150 including a battery connection block 152 and charged in a state covered with a casing 115. The battery connection block 152 includes valve structures such as the valve body 55 and the backflow prevention valve 50. By these mechanisms, it is possible to detect and suppress an unexpected increase in internal pressure of the storage battery 10 and to minimize the contamination of other storage batteries and the like by gas or electrolyte ejected from the gas exhaust valve. .

JP 2012-221737 A

  However, the storage battery charging / discharging device described in Patent Document 1 has the following problems. In patent document 1, the gas exhaust valve and the gas backflow prevention valve are provided in the battery connection block connected to the gas collection duct of the storage battery. There is an exhaust valve on the storage battery side of the exhaust pipe in the positional relationship with the exhaust pipe connected to the outdoors. Then, since there is no exhaust valve at the end of the exhaust pipe, there is a risk that unnecessary things (dust, insects, wind and rain, etc.) may enter the exhaust pipe from outside. In addition, since the exhaust valve, which is a contact point between the ejected gas and the atmosphere, is on the storage battery side (indoor) of the exhaust pipe, if oxidation (combustion) due to atmospheric contact occurs at the contact point, combustion may occur indoors .

  The object of the present invention is to solve the above-mentioned problem, that is, if the livestock device is connected to a duct connected to the outside of the building, the possibility of being directly affected by the outside air increases and causes a problem. It is an object of the present invention to provide an exhaust structure for a device, a method for exhausting a power storage device, and a power storage device including the exhaust structure.

  The exhaust structure of the power storage device of the present invention includes a casing for sealing a storage battery and installed in a building, an exhaust pipe connected to the casing while maintaining airtightness, and another end of the exhaust pipe The exhaust pipe is exhausted to the outside of the building from the other end side.

  In the exhaust method for a power storage device according to the present invention, a casing for sealing a storage battery is disposed indoors in a building, and the casing and one end of the exhaust pipe are connected while maintaining airtightness. An exhaust valve is mounted on the end side, and exhausted from the other end side to the outside of the building.

  The power storage device exhaust structure of the present invention, the power storage device exhaust method, and the power storage device including the exhaust structure can eliminate the cause of malfunction even when connected to a duct connected to the outside of the building.

It is a side view showing composition of an electrical storage device provided with an exhaust structure of an electrical storage device concerning a 1st embodiment of the present invention. It is a figure which shows the structure of the exhaust-valve part of an electrical storage apparatus provided with the exhaust structure of the electrical storage apparatus which concerns on the 1st Embodiment of this invention, (a) shows a closed state, (b) shows an open state. It is a figure which shows the structure of an electrical storage apparatus provided with the exhaust structure of the electrical storage apparatus which concerns on the 2nd Embodiment of this invention, (a) is a front view, (b) is a side view. It is a figure which shows the structure of an electrical storage apparatus provided with the exhaust structure of the electrical storage apparatus which concerns on the 2nd Embodiment of this invention, (a) is a rear view, (b) is a side view. It is an enlarged view of the exhaust structure of the electrical storage apparatus which concerns on the 2nd Embodiment of this invention. It is a perspective view which shows the cover open state of the exhaust structure of the electrical storage apparatus which concerns on the 2nd Embodiment of this invention. It is a figure which shows the structure of an electrical storage apparatus provided with the exhaust structure of the electrical storage apparatus which concerns on the 3rd Embodiment of this invention, (a) is a rear view, (b) is a side view.

  Next, embodiments for carrying out the present invention will be described with reference to the drawings. In the following description, components having the same function may be denoted by the same reference numerals and description thereof may be omitted.

(First embodiment)
FIG. 1 is a side view showing a configuration of a power storage device including an exhaust structure for a power storage device according to the first embodiment of the present invention. The battery housing 11 is a housing that houses a storage battery. The exhaust pipe 13 is a pipe that guides the gas ejected into the battery housing 11 to the outdoors. The end of the exhaust pipe 13 includes a mounting structure for mounting on the outer wall 16 of the building, for example. The exhaust valve 22 is installed at a boundary portion between the exhaust pipe 13 and the outside, for example, on the outer wall 16 (outdoor). The exhaust valve 22 is a reversible safety valve that opens when the pressure is higher than a predetermined pressure and closes when the pressure is lower than the predetermined pressure.

  2A and 2B are diagrams showing the configuration of the exhaust valve 22 of the power storage device including the exhaust structure of the power storage device according to the first embodiment of the present invention, where FIG. 2A is a normal pressure state and FIG. 2B is an abnormal pressure state. Indicates. The gas exhaust valve 22 includes an exhaust valve main body 221 and an exhaust valve lid 222. The exhaust valve cover 222 is brought into close contact with the exhaust valve main body 221 by an urging mechanism (not shown), and is closed at a predetermined pressure or lower (FIG. 2A), and is opened at a predetermined pressure or higher. (FIG. 2 (b)).

  The battery housing 11 is connected to the exhaust valve 22 through the exhaust pipe 13 while maintaining airtightness. At this time, the pressure resistance of the exhaust valve 22 is set to be lower than the pressure resistance of the battery casing 11 and the exhaust pipe 13. Then, when the internal pressure of the battery housing 11 increases (abnormal pressure state), the exhaust valve lid 222 separates as the internal pressure rises, and as shown by the arrows in FIG. Gas exhaust starts from the gap. As a result, the battery casing 11 and the exhaust pipe 13 are not destroyed, and the ejected gas does not leak into the building where the battery casing 11 is installed. And the gas which ejected is discharged | emitted safely outdoors in a building.

  In addition, when the internal pressure of the battery housing 11 decreases as the gas is blown and becomes equal to or lower than a predetermined pressure (normal pressure state), the cover 222 of the exhaust valve is closed, and the exhaust of the gas ends. As a result, the airtightness of the battery casing 11 and the exhaust pipe 13 is maintained again.

  As described above, the gas ejected into the battery housing 11 can be discharged from the exhaust valve without leaking into the building. In this way, the jetted gas can be immediately discharged outside the building. In addition, after the pressure increase due to the gas ejection becomes a predetermined value or less, the airtightness in the battery casing 11 and the exhaust pipe 13 is maintained again. Therefore, even when the combustion gas generated inside the casing is burning, the inflow of outside air is blocked in the sealed battery casing 11 and the exhaust pipe 13 to be in an oxygen deficient state. As a result, there is an effect that can be extinguished.

(Second Embodiment)
3A and 3B are diagrams showing a configuration of a power storage device including an exhaust structure for a power storage device according to the second embodiment of the present invention, where FIG. 3A is a front view and FIG. 3B is a side view. The difference between the present embodiment shown in FIG. 3 and the first embodiment shown in FIG. 1 is that an exhaust mechanism is directly installed at the tip of the exhaust pipe 13 or through a PCS (Power Conditioning Subsystem) housing. Is installed. Other configurations are the same as those of the first embodiment shown in FIG.

  The PCS housing 12 is a housing that houses a power conditioner (PCS), and is installed outside the building. Therefore, the PCS housing 12 includes a connection portion for mounting on the outer wall of the building. The exhaust pipe 13 is a pipe that connects the battery casing 11 and the PCS casing 12. The battery casing 11 is connected to the PCS casing 12 through the exhaust pipe 13 while maintaining airtightness. At this time, the rigidity of the lid 18 of the PCS housing described later is set so that the pressure resistance of the PCS housing 12 is lower than the pressure resistance of the battery housing 11 and the exhaust pipe 13. Next, the abnormal pressure state will be described. First, the configuration of the power storage device is as follows.

  4A and 4B are diagrams illustrating a configuration of a power storage device including an exhaust structure for a power storage device according to the second embodiment of the present invention, where FIG. 4A is a rear view and FIG. 4B is a side view. FIG. 5 is a side view of the exhaust structure of the power storage device according to this embodiment, and shows an enlarged view of FIG. The lid 182 of the PCS housing is attached to the main body portion of the PCS housing 12 using, for example, a lock mechanism 23 using a hinge.

  FIG. 6 is a perspective view showing a lid open state of the PCS housing 12 according to the present embodiment. The overall shape of the inner packing 19 is a square ring shape as shown in FIG. Then, the lid 18 is tightened into the PCS housing 12 via the internal packing 19 using the lock mechanism 23 as described above. It should be noted here that no lock mechanism is provided on all four sides of the lid 18. For example, a lock mechanism is disposed only on two opposite sides. Then, the number and position of the lock mechanisms provided on one side are optimized. Such an arrangement of the lock mechanism assists the progress of the deformation of the lid 18 when abnormal pressure occurs, and adjusts the pressure-bonding property between the lid 18 and the PCS housing 12 to reduce the pressure resistance of the lid 18 as an exhaust valve. Adjustable.

  For example, aluminum is used as the material of the lid 18. It is because it is soft and elastically deformable and inexpensive. Moreover, for example, EPDM (ethylene propylene diene rubber) is used as the material of the inner packing 19. Subsequently, the effects of the power storage device in the abnormal pressure state are as follows.

  When the internal pressure of the battery casing 11 is increased (abnormal pressure state), when the gas pressure that is blown out exceeds the pressure resistance of the PCS casing 12, the lid 18 of the PCS casing is deformed, as shown by the arrow in FIG. The exhaust of gas starts from the deformed gap of the elastically deformed lid 182. As a result, the battery casing 11 and the exhaust pipe 13 are not destroyed, and the ejected gas does not leak into the building where the battery casing 11 is installed. And the jetted gas is safely discharged | emitted from the cover part to the building exterior through the PCS housing | casing installed in the building exterior.

  Then, when the internal pressure of the battery casing 11 decreases as the gas is blown and becomes equal to or lower than a predetermined pressure (normal pressure state), the elastic deformation of the lid 18 of the PCS casing is eliminated, and the lid 181 in the normal state. After returning to the state of FIG. As a result, the airtightness of the battery casing 11 and the exhaust pipe 13 is maintained again.

  As described above, the gas ejected into the battery casing 11 can be discharged through the PCS casing installed outside the building without leaking into the building. In this way, the jetted gas can be immediately discharged outside the building. In addition, after the pressure increase due to the gas ejection becomes a predetermined value or less, the airtightness in the battery casing 11 and the exhaust pipe 13 is maintained again. Therefore, even when the combustion gas generated inside the casing is burning, the inflow of outside air is blocked in the sealed battery casing 11 and the exhaust pipe 13 to be in an oxygen deficient state. As a result, there is an effect that can be extinguished.

  Furthermore, in this embodiment, there exists an effect which can hide the connection part for mounting | wearing with the piping hole and exhaust pipe provided in the outer wall of a building with a PCS housing | casing.

(Third embodiment)
7A and 7B are diagrams showing a configuration of a power storage device including an exhaust structure for a power storage device according to the third embodiment of the present invention, where FIG. 7A is a rear view and FIG. 7B is a side view. The difference between the present embodiment shown in FIG. 7 and the second embodiment shown in FIGS. 3 to 6 resides in the exhaust mechanism in the PCS housing 12. The configuration other than the exhaust mechanism is the same as that of the second embodiment shown in FIGS.

  The exhaust mechanism of the present embodiment is an exhaust valve 22 and is installed on a part of the surface of the PCS housing 12 that contacts the building exterior. The exhaust valve 22 is a reversible safety valve that opens when the pressure is higher than a predetermined pressure and closes when the pressure is lower than the predetermined pressure. The battery casing 11 is connected to the PCS casing 12 through the exhaust pipe 13 while maintaining airtightness. At this time, the pressure resistance of the exhaust valve 22 is set to be lower than the pressure resistance of the battery casing 11, the exhaust pipe 13, and the PCS casing 12.

  When the internal pressure of the battery casing 11 increases (abnormal pressure state), the exhaust valve lid 222 separates as the internal pressure increases, and gas exhaust begins through the gap between the open exhaust valve lids. As a result, the battery casing 11 and the exhaust pipe 13 are not destroyed, and the ejected gas does not leak into the building where the battery casing 11 is installed. And the gas which ejected is discharged | emitted safely outdoors in a building.

  Then, when the internal pressure of the battery casing 11 decreases with the gas ejection and becomes a predetermined pressure or lower (normal pressure state), the cover of the exhaust valve is closed, and the exhaust of the gas ends. As a result, the airtightness of the battery casing 11, the exhaust pipe 13, and the PCS casing 12 is maintained again.

  As described above, the gas ejected into the battery housing 11 can be discharged from the exhaust valve without leaking into the building. In this way, the jetted gas can be immediately discharged outside the building. In addition, after the pressure increase due to the gas ejection becomes a predetermined value or less, the airtightness in the battery casing 11 and the exhaust pipe 13 is maintained again. Therefore, even if the combustion gas generated inside the casing is burning, the inflow of outside air is blocked in the sealed battery casing 11 and the exhaust pipe 13 to be in an oxygen deficient state. As a result, there is an effect that can be extinguished.

  Further, as in the second embodiment, this embodiment also has an effect that the connection portion for mounting the piping hole and the exhaust pipe provided in the outer wall of the building can be hidden by the PCS housing.

  The present invention is not limited to the above-described embodiment, and various modifications can be made within the scope of the invention described in the claims. For example, there are the following modifications. Needless to say, these are also included in the scope of the present invention.

  For example, the exhaust pipe 13 can be modified as follows. The shapes of both ends of the exhaust pipe (the connection portion between the casing and the exhaust pipe in which the storage battery is sealed and the connection portion between the tip of the exhaust pipe and the exhaust valve) may be tapered. This is for facilitating installation at each connection portion and reducing piping resistance at the connection portion. Further, the cross-sectional shape of the exhaust pipe is preferably circular, but is not limited to this shape. For example, it may be oval. Further, the entire shape of the exhaust pipe may be a bellows-like pipe.

  The exhaust pipe 13 is preferably about 20 m at the maximum. This is because when the parallel electric wirings are longer than this, the adverse effects due to voltage drops in the wirings cannot be ignored. On the other hand, when the total length of the exhaust pipe is short, the degree of freedom of the installation location inside the building is reduced. Therefore, it is preferable that there is 0.5 m or more.

  The inner diameter of the exhaust pipe is preferably 50 mm or more. This is to reduce the pipe resistance, which is the resistance generated when gas flows in the pipe. On the other hand, considering the ease of bending and handling of the pipe, the inner diameter is desirably 150 mm or less. More preferably, the exhaust pipe has an inner diameter of 80 mm or more and 100 mm or less.

  The exhaust pipe is made of, for example, phenol resin. This is because among the synthetic resins, they are excellent in heat resistance, cold resistance and flame resistance, and are mechanically strong.

  Further, a partition plate for controlling the gas flow may be provided in the PCS casing. This is because when the gas flows into the PCS casing from the exhaust pipe, unnecessary contact between the gas and the electric parts is avoided, and the gas can be quickly discharged out of the PCS casing.

  Further, the following modifications are possible with respect to the position and number of exhaust valves and exhaust mechanisms. In addition to the exhaust valve and the exhaust mechanism facing the building exterior, it may be provided in the exhaust pipe or in the vicinity of the connection between the exhaust pipe and the storage battery. A double and triple sealed structure can be secured, which is a further safety measure.

  The PCS may be included in the battery casing and installed in the building. Alternatively, the PCS may be installed in the building separately from the battery casing in a state where the PCS is included in the PCS casing. Or the PCS housing | casing containing PCS may be installed in places other than the outer wall of a building, for example, the ground.

DESCRIPTION OF SYMBOLS 11 Battery housing | casing 12 PCS housing | casing 13 Exhaust pipe 14 Inner wall 15 Floor board 16 Outer wall 17 Outer wall hole 18 Lid of PCS housing 181 Normal state lid 182 Elastic deformation state lid 19 Internal packing 22 Exhaust valve 221 Exhaust valve body 222 Exhaust Valve lid 23 Lock mechanism

Claims (15)

A case in which the storage battery is sealed and installed in the building;
An exhaust pipe that is connected to the casing while maintaining airtightness at one end;
An exhaust valve mounted on the other end side of the exhaust pipe,
The exhaust structure of the power storage device, wherein the exhaust pipe exhausts to the outside of the building from the other end side. The exhaust structure for a power storage device according to claim 1, wherein the other end portion includes a mounting structure for mounting on the outer wall of the building. The exhaust structure for a power storage device according to claim 1, wherein the other end is installed outside the building. 4. The exhaust structure for a power storage device according to claim 1, wherein a pressure resistance of the exhaust valve is smaller than a pressure resistance of the casing and the exhaust pipe. 5. 5. The power storage device according to claim 1, wherein the exhaust valve is a reversible valve that opens when the pressure is higher than a predetermined pressure and closes when the pressure is lower than the predetermined pressure. 6. Exhaust structure. An exhaust structure for a power storage device according to any one of claims 1 to 5,
The storage battery sealed in the housing of the exhaust structure;
And a power conditioner that converts the output of the storage battery into usable electricity. The power storage device according to claim 6, wherein a housing for storing the power conditioner includes a connection portion for mounting on an outer wall of the building. 8. The power storage device according to claim 6, wherein the other end of the exhaust pipe is attached to a casing that houses the power conditioner. 8. The power storage device according to claim 6, wherein a housing for storing the power conditioner is in an open state at a predetermined pressure or higher and is closed at a predetermined pressure or lower. 10. The power storage device according to claim 9, wherein a pressure resistance of a housing that houses the power conditioner is smaller than a pressure resistance of the housing that seals the storage battery and the exhaust pipe. The housing for storing the inverter is
A lid that can be freely opened and closed;
A lock structure for attaching the lid to the housing;
11. The power storage device according to claim 9, wherein the lid portion is elastically deformed at a predetermined pressure or higher and the deformation is eliminated at a predetermined pressure or lower. The exhaust structure for a power storage device according to any one of claims 1 to 5, further comprising a tapered connection portion on an end portion side of the exhaust pipe. 6. The exhaust structure for a power storage device according to claim 1, wherein a length of the exhaust pipe is not less than 0.5 meters and not more than 20 meters. 6. The exhaust structure for a power storage device according to claim 1, wherein an inner diameter of the exhaust pipe is not less than 50 millimeters and not more than 150 millimeters. The enclosure that seals the storage battery is placed inside the building,
Connecting the casing and one end of the exhaust pipe while maintaining airtightness;
An exhaust valve is mounted on the other end side of the exhaust pipe,
An exhaust method for a power storage device, wherein the exhaust is performed to the outside of the building from the other end side.

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