JP2018077932A - Power supply device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To guide gas to an exhaust duct 2 with a simple structure by reducing leakage of gas exhausted from a gas exhaust valve 4.SOLUTION: On the upper surface of a battery block 1 having a plurality of laminated battery cells 6, an exhaust duct 2 is coupled so that an inflow opening 7 is coupled to an opening of a gas exhaust valve 4 of each battery cell 6. A broken line 10 is provided on a rupture membrane 8 of the gas exhaust valve 4, and in a state where the gas exhaust valve 4 is opened whose the rupture membrane 8 is ruptured, a rupture edge 8A ruptured and separated from the rupture membrane is arranged upward than the lower end edge of the exhaust duct 2, thereby guiding exhaust gas to the exhaust duct 2.SELECTED DRAWING: Figure 2

Description

  The present invention mainly relates to a power supply device that is optimal as a power source for a motor that drives a vehicle such as a hybrid car or an electric vehicle, or a power source for large currents that is used for power storage for home use or factory use. The present invention relates to a power supply device that discharges exhaust gas such as gas discharged from a gas discharge valve of a cell to the outside through a discharge duct.

  In the power supply device, a plurality of battery cells are connected in series to increase the output voltage, and connected in parallel to increase the output current, and the number of battery cells is increased to increase the chargeable / dischargeable capacity. In this power supply device, each battery cell is provided with a gas discharge valve in order to improve safety. The gas discharge valve opens when the internal pressure of the battery cell rises abnormally and prevents the outer can of the battery cell from being destroyed. In order to smoothly discharge the gas discharged from the gas discharge valve to be opened to the outside, a power supply device in which a discharge duct is connected to the discharge port of the gas discharge valve has been developed (see Patent Document 1). In particular, in a power supply device mounted on an electric vehicle, a battery cell having a large capacity is adopted. However, as the capacity of each battery cell increases, the amount of gas discharged when the gas discharge valve is activated also increases. . Therefore, the power supply device used in this type of application is often configured to be able to guide the gas discharged from the gas discharge valve to the outside through the discharge duct.

JP 2013-171746 A

  In the power supply device of Patent Document 1, rectangular batteries are stacked so that the discharge port of the gas discharge valve is located on the upper surface to form a battery block. On the upper surface of the battery block, a discharge duct is connected to a discharge port of each gas discharge valve. The power supply device having this structure can exhaust the gas discharged from the gas discharge valve to the outside through the discharge duct.

  In the power supply device in which the discharge duct is disposed on the upper surface of the battery block, it is difficult to allow exhaust gas such as gas discharged from the gas discharge valve to flow into the discharge duct without leakage. In particular, the structure in which the discharge duct is connected to the battery block in which a large number of battery cells are stacked has a dimensional error of the battery cell, a relative positional deviation between the battery cell and the discharge duct, and a sealant. Therefore, it is extremely difficult to connect the exhaust duct to a fixed position of the battery block for a long period of time without exhaust gas leakage due to deterioration of the sealing material.

  The present invention has been developed for the purpose of solving the above drawbacks. An important object of the present invention is to use a rupture membrane of a battery cell in combination with an exhaust gas guide to make the structure extremely simple, while reducing leakage of exhaust gas exhausted from the opened gas exhaust valve and guiding it to the exhaust duct. It is another object of the present invention to provide a power supply device that can be discharged to the outside.

Means for Solving the Problems and Effects of the Invention

  In the power supply device of the present invention, a gas discharge duct 2 is connected to the upper surface of the battery block 1. In the battery block 1, a plurality of battery cells 6 each provided with a discharge port 5 of the gas discharge valve 4 are stacked on the top plate 3 in a posture in which the top plate 3 is arranged on the same plane. The discharge duct 2 is arranged on the top surface of the top plate 3 in a posture extending in the stacking direction of the plurality of battery cells 6, and has an inflow opening 7 provided on the surface facing the top plate 3 of each battery cell 6. It is connected to the outlet 5. The gas discharge valve 4 includes a rupture film 8 that is fixed inside the top plate 3 and hermetically seals the discharge port 5. The gas discharge valve 4 breaks the rupture film 8 in a state where the internal pressure of the battery cell 6 is higher than the set pressure, and exhausts the gas in the battery cell 6 from the discharge port 5 to the discharge duct 2. The rupture film 8 is provided with a rupture line 10 that is ruptured in a state where the internal pressure of the battery cell 6 is higher than the set pressure. In the state in which the rupture film 8 is ruptured and the gas discharge valve 4 is opened, the rupture edge 8A that is ruptured and separated is disposed above the lower end edge of the discharge duct 2 so that the exhaust gas is supplied to the discharge duct 2. I try to guide you.

  The above power supply device can use the ruptured rupture film together with a guide that guides the exhausted gas to the exhaust duct, allowing the exhaust gas to flow into the exhaust duct without leaking, and discharging the exhaust gas without leaking over a long period of time. It can be discharged outside. In particular, the above power supply apparatus does not require a dedicated member to guide the gas discharged from the opened gas discharge valve to the discharge duct without leakage, and guides the gas of the broken membrane to the discharge duct. Since it is also used as a guide for blocking gas leakage, the gas can be discharged to the outside of the discharge duct without leakage while having an extremely simple structure. Further, the above power supply device guides the exhaust gas to the exhaust duct by disposing the rupture film, which is ruptured by the internal pressure of the battery cell, with the rupture edge separated by breaking above the lower end edge of the exhaust duct. Each separated rupture membrane discharges the discharged gas above the lower edge of the discharge duct, effectively blocking the gas leak from the gap between the discharge duct and the battery cell. To do.

  Furthermore, since the above power supply device prevents gas leakage by guiding the gas to the discharge duct with a rupture film, there is a gap between the discharge duct and the battery block due to dimensional errors, deterioration over time, and displacement. Even if it occurs, a feature that it can be guided to the discharge duct and discharged to the outside while reducing gas leakage is realized.

  The rupture film 8 of the power supply device of the present invention is connected to both ends of the rupture line 10 and is provided with both end rupture lines 11 extending in both directions of the rupture line 10 in a direction intersecting the rupture line 10. In a state where 10 is broken, the both-end broken line 11 is also broken, and the gas discharge valve 4 can be opened.

  The power supply device described above has a feature that exhaust gas can be more smoothly guided to the discharge duct and discharged to the outside without leakage. This is because the rupture membrane is broken at both the rupture line and the both-end rupture line, and is transformed into an ideal shape that can guide the exhaust gas without leaking into the exhaust duct.

  The power supply device of the present invention is provided with a folding line 12 so as to connect the ends of both-end fracture lines 11 arranged at both ends of the fracture line 10, and the both-end fracture line in a state where the fracture line 10 is fractured. 11 can also be broken, and the bent line 12 can be bent to open the gas discharge valve 4.

  The power supply device described above has a feature that exhaust gas can be more smoothly guided to the discharge duct and discharged to the outside without leakage. It is deformed into a more ideal shape that can guide the exhaust gas not to leak into the exhaust duct by breaking the break membrane at both the break line and the break line at both ends and then folding at the folding line Because.

  In the power supply device of the present invention, a connecting cylinder 13 to be inserted into the discharge port 5 of the gas discharge valve 4 is provided in the inflow opening 7 of the discharge duct 2, and the connecting cylinder 13 is inserted into the discharge port 5, The discharge port 5 of the gas discharge valve 4 can be connected to the two inflow openings 7.

  The power supply device described above has a feature that exhaust gas can be more smoothly guided to the discharge duct and discharged to the outside without leakage. Because the connecting cylinder of the exhaust duct is inserted into the exhaust port of the gas exhaust valve, the tip of the ruptured membrane is inserted inside the connecting cylinder, and the ruptured membrane transformed into this shape discharges the exhaust gas. This is because it can be guided so as not to leak further into the duct. Moreover, if it is set as the structure which inserts the connection cylinder of a discharge duct in the discharge port of a gas exhaust valve, the effect which absorbs the position shift accompanying the laminated structure of a battery cell by deformation | transformation of a connection cylinder can also be anticipated.

  The power supply device according to the present invention is configured so that the outer shape of the connecting tube 13 is smaller than the inner shape of the discharge port 5 of the gas discharge valve 4 and the connecting tube 13 is inserted into the discharge port 5 of the gas discharge valve 4. A gap for absorbing dimensional errors can be provided between 13 and the outlet 5.

  Even in the battery block in which a large number of battery cells are stacked, the above power supply apparatus reliably inserts a connecting cylinder into the discharge port of the gas discharge valve of each battery cell having a dimensional error, thereby discharging the exhaust gas more smoothly. It has the characteristic that it can be discharged to the outside without being leaked by guiding it. In particular, even if a leak gap occurs between the connecting cylinder and the discharge port due to a dimensional error, the connecting tube of the discharge duct is inserted into the discharge port of the gas discharge valve, so that the tip of the broken membrane is broken. Can be inserted inside the connecting cylinder to guide the exhaust gas from leaking further into the exhaust duct.

  In the power supply device of the present invention, the inflow opening 7 of the discharge duct 2 can be connected to the discharge port 5 of the gas discharge valve 4 through the sealing material 14. The power supply device can be inserted into the discharge duct 2 with less leakage of exhaust gas with a sealing material and discharged to the outside. The sealing material can be provided between the surface of the top plate 3 and the discharge duct 2.

  In the power supply device of the present invention, the battery cell can be a non-aqueous electrolyte secondary battery. This power supply device can increase the charge / discharge capacity of the entire battery block by using a non-aqueous electrolyte secondary battery having a large charge / discharge capacity.

It is a general | schematic disassembled perspective view which shows the power supply device concerning the Example of this invention. It is a power supply device shown in FIG. 1, and is sectional drawing which shows the connection part of a discharge duct and a battery cell. It is a power supply device concerning the other Example of this invention, and is sectional drawing which shows the connection part of a discharge duct and a battery cell. It is a power supply device concerning the other Example of this invention, and is sectional drawing which shows the connection part of a discharge duct and a battery cell. It is a power supply device concerning the other Example of this invention, and is sectional drawing which shows the connection part of a discharge duct and a battery cell. It is a top view which shows the discharge port of the gas discharge valve of the battery block shown in sectional drawing of FIG. It is a top view which shows the discharge port of the gas discharge valve of the battery block concerning another Example. It is the perspective view which looked at the discharge duct of the power supply device shown in FIG. 1 from the bottom.

  Embodiments of the present invention will be described below with reference to the drawings. However, the embodiments described below exemplify a power supply device for embodying the technical idea of the present invention, and the present invention does not specify the power supply device as follows. However, the members shown in the claims are not limited to the members in the embodiments.

  In the power supply device shown in FIG. 1, a discharge duct 2 that discharges exhaust gas discharged from a gas discharge valve 4 of a battery cell 6 to the outside is connected to a battery block 1 in which a plurality of battery cells 6 are stacked. .

  The battery block 1 is formed by stacking prismatic battery cells 6 each having a square opposing surface. The battery cell 6 is a rectangular battery having a rectangular shape with an opposing surface that is wider than the thickness, in other words, thinner than the width, and is stacked in the thickness direction to form the battery block 1. The battery cell 6 is a lithium ion secondary battery. However, the battery cell 6 can use not only non-aqueous electrolyte secondary batteries, such as a lithium ion secondary battery, but all the other secondary batteries which can be charged.

  In the battery block 1, a plurality of battery cells 6 are connected to the top plate 3 so that gas discharged from the gas discharge valve 4 of each battery cell 6 can flow into the discharge duct 2 fixed to the upper surface of the top plate 3. Are arranged in the same plane, and the gas discharge valves 4 of the respective battery cells 6 are stacked in such a manner that they are arranged linearly in the stacking direction.

  The battery cell 6 in FIG. 1 hermetically seals the upper opening of the outer can with a sealing plate. The top plate 3 on the upper surface is a sealing plate, and positive and negative electrode terminals 15 protrude from both ends thereof, and the discharge port 5 of the gas discharge valve 4 is provided at the center. The outer can and the sealing plate are made of metal such as aluminum or aluminum alloy, and the outer can is manufactured by pressing the metal plate, and the sealing plate is fixed to the upper opening of the outer can so as to hermetically seal the outer can. ing. The sealing plate of the top plate 3 has positive and negative electrode terminals 15 fixed to both ends thereof, and a gas discharge valve 4 is provided between the positive and negative electrode terminals 15. The gas discharge valve 4 is provided on the sealing plate with a fracture film 8 fixed to the inner surface of the discharge port 5 of the sealing plate.

  The plurality of battery cells 6 to be stacked are connected in series and / or in parallel via positive and negative electrode terminals 15. The positive and negative electrode terminals 15 of the adjacent battery cells 6 are connected to each other in series and / or in parallel via the bus bar 16 or are connected by directly connecting the electrode terminals. The power supply device in which adjacent battery cells are connected in series can increase the output voltage, and can connect adjacent battery cells in parallel to increase the charge / discharge current. The battery cells 6 connected in series are stacked in an insulated state with an insulating separator (not shown) interposed between the battery cells 6 or by insulating the surface of the battery cells 6. However, the battery cell 6 can be laminated without insulating the outer can as an insulating material such as plastic. In the battery block 1 shown in FIG. 1, a plurality of battery cells 6 are stacked in a posture in which the top plate 3 is arranged on the same surface, and the discharge ports 5 of the respective battery cells 6 are arranged linearly. In the battery block 1 in which a plurality of battery cells 6 are stacked, end plates 17 are disposed on both end faces thereof, and a pair of end plates 17 are connected by a connector (not shown) so that the battery cells 6 are stacked. It is fixed to.

  The gas discharge valve 4 includes a rupture film 8 fixed inside the top plate 3, that is, inside the sealing plate. The rupture film 8 is not ruptured in a state where the internal pressure of the battery cell 6 does not become higher than the set pressure, and the discharge port 5 is hermetically sealed to close the gas discharge valve 4. When the internal pressure of the battery cell 6 becomes higher than the set pressure, the rupture film 8 is ruptured, and the gas discharge valve 4 is opened. When the gas discharge valve 4 is opened, the inside of the battery cell 6 is opened to the outside through the discharge port 5, and the gas is discharged from the inside to the discharge duct 2 to prevent the internal pressure from increasing.

  The rupture film 8 is broken when the internal pressure of the battery cell 6 becomes higher than the set pressure, and the gas discharge valve 4 is opened. In addition to the action of the valve body that controls the opening and closing of the gas discharge valve 4, the rupture film 8 is used in combination with the action of a guide that guides the gas discharged from the discharge port 5 to the discharge duct 2 to prevent gas leakage. The The rupture film 8 is provided with a rupture line 10 so as to be deformed into a specific posture in a ruptured state and to guide the gas discharged from the discharge port 5 to the discharge duct 2. The battery cell 6 in FIG. 1 is provided with a break line 10 so as to extend in the battery cell stacking direction, that is, in the thickness direction of the battery cell.

  The broken state of the rupture film 8 is indicated by a chain line in the enlarged sectional view of FIG. As shown in this figure, the rupture film 8 is ruptured by being pushed by the internal pressure of the battery cell 6, so that the separated rupture edge 8A moves upward and discharges between the rupture edge 8A and the bent portion. It is made to contact the lower end edge of the side wall 18 provided on both sides of the duct 2. The rupture film 8 deformed in this shape places the rupture edge 8A above the lower end edge of the discharge duct 2, and guides the flow direction of the discharged gas upward as indicated by an arrow. The discharged gas flows along the rupture film 8 that is tapered and deforms into a tapered shape, and flows upward as indicated by an arrow from between the separated rupture edges 8A. The exhaust gas guided upward by the fractured membrane 8 that has been broken flows toward the inside of the discharge duct 2 and is discharged outside without leaking from the gap between the discharge duct 2 and the battery cell 6. Since the pressure of the flowing gas decreases as the flow rate increases, the pressure of the exhaust gas flowing at high speed through the gap between the separated fracture edges 8 </ b> A decreases and leaks from the gap between the discharge duct 2 and the battery cell 6. To prevent.

  Further, since the rupture film 8 of the battery cell of FIG. 1 is provided with the rupture line 10 so as to extend in the stacking direction of the battery cells 6, in the ruptured state, as shown in FIG. The break edges 8A on both sides are arranged above the lower end edge of the discharge duct 2 by being pushed by the. The rupture film 8 that has been broken and deformed into this shape is deformed into a C shape on both sides of the discharge duct 2 and inside the side wall 18 that extends in the stacking direction of the battery cells 6, so that the discharge duct 2 and the battery cell 6 are deformed. Gas leakage from the gap between the two is shielded. The separated broken edge 8A is above the lower end edge of the side wall 18, exhaust gas is discharged upward from the broken edge 8A, and the exhaust gas flows into the gap between the side wall 18 and the battery cell 6. It is because it prevents. In other words, the exhaust gas passes through the gap between the fracture films 8 on both sides that have been broken and deformed into a letter C shape, and is discharged upward from the fracture edge 8A of the fracture film 8. Since the rupture edge 8 </ b> A for discharging the gas is located above the lower end edge of the side wall 18 provided on both sides of the discharge duct 2, the rupture film 8 discharges the exhaust gas from the gap between the discharge duct 2 and the battery cell 6. Is also discharged upward, and it is prevented from flowing into the gap between the side wall 18 of the discharge duct 2 and the battery cell 6. That is, the ruptured rupture film shields the gas flowing into the gap and prevents gas leakage.

  The rupture film 8 of the gas discharge valve 4 of FIGS. 6 and 7 is connected to both ends of the rupture line 10 to provide a rupture line 11 at both ends in order to control the shape in the rupture state to a more ideal shape. . The break film 8 in FIG. 6 is provided with a break line 10 so as to extend in the stacking direction of the battery cells 6. 7 is provided with a rupture line 10 so as to extend in the width direction of the battery cell 6. As shown in the plan views of FIGS. 6 and 7, the both-end fracture line 11 extends in the direction intersecting with the fracture line 10, in the direction orthogonal to the fracture line 10 in the drawing, on both sides of the fracture line 10. It is provided as follows. Since the rupture film 8 is broken at both the rupture line 10 and the both-end rupture line 11, the entire rupture edge 8A is disposed above the lower end edge of the discharge duct 2 so that the exhaust gas can be discharged more smoothly. 2 can be guided.

  Further, the fracture film 8 of FIGS. 6 and 7 is provided with a folding line 12 in addition to the fracture line 10. The bending line 12 is provided so as to connect the tip ends of the both-end broken line 11 connected to both ends of the broken line 10. 6 is between the inner edge of the discharge port 5 and the breaking line 10 and is bent at a position closer to the inner edge of the discharge port 5 than the inner edge of the discharge port 5 and the central part of the breaking line 10. Line 12 is provided. The rupture film 8 is bent at the fold line 12 in a ruptured state, and guides the exhaust gas to the discharge duct 2 more smoothly. This is because, as shown in the enlarged sectional views of FIGS. 3 to 5, the broken membrane 8 is deformed to a large inclination angle closer to a vertical posture, and the exhaust gas can be smoothly guided to the exhaust duct 2. is there. In particular, since the rupture film 8 with the bent line 12 can adjust the position of the fold line 12 to adjust the inclination angle in the ruptured state, the shape of the ruptured film 8 is changed to the size of the discharge port 5 and the discharge. The characteristic which can be made into the optimal shape for the shape of the duct 2 is also realizable.

  The discharge duct 2 allows the gas discharged from the gas discharge valve 4 of each battery cell 6 to flow in and discharges it to the outside. As shown in FIGS. 2 to 5, the discharge duct 2 has a cylindrical shape or a groove shape having an inflow opening 7 below, and is disposed on the top surface of the top plate 3 so as to extend in the stacking direction of the plurality of battery cells 6. The inflow opening 7 is connected to the discharge port 5 of the gas discharge valve 4 of the battery cell 6 on the surface facing the top plate 3. In the discharge duct 2, the lower end edges of the side walls 18 provided on both sides are connected to the top plate 3 of the battery cell 6, and the inflow opening 7 is connected to the gas discharge valve 4 of each battery cell 6.

  FIG. 8 is a perspective view of the discharge duct 2 shown in the cross-sectional views of FIGS. 2 and 3 as viewed from below. The exhaust duct 2 shown in this figure has a rectangular tube shape as a whole, and a connecting cylinder 13 inserted into the exhaust port 5 of the gas exhaust valve 4 is provided on the bottom so as to protrude from the lower surface. The discharge duct 2 can more reliably guide the gas discharged from the gas discharge valve 4 to the discharge duct 2 by inserting the connecting cylinder 13 into the discharge port 5. The battery cell 6 connected to the discharge duct 2 having this shape can prevent gas leakage by using the fractured membrane 8 shown in FIGS. 6 and 7. Since the connecting cylinder 13 is inserted into the discharge port 5 of the gas discharge valve 4, the broken membrane 8 is bent upward on the inner surface of the opposing peripheral wall of the connecting cylinder 13, and the exhaust gas is supplied to the discharge duct 2. Because it induces.

  The discharge duct 2 shown in FIG. 4 has a groove shape as a whole, and an inflow opening 7 that is continuous in a slit shape is provided on the lower surface. As shown in FIG. 6, the discharge duct 2 can effectively prevent gas leakage by using the battery cell 6 provided with the breaking line 10 extending in the stacking direction of the battery cell 6. This is because, as shown in the cross-sectional view of FIG. 4, the broken film 8 is disposed on the inner surfaces of the side walls 18 on both sides of the discharge duct 2 to shield gas leakage. In the exhaust duct 2 in this figure, the lower end surfaces of the side walls 18 on both sides are in contact with the upper surface of the top plate 3, and the inflow opening 7 is connected to the exhaust port 5 of the gas exhaust valve 4. As shown in FIG. 4 and the chain line in FIG. 6 and FIG. 7, the discharge duct 2 having this structure has a rubber elastic sheet sealing material 14 sandwiched between the battery cell 6 and the battery cell 6. 6 can be reduced. The sealing material 14 shown in these drawings is provided with a through hole at a position where the discharge port 5 of the gas discharge valve 4 is provided, and the discharge port 5 is connected to the inflow opening 7 of the discharge duct 2 through the through hole. Link.

  The discharge duct 2 of FIG. 5 has a tapered shape with the lower end surface of the connecting tube 13 as an inclined surface. In this discharge duct 2, the connecting tube 13 can be inserted into the discharge port 5, and the gas can flow into the discharge duct 2 more smoothly with the broken film 8 being in a vertical posture.

  The discharge duct 2 provided with the connecting cylinder 13 is configured such that the outer diameter of the connecting cylinder 13 is smaller than the inner shape of the outlet 5 and the connecting cylinder 13 is inserted into the outlet 5. A gap for absorbing a dimensional error of the battery cell 6 can be provided between the two. The battery cell 6 has a dimensional error in the thickness or the position of the discharge port 5. The dimensional error of the battery cell 6 causes a positional shift of the discharge port 5 by stacking a plurality of battery cells 6. The discharge duct 2 in which the outer shape of the connecting cylinder 13 is smaller than the inner shape of the discharge port 5 can be easily inserted and assembled into the discharge port 5 of the battery cell 6 having a dimensional error. However, the gap provided between the connecting cylinder 13 and the discharge port 5 causes gas leakage. Since the power supply device of the present invention has a unique structure in which exhaust gas is guided to the exhaust duct 2 by the broken membrane 8 to prevent leakage, even if there is a gap between the connecting cylinder 13 and the exhaust port 5. The gas can be prevented from leaking and the exhaust gas can flow into the exhaust duct 2. In the power supply device having this structure, the sealing material 14 can be sandwiched between the discharge duct 2 and the upper surface of the battery cell 6 to reduce the gap and prevent gas leakage more completely.

As described above, the configuration of the power supply device according to the embodiment of the present invention has been described based on FIG. 1 to FIG. 8, but the power supply device according to the embodiment of the present invention has a plurality of configurations in addition to the above configuration. It can also be set as the structure provided with the cooling mechanism for cooling the battery cell 6. FIG.
The cooling mechanism includes an air cooling type cooling device that introduces cooling air using a fan or the like, and a liquid cooling type cooling device that uses a refrigerant. In particular, when an air-cooled cooling device is provided, it is necessary to form a flow path through which cooling air flows, and in many cases, the air is introduced into the vehicle. In such a configuration, the space in which the power supply device is disposed communicates with the space in the vehicle.

  In the embodiment of the present invention, since the exhaust duct 2 described above is provided, the space in which the power supply device is disposed and the flow path through which the gas exhausted from the gas exhaust valve 4 flows are the exhaust duct. Therefore, the gas discharged from the gas discharge valve 4 can be prevented from flowing into the vehicle.

  The power supply apparatus according to the present invention is a power supply in which a plurality of battery cells 6 are stacked to increase the capacity, and is optimally used for applications requiring high safety. It can be used particularly conveniently for an electric vehicle or the like that is required to improve safety by discharging it to the outside so as not to leak the gas discharged when the discharge valve 4 is opened.

DESCRIPTION OF SYMBOLS 1 ... Battery block 2 ... Discharge duct 3 ... Top plate 4 ... Gas discharge valve 5 ... Discharge port 6 ... Battery cell 7 ... Inflow opening part 8 ... Breaking film 8A ... Breaking edge 10 ... Breaking line 11 ... Both ends broken line 12 ... Folding Curved line 13 ... Connecting cylinder 14 ... Sealing material 15 ... Electrode terminal 16 ... Bus bar 17 ... End plate 18 ... Side wall

Claims (8)

A battery block formed by laminating a plurality of battery cells, each having a gas discharge valve outlet on the top plate, in a posture in which the top plate is arranged in the same plane;
An upper surface of the top plate is arranged in a posture extending in the stacking direction of a plurality of battery cells, and an inflow opening formed on a surface facing the top plate is connected to the discharge port of each battery cell. A discharge duct,
The gas discharge valve includes a rupture membrane fixed inside the top plate and hermetically sealing the discharge port,
The gas discharge valve is a power source configured to break the rupture film in a state where the internal pressure of the battery cell is higher than a set pressure, and to exhaust the gas in the battery cell from the discharge port to the discharge duct. A device,
The rupture membrane is provided with a rupture line that is ruptured in a state where the internal pressure of the battery cell is higher than a set pressure,
In the state where the rupture membrane is ruptured and the gas discharge valve is opened, the rupture edge separated by rupture is disposed above the lower end edge of the discharge duct to guide the exhaust gas to the discharge duct. A power supply device characterized by comprising: The power supply device according to claim 1,
The rupture membrane is connected to both ends of the rupture line, and is provided in a direction intersecting the rupture line and extending on both sides of the rupture line.
The power supply apparatus according to claim 1, wherein the both-end broken line is also broken while the broken line is broken, so that the gas discharge valve is opened. The power supply device according to claim 2,
A bending line is provided so as to connect the ends of the both-end breaking lines arranged at both ends of the breaking line,
The power supply apparatus, wherein the both-end broken line is broken and the bent line is bent to open the gas discharge valve in a state where the broken line is broken. . The power supply device according to any one of claims 1 to 3,
A connecting cylinder to be inserted into the outlet of the gas exhaust valve is provided at the inlet opening of the exhaust duct, the connecting cylinder is inserted into the outlet, and the inlet opening of the exhaust duct is connected to the gas A power supply unit connected to the discharge port of the discharge valve. It is a power supply device described in Claim 4, Comprising:
The outer shape of the connecting tube is smaller than the inner shape of the discharge port of the gas discharge valve, and the connecting tube is inserted into the discharge port of the gas discharge valve, between the connecting tube and the discharge port, A power supply device comprising a gap for absorbing a dimensional error. The power supply device according to any one of claims 1 to 5,
An inflow opening of the exhaust duct is connected to an exhaust port of the gas exhaust valve via a sealing material. It is a power supply device described in Claim 6, Comprising:
The power supply device, wherein the sealing material is provided between a surface of the top plate and the discharge duct. The power supply device according to any one of claims 1 to 7,
The battery cell is a non-aqueous electrolyte secondary battery.

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