WO2023243821A1 - 가스 벤팅 장치, 이를 포함하는 배터리 모듈 및 배터리 팩 - Google Patents
가스 벤팅 장치, 이를 포함하는 배터리 모듈 및 배터리 팩 Download PDFInfo
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- WO2023243821A1 WO2023243821A1 PCT/KR2023/003983 KR2023003983W WO2023243821A1 WO 2023243821 A1 WO2023243821 A1 WO 2023243821A1 KR 2023003983 W KR2023003983 W KR 2023003983W WO 2023243821 A1 WO2023243821 A1 WO 2023243821A1
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- flow path
- gas
- cross
- bracket
- venting device
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Images
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/30—Arrangements for facilitating escape of gases
- H01M50/342—Non-re-sealable arrangements
- H01M50/3425—Non-re-sealable arrangements in the form of rupturable membranes or weakened parts, e.g. pierced with the aid of a sharp member
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/30—Arrangements for facilitating escape of gases
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/30—Arrangements for facilitating escape of gases
- H01M50/342—Non-re-sealable arrangements
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/30—Arrangements for facilitating escape of gases
- H01M50/35—Gas exhaust passages comprising elongated, tortuous or labyrinth-shaped exhaust passages
- H01M50/358—External gas exhaust passages located on the battery cover or case
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/30—Arrangements for facilitating escape of gases
- H01M50/35—Gas exhaust passages comprising elongated, tortuous or labyrinth-shaped exhaust passages
- H01M50/367—Internal gas exhaust passages forming part of the battery cover or case; Double cover vent systems
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Definitions
- the present invention relates to a gas venting device for discharging gas inside a battery module or battery pack.
- the present invention relates to a battery module and a battery pack including the gas venting device.
- Battery packs applied to electric vehicles, etc. have a structure in which multiple battery modules including a plurality of secondary batteries are connected in series or parallel to obtain high output.
- the secondary battery is capable of repeated charging and discharging through electrochemical reactions between components, including positive and negative electrode current collectors, separators, active materials, and electrolyte solutions.
- Secondary batteries may generate gas from the inside at any time during use while repeatedly charging and discharging, and this is called venting gas.
- venting gas For example, when overcurrent flows, the temperature of the internal secondary battery rises rapidly. This rapid increase in temperature may cause a decomposition reaction of the electrolyte and generate gas.
- gas When gas is generated from a secondary battery inside a battery pack, such gas may be trapped inside the pack, causing the battery pack to explode, or may flow into the interior of a vehicle, etc. through the cooling duct of the battery pack. Accordingly, the battery pack is equipped with a venting device that discharges the internal gas to the outside and reduces the internal pressure.
- Venting devices generally have a structure in which a venting disk that can rupture depending on internal pressure is inserted between an inlet through which gas flows into a battery module or battery pack and an outlet through which gas is discharged.
- Figure 1 is a perspective view showing an example of a conventional gas venting device
- Figure 2 is a schematic diagram showing a gas flow situation at the outlet of a conventional gas venting device.
- the conventional gas venting device 1 has the advantage of easy device design because the gas discharge passage 11 of the bracket 10 in communication with the venting disk 20 is designed to be simply cylindrical. there is.
- the conventional gas venting device 1 simply has a cylindrical structure in which the gas inlet 12 and the outlet 13 are connected, so the pressure between the inlet and the outlet is not large, allowing the gas to be discharged. There was a limit to the flow rate.
- the present invention was created to solve the above problems.
- the purpose of the present invention is to provide a gas venting device capable of discharging a higher flow rate per time even with a venting disk of the same area, and a battery module and battery pack including the same. do.
- the object is to provide a gas venting device that can increase the bursting pressure of the venting disk by eliminating the choking phenomenon at the outlet.
- the aim is to provide a gas venting device that increases safety and further improves flow stability by preventing the generation of shock waves at the outlet of the flow path.
- the gas venting device of the present invention for solving the above problems includes a hollow bracket member having a gas discharge passage; and a venting disk coupled to the bracket member to shield the gas discharge passage and configured to rupture when a predetermined pressure is applied, wherein the gas discharge passage has a passage cross-sectional area continuously or sequentially along the gas discharge direction. It includes a first flow path that decreases, and a second flow path that is formed consecutively to the first flow path and whose cross-sectional area of the flow path increases continuously or sequentially along the gas discharge direction.
- the venting disk may be installed in a throat portion that is a boundary between the first flow path and the second flow path.
- the first flow path and the second flow path may have the same or different lengths.
- the cross-sectional profiles of both sides of the first flow path are formed in a tapered shape that approaches each other in the gas discharge direction
- the cross-sectional profiles of both sides of the second flow path are formed in a tapered shape that moves away from each other in the gas discharge direction. can be formed.
- the slope of the tapered shape of the first flow path and the slope of the tapered shape of the second flow path may be the same or different.
- cross-sectional profiles of both sides of the first and second flow passages may be formed in a straight line or curved tapered shape.
- the first flow path has a first truncated cone shape in which the cross-sectional profiles of both sides are formed in a straight line or curved tapered shape
- the second flow path has a cross-sectional profile in both sides formed in a straight line or curved tapered shape. It may have a second truncated cone shape.
- the first flow path has a first truncated pyramid shape in which the cross-sectional profiles of both sides are formed in a tapered shape
- the second flow path has a second truncated pyramid shape in which the cross-sectional profiles of both sides are formed in a tapered shape.
- the first pyramid and the second pyramid may be in the shape of a square pyramid with a trapezoidal cross-sectional profile.
- a flow path having a straight cross-sectional profile on both sides may be connected to the inlet side of the first flow path.
- the bracket member may have a through hole
- the gas venting device may include an exhaust guide inserted into the through hole and through which the gas discharge passage is formed.
- the discharge guide includes a first discharge guide inserted into the aperture and having a first flow path formed through it, and a first discharge guide inserted into the aperture and having a second flow path formed through it, and the venting disk includes the It may be coupled between the first discharge guide and the second discharge guide to shield the gas discharge passage.
- a fastening portion for fastening the discharge guide to the bracket member may be formed on the outer peripheral surface of the discharge guide.
- the bracket member includes a first bracket located on the inlet side of the gas discharge passage and having the first passage, and a second bracket located on the outlet side of the gas discharge passage and having the second passage. It includes, and the venting disk may be coupled between the first bracket and the second bracket to shield the gas discharge passage.
- first bracket and the second bracket each have a through hole, and a first discharge guide through which a first flow path is formed is inserted into the through hole of the first bracket, and a second discharge guide is inserted into the through hole of the second bracket.
- a second discharge guide through which a flow path is formed may be inserted.
- venting disk includes an outer peripheral portion of the disk coupled to the bracket member
- an inner periphery of the disc that is formed as one body with the outer periphery of the disc and shields the gas discharge passage, but ruptures when a predetermined pressure is applied; It includes, and a notch may be formed on the inner periphery of the disc so that it ruptures when the predetermined pressure is applied.
- the present invention also provides a battery module including the gas venting device.
- the battery module includes a plurality of secondary batteries; And a module frame on which the secondary battery is mounted; It includes, and the above-described gas venting device may be coupled to one side of the module frame.
- the present invention also provides a battery pack including the gas venting device.
- the battery pack includes at least one battery module including a plurality of secondary batteries;
- a battery pack case on which the battery module is mounted It includes a gas venting device as described above may be coupled to one side of the battery pack case.
- the gas venting device according to the present invention and the battery module or battery pack including the same can improve the safety of the battery module and battery pack by discharging a greater flow rate per time even if a venting disk of the same area is used.
- the discharged gas is discharged at a high speed, and due to this high-speed flow inertia, shock waves can be generated far from the exit or the shock waves themselves can be prevented.
- the gas venting device of the present invention the battery module and battery pack including the same have the advantage of significantly improving safety even when events such as heat propagation occur.
- Figure 1 is a perspective view showing an example of a conventional gas venting device.
- Figure 2 is a schematic diagram showing the gas flow situation at the outlet of a conventional gas venting device.
- Figure 3 is a diagram showing an embodiment of the gas venting device of the present invention.
- FIG. 4 is a diagram showing the coupling structure of the venting disk and the bracket member in the gas venting device of FIG. 3.
- Figure 5 is a schematic diagram showing the gas flow situation at the outlet of the gas venting device of the present invention.
- Figure 6 is a diagram showing the shape of a flow path of a gas venting device according to an embodiment of the present invention.
- Figure 7 is a diagram showing the shape of a flow path of a gas venting device according to another embodiment of the present invention.
- Figure 8 is a diagram showing the shape of a flow path of a gas venting device according to another embodiment of the present invention.
- Figure 9 is a diagram showing a gas venting device according to another embodiment of the present invention.
- Figure 10 is a diagram showing a gas venting device according to another embodiment of the present invention.
- Figure 11 is a diagram showing a gas venting device according to another embodiment of the present invention.
- Figure 12 is a diagram showing the fastening structure of a gas venting device according to another embodiment of the present invention.
- Figure 13 is a perspective view showing the assembly structure of a gas venting device according to another embodiment of the present invention.
- Figure 14 is a schematic diagram showing the shape of a venting disk according to the present invention.
- Figure 15 is a schematic diagram showing the combined structure of a gas venting device in a battery module according to an embodiment of the present invention.
- Figure 16 is a schematic diagram showing the combined structure of a gas venting device in a battery module according to another embodiment of the present invention.
- the gas venting device of the present invention includes a hollow bracket member having a gas discharge passage; and a venting disk coupled to the bracket member to shield the gas discharge passage and configured to rupture when a predetermined pressure is applied, wherein the gas discharge passage has a passage cross-sectional area continuously or sequentially along the gas discharge direction. It includes a first flow path that decreases, and a second flow path that is formed consecutively to the first flow path and whose cross-sectional area of the flow path increases continuously or sequentially along the gas discharge direction.
- the present invention also provides a battery module including the gas venting device.
- the battery module includes a plurality of secondary batteries; And a module frame on which the secondary battery is mounted; It includes, and the above-described gas venting device may be coupled to one side of the module frame.
- the present invention also provides a battery pack including the gas venting device.
- the battery pack includes at least one battery module including a plurality of secondary batteries; and a battery pack case on which the battery module is mounted. It includes a gas venting device as described above may be coupled to one side of the battery pack case.
- Figure 3 is a diagram showing an embodiment of the gas venting device of the present invention
- Figure 4 is a diagram showing the coupling structure of the venting disk and the bracket member in the gas venting device of Figure 3
- Figure 5 is a diagram showing the gas venting device of the present invention. This is a schematic diagram showing the gas flow situation at the outlet.
- the gas venting device 100 includes a hollow bracket member 110 having a gas discharge passage 111; and a venting disk 120 coupled to the bracket member 110 to shield the gas discharge passage 111 and configured to rupture when a predetermined pressure is applied, wherein the gas discharge passage 111 is configured to rupture the gas discharge passage 111.
- a first flow path (111A) whose cross-sectional area continuously or sequentially decreases along the discharge direction, and a second flow path (111B) formed in succession to the first flow path and whose cross-sectional area of the flow path continuously or sequentially increases along the gas discharge direction. ) includes.
- the gas venting device 100 includes a hollow bracket member 110 having a gas discharge passage, and is coupled to the bracket member to shield the gas discharge passage, It includes a venting disk 120 configured to burst when a predetermined pressure is applied.
- FIG. 3(a) is a schematic cross-sectional view of the gas venting device 100
- FIG. 3(b) is a perspective view of the gas venting device 100.
- the bracket member 110 is formed in a hollow shape, so that the hollow space can directly form a gas discharge passage.
- another member eg, discharge guide
- the bracket member 110 has a through hole at approximately the center, and the through hole forms a gas discharge passage 111.
- the bracket member 110 is provided with a venting disk 120 that shields the gas discharge passage.
- the venting disk 1120 is made of a material that can rupture when a predetermined pressure is applied.
- it can be made of a ruptureable metal or plastic material.
- it can be made of a polymer material that can be thinned, such as vinyl or film.
- a notch may be provided on the venting disk area corresponding to the flow path to facilitate rupture.
- the predetermined pressure may be determined in consideration of the design situation of the cells within the battery module or battery pack and the degree of safety required. For example, if a flame occurs within the module or pack or exceeds a set high temperature and high pressure, the venting disk 120 may rupture. Alternatively, to increase safety, it is possible to design the venting disk to rupture at a relatively low set pressure, which is the pressure before an internal explosion occurs.
- the venting disk 120 is located on the gas discharge passage 111 and is coupled to the bracket member 110 to shield the gas discharge passage 111.
- the gas discharge passage 111 includes a first passage 111A whose cross-sectional area continuously or sequentially decreases along the gas discharge direction, and a first passage 111A formed sequentially in the first passage and having a cross-sectional area continuously along the gas discharge direction. Alternatively, it includes a second flow path 111B that increases sequentially.
- the present invention can discharge a large amount of gas by increasing the outlet flow rate, eliminating the chalking phenomenon, as described below, by forming two flow paths with different flow path cross-sectional areas in succession, and preventing the generation of shock waves to prevent the flow. Stability can be improved.
- a battery pack is equipped with a plurality of battery modules, and each battery module has a plurality of secondary batteries built in. As these secondary batteries are repeatedly charged and discharged, gas is generated due to a decomposition reaction of the electrolyte. The heat generated during the charging and discharging process of the battery promotes gas generation and expands the gas, increasing the pressure inside the battery module or battery pack. If this process continues, the battery module or battery pack may explode, or internal gas may flow into the interior of the vehicle through ducts, etc., so if the pressure of the gas exceeds a certain level, the venting disk ruptures and the gas is discharged. A venting device is attached.
- the conventional gas venting device simply has a cylindrical gas discharge passage in which the gas inlet and outlet are connected, so the pressure difference between the inlet and outlet is not large, so there is a limit to the flow rate of gas that can be discharged. There was.
- the gas discharge flow path 111 of the present invention includes a first flow path 111A whose cross-sectional area of the flow path continuously or sequentially decreases along the gas discharge direction, and a first flow path formed in succession along the gas discharge direction. It is provided with a second flow path (111B) whose cross-sectional area increases continuously or sequentially.
- the first flow path 111A with a reduced cross-sectional area of the present invention can increase the pressure difference at the inlet and outlet compared to a conventional cylindrical flow path, thereby increasing the gas discharge flow rate.
- the so-called chalking phenomenon may occur not only in conventional cylindrical flow paths but also in flow paths with a reduced cross-sectional area such as the first flow path.
- the gas in the subsonic section where the gas flow speed is below the speed of sound, the gas is considered to be a so-called incompressible gas, and the gas flow speed increases as the cross-sectional area of the gas discharge passage decreases.
- the gas flow speed at the outlet of the flow path cannot exceed the speed of sound according to physical laws.
- the present invention is provided with a second flow path (111B) whose cross-sectional area is increased.
- the gas After the outlet flow velocity of the first flow path (111A) reaches the speed of sound, when the cross-sectional area of the flow path increases again as in the second flow path (111B), the gas exhibits the behavior of a so-called compressible gas and, unlike the first flow path, the cross-sectional area of the flow path increases again. Accordingly, a supersonic flow occurs where the flow speed increases. That is, the gas flow rate that was stagnant at the outlet of the first flow path (111A) further increases as the cross-sectional area increases in the second flow path (111B), resulting in a flow exceeding the speed of sound.
- the present invention has the advantage of being able to alleviate or eliminate the generation of shock waves as in the prior art.
- shock waves are generated near the outlet. Shock waves are an irreversible loss of flow energy and are accompanied by a rapid increase in pressure behind the outlet. If the pressure on the outlet side increases in this way, the inlet and outlet pressure difference decreases, preventing gas discharge.
- the outlet flow speed is so large that it reaches supersonic speed, and due to this high-speed flow inertia, the shock wave is connected to the outlet 113. It occurs far away.
- the shock wave is connected to the outlet 113. It occurs far away.
- shock waves can be formed at a distance from the outlet.
- the intensity of the generated shock wave may be much smaller, as indicated by the dotted line in FIG. 5, or in some cases, it may be dissipated into the atmosphere without generating a shock wave.
- the bursting pressure of the venting disk can also be selected to be relatively high.
- the shape, length, cross-sectional area size, cross-sectional area change rate, etc. of the first flow path and the second flow path forming the gas discharge flow path of the present invention are determined by design specifications such as the type, number, and arrangement structure of the secondary cells installed in the battery module and battery pack. You can select it by changing it accordingly. In other words, the heat propagation situation, flame generation situation, temperature, and pressure that occur within the battery module or pack vary depending on the design specifications of the secondary battery. Additionally, it is necessary to consider the number and arrangement structure of battery modules installed inside the battery pack.
- the venting disk 120 is installed in the gas discharge passage 111 of the bracket member 110 to shield the gas discharge passage 111.
- the venting disk 120 can be installed in any part of the path between the first flow path and the second flow path.
- the venting disk can be installed in the most appropriate location by considering the pressure, flow rate, cross-sectional area, flow path shape, and ease of installation depending on the location of the gas discharge channel.
- the venting disk 120 can be installed in the throat portion T, which is the boundary between the first flow path 111A and the second flow path 111B.
- the throat portion (T) forms a cross-sectional area that changes from subsonic behavior to supersonic behavior, it is necessary to preferentially determine the cross-sectional area of this throat portion when designing the flow path.
- the area and burst pressure range of the venting disk can be designed relatively accurately by considering the cross-sectional area in the throat portion.
- the flow of the throat portion (T) is more stable than that of the inlet 112 or outlet 113 of the gas discharge passage, and design is performed based on this stable portion, thereby improving the design accuracy of the venting disk 120. There is an advantage in that it can be improved.
- the venting disk 120 can be installed at the entrance of the gas discharge passage, that is, at the inlet 112 of the first passage 111A.
- Installation at the 'inlet side' includes both installation at the inlet 112 of the first flow path 111A forming the gas discharge flow path 111 or installation at a portion adjacent to the inlet.
- the venting disk 120 is installed in this additional flow path.
- the venting disc can be effectively protected from external pressure.
- it is easy to protect important components such as secondary battery components and module components inside the venting disk.
- the shape of the above-mentioned throat portion is determined in the flow path shape, the total flow rate is not greatly affected by the inlet size, so it is easy to select the specifications of the venting disk installed at the inlet of the gas discharge flow path.
- the shape of the throat and flow path is determined within a range that can achieve the effect of increasing the flow rate due to pressure changes at the inlet and outlet, the area of the inlet and the size of the venting disk installed there can be appropriately designed. Therefore, installing a venting disk at the inlet has the advantage of increasing design freedom.
- the venting disk 120 can be installed at the outlet of the gas discharge passage, that is, on the outlet 113 side of the second passage 111B.
- venting disk is installed at the entrance to the flow path or in the throat, when the venting disk ruptures, the ruptured pieces may block the flow path or flow into the module, causing interference. If this happens, the flow stability of the flow path may be damaged. Installing a venting disk at the outlet of the flow path can reduce this risk and contribute to flow stability.
- venting disk Since the venting disk is located on the flow path outlet 113 side, there are no obstacles in the flow path from the inlet to the outlet side. Accordingly, after the gas flow in the gas discharge flow path is fully developed, the flow path is communicated with the outside, so the flow stability of the flow path is further improved, making it possible to stably discharge the exhaust gas.
- the venting disk 120 is the inlet of the first flow path (inlet 112 of the gas discharge flow path), the outlet of the second flow path (outlet 113 of the gas discharge flow path), or the outlet of the first flow path. It can be installed in the throat portion (T), which is the boundary between the inlet and the second flow passage. Of course, depending on the flow path design, the venting disk can be installed in other locations.
- the bracket member or the gas discharge passage is The shape needs to be processed separately.
- slots S1 and S2 into which the venting disk 120 is inserted may be formed in the body of the bracket member 110.
- a portion of the venting disk 120 may be inserted into and fixed to the insertion groove S2 across the throat of the gas discharge passage.
- venting disk 120 can be fixed to the bracket member 110 by the fastening member 140.
- the venting disk 120 when a venting disk is coupled to the throat portion, there may be a disadvantage that the shape or structure of the bracket member needs to be processed somewhat complicatedly, as described above.
- bracket members or discharge guides inserted into the bracket members are configured and a venting disk is fastened between the plurality of bracket members or the plurality of discharge guides, there is no need to complexly process the bracket member. .
- the length, shape, cross-sectional area size, and cross-sectional area change rate of the first flow path and the second flow path can be appropriately designed considering the design specifications of the secondary battery, battery module, and battery pack, safety requirements, and gas flow stability.
- FIGS. 6 to 8 are diagrams showing the flow path shape of a gas venting device according to various embodiments of the present invention.
- Figure 6(a) shows a flow path in which the cross-sectional profiles of both sides are straight
- Figure 6(b) shows a flow path in which the cross-sectional profiles of both sides are curved
- Figure 7(a) shows a flow path in which the cross-sectional profiles of both sides are curved and straight
- Figure 7(b) shows a flow path in which the cross-sectional profiles of both sides are straight and curved
- Figure 8(a) shows a flow path shape in which the cross-sectional profiles of both sides of the flow path are trapezoidal
- Figure 8(b) is a schematic perspective view showing the three-dimensional shape of this flow path, which is a pyramid shape.
- the overall length of the gas discharge passage can be determined by considering the gas discharge pressure, passage cross-sectional area, size of the module or pack, etc.
- the first flow path and the second flow path may be configured to have the same length. This case can be applied when the change in gas flow rate is relatively simple, and processing of the bracket member is easy.
- the length of the first passage 111A which is a subsonic section
- the length of the second passage 111B which is a supersonic section
- the cross-sectional area of the first flow path 111A continuously or sequentially decreases along the gas discharge direction.
- the cross-sectional profiles of both sides of the first passage 111A form a tapered shape that approaches each other toward the gas discharge direction.
- both sides of the flow path refer to both sides forming the inner circumferential wall of the flow path rather than the inlet and outlet sides forming the upper and lower parts of the flow path.
- the cross-sectional profiles of both sides of the second flow path 111B form a tapered shape that moves away from each other toward the gas discharge direction.
- the slope of the tapered cross-sectional profile of both sides may also be determined differently depending on the design goal. That is, when the flow change is relatively simple or the venting path is short, the slopes of the tapered shapes of the first and second flow paths can be set to be the same, as shown in FIGS. 3 and 4. On the other hand, because the flow mode is complex and from the viewpoint of preventing choking and shock waves, the slope of the tapered shape of the first flow path may be formed to be greater than the slope of the tapered shape of the second flow path, as shown in FIGS. 6 and 7.
- the cross-sectional profile of the both sides is not limited to a straight tapered shape but may include a curved tapered shape.
- the cross-sectional profiles of the first and second flow passages may both have a straight taper shape, or they may all have a curved taper shape as shown in FIG. 6(b).
- the cross-sectional profiles of both sides of the first flow path and the second flow path may be configured as a mixture of straight lines and curves. That is, as shown in FIG. 7(a), the cross-sectional profile of the first flow path can be configured as a curve and the cross-sectional profile of the second flow path can be configured as a straight line.
- the cross-sectional profiles of the first and second flow paths can be configured as straight lines and curves, as shown in FIG. 7(b).
- a cross-sectional profile may be configured in a form in which straight lines and curves are partially mixed within each of the first flow path and the second flow path.
- the cross-sectional area conditions of the overall flow path must be satisfied to continuously or sequentially decrease (first flow path) and increase (second flow path).
- the curvature of the curve may be set differently depending on each flow path, or may be set differently along the gas discharge direction even within one flow path.
- the curved tapered flow path in FIGS. 6 and 7 has a shape bent concavely from the center of the flow path toward the inner wall of the flow path, but on the contrary, it can also be composed of a curved flow path with a shape that protrudes convexly from the inner wall of the flow path toward the center of the flow path. possible.
- the cross-sectional profile of the flow path is only straight, it is simple and easy to manufacture, but when connected to other parts such as pipes, angled parts may occur on the walls of the flow path, which may cause some sections where the flow is unstable.
- the reduction rate of the cross-sectional area is constant, for example, if gas whose flow is unstable flows in at the entrance of the flow path, there is a high possibility that the flow instability of the gas will not be resolved and will remain until the outlet of the flow path.
- a flow path with a constant rate of decrease or increase in cross-sectional area has the disadvantage of reducing the degree of freedom to control flow instability within the flow path.
- the reduction rate of the cross-sectional area changes along the flow path (for example, the cross-sectional profiles on both sides are a mixture of straight lines and curves, or the curvatures of the curves are different), the above-mentioned flow instability occurs within the flow path.
- It has the advantage of being controllable and manageable. That is, when the shapes of the first and second flow paths 111A and 111B or the profiles of both sides are different as shown in FIG. 7, for example, even if the flow in the first flow path is unstable, the shape of the second flow path is appropriately designed to stabilize the flow. can do. In this way, by varying the shapes of the first and second flow paths or designing the shape or cross-sectional profile differently even within one flow path, the gas flow within the corresponding flow path can be adjusted, thereby increasing the degree of design freedom for controlling flow stability.'
- the degree of design freedom for controlling flow stability can be further increased.
- the gas discharge passage 111 may be designed to have a circular cross-sectional shape perpendicular to the gas discharge direction as shown in FIG. 4.
- the three-dimensional shape of the gas discharge passage 111 may be a truncated cone shape.
- the shape of the inlet 112 and the outlet 113 of the gas discharge passage 111 is circular, and each constitute a truncated cone-shaped lower and upper surface.
- the first flow path 111A of the gas discharge flow path 111 has the shape of a first truncated cone 111C in which cross-sectional profiles of both sides are formed in a straight or curved tapered shape.
- the second flow path 111B has a second truncated cone 111D shape in which cross-sectional profiles of both sides are formed in a straight or curved tapered shape.
- the gas discharge passage in FIG. 6 has a straight or curved cross-sectional profile on the outer peripheral surfaces of the first and second cones 111C and 111D that form the first and second passages, respectively.
- the gas discharge flow path of FIG. 7 has a cross-sectional profile of a curved (FIG. 7(a)) or straight line (FIG. 76(b)) outer peripheral surface of the first truncated cone 111C forming the first flow path, and a second
- the outer peripheral surface of the second truncated cone 111D forming the flow path has a cross-sectional profile of a straight line (FIG. 7(a)) or a curve (FIG. 7(b)).
- the cross-sectional shape perpendicular to the gas discharge direction is circular, and the first and second flow paths each form a truncated cone shape.
- the cross-sectional shape is not limited to circular, and may have a rectangular cross-sectional shape as shown in FIG. 8.
- the first flow path 111A has the shape of a first pyramid 111E in which the cross-sectional profiles of both sides are tapered
- the second flow path 111B has a tapered cross-sectional profile of both sides. It has the shape of a second truncated pyramid (111F).
- the first pyramid (111E) and the second pyramid (111F) have trapezoidal cross-sectional profiles at both sides of the passage.
- a gas discharge passage having such a rectangular cross-sectional shape can also be appropriately employed for design purposes or to control flow stability.
- the flow path whose cross-sectional shape perpendicular to the gas discharge direction is not circular but rectangular (square), that is, the three-dimensional shape of the flow path forms a pyramid has two sides of the same shape as Figures 6 and 7 in addition to Figure 8. It can also be applied to flow paths with a cross-sectional profile.
- a straight flow path 115 may be additionally formed inside the gas discharge flow path 111, that is, inside the first flow path 111A, if necessary.
- the straight flow path 115 is added in this way, the flow inside the gas venting device 100 can be stably guided toward the first flow path 111A.
- the straight flow path 115 is included inside the bracket member 110, it is easy to introduce a tool for processing the flow path into the inside of the bracket member 110, which can be advantageous in terms of ease of processing.
- the straight flow path 115 has a rectangular cross-sectional shape perpendicular to the gas discharge direction, but a circular flow path, that is, a cylindrical three-dimensional shape, is also possible.
- This straight flow path 115 can be applied to the inlet side of the truncated cone-shaped flow path of FIGS. 3 to 7 in addition to the truncated pyramid-shaped flow path shown in FIG. 8.
- FIG. 9 is a diagram showing a gas venting device 200 according to another embodiment of the present invention, where FIG. 9(a) is a schematic cross-sectional view and FIG. 9(b) is a discharge guide 130, which is a component of the gas venting device. ) is a schematic perspective view of
- the through hole of the bracket member 110 itself is formed as a gas discharge passage 111 including a first passage and a second passage.
- the purpose of the present invention is achieved by inserting the discharge guide 130 through which the gas discharge passage 131 is formed into the through hole of the bracket member 110. That is, in this embodiment, a gas discharge passage composed of the first passage and the second passage is formed through the discharge guide 130, and the discharge guide 130 is coupled to the through hole of the bracket member 110. A venting disk 120 is coupled to the gas discharge passage 131 of the discharge guide 130.
- the gas discharge flow path 131 of the discharge guide includes a first flow path 131A and a second truncated cone (131C) in the shape of a first truncated cone (131C) whose tapered cross-sectional profile directions on both sides are opposite to each other.
- the second flow path 131B in the shape 131D) is formed in succession.
- the discharge guide 130 has a detachable or replaceable structure. As such, in this embodiment, by using a separate discharge guide 130 equipped with a gas discharge passage 131 in the bracket member 110, gas discharge is smoothed, parts can be easily replaced, and the passage The shape can be easily changed.
- the venting disk 120 is coupled to the discharge guide 130, and the discharge guide 130 is coupled to the bracket member 110, so that the venting disk 120 is connected to the bracket. It takes the form of being coupled to the member 110.
- slots into which the venting disk can be inserted may be formed in the discharge guide, similar to the bracket member of FIGS. 3 and 4.
- FIG. 10 is a diagram showing a gas venting device 300 according to another embodiment of the present invention.
- FIG. 10(a) is a schematic cross-sectional view
- FIG. 10(b) is a discharge guide (a component of the gas venting device). This is a schematic perspective view of 130).
- the discharge guide 130 includes a first discharge guide 130A inserted into the through hole of the bracket member and having a first flow path 131A formed through it, and a first discharge guide 130A inserted into the through hole and having a second flow path 131B formed through it. It consists of 2 discharge guides (130B).
- the venting disk 120 is coupled between the first discharge guide 130A and the second discharge guide 130B to shield the gas discharge passage 131.
- the discharge guide 130 is composed of two discharge guides with different flow path shapes, the shape of each discharge guide is simple and processing of each guide is easy.
- the outer periphery of the venting disk 120 can be inserted and joined between the two discharge guides. For this reason, there is no need to machine a slot for inserting the venting disk 120 into the discharge guide 130, as in the embodiment of FIG. 9.
- the venting disk is fastened between the first discharge guide (130A) and the second discharge guide (130B), a larger coupling area can be secured between the venting disk and the discharge guide to increase coupling force.
- the first discharge guide 130A has a first flow path 131A in the shape of a first truncated cone 131C
- the second discharge guide 130B has a second flow path (131A) in the shape of a second truncated cone 131D.
- 131B is provided.
- the first and second cones form a gas discharge passage 131 integrally formed.
- the first and second cones form a divided gas discharge passage 131.
- the venting disk 120 is installed in the gas discharge passage, that is, the throat portion, between the first truncated cone shape and the second truncated cone shape.
- Figure 11 is a diagram of a gas venting device 400 according to another embodiment of the present invention.
- the bracket member 110 is divided into two to facilitate coupling of the venting disk 120 to the bracket member 110. That is, the bracket member includes a first bracket 110A located on the inlet 112 side of the gas discharge flow path and having the first flow path 111A, and a first bracket 110A on the outlet 113 side of the gas discharge flow path 11. It is located in and includes a second bracket (110B) having the second flow path (111B). Then, the venting disk is positioned between the first bracket (110A) and the second bracket (110B), and the first and second brackets and the venting disk (120) are fastened with the fastening member (140), thereby forming the venting disk. It can be easily coupled to the bracket member.
- the venting disk 120 is located between the first and second brackets 110A and 110B, and is naturally located at the throat portion, which is the boundary between the first flow path 111A and the second flow path 111B. . Accordingly, the rupture portion of the venting disk is located in the throat portion of the gas discharge passage where the pressure change is not large, making it possible to prevent unintentional rupture of the venting disk.
- the bracket member 110 is formed of a first bracket 110A having a first flow path 111A and a second bracket 110B having a second flow path 111B, respectively, as shown in FIGS.
- the bracket is easy to manufacture compared to machining both the first and second flow passages of complex shapes into a single bracket member as shown in FIG. 4.
- the first bracket (110A) is processed to have only the first flow path whose cross-sectional area decreases
- the second bracket (11B) need only be processed to have only the second flow path whose cross-sectional area increases, so the bracket processing work is simple. It becomes.
- the venting disk can be more stably and firmly coupled to the bracket member by contacting both sides of the venting disk with the opposing sides of the first bracket and the second bracket and fastening a fastening member to this contact portion.
- Figure 12 is a diagram showing the fastening structure of a gas venting device according to another embodiment of the present invention
- Figure 13 is a perspective view showing the assembly structure of the gas venting device according to another embodiment of the present invention.
- the bracket member 110 is formed of two first and second brackets 110A and 110B, as shown in FIG. 11, and also includes two discharge guides 130A and 110B, as shown in FIG. 10. 130B) was introduced.
- the bracket member 110 is composed of a first bracket 110A and a second bracket 110B each having a through hole, and a first flow path 131A is connected to the through hole of the first bracket 110A. ) is inserted through the first discharge guide (130A), and the second discharge guide (130B) through which the second flow path (131B) is formed is inserted into the through hole of the second bracket (110B).
- bracket member and the discharge guide are each divided, making machining of the parts easier and joining the venting disk even easier.
- the first discharge guide (130A) is coupled to the through hole of the first bracket (110A)
- the second discharge guide (130B) is coupled to the through hole of the second bracket (110B)
- the first and second brackets and the second discharge guide (130A) are coupled to the through hole of the first bracket (110A).
- the venting disk 120 is positioned between the 1 and 2 discharge guides and coupled with the fastening member 140, the venting disk can be stably coupled to the bracket member and the discharge guide with a larger coupling area.
- the venting disk, discharge guide, and bracket member are integrally fastened with one fastening member, the joining operation can be performed more simply.
- the discharge guide 130 may have a fastening portion 135 formed on its outer peripheral surface for fastening the discharge guide to the bracket member.
- first and second brackets 110A and 110B and the first and second discharge guides 130A and 130B may be fastened to each other using a fastening member 140 such as a bolt.
- a fastening member 140 such as a bolt.
- fastening portions 135 for fastening each discharge guide to each bracket 110A and 110B are formed protruding on the outer peripheral surface of the first and second discharge guides 130A and 130B. You can.
- first and second discharge guides (130A, 130B) must be respectively inserted into the through holes in the first and second brackets (110A, 110B), their cross sections have a shape corresponding to the shape of the through holes, and the fastening portion (135) is A plate-shaped protrusion may be formed along the outer periphery, protruding in a similar shape to the outer periphery of the venting disk 120.
- the fastening portion 135 may be formed on both the first discharge guide 130A and the second discharge guide 130B.
- the fastening part 135 is formed with fastening holes (not shown) for bolting together with the first and second brackets 110A and 110B.
- the fastening holes formed in the fastening part 135 are the first and second brackets 110A and 110B. It is formed at the same position as the fastening hole formed in the brackets 110A and 110B, and is fixed by inserting a bolt.
- the position where the fastening portion 135 is formed can be appropriately designed.
- the fastening portions 135 formed on the first discharge guide 130A and the second discharge guide 130B are connected between the first bracket 110A and the venting disk 120 and the second discharge guide 130B, respectively. It may be formed to be positioned between the bracket 110B and the venting disk 120.
- the position of the fastening part is not limited to this, and for example, the fastening part 135 may be formed to contact the other side of the surface where the first and second brackets 110A and 110B contact the venting disk 120.
- the fastening part of the discharge guide may be a screw-shaped fastening part formed along the outer peripheral surface.
- the first bracket 110A and the second bracket 110B and the first and second discharge guides 130A and 130B may be fastened using a screw fastening method. That is, threads 116 and 136 for screw fastening may be formed on the inner walls of the through holes of the first bracket 110A and the second bracket 110A and the outer peripheral surfaces of the first and second discharge guides 130A and 130B, respectively. Accordingly, the first bracket 110A and the second bracket 110A and the first and second discharge guides 130A and 130B may be fastened in the same manner as nuts and bolts, respectively.
- the screw thread may be formed in both the first discharge guide (130A) and the second discharge guide (130B).
- the discharge guide 130 is fastened to the brackets 110A and 110A by a screw fastening method
- the structure and fastening method of the parts are simplified, and the first and second discharge guides 140 are strongly attached to the bracket member 110. It can be fixed.
- a separate fastening member is required to fasten the first and second brackets and the venting disk placed between them.
- the shape of the gas discharge passage formed in the bracket member or discharge guide can be designed in various shapes according to the safety standards of the battery pack, etc.
- the cross-sectional area of the throat portion (T) of the gas discharge passages 111 and 131 may be appropriately selected depending on the structure of the battery module and battery pack or the safety conditions to be achieved, but the gas discharge passage inlet (the inlet of the first passage (112,132)) It may be 20% to 80% of the cross-sectional area. Specifically, the cross-sectional area of the throat portion may be 20% to 40%, or 40% to 60%, or 60% to 80%, and more specifically, 55 to 65% of the inlet cross-sectional area.
- the cross-sectional area of the outlet of the gas discharge flow path may be the same as or different from the inlet cross-sectional area.
- a pattern (not shown) to assist gas discharge may be formed on the inner walls of the gas discharge passages 111 and 131.
- the pattern may be in the form of threads, embossing, or a protrusion having a pattern of straight lines parallel to the gas discharge direction.
- the pattern may be in the form of a threaded protrusion that surrounds the inside of the flow path along the inner wall of the flow path.
- Figure 14 is a schematic diagram showing the shape of a venting disk according to the present invention.
- FIG. 14(a) shows a venting disk 120 inserted into a slot formed in the bracket member of FIGS. 3 and 4 or the discharge guide of FIG. 9, and FIG. 14(b) shows a plurality of venting disks 120 as shown in FIG. 12. The shape of the venting disk 120' fastened between the bracket and the discharge guide is shown.
- the venting disk 120 includes a disk outer peripheral portion 121 fastened to the bracket member 110; and an inner disk portion 122 that is formed as one body with the disk outer peripheral portion 121 and shields the through hole, but ruptures when a predetermined pressure is applied. Includes.
- An outer extension portion 125 is formed in the lower portion of the outer peripheral portion of the venting disk, and a fastening hole 123 is formed in this outer peripheral extension portion 125.
- the entire venting disk 120 is inserted into a slot formed in the bracket member (FIG. 4) or the discharge guide (FIG. 9), and at this time, a portion of the outer peripheral portion of the upper side of the venting disk is formed in the bracket member or discharge guide. It is inserted into a slot (insertion groove) on the inner wall of the gas discharge passage throat. Thereafter, the outer peripheral extension portion of the venting disk is coupled to the bracket member or discharge guide by a fastening member 140.
- the venting disk 120' of FIG. 14(b) includes a disk outer peripheral portion 121 fastened to the first bracket 110A and the second bracket 110B; and an inner disk portion 122 that is formed as one body with the disk outer peripheral portion 121 and shields the through hole, but ruptures when a predetermined pressure is applied. Includes.
- the venting disk 120' in FIG. 14(b) is disposed concentrically with the bracket member or discharge guide in the gas venting device.
- the disk inner peripheral portion 122 may be made of metal or plastic that can rupture when a predetermined pressure is applied.
- the disk inner peripheral portion 122 may be formed of a thin metal or plastic material such as copper, aluminum, or stainless steel.
- the disk inner peripheral portion 122 can be appropriately selected according to the pressure conditions at the time of rupture.
- the disk inner peripheral portion 122 blocks the bracket member or the through hole formed in the first bracket 110A and the second bracket 110B to prevent moisture or foreign substances from penetrating into the battery module or battery pack.
- the internal pressure increases, and this pressure acts as a force to rupture the inner peripheral portion of the disk 122.
- the pressure inside the battery module or battery pack is higher than the external air pressure, so the internal gas may be discharged to the outside of the battery module or battery pack due to negative pressure.
- a fastening hole 123 is formed in the circumferential direction of the disk outer peripheral portion 121 in Figure 14(b), so that the venting disk can be coupled to the bracket member as a fastening member through the corresponding fastening hole of the bracket member.
- a notch 124 is formed on the inner peripheral portion of the disc 122 so that it ruptures when a predetermined pressure is applied.
- This notch 124 is formed by partially cutting the surface of the venting disk 130 in the thickness direction.
- the shape of the notch 124 can be designed into a cross-shaped, round-square, U-shaped, oval-shaped, or arc-shaped shape, and the cross-section of the notch 124 can be shaped like a trapezoid, V-shaped, square, or arc-shaped.
- the shape of the notch 124 formed on the inner peripheral portion of the disk 122 is not necessarily limited to this and may have various shapes.
- the shape of the notch 124 may be X-shaped as shown in FIG. 14.
- the ruptured pieces of the inner peripheral portion of the disk 122 do not completely fall off and may be coupled to the outer peripheral portion of the disk 121. If the ruptured piece of the inner disc is completely separated from the venting disc, it is difficult to remove and may damage other parts.
- a disk pad (not shown) is disposed between the first bracket 110 and the venting disk 130 and between the second bracket 120 and the venting disk 130. It can be.
- This disk pad has a shape corresponding to the outer peripheral portion of the disk 131 and may be provided in an annular or ring shape.
- the disk pad is used to increase airtightness between the first bracket 110 and the venting disk 130 or between the second bracket 120 and the venting disk 130 and to prevent damage to the outer peripheral portion of the disk 132.
- the disc pad may be made of an elastic rubber material.
- the present invention provides a battery module including the gas venting device described above.
- Figure 15 is a schematic diagram showing the coupling structure of the gas venting device in the battery module 1000 according to an embodiment of the present invention
- Figure 16 is a schematic diagram showing the coupling structure of the gas venting device in the battery module 2000 according to another embodiment of the present invention. This is a schematic diagram showing the structure.
- battery modules 1000 and 2000 include a plurality of secondary batteries (not shown); and module frames (1100, 2100) on which the secondary batteries are mounted; It includes a structure in which a gas venting device (500, 600) is fastened to one side of the module frame (1100, 2100).
- the secondary battery has an electrode assembly in which an anode, a cathode, and a separator are alternately stacked together with an electrolyte solution in a cell case. Since the configuration of this secondary battery is obvious to those skilled in the art to which the present invention pertains, a more detailed description will be omitted.
- the gas venting devices 500 and 600 may be fastened with the first bracket 110A or the second bracket 110B in contact with the module frame 1100, as shown in FIG. 15.
- a gas venting device with two separate brackets and two discharge guides is shown fastened to the module frame.
- gas venting devices of other embodiments described above in which a single bracket member and an exhaust guide, or a single bracket member and a separate exhaust guide are applied can also be coupled to the module frame.
- the first bracket 110A is fastened in contact with the outer surface of the module frame 1100 as shown in FIG. 15(a), or the second bracket 110B is attached to the module frame 1100 as shown in FIG. 15(b). It is concluded in a state of contact with the inner world.
- the inner surface of the module frame 1100 refers to the surface facing the internal space where the secondary battery is mounted in the module frame 1100
- the outer surface refers to the surface exposed to the outside of the module frame 1100.
- fastening holes formed in fastening portions (not shown) of the first bracket 110A, the second bracket 110A, and the first and second discharge guides 130A and 130B are fastened to the venting disk 120.
- a hole corresponding to the hole (bolt through hole) is formed, so that the first bracket (110A), the venting disk (120), the first and second discharge guides (130A, 130B), and the second bracket (110B) are connected with one bolt. It can be fixed to the module frame 1100 through fastening. Furthermore, the module frame 1100 has a hole of a size corresponding to the through hole formed in the first and second brackets 110A and 110B or the inlet of the gas discharge passage 131 formed in the first and second discharge guides 130A and 130B. As this is formed, gas generated within the module can be discharged.
- the gas venting devices 500 and 600 are fastened with the module frame 2100 interposed between the first bracket 110A and the second bracket 110B. You can. Specifically, as shown in FIG. 16, the first bracket 110A of the gas venting device is in contact with the inner surface of the module frame 2100, and the second bracket 110B can be fastened in contact with the outer surface of the module frame 2100. . At this time, the venting disk 120 may be fastened between the first bracket 110A and the module frame 2100 or between the second bracket 110B and the module frame 2100. When a fastening part is formed on the discharge guide, the venting disk is located between the fastening part and the module frame.
- the battery module 2000 may further include a sealing member (not shown) that seals between the module frame 2100 and the outer periphery of the gas venting devices 500 and 600.
- the sealing member may be a rubber ring or silicone resin, and may be installed in the gap between the gas venting device and the module frame to seal the battery module.
- the present invention provides a battery pack including the gas venting device described above.
- a battery pack according to the present invention includes at least one battery module including a plurality of secondary batteries; and a battery pack case on which the battery module is mounted. It includes, and a gas venting device as described above may be fastened to one side of the battery pack case.
- the gas venting device can be fastened to the battery pack case in the same manner as the combination of the module frame and the gas venting device described above.
- the battery pack may include a sealing member that seals between the battery pack case and the outer periphery of the gas venting device.
- the gas venting device according to the present invention, the battery module and the battery pack equipped with the same have a sealed interior, and when the internal pressure exceeds the standard value, the venting disk ruptures and the gas inside the battery pack is discharged to the outside. do.
- the present invention adopts two consecutive flow paths in which the cross-sectional area of the gas discharge flow path continuously or sequentially decreases in the gas discharge direction and then increases again. Accordingly, it is possible to overcome the conventional limitation of the choking phenomenon occurring when the outlet flow velocity is only subsonic, and to discharge a larger flow rate of gas by setting the outlet flow velocity of the gas discharge passage to supersonic speed or higher.
- the gas flow stability at the outlet is greatly improved, and the generation of shock waves can be reduced or prevented.
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Abstract
Description
Claims (19)
- 가스 배출 유로를 가지는 중공형의 브라켓 부재; 및상기 브라켓 부재에 결합되어 상기 가스 배출 유로를 차폐하고, 소정의 압력이 가해질 경우 파열되도록 구성된 벤팅 디스크;를 포함하며,상기 가스 배출 유로는,가스 배출 방향을 따라 유로 단면적이 연속적으로 또는 순차적으로 감소하는 제1 유로와,상기 제1 유로에 연이어 형성되고 가스 배출 방향을 따라 유로 단면적이 연속적으로 또는 순차적으로 증가하는 제2 유로를 포함하는 가스 벤팅 장치.
- 제1항에 있어서,상기 벤팅 디스크는, 상기 제1 유로와 제2 유로의 경계부인 스로트부(throat portion)에 설치되는 가스 벤팅 장치.
- 제1항에 있어서,상기 제1 유로와 제2 유로는 길이가 동일 또는 상이한 가스 벤팅 장치.
- 제1항에 있어서,상기 제1 유로의 양측부의 단면(斷面) 프로파일은, 가스 배출 방향을 향하여 서로 접근하는 테이퍼 형상으로 형성되고,상기 제2 유로의 양측부의 단면 프로파일은, 가스 배출 방향을 향하여 서로 멀어지는 테이퍼 형상으로 형성되는 가스 벤팅 장치.
- 제4항에 있어서,상기 제1 유로의 테이퍼 형상의 기울기와 상기 제2 유로의 테이퍼 형상의 기울기는 동일 또는 상이한 가스 벤팅 장치.
- 제4항에 있어서,상기 제1 및 제2 유로의 양측부의 단면 프로파일은 직선 또는 곡선의 테이퍼 형상으로 형성되는 가스 벤팅 장치.
- 제6항에 있어서,상기 제1 유로는, 양측부의 단면 프로파일이 직선 또는 곡선의 테이퍼 형상으로 형성되는 제1 원추대 형상을 가지고,상기 제2 유로는, 양측부의 단면 프로파일이 직선 또는 곡선의 테이퍼 형상으로 형성되는 제2 원추대 형상을 가지는 가스 벤팅 장치.
- 제4항에 있어서,상기 제1 유로는, 양측부의 단면 프로파일이 테이퍼 형상으로 형성되는 제1 각뿔대 형상을 가지고,상기 제2 유로는, 양측부의 단면 프로파일이 테이퍼 형상으로 형성되는 제2 각뿔대 형상을 가지는 가스 벤팅 장치.
- 제8항에 있어서,상기 제1 각뿔대 및 제2 각뿔대는 단면 프로파일이 사다리꼴인 사각뿔대 형상인 가스 벤팅 장치.
- 제1항에 있어서,상기 제1 유로의 입구 측에 양측부의 단면 프로파일이 직선형인 유로가 연결되는 가스 벤팅 장치.
- 제1항에 있어서,상기 브라켓 부재는 통공을 구비하고,상기 통공 내에 삽입되며 상기 가스 배출 유로가 관통 형성된 배출 가이드를 포함하는 가스 벤팅 장치.
- 제11항에 있어서,상기 배출 가이드는, 상기 통공 내에 삽입되며 제1 유로가 관통 형성된 제1 배출 가이드와, 상기 통공 내에 삽입되며 제2 유로가 관통 형성된 제1 배출 가이드를 포함하고,상기 벤팅 디스크는 상기 제1 배출 가이드와 제2 배출 가이드 사이에 결합되어 상기 가스 배출 유로를 차폐하는 가스 벤팅 장치.
- 제11항에 있어서,상기 배출 가이드의 외주면에 상기 배출 가이드를 상기 브라켓 부재에 체결하기 위한 체결부가 형성되는 가스 벤팅 장치.
- 제1항에 있어서,상기 브라켓 부재는,상기 가스 배출 유로의 입구 측에 위치하며 상기 제1 유로를 가지는 제1 브라켓과,상기 가스 배출 유로의 출구 측에 위치하며 상기 제2 유로를 가지는 제2 브라켓을 포함하고,상기 벤팅 디스크는 상기 제1 브라켓과 제2 브라켓 사이에 결합되어 상기 가스 배출 유로를 차폐하는 가스 벤팅 장치.
- 제14항에 있어서,상기 제1 브라켓 및 제2 브라켓은 각각 통공을 구비하며,상기 제1 브라켓의 통공에는 제1 유로가 관통 형성된 제1 배출 가이드가 삽입되고,상기 제2 브라켓의 통공에는 제2 유로가 관통 형성된 제2 배출 가이드가 삽입되는 가스 벤팅 장치.
- 제1항에 있어서,상기 벤팅 디스크는,상기 브라켓 부재에 결합되는 디스크 외주부; 및상기 디스크 외주부와 한 몸체로 형성되고, 상기 가스 배출 유로를 차폐하되, 소정의 압력이 가해질 경우 파열되는 디스크 내주부; 를 포함하며,상기 디스크 내주부에는 상기 소정의 압력이 가해지면 파열되도록 노치가 형성되어 있는 가스 벤팅 장치.
- 복수의 이차전지; 및상기 이차전지가 탑재되는 모듈 프레임; 을 포함하며,상기 모듈 프레임의 일측에 제1항 내지 제16항 중 어느 한 항에 따른 가스 벤팅 장치가 결합되는 배터리 모듈.
- 제17항에 있어서,상기 모듈 프레임과 가스 벤팅 장치의 외주변 사이를 밀폐시키는 실링 부재를 더 포함하는 배터리 모듈.
- 복수의 이차전지를 구비하는 적어도 한 개의 배터리 모듈; 및상기 배터리 모듈이 탑재되는 배터리 팩 케이스; 를 포함하며,상기 배터리 팩 케이스의 일측에 제1항 내지 제16항 중 어느 한 항에 따른 가스 벤팅 장치가 결합된 배터리 팩.
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US18/577,520 US20240339716A1 (en) | 2022-06-14 | 2023-03-24 | Gas Venting Device, and Battery Module and Battery Pack Comprising Same |
EP23824051.9A EP4350869A1 (en) | 2022-06-14 | 2023-03-24 | Gas venting device, and battery module and battery pack comprising same |
CN202380012829.0A CN117693857A (zh) | 2022-06-14 | 2023-03-24 | 排气装置和包括该排气装置的电池模块和电池组 |
JP2024502168A JP2024526789A (ja) | 2022-06-14 | 2023-03-24 | ガスベンティング装置、それを含むバッテリーモジュールおよびバッテリーパック |
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KR1020220072178A KR20230171701A (ko) | 2022-06-14 | 2022-06-14 | 가스 벤팅 장치, 이를 포함하는 배터리 모듈 및 배터리 팩 |
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KR (1) | KR20230171701A (ko) |
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JP2013187530A (ja) * | 2012-03-08 | 2013-09-19 | Mutsuki Denki Kk | 密閉型電気化学デバイス用防爆弁 |
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KR20180039986A (ko) | 2016-10-11 | 2018-04-19 | 주식회사 엘지화학 | 배터리 팩 |
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KR20210139453A (ko) * | 2019-04-08 | 2021-11-22 | 노르마 저머니 게엠베하 | 제트 펌프 |
KR20220072178A (ko) | 2020-11-25 | 2022-06-02 | (주)포스코케미칼 | 배향성 구조를 갖는 리튬전지용 양극활물질 및 이의 제조방법 |
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2022
- 2022-06-14 KR KR1020220072178A patent/KR20230171701A/ko unknown
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2023
- 2023-03-24 CN CN202380012829.0A patent/CN117693857A/zh active Pending
- 2023-03-24 EP EP23824051.9A patent/EP4350869A1/en active Pending
- 2023-03-24 WO PCT/KR2023/003983 patent/WO2023243821A1/ko active Application Filing
- 2023-03-24 JP JP2024502168A patent/JP2024526789A/ja active Pending
- 2023-03-24 US US18/577,520 patent/US20240339716A1/en active Pending
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EP4350869A1 (en) | 2024-04-10 |
KR20230171701A (ko) | 2023-12-21 |
JP2024526789A (ja) | 2024-07-19 |
US20240339716A1 (en) | 2024-10-10 |
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