Battery device including a flame-retardant sealing material

Abstract

A battery device (1) is provided. The battery device (1) includes a casing (10) and a battery cell pack (20) disposed within the casing (10). The battery device (1) further includes a flame-retardant sealant (30) disposed within the casing (10) and around the battery cell pack (20) to isolate the casing (10) from the battery cell pack (20). The sealant (30) forms an envelope with an outlet (31) coupled to a ventilation space for ventilation of gases and / or heat generated in the event of a failure of the battery cell pack (20).

Description

Technical Field

[0001] The present invention relates to a battery device including a flame-retardant sealing material for protecting the facilities of the battery device.

Background Art

[0002] In recent years, the demand for battery devices has been rapidly growing worldwide. Efficient batteries are needed as backup solutions for vehicles, mobile devices, and to support functions required in the event of power outages or blackouts.

[0003] When a significant malfunction occurs in the battery cell pack located within the battery device, the battery cell pack can enter thermal runaway. In this state, combustion gases and flames are generated within the battery cell pack, which can successively affect other elements of the battery device. Combustion gases or flames resulting from the thermal runaway of the battery cell pack can lead to ignition or explosion of the battery cell pack or the entire device. Furthermore, there is also an interest in protecting the facilities adjacent to the battery device. Therefore, it may be interesting to provide a battery device that protects the elements of the battery device from a malfunctioning battery cell pack and / or reduces the risk of fire propagation from the battery device to the facilities adjacent to the battery device.

Summary of the Invention

[0004] An object of the present disclosure is to provide a battery device capable of thermally insulating a battery cell pack from the battery device. Providing to seal combustion gases and flames in the event of a failure of the battery cell pack is a further object of the present disclosure.

[0005] To achieve at least one of these objects and other objects, a battery device according to the independent claims is provided. Preferred embodiments are defined by the dependent claims.

[0006] According to a first aspect, a battery device is provided. The battery device may include a casing, a battery cell pack disposed within the casing, and a flame retardant sealant. The flame retardant sealant may be disposed within the casing so as to isolate the casing from the battery cell pack and may be disposed around the battery cell pack. The sealant may form an envelope. The envelope may include an outlet coupled to a ventilation space for ventilating gas and / or heat generated upon failure of the battery cell pack.

[0007] The battery cell pack may include a plurality of battery cells. The battery cell pack may also be referred to as a cell pack or an assembly of battery cells. Further, the term "casing" may further mean, for example, a housing, a chassis, a frame, a casing, or a body.

[0008] The sealant may include a flame retardant, such as a chemical substance and / or a compound, which can enhance the flame retardancy of the sealant. The flame retardant may be activated by the presence of an ignition source and is intended to prevent or slow down further progression of ignition.

[0009] Further, the term "flame retardant" may further mean, for example, high temperature resistance. The flame retardant sealant may be able to withstand a temperature of at least 1500 °C for at least 300 seconds.

[0010] Failure of the battery cell pack may be understood, for example, as thermal runaway of the battery cell pack or at least one of the battery cells within the battery cell pack, and / or ignition of at least one of the battery cells within the battery cell pack or by at least one of the battery cells. The failure may raise the temperature and / or pressure within the sealant. The increase in pressure within the sealant may be caused by heat propagation and / or the presence of combustion smoke and gas.

[0011] The fire-resistant sealing material may include a fire-resistant and / or high-temperature-resistant fabric. The fabric may include fire-resistant chemicals and / or compounds. Generally, the sealing material may also be referred to as a fabric sealing material.

[0012] The casing may include a vent. The vent may be disposed through the side of the casing. The outlet may be coupled to the ventilation space via the vent.

[0013] The term "vent" further means, for example, a duct, an exit, an outlet, and / or an opening.

[0014] Furthermore, in the context of the present disclosure, the casing may comprise a top, a bottom, and several sides. The number of sides may be any number, for example, 1, 3, 4, or more, depending on the shape of the casing. However, the casing may most often have six faces (a top, a bottom, a front, a back, and two sides). Thus, the side of the casing may be the front or the back of the casing.

[0015] The outlet may be airtight coupled to the vent. The outlet may be substantially airtight coupled to the vent.

[0016] The term "airtight coupled" means, for example, that combustion smoke and gas, and flames do not exit through the joint. Furthermore, the outlet may be coupled to the vent such that combustion smoke and gas, and flames can only exit the envelope through the vent.

[0017] The ventilation space may include a ventilation bag. The ventilation bag may be coupled to the outlet via the vent.

[0018] In some embodiments, the ventilation bag may be disposed outside the casing. The ventilation bag may be airtight coupled to the outlet and / or the vent.

[0019] Furthermore, the outlet can be coupled to the ventilation bag such that combustion smoke and gases, and flames, can only exit from the envelope into the ventilation bag. The ventilation bag can be configured to release air. Furthermore, the ventilation bag can be configured to prevent combustion smoke and gases, and flames, from exiting the ventilation bag. The ventilation bag can be coupled to the outlet via a vent.

[0020] The ventilation bag may be inflatable. In a steady state (or before any thermal runaway occurs), the ventilation bag can be arranged in a non-inflated state. The ventilation bag can be arranged, for example, outside the casing in a non-inflated state. Ventilation in the non-inflated state can correspond to a ventilation bag in a folded and / or compressed state.

[0021] The ventilation bag can be configured to inflate upon failure of the battery cell pack. The ventilation bag can be configured to inflate from a non-inflated state to an inflated state upon failure of the battery cell pack. The pressure increase in the sealant due to the failure can cause the inflation of the ventilation bag. However, the heated air and / or combustion smoke and gases generated by the failure can be discharged from the envelope via the vent. Thereby, the ventilation bag is inflated. The pressure of the envelope and / or the ventilation bag can be maintained substantially the same such that the ventilation bag inflates.

[0022] The ventilation bag can be arranged in a compartment on the side of the casing. The compartment can be attached to the side of the casing. Furthermore, the compartment can be pivotally attached to the side of the casing. Furthermore, the compartment may be attached to the ventilation bag. The compartment can be arranged at the vent of the casing.

[0023] The compartment can be configured to open upon failure of the battery cell pack. The compartment may be configured to open by pressure due to failure of the battery cell pack. Further, the compartment can be pushed by the ventilation bag as the ventilation bag inflates, and thereby can be opened by the ventilation bag.

[0024] The ventilation space can include an inflatable ventilation bag. In some embodiments, the inflatable ventilation bag can be coupled to the outlet and disposed within the casing. The ventilation bag may be in a non-inflated state within the casing before thermal runaway occurs. The ventilation bag can be configured to inflate upon failure of the battery cell pack. Thus, the inflatable ventilation bag can be configured to inflate within the casing. Further, the inflatable ventilation bag can be disposed between the battery cell pack and a vent or opening of the casing. The ventilation bag can be configured to inflate outside the casing through the vent or opening of the casing such that the ventilation bag is in an inflated state.

[0025] The side surface of the casing can be configured to open upon inflation of the ventilation bag so that the ventilation bag can inflate outside the casing. The side surface of the casing can be pivotally attached to another side surface or the remaining portion of the casing. The side surface of the casing configured to open can be attached to another side surface by pivoting means (or pivoting element). The side surface of the casing configured to open can be closed when the ventilation bag is in a non-inflated state.

[0026] The casing may comprise a locking member configured to maintain the side surface of the casing configured to open and close. The locking member may be configured to release the side surface of the casing configured to open by the pressure generated by the inflation of the ventilation bag. The locking member may be configured as, for example, a pin, a bump, a protrusion, or a depression. The side surface, bottom surface, or top surface of the casing may comprise one or more depressions or protrusions corresponding to the locking member so that when the side surface configured to open is in the closed position, the depressions or protrusions on the side surface, bottom surface, or top surface can lock together with the locking member. Accordingly, the ventilation bag may begin to inflate within the casing. As the ventilation bag continues to inflate, the pressure within the casing rises to a magnitude sufficient to release the engagement of the locking member, thereby allowing the side surface configured to open to open.

[0027] The ventilation bag may comprise a flame-retardant and / or high-temperature resistant fabric. The ventilation bag may comprise a flame retardant, such as a chemical substance and / or compound that can enhance the flame retardancy of the ventilation bag. The ventilation bag may be able to withstand a temperature of at least 1500 °C for at least 300 seconds. The sealing material and the ventilation bag may comprise the same material(s). Further, the sealing material and the ventilation bag may be formed together. In other words, the sealing material and the ventilation bag may be composed of the same fabric(s).

[0028] Note that other embodiments may be envisioned that use all possible combinations of the features recited in the above embodiments. Accordingly, the present disclosure also relates to all possible combinations of the features mentioned herein.

Brief Description of the Drawings

[0029] Exemplary embodiments of the present invention will be described below with reference to the accompanying drawings.

[0030]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

[0031] All the figures are schematic diagrams and are not necessarily to scale. Generally, only the parts necessary for explaining the embodiments of the present invention are shown. Other parts are omitted or merely suggested. The same reference numerals indicate the same elements throughout.

DETAILED DESCRIPTION OF THE INVENTION

[0032] Hereinafter, the present invention will be described with reference to the accompanying drawings showing exemplary embodiments. However, the concept of the present invention can be embodied in many different forms and should not be construed as being limited to the embodiments described herein. Rather, these embodiments are provided as examples so that this disclosure will explain the scope of the present invention to those skilled in the art. In the drawings, unless otherwise specified, the same reference numerals indicate the same or similar components having the same or similar functions.

[0033] FIG. 1 is a schematic view of a battery device 1 according to one or more exemplary embodiments.

[0034] The battery device 1 shown in Fig. 1 includes a casing 10. The casing 10 shown in Fig. 1 is a rectangular parallelepiped with equal width and length. The height of the rectangular parallelepiped-shaped casing 10 is smaller than the width and length of the casing 10. However, the concept of the present invention is not limited to the casing 10 configured in the shape shown in Fig. 1. For example, the casing 10 may have any geometric three-dimensional (3D) shape.

[0035] The battery device 1 further includes a battery cell pack 20. The battery cell pack 20 is disposed within the casing 10. For illustrative purposes, the battery cell pack 20 shown in Fig. 1 has substantially the same shape as the casing 10. However, the battery cell pack may have other shapes depending on the number and / or arrangement of the battery cells of the battery cell pack.

[0036] The casing 10 includes a vent 13 disposed through the back (or rear) surface 10a of the casing. The vent 13 shown in Fig. 1 is formed by a hole in the side surface 10a of the casing 10 and a tubular pipe attached to the hole. It will be understood that the vent 13 may be disposed on any side, front, rear, top or bottom surface of the casing 10. Further, the vent 13 is not limited to being formed as a tube or pipe. For example, the vent 13 may be configured as a hole in the side, front, rear, top or bottom surface of the casing 10. Further, the shape of the pipe of the vent 13 may be square, circular, or triangular. In addition, the vent 13 may include only the hole passing through the side surface of the casing 10.

[0037] In some variations, the casing 10 may further include an inlet 11 disposed on another side (e.g., the back side) of the casing 10. The inlet 11 is configured as a channel disposed through the side surface of the casing 10. The battery device 1 shown in FIG. 1 may include, for example, a cable or wire disposed through an inlet (or channel) 11 for electrically coupling the battery cell pack 20 to another device or system. By way of example, the battery device 1 may be used as a backup battery for a base station in a telecommunications system. Thus, the battery device 1 may be electrically coupled to a power source (e.g., a main power source) for charging the cells of the battery cell pack (charging mode of the battery device), and to a device of the base station for supplying power (discharging mode of the battery device).

[0038] However, the concept of the present invention is not limited to a battery device having an inlet 11 as shown in FIG. 1. The electrical connection to the battery cell pack may be provided by other means.

[0039] The battery device 1 further includes a flame retardant sealant 30. The sealant 30 is located within the casing 10 and is disposed around the battery cell pack 20 to isolate the battery cell pack 20 from the casing 10. The sealant 30 forms an envelope around the battery cell pack 20. The envelope includes an outlet 31 coupled to a ventilation space for ventilation of gases and / or heat generated in the event of a failure of the battery cell pack 20.

[0040] Furthermore, the battery cell pack 20 and the sealant 30 may be disposed tightly within the casing 10. Generally, the battery cell pack 20 and the sealant 30 may be designed to fit tightly inside the casing 10. In the embodiment shown in FIG. 1, the battery cell pack 20 and the sealant 30 may be disposed inside the casing 10 so as to fit snugly in all directions without requiring space against the walls / sides of the casing 10.

[0041] In some embodiments, the sealing material 30 can contact both the casing 10 and the battery cell pack 20. Further, the battery cell pack 20 can be placed at the bottom of the casing 10 with the sealing material 30 disposed therebetween. In other words, the battery cell pack can be disposed in the casing 10 without requiring a support structure, i.e., without requiring an opening in the sealing material 30 to dispose the battery cell pack 20 inside the casing 10.

[0042] The outlet 31 of the sealing material 30 shown in FIG. 1 is further coupled to the vent 13. The outlet 31 can be coupled to the hole of the vent 13, or can be coupled to the pipe of the vent 13 through the hole, or can be coupled through the hole and the pipe of the vent 13.

[0043] The ventilation space can be, for example, a space away from the battery device 1, or can be a space outside the casing 10. For example, the vent 13 can be coupled to a ventilation space at a position further away from the battery device 1 via an auxiliary pipe.

[0044] The couplings or electrical connections used for power supply to and from the battery cell pack of the battery device can be separated by separating the casing 10 from the couplings or electrical connections. The sealing material 30 can be formed, for example, around the couplings or electrical connections. Further, the sealing material 30 can be formed or attached, for example, around the couplings or electrical connections at the opening of the inlet 11 on the inner surface of the casing 10 or the battery cell pack 20.

[0045] The sealing material 30 can be fitted around a joint or an electrical connection, for example, so as to prevent the propagation of flames. For example, the sealing material 30 fits tightly around a joint or an electrical connection. In addition, the sealing material 30 can be fitted around a joint or an electrical connection by means of clamping means or a clamping element. The terms "clamping means" or "clamping element" mean, for example, a hose clip, a hose clamp, a snap grip, an O-clip, a cable tie, or a flame-retardant adhesive, and / or a sealant. Furthermore, a plurality of clamping means or clamping elements may be used.

[0046] Figure 2 is a schematic cross-sectional view of a battery device 1 according to one or more exemplary embodiments.

[0047] The battery device described with reference to Figure 2 may include features, elements, and / or functions corresponding to the battery device described with reference to Figure 1. Figure 2 is provided for a further understanding of the battery device 1 according to some embodiments. The same reference numerals in Figures 1 and 2 indicate the same or similar components having the same or similar functions.

[0048] The cross-section of the battery device 1 shown in Figure 2 is along a horizontal plane perpendicular to the longitudinal axis of the battery device 1 and is viewed from above. The battery device 1 in Figure 2 shows a casing 10 and a flame-retardant sealing material 30 disposed within the casing and around the battery cell pack 20. In the embodiment shown in Figure 2, there is a gap between the inner surface of the casing 10 and the sealing material 30. Furthermore, in the embodiment shown in Figure 2, there is also a gap between the sealing material 30 and the battery cell pack 20. However, the concept of the present invention is not limited to the presence of gaps between the casing 10 and the sealing material 30 and / or between the sealing material 30 and the battery cell pack 20. For example, the sealing material 30 may be disposed adjacent to either or both of the casing 10 and / or the battery cell pack 20.

[0049] The casing 10 includes a vent 13 in the form of a pipe arranged through the side surface of the casing. The sealing material 30 comprises an outlet 31 coupled to the ventilation space via the vent 13.

[0050] In the embodiment shown in FIG. 2, the casing 10 further includes an inlet 11 arranged on the side surface of the casing 10 opposite to the side surface of the casing 10 including the vent 13. The battery cell pack 20 may include electrical coupling means such as a cable or wire arranged through the inlet 11, for example. The inlet 11 may include a separation that can isolate the inlet 11 from gases and / or heat generated in case of failure of the battery cell pack 20. The sealing material 30 is arranged around the coupling means. Thereby, an envelope is formed around the battery cell pack 20.

[0051] FIG. 3 is a schematic view of a battery device according to one or more exemplary embodiments.

[0052] The embodiment shown in FIG. 3 may be equivalent to the embodiment described with reference to FIGS. 1 and 2, except that the battery device further includes a ventilation bag 40 connected to the vent 13. Therefore, it should be noted that the embodiment shown in FIG. 3 includes similar features, elements, and / or functions as those described above for the embodiments shown in FIGS. 1 and 2.

[0053] The ventilation bag 40 may have a rectangular parallelepiped shape with rounded corners and edges. The ventilation bag 40 has an opening on the side surface of the ventilation bag 40 facing the front surface of the casing 10. The opening of the ventilation bag 40 is coupled to a sealing material (not shown in FIG. 3 but shown in FIGS. 1 and 2) via the vent 13. Thereby, the battery device 1 may be configured to transfer gases and / or heat generated in case of failure of the battery cell pack 20 from the sealing material 30 to the ventilation bag 40. Further, the ventilation bag 40 may be configured to ventilate air and separate gases and / or heat.

[0054] Another difference between the embodiment of the battery device 1 shown in FIG. 3 and the embodiment of the battery device shown in FIG. 1 is that the vent 13 of the battery device 1 is centered (disposed in the middle) on the (back) surface of the casing 10. Further, the vent 13 shown in FIG. 3 can be configured as a rectangular hole passing through the side surface of the casing 10.

[0055] FIG. 4 is a schematic cross-sectional view of the battery device 1 in one or more exemplary embodiments.

[0056] It should be noted that the embodiment shown in FIG. 4 includes features, elements, and / or functions similar or equivalent to those described with reference to FIGS. 1 to 3. The battery device 1 shown in FIG. 4 includes a casing 10, a sealing material 30, a battery cell pack 20, and an inflatable ventilation bag 40. The casing 10 shown in FIG. 4 includes a vent 13 in the form of an opening disposed in the middle of the (front) side of the casing 10. In other words, the vent 13 is provided as a hole passing through the side surface of the casing 10. The sealing material 30 includes an outlet 31 disposed in the vent 13.

[0057] The casing 10 further includes a compartment 12. The compartment 12 is provided as a box with one side open. In other words, the compartment 12 is configured as a container or cavity within the side surface of the casing 10. The compartment 12 can be disposed on the side opened above the vent 13 and can be attached to (or be a part of) the side surface of the casing 10. And the ventilation bag 40 can be disposed inside the compartment 12.

[0058] Before a failure of the battery cell pack, the ventilation bag 40 is in a non-inflated state within the compartment 12. The outlet 31 is coupled to the ventilation bag 40 via the vent 13. In this example, the ventilation bag 40 is configured to inflate upon failure of the battery cell pack 20. Further, the compartment 12 is configured to open upon failure of the battery cell pack 20. The compartment 12 can be lightly attached, for example, to the side surface of the casing 10. The term "lightly attached" means, for example, that the pressure generated by the failure of the battery cell pack 20 is sufficient to remove the compartment 12, which is hanging from the pivoting means (or pivoting element) or placed on the vent 13, from the side surface of the casing 10. For example, the compartment 12 can be rotatably attached to the side surface of the casing 10 along one edge of one of the open sides of the compartment 12. According to another example, the compartment 12 can be attached to the ventilation bag 40 such that the compartment 12 is removed from the side surface of the casing 10 when the ventilation bag 40 inflates.

[0059] FIG. 5 is a schematic cross-sectional view of a battery device 1 according to one or more exemplary embodiments.

[0060] The battery device shown in FIG. 5 may have the same features, elements, and / or functions as the battery device of the embodiments described with reference to FIGS. 1 to 4. The same reference numbers in FIGS. 1 to 5 indicate the same or similar components having the same or similar functions. The difference between the battery device 1 shown in FIG. 5 and the battery device shown in FIG. 2 is that the battery device 1 includes a ventilation bag 40 disposed inside the casing 10. The ventilation bag 40 in FIG. 5 is disposed in the space located between the battery cell pack 20 and the side surface of the casing 10 having the vent 13, and the ventilation bag 40 is shown to be in an inflated state in FIG. 5. The space is defined or delimited by the rear surface of the casing 10, the side surface of the casing 10 adjacent to the rear surface of the casing, and the side surface of the battery cell pack 20 facing the rear surface of the casing 10. In other words, the casing 10 and the battery cell pack 20 are arranged such that a space for disposing the ventilation bag 40 remains inside the casing 10. The sealing material 30 is disposed around the battery cell pack 20, and the outlet 31 may be coupled to the ventilation bag 40. The ventilation bag 40 shown in FIG. 5 may have an outlet that can be coupled to the vent 13 of the casing 10 in sequence. However, in some other embodiments, the casing 10 may not include the vent 13, and the sealing material 30 may simply be connected to the ventilation bag 40. Therefore, according to some embodiments, the ventilation bag 40 may not include any outlet, and / or may be disposed inside the casing 10 that may or may not include the vent 13.

[0061] In the present embodiment, except for the side surface where the ventilation bag is disposed, the battery cell pack 20 and the sealing material 30 may be disposed closely to the other side surfaces of the casing 10. FIG. 6 is a schematic cross-sectional view of the battery device 1 according to one or more exemplary embodiments.

[0062] The battery device shown in FIG. 6 is equivalent to the battery device described with reference to FIG. 5, except that the ventilation bag 40 is in a non-inflated state. The non-inflated ventilation bag 40 can correspond to, for example, the ventilation bag 40 in a folded state. Then, the ventilation bag 40 can inflate to fill the available space in the casing 10 when the battery cell pack 20 fails, such as a thermal runaway of one or more battery cells of the battery cell pack 20.

[0063] Referring to FIGS. 7 and 8, a battery device according to some embodiments of the present disclosure will be described.

[0064] FIG. 7 shows a schematic cross-sectional view of a battery device according to one or more exemplary embodiments. The battery device shown in FIG. 7 includes features, elements, and / or functions that are the same as or equivalent to those of the battery device according to the embodiments described with reference to FIGS. 1 to 6. In the present embodiment, the ventilation bag 40 is disposed in the space between the battery cell pack 20 and the side surface of the casing 10 including the vent 13. In other words, the casing 10 and the battery cell pack 20 are arranged such that the internal space of the casing 10 where the ventilation bag 40 is disposed remains in a manner similar to that shown in FIG. 5 or FIG. 6. However, in the present embodiment, the ventilation bag 40 is initially in a non-inflated state, that is, before a failure of the battery cell pack occurs. Therefore, the embodiment described with reference to FIG. 7 is different from the embodiment described with reference to FIG. 5 in that the space defined by the space in the casing where the ventilation bag 40 is disposed, that is, the (back) surface of the casing 10, the side surface of the casing 10 adjacent to the (back) surface of the casing, and the side surface of the battery cell pack 20 facing the (back) surface of the casing 10, has a reduced size.

[0065] The side of the casing in which the ventilation bag is disposed, for example the back surface, can be opened under the pressure of the ventilation bag when inflated or when being inflated, so the space can have a reduced size (i.e., it does not need to be enlarged to the same size as shown in FIG. 5). Since the ventilation bag 40 is initially in a non-inflated state, less space is required for the ventilation bag within the casing.

[0066] In the present embodiment, the sealing material 30 is disposed around the battery cell pack 20, and the outlet 31 is coupled to the ventilation bag 40.

[0067] An example for providing a side surface of the casing that can be opened under the pressure of the inflated (or inflating) ventilation bag by two pivoting means 12 is shown in FIG. 7. The term "pivoting means" means, for example, a hinge, joint, articulation, or shaft. The side surface 10a of the casing 10 is attached to the upper part of the casing 10 by the pivoting means 12. The pivoting means 12 can be disposed along the upper part of the casing 10 and the adjacent edge of the side surface 10a of the casing 10. Thus, the front surface 10a can pivot, thereby opening the casing 10. It should be understood that the number of pivoting means 12 can be any number, for example, one, two, three, four, or more. The side surface 10a can be configured to open under the pressure increase induced within the casing when the battery cell pack starts to burn, i.e., in case of failure of the battery cell pack 20. Further, the side surface 10a can be configured to be opened by the pressure caused by the inflation of the ventilation bag 40 as a result of smoke and gas entering the ventilation bag when the battery cell pack starts to burn (i.e., when transitioning from a non-inflated state of the ventilation bag to an inflated state).

[0068] FIG. 8 shows a perspective view of the battery device of FIG. 7 as seen from above. In the state shown in FIG. 8, the side surface 10a of the battery device is open. In other words, FIG. 8 shows a situation where the protection system provided by the sealing material and the ventilation bag is in operation. The side surface 10a was opened by the turning means 12 turning under the pressure of the ventilation bag. Therefore, the ventilation bag 40 is located outside the casing 10 in an inflated state.

[0069] In this figure, that is, the side surface 10a of the casing 10 is open, and the sealing material 30 arranged around the battery cell pack and arranged inside the casing 10 can be seen. The ventilation bag 40 is coupled to the outlet 31 of the sealing material 30. The outlet 31 shown in FIG. 8 is square. However, the outlet 31 can include any shape, such as an ellipse or a polygon, for example.

[0070] The inflated ventilation bag 40 has a width, a height, and a length. All of the width, height, and length of the inflated ventilation bag 40 shown in FIG. 8 are dimensions smaller than the width, height, and length of the casing 10, respectively. However, at least one of the width, height, and / or length of the inflated ventilation bag 40 may be larger than the corresponding width, height, and / or length of the casing 10 in other embodiments. While in the non-inflated state, the ventilation bag 40 may be folded or compressed. The ventilation bag 40 can fit inside the casing 10 in the non-inflated state. The ventilation bag 40 can be inflated so that at least one of the width, height, and / or length of the inflated ventilation bag 40 can be larger than the corresponding width, height, and / or length of the casing 10.

[0071] The present invention has been described in the accompanying drawings and the foregoing description, such description being regarded as illustrative or exemplary and not restrictive. The present invention is not limited to the disclosed embodiments. Other variations to the disclosed embodiments can be understood and effected by those skilled in the art in practicing the claimed invention, from a study of the drawings, the disclosure, and the appended claims. In the appended claims, the word "comprising" does not exclude other elements or steps, and the indefinite article "a" or "an" does not exclude a plurality. The mere fact that certain measures are recited in mutually different dependent claims does not indicate that a combination of these measures cannot be advantageously used. Reference signs in the claims should not be construed as limiting the scope. [1] A casing (10), A battery cell pack (20) disposed within the casing, A battery device (1) comprising a flame-retardant sealing material (30) disposed within the casing and disposed around the battery cell pack to isolate the casing from the battery cell pack, The sealing material forms an envelope having an outlet (31) coupled to a ventilation space for ventilation of gas and / or heat generated during a failure of the battery cell pack. Battery device. [2] The flame-retardant sealing material comprises a flame-retardant and / or high-temperature resistant fabric. The battery device of [1]. [3] The casing comprises a vent (13) disposed through a side surface (10a) of the casing, The outlet is coupled to the ventilation space via the vent. The battery device of [1] or [2]. [4] The outlet is airtightly coupled to the vent. The battery device of [3]. [5] The ventilation space Includes a ventilation bag (40) coupled to the outlet via the vent and disposed outside the casing. The battery device of [3] or [4]. [6] The ventilation bag is expandable. The battery device of [5]. [7] The ventilation bag is configured to expand during the failure of the battery cell pack. The battery device of [5] or [6]. [8] The ventilation bag is disposed within a compartment (12) on a side surface of the casing. The battery device of any one of [5] to [7]. [9] The compartment is configured to open during the failure of the battery cell pack. The battery device of [8].

[10] The ventilation space includes an expandable ventilation bag (40) coupled to the outlet and disposed within the casing. The battery device of [1] or [2].

[11] The ventilation bag is in a state of not expanding within the casing and is configured to expand during the failure of the battery cell pack. The battery device of

[10] .

[12] The side surface (10a) of the casing is configured to open during expansion of the ventilation bag so that the ventilation bag can expand outside the casing. The battery device of

[10] or

[11] .

[13] The ventilation bag is a battery device according to any one of [4] to

[12] , comprising a flame-retardant and / or high-temperature resistant fabric.

Claims

1. A casing (10), a battery cell pack (20) disposed within the casing, and a flame-retardant fabric sealing material (30) disposed within the casing and disposed around the battery cell pack to isolate the battery cell pack from the casing, a battery device (1) comprising: The flame-retardant fabric sealing material forms an envelope having an outlet (31) coupled to a ventilation space for ventilation of gas and / or heat generated during a failure of the battery cell pack, The casing comprises a vent (13) disposed through a side surface (10a) of the casing, The outlet is coupled to the ventilation space via the vent, The ventilation space includes a ventilation bag (40) coupled to the outlet via the vent and disposed outside the casing, The ventilation bag is disposed within a compartment (12) in a side surface of the casing, A battery device.

2. The flame-retardant fabric sealing material comprises a flame-retardant and high-temperature resistant fabric, The battery device of Claim 1.

3. The outlet is airtightly coupled to the vent, The battery device of Claim 1 or 2.

4. The ventilation bag is expandable, the battery device according to any one of Claims 1 to 3.

5. The ventilation bag is configured to expand during the failure of the battery cell pack, the battery device according to any one of Claims 1 to 4.

6. The compartment is configured to open during the failure of the battery cell pack, the battery device according to any one of Claims 1 to 5.

7. A casing (10), a battery cell pack (20) disposed within the casing, and a flame-retardant fabric sealing material (30) disposed within the casing and disposed around the battery cell pack to isolate the battery cell pack from the casing, a battery device (1) comprising: The flame-retardant fabric sealing material forms an envelope having an outlet (31) coupled to a ventilation space for ventilation of gas and / or heat generated during a failure of the battery cell pack, The ventilation space is coupled to the outlet and disposed inside the casing, A battery device including an inflatable ventilation bag (40). Battery device. **Claim 8** The ventilation bag is in a non-inflated state within the casing and is configured to inflate upon the failure of the battery cell pack. The battery device according to claim 7. **Claim 9** The side surface (10a) of the casing is configured to open upon inflation of the ventilation bag so that the ventilation bag can inflate outside the casing. The battery device according to claim 7 or 8. **Claim 10** The ventilation bag comprises a flame-retardant and / or high-temperature resistant fabric. The battery device according to any one of claims 7 to 9.

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