Safety devices for batteries, batteries, and vehicles

Abstract

This invention relates to a safety device (20) for a battery (10) comprising at least one battery cell (30) consisting of a battery cell (300) and a flexible housing (301), the battery cell (300) being housed within the flexible housing (301) and the electrodes (302) of the battery cell extending from an opening (303) in the flexible housing, the opening being closed by means of a sealing seam (304) to form a sealed structure. The safety device is arranged in the battery and configured to additionally seal the sealing seam under predetermined conditions. The invention also relates to a corresponding battery and a corresponding vehicle. This invention not only prevents battery or vehicle fires or even explosions caused by the release of flammable materials due to changes in operating conditions, but also enables the manufacture and installation of the safety device with particular simplicity and the achievement of additional safety functions without significantly altering the existing layout.

Description

Technical Field

[0001] This invention relates to the field of batteries, and more particularly to a safety device for batteries. The invention also relates to a battery having such a safety device and a vehicle having such a battery, especially a hybrid vehicle or a pure electric vehicle. Background Technology

[0002] With the continuous research and development and popularization of electric or hybrid vehicles, the requirements for the performance of vehicle power batteries are becoming increasingly higher.

[0003] Currently, lithium-ion batteries have become one of the main solutions for vehicle power batteries. Three existing lithium-ion battery shapes—cylindrical, prismatic, and pouch-type (also known as soft-pack batteries or pouch cells)—are widely used.

[0004] Pouch batteries simplify manufacturing and reduce the weight of individual battery cells by using sealed, flexible aluminum foil as the battery container, thus reducing the overall weight of the battery. Furthermore, pouch batteries can be formed into flexible cells that easily adapt to the available space in a given product, achieving a large aspect ratio.

[0005] However, pouch cells present some challenges due to their flexible casing. The seals of a pouch cell must remain closed throughout its entire lifespan. This is difficult because pouch cells "breathe" during cycling, meaning their thickness (volume) varies depending on the state of charge. During charging and discharging, the gas inside the pouch cell expands. This creates alternating pressure fluctuations inside the pouch cell and can lead to overpressure.

[0006] Furthermore, the aging process exhibited during degassing can also cause the pouch cell to swell. Additionally, the generated heat needs to be dissipated very effectively; otherwise, the pouch cell may swell during gas production, which is considered a safety risk.

[0007] Therefore, under the aforementioned possible circumstances, the seals of the pouch battery may unintentionally open and leak. In the worst-case scenario, flammable materials inside the pouch battery, such as electrolyte or debris, may escape, potentially leading to a fire or even an explosion.

[0008] Therefore, there remains a need for improved solutions for at least some of the aforementioned problems. Summary of the Invention

[0009] Based on this, the present invention proposes an efficient solution that not only overcomes the shortcomings of existing technical solutions, but also is particularly simple to manufacture and install, and can achieve additional safety functions without significantly changing the existing layout.

[0010] According to a first aspect of the invention, a safety device for a battery is provided, the battery comprising at least one battery cell consisting of a battery cell and a flexible housing, the battery cell being housed within the flexible housing and the electrodes of the battery cell extending from an opening in the flexible housing, the opening being closed by means of a sealing seam to form a seal, the safety device being disposed outside the battery cell and configured to additionally seal the sealing seam under predetermined conditions.

[0011] The basic concept of this invention is that the sealing effect attached to the sealing seam, through the setting of a safety device, achieves the safety guarantee of the battery cell. This ensures that the sealing seam can be reliably sealed in the event that the sealing seam may separate due to changes in the environment and changes in the operating state of the battery cell or battery, especially under conditions of increased temperature or pressure, thus preventing the battery cell or vehicle from catching fire or even exploding due to the release of flammable materials due to changes in operating conditions.

[0012] Advantageous configurations of the technical solution of the present invention can be obtained from the following optional embodiments.

[0013] According to an alternative embodiment of the safety device for a battery based on the invention, the safety device additionally seals the seal seam in the event of heat introduction. This embodiment enables particularly simple sealing of the seal seam, and the triggering or activation of the safety device is simple and easy to operate.

[0014] According to an optional embodiment of the safety device for a battery of the present invention, the safety device includes a first member and a second member. The first member is fixedly arranged relative to the battery cell. The first member includes a base and at least two extensions extending from the base in the same direction. A sealing seam is located between the extensions. The second members are respectively arranged in the extensions of the first member and configured to move toward the sealing seam respectively in the event of heat introduction, so as to generate a sealing force acting on the sealing seam from both sides of the sealing seam. This embodiment has a simple structure and achieves a clamp-like structure, which is easy to manufacture and install.

[0015] In an alternative embodiment of the safety device for a battery according to the invention, a groove is formed in the sidewall of the extension of the first member, and the second member is disposed in the groove, wherein the groove is elongated and extends along the length direction of the sealing seam. This embodiment is easy to manufacture and simplifies the arrangement and retention of the second member in the first member.

[0016] In one alternative embodiment of the safety device for batteries according to the invention, the temperature at which heat is introduced is between 50 and 60 degrees Celsius. This embodiment is particularly advantageous in ensuring that the safety device will not be automatically triggered or activated during transport at normal temperatures, for example, an ambient temperature of 30 degrees Celsius. This also facilitates storage and installation.

[0017] According to an alternative embodiment of the safety device for a battery based on the invention, the second component comprises a foamed material capable of thermal expansion. This embodiment is simple in structure, easy to arrange, and cost-effective. Furthermore, the foamed material enables a particularly reliable sealing effect. That is, for example, during the encapsulation process before battery operation, the foamed material can be heated using a dedicated heat introduction device.

[0018] In one alternative embodiment of the safety device for a battery according to the invention, the first component is constructed as a support made of a thermally conductive material. This embodiment facilitates heat introduction and allows heat to be introduced only into the first component, enabling a more uniform foaming process for the second component, such as a foaming material. Furthermore, this embodiment also provides the possibility of sealing the safety device during battery operation in a vehicle.

[0019] In one alternative embodiment of the safety device for a battery according to the invention, the first component is constructed as a bracket made of a heat-resistant material. This embodiment is lightweight and cost-effective.

[0020] According to an alternative embodiment of the safety device for a battery based on the present invention, the second component further includes a clamping device that is triggered when the foam material expands due to heat, mechanically clamping it onto the foam material toward the seal. This embodiment further improves the safety and operational reliability of the battery.

[0021] According to a second aspect of the invention, a battery is provided, the battery comprising: at least one battery cell comprising a battery cell and a flexible housing, the battery cell being housed within the flexible housing and electrodes of the battery cell extending from an opening in the flexible housing, the opening being closed by means of a sealing seam to form a sealed structure; and a safety device according to the first aspect.

[0022] In an alternative embodiment of the battery according to the invention, the battery includes a housing in which a plurality of battery cells are arranged side-by-side and spaced apart in the same direction, wherein the safety device is disposed on the housing. This embodiment enables grouping of a plurality of battery cells and provides the possibility of arranging the safety device.

[0023] In this invention, "in the same direction" means that the electrode directions of each battery cell or the opening direction of the flexible shell (the direction of the sealing seam) are arranged in the same direction. For example, in the battery, the opening direction of the flexible shell of the battery cell is upward.

[0024] In an optional embodiment of the battery according to the invention, the sealing seams are additionally sealed by means of the safety device before the battery operates. This embodiment simplifies the installation of the safety device. That is, the safety device seals each sealing seam of the battery cell after the battery cells are assembled and before packaging, i.e., before the battery operates, thus the safety device is fixed to the battery cell, eliminating the need to separately set up an installation position for the safety device within the battery. In actual installation, workers can hold the safety device for installation before packaging, which simplifies the structural design of the battery and reduces installation costs.

[0025] In an alternative embodiment of the battery according to the invention, the seal is additionally sealed by means of the safety device after the battery has been in operation. This embodiment provides a so-called "active safety" mode of operation. That is, it is not necessary to seal the seal before the battery is packaged. This is particularly advantageous when performing pre-shipment diagnostics on individual battery cells, as it simplifies operation and maintenance by eliminating the need to remove the pre-sealed safety device.

[0026] In an optional embodiment of the battery according to the present invention, a temperature sensor and / or a pressure sensor are arranged in the battery cell for detecting the temperature inside the battery cell and / or detecting the pressure inside the battery cell. If the detected temperature value and / or the detected pressure value exceeds a predetermined temperature threshold and / or pressure threshold, the safety device is triggered to seal the seal. This embodiment can reliably control the sealing action of the safety device according to the operating conditions and real-time status inside the battery cell.

[0027] In an optional embodiment of the battery according to the present invention, the battery further includes a heating device and a battery control system. The heating device is thermally connected to the safety device, and the battery control system is data-connected to the heating device and the temperature sensor and / or the pressure sensor. If the detected temperature value and / or the detected pressure value exceeds a predetermined temperature threshold and / or pressure threshold, the battery control system controls the heating device to conduct heat to the safety device. This embodiment achieves reliable activation or triggering of the safety device by utilizing an existing battery control system and simply adding a heating device.

[0028] In an alternative embodiment of the battery according to the present invention, the battery cell is constructed as a pouch cell. This embodiment is simple in structure, technologically mature, and cost-effective.

[0029] According to a third aspect of the invention, a vehicle, particularly a pure electric vehicle or a hybrid vehicle, is provided, said vehicle comprising a battery according to a second aspect of the invention.

[0030] Further features of the invention will become apparent from the claims, drawings, and description of the figures. Features and combinations of features mentioned in the foregoing description, as well as features and combinations of features mentioned in the following description of the figures and / or shown only in the figures, can be used not only in the corresponding specified combinations, but also in other combinations without departing from the scope of the invention. Therefore, the following are also considered to be covered and disclosed by the invention: those not explicitly shown in the figures and not explicitly interpreted, but rather derived from and produced by combinations of separate features derived from the interpreted content. The following combinations of features are also considered to be disclosed: those that do not possess all the features of the originally drafted independent claims. Furthermore, the following combinations of features are considered to be disclosed, especially those exceeding or deviating from the feature combinations defined in the reference relationships of the claims. Attached Figure Description

[0031] The principles, features, and advantages of the invention will be better understood below by referring to the accompanying drawings. In the drawings:

[0032] Figure 1 A schematic diagram of a vehicle according to one embodiment of the present invention is shown;

[0033] Figure 2 A view of a battery cell according to one embodiment of the present invention is shown;

[0034] Figure 3 A schematic diagram of a safety device according to an embodiment of the present invention is shown;

[0035] Figure 4A schematic diagram of a safety device according to another embodiment of the present invention is shown;

[0036] Figure 5 It shows that according to Figure 3 or Figure 4 A schematic diagram of the safety device in the image, wherein the safety device is in an inactive state;

[0037] Figure 6 It shows Figure 5 A schematic diagram of the functional principle of the safety device in the diagram, wherein the safety device is in the activated state;

[0038] Figure 7 A schematic diagram of a safety device according to an embodiment of the present invention is shown, wherein a plurality of battery cells are provided;

[0039] Figure 8 A schematic diagram of a battery according to one embodiment of the present invention is shown; and

[0040] Figure 9 A schematic diagram of the components of a battery according to one embodiment of the present invention is shown.

[0041] List of reference numerals

[0042] 1 vehicle

[0043] 10 batteries

[0044] 20 Safety devices

[0045] 30 battery cells

[0046] 40 Heating device

[0047] 50 Battery Control System

[0048] 100 housing

[0049] 200 First Component

[0050] 201 Second Component

[0051] 202 Groove

[0052] 203 Base

[0053] 204 Extension

[0054] 300 battery cells

[0055] 301 Flexible Housing

[0056] 302 electrode

[0057] 303 Opening

[0058] 304 Sealing Joint

[0059] 305 Temperature Sensor

[0060] 306 Pressure Sensor

[0061] S Intermediate Space

[0062] XYZ coordinate system. Detailed Implementation

[0063] To make the technical problems to be solved, the technical solutions, and the beneficial technical effects of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and several exemplary embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of protection of this invention.

[0064] In this specification, for convenience, terms such as "middle," "upper," "lower," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," and "outer" are used to indicate orientation or positional relationships in conjunction with the accompanying drawings. This is solely for the purpose of facilitating the description and simplification, and does not imply that the device or element referred to has a specific orientation, or is constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this disclosure. The positional relationships of the constituent elements may be appropriately varied depending on the direction in which each constituent element is described. Therefore, the use of terms not limited to those described in the specification may be appropriately replaced as needed.

[0065] Figure 1 A schematic diagram of a vehicle 1 according to one embodiment of the present invention is shown. In this embodiment, the vehicle 1 is constructed as a pure electric vehicle. The vehicle 1 includes a battery 10 disposed in the chassis of the vehicle 10 as an energy source. Figure 1 The diagram also shows an XYZ coordinate system, where the X direction represents the longitudinal direction of vehicle 1, the Y direction represents the lateral direction of vehicle 1, and the Z direction represents the height direction of vehicle 1.

[0066] Figure 2 A view of a battery cell 30 according to one embodiment of the present invention is shown. Figure 2 As shown, according to this embodiment, the battery cell 30 is constructed as a pouch battery cell and includes a battery cell 300 and a flexible housing 301.

[0067] According to one embodiment, the flexible housing 301 is made of aluminum foil and has an opening 303 open at one end. A battery cell 300 is housed within the flexible housing 301 through the opening 303, and the electrode 302 of the battery cell 300 extends from the opening 303 of the flexible housing 301. A sealing seam can be formed at the opening 303, and the opening 303 is closed by means of a sealing seam 304 to form a sealed bag-like structure.

[0068] According to one embodiment, the sealing seam 304 is achieved by a weld, and according to this embodiment, the opening 303 is sealed in a direction transverse to the opening of the opening 303, thus enclosing the battery cell 300 within the flexible housing 301 to form the battery cell 30. Therefore, in this closed structure, for example, the electrolyte in the battery cell 300 will not leak to the outside, and when the battery 10 is operating, the reactive gases in the battery cell 300 are enclosed within the flexible housing 301 and will not leak to the outside, thus preventing safety risks.

[0069] In this invention, the battery cell 300 is also referred to as a battery cell and, according to one embodiment, is constructed as a lithium battery cell, which includes at least electrodes (positive and negative electrodes), an electrolyte, a separator, and other constituent elements. Since the internal structure, electrochemical reactions, and operating mode of the battery cell 300 are not the focus of this invention, they will not be described in detail here.

[0070] It should be pointed out that, Figure 2 The structure of the pouch cell shown is merely exemplary and does not constitute a limitation on other possible structures.

[0071] Because the flexible outer shell 301 of the battery cell 300 has sufficient strength, the pressure and reaction gases generated within the battery cell 300 will not rupture the flexible outer shell 301 itself. Therefore, it is possible that the pressure generated within the battery cell 300 could act on the sealing seam 304, and if the pressure is excessive (excessive gas production), it could rupture the sealing seam 304, leading to a safety hazard. Furthermore, because the electrochemical reaction within the battery cell 300 generates a large amount of heat, this heat could also cause the sealing seam 304 to open, resulting in a safety hazard. Therefore, it is necessary to ensure that the sealing seam 304 of the battery cell 300 remains closed and sealed at all times.

[0072] Below, in conjunction with Figures 3 to 7 The functions of the safety device of the present invention are described in detail.

[0073] Figure 3 A schematic diagram of a safety device 20 according to an embodiment of the present invention is shown. (In conjunction with...) Figure 5 According to this embodiment, the safety device 20 includes a first component 200. The first component 200 is fixedly arranged relative to the battery cell 30.

[0074] According to this embodiment, the first component 200 includes a base 203 and at least two extensions 204 extending from the base 203 in the same direction, and a sealing seam 304 is located in the intermediate space S formed between the two extensions 204 (see [link]). Figure 3 ).

[0075] like Figure 3 As shown, the first component 200 includes a plurality of extensions 204, and the dashed lines in the figure represent the omission of a plurality of structurally identical extensions 204.

[0076] Depend on Figure 3 As can be seen, a groove 202 is formed in the sidewall of the extension 204 of the first member 200, and the groove 202 extends elongatedly in one direction. In this embodiment, the groove 202 extends in a direction perpendicular to the plane of the drawing.

[0077] In addition, such as Figure 5 As shown, the safety device 20 also includes a second component 201, which is respectively arranged in the groove 202 of the extension 204 of the first component 200. When the safety device 20 is arranged, the groove 202 always extends along the length direction of the sealing seam 304.

[0078] According to one embodiment, the second member 201 is adapted to move toward the sealing seam 304 respectively when heat is introduced, so as to generate a sealing force acting on the sealing seam 304 from both sides of the sealing seam 304, thereby additionally sealing the already closed sealing seam 304.

[0079] According to one embodiment, the second component 201 includes a foam material that is capable of expanding when heated.

[0080] Figure 4 A schematic diagram of a safety device 20 according to another embodiment of the present invention is shown. Figure 3 The difference is, Figure 4 The groove 202 in the first component 200 extends vertically in the plane of the attached drawing, rather than as... Figure 3 Extending perpendicular to the plane of the attached diagram. In other words, Figure 4 The extension direction of the groove 202 in the middle is... Figure 3 The grooves 202 extend in different directions (vertical).

[0081] Since the extension direction of the groove 202 is always consistent with the extension direction of the sealing seam 304, during installation, Figure 3 The base 203 of the first component 200 is located above the electrode 302, which enables a compact arrangement of the safety device 20 on the battery cell 30. Figure 4The base 203 of the first component 200 is located next to the electrode 302, which simplifies the series or parallel electrical connection of multiple battery cells 30.

[0082] like Figure 4 As shown, the first component 200 includes a plurality of extensions 204, and the dashed lines in the figure also represent the omission of a plurality of extensions 204 with the same structure.

[0083] exist Figure 3 and Figure 4 It is understandable that only one groove 202 needs to be provided in the extension 204 at both ends of the first component 200.

[0084] Figure 5 and Figure 6 They respectively showed according to Figure 3 or Figure 4 A schematic diagram of the safety devices in the system. Figure 5 The diagram shows a state where the safety device 20 is not activated or triggered. Figure 6 A schematic diagram is shown with the safety device 20 in operation or triggered.

[0085] As described above, Figure 5 The second component 201 is arranged in the groove 202 and is flush with the sidewall of the extension 204 in this state (see also...). Figure 3 or Figure 4 ).

[0086] In order to further seal the seal 304, in Figure 6 Heat is introduced into the second component 201, enabling it to move from the groove 202 toward the sealing seam.

[0087] Since the second component 201 includes foamed material, the foamed material expands when heated and fills the intermediate space S (see...). Figure 3 or Figure 4 The space is filled with water, and thus the sealing seam 304 located in the intermediate space S is additionally sealed and secured.

[0088] According to one embodiment, the foaming material can be heated directly by a dedicated heating device before the battery 10 is encapsulated, that is, at least before the battery 10 is installed in the vehicle 1.

[0089] According to one embodiment, the foaming material is selected so that it only begins to expand and foam upon the introduction of heat between 50 and 60 degrees Celsius. This is particularly advantageous in ensuring that the foaming material does not unintentionally foam under normal transport and storage safety conditions and at room temperature.

[0090] Here, the first component 200 can be constructed as a support made of high-temperature resistant plastic.

[0091] According to another embodiment, the first component 200 can be constructed as a support made of a thermally conductive material, such as metal. Therefore, heat can be indirectly introduced into the foamed material located in the groove 202 via a heating device.

[0092] According to an embodiment not shown, the second component 201 further includes a clamping device that is triggered when the foam material expands due to heat to mechanically clamp the foam material toward the sealing seam 304.

[0093] Figure 7 A schematic diagram of a safety device according to an embodiment of the present invention is shown, wherein a plurality of battery cells 30 are provided. In this embodiment, the plurality of battery cells 30 are arranged side by side and spaced apart, facing the same direction. Figure 3 or Figure 4 The sealing seam 304 of each battery cell 30 is located between each of the two extensions 204.

[0094] The following is combined Figure 8 and Figure 9 The battery 10 includes a safety device 20.

[0095] Figure 8 A schematic diagram of a battery 10 according to one embodiment of the present invention is shown.

[0096] like Figure 8 As shown, the same is also shown. Figure 1 The same XYZ coordinate system is used. According to this embodiment, the battery 10 includes a housing 100, a plurality of battery cells 30, and a safety device 20. The plurality of battery cells 30 are arranged side by side and spaced apart in the housing 100, perpendicular to the XY plane and facing the same Y direction, that is, the electrodes 302 are all arranged facing the Y direction.

[0097] Safety device 20 is arranged on the inner wall of housing 100 in the Z direction.

[0098] In this view, the safety device 20 is not yet activated and the seal 304 has not yet been additionally sealed.

[0099] Figure 9 A schematic diagram of the components of a battery 10 according to an embodiment of the present invention is shown. According to this embodiment, in addition to the safety device 20 and the battery cell 30, the battery 10 also includes a heating device 40 and a battery control system (BMS) 50.

[0100] According to one embodiment, a temperature sensor 305 for detecting the internal temperature of the battery cell 30 and a pressure sensor 306 for detecting the internal pressure of the battery cell 30 are arranged in the battery cell 30. The heating device 40 is thermally connected to the safety device 20, and the battery control system 50 is data-connected to the heating device 40, the temperature sensor 305, and the pressure sensor 306. In this figure, dashed lines represent data connections and electrical connections.

[0101] According to one embodiment, during vehicle 1 operation, or when battery 10 is in operation, temperature sensor 305 and pressure sensor 306 detect temperature and pressure data in battery cell 30 in real time and transmit them to battery control system 50 in real time. If the detected temperature value and / or the detected pressure value exceeds a predetermined temperature threshold and / or pressure threshold, battery control system 50 controls heating device 40 to conduct heat to safety device 20. The foaming material in safety device 20 foams upon heating and seals the seam in a timely manner.

[0102] The safety device 20 of the present invention can be used at different stages. That is, the sealing seam 304 can be additionally sealed by the safety device 20 in advance when the battery 10 is not yet encapsulated, or the sealing seam 304 can be additionally sealed "actively" and adaptively by the safety device 20 according to the operating status of the battery 10 and the environmental conditions when the battery 10 is encapsulated and in operation.

[0103] Of course, the foaming material used in this invention is also exemplary, and the same function can be achieved by using other similar and suitable materials.

[0104] In summary, the technical solution of this invention can significantly improve the safety of the battery cell 30 or the battery 10, and avoid risks such as leakage, fire or even explosion of the battery 10.

[0105] Other advantages and alternative embodiments of the invention will be apparent to those skilled in the art. Therefore, the invention is not, in its broader sense, limited to the specific details, representative structures, and exemplary embodiments shown and described. Rather, those skilled in the art can make various modifications and substitutions without departing from the basic spirit and scope of the invention.

Claims

1. A safety device (20) for a battery (10), the battery (10) comprising at least one battery cell (30) consisting of a battery cell (300) and a flexible housing (301), the battery cell (300) being housed within the flexible housing (301) and the electrodes (302) of the battery cell (300) extending from an opening (303) in the flexible housing (301), the opening (303) being closed by means of a sealing seam (304) to form a sealed structure, wherein, The safety device (20) is disposed outside the battery cell (300) and configured to additionally seal the seal seam (304) therein under predetermined conditions. In the event of heat introduction, the safety device (20) additionally seals the seal seam (304) therein. The safety device (20) includes a first member (200) and a second member (201). The first member (200) is fixedly disposed relative to the battery cell (30). The first member (200) includes a base (203) and at least two extensions (204) extending from the base (203) in the same direction. The seal seam (304) is located between the extensions (204). The second member (201) is disposed in the extensions (204) of the first member (200) and configured to move toward the seal seam (304) respectively in the event of heat introduction, so as to generate a sealing force acting on the seal seam (304) from both sides of the seal seam (304).

2. The safety device (20) for a battery (10) according to claim 1, characterized in that, A groove (202) is constructed in the side wall of the extension (204) of the first member (200), and the second member (201) is arranged in the groove (202), wherein the groove (202) is elongated and extends along the length direction of the sealing seam (304).

3. The safety device (20) for a battery (10) according to claim 1 or 2, characterized in that, The temperature at which the heat is introduced is between 50 and 60 degrees Celsius.

4. The safety device (20) for a battery (10) according to claim 1 or 2, characterized in that, The second component (201) includes a foamed material that is capable of expanding upon heating; and / or The first component (200) is constructed as a support made of thermally conductive material or a support made of heat-resistant material.

5. The safety device (20) for a battery (10) according to claim 3, characterized in that, The second component (201) includes a foamed material that is capable of expanding upon heating; and / or The first component (200) is constructed as a support made of thermally conductive material or a support made of heat-resistant material.

6. The safety device (20) for a battery (10) according to claim 4, characterized in that, The second component (201) also includes a clamping device that is triggered when the foam material is heated and expands to mechanically clamp the foam material toward the seal (304).

7. The safety device (20) for a battery (10) according to claim 5, characterized in that, The second component (201) also includes a clamping device that is triggered when the foam material is heated and expands to mechanically clamp the foam material toward the seal (304).

8. A battery (10), characterized in that, The battery (10) includes: At least one battery cell (30), the battery cell (30) comprising a battery cell (300) and a flexible housing (301), the battery cell (300) being housed within the flexible housing (301) and the electrodes (302) of the battery cell (300) extending from an opening (303) in the flexible housing (301), the opening (303) being closed by means of a sealing seam (304) to form a sealed structure; and The safety device (20) according to any one of claims 1 to 7.

9. The battery (10) according to claim 8, characterized in that, The battery (10) includes a housing (100) in which a plurality of battery cells (30) are arranged side by side and spaced apart in the same direction, wherein the safety device (20) is arranged on the housing (100).

10. The battery (10) according to claim 8 or 9, characterized in that, Before the battery (10) is in operation, the sealing seam (304) is additionally sealed by means of the safety device (20).

11. The battery (10) according to claim 8 or 9, characterized in that, After the battery (10) has been in operation, the sealing seam (304) is additionally sealed by means of the safety device (20).

12. The battery (10) according to claim 11, characterized in that, The battery cell (30) is provided with a temperature sensor (305) for detecting the temperature inside the battery cell (30) and / or a pressure sensor (306) for detecting the pressure inside the battery cell (30). If the detected temperature value and / or the detected pressure value exceeds a predetermined temperature threshold and / or pressure threshold, the safety device (20) is triggered to seal the sealing seam (304).

13. The battery (10) according to claim 12, characterized in that, The battery (10) further includes a heating device (40) and a battery control system (50). The heating device (40) is thermally connected to the safety device (20). The battery control system (50) is data-connected to the heating device (40) and the temperature sensor (305) and / or the pressure sensor (306). If the detected temperature value and / or the detected pressure value exceeds a predetermined temperature threshold and / or pressure threshold, the battery control system (50) controls the heating device (40) to conduct heat to the safety device (20).

14. The battery (10) according to any one of claims 8, 9, 12 and 13, characterized in that, The battery cell (30) is constructed as a pouch battery cell.

15. A vehicle (1), characterized in that, The vehicle (1) includes a battery (10) according to any one of claims 8 to 14.

16. The vehicle (1) according to claim 15, characterized in that, The vehicle (1) is a pure electric vehicle or a hybrid vehicle.

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