Battery assembly with a degassing channel and motor vehicle

Abstract

The invention relates to a battery arrangement (10) with a degassing channel (26) for the discharge of a gas (30) escaping from a battery cell (22) of the battery arrangement (10), wherein the battery cell (22) comprises a releasable cell degassing opening (24), and the degassing channel (26) has a releasable or released inlet opening (34) which is connected to the releasable cell degassing opening (24). The degassing channel (26) is designed as an at least partially flexible hose (26) which can be transformed from a folded state (Z1) to an at least partially unfolded state (Z2) in which the hose (26) has a greater height (h2) and / or width than in the folded state (Z1), wherein the hose (26) has a flap (36) which closes the inlet opening (34) in a closed state (Z1), and by means of which the inlet opening (34) can be released in the event of degassing of the at least one battery cell (22).

Description

[0001] The invention relates to a battery arrangement with a degassing channel for removing gas escaping from a battery cell or battery arrangement, wherein the battery arrangement comprises at least one battery cell having a releasable cell degassing opening, and the degassing channel having a releasable or released inlet opening connected to the releasable cell degassing opening. The degassing channel with the inlet opening is arranged above the at least one battery cell in a first direction. The invention further relates to a motor vehicle with such a battery arrangement.

[0002] In modern batteries, such as high-voltage batteries, battery cells of various designs are integrated into the battery, including pouch cells, cylindrical cells, prismatic cells, and so on. The cells themselves are grouped into cell modules or installed as integrated systems. In addition to the cells, high-voltage batteries often incorporate mechanical and electrical connections, a cooling system, and other functional components. A particular challenge lies in meeting the stringent safety requirements in the event of thermal propagation (TP). In a TP event, large volumes of gas must be rapidly and controllably vented from the burning cell into the surrounding environment. Damage to surrounding cells and any potential chain reaction of burning cells must be prevented or at least significantly delayed.In the high-voltage battery system, maximum packing density is also a goal, which complicates the integration of outgassing channels. A further hazard is posed by the metallic particles released during outgassing, which are ejected with the hot combustion gases. These could, in principle, lead to short circuits and arcing, generating temperatures exceeding 3,000 °C, which could cause the protective devices to fail. The probability of such arcing is increased within the cell module. Due to the internal interconnection of the cells, the live components are positioned close to each other and in close proximity to the accessible cell vents, which may be designed as rupture membranes. A venting channel allows the escaping gases to be channeled away, thus eliminating the risk of arcing.However, degassing channels sometimes require a lot of installation space, which is already limited in a motor vehicle.

[0003] It would therefore be desirable to be able to integrate a degassing channel into a battery arrangement with as little installation space as possible, which enables the safe removal of gases escaping from a cell in the event of degassing.

[0004] DE 10 2013 204 087 A1 describes a degassing system for a battery module or battery pack housed in a casing. The casing contains a number of battery cells. The degassing system is integrated into the casing of the battery module or battery pack. The degassing system can include a collector located in close proximity to the individual battery cells. This collector can be designed as a hollow body and have a number of openings on its side facing the battery cells. Each battery cell can be assigned a corresponding opening. Gas escaping from one of the battery cells can flow through the assigned opening of the collector and flow towards the outlet of the collector.

[0005] Such a degassing system also requires a relatively large amount of installation space.

[0006] EP 4 156 365 A1 describes an electrochemical energy storage element. This comprises a battery module with a housing and a plurality of electrochemical energy storage cells inside the housing. The electrochemical energy storage element includes at least one collection device for escaping flue gases, designed as a deployable bag. This minimizes the amount of gas released into the environment in the event of a malfunction. The collection device can, for example, be integrated into a battery pack and, when folded, enclose the energy storage cells or elements of the battery pack.

[0007] However, there is a significant risk that the gas escaping from a cell, including the electrically conductive particles, will come into contact with the cell poles, pole connectors, or other current-carrying components, which can lead to the arcing and fire described above. Alternatively, the collection device can be connected to a designated degassing channel. However, this requires additional installation space.

[0008] DE 10 2012 212 457 A1 describes a system for degassing a battery, comprising a receiving element made of an elastic material and having an opening through which gas can be introduced into the receiving element. The receiving element is located inside the battery, where at least one battery cell is located. The volume of the receiving element can be expanded many times over when gas is absorbed. The receiving element is made of an electrically insulating material and may include a fabric structure. The receiving elements can be in fluidic communication with safety valves located in the battery housing.

[0009] Constructing a structure from an electrically insulating, elastic material often cannot be combined with the highest possible temperature resistance. Furthermore, this approach does not provide protection for neighboring cells that are not thermally conductive.

[0010] The object of the present invention is therefore to provide a battery arrangement and a motor vehicle that enable the safest possible gas extraction in a space-saving manner, and by means of which the highest possible level of protection for still intact battery cells can be provided.

[0011] This problem is solved by a battery arrangement and a motor vehicle with the features according to the respective independent patent claims. Advantageous embodiments of the invention are the subject of the dependent patent claims, the description, and the figures.

[0012] A battery arrangement according to the invention comprises a degassing channel for removing gas escaping from a battery cell or battery arrangement, wherein the battery arrangement also comprises the at least one battery cell having a releasable cell degassing opening, and the degassing channel has a releasable or released inlet opening connected to the releasable cell degassing opening. Furthermore, the degassing channel is designed as at least a partially flexible tube that can be transformed from a folded state to an at least partially unfolded state, in which the tube has a greater height and / or width than in the folded state, and wherein the tube has a flap that closes the inlet opening in a closed state, and by means of which the inlet opening can be released in the event of degassing of the at least one battery cell.

[0013] The flexible hose can be integrated into the battery assembly in a very space-saving manner. Its flexible design allows it to adapt to the surrounding free space geometry, even during degassing. The foldable design also offers the significant advantage of eliminating the need for an elastic material. This allows the hose to be made from a highly temperature-resistant material, particularly a metallic one. Furthermore, the hose's design, which incorporates a flap that seals the inlet when closed, provides excellent protection for neighboring cells that are still intact and not thermally permeable. Gas entering the hose from a thermally permeable cell is thus effectively prevented from reaching the degassing vents of any adjacent cells by the closed flaps.Such a releasable cell vent can be designed, for example, as a rupture membrane, e.g., made of aluminum. Damage to the typically very sensitive releasable cell vents of still-intact neighboring cells can thus be prevented, or at least the risk of such damage significantly reduced. Overall, this makes it possible to integrate a venting channel into a battery assembly in a particularly space-saving manner, while significantly increasing the safety and reliability of gas removal. Furthermore, the expansion or unfolding of the vent tube during venting requires work to be performed by the gas itself, thereby releasing energy. This leads to a cooling of the gas and also to a deceleration of the gas, resulting in further cooling. This allows for even more effective prevention of thermal transfer to neighboring cells.

[0014] The hose can be fully flexible or only partially flexible. For example, the hose can also include a rigid side wall, such as a side wall facing the battery cell and / or a side wall facing away from the battery cell. Furthermore, other existing components of the battery assembly can also form part of the hose. In other words, existing components such as plates, walls, covers, underride guards, or similar elements can also provide a portion of the hose. Alternatively, the hose can be manufactured as a separate component and integrated into the battery assembly. This could result in a closed hose or, alternatively, an open design similar to a gutter, where the hose is closed by other parts of the structure.

[0015] The battery cell can be, for example, a lithium-ion cell or any other cell chemistry. The at least one battery cell can also be a cylindrical cell, a prismatic cell, or a pouch cell.

[0016] Furthermore, the battery assembly can also comprise multiple battery cells. These can be configured as described above and below for the at least one battery cell. Accordingly, the degassing channel or hose can also include multiple inlet openings, with each inlet opening being assigned to one of the battery cells and connected to the respective releasable cell degassing vent of the assigned battery cell. Each of the hose's inlet openings can be closed or sealed with an associated flap, which only opens the inlet opening when the assigned battery cell degasses.

[0017] The flap is designed to have both a closed and an open state. In the closed state, it seals the entrance opening, and in the open state, it releases the entrance opening. The transition from the closed to the open state is achieved by opening the flap. This process may be irreversible.

[0018] The degassing channel with its inlet opening can be positioned above the at least one battery cell with respect to a first direction. With respect to the intended installation position of the battery assembly, for example in a motor vehicle, this first direction can be aligned with or against the vehicle's vertical axis. The degassing channel or hose can therefore be positioned above the battery cell with respect to the vehicle's vertical axis, or, for example, below the at least one battery cell. The height of the hose can be defined with respect to this first direction, and the width of the hose can be defined perpendicular to its height and perpendicular to a longitudinal direction of the hose.If the battery arrangement comprises a cell stack with several battery cells arranged side by side in one stacking direction, the longitudinal direction of the hose can correspond to the stacking direction. This allows the hose to be easily connected to all accessible cell degassing vents of the cells in the cell stack.

[0019] The hose can have an interior enclosed by a single or multi-part hose wall. When the hose is folded, different sections of this hose wall can overlap. This allows for a particularly space-saving installation of the hose during normal operation of the battery assembly, without any degassing of the battery cell. The hose can be flattened or folded multiple times, for example, accordion-style or similar.

[0020] To make the hose at least partially flexible, it can comprise a correspondingly thin-walled hose wall or even several thin-walled hose walls. To ensure the hose is still as temperature-resistant as possible, it is a further highly advantageous embodiment of the invention if the hose is made of a metallic material, in particular steel or stainless steel. At least parts of the hose, or the entire hose, can, for example, be made of a metal foil, in particular a steel or stainless steel foil. This metal foil can, for example, have a wall thickness of less than 1 mm, in particular less than 0.5 mm, for example, approximately 0.1 mm. This allows hot gases to be reliably conveyed through the hose, and furthermore, this provides a particularly high level of protection for neighboring cells through the flaps, which are also made of the metallic material, in particular steel or stainless steel.

[0021] Especially when the hose is made of a metallic material, it is still advantageous if the hose maintains a certain safety distance from live parts of the battery assembly, in particular the battery module and / or the battery.

[0022] According to a further advantageous embodiment of the invention, the hose is closed at at least one end. Gas introduced into the hose through the inlet opening can thus be guided essentially in only one flow direction. The closed end of the hose therefore allows a preferred flow direction within the hose to be defined for gas discharge.

[0023] Furthermore, it is advantageous if the at least one battery cell is housed in a receiving space of the battery assembly, and the hose has an open end, with its open end extending into an area outside the receiving space. The receiving space can be the interior of a battery housing or the interior of a module housing, which in turn is located inside a battery housing. The external area outside the receiving space can accordingly be located either within the battery housing or outside such a battery housing. Thus, in the longitudinal direction of the hose, the open end can be opposite the closed end.The open end of the hose allows the gas introduced into the hose to be directed to an area outside the battery assembly's containment space, for example, from a battery module or from the entire battery, which may comprise multiple battery modules. The open end of the hose can, for example, lead into or terminate in a degassing duct, or alternatively, be directed directly into an external space outside the battery and / or outside the vehicle in which the battery assembly is used. Alternatively, it can terminate in a cover plate that, for example, covers all cell modules and / or cells contained within the battery and forms a space between a battery cover and the battery cells or the battery module, from where the gas is directed to the external space. Other configurations are also conceivable.

[0024] The hose does not necessarily have to be open at one end. According to a further advantageous embodiment of the invention, the hose can be provided with perforations in a specific section, designed to retain particles contained in any gas escaping from the battery cell during degassing. These perforations effectively provide a particle filter or sieve. The hose can therefore also be closed at both ends, with perforations outside the module forming a sieve that allows gas to enter the battery compartment but prevents particles from entering. Such particles cannot leave the interior of the hose. Only gas molecules can penetrate the specific section of the hose and enter the surrounding environment.The perforated section of the hose can, in principle, be located anywhere along the hose. Nevertheless, it is advantageous if this section is connected, for example, to a degassing channel or chamber that opens into an external space. In particular, it is advantageous if this section of the hose is located outside the battery module containing the at least one battery cell, or outside a module housing in which the at least one battery cell is located. The portion of the hose connected to the accessible cell degassing vent can be located within the module housing. The specific perforated section of the hose can also be located within the interior of a battery housing. This allows the gas discharged through the hose to enter the battery compartment, but prevents particles that could cause the arcing described earlier from entering.

[0025] The specific hose section with the perforations can be located at an end of the hose opposite the closed end, or in principle at another location.

[0026] According to a further advantageous embodiment of the invention, the inlet opening can be opened in the event of degassing of the at least one battery cell by pressurizing the flap with the gas escaping from the releasable cell degassing opening. The flap is thus designed to open passively in the event of degassing, namely by being flipped open by the gas pressure of the gas escaping from the releasable cell degassing opening, e.g., by pressure-induced bending. This ensures that the flap opens in a situationally adapted manner, in particular without the need for a control mechanism or similar.

[0027] According to a further advantageous embodiment of the invention, the flap is connected at a connection point to a hose section facing at least one battery cell and is pivotable around the connection point to open the inlet. The flap can be pivoted, for example, by bending it open under gas pressure. In particular, the flap can be formed integrally with this hose section. Except for this connection point, the contour of the flap can be designed, for example, as a weakening in the hose wall, such as a groove, notch, perforation, or similar feature. The connection point can be less weakened or not weakened at all, so that the flap remains firmly connected at the connection point even when open. The open flap simultaneously provides a steering effect to the gas entering the hose through the inlet opening.

[0028] According to a further embodiment of the invention, the connection point faces the closed end of the hose. This ensures that the steering effect provided by the flap is in accordance with the desired flow direction, which is determined by the positioning of the closed end of the hose.

[0029] According to a further advantageous embodiment of the invention, the battery arrangement comprises a battery module that includes the at least one battery cell and a module cover, wherein the hose is arranged at least partially between the at least one battery cell and the module cover. Thus, the hose can be positioned extremely close to the at least one battery cell, and the connection to the accessible cell vent is particularly simple. Due to the hose's foldability, it can also be easily positioned between the module cover and the at least one battery cell. The hose does not need to be completely located between the module cover and the at least one battery cell, but can, for example, also extend out of the module housing encompassing the module cover, for instance with its open end.

[0030] Accordingly, the battery module can comprise a module housing, which in turn includes the module cover. The module housing can also be provided, for example, simply as a frame and / or a clamping device or similar. Furthermore, the module cover can be detachably attached to the rest of the module housing, for example, by clipping it on. This allows the module cover to be pushed away from the at least one battery cell when the hose is deployed. In other words, the deploying hose can lift the module cover. Above the module cover, there can be a battery cover of a battery housing. This cover can be positioned at a distance from the module cover when the hose is not deployed.This provides the module cover with space to lift when the hose unfolds, which can then be advantageously used to allow the hose to expand and increase its height in the first direction. The lifting of the module cover can also occur, for example, solely based on the gas pressure caused by the gas entering the hose during the degassing of at least one battery cell.

[0031] According to a further advantageous embodiment of the invention, a cover, in particular a plastic cover, is arranged on the at least one battery cell, with the hose being attached to the cover. If the battery or battery module comprises several battery cells, this cover can extend over the multiple battery cells, for example, of an identical cell stack. Attaching the hose to the cover ensures that the hose is held securely in position, especially during degassing. This prevents displacement of the hose during rupture and achieves the most complete possible connection between the channel provided by the hose and the open rupture membrane, or more generally, the released cell degassing vent.

[0032] The cover can, for example, simultaneously serve as a holder for cell connectors, via which the cell poles of several battery cells are electrically contacted with each other, and / or as a carrier for a circuit board, in particular a flexible circuit board for guiding sensor lines or similar.

[0033] Furthermore, the hose may also include embossed contours to facilitate gas entry into the hose. These contours may, for example, be located around the hose's inlet openings or project outside the hose towards the releaseable cell degassing port to facilitate connection to the releaseable cell degassing port.

[0034] Furthermore, the invention also relates to a battery with a battery arrangement according to the invention or one of its embodiments. The battery can, for example, be designed as a high-voltage battery. The battery can, for example, be a battery for a motor vehicle, in particular a traction battery. However, the battery can also be used in other applications such as electrical appliances, mobile phones, and so on. The battery can also be a stationary energy storage device.

[0035] Furthermore, the invention also relates to a motor vehicle with a battery arrangement according to the invention or one of its embodiments.

[0036] The motor vehicle according to the invention is preferably designed as a motor vehicle, in particular as a passenger car or truck, or as a passenger bus or motorcycle.

[0037] The invention also includes further developments of the battery and the motor vehicle according to the invention, which have features already described in connection with the further developments of the battery arrangement according to the invention. For this reason, the corresponding further developments of the battery and the motor vehicle according to the invention are not described again here.

[0038] The invention also includes combinations of the features of the described embodiments. The invention therefore also includes realizations that each exhibit a combination of the features of several of the described embodiments, provided that the embodiments have not been described as mutually exclusive.

[0039] The following are exemplary embodiments of the invention described. This is illustrated by: Fig. 1 a schematic representation of a battery arrangement with a folded hose according to an embodiment of the invention; Fig. 2 a schematic representation of the battery arrangement Fig. 1 with the hose unfolded in the event of degassing according to an embodiment of the invention; Fig. 3 a schematic representation of a degassing channel in the form of a hose in a top view from below according to an embodiment of the invention; and Fig. 4 A schematic representation of a battery module for a battery arrangement in a top view according to an embodiment of the invention.

[0040] The exemplary embodiments described below are preferred embodiments of the invention. In these exemplary embodiments, the described components each represent individual features of the invention, which can be considered independently of one another and each further develops the invention independently. Therefore, the disclosure is intended to include combinations of features of the embodiments other than those shown. Furthermore, the described embodiments can also be supplemented by further features of the invention already described.

[0041] In the figures, identical reference symbols denote functionally equivalent elements.

[0042] Fig. Figure 1 shows a schematic representation of a battery arrangement 10 according to an embodiment of the invention. In this example, the battery arrangement 10 is provided in the form of a battery 12, for example, a high-voltage battery. The battery arrangement 10 comprises a battery housing 14 with a housing tray 14a and a housing cover 14b arranged thereon. The battery housing 14 contains an interior space 14c in which a battery module 16 is arranged. The battery module 16 can also comprise a module housing 18 with a module cover 18a. A cell stack 20 with several battery cells 22 arranged side by side in the x-direction is arranged in an interior space 18b of the module housing 18. Each of the battery cells has a releasable cell vent 24. In this example, the releasable cell vents 24 are arranged on a top surface of the respective battery cell 22.Alternatively, these could also be arranged on the underside of the respective battery cell 22, and the other components of the degassing system, which will be explained in more detail below, could also be located there. The battery arrangement 10 advantageously includes a degassing channel 26 in the form of a flexible hose 26. This hose is arranged between the battery cells 22 and the module cover 18a. The hose 26 is made of a metallic material, for example, stainless steel foil. Due to its flexibility, the hose 26 can be compressed or folded. The hose 26 can also be positioned below the battery module 20. For example, it can be located below the battery module 20 and above an underride guard of the vehicle. In the illustration according to... Fig. 1 the hose 26 is in a folded state Z1.

[0043] Fig. Figure 2 shows a schematic representation of the battery arrangement 10. Fig. 1, in the case of degassing of a thermally continuous battery cell 22a, where the hose 26 is now in the unfolded state Z2. In the unfolded state Z2, it has a greater height h2 in the z-direction than in the folded state Z1, in which it has a height h1 in the z-direction. The hose 26 can alternatively or additionally unfold in the y-direction along its width. Normally, i.e., when there is no degassing, the hose 26 lies, for example, flattened or folded on the cells 22. Furthermore, the hose 26 is closed at one end 26a to determine the flow direction R in the hose 26, as in Fig. Figure 2 illustrates this. To allow the gas 30 escaping from a releasable cell degassing opening 24 in the event of degassing to enter the interior 32 of the hose 26, the hose 26 comprises an associated inlet opening 34 for each releasable cell degassing opening 24, which can be closed by means of a flap 36 or is closed in the normal state. Fig. 1 are the flaps 36, which are not explicitly shown, each in their closed state, while in the Fig. In the degassing scenario shown in Figure 2, the flap 36 associated with the outgassing cell 22a is open accordingly. Such a flap 36 can be opened, for example by bending, by the gas pressure of the escaping gas 30. The flaps 36 can therefore be selectively forced open in the degassing channel 26 by the TP gas 30. The degassing channel 26 is then inflated by the TP gas 30. This fills the maximum available free space, especially in the z-direction.

[0044] The respective flap 36 is connected to the remaining hose 26 at a connection area 38 and remains connected to the hose 26 at this connection area 38 even in the event of degassing. The movable flap 36 is connected via the connection area 38 in the direction of the closed hose end 26a. The end of the flap 36 connected to the remaining hose 26 is therefore closer to the closed hose end 26a with respect to the longitudinal direction of the hose 26 than the end of the flap 36 that detaches from the remaining hose 26 in the event of degassing. The flap 36 can thus be lifted or opened by the gas 30 in the event of degassing. The escaping gas 30 then flows over the still closed flaps or at least some of the closed flaps 36 of the still intact cells 22, whose rupture membranes, that is, their releasable cell degassing openings 24, are protected by the still closed flaps 36.Opposite the closed hose end 26a, an open hose end 26b is arranged. This can, for example, lead into a degassing channel, into an external space 40 outside the battery housing 14, or similarly. According to another variant, the hose 26 can also be closed at both ends, i.e., at both ends 26a and 26b, and form a sieve outside the module 18 via perforations (not shown). This allows the gas 30 to enter the battery compartment 14c outside the module 16, but prevents particles from being introduced. Alternatively, the entire hose 26 can be provided as a separate component and inserted into the battery assembly 10, or it can be designed as a kind of open structure, similar to a gutter, and then closed by other parts of the existing battery assembly 10 structure.

[0045] Furthermore, the battery arrangement 10 or the hose 26 can be designed such that, in the event of degassing and the transition to the unfolded state Z2, it can lift the module cover 18a towards the battery cover 14b or in the z-direction and thus away from the battery cells 22. This allows the hose 26 to further increase its cross-section. Fig. 2 shows the module cover 18a in such a raised state. This allows a gap 42 present in the unraised state (cf. Fig. 1) between the battery cover 14b and the module cover 18a to maximize the flow cross-section of the hose 26 in the unfolded state Z2.

[0046] Fig. Figure 3 shows a schematic representation of hose 26 in a schematic top view from below, i.e. in the z-direction, and Fig. Figure 4 shows a portion of the battery module 16 with the cell stack 20 in a top view, i.e., opposite the z-direction, but without the module cover 18a shown. The accessible cell vents 24 of the respective cells 22 are particularly visible, as are the respective cell terminals 44 of the cells 22, which in this example are also located on the same side of the cell as the accessible cell vents 24. A cover 46, for example a plastic cover, can be arranged over the cell stack 20 and the battery cells 22. This cover can have corresponding recesses 46a for the accessible cell vents 24, as well as corresponding recesses 46b for the cell terminals. The cover 46 can optionally also serve as a carrier for the cell connectors, via which the cells 22 can be electrically contacted. The cover 46 can accordingly also be referred to as a busbar carrier.Flexible printed circuit boards (FPCs) can also be guided on this carrier 46. The hose 26 can advantageously be positioned on this carrier 46 and, in particular, connected to it. This allows the hose 26 to be advantageously fixed to the battery module 16. It is therefore advantageous if the metal hose 26 is connected to the plastic cover 46 on the cells 22 in order to prevent displacement in the event of a rupture and to achieve the most complete possible connection between the channel, in particular the interior 32 of the hose 26, and the open rupture membrane 24.

[0047] The hose 26 is arranged in relation to the battery module 16 such that the inlet openings, which are closed or can be closed by the respective flaps 36, connect directly to the accessible cell degassing openings 24 and are located directly above them in the z-direction. Fig.Figure 3 illustrates in particular the respective connection area 38 for each flap 36, via which the respective flap 36 is firmly connected to the remaining hose 26. The remaining flap contour 48, shown here as a dashed line, can be designed as a material weakening in the hose wall 26c facing the battery module 16, for example as a notch, cut, perforation or the like.

[0048] Overall, the examples demonstrate how the invention can provide a TP (thermostatic discharge) outgassing channel for cell modules or a high-voltage battery. The use of a stainless steel hose open at one end, with opening flaps on the rupture membranes, ensures a directed flow of TP gas and prevents contamination of the module or battery interior with metallic particles. The hose inflates due to the gas pressure, and the undamaged rupture membranes are protected from the hot gases by the closed flaps on the hose. The gas flow, including particles, is directed out of the module or high-voltage battery. The risk of arcing is significantly reduced. Rupture membranes of healthy or still intact cells are protected. The space required in the high-voltage battery is minimized.The hose, for example, lies folded or flattened between the cells and the module cover and inflates due to the TP gas. In doing so, it can lift the module cover towards the battery cover to increase its cross-section. QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] DE 10 2013 204 087 A1

[0004] EP 4 156 365 A1

[0006] DE 10 2012 212 457 A1

[0008]

Claims

[1] Battery arrangement (10) with a degassing channel (26) for the discharge of a gas (30) escaping from a battery cell (22) of the battery arrangement (10), wherein the battery arrangement (10) comprises - comprising at least one battery cell (22) which includes a releasable cell vent (24), and - the degassing channel (26) which has a releaseable or released inlet opening (34) connected to the releaseable cell degassing opening (24), characterized by , that - the degassing channel (26) is designed as an at least partially flexible hose (26) that can be transformed from a folded state (Z1) to an at least partially unfolded state (Z2) in which the hose (26) has a greater height (h2) and / or width than in the folded state (Z1); and - the hose (26) has a flap (36) which, in a closed state (Z1), closes the inlet opening (34), and by means of which the inlet opening (34) can be released in the event of degassing of the at least one battery cell (22). [2] Battery arrangement (10) according to claim 1, characterized by , that the hose (26) is made of a metallic material, in particular steel or stainless steel. [3] Battery arrangement (10) according to any one of the preceding claims, characterized by , that the hose (26) is closed at at least one hose end (26a), in particular wherein the at least one battery cell (22) is received in a receiving space (18b; 14c) of the battery arrangement (10), and the hose (26) is led with its open hose end (26b) into an area outside the receiving space (18b; 14c). [4] Battery arrangement (10) according to any of the preceding claims, characterized by, that the hose (26) includes perforations in a specific hose area which are designed to retain particles contained in a gas (30) escaping from the battery cell (22) in the event of degassing inside (32) the hose (26). [5] Battery arrangement (10) according to any of the preceding claims, characterized by , that the inlet opening (34) can be released in the event of degassing of the at least one battery cell (22) by pressurizing the flap (36) with the gas (30) escaping from the releasable cell degassing opening (24). [6] Battery arrangement (10) according to any of the preceding claims, characterized by , that the flap (36) is connected at a connection point (38) to one of the hose sections (26c) facing at least one battery cell (22) and is pivotable around the connection point (38) to release the inlet opening (34). [7] Battery arrangement (10) according to any of the preceding claims, characterized by , that the connection point (38) faces the closed end of the hose (26a). [8] Battery arrangement (10) according to any of the preceding claims, characterized by , that the battery arrangement (10) comprises a battery module (16) comprising the at least one battery cell (22) and a module cover (18a), wherein the hose (26) is arranged at least partially between the at least one battery cell (22) and the module cover (18a). [9] Battery arrangement (10) according to any of the preceding claims, characterized by , that a cover (46), in particular a plastic cover (46), is arranged on the at least one battery cell (22), wherein the hose (26) is attached to the cover (46). [10] Motor vehicle with a battery arrangement (10) according to one of the preceding claims.

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