Gas guide, exhaust unit and battery case unit for battery

Abstract

The invention relates to a gas guide (1) for a battery (4), comprising a gas guide channel (7) having an inlet (8) and an outlet (9), the inlet (8) being provided for connection to a gas outlet unit (5) arranged at a gas outlet (10) of a battery housing (6). According to the invention, the gas guide (1) comprises: a plurality of frame parts (13) at the inlet (8); and a plurality of spring clips (14) for forming a clamping connection between a respective frame portion (13) and a respective frame portion (15) of the gas outlet unit (5). The invention further relates to a venting unit (2) and a battery housing unit (3) for a battery (4).

Description

TECHNICAL FIELD

[0001] The invention relates to a gas guide for a battery, to an exhaust unit for a battery and to a battery housing unit for a battery according to the features of the preamble of claim 1. BACKGROUND

[0002] As described in US 2012 / 0231306 A1, a gas exhaust system for a battery pack is disclosed in the prior art. A thermal management system for minimizing the effects of thermal runaway within a battery pack consists of a sealed battery pack housing configured for housing a plurality of batteries, wherein the battery pack housing is divided into a plurality of sealed battery pack bays. The system further comprises a plurality of exhaust assemblies integrated into the sealed battery pack bays and each comprising a valve and an outlet integrated into an outer wall of the battery pack bay. Each valve is configured to seal the outlet under normal operating conditions and to open the outlet when thermal runaway occurs in at least one of the batteries within the battery bay. SUMMARY

[0003] It is the task of the present invention to provide a gas guide for a battery, an exhaust unit for a battery and a battery housing unit for a battery which are improved with respect to the prior art.

[0004] According to the invention, the task is accomplished by a gas guide for a battery having the features of claim 1, by an exhaust unit for a battery having the features of claim 7 and by a battery housing unit for a battery having the features of claim 9.

[0005] Advantageous embodiments of the invention are the subject of the dependent claims.

[0006] A gas guide for a battery has a gas guide channel with an inlet and an outlet, wherein the inlet is provided for connection to a gas outlet unit arranged at a gas outlet of a battery housing.

[0007] According to the invention, the gas guide has a plurality of frame portions and a plurality of spring clips at the inlet for forming a clamping connection, in particular a form- and / or force- locking connection, between each of the frame portions and a corresponding frame portion of the gas outlet unit. The corresponding spring clips can also be referred to as clips or spring clips, for example. For example, two spring clips are provided, so that two, in particular opposite, frame portions are provided on the gas guide and, correspondingly, two, in particular opposite, frame portions are also provided on the gas outlet unit, i.e. on two, in particular opposite, radial sides, respectively.

[0008] The gas outlet unit according to the application has such a gas guide and a gas outlet unit having a plurality of frame parts. In one possible embodiment, the gas outlet unit has a rupture disc which is at least partially surrounded by the frame parts. The gas guide is thus engageable, connectable or connectable to the gas outlet unit by means of a spring clip.

[0009] The battery housing unit according to the application for a battery has a battery housing and at least one such gas outlet unit, wherein the gas outlet unit of the gas outlet unit is arranged at the gas outlet of the battery housing. The battery housing unit has, for example, a plurality of such gas outlet units, for example two, three, four or more gas outlet units. The battery housing then has a corresponding or corresponding number of gas outlets, at each of which one gas outlet unit is arranged.

[0010] The battery advantageously has such a battery housing unit and battery cells arranged in the battery housing, which are electrically connected to one another. The battery is in particular a drive battery for a vehicle, in particular for powering at least one drive motor of a vehicle.

[0011] The vehicle advantageously has at least one such battery.

[0012] The solution is necessary, in particular, to discharge the gas formed as a result of the battery cell venting. This is also referred to as venting or thermal delay or thermal propagation. The gas is guided out of the battery via a venting path. The gas guide forms the venting path or is an integral part of the venting path.

[0013] The gas has a relatively high temperature, for example approximately 600°C, and is accompanied by a high flow rate. The gas can damage other components in the vehicle when it is discharged from the battery gas outlet, also referred to as emergency vent. In order to avoid this and to discharge the gas from the battery in a targeted manner, the gas guide is provided. The gas guide is advantageously designed to direct the gas to the road surface. Furthermore, the gas guide is advantageously designed to meet structural requirements, in particular with regard to corrosion protection. Since the gas guide is not directly mounted on the battery housing, for example by means of a bolt connection, corrosion of the battery housing at the respective location can be avoided.

[0014] Specifically, a leak test is specified for the battery. During this process, the battery is kept underwater for a predetermined time and must be sealed; that is, no water ingress is allowed during this period. The leak test is conducted without the one or more venting components, i.e., the venting components or their corresponding components can only be installed on the battery after the leak test. This solution allows for simple installation and, if necessary, easy removal of the one or more venting components. This is achieved, in particular, by means of a spring clip solution. With the aid of the spring clip, the venting component can be connected to the gas outlet unit as a single unit. This connection is specifically made only between the gas outlet unit and the venting component. In particular, no additional fasteners are required on the battery casing for this purpose. The corrosion protection of the battery casing is therefore not adversely affected.

[0015] The spring clip can be moved from an open state to a closed state, for example, manually or automatically (e.g., with the aid of an assembly robot), especially by simple linear displacement. For example, this requires no tools or only simple tools to apply force to the spring clip to move it. Similarly, simple disassembly can be performed, i.e., returning the spring clip from the closed state to the open state. For safety reasons, it can be stipulated that the spring clip must first be unlocked from its locked position in the closed state to return it to the open state. That is, the spring clip is locked in the closed state, especially to prevent the spring clip from accidentally moving back to the open state, thereby preventing the gas guide from accidentally detaching from the gas outlet unit. In one possible implementation, for example, it can be stipulated that the spring clip is also locked to the corresponding frame portion of the gas guide in the open state. This allows for pre-assembly of the spring clip on the gas guide, so that for connection to the gas outlet unit, it is only necessary to place the inlet of the gas guide on the gas outlet unit and move the spring clip, already placed on the gas guide, to the closed state.

[0016] Due to the high temperature of the gas (e.g., up to 900°C), alternative bonding methods using adhesives / bonding are not feasible. Furthermore, such bonding would hinder disassembly.

[0017] The gas guide provides reliable gas guidance because it does not create additional gaps. It does not provide a point of corrosion attack because it advantageously does not connect directly to the battery casing, but only to the gas outlet unit. Therefore, it also avoids, for example, wear on the battery casing coating and the resulting risk of corrosion. Furthermore, the installation and, for example, removal of the gas guide do not require tools.

[0018] The air guide components, especially their air guide channels, are made of polyphenylene sulfide (PPS-GF40) containing 40% glass fiber, for example.

[0019] The corresponding spring clips are made of spring steel (e.g., C67S).

[0020] The frame portion of the gas outlet unit is advantageously spaced apart from the battery casing. This allows the corresponding spring clips to engage with the corresponding frame portion without contacting the battery casing, thereby preventing, for example, damage to the anti-corrosion coating of the battery casing. Furthermore, this advantageously avoids dirt accumulation between the gas guide and the battery casing, and the resulting risk of battery casing corrosion. For example, the distance between the battery casing and the gas guide (especially its corresponding spring clip) and / or between the battery casing and the corresponding frame portion of the gas outlet unit is 1 mm to 5 mm, preferably 2 mm to 3 mm.

[0021] In one possible implementation, the air duct of the air guide is configured in a curved / bent shape. This allows the gas to be directed downwards towards the road surface, as the air outlet is formed, in particular, in the sidewall of the battery casing, from which the gas is discharged laterally and then directed downwards towards the road surface through the curved air duct. This curvature also prevents particles from the road surface and, especially, high-pressure water jets during vehicle washing, from directly impacting the gas outlet unit, and in particular, from directly impacting its rupture disc and potentially damaging it. For example, the curvature is designed such that the downward-facing portion of the air duct is oriented at an angle ranging from approximately 10° to 16° relative to the vertical direction, preferably at 13°, and particularly at this angle inclined towards the battery (especially the battery casing) relative to the vertical direction. For example, the air duct of the air guide can be designed, for instance, to have an S-shaped orientation (e.g., in a side view or side section view of the air guide), thereby guiding the hot gas to the bottom of the vehicle corresponding to the outer contour of the casing, and by its design preventing direct water ingress.

[0022] The spring clips each have a U-shaped clamp for engaging the frame portion of the gas guide and the frame portion of the gas outlet unit from the edge side. This allows them to be moved to the closed position easily, especially by linear displacement in the inlet radial direction. The engagement from the edge side also achieves a reliable form-locking connection in the inlet axial direction between the edge portion of the gas guide and the edge portion of the gas outlet unit, and further between the gas guide and the gas outlet unit.

[0023] To lock the corresponding spring clip in the open state, the spring clip, for example, has a locking structure on the corresponding spring leg of the U-shaped clamp, particularly in its end region or halfway facing the free end. The locking structures of the two spring legs face each other, and the corresponding frame portion of the gas guide has locking grooves on opposite sides, wherein the locking grooves are located radially outside the connection area for connection with the gas outlet unit. Thus, in the open state, the corresponding spring clip is reliably locked onto the gas guide, particularly its corresponding frame portion, by engaging the corresponding locking structure into the corresponding locking groove. This allows the spring clip to be pre-assembled onto the corresponding frame portion of the gas guide. Therefore, to connect to the gas outlet unit, it is only necessary to place the inlet of the gas guide onto the gas outlet unit and move the spring clip to the closed state.

[0024] To lock the corresponding spring clip in the closed state, the corresponding frame portion of the gas guide has, for example, another locking groove located radially in the connection area for connection with the gas outlet unit, and axially in the back of the corresponding frame portion of the gas guide away from the inlet. In the closed state, a locking structure for the spring leg, or, for example, another locking structure closer to the end of the spring leg, located axially in the back of the frame portion of the gas guide away from the inlet, engages with said other locking groove.

[0025] Alternatively or additionally, for example, it can be specified that, in order to lock the corresponding spring clip in the closed state, the corresponding frame portion of the gas guide has a locking protrusion, which is located radially inward, particularly within the connection area for connection with the gas outlet unit, offset inwardly from another locking groove, and axially inwardly on the back side of the corresponding frame portion of the gas guide opposite to the inlet, protruding axially from the back side. The spring clips each have extensions of spring legs, wherein the extensions have locking tabs protruding from the extensions to the other spring leg. This achieves an alternative or additional locking of the spring clips on the frame portion of the gas guide in the closed state, thereby ensuring reliable retention of the corresponding spring clips in the closed state. This particularly prevents the corresponding spring clips from accidentally returning to the open state, thus preventing the gas guide from detaching from the gas outlet unit.

[0026] In one possible implementation, multiple protrusions or at least one protrusion are formed on the side of the corresponding frame portion of the gas guide facing the gas outlet unit, and the spring leg fastened to the frame portion of the gas outlet unit has a protrusion. These protrusions and the protrusion of the spring clip are visible when viewed from the side in the intermediate area between the battery casing and the gas guide. Therefore, the relative position, especially the distance, between the corresponding protrusion and the corresponding spring clip protrusion can be used to identify whether the spring clip is in an open or closed state. This allows determination of whether the spring clip is in an open state before the gas guide is installed so that installation can proceed, and whether it is in a closed state after installation to ensure successful completion of the installation. This determination can also be performed, for example, by means of imaging methods, especially video monitoring, thereby enabling, for example, automated installation or at least automated checks for correct installation. For example, after the gas guide is installed, a camera can be used to check whether the corresponding spring clip is in a closed state, thereby confirming that the gas guide is correctly positioned on the gas outlet unit.

[0027] In other embodiments, it may be specified that these protrusions and protrusions are not present on the spring legs of the corresponding spring clips, in particular to ensure that there is sufficient clearance between the air guide or its spring clip and the battery casing, thereby avoiding, for example, the risk of damage to the battery casing coating and the resulting risk of corrosion. Attached Figure Description

[0028] The embodiments of the present invention will be explained in detail below with reference to the accompanying drawings, wherein:

[0029] Figure 1 A schematic perspective view of the battery is shown.

[0030] Figure 2 The diagram schematically shows an enlarged view of a portion of the battery within the air guide area.

[0031] Figure 3 The diagram schematically shows a side view of the air guide.

[0032] Figure 4 The diagram schematically shows a rear top view of the gas guide arranged at the gas outlet unit of the battery.

[0033] Figure 5 The diagram schematically shows a cross-sectional view of a gas guide disposed at the gas outlet unit of the battery.

[0034] Figure 6 schematically shown Figure 5 A magnified view of the left side area.

[0035] Figure 7 schematically shown Figure 5 A magnified view of the right-hand area.

[0036] Figure 8A top view schematically illustrating one embodiment of a gas guide arranged at the gas outlet unit of a battery.

[0037] Figure 9 schematically shown Figure 8 A magnified view of the left side area.

[0038] Figure 10 schematically shown Figure 8 A magnified view of the right-hand area.

[0039] Corresponding components are labeled with the same reference numerals in all drawings. Detailed Implementation

[0040] The following will combine Figures 1 to 10 To describe for such Figure 1 and Figure 2 The exemplary battery 4 includes a venting component 1, an exhaust unit 2, and a battery casing unit 3. The battery 4 is located in... Figure 1 The example shown is illustrated in the text. Figure 2 Show Figure 1 A magnified view of a portion of the air guide 1 area. Figure 3 A side view of the air guide 1 is shown.

[0041] The air guide 1 is a component of the exhaust unit 2, which also has a gas outlet unit 5, and the exhaust unit 2 is a component of the battery casing unit 3. Figure 4 A rear view of the gas guide 1 installed on the gas outlet unit 5 is shown, wherein the gas outlet unit 5 is located at the gas outlet 10 of the battery casing 6 of the battery casing unit 3. Figure 5 As shown in the cross-sectional view, the gas outlet unit 5 in the illustrated example has a rupture disc 11 and a frame 12 that at least partially surrounds the rupture disc 11.

[0042] Battery 4 has a battery housing unit 3, wherein battery cells are housed within the battery housing 6 and are electrically connected to each other. In the example shown, the battery housing 6 has four vents 10. Therefore, four exhaust units 2 are provided.

[0043] Battery 4 is particularly a vehicle drive battery, especially for powering at least one vehicle drive motor. Battery 4 is particularly located in the vehicle floor area.

[0044] The vent 10 and venting unit 2 within the battery casing 6 are essential for discharging the gas generated by the battery cell exhaust. This is also referred to as venting, thermal delay, or thermal propagation. The gas is discharged from the battery 4 through the venting path. The venting guide 1 forms or is a component of the venting path. The venting guide 1 has a venting channel 7 with an inlet 8 and an outlet 9, wherein the inlet 8 is configured to connect to the gas outlet unit 5 located at the vent 10 of the battery casing 6.

[0045] The gas has a relatively high temperature (e.g., approximately 600°C) and a high flow rate. When the gas is expelled from the corresponding vent 10 (also called an emergency vent) of the battery 4, it may damage other components within the vehicle. To avoid this and to selectively expel the gas from the battery 4, the gas guide 1 is provided. The gas guide 1 is advantageously designed to direct the gas towards the road surface. Furthermore, the gas guide 1 is advantageously designed to meet structural requirements, particularly those related to corrosion protection.

[0046] Specifically, a leak test is specified for battery 4. During this process, battery 4 must be kept underwater and sealed for a predetermined period of time, meaning that water ingress must not occur during this period. The leak test is conducted without the need for the venting component 1; that is, the venting component 1 can only be installed after the leak test.

[0047] To achieve this in a simple manner, the corresponding air guide 1 has a plurality of (two in the illustrated example) frame portions 13 at the inlet 8, and a corresponding number of spring clips 14 for forming a clamping connection between one of the corresponding frame portions 13 and a corresponding frame portion 15 of the frame 12 of the gas outlet unit 5, and thus, in particular, a form-locking connection and / or a force-locking connection. The corresponding spring clips 14 may also be referred to as clips or spring clamps, for example. The two frame portions 13 and spring clips 14 of the air guide 1 are opposite each other in the illustrated example.

[0048] The spring clip 14 facilitates simple installation and, if necessary, also allows for easy disassembly of the corresponding gas guide 1. The gas guide 1 can be connected to the gas outlet unit 5 as a single unit using the spring clip 14. This connection is specifically implemented between the gas outlet unit 5 and the gas guide 1. In particular, this eliminates the need for additional fasteners on the battery casing 6. Therefore, the corrosion protection of the battery casing 6 is not adversely affected.

[0049] The spring clip 14 can be moved from an open state OZ to a closed state GZ, for example, manually or automatically (e.g., with the aid of an assembly robot), especially by simple linear movement. For example, no tools are required or only simple tools are needed to apply force to the spring clip 14 to move it.

[0050] For example, simple disassembly can also be achieved in a similar manner, i.e., by returning the spring clip 14 from the closed state GZ to the open state OZ. For safety reasons, in this example, it is specified that the spring clip 14 must first be unlocked from the locked position in the closed state GZ to return it to the open state OZ. That is, the spring clip 14 is locked in the closed state GZ, especially to prevent the spring clip 14 from accidentally returning to the open state OZ, thereby preventing the gas guide 1 from accidentally detaching from the gas outlet unit 5.

[0051] In the illustrated embodiment, the spring clip 14 is also locked onto the corresponding frame portion 13 of the gas guide 1 in the open state OZ. This achieves pre-assembly of the spring clip 14 on the gas guide 1, so that in order to connect to the gas outlet unit 5, it is only necessary to place the inlet 8 of the gas guide 1 on the gas outlet unit 5 and move the spring clip 14, which has been placed on the gas guide 1, to the closed state GZ.

[0052] Figure 4 and Figure 5 The left spring clip 14 in the closed state GZ and the right spring clip 14 in the open state OZ are shown respectively. Figure 6 Show Figure 5 A magnified view of the left spring clip 14 region of GZ in the closed state. Figure 7 Show Figure 5 A magnified view of the right-side spring clip 14 area of ​​OZ in the open state.

[0053] The gas guide 1 achieves reliable gas guidance because it does not create additional gaps. Furthermore, it is free from corrosion attack points because it is advantageously not directly connected to the battery casing 6, but only to the gas outlet unit 5. Therefore, for example, wear on the coating of the battery casing 6 and the resulting risk of corrosion are also avoided.

[0054] The air guide 1, especially its air guide channel 7, is made of polyphenylene sulfide (PPS-GF40) containing 40% glass fiber, for example.

[0055] The corresponding spring clip 14 is made of spring steel (e.g., C67S).

[0056] The frame portion 15 of the gas outlet unit 5 is advantageously arranged at a distance from the battery casing 6 such that the corresponding spring clip 14 can be fastened to the corresponding frame portion 15, preventing the spring clip 14 from contacting the battery casing 6, thereby avoiding, for example, damage to the anti-corrosion coating of the battery casing 6. Furthermore, this advantageously avoids dirt deposition between the gas guide 1 and the battery casing 6, and the resulting risk of corrosion of the battery casing 6. For example, the distance between the battery casing 6 and the gas guide 1 (especially its corresponding spring clip 14) is 2 to 3 millimeters.

[0057] The air guide channel 7 of the air guide component 1 is curved / bent at an angle, such as... Figures 1 to 5 As shown. This specifically achieves the downward guidance of gas to the road surface, because the vent 10 is formed, in particular, in the sidewall 16 of the battery casing 6, allowing the gas to exit laterally from there, and then be directed downward to the road surface through the curved / angled air guide channel 7. This curvature also ensures that particles from the road surface, and especially high-pressure water jets during vehicle washing, do not directly impact the gas outlet unit 5, and in particular, do not directly impact its rupture disc 11 and potentially damage it. For example, the curvature is designed such that the downward-facing portion of the air guide channel 7 is oriented at an angle of 13° relative to the vertical direction, and in particular, inclined at this angle towards the battery casing 6 relative to the vertical direction, especially as... Figure 3 As shown.

[0058] The spring clips 14 each have a U-shaped clamp 17 for engaging the frame portion 13 of the air guide 1 and the frame portion 15 of the gas outlet unit 5 from the edge side / around the edge. This allows them to be moved easily to the closed state GZ, especially by linear movement in the radial direction of the inlet 8. Furthermore, by engaging from the edge side, a reliable form-locking connection is achieved between the edge portion 13 of the air guide 1 and the edge portion 15 of the gas outlet unit 5, and further between the air guide 1 and the gas outlet unit 5, in the axial direction of the inlet 8.

[0059] To lock the corresponding spring clip 14 in the open state OZ, in the illustrated example, the spring clip 14 has a snap-fit ​​structure (einrastausformung) 19 at the corresponding spring leg 18 of the U-shaped clamp 17, particularly in the end region or within half of the spring leg 18 facing the free end. The snap-fit ​​structures 19 of the two spring legs 18 face each other. The corresponding frame portion 13 of the air guide 1 has snap-fit ​​grooves 20 on opposite sides, wherein the snap-fit ​​grooves 20 are located radially outside the connection area for connection with the gas outlet unit 5 in the inlet 8. Thus, the corresponding spring clip 14 is reliably locked onto the air guide 1, especially its corresponding frame portion 13, by snapping the corresponding snap-fit ​​structure 19 into the corresponding snap-fit ​​groove 20 in the open state OZ. This allows the spring clip 14 to be pre-assembled onto the corresponding frame portion 13 of the air guide 1. Therefore, to connect to the gas outlet unit 5, it is only necessary to place the inlet 8 of the air guide 1 onto the gas outlet unit 5 and move the spring clip 14 to the closed state GZ.

[0060] To lock the corresponding spring clip 14 in the closed state GZ, the corresponding frame portion 13 of the air guide 1 has, for example, another locking groove 21, which is located radially in the connection area for connection with the gas outlet unit 5 in the inlet 8, and axially in the inlet 8 on the back side of the corresponding frame portion 13 of the air guide 1 opposite to the inlet 8. In the closed state GZ, the locking structure 19 of the spring leg 18, which is located axially in the inlet 8 on the back side of the frame portion 13 of the air guide 1 opposite to the inlet 8, or another locking structure 22 closer to the end of the spring leg 18 in the illustrated example, engages with the other locking groove 21.

[0061] In the illustrated example, the snap-in grooves 20 and 21 are formed in a wave-like shape on the back of the corresponding frame portion 13 of the air guide 1, wherein the snap-in grooves 20 and 21 are respectively formed as troughs. In the illustrated example, another trough is formed between the two snap-in grooves 20 and 21, and another snap-in structure 22 is arranged in the other trough in the open state OZ of the spring clip 14, so that the snap-in structure 19 can snap into the snap-in groove 20.

[0062] To lock each spring clip 14 in the closed state GZ, each frame portion 13 of the air guide 1 is provided with a snap-fit ​​protrusion 23. This snap-fit ​​protrusion is radially offset inward relative to another snap-fit ​​groove 21 in the connection area for connection with the gas outlet unit 5, and axially located on the back side of each frame portion 13 of the air guide 1 opposite to the inlet 8, protruding axially from the back side. Each spring clip 14 has an extension 24 of a spring leg 18, which is arranged on the back side of the frame portion 13 of the air guide 1. The extension 24 has a locking tab 25 protruding from the extension 24 toward the other spring leg 18. In the illustrated example, this is achieved by the extension 24 having a cut, for example, formed by stamping, such that the extension 24 bends inward in the width direction, for example, in the middle or side, i.e., towards the other spring leg 18, thereby forming the locking tab 25. The free end of the locking protrusion 25 faces the U-shaped bottom of the U-shaped spring clip 14, so that when moved to the closed state GZ, it engages with the side of the locking protrusion 23 opposite to the U-shaped bottom of the U-shaped spring clip 14. This achieves additional locking of the spring clip 14 on the frame portion 13 of the gas guide 1 in the closed state GZ, thereby ensuring reliable retention of each spring clip 14 in the closed state GZ. Therefore, it is especially important to prevent each spring clip 14 from accidentally returning to the open state OZ, thereby preventing the gas guide 1 from detaching from the gas outlet unit 5.

[0063] To easily release the locking connection of the closed state GZ, the free end of the extension 24 is bent outward, i.e., spaced apart from the back of the air guide 1. Therefore, the free end of the extension 24 can be manually grasped or hooked with a tool and pulled outward, i.e., away from the air guide 1, so that the locking protrusion 25 and the locking protrusion 23, as well as the other locking structure 22 and the other locking groove 21, can disengage from each other, and then the spring clip 14 can return to the open state OZ. This also allows for the simple disassembly of the air guide 1.

[0064] Figures 8 to 10 One possible implementation is shown, in which protrusions (Dom) 26 are formed on the side of each frame portion 13 of the gas guide 1 facing the gas outlet unit 5, and spring legs 18 fastened to the frame portion 15 of the gas outlet unit 5 have protrusions 27. For example, the free end of the spring leg 18 is correspondingly bent outward, i.e., away from the other spring leg 18. The spring leg 18 is located, for example, in a channel on the corresponding side of the frame portion 13 of the gas guide 1, wherein the protrusion 27 protrudes from the channel. Figure 8 Only the protrusion 27 of the spring clip 14 is shown. Figure 9 The area with the left spring clip 14 is shown, where both the protrusion 27 and the post 26 are shown. Figure 10 The area with the right-side spring clip 14 is shown, where both the protrusion 27 and the protrusion 26 are shown.

[0065] When viewed from the side, the area between the battery casing 6 and the vent 1 is visible, and the protrusion 26 and the spring clip 14 protrusion 27 are both visible. Figure 9 and Figure 10 As shown. Therefore, the relative position, especially the distance, of each protrusion 26 relative to the protrusion 27 of the corresponding spring clip 14 can be used to identify whether the spring clip 14 is in the open state OZ or the closed state GZ. In the example shown, the left spring clip 14 is in the closed state GZ, as... Figure 9 The large distance between the central protrusion 26 and the protrusion 27 is shown, while the right-side spring clip 14 is in the open state OZ, as shown. Figure 10 The small distance between the central convex post 26 and the protrusion 27 is shown.

[0066] Therefore, it can be determined whether the spring clip 14 is in the open state OZ before the gas guide 1 is installed, thus allowing installation to proceed, and whether it is in the closed state GZ after installation, thereby ensuring successful installation. This determination can also be performed using imaging methods, particularly video monitoring, thereby achieving, for example, automated installation or at least automated checks for correct installation. For example, after the gas guide 1 is installed, a camera can be used to check whether each spring clip 14 is in the closed state GZ and whether the gas guide 1 is correctly positioned on the gas outlet unit 5.

[0067] In other embodiments, it may be specified that the protrusions 26 and protrusions 27 are not present on the individual spring clips 14, in particular to ensure that there is sufficient free space between the air guide 1 or its spring clips 14 and the battery casing 6, thereby avoiding, for example, the risk of damage to the coating of the battery casing 6 and the resulting risk of corrosion.

[0068] The features and advantages described herein regarding the air guide are also applicable to the exhaust unit and battery housing unit described herein, and vice versa. Furthermore, the features and advantages of one embodiment are also applicable to another embodiment described herein, and vice versa.

[0069] List of reference numerals

[0070] 1 air guide

[0071] 2 exhaust units

[0072] 3 Battery casing units

[0073] 4 batteries

[0074] 5 Gas outlet unit

[0075] 6 Battery casing

[0076] 7 air channels

[0077] 8 entrances

[0078] 9 Exports

[0079] 10 air outlets

[0080] 11 shrapnel

[0081] 12 frames

[0082] 13. Frame section of the air guide component

[0083] 14 Spring Clips

[0084] Frame section of 15 gas outlet unit

[0085] 16 sidewalls

[0086] 17 U-shaped hoop

[0087] 18 spring legs

[0088] 19-card insertion structure

[0089] 20 clips into the groove

[0090] 21 Another one is inserted into the groove

[0091] 22 Another snap-fit ​​structure

[0092] 23 snap into the convex part

[0093] 24 extensions

[0094] 25-calorie anti-herniation tablets

[0095] 26 protruding pillars

[0096] 27 protrusions

[0097] GZ closed state

[0098] OZ open

Claims

1. A venting member (1) for a battery (4), the venting member having a venting channel (7) having an inlet (8) and an outlet (9), wherein, The inlet (8) is configured to connect to a gas outlet unit (5) located at the gas outlet (10) of the battery casing (6). Its characteristic is that the air guide has: Multiple frame sections (13) at the entrance (8), and Multiple spring clips (14) are used to form a clamping connection between the corresponding frame portion (13) and the corresponding frame portion (15) of the gas outlet unit (5).

2. The air guide (1) according to claim 1, characterized in that, Each of the spring clips (14) has a U-shaped clamp (17) for fastening the frame portion (13) of the gas guide (1) and the frame portion (15) of the gas outlet unit (5) from the edge side.

3. The air guide (1) according to any one of the preceding claims, characterized in that, In order to lock each spring clip (14) in the open position (OZ), The spring clip (14) has a snap-fit ​​structure (19) at each spring leg (18) of the U-shaped clamp (17), wherein the snap-fit ​​structures (19) of the two spring legs (18) face each other, and Each frame portion (13) of the gas guide (1) has a snap-in groove (20) on opposite sides, wherein the snap-in groove (20) is located outside the connection area connected to the gas outlet unit (5) in the radial direction of the inlet (8).

4. The air guide (1) according to claim 3, characterized in that, In order to lock each spring clip (14) in the closed state (GZ), each frame portion (13) of the air guide (1) has another locking groove (21), which is located in the radial direction of the inlet (8) within the connection area connected to the gas outlet unit (5) and in the axial direction of the inlet (8) on the back side of the corresponding frame portion (13) of the air guide (1) opposite to the inlet (8).

5. The air guide (1) according to claim 4, characterized in that, In order to lock each spring clip (14) in the closed state (GZ), Each frame portion (13) of the gas guide (1) has a snap-fit ​​protrusion (23), which is located radially within the connection area connected to the gas outlet unit (5) of the inlet (8) and offset inward relative to the other snap-fit ​​groove (21), and is located axially on the back side of the corresponding frame portion (13) of the gas guide (1) opposite to the inlet (8) and protrudes axially from the back side. One of the spring legs (18) of each spring clip (14) has an extension (24), wherein the extension (24) has a locking tab (25) protruding from the extension (24) to the other spring leg (18).

6. The air guide (1) according to any one of the preceding claims, characterized in that, The air guide channel (7) is formed in a curved manner.

7. An exhaust unit (2) for a battery (4) having an air guide (1) according to any one of the preceding claims and a gas outlet unit (5) having a plurality of frame portions (15).

8. The exhaust unit (2) according to claim 7, characterized in that, The gas outlet unit (5) has a rupture disc (11) that is at least partially surrounded by the frame portion (15).

9. A battery casing unit (3) for a battery (4), comprising a battery casing (6) and at least one venting unit (2) according to claim 7 or 8, wherein, The gas outlet unit (5) of the exhaust unit (2) is arranged at the gas outlet (10) of the battery casing (6).

10. The battery casing unit (3) according to claim 9, characterized in that, The frame portion (15) of the gas outlet unit (5) is arranged to be spaced apart from the battery casing (6).

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