DE102021000684A1 - Energy storage device for a motor vehicle, in particular for a motor vehicle - Google Patents

Abstract

The invention relates to an energy store (10) for storing electrical energy for a motor vehicle, with a housing (12) delimiting a receiving space (16), in the receiving space (16) of which at least one storage element (18) for storing the electrical energy is arranged. A filter device (20) is provided, which is arranged in the receiving space (16) and delimits at least one discharge channel (22) and at least one filter channel (24) the first throughflow opening (32) opening into the filter channel (24) and a second filter part (28) which is formed separately from the first filter (26), connected to the first filter part (26) and forming the between the filter parts (26, 28) extending and thereby delimited by the filter parts (26, 28) filter channel (24) is spaced from the first filter part (26).

Description

The invention relates to an energy store for a motor vehicle, in particular for a motor vehicle according to the preamble of patent claim 1.

Such energy stores for storing electrical energy or electrical current for motor vehicles, in particular for motor vehicles, are already sufficiently known from the general prior art and in particular from series vehicle construction. The respective energy store has a housing which has, forms or delimits a receiving space. The energy store also has at least one storage element for storing the electrical energy, the storage element being arranged in the receiving space. The storage element is, for example, a storage cell, in particular a battery cell such as a lithium-ion cell. Furthermore, it is conceivable that the storage element is a storage module, which can comprise a plurality of storage elements, in particular electrically connected to one another, such as storage cells, in particular battery cells, for example. In particular, the storage element can store the electrical energy electrochemically.

Furthermore, the DE 10 2017 104 644 A1 a housing arrangement with at least one electrical unit at risk of overheating, wherein the housing arrangement comprises at least one receiving device in which the electrical unit is received, and at least one cover device, and wherein the cover device covers the receiving device on at least one associated, open side and at least one first cover plate and comprises at least one second cover plate. The first cover plate is arranged parallel to the second cover plate. The first cover plate has first openings and the second cover plate has second openings. It is provided that the first cover plate and the second cover plate are spaced apart from one another, the first openings in the first cover plate being offset from the second openings in the second cover plate regardless of a thermal state of the electrical unit.

The object of the present invention is to further develop an energy store of the type mentioned at the beginning in such a way that particularly advantageous particle filtering can be implemented.

This object is achieved by an energy store with the features of claim 1. Advantageous configurations with expedient developments of the invention are specified in the remaining claims.

In order to further develop an energy store of the type specified in the preamble of claim 1, designed for example as a battery, in particular also as a high-voltage battery, in such a way that particularly advantageous particle filtering can be implemented, the invention provides that the energy store has at least one and preferably formed separately from the housing and thereby for example at least indirectly, in particular directly, held on the housing filter device which delimits at least one discharge channel and at least one filter channel. It is preferably provided that the filter device at least partially, in particular directly, delimits the discharge channel. Furthermore, it is conceivable that the filter device delimits the filter channel at least predominantly and thus more than half of it or else completely, in particular directly. The filter device has a first filter part formed, for example, as a filter plate or from a metal sheet, and a second filter part, which is formed, for example, from a filter plate or sheet metal. The filter parts are formed separately from one another and preferably, in particular directly, connected to one another and thus held one to the other. In particular, the discharge channel is at least partially, in particular directly, delimited by the first, inner filter part, which is therefore also referred to as the first channel or inner channel. The first filter part has at least one first throughflow opening which opens into the discharge channel at one end and into the filter channel at the other end. The second filter part is spaced apart from the first filter part to form the filter channel which runs between the filter parts and is thereby delimited by the filter parts, in particular in each case directly. In particular, the respective filter parts are respective solid bodies or walls or wall parts, for example a surface of the second filter part facing the first, inner filter part and a surface of the first filter part facing the second filter part each directly delimiting the filter channel so that the surfaces face one another. The second filter part is also referred to as the outer filter part or outer channel. In addition, the second filter part has at least one second through-flow opening which opens into the filter channel between the filter parts at one end and into the receiving space at the other end. The throughflow openings are arranged offset to one another and can be flowed through by a gas flowing out of the storage element and thus originating from the storage element, in particular in the event of a thermal event or in the event of thermal propagation. Thus, the second throughflow opening is from the storage element outflowing gas flowing into the receiving space and containing particles can flow through, so that the gas and in particular also the particles can be introduced into the filter channel via the second flow opening. By means of the filter channel, the gas can be guided to the first throughflow opening through which the gas can likewise flow and through which the gas can be introduced into the discharge channel. It can be seen that in the flow direction of the gas flowing from the second throughflow opening to the first throughflow opening and thereby flowing through the filter channel, the discharge channel is arranged downstream of the filter channel. On its way from the receiving space to the discharge channel, the gas flows first through the second through-flow opening, then through the filter channel and then through the first through-flow opening, so that the second through-flow opening is an inlet or inlet opening through which the gas flows from the receiving space into the Filter channel is drainable. The first through-flow opening is a discharge or outlet or discharge opening, via which the gas can be discharged from the filter channel and introduced into the discharge channel.

Since the throughflow openings are arranged offset to one another, for example the inlet opening (second throughflow opening) is at least partially, in particular at least predominantly or completely, overlapped by a wall area of the first, inner filter part. It is preferably also provided that the outlet opening (first throughflow opening) is at least partially, in particular at least predominantly or completely, overlapped by a wall area of the second, outer filter part. As a result, for example, at least some of the particles collide against at least one of the wall areas when the gas flows from the receiving space to and into the discharge channel, so that the particles initially contained in the gas can be at least partially filtered out of the gas by means of the filter device. Since the filter parts are spaced from one another and are designed as walls or have the wall areas, the filter device is a multi-walled filter device or the filter channel is a multi-walled filter channel or the filter device forms at least one multi-walled ventilation channel, which is also referred to as a venting channel, with the gas can be discharged from the receiving space in a defined manner via the ventilation channel and passed into the discharge channel and, for example, via this to the surroundings of the housing. Expressed again in other words, it is conceivable that the filter channel and the discharge channel form the ventilation channel described above, and are therefore components of the ventilation channel (venting channel). The multi-walled design of the ventilation channel enables particularly advantageous particle filtering to be implemented, within the framework of which the particles possibly contained in the gas can be filtered out of the gas particularly well.

The thermal event described above occurs, for example, in the event of a short circuit in the storage element. During or as a result of the thermal event, the storage element is particularly heated to a great extent, so that, for example, the gas mentioned is created from a liquid electrolyte of the storage element. In particular, as a result of such a thermal event on the storage element, thermal propagation, that is to say a thermal propagation process, can occur in the context of which, for example, the thermal event that initially occurs on the storage element spills over to at least one further storage element of the energy storage device When viewed alone, the storage element initially did not come to the or a thermal event and would not have come to a thermal event. As a result of such thermal propagation, a particularly large amount of gas can arise, in particular in the receiving space, this gas now advantageously being filtered by means of the filter device and being able to be discharged from the receiving space. The filter parts are preferably designed as metal sheets which are spaced apart from one another and are thus arranged at a distance from one another. This forms the multi-walled ventilation channel, via which the gas can advantageously be discharged from the receiving space. A position or point at which the ventilation duct is designed with multiple walls can, for example, be defined as desired along the ventilation duct.

The invention is based in particular on the knowledge that a filter element designed, for example, as a filter plate can be arranged directly on a rupture disk, whereby the gas can be discharged in a targeted and defined manner to the surroundings of the housing. Filtering is therefore usually only possible on or in the area of the bursting disc. In contrast to this, in the case of the invention, or the particle filtering is no longer limited to the position of the rupture disk. Clogging of the particle filter or the filter device, in particular with particles from the gas, can also be reduced compared to conventional solutions, since the particle filter can be distributed over a larger area compared to conventional solutions and is not limited to the opening cross-sectional area of the bursting disc . Through the multi-walled ventilation channel, through the number of walls or filter parts, through the spacing of the filter parts and through a corresponding design of the filter parts, a storage or battery-specific particle filtering can be set.

Further advantages, features and details of the invention emerge from the following description of preferred exemplary embodiments and on the basis of the drawing. The features and combinations of features mentioned above in the description as well as the features and combinations of features mentioned below in the description of the figures and / or shown alone in the figures can be used not only in the respectively specified combination, but also in other combinations or alone, without the scope of the Invention to leave.

• 1 ausschnittsweise eine schematische Perspektivansicht einer ersten Ausführungsform eines erfindungsgemäßen Energiespeichers;
• 2 ausschnittsweise eine schematische Schnittansicht des Energiespeichers gemäß der ersten Ausführungsform entlang einer in 1 gezeigten Schnittlinie A-A;
• 3 ausschnittsweise eine schematische Schnittansicht des Energiespeichers gemäß der ersten Ausführungsform entlang einer in 1 gezeigten Schnittlinie B-B;
• 4 ausschnittsweise eine schematische Schnittansicht des Energiespeichers gemäß der ersten Ausführungsform;
• 5 ausschnittsweise eine schematische Schnittansicht des Energiespeichers gemäß einer zweiten Ausführungsform;
• 6 ausschnittsweise eine schematische Schnittansicht des Energiespeichers gemäß einer dritten Ausführungsform;
• 7 ausschnittsweise eine schematische und geschnittene Perspektivansicht einer Filtereinrichtung des Energiespeichers gemäß einer ersten Ausführungsform;
• 8 ausschnittsweise eine weitere schematische und geschnittene Perspektivansicht der ersten Ausführungsform der Filtereinrichtung;
• 9 ausschnittsweise eine schematische Perspektivansicht einer zweiten Ausführungsform der Filtereinrichtung;
• 10 ausschnittsweise eine schematische Seitenansicht der Filtereinrichtung gemäß der zweiten Ausführungsform;
• 11 ausschnittsweise eine schematische Schnittansicht einer vierten Ausführungsform des Energiespeichers; und
• 12 ausschnittsweise eine schematische Seitenansicht des Energiespeichers gemäß der vierten Ausführungsform.

The drawing shows in:

• 1 a fragmentary schematic perspective view of a first embodiment of an energy store according to the invention;
• 2 a fragmentary schematic sectional view of the energy store according to the first embodiment along a FIG 1 section line AA shown;
• 3 a fragmentary schematic sectional view of the energy store according to the first embodiment along a FIG 1 shown section line BB;
• 4th a fragmentary schematic sectional view of the energy store according to the first embodiment;
• 5 a fragmentary schematic sectional view of the energy store according to a second embodiment;
• 6th a fragmentary schematic sectional view of the energy store according to a third embodiment;
• 7th a section of a schematic and sectioned perspective view of a filter device of the energy store according to a first embodiment;
• 8th a detail of a further schematic and sectioned perspective view of the first embodiment of the filter device;
• 9 a fragmentary schematic perspective view of a second embodiment of the filter device;
• 10 a fragmentary schematic side view of the filter device according to the second embodiment;
• 11 a fragmentary schematic sectional view of a fourth embodiment of the energy store; and
• 12th a section of a schematic side view of the energy store according to the fourth embodiment.

Identical or functionally identical elements are provided with the same reference symbols in the figures.

1 shows a section of a first embodiment of an energy store in a schematic sectional view 10 for storing electrical energy or electrical current for a motor vehicle, in particular for a motor vehicle. The energy storage 10 is also in 2 recognizable. In its fully manufactured state, the motor vehicle has the energy store 10 and at least one electrical machine by means of which the motor vehicle can be driven electrically, in particular purely. Thus, the motor vehicle is preferably a hybrid vehicle or an electric vehicle, in particular a battery electric vehicle (BEV).

In order to drive the motor vehicle electrically, in particular purely, by means of the electrical machine, the electrical machine is supplied with the electrical energy, that is to say with the electrical current, that is contained in the energy store 10 is stored. The energy storage 10 indicates a 2 partially recognizable housing also known as storage housing 12th which can comprise, for example, at least two housing parts that are formed separately from one another and connected to one another. A first of the housing parts is in 2 recognizable and there with 14th designated. For example, the housing part 14th a cover of the housing 12th . The case 12th forms or limits, in particular directly, a receiving space 16 of the energy storage 10 . The energy storage 10 has at least one in the receiving space 16 and thus in the housing 12th arranged storage element 18th on, by means of or in which the electrical energy, in particular electrochemically, is stored.

The energy store is preferably 10 a high-voltage component, in particular a high-voltage battery, the electrical voltage of which, in particular the electrical operating or nominal voltage, is preferably greater than 50 V (volts), in particular greater than 60 V. The electrical voltage of the energy store is preferably 10 several hundred volts, in order to be able to realize particularly high electrical powers for driving the motor vehicle, in particular purely electrically.

For example, in the event of a thermal event or as a result of a thermal event, the storage element can heat up considerably 18th come. As a result, an in particular liquid electrolyte of the storage element can be used 18th a gas arise, which from the storage element 18th flow out and first into the recording room 16 can flow in. In the gas can in particular hot or glowing particles can be added. The gas and the particles form a mixture, which is also referred to as the mass flow. In particular, the gas is also referred to as venting gas, as the housing 12th with regard to the gas to be vented. This means that the gas is out of the receiving room 16 is to be discharged in a targeted manner, for example to be able to avoid an excessive increase in pressure in the receiving space 15.

In order to be able to implement a particularly advantageous particle filtering, the energy store 10 at least one in the recording room 16 arranged and preferably separate from the housing 12th trained and at least indirectly, in particular directly, on the housing 12th held filter device 20th on that - how particularly good when viewed together with 5 is recognizable - at least one discharge channel 22nd and at least one filter channel 24 in particular each directly limited. To this end, the filter device 20th an inner one, separate from the housing 12th trained and, in particular directly, on the housing 12th , in particular on the housing part 14th , held and fastened, first filter part 26th and a second filter part 28 on, which is separate from the housing 12th and separate from the filter part 26th formed and at least indirectly, in particular directly, with the filter part 26th connected is. The in 1 and 2 The embodiment shown are connecting elements 30th provided by means of which the filter parts 26th and 28 are connected to each other. Here are the connecting elements 30th exemplarily designed as blind rivets. Also are the filter parts 26th and 28 for example designed as sheets or formed from sheets. This is the outer, second filter part 28 designed as an L-sheet, which has an L-shape in particular with regard to its cross-section and is thus in a corner region of the filter part 26th extends over a corner, thus surrounding the corner area, so that the filter part 28 on two different sides of the filter part facing away from each other 26th is arranged.

Out 3 it can be seen that the filter part 26th at least one end in the discharge channel 22nd and the other end in the filter channel 24 opening, first through-flow opening 32 having. The filter part 28 has at least one second throughflow opening 34 on which one end in the filter channel 24 and the other night in the recording room 16 flows out. As will be explained in more detail below, the throughflow openings are 32 and 34 of the gas from the storage element 18th permeable. For example, the through openings 32 and 34 thus designed as holes as bores.

It can be seen that at least one wall area W. of the filter part 26th from the housing part 14th , in particular from a second wall area W2 of the housing part 14th , is spaced so that the between the wall areas W. and W2 arranged discharge channel 22nd partly directly through the wall area W. and partly directly through the wall area W. facing wall area W2 is limited. Also is the filter part 28 at a distance from the filter part 26th arranged, in particular on one of the housing part 14th facing away and the recording room 16 facing side of the filter part 26th , such that the present directly with the first filter part 26th connected second filter part 28 forming the between the filter parts 26th and 28 running and thereby the filter parts 26th , 28 directly limiting filter channel 24 from the first filter part 26th is spaced. Thus, one limits the wall areas W. and W2 facing away and the outer filter part 28 facing wall area W3 of the first, inner filter part 26th and one in the recording room 16 facing away and the filter part 26th or the wall area W3 facing wall area W4 of the second, outer filter part 28 between the wall areas W3 and W4 running filter channel 24 each directly. That from the storage element 18th outflowing and thereby initially into the receiving space 16 Flowing gas, in particular with the particles contained therein, can pass through the second through-flow opening 34 flow through and thereby through the second through-flow opening 34 into the filter channel 24 flow into the filter channel 24 be initiated. By means of the filter channel 24 the gas becomes the first through-flow opening through which the gas can likewise flow 32 out, whereupon the gas also the flow opening 32 can flow through. This allows the gas out of the filter channel 24 flow out and into the drainage channel 22nd flow into the discharge channel 22nd be initiated. It can be seen that the discharge channel 22nd in the direction of flow of the through-flow openings 32 and 34 and the filter channel 24 flowing gas downstream of the filter channel 24 is arranged. Since the flow openings 32 and 34 are arranged offset to one another, in particular such that the throughflow opening 34 at least partially, in particular at least predominantly or completely, through the wall area W3 or through the filter part 26th is overlapped or covered, for example, at least some of the particles contained in the gas collide when the gas passes through the through-flow opening 34 flows through, against the wall area W3 or against the filter part 26th , whereby the particles contained in the gas by means of the filter device 20th be at least partially filtered out of the gas. In this way, particularly advantageous particle filtering can be implemented.

The flow opening 34 is also known as a through hole. In particular, it can Filter part 26th several flow openings 32 have and / or the filter part 28 can have several flow openings 34 exhibit. Using in 2 It can be seen that the mass flow through the through holes in the filter part, which is designed as an L-plate, for example 28 is passed through. Here, for example, the filter part 26th Used as a baffle element, in particular as a baffle plate, against which larger, glowing particles in the gas collide, whereby these larger, glowing particles can give off their energy and can fall down due to the force of gravity. The mass flow or at least the gas is increased by the distance between the filter part 28 (L-plate) and the first, inner filter part 26th , therefore through the filter channel 24 guided. Since the through holes (throughflow openings 32 and 34 ) are offset from one another, the particles that are larger than the distance between the filter parts 26th and 28 is filtered out of the gas. Via the through holes in the filter part 26th is at least the gas in the discharge channel 22nd guided, which, for example, together with the filter channel 24 forms a venting channel.

Out 4th it can be seen that the housing part 14th at least one rupture disc 36 may have which at least a portion of the discharge channel 22nd directly limited or at the the discharge channel 22nd ends. In other words, this is the discharge channel 22nd gas flowing through by means of the discharge channel 22nd to the rupture disc 36 respectively. The bursting disc 36 closes one in its undamaged state in the housing part 14th formed through opening. The bursting disc 36 is designed to burst in a targeted manner and thereby selectively to burst from the gas from the discharge channel 22nd Through opening of the housing part through which a flow can flow and also referred to as an outflow opening 14th to release so that over the through openings of the housing part 14th the gas from the discharge duct 22nd , especially to an environment 38 of the housing part 14th and in particular the housing 12th total, can be discharged. The bursting disc 36 bursts especially when a temperature of the gas in the discharge channel 22nd and / or one in the discharge channel 22nd prevailing and in particular caused by the gas pressure exceeds a threshold value. The mass flow or the gas is determined by a geometry of the ventilation channel or by the ventilation channel and, in particular, by the discharge channel 22nd to the rupture disc 36 guided, the housing part 14th may comprise several such rupture discs. If the respective bursting disc bursts, the mass flow or at least the gas from the energy store can 10 to its surroundings.

The aforementioned thermal event can be caused by a short circuit in the storage element 18th or in one of the storage elements 18th comprehensive module, in particular battery module, arise, with the thermal event, a high pressure development and as a result, the gas and the glowing particles can arise. The mass flow described should be filtered and released to the environment of the energy store 10 be guided. Outside the motor vehicle or outside the energy store 10 Mixing of the glowing particles, exhaust gases and ambient air should be avoided, which can now be prevented by removing the particles by means of the filter device 20th be filtered out of the gas. A first filter stage can through the defined passage openings 34 will be realized. A second filter stage can be achieved through the defined distance, also referred to as the wall distance, between the filter parts 26th and 28 will be realized. A third filter stage can be achieved through a defined labyrinth section between the respective flow opening 34 and the respective throughflow opening 32 , therefore through the filter channel 24 can be realized, by means of the labyrinth section or along the labyrinth section, that is to say by means of the filter channel 24 the gas and any particles still contained therein from the respective flow opening 34 into the respective flow opening 32 be directed. A fourth filter stage can pass through the respective first through-flow opening 32 in the first filter part 26th will be realized. A respective length and / or a respective geometry of the filter channel 24 and / or the discharge channel 22nd and / or the filter channel 24 and the drainage channel 22nd comprehensive ventilation channel and, if necessary, a geometry of the rupture disc 36 can define a position at which the gas is released to the environment 38 of the energy storage 10 or the housing 12th exit.

• - fertigungstechnisch sind alle hier exemplarisch dargestellten Filterstufen sehr einfach und kostengünstig herstellbar,
• - eine Variation der einzelnen Filterstufen ermöglicht es, schnell und effizient auf neue Anforderungen und Erkenntnisse im Hinblick auf ein thermisches Ereignis und/oder eine thermische Propagation zu reagieren
• - die Größe der zu filternden Partikel lässt sich einfach über die Filterstufen einstellen

As the filter parts 26th and 28 are spaced from each other and respective walls or walls of the filter device 20th or the ventilation channel represent, the ventilation channel is a multi-walled ventilation channel, by means of which the particles can be at least partially filtered out of the gas. In particular, the following advantages can be realized as a result:

• - In terms of production technology, all of the filter stages shown here as an example can be produced very easily and inexpensively,
• - A variation of the individual filter stages makes it possible to react quickly and efficiently to new requirements and findings with regard to a thermal event and / or thermal propagation
• - The size of the particles to be filtered can be easily adjusted using the filter levels

As in 5 is shown by way of example, the throughflow opening can, for example 32 through a hole or, in the present case, through an exposed flap of the filter part 26th be realized. Alternatively or additionally, the throughflow opening 34 through a hole, in particular a hole, or through a flared tab 42 of the filter part 28 be realized. In particular, the filter part 28 to adjust the distance between the filter parts 26th and 28 and used to define an exhaust gas and particle entry point and to define a labyrinth function. In particular, the respective through hole (throughflow opening 32 respectively 34 ) be designed as a hole, as a or through an issued tab, as a slot, etc. A fixation of the filter device 20th especially on the housing 12th and especially on the housing part 14th can be realized by a screw solution and / or clamp solution and / or welding solution. The in 5 A screw solution is provided in the frame by means of at least one screw element 44 against the housing 12th and in particular against the housing part 14th is screwed. It can be seen that the filter parts 26th and 28 are designed as multi-walled channel elements or form or limit the multi-walled ventilation channel. Connection points between the filter parts 26th and 28 can be designed as screw / clamping / riveting and / or welding solutions. In other words, it is conceivable that the filter parts 26th and 28 screwed to one another and / or clamped to one another and / or riveted to one another and / or welded to one another and / or connected to one another in some other way.

The distance between the filter parts 26th and 28 can be set or brought about by means of at least one spacer element. The spacer element can be integral with one of the filter parts 26th and 28 be trained. The spacer element, also referred to as a spacer element, can be in particular an embossed knob and / or in particular an embossed bead, in particular one of the filter parts 26th and 28 , or the spacer element can be designed as some other spacer element. It is also conceivable that the spacer element is separate from the two filter parts 26th and 28 formed and between the filter parts 26th and 28 arranged and in particular on the respective filter part 26th respectively 28 , in particular directly, is supported. The distance between the filter parts 26th and 28 is, for example, 0.8 mm.

The in 6th The embodiment shown are the filter parts 26th and 28 at the respective connection points V connected to one another, in particular welded to one another, in particular by spot welding and / or seam welding. The filter channel 24 is a space between the filter parts 26th and 28 , wherein the distance or the interspace can be formed or adjusted by at least one or more knobs, in particular embossed knobs. Thus, for example, the aforementioned spacer element is produced as a nub, which is made, for example, by embossing one of the filter parts 26th and 28 formed and thus in one piece with the one filter part 26th respectively 28 can be formed.

7th and 8th illustrate a first embodiment of the filter device 20th . At the respective connection point V can the filter parts 26th and 28 for example have respective passage openings by means of which the filter parts 26th and 28 for example can be connected to each other. In 7th and 8th is the second, outer filter part 28 shown transparently. The aforementioned spacer element, by means of which the filter parts 26th and 28 are arranged or held at a distance from one another is in 8th shown by way of example and denoted there by 46. Here is the spacer element 46 for example as a bead of the filter part 26th formed and thus in one piece with the filter part 26th educated. Here is the spacer element 46 , especially directly, on the filter part 28 supported.

9 and 10 show a second embodiment of the filter device 20th , where in the 9 and 10 the second, outer filter part 28 is shown transparently. It can be seen that the throughflow openings 32 and 34 are arranged offset from one another in such a way that a first part of the throughflow opening 32 and a second part of the flow opening 34 overlap each other. A third part of the flow opening 32 is through the filter part 28 or through its wall area W4 overlaps, and a fourth part of the flow opening 34 is through the filter part 26th or overlapped by its third wall area.

Out 11 it can be seen that, for example, at an especially upper connection point V1 the filter part 26th , in particular on one side and / or on its edge, is welded, in particular spot-welded, in particular before a cathodic dip painting, whereby the filter part 26th with the case 12th , especially with the housing part 14th , connected is. At a particularly lower connection point V2 is a tab 48 provided, in particular on the housing part 14th is held, in particular by welding and especially by spot welding. Here is the filter part, for example 28 into the flap 48 plugged in. In particular, the tab 48 before the cathodic dip painting (KTL) with the housing part 14th welded. The filter parts 26th and 28 are at at least one connection point V3 , in particular by means of a connecting element 50 , connected to one another, the connecting element 50 for example, a rivet, in particular a blind rivet, can be.

Out 12th it can be seen that the flow openings 32 a first hole pattern and the flow opening 34 form a second hole pattern, the hole patterns being offset from one another, and therefore being arranged offset from one another. As a result of this offset of the hole patterns with respect to one another, a filter function and thus the previously described particle filtering can be set as required.

List of reference symbols

10

Energy storage

12th

casing

14th

Housing part

16

Recording room

18th

Spoke element

20th

Filter device

22nd

Drainage channel

24

Filter channel

26th

first filter part

28

second filter part

30th

Connecting element

32

Flow opening

34

Flow opening

36

Rupture disc

38

Surroundings

40

Tab

42

Tab

44

Screw element

46

Spacer element

48

Tab

50

Connecting element

V.

Junction

V1

Junction

V2

Junction

V3

Junction

W.

Wall area

W2

Wall area

W3

Wall area

W4

Wall area

QUOTES INCLUDED IN THE DESCRIPTION

This list of the documents listed by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent literature cited

• DE 102017104644 A1 [0003]

Claims (6)

Energy storage device (10) for storing electrical energy for a motor vehicle, with a housing (12) delimiting a receiving space (16), in the receiving space (16) of which at least one storage element (18) for storing electrical energy is arranged, characterized by at least one Filter device (20) arranged in the receiving space (16) and delimiting at least one discharge channel (22) and at least one filter channel (24), which at least one end of a first filter part (26) into the discharge channel (22) and the other end into the filter channel ( 24) opening, first throughflow opening (32) and a second filter part (28) which is formed separately from the first filter (26), connected to the first filter part (26) and forming the one between the filter parts (26, 28) and thereby by the filter parts (26, 28) delimited filter channel (24) is spaced from the first filter part (26) and at least one end into the filter channel (24) u nd at the other end opening into the receiving space (16), arranged offset to the first throughflow opening (32) and through which a gas flowing out of the storage element (18) flows into the receiving space (16) and contains particles, has a second throughflow opening (34), Via which the gas can be introduced into the filter channel (24), by means of which the gas can be guided to the first throughflow opening (32) through which the gas can flow, via which the gas into the discharge channel arranged downstream of the filter channel (24) in the flow direction of the gas (22) can be introduced, whereby the particles contained in the gas can be at least partially filtered out of the gas by means of the filter device (20). Energy storage (10) according to Claim 1 , characterized in that the discharge channel (22) is limited partially by the first filter part (26) and partially by a wall (W) of the housing (12), in particular a cover (14) of the housing (12). Energy storage (10) according to Claim 2 , characterized in that the first filter part (26) is formed separately from the housing (12) and is held on the housing (12). Energy store (10) according to one of the preceding claims, characterized in that the housing (12) has at least one bursting disc (36) which directly delimits at least a portion of the discharge channel (22) and is designed to burst in a targeted manner and thereby selectively one of to release the outflow opening through which the gas can flow from the discharge channel (22), via which the gas can be discharged from the discharge channel (22), in particular to the surroundings (38) of the housing (12). Energy store (10) according to one of the preceding claims, characterized by at least one spacer element (46), by means of which the filter parts (26, 28) are held at a distance from one another while forming the filter channel (24). Energy storage (10) according to Claim 5 , characterized in that the spacer element (46) is formed in one piece with one of the filter parts (26, 28) and separately from the other filter part (28, 26) or that the spacer element (46) is formed separately from both filter parts (26, 28) and is arranged between the filter parts (26, 28).

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