Arrangement with a sealing element for insertion into a battery module holder of an electrical energy storage device and method for producing an arrangement

Abstract

The invention relates to a sealing element (16) for insertion into a battery module holder (12) of an electrical energy storage device of an at least partially electrically operated motor vehicle, wherein the sealing element (16) is designed to be arranged on a holder plate (28) of the battery module holder (12), wherein the holder plate (28) is coupled on an upper side (28) to a battery housing upper part (14) and on an underside to a battery module (22), wherein the sealing element (16) has a radial first sealing ring (30) for sealing the sealing element (16) with respect to the holder plate (28), and the sealing element (16) has an axial second sealing ring (32) for sealing the sealing element (16) with respect to the battery module (22), and wherein at least one connecting element is passed through an inner region (34) of the sealing element (16) from the battery housing upper part (14) to the battery module (22).Furthermore, the invention relates to an arrangement (10) and a method for producing an arrangement (10).

Description

The invention relates to an arrangement having a sealing element for insertion into a battery module holder of an electrical energy store of an at least partially electrically operated motor vehicle according to the preamble of patent claim 1.Seals between two battery housing parts at an interface for power and coolant lines are already known from the prior art. The battery housing is here substantially formed from rectangular extruded profiles (SPP) which are arranged and welded to one another transversely to the direction of travel. The extruded profiles form the battery housing lower part.For example, two cell modules, one from the left and the other from the right, are inserted into each extruded profile to the middle. The cell modules contain the individual battery cells, their interconnection, and the cooling and sensor system. The interfaces for high-voltage, control and cooling are located on the end face on the upper side. The cell modules are inserted into the extruded profile in such a way that the interfaces are in each case in the middle. The cell modules form a closed system.The electrical connection and cooling of the battery is located on the upper housing part and is covered by a housing cover. This forms the upper housing part itself. The cell modules are contacted by openings in the middle of the extruded profiles. The extruded profiles are laterally closed by so-called L-profiles.In particular, the cell modules must be aligned as exactly as possible in the extruded profiles so that they can be reliably contacted. A seal between the upper and lower parts of the housing and a tolerance compensation of the interfaces of the extruded profiles and cell block must be carried out in this case. In the case of a thermal event of one or more battery cells, these exhaust. In this case, hot vent gases can escape up to 1200 degrees Celsius and escape upwards from the cell module into the region between the cell module and the extruded profile. From there, it is intended to flow via a channel in the L-profiles to the rupture disks and then into the environment. However, the vent gas should not pass through the openings in the extruded profile, through which the cell modules are contacted, into the upper housing part.U.S. Pat. No. 11 431 058 B2 describes an inlet duct for a vehicle battery system comprising an inlet part having an inlet opening which is open toward the vehicle interior, outlet parts which are separated from the inlet part and have outlet openings for supplying air introduced into the inlet opening to the battery system via two separate paths, and a grid which is provided in the inlet part and has a plurality of ribs which form a grid in order to cover the inlet opening.DE 10 2020 126 962 A1 relates to an arrangement for plug-connecting electrical connections by a housing, in particular a device for driving a compressor. The arrangement has at least one plug connection with at least one plug connector for transmitting electrical energy and a receiving element for receiving the at least one plug connector. The receiving element can be fixed to the housing. The receiving element has an opening on an inner side oriented facing into a volume enclosed by the housing for receiving a fastening element for fixing the receiving element to the housing. The opening is formed starting from the inner side, extending into the receiving element, and ending in the receiving element. The fastening element is arranged inserted into the opening from the volume enclosed by the housing through a through opening formed in the housing.DE 10 2020 104 939 A1 describes exemplary barrier seal assemblies for sealing electrical enclosures of a vehicle. The electrical enclosures of a vehicle may include any electrical enclosure used in a vehicle, such as battery pack enclosures and electrical connector assemblies, among others. An example barrier seal assembly may include a primary seal, a barrier seal, and a carrier extending between the primary seal and the barrier seal. The barrier seal assembly is configured to reduce corrosion inducing agent penetration into an interior of electrical enclosures of a vehicle.It is an object of the present invention to provide an arrangement and a method for producing an arrangement, by means of which improved operation of an electrical energy store can be realized.This object is achieved by an arrangement and by a method for producing an arrangement according to the independent patent claims. Advantageous embodiments are specified in the dependent claims.One aspect of the invention relates to an arrangement for an electrical energy store of an at least partially electrically operated motor vehicle, having at least one battery module holder, a battery housing upper part and a sealing element for insertion into a battery module holder of an electrical energy store of an at least partially electrically operated motor vehicle, wherein the sealing element is designed for arranging a holder plate of the battery module holder, wherein the holder plate is coupled at an upper side to a battery housing upper part and is coupled at an underside to a battery module.It is provided here that the sealing element has a radial first sealing ring for sealing the sealing element with respect to the mounting plate, and the sealing element has an axial second sealing ring for sealing the sealing element with respect to the battery module, and wherein at least one connecting element is passed from the battery housing upper part to the battery module in an inner region of the sealing element.In particular, the invention thus proposes that the openings between the corresponding housing planes, in particular separated by the mounting plate, be sealed with the sealing element, which is inserted from above, for example, into the openings of the battery module mounting, which is in particular configured as an extruded profile, onto the battery cell modules. The sealing element has an axial seal to the upper side of the battery cell modules and a radial seal to the extruded profile in order to realize here a tolerance compensation between the extruded profile and the battery cell block.The sealing region extends annularly around the interfaces on the battery cell module, in particular for the connecting elements. This has the particular advantage that sealing between vent regions on the one hand and the electric system and cooling on the other hand can be realized despite different mounting directions of cell modules and their contacting. Furthermore, tolerance compensation can be realized between the battery cell block and the extruded profile. Likewise, a stop for the alignment of the cell modules within the extruded profile can also be provided, and thus no corresponding stop device is necessary.Furthermore, the sealing element has at least two current sleeves for passing through two high-voltage lines as connecting element. In other words, at least two high-voltage lines are led in particular from the battery housing upper part to the battery module. These are now guided to the battery module in particular via the current sleeves within the sealing element. In particular, the high-voltage contacting of the cell modules is thus integrated directly into the sealing insert, and the latter is connected to the cell module, for example, via the corresponding busbar screw connections, and the axial seal is pressed onto the cell module cover.Furthermore, it is provided that the sealing element has at least two cooling openings for passing through two cooling lines as a connecting element. In particular, coolant lines are also inserted through the annular opening in the sealing element between the high-voltage contacts, for example. The coolant lines can be fastened to the sealing insert. Reliable cooling of the battery modules can thus also be realized.It has furthermore proven advantageous if the two power sleeves are formed in addition to fixing the battery module to a busbar. For example, the busbar can be formed on an upper side of the power sleeve and, in turn, contact can be made with cell poles of the battery module on an underside of the power sleeve. The current sleeve can in turn have a thread. A screw can then be screwed from the busbar via the current sleeve into the pole accordingly. Thus, reliable contacting of the high-voltage lines or the current sleeves and the busbar with the corresponding poles can be realized.It is likewise advantageous if the sealing element has a carrier plate on which at least the first sealing ring and the second sealing ring are arranged. A supporting structure for the sealing element can thus be created, as a result of which a reliable seal between the battery module holder and the battery module itself can be realized.It is likewise advantageous if the carrier plate is formed from an electrically insulating material. Thus, for example, corresponding electrical sparkovers can be prevented.A further advantageous embodiment provides that the sealing element has a control line opening for the passage of at least one control line as a connecting element. In particular, this line can also be designed as a low-voltage line. This can also be inserted through an annular opening in the sealing insert between the high-voltage openings. Thus, a control of the cell modules can also be reliably secured.According to an advantageous embodiment of the arrangement, a sealing element holder is formed on the holder plate, which is formed for receiving the sealing element and / or has positioning elements and / or the holder plate has positioning elements, which are formed for positioning the battery element relative to the holder plate. In particular, if, for example, the mounting plate is designed to be correspondingly thin, the sealing element mounting can be designed to produce a corresponding reliable contacting between the mounting plate and the sealing element. Furthermore, the positioning elements can be designed to form corresponding stop elements when the battery modules are pushed in laterally, so that reliable positioning of the battery modules within the battery module holder can be realized.Yet another aspect of the invention relates to a method for producing an arrangement according to the preceding aspect, comprising the steps of providing the battery module holder, inserting at least one battery module into a receptacle of the battery module holder, arranging the sealing element on a holder plate of the battery module holder and arranging the battery housing upper part on the holder plateIn particular, the corresponding stops can therefore also be integrated, for example, in the corresponding sealing frame, which can also be referred to as a sealing element holder, which align the battery modules in the extruded profile, that is to say the battery module holder, both in the longitudinal direction and in the transverse direction, so that the corresponding interfaces of the battery modules are aligned as exactly as possible with the sealing frame and the sealing inserts can be reliably installed.Advantageous embodiments of the sealing element are to be regarded as advantageous embodiments of the arrangement and of the method.Further advantages, features and details of the invention are evident from the following description of preferred exemplary embodiments and on the basis of the drawings. The features and combinations of features mentioned above in the description and 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 departing from the scope of the invention.The following are shown: FIG. 1 is a schematic perspective view of an embodiment of an arrangement; FIG. 2 is a schematic perspective view of an embodiment of a sealing element; FIG. 3 shows a schematic sectional view of an embodiment of an arrangement; FIG. 4 is a schematic perspective view of an embodiment of an arrangement; FIG. 5 shows a schematic sectional view of an embodiment of an arrangement; and FIG. 6 shows a further schematic sectional view of an embodiment of an arrangement.In the figures, identical or functionally identical elements are provided with the same reference numerals.FIG. 1 shows a schematic perspective view of an embodiment of an arrangement 10. the arrangement 10 is designed for an electrical energy store, not shown, of an at least partially electrically operated motor vehicle, not shown. For example, the electrical energy store can have further arrangements 10.The arrangement 10 has at least one battery module holder 12, a battery housing upper part 14 and a sealing element 16 (FIG. 2 ). In the present exemplary embodiment, the battery housing upper part 14 is in particular already arranged on the battery module holder 12. The battery module holder 12 essentially has a plurality of extruded profiles 18. Furthermore, a corresponding interior space between the extruded profiles 18 can be closed off by means of so-called L profiles 20.In particular in the intermediate spaces, i.e. the described interior spaces, between the extruded profiles 18, corresponding battery modules 22 (FIG. 3 ) are arranged. The battery modules 22 are arranged in particular laterally. In particular, at least two battery modules 22 are arranged within the extruded profiles. For example, a respective battery module 22 can be arranged on a left and a right side of the arrangement 10. In particular, the battery housing upper part 14 is arranged centrally in the present case. In the interior of the battery housing upper part 14, for example, a cooling device 24 and an electric system or an electronic system 26 can be arranged.FIG. 2 shows a schematic perspective view of an embodiment of a sealing element 16. The sealing element 16 is in turn configured for arrangement on a mounting plate 28 of the battery module mounting 12. The support plate 28 is coupled at an upper side to the battery housing upper part 14 and at an underside to a battery module 22.For this purpose, the sealing element 16 has a radially first sealing ring 30 for sealing the sealing element 16 with respect to the mounting plate 28, and the sealing element 16 also has an axial second sealing ring 32 for sealing the sealing element 16 with respect to the battery module 22, and wherein at least one connecting element is passed through from the battery housing upper part 14 to the battery module 22 in an inner region 34 of the sealing element 16.In particular, FIG. 2 thus shows the sealing element 16, which furthermore has at least two current sleeves 36 for passing through two high-voltage lines 38. The two power sleeves 36 can be formed in addition to fixing the battery module 22 to a busbar 40 (FIG. 6 ).Furthermore, FIG. 2 shows that the sealing element 16 has at least two cooling openings 42 for passing through two cooling lines 44 (FIG. 6 ) as connecting element. Fermier shows in particular that the sealing element 16 has a control line opening 46 for passing through at least one control line 48 (FIG. 6 ).Furthermore, it is shown in particular that the sealing element 16 has a carrier plate 50, on which at least the first sealing ring 36 and the second sealing ring 32 are arranged. The carrier plate 50 is formed in particular from an electrically insulating material.FIG. 3 shows a schematic perspective view of an embodiment of an arrangement 10. Furthermore, FIG. 3 shows that the mounting plate 52 can have positioning elements 54 which are designed for positioning the battery module 22 relative to the mounting plate 22, 28.FIG. 4 shows a schematic perspective view of an embodiment of an arrangement 10. Each sealing element 16 is in this case assigned in particular to an underlying battery module 22, not shown.FIG. 5 shows a further schematic sectional view of an embodiment of the arrangement 10.FIG. 6 shows a schematic sectional view of an embodiment of an arrangement 10. The current sleeves 36 contact cell poles 56 of the battery module 22 in this case. a busbar 40 is screwed to the pole 56 via a corresponding current-conducting screw 58 and via the current sleeves 26.List of reference characters10 Arrangement 12 Battery module holder 14 Battery housing upper part 16 Sealing element 18 Extruded profile 20 L profile 22 Battery module 24 Cooling device 26 Electrical / electronics 28 Holder plate 30 First sealing ring 32 Second sealing ring 34 Inner region 36 Power sleeve 38 High-voltage line 40 Busbar 42 Cooling opening 44 Cooling line 46 Control line opening 48 Control line 50 Carrier plate 52 Sealing element holder 54 Positioning element 56 Cell pole 58 Screw

Claims

Arrangement (10) for an electrical energy store of an at least partially electrically operated motor vehicle, having at least one battery module holder (12), a battery housing upper part (14) and a sealing element (16), wherein the sealing element (16) is designed for arrangement on a holder plate (28) of the battery module holder (12), wherein the holder plate (28) is coupled at an upper side (28) to the battery housing upper part (14) and is coupled at an lower side to a battery module (22), wherein the sealing element (16) has a radial first sealing ring (30) for sealing the sealing element (16) with respect to the holder plate (28), and the sealing element (16) has an axial second sealing ring (32) for sealing the sealing element (16) with respect to the battery module (22), and wherein at least one connecting element is led through from the battery housing upper part (14) to the battery module (22) in an inner region (34) of the sealing element (16), wherein the sealing element (16) has at least two current sleeves (36) for passing through two high-voltage lines (38) as connecting element, characterized in that the sealing element (16) has at least two cooling openings (42) for passing through two cooling lines (44) as connecting element.Arrangement (10) according to Claim 1, characterized in that the two current sleeves (36) are additionally designed for fixing the battery module (22) to a busbar (40).Arrangement (10) according to one of the preceding claims, characterized in that the sealing element (16) has a carrier plate (50), on which at least the first sealing ring (30) and the second sealing ring (32) are arranged.Arrangement (10) according to Claim 3, characterized in that the carrier plate (50) is formed from an electrically insulating material.Arrangement (10) according to one of the preceding claims, characterized in that the sealing element (16) has a control line opening (46) for passing through at least one control line (48) as connecting element.Arrangement (10) according to one of the preceding claims, characterized in that a sealing element holder (52) is formed on the holder plate (28), which is formed for receiving the sealing element (16), and / or the sealing element holder (52) has positioning elements (54), which are formed for positioning the battery module (22) relative to the holder plate (28).Method for producing an arrangement (10) according to one of Claims 1 to 6, having steps: - providing the battery module holder (12); - inserting a battery module (22) into a receptacle of the battery module holder (12); - arranging the sealing element (16) on a holder plate (28) of the battery module holder (12); and - arranging the battery housing upper part (14) on the holder plate (28).

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