Housing of a traction battery of an electrically driven vehicle, housing upper shell for such a housing, traction battery with such a housing, electrically driven vehicle with such a traction battery and method for assembling a housing of a traction battery of an electrically driven vehicle

Abstract

Housing (100; 140; 180) of a traction battery (200; 240; 280) of an electrically driven vehicle, comprising • a housing base (101) designed in particular like a tub, ◯ which is designed to receive at least one battery module (201) of the traction battery (200; 240; 280) and ◯ in which a traction battery connection unit (204) is arranged, • a housing upper shell (102; 142; 182) which is designed in particular like a hood and has at least ◯ a traction plug (216) and a traction cable harness (211) for connecting the traction plug (216) to traction connections (206, 207) of the traction battery connection unit (204), ◯ optionally an on-board power supply plug (221) and an on-board power supply cable harness (219) for connecting the on-board power supply plug (221) to on-board power supply connections (208) of the traction battery connection unit (204), ◯ optionally a charging plug (241) and a charging cable harness (242) for connecting the charging plug (241) to charging connections (206a, 207a) of the traction battery connection unit (204), ◯ for the charging plug (241) optionally a switching device (281) for connecting or disconnecting the charging plug (241) and the charging cable harness (242), ◯ to the switching device (281) optionally a measuring line strand (285) at least for transmitting a measured value of a charging voltage at the charging plug (241), • a mounting interface (222) in which all electrical connections between the terminals of the traction battery connection unit (204) and the housing upper shell (102; 142; 182) are made, the mounting interface (222) comprising: • a first adapter part (225) connected to the traction battery connection unit (204) and / or guided in the traction battery connection unit (204), in which the traction connections (206, 207), the charging connections (206a, 207a) and optionally the vehicle electrical system connections (208) and / or the measuring connections (209) are contained and / or guided, and • a second adapter part (226) which is connected to the housing upper shell (102; 142; 182) and / or guided in the housing upper shell (102; 142; 182), in which connection elements (214, 215; 220; 223) of the traction cable harness (211), the charging cable harness (242) and optionally of the on-board network cable harness (219) and / or the measuring cable harness (285) are contained and / or guided, wherein the first and the second adapter part (225, 226) are brought together in a form-fitting manner in an assembly direction and engage one another, in which the housing upper shell (102; 142; 182) and the housing lower shell (101) are also brought together to form the housing (100; 140; 180).

Description

The invention relates to a housing of a traction battery of an electrically drivable vehicle. The invention further relates to a housing lower shell and a housing upper shell for such a housing, and to a traction battery having such a housing and to an electrically drivable vehicle having such a traction battery. The invention also relates to a method for mounting a housing of a traction battery of an electrically drivable vehicle.DE 10 2013 009 713 A1 discloses a cable duct which is designed such that it is suitable and usable for voltages and currents occurring in hybrid and electric vehicles and, in addition, can be produced economically with low weight. The publication also shows a battery pack, in particular for hybrid and electric vehicles, having such a cable duct. This cable duct has a material density of between 10 and 500 kilograms per cubic meter, at least two separate cable guides, designed to accommodate at least one electrical line each, and retaining elements, designed to fix the electrical lines in the respective cable guide, wherein at least one of the electrical lines is designed for a voltage of more than 60 V and wherein at least one of the electrical lines is designed for a current intensity of more than 10 A. Furthermore, the cable duct has a width of 3 cm to 100 cm, a length of 25 cm to 500 cm, a height of 2 cm to 50 cm and a weight of 30 g to 3000 g.The prior DE 10 2015 201 881 A1 describes an electrical connecting device for a housing element of a housing of an internal electrical device arranged in the housing, in particular of a traction battery, preferably for an electrically operable, preferably drivable vehicle. The connecting device comprises at least one external electrical connecting element arranged on the housing element for connecting at least one feed line of the internal electrical device to at least one external electrical device arranged outside the housing. For this purpose, at least one line string electrically connected on one side to the at least one external electrical connecting element and at least one connection element connected on the other side to the at least one line string are provided for connecting the at least one supply line of the internal electrical device thereto. In this case, the at least one external electrical connecting element, the at least one line section and the at least one connection element are arranged fixedly on the housing element. The at least one connection element is arranged on an inner side of the housing element in the region of at least one mounting opening in the housing element such that it can be accessed from an outer side of the housing.The prior DE 10 2015 201 881 A1 also mentions a housing with such a housing element, an internal electrical device, in particular a traction battery, preferably for an electrically operable, preferably drivable, vehicle, with such a housing, and an electrically operable, preferably drivable, vehicle with such an internal electrical device.The earlier DE 10 2015 201 881 A1 shows in particular a housing for a traction battery, formed from a housing element which is shaped like a hood, a housing lower shell which is designed like a trough and a supporting frame. The electrical connecting device comprises, as a first external electrical connecting element arranged on the housing element, a charging plug for connecting to a first external electrical device designed as a battery charging device. Furthermore, the electrical connecting device comprises, as a second external electrical connecting element likewise arranged on the housing element, a traction plug for connecting to a second external electrical device designed as a traction device. Charging plug and traction plug are designed as high-voltage plugs. The electrical connecting device also comprises, as a third external electrical connecting element arranged on the housing element, an on-board power supply connector for connecting to a third external electrical device forming an on-board power supply of the vehicle.The earlier DE 10 2015 201 881 A1 furthermore shows that an installation opening is provided in the wall of the housing element. Behind the mounting opening in the spatial region enclosed by the housing element, a number of connection elements are arranged, which can be accessed from an outer side of the housing through the mounting opening. Connecting elements provided for connecting the charging plug and the traction plug are combined to form a common component with electrically conductive contact elements to form the charging plug and the traction plug and also with a common touch-protected connection housing. A further connection element is provided for connecting the vehicle electrical system plug. The connection elements are designed for connecting a feed line in a traction battery connection housing, abbreviated to BJB, thereto. The BJT also includes, among other things, switching devices, particularly contactors, for switching the traction battery on and off.The production of traction batteries of the type shown in the prior DE 10 2015 201 881 A1, in particular for electrically operable, preferably drivable, vehicles, is subject to a high cost pressure. Therefore, the most efficient production possible in large production is sought. A prerequisite for this is simple and reliable working steps which can be automated as far as possible, and also easy, reliable testability in order to ensure the highest possible production quality. In traction batteries, a major complication factor is that battery modules or battery cells are installed therein which are already under an electrical voltage during the production of the traction batteries, which voltage typically accumulates to several hundred volts by connecting all battery modules or battery cells of a traction battery together before the housing is closed. This constitutes a considerable source of danger during manufacture, in particular also during the assembly of the housing.US 2013 / 0 037 336 A1 discloses a battery system for use in a vehicle. The battery system includes a tray having a plurality of battery containers. A plurality of batteries are also provided, each battery of the plurality of batteries being received in a battery receptacle. A conductive layer in electrical communication with the plurality of batteries and a terminal for electrically coupling to a vehicle are also provided in the battery system. A cover is locked to the receptacle. The lid includes a computer and an identification system for the plurality of batteries. A housing for a battery system and a vehicle including a battery system are also disclosed.DE 10 2013 220 119 A1 describes a battery housing which has a basic housing which is configured to accommodate at least one battery cell, a housing cover which is configured to be connected to the basic housing, and battery electronics, wherein the battery electronics are mounted on an inner side of the housing cover. Further, a battery and a method for assembling a battery will be described.The invention accordingly has the object of further simplifying and more reliably and economically configuring the production of a traction battery of the type described above, in particular the production or mounting of a housing for such a traction battery having a housing element of a hood-like shape and a lower housing shell of a trough-like shape, in particular configuring the housing in such a way that simplifications and cost savings are achieved and the operating reliability is increased.According to the invention, this object is achieved by a housing of a traction battery of an electrically drivable vehicle, comprising• a housing lower shell, which is in particular configured in the manner of a trough,◯ configured to receive at least one battery module of the traction battery, and◯ in which a traction battery connection unit is arranged,• an upper housing shell, which is in particular shaped like a hood, at least with a traction plug and a traction line section for connecting the traction plug to traction connections of the traction battery connection unit, optionally an on-board power supply connector and an on-board power supply line for connecting the on-board power supply connector to on-board power supply connections of the traction battery connection unit, optionally a charging plug and a charging line string for connecting the charging plug to charging connections of the traction battery connection unit, to the charging plug optionally a switching device for connecting or disconnecting the charging plug and charging line string,◯ to the switching device optionally a measuring line string at least for transmitting a measured value of a charging voltage at the charging plug,• An assembly interface in which all electrical connections are established between the terminals of the traction battery terminal unit and the upper housing shell.Preferably, the housing lower shell, which is in particular configured in the manner of a trough, and the housing upper shell, which is in particular configured in the manner of a hood, form a housing which is tight all around, in particular hermetically sealed, when in the assembled, i.e. assembled, connected to one another; this is preferably configured in a gas- and / or liquid-tight manner in order to protect the traction battery from environmental influences in the best possible manner during operation of the vehicle. The lower housing shell in the intended installation position in the vehicle is facing its underside, and the upper housing shell faces its upper side. Arranged in the housing lower shell are at least one or more battery modules-referred to below in simplified form as the battery modules-and the traction battery connection unit, which is also referred to as "battery junction box", abbreviated to BJB, and in which all connections of the battery modules are joined together for connecting the battery modules to at least one external electrical device arranged outside the housing, which can comprise, for example, a traction motor, i.e. an electric machine, a battery charging device and / or electrical control devices of the vehicle. The traction battery connection unit may likewise contain control devices, in particular for the operation of the traction battery.According to the invention, the battery modules are connected to the external electrical device arranged outside the housing via the traction battery connection unit, in particular exclusively via the latter. For this purpose, the traction battery connection unit has traction connections and optionally additionally vehicle electrical system connections and optionally additionally charging connections, wherein the charging connections can correspond to the traction connections in one embodiment. In principle, both traction connections and also on-board power supply connections and charging connections are preferably provided, regardless of whether or not they are actually connected to an external electrical device in different embodiments of the traction battery. This achieves a standardization of the traction battery connection unit and thus of the assembly comprising the housing lower shell, the battery modules and the traction battery connection unit, and thus a simplification and cost reduction during production and storage.According to the invention, the housing upper shell, which is designed in particular like a hood, is furthermore equipped with the traction plug and the traction line string for connecting the traction plug to the traction connections of the traction battery connection unit for connecting in particular the traction motor to the traction plug and thus to the traction battery. This equipment of the upper housing shell forms a type of basic equipment on which different variants of the configuration of the upper housing shell are provided in terms of the optional equipment with further elements.In a first variant, the upper housing shell is furthermore designed with an on-board power supply connector and an on-board power supply line for connecting the on-board power supply connector to the on-board power supply connections of the traction battery connection unit, wherein an on-board power supply of the vehicle, which is comprised by the external electrical device arranged outside the housing, can be connected to the on-board power supply connector.In a further variant, the upper housing shell is furthermore formed with a charging plug and a charging line string for connecting the charging plug to the charging connections of the traction battery connection unit, wherein a battery charging device comprised by the external electrical device arranged outside the housing or forming such is connectable to the charging plug. In a modification, the charging connections may match the traction connections and the charging line may match the traction line, i.e. the traction plug also serves as a charging plug.If the upper housing shell is equipped with a separate charging plug with a charging line section, according to a further variant of the charging plug, a switching device for connecting or disconnecting the charging plug to or from the charging line section is optionally provided, i.e. the battery charging device can thus optionally be switched off or the connection to the battery charging device can be established as desired only in specific operating situations. For example, such a connection can only be established when a sufficient charging voltage is present at the charging plug.If such a switching device is optionally provided for connecting or disconnecting the charging plug to or from the charging line section, a measuring line section can optionally be arranged on the upper housing shell for this switching device, which measuring line section serves for transmitting a measured value of a charging voltage at the charging plug, wherein this measured value is preferably transmitted to the traction battery connection unit and the switching device can be controlled in the aforementioned manner according to this measured value.In the assembly interface finally provided according to the invention, all electrical connections are produced between the connections of the traction battery connection unit and the upper housing shell. In the assembly interface, the traction line section is thus connected to the traction connections of the traction battery connection unit. Furthermore, depending on the variant provided according to the invention, there is formed a connection of the on-board power supply line to the on-board power supply connections of the traction battery connection unit and / or a connection of the charging line line to the charging connections of the traction battery connection unit and / or a connection of the measuring line line to measuring line connections of the traction battery connection unit.Finally, in a preferred embodiment, a connection of at least one pilot line to pilot line connections of the traction battery connection unit and / or a connection of control lines for controlling the switching device to control line connections of the traction battery connection unit is provided in the mounting interface, wherein the at least one pilot line serves for detecting a connection state of at least the charging plug and / or the traction plug and for transmitting at least one pilot signal in this respect to the traction battery connection unit.The inventive distribution of the above-described structural elements, namely the battery modules and the traction battery connection unit to the lower housing shell on the one hand and the traction plug with the traction line line, the on-board power supply plug with the on-board power supply line line line, the charging plug with the charging line line line line and the switching device, the measuring line line line, the at least one pilot line and the control lines to the upper housing shell on the other hand, as well as the formation of all electrical connections between the connections of the traction battery connection unit and the upper housing shell in a single, common assembly interface make possible simplified production and storage, since assemblies of less different design are to be produced and kept available for producing different variants in the equipment of the traction battery. Preferably, three variants of the traction battery are provided, namely• a so-called "AC variant", which merely has the traction plug with the traction line in the upper housing shell, optionally for this purpose the on-board power supply plug with the on-board power supply line and / or a pilot line to the traction plug,• a so-called "DC variant", which has the traction plug with the traction line section and the charging plug with the charging line section in the upper housing shell, optionally again the on-board power supply plug with the on-board power supply line section and / or at least one, preferably one pilot line each, to the traction plug and to the charging plug, and• a so-called "DC variant with contactors", which has the traction plug with the traction line section, the charging plug with the charging line section and the switching device for connecting or disconnecting the charging plug and charging line section in the upper housing shell, for this purpose optionally again the on-board power supply plug with the on-board power supply line section and / or at least one, preferably in each case one, pilot line to the traction plug and to the charging plug and / or to the switching device optionally the measuring line section.For each of these variants, a correspondingly variedly equipped upper housing shell is combined with the housing lower shell which is always of identical design and is always of identical design with the battery modules and the traction battery connection unit. The mounting interface according to the invention enables any combination of all differently equipped upper housing shells with the uniformly formed lower shell.By thus unifying and simplifying the construction of the case and its equipment, manufacturing lines for manufacturing the traction batteries formed therewith can be saved and simplified, thereby reducing costs. The construction also enables simplified and improved testing of the manufactured assemblies, since the upper housing shells with the fittings arranged therein can be tested separately from the lower housing shells with the battery modules and the traction battery connection unit and it is thereby possible in a simpler manner to test all the components of these fittings individually in a targeted manner. This enables an easy compliance with increased quality requirements; the test is also more reliable in that fewer circuit elements of the traction battery have to be tested overall under voltage. The advantage of greater safety is also obtained for the production of the upper housing shells with their equipment.According to the invention, the housing comprises the mounting interface:• a first adapter part which is connected to the traction battery connection unit and / or is guided in the traction battery connection unit and in which traction connections, charging connections and optionally the on-board power supply connections and / or the measurement connections are contained and / or guided, and• a second adapter part which is connected to the upper housing shell and / or is guided in the upper housing shell and in which connection elements of the traction line section, of the charging line section and optionally of the on-board power system line section and / or of the measuring line section are contained and / or guided,wherein the first and the second adapter part are joined together in a form-fitting manner in an assembly direction and engage one inside the other, in which the upper housing shell and the lower housing shell are also joined together to form the housing.Advantageous embodiments of the invention are characterized in the dependent claims.In this case, a spatial movement direction is referred to as the mounting direction here, in which the described elements-in this case the first and the second adapter part or the upper housing shell and the lower housing shell with the traction battery connection unit-are moved towards one another during the mounting process for the purpose of their connection. The mounting direction is preferably straight, i.e. the described elements are moved linearly towards one another during the mounting process for the purpose of their connection. In this case, this movement in particular does not contain any rotational or pivoting movement or change in a direction of movement. Particularly preferably, the mounting direction is aligned perpendicularly in a straight line, i.e. is based on a Cartesian coordinate system, which is spatially aligned in the usual manner, in the z-axis direction thereof. Accordingly, bringing together the described elements in the assembly process in this assembly direction is also referred to as z-axis assembly. This z-axis mounting is distinguished by a particularly simple handling of the elements to be mounted. The described elements are thus designed such that their mounting can be carried out by a movement, which leads towards one another, of at least one of the elements to be mounted in the mounting direction.According to the described development of the invention, the mounting directions when the first and second adapter parts are brought together, on the one hand, or the upper housing shell and the lower housing shell, are advantageously identical to the traction battery connection unit, on the other hand. The first and the second adapter part or the upper housing shell and the lower housing shell with the traction battery connection unit are preferably designed or arranged in such a way that with a single movement in the mounting direction which leads towards one another, both the upper housing shell with the lower housing shell and the first adapter part with the second adapter part are joined together at the same time.For this purpose, according to the described further development of the invention, the first adapter part is expediently connected to the traction battery connection unit and / or guided in the traction battery connection unit, and furthermore the second adapter part is connected to the upper housing shell and / or guided in the upper housing shell. In the first adapter part, in turn, the traction connections, the charging connections and optionally the on-board power supply connections and / or the measurement connections are contained and / or guided, and in the second adapter part, connection elements of the traction line section, of the charging line section and optionally of the on-board power supply line section and / or of the measurement line section are contained and / or guided.In this context, the term "connected" is used in the sense of an at least largely rigid connection of the respective designated elements. The term "guided" here means that a guided element can be moved by a guiding element and / or with the guiding element in a specific direction and / or in a specific spatial region without a rigid connection having to exist for this. A connection and guide configured in this way has in particular the property, i.e. is configured in such a way that, when the guiding element moves in particular in the mounting direction, the guided element carries out the same movement within a predefined tolerance range. In this case, in the case of a "connection" defined in this way, the tolerance range in which the movement of the connected element can be carried out is smaller than in the case of a "guide". As a result, it is possible in the case of a "guide" to compensate inaccuracies which occur in a positioning of the guiding elements with respect to one another during the assembly process when positioning the guided elements with respect to one another, i.e. to join the guided elements together nevertheless to narrow tolerances.Here, in this embodiment, the traction battery connection unit arranged in the housing lower shell forms the guiding element for the first adapter part, which, in contrast, represents a guided element. Accordingly, the upper housing shell forms the guiding element for the second adapter part, which, in contrast, constitutes a guided element. The first adapter part in turn forms a guiding element for traction connections, charging connections and optionally on-board power supply connections and / or measuring connections as elements guided in the first adapter part, and the second adapter part in turn forms a guiding element for connection elements of the traction line section, of the charging line section and optionally of the on-board power supply line section and / or of the measuring line section as elements guided in the second adapter part. A "guidance" of e.g. the first adapter part through the traction battery connection unit is then provided e.g. in that the first adapter part is arranged with a predefined clearance - transversely to or also in the mounting direction - on the traction battery connection unit. A flexible or resilient connecting element between the traction battery connection unit and the first adapter part can also form a "guide", in contrast to a rigid connection.In this way, the connection elements to be electrically connected to the designated connections, i.e. the traction connections to the connection elements of the traction line section, the charging connections to the connection elements of the charging line section and, if provided, the on-board power supply connections to the connection elements of the on-board power supply line section and the measuring connections to the connection elements of the measuring line section, are brought together simultaneously with the assembly process of the upper housing shell onto the lower housing shell at least for preparing their connection to one another without additional intervention or additional handling steps, wherein the positively engaging of the adapter parts ensures a precise, rapid and secure alignment, i.e. positioning, of the designated connections and connection elements with respect to one another. This enables a simple, reliable and rapid mounting process, i.e. simplified production of the housing according to the invention, because the upper housing shell can be brought from above onto the lower housing shell very easily by placing it in the mounting direction, preferably in the z-axis direction, i.e. in a very simple movement, and in the process can advantageously also be glued immediately, and at the same time this placing brings together the connections and connection elements for producing the electrical connections between the upper housing shell and the lower housing shell automatically. Such a z-axis assembly can be carried out simply, quickly and precisely, i.e. while maintaining low manufacturing tolerances, and can therefore also be automated easily and accident-proof, since the probability and thus risk of contact of elements under the voltage of the battery modules is reduced.In a further preferred embodiment of the housing according to the invention, at least some of the traction connections, the charging connections and optionally the on-board power supply connections and / or the measuring connections are connected, on the one hand, to associated connection elements of the traction line section, the charging line section and optionally the on-board power supply line section and / or the measuring line section, on the other hand, in a pluggable and / or screwable manner. Preferably, these connections are made by plugging and / or screwing in the z-axis direction. The connections can be made directly when the upper housing shell and the lower housing shell are brought together and / or subsequent to this bringing together in a separate assembly step. They can already be carried out completely during this joining, in particular carried out automatically, or can be carried out by a supplementary assembly process which comprises plugging and / or screwing, wherein in the latter case connections and connection elements are aligned with one another during the joining of the upper housing shell and the lower housing shell in preparation for the plugging and / or screwing. Particularly preferably, the connections of the traction connections and charging connections on the one hand can be screwed to associated connection elements of the traction line section and of the charging line section on the other hand, i.e. are formed by screws, e.g. with bolts and screw lugs, and the connections of the on-board power supply connections and of the measuring connections on the one hand to associated connection elements of the on-board power supply line section and of the measuring line section on the other hand can be plugged, i.e. are formed by plugging, e.g. with plug-in devices. In modifications, the connections of the traction connections and / or the charging connections can likewise be designed to be pluggable, or the connections of the on-board power supply connections and / or the measurement connections can be designed to be screwable.According to another preferred development of the housing according to the invention, all traction connections, charging connections and optionally on-board power supply connections and / or measurement connections are connected on the one hand to the associated connection elements of the traction line section, of the charging line section and optionally of the on-board power supply line section and / or of the measurement line section on the other hand in a pluggable manner. The pluggable connection enables particularly fast and secure production. In particular, all electrical connections between the upper housing shell and the lower housing shell can be formed simultaneously with the joining and adhesive bonding of the upper housing shell to the lower housing shell; the said connection elements are thus immediately connected to the traction battery connection unit beyond the alignment with the relevant connections thereof. Optionally, it is also possible to plug in the connections following the bringing together and alignment in a separate assembly step, which simultaneously enables individual checking of the connection during the assembly process, in particular by a person entrusted with the production.Furthermore, the risk of contact of voltage-carrying elements is further reduced during the assembly process carried out solely by plugging. The risk that, for example, a bolt for a screwable connection will enter the interior of the housing during the assembly process and cause faults, in particular damage, there as a result of short circuits is also prevented. These advantages, themselves, warrant potentially increased effort for forming the connections with plug-in devices.According to a further preferred embodiment of the housing according to the invention• at least one, preferably one, mounting opening is arranged in the upper housing shell, preferably on an upper side of the upper housing shell, and• If the mounting interface is arranged on an inner side of the upper housing shell in the region of the at least one, preferably one, mounting opening in the upper housing shell so as to be accessible from an outer side of the housing in the mounting direction, in which upper housing shell and lower housing shell are brought together to form the housing.According to this embodiment, the upper housing shell can be configured with one or more mounting openings. However, preferably only a single mounting opening is provided in order to design the upper housing shell as simply as possible and thus keep the manufacturing outlay low, also with regard to a required, possibly hermetic, sealing of the housing, which also requires a corresponding sealing of the mounting opening. The arrangement of the mounting opening on an upper side of the upper housing shell allows access through the mounting opening to the interior of the housing in the mounting direction, i.e. the z-axis direction.In this embodiment, the assembly interface with the traction connections, the charging connections and optionally the on-board power supply connections and / or the measurement connections and the associated connection elements of the traction line section, the charging line section and optionally the on-board power supply line section and / or the measurement line section is advantageously arranged within the housing in the region, i.e. behind, the assembly opening. Through the mounting opening, the mounting interface is thus accessible from the outside of the housing in the mounting direction, i.e. in the z-axis direction. Thus, all the assembly work that is still to be carried out after the upper housing shell has been brought together with the lower housing shell, i.e. in particular the establishment of the electrical connections, can be carried out unimpeded also in the assembly direction, i.e. the z-axis direction; for example, plug connections can be carried out by a plug-in movement in the assembly direction, or bolts for a screw connection can be screwed in in the assembly direction. This simplifies the production and also enables or facilitates an automation of this assembly step, i.e. a simple embodiment by means of manufacturing robots, since the simple plug-in or screw movement in the common assembly direction can also be easily and precisely carried out with manufacturing robots.A particularly preferred embodiment of the housing according to the invention is distinguished by the cooperation of the following features which form the basis of the preceding explanation:• all connections and connection elements of the assembly interface, i.e. all traction connections, charging connections and optionally on-board power supply connections and / or measurement connections on the one hand, and all associated connection elements of the traction line section, of the charging line section and optionally of the on-board power supply line section and / or of the measurement line section on the other hand, are connected in a pluggable manner,• All connections on the one hand and all associated connection elements on the other hand are arranged combined in a common, combined plug-in device, so that all electrical connections between the upper housing shell and the lower housing shell are produced in the assembly direction with a single, common assembly step, i.e. plug-in process, and• The upper housing shell has a mounting opening.The combined plug-in device preferably forms the assembly interface.This combination of features combines the advantages of a simple design of the upper housing shell with the smallest possible number of components and sealing points with the advantages of an electrical connection with high production quality that can be produced easily, quickly and reliably. Even if additional costs should arise, for example, due to the common, combined plug-in device, these are compensated for by the aforementioned simplifications of the design and assembly of the upper housing shell and the manufacturing steps during the assembly of the upper housing shell and the lower housing shell.The above-mentioned object is also achieved by a housing upper shell for a housing of the above-described type.The object mentioned above is also achieved by a traction battery which comprises a housing of the type described above and at least one battery module.The above-mentioned object is also achieved by an electrically drivable vehicle which is equipped with a traction battery of the type described and specified above.The lower housing shell, the upper housing shell, the traction battery and the vehicle of the type configured according to the invention likewise have the features, properties and advantages which are explained above for the housing according to the invention.The described configuration according to the invention of the traction battery and its lower housing shell and upper housing shell and in particular the modular arrangement of the elements of the traction battery on the lower housing shell and the upper housing shell enables a preliminary production, which is also completely separate locally, of the lower housing shell on the one hand and of the variants of the upper housing shell on the other hand, which are only assembled in the last production section. This makes it possible to make manufacturing systems for manufacturing the traction batteries even more flexible. For example, the production of the uniformly constructed housing lower shell can be transferred to a production operation specialized for this; the completely pre-assembled housing lower shells are then supplied as a supply part to the production plant for the assembly of the housing lower shell and the housing upper shell. This can also be carried out correspondingly during the production of the upper housing shell.The object mentioned above is finally achieved by a method for mounting a housing of a traction battery of an electrically drivable vehicle, i.e. for assembling the housing from an upper housing shell and a lower housing shell, wherein the method according to the invention has the following method steps:• In a first step, an upper housing shell and a lower housing shell are brought together in an assembly direction to form the housing and are connected to one another in a form-fitting manner, in the process a first adapter part connected to a traction battery connection unit arranged in the housing lower shell of the housing and / or guided in the traction battery connection unit, in which adapter part traction connections, and charging connections and optionally on-board power supply connections and / or measurement connections are contained and / or guided, and a second adapter part which is connected to the upper housing shell of the housing and / or is guided in the upper housing shell and in which connection elements of a traction line section, of a charging line section and optionally of an on-board power supply line section and / or of a measurement line section are contained and / or guided,in the same mounting direction, the upper shell of the housing and the lower shell of the housing are brought together in a positively locking manner to form the housing;• In a second step, during and / or after the positive-locking joining together and thereby mechanical connection of the first and the second adapter part to one another, the components are joined together in a positively locking manner.◯ the traction connections, the charging connections and optionally the on-board power supply connections and / or the measurement connections and the connection elements of the traction line section and of the charging line section and optionally of the on-board power supply line section and / or of the measuring line sectionthrough a mounting opening in the upper housing shell in the same mounting direction in which the upper housing shell and the lower housing shell are brought together to form the housing, are plugged and / or screwed and thereby electrically conductively connected to one another.If, in this second step, existing plugs, in particular for the on-board power supply system and / or the measuring line string, are not already automatically plugged or latched when the upper housing shell is brought together, in particular placed on the lower housing shell, and thus when the first and second adapter parts are brought together, this plugging or latching of existing plugs takes place after the electrical connections to be screwed have been screwed together, wherein, in particular, the traction and / or charging line string is screwed to the traction connections or the charging connections.• Optionally to the above-described second method step of producing the electrical connections, i.e. in a variation thereof, become the following:◯ the traction connections and the charging connections and optionally the power supply connections and / or the measurement connections on the one hand and the connection elements of the traction line section, of the charging line section and optionally of the on-board power supply line section and / or of the measuring line section on the other handIn the same mounting direction, in which the upper housing shell and the lower housing shell are brought together to form the housing, the connection is exclusively plugged and thus electrically conductively connected to one another.In this case, for carrying out the second method step for the mounting interface, the mounting opening is provided in the upper side of the upper housing shell, and the screwing and / or plugging and / or latching in the mounting direction, in particular the z-axis direction, i.e. in the usual working position during production from above, is carried out by means of the mounting opening. The first and second method steps can preferably be carried out automatically, i.e. by a manufacturing robot or the like, successively or simultaneously or in a time profile in which the method steps overlap one another in time, with simple and thus precisely executable movements of this manufacturing robot. Finally, the mounting opening is closed, likewise preferably automatically and exclusively in the mounting direction. This achieves cost-effective and high-quality production.As a prerequisite for carrying out the specified variation of the second method step, all lines in a combined plug-in device having connections or connection elements, which are designed in particular in the form of plugs and sockets, are combined on the upper housing shell or on the traction battery connection unit of the lower housing shell. This plug-in device, i.e. its plugs and sockets, are brought together, for example with the aid of a conically designed guide, when the upper housing shell is placed on the lower housing shell, like the first adapter part and the second adapter part, and are plugged and / or locked. No mounting opening is required for performing this variation of the second method step, and also in the case of automation, the manufacturing sequence of the second method step is significantly simplified by reducing to a single, simple movement of the merging in the mounting direction.Exemplary embodiments of the invention are illustrated in the drawing and are described in more detail below, wherein corresponding elements in all figures are provided with the same reference numerals and a repeated description of these elements is omitted. The following are shown: FIG. 1 shows a roughly schematic block diagram of an example of a traction battery designed according to the invention in a so-called "AC variant" for an electrically drivable vehicle, FIG. 2 shows a roughly schematic block diagram of a modification of the traction battery according to FIG. 1, designed according to a so-called "DC variant", FIG. 3 shows a roughly schematic block diagram of a further modification of the traction battery according to FIGS. 1 and 2, designed according to a so-called "DC variant with contactors, FIG. 4 shows a bottom view, i.e. inner view, of an example of an upper housing shell with elements arranged therein, in particular electrical circuit elements, of the traction battery in the embodiment of the so-called "AC variant" according to the roughly schematic block diagram of FIG. 1 in roughly schematic illustration, reproduced in a first viewing direction counter to the mounting direction, i.e. z-axis direction, FIG. 5 shows a bottom view, i.e. inner view, of an example of an upper housing shell with elements arranged therein, in particular electrical circuit elements, of the traction battery in the embodiment of the so-called "DC variant" according to the roughly schematic block diagram of FIG. 2 in roughly schematic representation, likewise reproduced in the first viewing direction counter to the mounting direction, FIG. 6 shows a bottom view, i.e. inner view, of an example of an upper housing shell with elements arranged therein, in particular electrical circuit elements, of the traction battery in the embodiment of the so-called "DC variant with contactors" according to the roughly schematic block diagram of FIG. 3 in roughly schematic representation, likewise reproduced in the first viewing direction counter to the mounting direction, FIG. 7 shows the bottom view, i.e. inner view, of the example of the upper housing shell with elements arranged therein, in particular electrical circuit elements, of the traction battery in the embodiment of the so-called "DC variant with contactors" according to the roughly schematic block diagram of FIG. 3, i.e. according to FIG. 6, in a detailed illustration, likewise reproduced in the first viewing direction counter to the mounting direction, FIG. 8 shows an enlarged detail of a bottom view, i.e. inner view, of the example of the upper housing shell with elements arranged therein, in particular electrical circuit elements, of the traction battery in the embodiment of the so-called "DC variant with contactors" according to the detailed illustration according to FIG. 7, illustrated in a perspective view from a second viewing direction which is modified in relation to FIG. 7, with a representation of an exemplary embodiment of a mounting interface configured according to the invention, FIG. 9 shows an enlarged detail of a view of a housing lower shell of an example of a traction battery configured according to the invention with a traction battery connection unit and a representation of the exemplary embodiment of the mounting interface depicted in FIG. 8 in a perspective, schematic illustration from a third viewing direction, FIG. 10 shows a further enlarged detail of a view of the housing lower shell of the example of the traction battery according to FIG. 9 embodied according to the invention with the traction battery connection unit and a representation of the exemplary embodiment of the mounting interface depicted in FIGS. 8 and 9 in a perspective, schematic illustration from a fourth viewing direction modified in comparison with FIG. 9, FIG. 11 shows the joined adapter parts of the embodiment of the mounting interface depicted in FIGS. 8, 9 and 10, reproduced in a plan view with a fifth viewing direction opposite the first viewing direction, i.e. a viewing direction in the mounting direction, FIG. 12 shows an overall view of the example of the traction battery designed according to the invention in one of the embodiments of the so-called "DC variant" or the so-called "DC variant with contactors" in the ready-to-use production state after assembly of the upper housing shell designed according to the representations of FIGS. 2, 3 or 5 to 8 with the lower housing shell designed according to the representations of FIG. 9 or 10, comprising traction plug, charge plug, on-board power supply connector and mounting opening, in a schematic, perspective representation, reproduced in a sixth viewing direction, and FIG. 13 shows an enlarged detail of the example of the traction battery according to FIG. 12 configured according to the invention, with a detailed view of the traction plug, of the on-board power supply system plug and of the mounting opening, in a schematic, perspective illustration, reproduced in the sixth viewing direction.FIG. 1 shows an example of a traction battery for an electrically drivable vehicle, which traction battery is designed according to the invention in a so-called "AC variant", as a roughly schematic block diagram and is denoted by the reference symbol 200. The traction battery 200 comprises one or more battery modules 201, referred to below in simplified form as battery modules 201, the detailed circuit of which is not discussed in more detail here and which are therefore indicated only by a simple symbol in FIG. 1. A positive pole 202 and a negative pole 203 of the battery modules 201 are connected to a traction battery connection unit 204. In addition, the battery modules 201 are connected to the traction battery connection unit 204 via battery measuring lines 205, in particular for measuring a temperature and one or more electrical voltages, preferably one or more cell voltages. The traction battery connection unit 204, whose detailed circuit is likewise not explained in more detail, comprises devices, preferably control devices, in particular for the operation of the traction battery 200, via which the battery modules 201 are connected to different connections of the traction battery connection unit 204.As such connections, the traction battery connection unit 204 has a first traction connection 206 and a second traction connection 207, which are provided, on the one hand, for delivering electrical energy from the traction battery 200 to a traction drive of the electrically drivable vehicle and, on the other hand, for supplying a charging current for charging the battery modules 201. The first and second traction connections 206, 207 thus simultaneously form a first charging connection 206 aand a second charging connection 207 aof the traction battery connection unit 204 in this example. However, modifications of the traction battery connection unit 204 are also possible, which have charging connections separate from the traction connections.Furthermore, the traction battery connection unit 204 according to FIG. 1 is designed with on-board power supply connections 208. The generally and also in the present exemplary embodiment a plurality of on-board power supply connections 208 are reproduced in FIG. 1 with a common circuit symbol which here represents a multipolar electrical connection. In one embodiment, the vehicle electrical system connections 208 can also include pilot line connections-not shown here-which are intended for connecting at least one pilot line-likewise not shown in FIG. 1-to the traction battery connection unit 204, as is explained in greater detail below.The traction battery connection unit 204 also has measurement connections 209. Here too, a plurality of measurement connections 209 are preferably provided, which are reproduced in FIG. 1 with a common circuit symbol which represents a multipolar electrical connection.In addition, the traction battery connection unit 204 according to FIG. 1 is formed with control line connections 210, which are provided in particular for controlling switching devices, as is explained in more detail below.The battery modules 201 and the traction battery connection unit 204 with the traction connections 206 and 207, the on-board power supply connections 208, the measurement connections 209 and the control line connections 210 are accommodated jointly in a housing lower shell 101 of a housing 100 of the traction battery 200 described in greater detail below.The "AC variant" of the traction battery 200 illustrated in FIG. 1 furthermore comprises an upper housing shell 102 which is equipped with a traction line 211 which comprises a first traction conductor 212 and a second traction conductor 213, wherein the first traction conductor 212 is intended to be connected via the traction battery connection unit 204 to the positive pole 202 of the battery modules 201 of the traction battery 200, and the second traction conductor 213 is intended to be connected via the traction battery connection unit 204 to the negative pole 203 of the battery modules 201 of the traction battery 200. For this purpose, the first traction conductor 212 has a first connection element 214, and the second traction conductor 213 has a second connection element 215. The first connection element 214 of the first traction conductor 212 is connected to the first traction terminal 206 and the second connection element 215 of the second traction conductor 213 is connected to the second traction terminal 207. For connecting the traction line section 211 of the traction battery 200, i.e. for connecting the battery modules 201 to at least one external electrical device arranged outside the housing 100, in particular a traction drive of the vehicle, the traction line section 211 furthermore has a traction plug 216 having a first contact 217 which is connected to the first traction conductor 212 and a second contact 218 which is connected to the second traction conductor 213. The traction plug 216 is arranged in the upper housing shell 102 and can be connected to a matching, e.g. socket-like counterpart of the external electrical device arranged outside the housing 100, in this case in particular the traction drive of the vehicle.The upper housing shell 102 of the "AC variant" of the traction battery 200 illustrated in FIG. 1 is furthermore equipped with an on-board power supply system line section 219, which is multi-polar here and has a third connection element 220, which is likewise multi-polar in design in accordance with the on-board power supply system line section 219. The multipolar third connection element 220 of the on-board power supply line section 219 is connected to the multipolar on-board power supply connections 208 of the traction battery connection unit 204. On the other hand, the multipolar on-board power supply line 219 is connected to a correspondingly likewise multipolar on-board power supply plug 221 for connecting the on-board power supply line 219 of the traction battery 200, i.e. for connecting the on-board power supply connections 208 of the traction battery connection unit 204, to at least one external electrical device arranged outside the housing 100, in this case in particular an on-board power supply of the vehicle. For this purpose, the vehicle electrical system connector 221 is arranged in the upper housing shell 102 and can be connected to a matching, e.g. socket-like, counterpart of the external electrical device arranged outside the housing 100, in this case in particular an electrical system of the vehicle.All the above-described electrical connections between the terminals of the traction battery terminal unit 204 and the upper housing shell 102 are produced in a mounting interface 222 provided according to the invention. In this mounting interface 222, the traction line section 211 is thus connected via the first connection element 214 to the first traction connection 206 and via the second connection element 215 to the second traction connection 207. Furthermore, there is a connection of the vehicle electrical system line section 219 via the third connection element 220 to the vehicle electrical system connections 208 of the traction battery connection unit 204.The mounting interface 222 also includes the measurement terminals 209 and the control line terminals 210 of the traction battery terminal unit 204. In FIG. 1, a fourth connection element 223 is furthermore shown in the mounting interface 222 on the side of the upper housing shell 102, which is connected to the measurement connections 209, and a fifth connection element 224 is connected to the control line connections 210. The fourth connection element 223 and the fifth connection element 224 are provided for connecting devices which are explained in more detail below. Since no such devices are connected to the measurement connections 209 and the control line connections 210 of the traction battery connection unit 204 in the case of the "AC variant" illustrated here, however, in the upper housing shell 102, the fourth connection element 223 and the fifth connection element 224 can optionally also be omitted here.The mounting interface 222 comprises a first adapter part 225 connected to the traction battery connection unit 204, in which the traction connections 206, 207, the on-board power supply connections 208, the measurement connections 209 and the control line connections 210 are contained, and a second adapter part 226 connected to the housing upper shell 102, in which the connection elements 214, 215 of the traction line section 211, the third connection element 220 of the on-board power supply line section 219 and here optionally the fourth connection element 223 and the fifth connection element 224 are contained. In order to establish the above-described electrical connections between the connections of the traction battery connection unit 204 and the upper housing shell 102, the adapter parts 225, 226 are joined together.FIG. 2 shows a roughly schematic block diagram of a modification of the traction battery 200 according to FIG. 1, which modification is designed according to a so-called "DC variant"; this "DC variant" is denoted by the reference symbol 240. The traction battery 240 according to the "DC variant" contains all elements of the traction battery 200 according to the "AC variant", to the above description of which reference is made, that is to say corresponds in this respect completely to this. In particular, the housing lower shell 101 and all the elements arranged therein, including the first adapter part 225, are configured unchanged from the "AC variant". All the described elements of the upper housing shell 102 illustrated in FIG. 1 are also present. In addition, the upper housing shell provided in the "DC variant" and designated by the reference sign 142 is equipped with a charging plug 241 and a charging line strand 242. In this "DC variant", a housing denoted here by the reference numeral 140 is formed with the housing lower shell 101 and the housing upper shell 142.The charging line string 242 comprises a first charging conductor 243 and a second charging conductor 244, wherein the first charging conductor 243 is intended to be connected via the traction battery connection unit 204 to the positive pole 202 of the battery modules 201 of the traction battery 240 and the second charging conductor 244 is intended to be connected via the traction battery connection unit 204 to the negative pole 203 of the battery modules 201 of the traction battery 240. For this purpose, the first charging conductor 243 is connected to the first connection element 214 of the first traction conductor 212 of the traction line section 211, and the second charging conductor 244 is connected to the second connection element 215 of the second traction conductor 213 of the traction line section 211. In this way, the first charging conductor 243 is connected to the first traction terminal 206 which-as in the case of the "AC variant"-simultaneously forms the first charging terminal 206a, and the second charging conductor 244 is connected to the second traction terminal 207 which-as in the case of the "AC variant"-simultaneously forms the second charging terminal 206b.For connecting the charging line section 242 of the traction battery 240, i.e. for connecting the battery modules 201, to at least one external electrical device arranged outside the housing 140, in particular an external electrical device designed as a battery charging device, the charging line section 242 is connected to the charging plug 241. The charging plug 241 includes a first contact 245 connected to the first charging conductor 243 and a second contact 246 connected to the second charging conductor 244. The charging plug 241 is arranged in the upper housing shell 142 and-comparable to the traction plug 216-can be connected to a matching, e.g. socket-like counterpart of the external electrical device arranged outside the housing 140, here in particular the battery charging device.Also in the "DC variant" of the traction battery 240 according to FIG. 2, the fourth connection element 223, which is connected to the measurement connections 209, and the fifth connection element 224, which is connected to the control line connections 210, are shown in the mounting interface 222 on the side of the upper housing shell 142. However, since no such devices are connected to the measurement connections 209 and the control line connections 210 of the traction battery connection unit 204 in the upper housing shell 142 even in the case of the "DC variant" illustrated here, the fourth connection element 223 and the fifth connection element 224 can optionally likewise be omitted here.FIG. 3 shows a roughly schematic block diagram of a modification, designed according to a so-called "DC variant with contactors", of the traction battery 200 according to FIG. 1 or of the traction battery 240 according to FIG. 2; this "DC variant with contactors" is denoted by the reference symbol 280. The traction battery 280 according to the "DC variant with contactors" contains all elements of the traction battery 240 according to the "DC variant", to the above description of which reference is made, that is to say corresponds in this respect completely to this. In particular, the housing lower shell 101 and all the elements arranged therein, including the first adapter part 225, are again configured unchanged both with respect to the "AC variant" and with respect to the "DC variant". All the described elements of the upper housing shell 102 shown in FIG. 1 and of the upper housing shell 142 shown in FIG. 2 are also present. In addition, the upper housing shell provided with contactors in the "DC variant" and designated by the reference numeral 182 is equipped with a switching device 281. In this "DC variant with contactors", a housing, denoted here by the reference numeral 180, is formed with the housing lower shell 101 and the housing upper shell 182.The switching device 281 comprises a first DC contactor 282, which is inserted into the first charging conductor 243 of the charging line section 242 for connecting the first charging conductor 243 to the first contact 245 of the charging plug 241 or for disconnecting the first charging conductor 243 from the first contact 245, and a second DC contactor 283, which is inserted into the second charging conductor 244 for connecting the second charging conductor 244 to the second contact 246 of the charging plug 241 or for disconnecting the second charging conductor 244 from the second contact 246. Control lines 284 for controlling the switching device 281, i.e. for switching the DC contactors 282, 283, are led to the DC contactors 282, 283 of the switching device 281. These control lines 284 are connected to the fifth connection element 224 in the second adapter part 226 of the mounting interface 222 and are thereby connected to the control line connections 210 of the traction battery connection unit 204. As a result, the contactors 282, 283 can be controlled, i.e. switched, via the traction battery connection unit 204.Furthermore, the upper housing shell 182 is equipped with a measurement line string 285 for transmitting a measurement value of a charging voltage at the charging plug 241, i.e. at its first and second contacts 245, 246, to the traction battery connection unit 204. For this purpose, the measuring line string 285 is led to the fourth connection element 223 and from there connected to the traction battery connection unit 204 via the measuring connections 209. As a result, a charging voltage at the charging plug 241 can be monitored by the traction battery connection unit 204 and the DC contactors 282, 283 can be switched as a function of the charging voltage.Optionally, the upper housing shells 102, 142, 182 of the traction battery 200, 240, 280, respectively, can also be equipped with at least one pilot line, which is not shown in FIGS. 1 to 3, however. The at least one pilot line serves for detecting a connection state of at least the charging plug 241 and / or the traction plug 216 and for transmitting at least one pilot signal in this regard to the traction battery connection unit 204 and / or via the on-board power supply line line 219 to the on-board power supply system of the vehicle. Accordingly, the mounting interface 222 may include additional connectors and connectors.In the manner described above, three different variants of the traction battery 200, 240 or 280 can be produced only by slightly varying the equipment exclusively of the upper housing shells 102, 142 or 182 with the configuration of the lower housing shell 101 unchanged.FIG. 4 shows a bottom view, i.e. an inner view, reproduced in a first viewing direction counter to the mounting direction, i.e. z-axis direction, of the upper housing shell 102 according to the exemplary embodiment of the traction battery 200 in the "AC variant" shown in FIG. 1 as a roughly schematic block diagram, wherein electrical circuit elements arranged therein are roughly schematically indicated. The upper housing shell 102 comprises a hood 103 which is formed with an insulating material and / or an electromagnetically shielding material. The upper housing shell 102 is depicted in FIG. 4 with its end facing the rear of the vehicle in the intended installation position in the vehicle, whereas its end facing the right faces an engine compartment of the vehicle.At this end of the upper housing shell 102 depicted on the right, an opening for installing the traction plug 216 is provided in the hood 103 in a framed region, from which opening the traction line 211 with the first traction conductor 212 and the second traction conductor 213 leads to the mounting interface 222, the position of which is likewise denoted by a framed region in FIG. 4, in which the first connection element 214 of the first traction conductor 212 and the second connection element 215 of the second traction conductor are depicted schematically in a roughly schematic manner. For this purpose, a fastening element 104 is schematically indicated for each of the traction conductors 212, 213, with which fastening elements the traction conductors 212, 213 are fixed on the inner surface of the hood 103 of the upper housing shell 102. Furthermore, the on-board power supply line 219 and the third connection element 220 in the region of the mounting interface 222 are indicated. Optionally, in the illustration of FIG. 4, the on-board power supply line line string 219 also comprises a pilot line from the mounting interface 222 to the traction plug 216.FIG. 5 shows a bottom view of the upper housing shell 142 according to the exemplary embodiment of the traction battery 240 in the "DC variant" shown in FIG. 2 as a roughly schematic block diagram, wherein electrical circuit elements arranged therein are again roughly schematically indicated according to the illustration of FIG. 4. The upper housing shell 142 again comprises the hood 103, which is also inserted in the upper housing shell 102 of the "AC variant", and all the elements described with reference to FIG. 4, i.e. electrical equipment.The hood 103 has, at its end facing the rear of the vehicle in the intended installation position in the vehicle-again shown facing to the left in FIG. 5-an opening for installing the charging plug 241, which is indeed likewise present when the upper housing shell 102 is formed according to the "AC variant" according to FIG. 4 for the purpose of the greatest possible use of identical parts, but is closed, for example with a matching cover. The opening for installing the charging plug 241 is also highlighted by a framed area. From the mounting interface 222 to the charging plug 241, the charging line section 242 with the first charging conductor 243 and the second charging conductor 244 is laid along the inner surface of the hood 103 of the housing upper shell 142 and is fixed there by means of a number of fastening elements 144. In parallel with this, a pilot line 247 is routed from the mounting interface 222 to the charging plug 241 and is routed in the mounting interface 222 to the third connection element 220.FIG. 6 shows a bottom view of the upper housing shell 182 according to the exemplary embodiment of the traction battery 280 shown in FIG. 3 as a roughly schematic block diagram in the "DC variant with contactors", wherein electrical circuit elements arranged therein are again roughly schematically indicated corresponding to the illustration of FIGS. 4 and 5. The upper housing shell 182 again comprises the hood 103, which is also inserted in the upper housing shell 102 of the "AC variant" and the upper housing shell 142 of the "DC variant", as well as all the elements described with reference to FIGS. 4 and 5, i.e. electrical equipment.In the upper housing shell 182, the switching device 281, which is additionally provided in the "DC variant with contactors" compared to the "DC variant" and comprises the first DC contactor 282 and the second DC contactor 283, is arranged directly on the charging plug 241. Accordingly, both the control lines 284 between the mounting interface 222 and the switching device 281 and the measuring line string 285 between the mounting interface 222 and the charging plug 241 are laid along the inner surface of the hood 103 of the housing upper shell 182 parallel to the charging line string 242 with the first charging conductor 243 and the second charging conductor 244 and are also fixed there-e.g. also by means of the fastening elements 144.Preferably, the control lines 284 can be combined with the pilot line 247 leading to the charging plug to form a jointly laid line string, i.e. cable harness. This jointly laid line section is particularly preferably also combined with the on-board power supply line section 219, in particular is encompassed by the on-board power supply line section 219 just as is the aforementioned pilot line from the mounting interface 222 to the traction plug 216. Accordingly, in this particularly preferred embodiment, the fifth connection element 224 of the control lines 284 is combined with the third connection element 220 of the on-board power supply line section 219 or is surrounded by the third connection element 220. In these combinations, only lines with low voltages in the voltage range of the on-board power supply system of the vehicle are combined to form a low-voltage cable harness. In contrast, the measuring line string 285, which is designed to carry a charging voltage, i.e. a voltage at the level of the battery voltage, is laid separately from this low-voltage cable harness and is guided to the fourth connection element 223 in the mounting interface 222.FIG. 7 shows, in the same bottom view as FIG. 6, the upper housing shell 182, which is schematically depicted there and has the elements, in particular electrical circuit elements, arranged therein, of the traction battery 280 in the embodiment of the "DC variant with contactors", in which in particular the mounting interface 222, the traction plug 216 with the on-board power supply plug 221 and the charging plug 241 with the switching device 281 are depicted in a detailed, natural representation. Also shown in FIG. 7 are fasteners 184 for securing the control lines 284 and the sensing line string 285 to the inner surface of the hood 103 of the upper housing shell 182. Advantageously, the charging plug 241 and the switching device 281, on the one hand, and the traction plug 216 and the on-board power supply plug 221, on the other hand, are each combined in a plug receptacle, whereby assembly is facilitated.FIG. 8 shows an enlarged detail of the bottom view of the end of the upper housing shell 182 facing the engine compartment of the vehicle in the intended installation position in the vehicle in the embodiment of the "DC variant with contactors" according to FIG. 7 with the electrical circuit elements arranged therein, in particular the mounting interface 222, the traction plug 216 and the on-board power supply plug 221, illustrated in a perspective view. The mounting interface 222 is formed with the first adapter part 225 and the second adapter part 226. The second adapter part 226 is connected to the upper housing shell 182 and / or is guided in the upper housing shell 182 with a predefined range of movement with respect to the upper housing shell 182. In the second adapter part 226, the first and the second connection element 214, 215 of the traction line section 211 and thus also of the charging line section 242, the third connection element 220 of the on-board power supply line section 219 and the fourth connection element 223 of the measurement line section 285 are again contained and / or guided. The first adapter part 225 is connected to the traction battery connection unit 204, not shown in FIG. 8, and / or is guided in the traction battery connection unit 204 with a predefined movement clearance with respect to the traction battery connection unit 204. In the first adapter part 225, for their part, the traction connections or charging connections 206, 207, the on-board power supply connections 208 and the measurement connections 209 are contained and / or guided.The first 225 and the second adapter part 226 are joined together in a positive-locking manner in the mounting direction, i.e. the z-axis direction in which the upper housing shell 102, 142 or 182 and the lower housing shell 101 are also joined together to form the housing 100, 140 or 180, and engage one in the other. For this purpose, in particular the second adapter part 226 is configured with guides tapering conically in the mounting direction, here in particular guide surfaces, along which the first adapter part 225 slides during the bringing together and is thus centred, i.e. aligned. Furthermore, here too, the first 225 and the second adapter part 226 are identical for the purpose of the greatest possible use of identical parts for all variants of the traction battery 200, 240, 280.FIG. 8 also shows that in the exemplary embodiment of the upper housing shell 182 shown, the charging line section 242 is only led as far as the traction plug 216, and that the traction line section 211 between the traction plug 216 and the traction battery connection unit 204 here also serves as part of the charging line section 242. This results in a simple structure.FIG. 9 shows a perspective, schematic illustration of an enlarged detail of a view of the housing lower shell 101 of the example of the traction battery 200, 240 or 280 configured according to the invention from a third viewing direction. To illustrate the structure, in particular of the exemplary embodiment of the mounting interface 222 with the first 225 and the second adapter part 226 depicted in FIG. 8, the elements of the equipment of the upper housing shell 182 according to the "DC variant with contactors" are also depicted, as are also shown in FIG. 8; only the hood 103 of the upper housing shell 182 is omitted for the sake of clarity. The housing lower shell 101 comprises a tray 105 which, like the hood 103, is formed with an insulating material and / or an electromagnetically shielding material and also as a supporting component for the battery modules 201 and the traction battery connection unit 204. The enlargement of the detail of the view of the housing lower shell 101 according to FIG. 9 represents only the end of the housing lower shell 101 facing the engine compartment of the vehicle in the intended installation position of the traction battery 200, 240 or 280 in the vehicle and depicted facing to the right in the illustration according to FIG. 9.The traction battery connection unit 204 arranged in the trough 105 of the housing lower shell 101 at its engine compartment-side end is reproduced in FIG. 9 only with its outer contours; further structural details are of no significance here. Battery modules 201, which are also not shown in detail, are also accommodated in the trough 105. On the traction battery connection unit 204, the mounting interface 222 with the first 225 and the second adapter part 226 is arranged in the mounting direction, i.e. z-axis direction, i.e. on the top of the traction battery connection unit 204 in the illustration of FIG. 9. The second adapter part 226 is equipped with screws 106, by means of which the second adapter part 226 is fastened to the hood 103 of the upper housing shell 182 or 102 or 142. As will be shown below, the screws 106 can simultaneously serve for closing an installation opening in the hood 103 arranged above the installation interface in the installation direction.According to the illustration of FIG. 9, the mounting interface 222 is configured such that, when the upper housing shell 182 is joined to the lower housing shell 101 and thus simultaneously the second adapter part 226 is joined to the first adapter part 225, both the first connection element 214 of the first traction conductor 212 is joined to the first traction connection 206 of the traction battery connection unit 204, the second connection element 215 of the second traction conductor 213 is joined to the second traction connection 207 of the traction battery connection unit 204 and the third connection element 220 of the on-board power supply line section 219 is joined to the on-board power supply connections 208 of the traction battery connection unit 204 and the fourth connection element 223 of the measurement line section 285 is joined to the measurement connections 209 of the traction battery connection unit 204. The fifth connection element 224 of the control lines 284 is included here by the third connection element 220 of the vehicle electrical system line section 219, and the control line connections 210 of the traction battery connection unit 204 are included by the vehicle electrical system connections 208. In this case, the first connection element 214, the first traction connection 206, the second connection element 215 and the second traction connection 207 are configured to be connected to one another by means of a screw connection for each of the connections, in contrast to which the third connection element 220 and the fifth connection element 224 combined therewith here, the on-board power supply connections 208 and the control line connections 210 combined therewith here, the fourth connection element 223 and the measurement connections 209 are configured to carry out plug connections. After the upper housing shell 182 has been assembled with the lower housing shell 101, the relevant connections are screwed or plugged in from above in the assembly direction, i.e. in the z-axis direction and thus-in relation to the intended installation position of the traction battery 280 in the vehicle. FIG. 9 shows these connections in the screwed or plugged production state.FIG. 10 shows a further enlarged detail of a view of the housing lower shell 101 of the example of the traction battery 280 according to FIG. 9 with the traction battery connection unit 204 and a representation of the exemplary embodiment of the mounting interface 222 depicted in FIGS. 8 and 9 in a perspective, schematic illustration from a fourth viewing direction modified in comparison with FIG. 9. In this case, in addition to the hood 103, the second adapter part 226 is also omitted in the illustration of FIG. 10, such that the alignment of the connection elements 214, 215, 220, 223 or 224 described in relation to FIG. 9 and connected to one another or to be connected to one another and connections 206, 207, 208, 209 or 210 to one another and in the mounting interface 222, in particular to the first adapter part 225, can be seen.FIG. 11 shows an illustration of the joined adapter parts 225, 226 of the exemplary embodiment of the mounting interface 222 depicted in FIGS. 8, 9 and 10, reproduced in a plan view in the mounting direction. In this joined-together position, the adapter parts 225, 226 engage one inside the other in a form-fitting manner, wherein the second adapter part 226 engages around the first adapter part 225. As a result, guides-designed as guide surfaces or guide contours-of the first adapter part 225 for the connections 206, 207, 208, 209 and 210 to be received and guided thereby are brought into alignment with guides of the second adapter part 226 for the connection elements 214, 215, 220, 223 and 224 to be received and guided thereby in the mounting direction. In particular, in the example of FIG. 11, these are: first guides 107 for the first traction connection 206 and the first connection element 214; second guides 108 for the second traction connection 207 and the second connection element 215; third guides 109 for the on-board power supply connections 208, here combined with the control line connections 210, and the third connection element 220, here combined with the fifth connection element 224; and fourth guides 110 for the measurement connections 209 and the fourth connection element 223.This configuration of the mounting interface 222 simultaneously creates a reliable electrical insulation between the terminals carrying different voltages and terminal elements.FIG. 12 is an overall view of the example of the traction battery 240 or 280 configured according to the invention in one of the embodiments of the "DC variant" or the "DC variant with contactors" in the ready-to-use manufacturing state after assembly of the upper housing shell 142 or 182 configured according to FIG. 2, 3 or 5 to 8 with the lower housing shell 101 configured according to FIG. 9 or 10. The traction battery 240 or 280 is equipped with traction plug 216, charging plug 241 and on-board power supply plug 221. For easy access to the internal mounting interface in the mounting direction even after the upper housing shell 142 or 182 has been assembled, in particular glued, with the lower housing shell, the hood 103 of the upper housing shell 142 or 182 has on its end facing the engine compartment of the vehicle in the intended installation position in the vehicle on the upper side of this end a mounting opening 111, which is closed in FIG. 12 by a cover 112.FIG. 13 shows, in an enlarged detail of a detail Z marked in FIG. 12, a detailed view of the hood 103 with the traction plug 216, the on-board power supply connector 221 and the mounting opening 111 closed by the cover 112. In this case, the cover 112 is advantageously screwed onto the hood 103 for closing the installation opening using the screws 106 shown in FIG. 9 and provided for fastening the second adapter part 226 to the hood 103, with the result that the screws 106 simultaneously serve for closing the installation opening 111 in the hood 103 arranged above the installation interface 222 in the installation direction. Between an edge region of the hood 103 surrounding the mounting opening 111 and an edge of the cover 112 overlapping this edge region, a sealing layer 113 is also arranged.In summary, the invention proposes a housing of a traction battery of an electrically drivable vehicle. To simplify its production, the housing comprises a housing lower shell for accommodating battery modules of the traction battery, in which a traction battery connection unit is arranged, a housing upper shell having a traction plug with traction line string for connecting the traction plug to traction connections of the traction battery connection unit, optionally an on-board power supply plug with on-board power supply line string for connecting the on-board power supply plug to on-board power supply connections of the traction battery connection unit, optionally a charging plug with charging line string for connecting the charging plug to charging connections of the traction battery connection unit, optionally a switching device for connecting or disconnecting the charging plug and the charging line string, optionally a measurement line string for transmitting a measurement value of a charging voltage at the charging plug, to the switching device, a mounting interface for establishing all electrical connections between the traction battery connection unit and the upper housing shell. Further, a method for mounting this housing is proposed.List of reference characters100 Housing of 200 101 housing lower shell of 200, 240, 280 102 housing upper shell of 200 103 hood of 102, 142, 182 104 fastening elements for 212, 213 to 102, 142, 182 105 trough of 101 106 screws for fastening 226 to 102, 142, 182 107 first guides in 225, 226 for 108 second guides in 225, 226 for 109 third guides in 225, 226 for 110 fourth guides in 225, 226 for 111 mounting opening in 103 112 cover to 111 113 sealing position between 111 and 112 140 housing of 240 142 housing upper shell of 240 144 fastening elements for 242 with 243, 244 180 housing of 280 182 housing upper shell of 280 184 fastening elements for 284, 285 200 block diagram of traction battery, "AC variant" 201 battery modules of 200 202 positive pole of 201 203 negative pole of 201 204 traction battery connection unit of 200, 240, 280 205 battery measuring lines of 201 to 204 206 first traction connection / first charging connection 206 aof 204 207 second traction connection / second charging connection 207 aof 204 208 on-board power system connections of 204 209 measuring connections of 204 210 control line connections of 204 211 traction line 212 first traction conductor of 211 213 second traction conductor of 211 214 first connection element of 212 for connection to 206 215 second connection element of 213 for connection to 207 216 traction plug to 211 217 first contact of 216 connected to 212 218 second contact of 216 connected to 213 219 on-board power system line train, multipolar 220 third connection element of 219, multipolar, for connection to 208 221 on-board power supply connector to 219, multipolar 222 mounting interface to 200, 240, 280 223 Fourth connection element to 285 for connection to 209 224 Fifth connection element to 284 for connection to 210 225 First adapter part to 222 to 204 226 Second adapter part to 222 to 102, 142, 182 240 Block diagram of traction battery, "DC variant" 241 Charging connector 242 Charging line section 243 First charging conductor to 242 244 Second charging conductor to 242 245 First contact to 241 connected to 243 246 Second contact to 241 connected to 244 247 Pilot line to 222 to 241 280 Block diagram of traction battery, "DC variant with contactors" 281 switching device 282 first DC contactor of 281 283 second DC contactor of 281 284 control lines of 210 and 224 respectively to 282, 283 285 measurement line string of 209 and 223 respectively to 245, 246 of 241 Z section from FIG. 12

Claims

Housing (100; 140; 180) of a traction battery (200; 240; 280) of an electrically drivable vehicle, comprising • a housing lower shell (101), which is in particular of trough-like design and is designed to accommodate at least one battery module (201) of the traction battery (200; 240; 280) and ◯ in which a traction battery connection unit (204) is arranged, • a housing upper shell (102; 142; 182), which is in particular of hood-like design, at least having ◯ a traction plug (216) and a traction line section (211) for connecting the traction plug (216) to traction connections (206, 207) of the traction battery connection unit (204), ◯ optionally an on-board power supply connector (221) and an on-board power supply line section (219) for connecting the on-board power supply connector (221) to on-board power supply connections (208) of the traction battery connection unit (204), ◯ optionally a charging connector (241) and a charging line section (242) for connecting the charging connector (241) to charging connections (206a, 207a) of the traction battery connection unit (204), ◯ to the charging connector (241), optionally a switching device (281) for connecting or disconnecting the charging connector (241) and the charging line section (242), ◯ to the switching device (281), optionally a measurement line section (285) at least for transmitting a measurement value of a charging voltage at the charging connector (241), • an assembly interface (222), in which all electrical connections are produced between the terminals of the traction battery connection unit (204) and the upper housing shell (102; 142; 182), wherein the mounting interface (222) comprises: • a first adapter part (225) which is connected to the traction battery connection unit (204) and / or is guided in the traction battery connection unit (204) and in which the traction terminals (206, 207), the charging terminals (206a, 207a) and optionally the on-board power supply terminals (208) and / or the measuring terminals (209) are contained and / or guided, and • a second adapter part (226) which is connected to the upper housing shell (102; 142; 182) and / or is guided in the upper housing shell (102; 142; 182), in the connecting elements (214, 215; 220; 223) of the traction line section (211), of the charging line section (242) and optionally of the on-board power supply line section (219) and / or of the measuring line section (285) are contained and / or guided, wherein the first and the second adapter part (225, 226) are joined together in a positive fit in an assembly direction and engage one inside the other, in which housing upper shell (102; 142; 182) and housing lower shell (101) are also joined together to form the housing (100; 140; 180).Housing (100; 140; 180) according to Claim 1, characterized in that at least some of the traction connections (206, 207), the charging connections (206a, 207a) and the on-board power supply connections (208) and / or the measurement connections (209) are connected on the one hand to associated connection elements (214, 215; 220; 223) of the traction line section (211), of the charging line section (242) and optionally of the on-board power supply line section (219) and / or of the measurement line section (285) on the other hand in a pluggable and / or screwable manner.Housing (100; 140; 180) according to Claim 1 or 2, characterized in that all traction connections (206, 207) and all charging connections (206a, 207a) and optionally all on-board power supply connections (208) and / or all measuring connections (209) are connected on the one hand to the associated connection elements (214, 215; 220; 223) of the traction line section (211) and of the charging line section (242) and optionally of the on-board power supply line section (219) and / or of the measuring line section (285) on the other hand in a pluggable manner.Housing (100; 140; 180) according to one of Claims 1 to 3, characterized in that • at least one, preferably one, mounting opening (111) is arranged in the upper housing shell (102; 142; 182), preferably on an upper side of the upper housing shell (102; 142; 182), and • the mounting interface (222) is arranged on an inner side of the upper housing shell (102; 142; 182) in the region of the at least one, preferably one, mounting opening (111) in the upper housing shell (102; 142; 182) such that it can be accessed from an outer side of the housing (100; 140; 180) in the mounting direction in which the upper housing shell (102; 142; 182) and the lower housing shell (101) are brought together to form the housing (100; 140; 180).Upper housing shell (102; 142; 182) for a housing (100; 140; 180) according to one or more of Claims 1 to 4.Traction battery (200; 240; 280), characterized by • a housing (100; 140; 180) according to one of Claims 1 to 4, • and at least one battery module (201).Electrically drivable vehicle, characterized bya traction battery (200; 240; 280) according to Claim 6.Method for mounting a housing (100; 140; 180) of a traction battery (200; 240; 280) of an electrically drivable vehicle, characterized the following method steps: • an upper housing shell (102; 142; 182) and a lower housing shell (101) are brought together in an assembly direction and connected to one another in a form-fitting manner to form the housing (100; 140; 180), wherein ◯ a first adapter part (225) connected to a traction battery connection unit (204) arranged in the lower housing shell (101) of the housing (100; 140; 180) and / or guided in the traction battery connection unit (204), in which adapter part traction connections (206, 207) and charging connections (206a, 207a) and optionally on-board power supply system connections (208) and / or measuring connections (209) are contained and / or guided, and ◯ a first adapter part (225) connected to the upper housing shell (102; 142; 182) of the housing (100; 140; 180) and / or guided in the upper housing shell (102; 142; 182), in which connection elements (214, 215; 220; 223) of a traction line section (211) and of a charging line section (242) and optionally of an on-board power supply line section (219) and / or of a measuring line section (285) are contained and / or guided, are joined positively into one another in the same mounting direction in which the upper housing shell (102; 142; 182) and the lower housing shell (101) are joined together to form the housing (100; 140; 180); • During and / or after the interlocking merging and thereby mechanically connecting the first and second adapter parts (225, 226) to one another, ◯ the traction connections (206, 207) and the charging connections (206a, 207a) and optionally on-board power supply connections (208) and / or the measuring connections (209) and ◯ the connection elements (214, 215; 220; 223) of the traction line section (211) and the charging line section (242) and optionally the on-board power supply line section (219) and / or the measuring line section (285) are guided through a mounting opening (111) in the upper housing shell (102; 142; 182) in the same mounting direction, in the upper housing shell (102; 142; 182) and lower housing shell (101) to form the housing (100; 140; 180), the traction connections (206, 207) and the charging connections (206a, 207a) and optionally the on-board power supply connections (208) and / or the measuring connections (209), on the one hand, and the connection elements (214, 215; 220; 223) of the traction line section (211) and of the charging line section (242) and optionally of the on-board power supply line section (219) and / or of the measuring line section (285), on the other hand, are optionally exclusively plugged in the same mounting direction in which the upper housing shell (102; 142; 182) and the lower housing shell (101) are joined to form the housing (100; 140; 180) and are thereby electrically conductively connected to one another.

Images