Electric vehicle having a battery in a floor assembly

Abstract

The invention relates to an electric vehicle (1) having a battery (2) in a floor assembly, wherein the battery (2) is arranged in a battery compartment (4) defined by a plurality of body supports (5, 6, 7, 8) of a body (3), wherein the battery compartment (4) is defined by a protective plate (9) on the bottom surface of the electric vehicle (1). In the electric vehicle, it is proposed that the battery (2) has a connecting element (10, 11) at least on the side pointing toward one of the body supports (7, 8), wherein the body supports (7, 8) have a recess (12, 13) in which the connecting element (10, 11) is arranged.

Description

Technical Field

[0001] The present invention relates to an electric vehicle having a battery in a floor assembly, wherein the battery is arranged in a battery compartment defined by a plurality of body brackets of a vehicle body, wherein the battery compartment is defined by a protective plate on a bottom surface of the electric vehicle. Background Art

[0002] In vehicles that can be driven electrically or partially electrically, a large number of battery cells are interconnected to form a traction battery. In this case, the traction battery that forms the entire battery consists of more than a hundred battery cells, in some cases up to several thousand battery cells. The battery cells of the traction battery are interconnected to form battery modules, and thus to form subgroups, which in most cases each have the same number of battery cells and are interconnected to form a traction battery.

[0003] DE 10 2009 006 990 A1 discloses an electric vehicle with a battery in a floor assembly, wherein the battery is arranged in a battery compartment defined by a plurality of body supports of the vehicle body, wherein the battery compartment is defined by a protective plate on the underside of the electric vehicle. In particular, a traction battery is described, which is arranged in a closed vehicle tunnel. The closed vehicle tunnel has two longitudinal supports, a U-shaped tunnel part and a floor.

[0004] WO 2017 / 075523 A2 describes a traction battery with a battery housing. The traction battery is arranged in a battery compartment defined by a longitudinal support and a transverse support of the motor vehicle.

[0005] US 8567849 B2 discloses a battery in a floor assembly, the battery being arranged in a battery compartment defined by a body frame of a motor vehicle. Summary of the invention

[0006] The object of the present invention is to improve an electric vehicle with a battery in a floor assembly having the following features: the battery is arranged in a battery compartment defined by a plurality of body supports of the vehicle body, wherein the battery compartment is defined on the bottom side of the electric vehicle by a protective plate, so that an advantageous, structural space-optimized connection of the battery integrated in the vehicle body is ensured.

[0007] This object is achieved by an electric vehicle with a battery in a floor assembly having the following features: the battery is arranged in a battery compartment defined by a plurality of body supports of the vehicle body, wherein the battery compartment is defined by a protective plate on the bottom side of the electric vehicle, wherein the battery has a connecting element at least on one side pointing toward one of the body supports, wherein the body support has a recess in which the connecting element is arranged.

[0008] In the electric vehicle, it is proposed that the battery has a connecting element at least on a side pointing toward one of the body supports, wherein the body support has a recess in which the connecting element is arranged.

[0009] The structural space required for the battery connection element is thus formed by the recess in the body support. The battery connection element can have different functions. In this context, the function of an electrical interface and / or the function of a temperature control interface in the sense of cooling or heating are particularly contemplated.

[0010] For example, the connecting element has a high-voltage connection which leads to an electric motor, by means of which the electric vehicle can be driven.

[0011] For example, the connecting element has a high-voltage connection which leads to the battery control unit.

[0012] For example, the connecting element has a high-voltage connection which leads to a charging socket and / or to a device for inductive charging.

[0013] For example, the connecting element has a low-voltage connection which leads to the battery control unit.

[0014] For example, the connecting element has a coolant connection which is used for temperature control of the battery.

[0015] For example, the connecting element has both a coolant connection, which serves to control the temperature of the traction battery, and a current connection.

[0016] Preferably therefore the battery of the electric vehicle is a traction battery.

[0017] The arrangement of the battery in the vehicle body is particularly advantageous in terms of construction when the recess in the vehicle body support or the recesses in the vehicle body support are designed to be open at the bottom. In this case, the battery can be simply inserted into the vehicle body from below via the connecting element or the connecting elements, wherein the corresponding connecting element is inserted into the recess of the vehicle body support which is assigned to the connecting element.

[0018] Preferably, the battery compartment is closed downwardly by a protective plate.

[0019] Advantageously, the battery compartment is surrounded upwards, to the sides and forwards and rearwards by the vehicle body with the vehicle body brackets.The above description relates to conventional directional indications in vehicles, in particular in electric vehicles.

[0020] Preferably, the protection plate is fastened to the vehicle body and to the connecting element.

[0021] In particular, the body has two or more recesses in the region of the body supports, in each of which a connecting element is arranged.

[0022] In particular, the recess is formed in the front body frame in front of the battery and / or in the rear body frame behind the battery.

[0023] Preferably, the respective connecting element, apart from the direct connecting area, is substantially made of plastic or metal, preferably of an aluminum casting.

[0024] Preferably, at least one connecting element and the battery form an assembly unit. The connecting element or elements are pre-connected to the battery and are drawn in from below together with the battery and fastened (in particular screwed) into the vehicle body. It is particularly advantageous if the connecting element or elements are screwed to the vehicle body and the protective plate.

[0025] For protection from electromagnetic radiation, the body, the connecting element or elements and the protective plate preferably form a Faraday cage. For this purpose, the connection point can be designed to be sealed in terms of electromagnetic compatibility, thus in particular with close screwing distances, metal contacts, no larger holes, etc.

[0026] Preferably, the vehicle body, at least one connecting element and the protective plate together seal the battery compartment. This sealing is achieved, for example, with respect to external environmental influences. The sealing can alternatively or additionally be an acoustic seal, so that acoustic auxiliary measures in the interior space in front of or above the battery installation space can be reduced. As a secondary effect, this can additionally save weight, costs and installation space.

[0027] The electric vehicle according to the invention and its developments result in considerable savings in terms of installation space, costs and weight and also enables simple assembly for mass production. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Further features of the invention emerge from the dependent claims, the drawings and the description of the exemplary embodiments shown in the drawings, without the invention being restricted thereto.

[0029] In the attached picture:

[0030] Figure 1 The first embodiment of the electric vehicle is shown in an exploded view, with the vehicle body, the battery with the connecting element, and the protection plate of the electric vehicle being viewed from the oblique rear and oblique bottom.

[0031] Figure 2 Involving basis Figure 1The assembly and illustration of the vehicle body and the connecting element are shown only before the connecting element is introduced into the recess of the transverse support of the vehicle body,

[0032] Figure 3 A second embodiment of an electric vehicle is shown in an exploded view, with the vehicle body, the battery with the connecting element, and the protection plate of the electric vehicle being viewed from the oblique rear and oblique bottom.

[0033] Figure 4 Involving basis Figure 3 The assembly and illustration of the vehicle body and the connecting element are shown only before the connecting element is introduced into the recess of the transverse support of the vehicle body,

[0034] Figure 5 According to Figure 3 and Figure 4 The exemplary embodiment of FIG. 1 shows the transparently illustrated vehicle body with connecting elements and protective plates, viewed obliquely from above and from the front. DETAILED DESCRIPTION

[0035] According to Figure 1 and Figure 2 A first embodiment of the invention shows an electric vehicle 1 having a battery 2 designed as a traction battery in a floor assembly. The battery 2 is thus introduced from below a vehicle body 3 and connected to the latter. The battery 2 is arranged in a battery compartment 4 defined by a plurality of body mounts of the vehicle body 3. Two (with regard to the usual orientation of the electric vehicle 1) longitudinal body mounts 5, 6 on the side and transverse body mounts connecting these longitudinal body mounts, namely a front transverse body mount 7 and a rear transverse body mount 8 are shown. The battery compartment 4 is defined by a protective plate 9 on the underside of the electric vehicle 1 (thus on the side of the electric vehicle 1 that is directed toward the roadway).

[0036] The battery 2 has attachable connecting elements on its sides pointing toward the transverse body supports 7 and 8, namely a front connecting element 10 assigned to the front transverse body support 7 and a rear connecting element 11 assigned to the rear transverse body support 8. The front connecting element 10 has a temperature control connection and a high-voltage connection. The rear connecting element 11 has only a high-voltage connection.

[0037] The front transverse body support 7 has a recess 12 in which the connecting element 10 is arranged. The rear transverse body support 8 has a recess 13 in which the rear connecting element 11 is arranged. The recesses 12 and 13 are designed to be open at the bottom.

[0038] The battery compartment 4 is surrounded by the vehicle body 3 from the top, to the sides, and to the front and to the rear. This is done by means of the longitudinal vehicle frames 5, 6, the transverse vehicle frames 7, 8 and the floor plate 14 of the vehicle body 3. The protective plate 9 has such dimensions that it covers the frame-shaped assembly of the longitudinal vehicle frames 5, 6 and the transverse vehicle frames 7, 8. Thus, the battery compartment 4 is closed at the bottom by the protective plate 9 when the protective plate 9 is connected to these longitudinal vehicle frames and the transverse vehicle frames. The protective plate 9 is fastened both to the longitudinal vehicle frames 5, 6 and the transverse vehicle frames 7, 8 and to the connecting elements 10, 11. The fastening is done by means of a plurality of screws, which penetrate the protective plate 9 and are screwed into the longitudinal vehicle frames 5, 6 and the transverse vehicle frames 7, 8. The means for fastening the battery 2 to the vehicle body 3 are not shown in detail.

[0039] The corresponding connecting element 10 or 11, except for the direct connection area, is generally made of plastic or metal, in particular of aluminum casting. The connecting elements 10, 11 and the battery 2 form an assembly unit. Therefore, the connecting elements 10, 11 are connected to the battery 2 in advance and are received and screwed into the body 3 together with the battery. The connecting elements 10, 11 are screwed to both the body 3 and the protective plate 9. The body 3, the connecting elements 10, 11 and the protective plate 9 form a Faraday cage. For this purpose, the connection points are implemented as sealed in terms of electromagnetic compatibility, so that there are close screwing distances, metal contacts, no larger holes, etc. The body 3, the connecting elements 10, 11 and the protective plate 9 together seal the battery compartment 4 from external environmental influences. In addition, the body 3, the connecting elements 10, 11 and the protective plate 9 together acoustically seal the battery compartment 4, so that acoustic auxiliary measures in the interior space in front of or above the battery compartment 4 can be reduced. Preferably, a circumferential seal 15 is arranged between the protective plate 9 and the longitudinal body supports 5 , 6 and the transverse body supports 7 , 8 .

[0040] according to Figures 3 to 5 The second embodiment and according to Figure 1 and Figure 2 The first embodiment of the invention differs substantially in that the battery 2 is not arranged between the longitudinal body frames of the electric vehicle 1 forming the side skirts, but in a further rearward region of the electric vehicle (adjacent to the rear axle of the electric vehicle) in front of the rear axle. Figure 1 and Figure 2 consistent with the implementation method, according to Figures 3 to 5 The components of the embodiment of the present invention are denoted by the same reference numerals. In this regard, reference is made to the detailed description of the first embodiment with regard to the second embodiment. The seal 15 is arranged circumferentially on the top side of the base plate 14 in the edge region of the base plate.

Claims

1. An electric vehicle (1) having a battery (2) in a floor assembly, wherein the battery (2) is arranged in a battery compartment (4) defined by a plurality of body brackets of a vehicle body (3), wherein the battery compartment (4) is defined by a protective plate (9) on the bottom surface of the electric vehicle (1), characterized in that The battery (2) has a connecting element (10, 11) at least on a side pointing toward one of the body supports, wherein the body support adjacent to the connecting element has a recess (12, 13) in which the connecting element (10, 11) is arranged; The vehicle body bracket comprises a peripheral wall protruding downward, the peripheral wall defines a downward-facing opening leading to the battery compartment (4), the peripheral wall comprises a recessed portion (12, 13) opening downward and penetrating the peripheral wall, and the battery (2) is installed in the battery compartment (4) via the downward-facing opening defined by the peripheral wall; The connecting element (10, 11) has a voltage interface and / or a cooling medium interface and / or a current interface and a cooling medium interface, the connecting element (10, 11) protrudes from the battery (2) and is assembled in the recessed portion (12, 13), and the connecting element (10, 11) is directly fixed to the peripheral wall; The protective plate (9) is mounted on the peripheral wall and covers the battery (2), the protective plate (9) also covers and is directly connected to the connecting element (10, 11), and the battery compartment (4) is closed downward by the protective plate (9); The vehicle body (3), the at least one connecting element (10, 11) and the protective plate (9) together seal the battery compartment (4).

2. The electric vehicle according to claim 1, characterized in that: The battery (2) is a traction battery.

3. The electric vehicle according to claim 1 or 2, characterized in that: The battery compartment (4) is surrounded upward, to the sides, and to the front and rear by the vehicle body (3) having the vehicle body brackets.

4. The electric vehicle according to claim 1 or 2, characterized in that: The connecting element (10, 11) has a high-voltage connection which leads to an electric motor, by means of which the electric vehicle (1) can be driven.

5. The electric vehicle according to claim 1 or 2, characterized in that: The connecting element (10, 11) has a high-voltage connection which leads to a battery control unit.

6. The electric vehicle according to claim 1 or 2, characterized in that: The connecting element (10, 11) has a high-voltage connection which leads to a charging socket and / or to a device for inductive charging.

7. The electric vehicle according to claim 1 or 2, characterized in that: The connecting element (10, 11) has a low-voltage connection which leads to a battery control unit.

8. The electric vehicle according to claim 1 or 2, characterized in that: The connecting element (10) has a cooling medium interface, which is used to control the temperature of the battery (2).

9. The electric vehicle according to claim 1 or 2, characterized in that: The body (3) has two or more recesses (12, 13) in the region of the body supports, in which a connecting element (10, 11) is arranged in each case.

10. The electric vehicle according to claim 1 or 2, characterized in that: The recessed portion (12, 13) is formed in the vehicle body bracket in front of the battery (2), or in the vehicle body bracket behind the battery (2).

11. The electric vehicle according to claim 1 or 2, characterized in that: The recesses (12, 13) are formed in the vehicle body support in front of the battery (2) and in the vehicle body support behind the battery (2).

12. The electric vehicle according to claim 1 or 2, characterized in that: The connecting element (10, 11), except in the direct connecting area, is generally made of plastic or metal.

13. The electric vehicle according to claim 1 or 2, characterized in that: The at least one connecting element (10, 11) and the battery (2) form an assembly unit.

14. The electric vehicle according to claim 1 or 2, characterized in that: The at least one connecting element (10, 11) is screwed to the vehicle body (3) and the protective plate (9).

15. The electric vehicle according to claim 1 or 2, characterized in that: The vehicle body (3), the at least one connecting element (10, 11) and the protective plate (9) form a Faraday cage.

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