Vehicle with an electric energy storage system

Abstract

The invention relates to a vehicle with an electrical energy storage device (2) comprising a housing (1) with a housing cover (1.2) and a receiving tray (1.1) in which a plurality of electrically interconnected individual cells are arranged. According to the invention, a stiffening element (3) extending between the individual cells and designed as a temperature control element (4) is arranged in the receiving tray (1.1). This stiffening element is designed as a hollow profile and is through which, or can be permeated by, a temperature control medium for tempering the individual cells. The temperature control element (4) comprises two longitudinal struts (3) extending in the direction of a longitudinal axis of the receiving tray (1.1) and permeable by the temperature control medium.1), which are fluidically coupled to each other at one end, and are coupled at an opposite free end (E) to a conveying unit and / or a temperature control unit of a cooling circuit of the vehicle, and comprise two transverse struts (3.2) extending in the direction of a transverse axis of the receiving shell (1.1), through which the temperature control medium can flow, and which are fluidically coupled to each other at their two ends.

Description

[0001] The invention relates to a vehicle with an electrical energy storage device, which has a housing with a housing cover and a receiving tray in which a plurality of electrically interconnected individual cells are arranged.

[0002] From DE 10 2012 008 633 A1, a battery module, a battery system, a motor vehicle with a battery system, and a method for manufacturing a battery system are known. The battery module has a plurality of battery cells and a deformation element, the latter being designed to absorb mechanical energy acting on the battery module from the outside by means of plastic deformation of its shape.

[0003] The problem is solved according to the invention by a vehicle which has the features specified in claim 1.

[0004] Advantageous embodiments of the invention are the subject of the dependent claims.

[0005] A vehicle comprises an electrical energy storage device, which has a housing with a housing cover and a receiving tray in which a plurality of electrically interconnected individual cells are arranged. According to the invention, it is provided that - in the receiving tray, a stiffening element designed as a temperature control element is arranged between individual cells, which is designed as a hollow profile and is through which, or can be through which, a temperature control medium flows to temper the individual cells, wherein - the temperature control element comprises two longitudinal struts extending in the direction of a longitudinal axis of the receiving shell, through which the temperature control medium can flow, which are fluidically coupled to each other at one end and coupled at an opposite end to a conveying unit and / or a temperature control unit of a cooling circuit of the vehicle, and two transverse struts extending in the direction of a transverse axis of the receiving shell, through which the temperature control medium can flow, which are fluidically coupled to each other at their two ends.

[0006] Because the stiffening element is designed as a flow-through or flow-through temperature control element, the electrical energy storage device is stiffened and stabilized, and the individual cells can be efficiently temperature controlled, in particular cooled, by means of the temperature control element arranged within the receiving shell.

[0007] Since the stiffening element, designed as a temperature control element, is located within the housing of the electrical energy storage device, the number of individual cells that can be arranged within the housing is reduced. This loss can be compensated for by increasing the housing's installation height, thereby allowing the individual cells to be made taller.

[0008] Exemplary embodiments of the invention are explained in more detail below with reference to drawings.

[0009] This shows: Fig. 1. Schematic: A perspective view of an exploded view of a housing for an electrical energy storage device for a vehicle with a stiffening element designed as a temperature control element. Fig. 2 schematically a perspective view of the housing of the electrical energy storage device in the assembled state, Fig. 3. Schematic view of a perspective view of a vehicle body shell before the installation of the electrical energy storage system and Fig. 4 schematically a top view of the vehicle body shell with mounted electrical energy storage.

[0010] Corresponding parts are marked with the same reference symbols in all figures.

[0011] Fig. Figure 1 shows a perspective view of an exploded view of a housing 1 of an electrical energy storage device 2 with a stiffening element 3, which is designed as a temperature control element 4 and is integrated into a cooling circuit of the vehicle. Fig. Figure 2 shows a perspective view of the housing 1 in its assembled state.

[0012] The electrical energy storage device 2 is a traction battery of an electric vehicle, a hybrid vehicle, or a fuel cell-powered vehicle. Such an electrical energy storage device 2 has a housing 1, which comprises a receiving tray 1.1 and a housing cover 1.2. A plurality of electrically interconnected individual cells, not shown in detail, are arranged in the housing 1, particularly in the receiving tray 1.1.

[0013] It is generally known that such an electrical energy storage device 2 is arranged and attached in the area of ​​a vehicle floor of a vehicle, the vehicle floor itself being a component of the housing 1.

[0014] To protect the electrical energy storage device 2, located in the area of ​​the vehicle floor, from deformation in the event of a vehicle collision, thus reducing the risk of damage to the individual cells to such an extent that thermal runaway and therefore a potential fire hazard can be largely prevented, the electrical energy storage device 2 is designed and arranged on a vehicle as described below. The stiffening element 3 forms a temperature control element 4 of a vehicle cooling circuit, by means of which the individual cells arranged in the housing 1 can be temperature controlled, in particular cooled or heated.

[0015] As the Fig. Figure 2 shows that a stiffening element 3 is arranged in the receiving shell 1.1. The stiffening element 3, and thus also the temperature control element 4, comprises two longitudinal struts 3.1 and two transverse struts 3.2, wherein the longitudinal struts 3.1 and the transverse struts 3.2 are fluidically connected to each other, and the stiffening element 3 is designed as a hollow profile to form the temperature control element 4.

[0016] The cross members 3.2 are arranged one behind the other in the direction of travel x of the vehicle, each cross member 3.2 having a flow channel S which is fluidically connected to each other at one end of the cross members 3.2. The two cross members 3.2 are thus connected at their ends and, in a top view, have an oval shape as a fluidic unit. The flow channels S of the two cross members 3.2 are additionally fluidically connected to flow channels S of the two longitudinal members 3.1. In summary, the stiffening element 3, designed as a temperature control element 4, has a flow channel S through which a temperature control medium, for example a water-glycol mixture, flows or can flow.

[0017] In particular, the stiffening element 3 and thus the temperature control element 4, especially for stiffening the housing 1 of the electrical energy storage device 2, is made of a comparatively robust and stiff material, for example metal and / or plastic and / or a fiber-reinforced plastic.

[0018] The longitudinal struts 3.1 each have a first section in which they run parallel to each other at a predetermined distance. In a second section adjacent to the first, the longitudinal struts 3.1 converge, and in a third section, they run parallel to each other again at a further distance, which is less than the predetermined distance between the longitudinal struts 3.1 in the first section. If the electrical energy storage device 2 is mounted on a vehicle, the longitudinal struts 3.1 are arranged with their first section in the direction of travel x, with the ends of the longitudinal struts 3.1 opposite these ends being connected to each other in an arc-shaped and fluidic manner.

[0019] The cross braces 3.2 of the stiffening element 3 and thus of the temperature control element 4 run parallel to each other, with one cross brace 3.2 being arranged centrally with respect to a longitudinal axis of the receiving shell 1.1 and another cross brace 3.2 being arranged in front of the centrally arranged cross brace 3.2 with respect to the direction of travel x.

[0020] In the connection area of ​​the two longitudinal struts 3.1 and in the respective connection area of ​​the two transverse struts 3.2 and / or on an outer side of the receiving shell 1.1, at least one flange-type fastening point B is arranged and / or formed. According to the Fig. In the embodiment shown in Figure 1, the fastening points B are arranged or formed on the stiffening element 3, which is designed as a temperature control element 4.

[0021] Both the longitudinal struts 3.1 and the transverse struts 3.2 are of such a length that the attachment points B of the longitudinal struts 3.1 and the transverse struts 3.2 are located outside the housing 1, in particular the receiving shell 1.1. For this purpose, the receiving shell 1.1 has a number of recesses A corresponding to the number of longitudinal struts 3.1 and the transverse struts 3.2, which are arranged in an edge region of the receiving shell 1.1. The attachment points B of the longitudinal struts 3.1 and the transverse struts 3.2 project through these recesses A and are thus positioned outside the housing 1. For example, the attachment points B are fixed to the edge region of the receiving shell 1.1 in the respective recess A by means of a material-fit, form-fit, and / or force-fit connection.

[0022] A conveying unit and / or a temperature control unit of a vehicle cooling circuit is arranged at the mounting points B of the two longitudinal struts 3.1, which are spaced apart from each other in the first section and are arranged in the direction of travel x. The flow channels S of the two longitudinal struts 3.1 are thus fluidically connected to the conveying unit and / or the temperature control unit, with the stiffening element 3, designed as a temperature control element 4, being integrated into a vehicle cooling circuit.

[0023] The temperature control unit, as part of the vehicle's cooling circuit, regulates the temperature of the temperature control medium. This medium is then supplied, particularly for cooling the individual cells, via the fluidic connection between the pump unit and / or the temperature control unit, to the flow channels S of the longitudinal struts 3.1 and, via these, to the flow channels S of the transverse struts 3.2. A free end E of one longitudinal strut 3.1 forms an inlet opening, and an opening of a free end E of another longitudinal strut 3.1 forms an outlet opening for the temperature control medium.

[0024] The individual cells arranged in the receiving unit 1.1 of the housing 1 are thermally coupled by means of the temperature control medium flowing in the flow channels S, whereby the temperature control medium dissipates the waste heat generated during the operation of the individual cells, i.e., during charging and discharging. Due to the temperature control of the individual cells, it is possible to operate them within their optimized operating temperature range.

[0025] The flange-shaped mounting points B are specifically designed for attaching the electrical energy storage device 2 to a vehicle body shell 5, as shown in the Fig. 3 and Fig. 4 is shown.

[0026] The vehicle body 5 has a continuous recess AN within which the electrical energy storage device 2 is arranged, so that the electrical energy storage device 2 forms part of the vehicle floor and thus of the vehicle body 5.

[0027] In particular, the electrical energy storage device 2 is connected to the vehicle body 5 by means of the mounting points B of the stiffening element 3 and thus of the temperature control element 4, either materially or form-fit and / or force-fit, so that the electrical energy storage device 2 is firmly and securely held to the vehicle body 5. The stiffening element 3, which also serves as the temperature control element 4, thus increases the stability and rigidity of the electrical energy storage device 2 and also of the vehicle, especially the vehicle floor. The stiffening element 3, designed as the temperature control element 4, forms a structural element of the vehicle body. Since the electrical energy storage device 2, particularly due to the stiffening element 3, increases the stability and rigidity of the vehicle, occupant protection can also be enhanced.

[0028] Because the electrical energy storage device 2 is arranged, at least partially, in the recess AN of the vehicle body shell 5, the housing 1, in particular the receiving shell 1.1, can be made taller, thus allowing the cell housings of the individual cells to be made taller in order to compensate for the reduced number of individual cells resulting from the arrangement of the stiffening element 3, which simultaneously forms the temperature control element 4, in the receiving shell 1.1. For example, the height of the individual cells can be increased by half. This optimizes the use of both the installation space available via the recess AN for arranging the electrical energy storage device 2 and the receiving space of the receiving shell 1.1 made available by the increased height of the housing 1, in particular the receiving shell 1.1. Reference symbol list 1 case 1.1 Receiving tray 1.2 Housing cover 2 electrical energy storage devices 3 stiffening element 3.1 Longitudinal strut 3.2 Cross brace 4 Temperature control element 5 Vehicle body shell A recess AN exception B Mounting point E free end S Flow channel x direction of travel QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] DE 10 2012 008 633 A1

[0002]

Claims

[1] Vehicle with an electrical energy storage device (2) comprising a housing (1) with a housing cover (1.2) and a receiving tray (1.1) in which a plurality of electrically interconnected individual cells are arranged, characterized by , that - in the receiving tray (1.1) a stiffening element (3) extending between individual cells, designed as a temperature control element (4), which is designed as a hollow profile and is through which or can be supplied with a temperature control medium for tempering the individual cells, wherein - the temperature control element (4) comprises two longitudinal struts (3.1) extending in the direction of a longitudinal axis of the receiving shell (1.1), through which the temperature control medium can flow, which are fluidically coupled to each other at one end and are coupled at an opposite free end (E) to a conveying unit and / or a temperature control unit of a cooling circuit of the vehicle, and two transverse struts (3.2) extending in the direction of a transverse axis of the receiving shell (1.1), through which the temperature control medium can flow, which are each fluidically coupled to each other at their two ends. [2] Vehicle according to claim 1, characterized by , that the free ends (E) of the longitudinal struts (3.1) coupled by means of the pump and / or a temperature control unit are arranged in the direction of travel (x) of the vehicle. [3] Vehicle according to claim 1 or 2, characterized by, that flange-shaped attachment points (B) are formed and / or arranged in the area of ​​the fluidic connection of the two longitudinal struts (3.1) and the two transverse struts (3.2). [4] Vehicle according to any of the preceding claims, characterized by , that the stiffening element (3) designed as a temperature control element (4) is made of metal and / or plastic.

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