motor vehicle with a battery

Abstract

Motor vehicle (40) with a battery (1) comprising a housing (2) with battery cells (8-10) and a temperature control / cooling system, characterized in that the supply lines and / or discharge lines of the temperature control / cooling system are designed as fluid-carrying baffle tubes (38, 39), wherein the fluid-carrying baffle tubes (38, 39) are made of a relatively stiff metallic material, wherein the battery (1) is arranged in a passenger footwell or a battery (1) is arranged in a passenger footwell and in a driver footwell of the motor vehicle (40), wherein the battery comprises a foot body (5) which is arranged in a footwell of the motor vehicle (40) and is angled from a base body (4) of the battery (1) which is arranged in a floor area of ​​the motor vehicle (40).

Description

[0001] The invention relates to a motor vehicle with a battery comprising a housing with battery cells and a temperature control / cooling system. The invention further relates to a battery for such a motor vehicle.

[0002] German patent application DE 10 2005 038 153 A1 discloses a vehicle with an electrical energy storage device designed to be flat and thus space-saving, allowing it to be mounted on the vehicle floor or integrated into the vehicle's floor structure. German patent application DE 10 2008 027 894 A1 discloses a crash-energy-absorbing arrangement in a motor vehicle with a subframe and a nearby galvanic cell, positioned in front of the subframe in the direction of the crash and comprising at least one deformation element for absorbing crash energy between the galvanic cell and the subframe.

[0003] The object of the invention is to further improve the crash behavior of a motor vehicle with a battery comprising a housing with battery cells and a temperature control / cooling system.

[0004] In a motor vehicle with a battery comprising a housing containing battery cells and a temperature control / cooling system, the problem is solved by designing the supply and / or return lines of the temperature control / cooling system as fluid-carrying baffle tubes. This combines two functions in a simple manner. By designing the supply and / or return lines of the temperature control / cooling system as fluid-carrying baffle tubes, the stability of the battery housing can be increased without requiring additional components. The baffle tubes are preferably oriented in the direction of the force exerted on the motor vehicle in the battery area during an accident.The motor vehicle is preferably a hybrid or electric vehicle with an electric motor that can be used alone or together with another drive motor, such as an internal combustion engine, to propel the vehicle. A battery is defined as an electrical energy storage device, such as the one disclosed, for example, in German patent application DE 10 2005 038 153 A1. The battery is preferably a traction battery. A traction battery, also known as a drive battery, is installed as an energy source in vehicles that are, at least partially, electrically powered. In order to provide a sufficient amount of energy, the battery is designed as a high-voltage battery capable of delivering a high voltage of, for example, 400 volts.

[0005] A preferred embodiment of the motor vehicle is characterized in that the fluid-carrying impact tubes are arranged in a transverse direction to the vehicle. This reliably prevents undesirable deformation of the battery in the event of a so-called pole crash, when a lateral force is exerted on the motor vehicle.

[0006] Another preferred embodiment of the motor vehicle is characterized in that the fluid-carrying baffle tubes are made of a relatively stiff metallic material. The material is preferably steel and / or titanium, or a steel alloy with titanium, or a titanium alloy.

[0007] Another preferred embodiment of the motor vehicle is characterized in that the fluid-carrying baffle tubes are connected to plate-like or tube-like elements for temperature control / cooling. The battery cells are preferably arranged between two plate-like or tube-like elements for temperature control / cooling. The battery cells, preferably designed as cylindrical cells, lie flat against the plate-like or tube-like elements for temperature control / cooling with their end faces. The battery cells are preferably arranged in rows between two plate-like or tube-like elements for temperature control / cooling. A medium for temperature control / cooling is supplied to and removed from the plate-like or tube-like elements via the baffle tubes. The fluid-carrying baffle tubes can be detachably connected to the plate-like or tube-like elements, in particular by a positive connection, for example by screwing.However, the connection between the impact tubes and the plate-like or tube-like elements can also be permanent, in particular by material bonding, for example by welding, soldering or gluing.

[0008] Another preferred embodiment of the motor vehicle is characterized in that the plate-like or tube-like elements for temperature control / cooling are arranged in a longitudinal direction of the vehicle. The longitudinal direction of the vehicle is also referred to as the X-direction. Similarly, the transverse direction of the vehicle is referred to as the Y-direction. The plate-like or tube-like elements are thus arranged perpendicular to the baffle tubes.

[0009] Another preferred embodiment of the motor vehicle is characterized in that the plate-like or tube-like elements for temperature control / cooling extend between two baffle tubes. The plate-like or tube-like elements are preferably each connected to a baffle tube at their free ends.

[0010] Another preferred embodiment of the motor vehicle is characterized in that the plate-like or tube-like elements for temperature control / cooling are arranged between two rows of battery cells. This ensures sufficient cooling of the battery cells in a simple manner. A plate-like or tube-like element for temperature control / cooling is preferably assigned to the outer rows of battery cells, which rests against the outwardly facing end faces of the battery cells.

[0011] Another preferred embodiment of the motor vehicle is characterized in that the battery cells are designed as cylindrical cells, each with a longitudinal axis arranged in a transverse direction of the vehicle. Cylindrical cells are defined as battery cells that have a circular cross-section. Depending on the design, the circular cross-section may have a shape that deviates from an ideal circle. The cylindrical cells essentially have the shape of straight circular cylinders whose longitudinal axes extend in the transverse direction of the vehicle.

[0012] Another preferred embodiment of the motor vehicle is characterized in that the battery is arranged in a passenger footwell, or that one battery is arranged in a passenger footwell and another in a driver's footwell of the motor vehicle. The batteries may optionally extend under a passenger seat or driver's seat, respectively.

[0013] Another preferred embodiment of the motor vehicle is characterized in that the battery comprises a base body, which is arranged in a footwell of the motor vehicle and angled away from a base body of the battery, which is arranged in a floor area of ​​the motor vehicle. The arrangement of the battery base body utilizes previously unused installation space for the battery. Furthermore, by arranging the base body in the footwell of the motor vehicle, connection paths to components in the front of the motor vehicle, such as an air conditioning unit or an electric drive motor, are shortened. This improves the efficiency of the temperature control / cooling. Additionally, ohmic line losses are reduced. The baffle tubes can be arranged only in the base body and, for example, define its boundaries at two ends. However, the baffle tubes can also be arranged in both the base body and the base body.Preferably, two impact tubes are arranged in the base body. However, more than two impact tubes can also be arranged in the base body.

[0014] The foot body is preferably angled at an obtuse angle to the base body. The foot body is preferably angled at an angle of approximately 135 degrees to the base body.

[0015] Another preferred embodiment of the motor vehicle is characterized in that the foot body includes a receiving area for additional components and / or connection options. These additional components include, for example, electrical components such as contactors, fuses, and resistors. Furthermore, a circuit board for a battery management system, for example, can be arranged in the receiving area of ​​the foot body. The additional components can also include elements for temperature control / cooling of the battery cells. The connection options include electrical connections and / or fluid connections for temperature control / cooling.

[0016] Another preferred embodiment of the motor vehicle is characterized in that the foot body comprises a cuboid section containing battery cells. The cuboid section is preferably arranged in a front footwell of the motor vehicle. The cuboid section of the foot body separates the front footwell from the engine compartment.

[0017] Another preferred embodiment of the motor vehicle is characterized in that the foot body comprises a chamfered section for receiving additional components and / or connections. The chamfered section essentially has the shape of a right-angled triangle, one leg of which abuts the cuboid section of the foot body. The other leg of the right-angled triangle abuts the base body. One hypotenuse of the right-angled triangle is angled obliquely outwards.

[0018] Another preferred embodiment of the motor vehicle is characterized in that the battery is arranged in a passenger footwell, or that one battery is arranged in a passenger footwell and another in a driver's footwell of the motor vehicle. The batteries may optionally extend under a passenger seat or driver's seat, respectively.

[0019] The invention further relates to a battery for a previously described motor vehicle. According to a further aspect of the invention, the battery's design according to the invention improves the crash behavior, particularly in the event of a side impact, of a motor vehicle in which the battery according to the invention is installed.

[0020] Further advantages, features, and details of the invention will become apparent from the following description, in which an exemplary embodiment is described in detail with reference to the drawing. The drawing shows:

[0021] Fig. 1 a perspective view of a battery according to the invention from an oblique angle from behind;

[0022] Fig. 2 a perspective view of the battery made of Fig. 1. diagonally from the front and

[0023] Fig. 3. The side view of a motor vehicle, into which a battery, as found in the Fig. 1 and Fig. 2 is shown, it is built in.

[0024] In the Fig. 1 and Fig. 2 is a battery 1 with a case 2 Shown from different perspectives. The battery 1 includes a basic body 4 , which essentially has the shape of a cuboid. A foot body 5 is at an obtuse angle of approximately 135 degrees to the base body 4 angled.

[0025] The basic body 4 and the foot body 5Each comprises a multitude of battery cells 8 , 9 , 10 The battery cells 8 , 9 , 10 are designed as round cells and essentially have the shape of straight circular cylinders arranged in rows 11 , 12 , 14 are arranged.

[0026] The basic body 4 comprises a total of six rows 11 , 12 each with approximately twenty battery cells. The battery cells 8 of the base body 4 are arranged in a single layer.

[0027] The foot body 5 comprises a total of three rows of battery cells 9 , 10 , which are arranged in multiple layers. The foot body 5 includes in addition to the three rows 14 with battery cells 9 , 10 additionally a recording area 18 for additional components 21 , 22 , 23 , 24 .

[0028] The component 21 This is a circuit board for a battery management system. The battery management system is used to monitor and regulate the battery's state of charge and / or temperature. 1 . Regarding the component 22 This could be, for example, an electrical fuse. Regarding the component... 23 These are, for example, electrical contactors. Regarding the component... 24 For example, it could be an electrical resistance.

[0029] The three rows 14 arranged battery cells 9 , 10 of the foot body 5 form a cuboid section 26 The recording area 18 for the additional components 21 until 24 represents a beveled section 28 which essentially has the shape of a right-angled triangle.

[0030] In Fig. 2 shows that the beveled section 28 with the recording area 18 for the additional components 21 until 24 Furthermore, connection options with connectors 31 , 32 , 33 features. Regarding the connections 31 These are, for example, communication connections. The connection 32 This could be, for example, a low-voltage connection. Regarding the connection... 33 For example, it could be a high-voltage connection.

[0031] For cooling the battery cells 8 until 10 are both in the basic body 4 as well as in the foot body 5 Temperature control / cooling equipment 35 , 36 planned. The temperature control / cooling equipment 35 , 36 are preferably designed as cooling plates or cooling tubes, each positioned between two rows 11 , 12are arranged with battery cells. The lateral boundary of the base body 4 and the foot body 5 can also be represented by temperature control / cooling devices.

[0032] The temperature control / cooling equipment 35 , 36 preferably extend through both the base body 4 as well as through the foot body 5 . Via appropriate connections, which are also located in the recording area, for example 18 The temperature control / cooling devices can be arranged in various ways. 35 supplied with a suitable temperature control / cooling medium.

[0033] In Fig. 3 is a motor vehicle 40 shown in side view. Regarding the motor vehicle 40 It is a sports car with a hybrid drive. The hybrid drive comprises a combustion engine and an electric motor, powered by at least one battery. 1 is supplied with electrical energy.

[0034] The battery 1 is near a front axle 41 in a front footwell 42 of the motor vehicle 40 built-in. The main body 4 the battery 1 is arranged horizontally in a floor area in a plane that is parallel to the underbody of the motor vehicle 40 extends. The basic body 4 the battery 1 is at an angle of approximately 135 degrees to the base body 4 arranged and limits the front footwell 42 .

[0035] According to a key aspect of the invention, the base body 4 the battery 1 two or more impact tubes 38 , 39 arranged between which the temperature control / cooling devices, designed as plate-like or tube-like elements, are located 35 extend.

[0036] The impact tubes 38 , 39 limit the case2 the battery 1 at the rear and front ends of the base body, viewed in the longitudinal direction of the vehicle 4 The impact tubes are involved. 38 , 39 in the transverse direction of the vehicle, and perpendicular to the temperature control / cooling devices 35 arranged.

[0037] On at least one of the impact tubes 38 , 39 Connections for supplying or discharging cooling / temperature control medium may be provided (not shown). However, the connections for the temperature control / cooling medium may also be located on the cooling / temperature control units themselves. 35 , 36 be planned. QUOTES INCLUDED IN THE DESCRIPTION

[0038] 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

[0039] DE 102005038153 A1 [0002, 0004] DE 102008027894 A1

[0002]

Claims

[1] Motor vehicle with a battery ( 1 ), which a housing ( 2 ) with battery cells ( 8 – 10 ) and temperature control / cooling, characterized , that supply lines and / or discharge lines of the temperature control / cooling as fluid-carrying impingement tubes ( 38 , 39 ) are executed. [2] Motor vehicle according to claim 1, characterized in that the fluid-carrying impact tubes ( 38 , 39 ) are arranged in a vehicle width direction. [3] Motor vehicle according to one of the preceding claims, characterized in that the fluid-carrying impact tubes ( 38 , 39 ) are formed from a relatively stiff metallic material. [4] Motor vehicle according to one of the preceding claims, characterized in that the fluid-carrying impact tubes ( 38 , 39 ) with plate-like or tubular elements ( 35 , 36 ) are connected for temperature control / cooling. [5] Motor vehicle according to claim 4, characterized in that the plate-like or tubular elements ( 35 , 36 ) are arranged for temperature control / cooling in a vehicle longitudinal direction. [6] Motor vehicle according to claim 4 or 5, characterized in that the plate-like or tubular elements ( 35 , 36 ) extend between two impingement tubes for temperature control / cooling. [7] Motor vehicle according to one of claims 4 to 6, characterized in that the plate-like or tubular elements ( 35 , 36 ) for temperature control / cooling between two rows ( 11 , 12 , 14 ) battery cells ( 8 – 10 ) are arranged. [8] Motor vehicle according to one of the preceding claims, characterized in that the battery cells ( 8 – 10 ) are designed as round cells, each with a longitudinal axis which is arranged in a vehicle transverse direction. [9] Motor vehicle according to one of the preceding claims, characterized in that the battery ( 1 ) arranged in a passenger footwell or a battery ( 1 ) in a passenger footwell and in a driver footwell of the motor vehicle ( 40 ) are arranged. [10] Motor vehicle according to one of the preceding claims, characterized in that the battery has a foot body ( 5 ) includes that in a footwell of the motor vehicle ( 40 ) arranged and supported by a body ( 4 ) of the battery ( 1 ) is angled, which is in a floor area of ​​the motor vehicle ( 40 ) is arranged. [11] Battery for a motor vehicle according to any one of the preceding claims.

Images