Temperature-controllable battery housing and method of manufacturing the same

Abstract

To provide a method for manufacturing a battery housing that reduces the cost of providing fluid lines within a traction battery.SOLUTION: A battery housing (1) for a vehicle traction battery (2) having a plurality of battery cells (9) includes a housing wall (3) made of a plastic material. The battery housing (1) includes at least one fluid line for a temperature control medium in a lower wall (7). The fluid line is at least partially embedded in the bottom (16) of the lower wall (7).SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a battery housing for a vehicle traction battery, the battery housing having a housing wall, the housing wall comprising plastic, and the battery housing having at least one fluid line for a temperature control medium. The present invention further relates to a traction battery having the battery housing and uses of the battery housing or traction battery. Finally, the present invention relates to a method of manufacturing the battery housing. [Background technology]

[0002] The temperature regulation of the traction battery or battery housing is very important for electric vehicles, as it ensures that the battery cells are always kept at the optimum temperature for the traction battery (approximately room temperature). This applies not only to optimal driving operation over the seasons and during temperature changes during travel, but also to the charging process, since the traction battery can become very hot during the charging process, especially during very fast charging processes. Only with strong thermal management of the traction battery can a very fast charging process be achieved.

[0003] From experience, a battery housing is known that comprises an upper and lower housing shell. Both housing shells accommodate a number of battery cells, a number of electrical connection means, and some electronic components. The battery housing further comprises a fluid line guided in a serpentine manner within an aluminum plate. The aluminum plate comprises two aluminum partial plates that are placed on top of each other and fixedly connected to each other, at least one of the partial plates having a serpentine embossment. The embossment of at least one partial plate complements the other partial plate, forming the serpentine fluid line within the aluminum plate.

[0004] At least one, but usually several, aluminum plates, each with at least one fluid line, are attached to the inside of the upper and / or lower housing shells by screws and connected by line connectors to supply lines, in particular plastic collecting pipes. For example, a collecting pipe can serve as supply lines to three aluminum plates in the lower housing shell and another three aluminum plates in the upper housing shell. Another collecting pipe collects the fluid flows heated (or cooled) by the battery cells and supplies the fluid flows to the thermoregulating element, where the thermoregulating fluid can be cooled (or heated) and the cycle can start again. Summary of the Invention [Problem to be solved by the invention]

[0005] However, the cost of providing fluid lines within the traction battery is very high, and therefore the problem underlying the present invention is to reduce this cost. [Means for solving the problem]

[0006] This problem is solved by a battery housing for a vehicle traction battery, the battery housing having a housing wall, the housing wall comprising plastic, the battery housing having at least one fluid line for a temperature control medium, the fluid line being at least partially embedded in the housing wall.

[0007] The present invention is based on the recognition that providing an aluminum plate is cumbersome, and this is particularly relevant for screw fastening. In particular, adhesive fastening has proven to be insufficiently robust—especially due to frequent temperature fluctuations. Furthermore, the present invention is based on the recognition that, for example, snap-lock connections are also too cumbersome for fastening an aluminum plate to a housing shell. It has been found that, for example, by blow molding or thermoforming, fluid structures or fluid lines can be integrated into the housing wall or into the wall itself. The problem underlying the present invention is that this leads to a corresponding reduction in costs.

[0008] Furthermore, it has been found that by embedding the fluid structures or lines in the wall, a strong bond is achieved, which does not require complex clamp, snap-lock or screw connections and exceeds them in terms of durability. Furthermore, the realization underlying the present invention is that the wall allows for efficient temperature control, which is surprising since aluminum plates are much better heat conductors than the prior art.

[0009] However, as another realization of the present invention, the plastic material for the housing wall, due to its wide variety of shapes, has sufficient thermal conductivity to achieve powerful temperature control. In particular, the fluid lines can be located almost directly inside the housing wall, so that the battery cells are in direct or nearly direct contact with the fluid lines. In addition, additives that enable greater thermal conductivity can be applied to the fluid lines or the housing wall. Furthermore, an insulating layer on the outside of the fluid lines can function to allow the cold or hot fluid lines to penetrate particularly deep inside. These numerous possibilities result in reduced costs during the manufacture of the battery housing without compromising the temperature control performance. The problems stated at the beginning are consequently solved by the battery housing according to the present invention.

[0010] The term "traffic battery" preferably refers to a battery for driving an electric motor that can accelerate a vehicle. In particular, the term "traffic battery" does not refer to a battery that only drives a small electric motor, such as an electric motor for a starter or pump. The traction battery is preferably the energy source for the electric motor that accelerates an electric or hybrid vehicle.

[0011] The housing wall is a component of the battery housing, which may comprise other elements besides the housing wall that are not included in the housing wall, such as connecting elements, e.g., screws, or sealing elements such as sealing rings.

[0012] The term "embedded" preferably means that in the cross section of the housing wall, at least 1 / 10, 1 / 8, 1 / 6, 1 / 4, 1 / 3, 1 / 2 or 2 / 3 of the extent of the fluid line in the height or z-direction is surrounded by the material of the housing wall and preferably in contact with this material. Preferably, the material of the housing wall is connected to the fluid line in a snap-fit ​​and / or materially bonded manner. It is highly preferred that the material of the housing wall is materially bonded to the fluid line, in particular by a thermal process.

[0013] The directions are preferably expressed via a Cartesian coordinate system. The x-direction preferably corresponds to the largest dimension of the battery housing or traction battery. The z-direction preferably corresponds to the smallest dimension of the battery housing. The direction perpendicular to the z-direction and the x-direction is expediently the y-direction. In this embodiment, the z-direction corresponds to the height direction of the traction battery installed in the vehicle. Advantageously, the x-direction corresponds to the direction along the vehicle or the direction of travel.

[0014] The placement of the battery cells within the battery housing defines the "inside" and "outside" directions or locations. For example, if one layer of the housing wall is closer to the battery cells than another layer, then the one layer is disposed within the other layer. The terms "inside" and "outside" preferably refer to the entire battery housing, not just a portion of the wall.

[0015] According to a particularly preferred embodiment, the housing wall has an outer layer and an inner layer. The fluid lines are preferably at least partially, preferably completely, embedded in the inner layer over at least one surface area in the z-direction. Advantageously, the fluid lines are embedded only in the inner layer. An adhesive may be present between the fluid lines and the outer layer. Preferably, a fit exists between the inner layer and the fluid lines. Particularly preferably, a material bond exists between the inner layer and the fluid lines. It is preferred that the inner layer surrounds at least 1, 2, 4, 6, 8, 10, 12, or 14 mm of the outer portion of the fluid lines. It is particularly preferred that the housing wall be shaped on its inside so that it can abut the battery cells face-to-face. This allows the fluid lines to reach particularly close to the battery cells, thereby enabling good heat exchange. Another advantageous effect is that the fluid lines are surrounded by the outer layer, thereby ensuring a reasonable stability of the battery housing. This also causes the fluid lines to be sealed with material even inside the housing wall, which results in a particularly secure or stable positioning of the fluid lines.

[0016] It is particularly preferred that the fluid lines and / or the outer layer and / or the inner layer comprise plastic. This achieves particularly low production costs with particularly low energy costs. Furthermore, plastic materials allow for great design freedom. It is highly preferred that the plastic is a thermoplastic plastic. Preferably, the plastic of the housing wall or the inner layer or the fluid lines contains an additive to increase the thermal conductivity of the plastic of the inner layer or the fluid line. The additive preferably comprises conductive carbon black. Advantageously, the layer thickness of the inner layer is at least 1, 1.5, 2, 3, 4, 6, 8, 10, 12, or 14 mm. It is preferred that the layer thickness of the outer layer is at least 2, 3, 4, 6, 8, 10, 12, or 14 mm.

[0017] According to a particularly preferred embodiment, the battery housing or housing wall has at least two walls, in particular two housing shells. Advantageously, the battery housing or housing wall has a lower wall and an upper wall. Advantageously, the lower wall has a side wall. The upper wall can have a side wall. Advantageously, the upper wall has a cover. Advantageously, the lower wall has a bottom. Preferably, a connecting element or connecting elements are connected to the side wall of the lower wall and / or the side wall of the upper wall. Advantageously, the housing wall has only two walls, so that the battery cells can be fully accommodated after the lower wall is connected to the upper wall. It is possible for the upper wall to have no side wall or to have only a cover. Advantageously, the upper and lower walls are reversibly connected to each other or can be connected to each other. Advantageously, the battery housing has a seal. Advantageously, the seal includes a sealing ring. Preferably, the seal or sealing ring is arranged between the lower and upper walls. Preferably, the seal is configured to extend at least partially, and advantageously completely, along the side wall of the lower wall. The sealing ring suitably comprises an elastomer. The seal can have a sealing groove in the upper and / or lower wall, into which the sealing ring is suitably inserted.

[0018] According to a highly preferred embodiment, the fluid line has at least one bend. The at least one bend of the fluid line is preferably at least partially, preferably completely, embedded in the housing wall or inner layer. It is preferred that the fluid line has multiple bends. Particularly preferred, the fluid line extends at least partially in a serpentine manner. It is preferred that the fluid line includes at least one, preferably multiple, linearly extending portions. Advantageously, the at least one linearly extending portion of the fluid line is at least partially, preferably completely, embedded in the housing wall or inner layer. Advantageously, the outer diameter of the fluid line is 40, 30, or 25 mm or less. Preferably, the outer diameter of the fluid line is 8, 10, or 12 mm or more. It is preferred that the inner diameter of the fluid line is 6, 8, or 10 mm or more. Advantageously, the inner diameter is 35, 25, or 20 mm or less.

[0019] Preferably, the first and / or second end of the fluid line protrudes inward from the housing wall. It is expedient for the battery housing to have a first connecting pipe. Preferably, the first connecting pipe connects the first end of the fluid line to a first fluid connection of the battery housing. Advantageously, the battery housing has a second connecting pipe. The second connecting pipe expediently connects the second end of the fluid line to a second fluid connection of the battery housing.

[0020] It is highly preferred that the battery housing or housing wall have at least a first fluid connection and preferably a second fluid connection. The first and / or second fluid connection are preferably configured as plug or socket elements, in particular as plugs or sockets. More preferably, the first and / or second fluid connection are configured to establish a fluid connection and mechanical fixation with connecting pipes and / or piping outside the battery housing solely through the plugging process. The first and / or second fluid connection are expediently components of a quick coupling. The first and / or second fluid connection preferably protrude outward relative to the housing wall. Advantageously, the first fluid connection is coupled to a first opening in the housing wall, in particular in a material-tight manner, and preferably inserted into the first opening. Advantageously, the second fluid connection is coupled to a second opening in the housing wall, in particular in a material-tight manner, and preferably inserted into the second opening.

[0021] It is highly preferred that a first connecting pipe connects a first end of the fluid line to the first fluid connection. Expediently, a second connecting pipe connects a second end of the fluid line to the second fluid connection. Advantageously, the first and / or second fluid connection has an outer plug-in element that protrudes outward relative to the housing wall and / or an inner plug-in element that protrudes inward relative to the housing wall.

[0022] According to a preferred embodiment, the material of the housing wall or the inner and / or outer layer comprises fibers. The fibers preferably comprise glass fibers. Preferably, the fiber content in the material of the inner and / or outer layer is 5, 10, 15 or 20% by weight or more. Advantageously, the material of the inner and / or outer layer comprises a flame retardant. Advantageously, the flame retardant meets at least category V2 of the UL94 standard. Advantageously, the material of the first and / or second layer comprises a polyolefin, in particular polypropylene.

[0023] The traction battery preferably comprises a battery housing and battery cells according to the present invention. Advantageously, the traction battery comprises at least one electrical or electronic component, which may be a controller, a sensor, or an electrical connection.

[0024] The problem stated at the beginning is solved by the use of a battery housing according to the invention for a traction battery or by the use of a traction battery according to the invention in an electric or hybrid vehicle.

[0025] The problem stated at the beginning is solved by a method for manufacturing a battery housing, in particular a battery housing according to the invention, characterized in that a fluid line is inserted into a mold for forming part of the battery housing or a housing wall or wall body, and then material of the housing wall or wall body is introduced into the mold to embed the fluid line in the housing wall or wall body.

[0026] The method for manufacturing the battery housing preferably includes a blow molding process and / or a thermoforming process. Suitably, the outer and / or inner layer of the housing wall or wall body is manufactured by blow molding or thermoforming.

[0027] Advantageously, the fluid lines are then introduced into the mold or housing wall or body or placed inside the outer layer. It is highly preferred that the wall has a bottom or cover and a side wall. Preferably, after inserting or placing the fluid lines inside the outer layer of the wall or housing wall, the inner layer is attached to the inside of the outer layer by blow molding or thermoforming.

[0028] Two embodiments of the invention are described below with reference to several figures. [Brief explanation of the drawings]

[0029] [Figure 1]1 is an exploded view of a traction battery having a battery housing according to the present invention; [Figure 2] Top view of part of the bottom of the wall below the battery housing [Figure 3] Cross-section through part of Figure 2 [Figure 4A] Sequence of process steps for the first process example [Figure 4B] Sequence of process steps for the first process example [Figure 4C] Sequence of process steps for the first example process [Figure 4D] Sequence of process steps for the first process example [Figure 4E] Sequence of process steps for the first process example [Figure 4F] Sequence of process steps for the first process example [Figure 5A] Sequence of process steps for the second example process [Figure 5B] Sequence of process steps for the second example process [Figure 5C] Sequence of process steps for the second example process [Figure 5D] Sequence of process steps for the second example process [Figure 5E] Sequence of process steps for the second example process [Figure 5F] Sequence of process steps for the second example process DETAILED DESCRIPTION OF THE INVENTION

[0030] 1 shows a traction battery 2 of an electric vehicle. The traction battery 2 is advantageously used to provide electrical energy for driving an electric motor, which can accelerate the electric vehicle. The traction battery 2 advantageously comprises a battery housing 1 and a number of battery cells 9. In addition, a number of electrical or electronic components 11 may be arranged in the battery housing 1. These may include, for example, an electronic control unit and sensors, as well as electrical connection means for the battery cells 9.

[0031] The directions are preferably expressed via a Cartesian coordinate system according to FIG. 1. The x-direction preferably points in one direction along the direction of the largest dimension of the battery housing 1 or the traction battery 2. The z-direction preferably corresponds to the direction of the smallest dimension of the battery housing 1. The direction perpendicular to the z-direction and the x-direction is expediently the y-direction. In this embodiment, the z-direction corresponds to the height direction of the traction battery installed in the vehicle. The x-direction preferably corresponds to the longitudinal direction or direction of travel of the vehicle.

[0032] According to FIG. 1 , the battery housing 1 has a housing wall 3 and, advantageously, a plurality of connecting elements 12. The connecting elements 12 are preferably screws. The battery housing 1 or the housing wall 3 preferably has two walls 7, 8. The battery housing 1 or the housing wall 3 is preferably divided into two walls 7, 8 in the z-direction. One of the two walls 7, 8 is preferably the lower wall 7. Advantageously, the other of the two walls 7, 8 is the upper wall 8. The walls 7, 8 are advantageously connected or connectable to one another via the connecting elements 12. The connecting elements 12 preferably comprise screws.

[0033] The battery housing 1 expediently has a seal (see FIG. 1 ), which advantageously comprises a sealing ring 10, which is preferably arranged between a lower wall 7 and an upper wall 8. Preferably, the lower wall 7 and / or the upper wall 8 or the seal comprises a sealing groove into which the sealing ring 10 can be or is inserted.

[0034] Preferably, the lower wall 7 and / or the upper wall 8 according to FIG. 1 are formed as housing shells. The lower wall 7 advantageously has a side wall 15 extending at least partially around the periphery. Preferably, the lower wall 7 has a bottom 16. Expediently, the upper wall 8 has a side wall 13 extending at least partially around the periphery. Preferably, the lower wall 7 has a bottom 16 or the upper wall 8 has a cover 14. The upper wall 8 advantageously constitutes a lid for the lower wall 7. Expediently, the battery cells 9 are arranged between the lower wall 7 and the upper wall 8. Temperature control elements, in particular the fluid lines 4 of the battery housing 1 or the traction battery 2 (see in particular FIGS. 2 and 3), have been omitted from FIG. 1 for clarity.

[0035] 2 shows a plan view of a portion of the bottom 16 of the lower wall 7. In particular, the sidewall 15 of the lower wall 7 is not shown in FIG. 2. In this embodiment, the fluid line 4 is embedded in the bottom 16 of the lower wall 7 and is preferably not easily visible to the naked eye. For this reason, the fluid line 4 is only shown by a dashed line in FIG. 2. The fluid line 4 is preferably formed in a serpentine shape or as a thermostatic serpentine.

[0036] Advantageously, the upper wall 8 has fluid lines (not shown) which are preferably formed in a serpentine shape and which are preferably embedded in the cover 14 of the upper wall 8.

[0037] The dashed-dotted line along the portion shown in Figure 2 defines a cross section through the bottom 16 of the lower wall 7, as shown in Figure 3. Preferably, the housing wall 3 or the lower wall 7 and / or the upper wall 8 comprises an outer layer 5 and an inner layer 6. It is preferred that the fluid line 4 is at least partially, preferably completely, embedded in the inner layer 6 of the lower wall 7 and / or the upper wall 8.

[0038] Expediently, an interface 17 exists between the outer layer 5 and the inner layer 6 of the lower wall 7 or the upper wall 8. The interface 17 of the lower wall 7 or the upper wall 8 is preferably the interface at which the outer layer 5 and the inner layer 6 form a material bond. The material bond in this embodiment is preferably achieved by attaching at least one of the layers, in particular the inner layer 6, to the other layer, in particular the outer layer 5, in a heated state.

[0039] In this embodiment, the fluid lines 4 of the lower wall 7 and / or upper wall 8 have an outer diameter of 18 mm and an inner diameter of 16 mm. The fluid lines 4 of the lower wall 7 and / or upper wall 8 preferably comprise a plastic, in particular a thermoplastic plastic. Advantageously, the fluid lines 4 are manufactured by extrusion. The fluid lines 4 preferably comprise polypropylene.

[0040] It is preferred that the outer layer 5 and / or the inner layer 6 of the lower wall 7 and / or the upper wall 8 comprise polypropylene. Preferably, the outer layer 5 and / or the inner layer 6 of the lower wall 7 and / or the upper wall 8 contain a reinforcing material, more preferably fibre, particularly preferably glass fibre. Advantageously, the proportion of reinforcing material in the outer layer 5 or the inner layer 6 is 25% or more. It is preferred that the outer layer 5 and / or the inner layer 6 contain a flame retardant.

[0041] 4A-4F show a sequence of process steps of a first exemplary manufacturing process for the battery housing 1 or the housing wall 3 or the lower wall 7 or the upper wall 8. Particularly preferably, the manufacturing process of the first embodiment is a blow molding process.

[0042] According to a first embodiment or Fig. 4A, a manufacturing device 18 for manufacturing battery housings preferably has a first die 19a and a second die 19b that are movable relative to each other, preferably toward each other. The direction of movement is advantageously horizontal. The first die 19a and the second die 19b advantageously define a variable cavity 25 therebetween.

[0043] It is preferred that the first blank 21a is introduced into the cavity 25 in an expedient manner by a blank feeder 20. Preferably, the manufacturing device 18 includes a robot 22. The robot 22 is configured to move the blank feeder 20 so that the first blank 21a is introduced into the cavity 25 in an expedient manner. Advantageously, the blank feeder 20 is arranged on the robot 22 or at one end of the robot 22. It is preferred that the manufacturing device 18 has a blowing device 24. The blowing device 24 is preferably configured so that gas under pressure, in particular compressed air, can enter the first blank 21a and expand the heated first blank 21a in an expedient manner.

[0044] In Fig. 4B, the molds 19a and 19b have been moved toward each other relative to Fig. 4A, so that the cavity 25 is closed. The first blank 21a is then expediently expanded until it conforms to the closed cavity 25 or the inner contour of the first and second molds 19a and 19b. Preferably, as soon as the first blank 21a at least partially solidifies upon cooling, a separating device 23 is moved over the expanded and solidified first blank 21a. The separating device 23 advantageously moves between the molds 19a and 19b. This preferably results in two bodies or shells, each having one outer layer 5.

[0045] 4C, the molds 19a and 19b are then preferably moved apart to enlarge the cavity 25. Then, preferably, according to FIGS. 4D and 4E, at least one fluid line 4, preferably one fluid line 4 for each body / shell / mold or outer layer 5, is introduced into the cavity 25. Advantageously, the at least one fluid line 4 is introduced into the cavity 25 by the robot 22. Expediently, the at least one fluid line 4 is arranged inside the outer layer 5. Particularly preferably, one fluid line 4 is arranged inside each of the two layers 5 or shells / bodies. The arrangement of the fluid lines 4 can be assisted by gluing. An adhesive can be arranged between the fluid lines 4 and the shell or outer layer 5. For this purpose, the robot can wet the fluid lines 4 with adhesive before introducing them into the cavity 25.

[0046] Preferably, the manufacturing device 18 or the robot 22 with the blank feeder 20 introduces the second blank 21b into the cavity 25 (see FIG. 4E). Expediently, the two molds 19a and 19b are then moved towards each other to close the cavity 25.

[0047] Advantageously, a blowing device 24 then blows gas under pressure into the second blank 21b, causing the second, appropriately heated blank 21b to expand (see FIG. 4F). Particularly preferably, the second blank 21b has at least one fluid line 4 or two fluid lines 4 embedded therein. Advantageously, after solidification of the second blank 21b, the second blank 21b results in an inner layer 6 in which one or two fluid lines 4 are embedded.

[0048] Thereafter, preferably in this first embodiment, a separating device 23 cuts the coagulated bodies 5, 6, preferably along a cutting direction (not shown here) similar to FIG. 4B. As a result, two walls 7, 8 are obtained. After the separation process by the separating device 23, a lower wall 7 and an upper wall 8 can be obtained. After the separation process by the separating device 23, two lower walls 7 or two upper walls 8 can be obtained.

[0049] A second embodiment for manufacturing a battery housing 1 or housing wall 3 is shown in Figures 5A-5F. The manufacturing apparatus 18 is preferably configured as a thermoforming apparatus and has a first mold 19a and preferably a second mold 19b. However, in this embodiment, the second mold 19b does not shape the product to be manufactured, as will be explained further below.

[0050] The manufacturing apparatus 18 of the second embodiment preferably includes a separation device 23, which may be movable in the height direction. The manufacturing apparatus 18 of the second embodiment preferably includes a robot 22. The robot 22 is preferably configured to introduce the first blank 21a into the cavity 25 between the first mold 19a and the second mold 19b. The difference from the first embodiment is that the first blank 21a of the second embodiment is preferably formed as a rigid plate, and not as a hollow or curved preform.

[0051] Expediently, after the first blank 21a is introduced into the cavity 25, the first and second dies 19a, 19b are moved toward each other, thereby closing the cavity 25. The first and second dies 19a, 19b can be moved toward each other in the height direction. The first die 19a can be positioned below the second die 19b. Expediently, the first blank 21a is clamped between the first and second dies 19a, 19b. Advantageously, a separating device 23 is operated, by which the peripheral edge of the first blank 21a can be cut off.

[0052] Preferably, the manufacturing device 18 or the second mold 19b comprises a blowing device 24. The blowing device 24 preferably has a nozzle for blowing gas under pressure into the cavity 25, thereby creating pressure in the area above the cavity 25. Advantageously, the cavity 25 or the first blank 21a is subjected to the action of heat. Preferably, the action of heat and gas pressure on the first blank 21a causes the first blank 21a to take on the contour of the first mold 19a (see FIG. 5C). Preferably, the deformed first blank 21a conforms to the outer layer 5 of the walls 7, 8.

[0053] Preferably, the moulds 19a, 19b are then moved apart, thereby opening the cavity 25 (see FIG. 5D). Expediently, the robot 22 then introduces the fluid line 4 into the cavity 25, so that the fluid line 4 rests inside the outer layer 5, as shown in FIG. 5D.

[0054] Advantageously, the robot 22 then introduces the second blank 21b into the cavity 25 (see FIG. 5E). The second blank 21b is preferably formed as a rigid plate. The first blank 21a and / or the second blank 21b can be adapted to the dimensions of the first mold 19a, so that a separation device in the mold 19a is not necessarily required.

[0055] Expediently, the molds 19a and 19b are then moved towards each other until the cavity 25 is closed. The second blank 21b is then advantageously subjected to the action of heat. Expediently, the second blank 21b is subjected to the action of pressure by gas under pressure via the blowing device 24, as indicated by the arrows in FIG. 5F. As a result, the second blank 21b takes on the shape set by the first mold 19a or the outer layer 5 or the fluid line 4. After solidification, a wall, in particular the lower wall 7 or the upper wall 8, is obtained. [Explanation of symbols]

[0056] 1 Battery Housing 2 Drive battery 3 Housing wall 4 fluid lines 5 Outer layer 6 Inner layer 7 Lower wall 8 Upper Wall 9 battery cells 10 Seal ring 11 Electrical or electronic components 12 Bonding Elements 13 8 side wall 14 8 cover 15 7 side wall Bottom of 16 7 17 Boundary 18 Manufacturing equipment 19a First Type 19b Second Type 20 Blank Feeder 21a First Blank 21b Second Blank 22 Robot 23 Separation device 24 Blow device 25 cavities

Claims

1. A battery housing (1) for a vehicle traction battery (2), the battery housing (1) having a housing wall (3), the housing wall (3) comprising plastic, the battery housing (1) having at least one fluid line (4) for a temperature control medium, A battery housing (1) characterized in that the fluid lines (4) are at least partially embedded in the housing wall (3).

2. 2. The battery housing (1) according to claim 1, characterized in that the housing wall (3) has an outer layer (5) and an inner layer (6), and the fluid lines (4) are preferably embedded in the inner layer (6), more preferably only in the inner layer (6).

3. 3. Battery housing (1) according to claim 1 or 2, characterized in that the fluid lines (4) and / or the outer layer (5) and / or the inner layer (6) comprise plastic.

4. 4. The battery housing (1) according to claim 1, wherein the battery housing (1) or the housing wall (3) has at least two walls (7, 8), in particular two housing shells, preferably a lower wall (7) and an upper wall (8).

5. 5. A battery housing (1) according to any one of claims 1 to 4, characterized in that the fluid line (4) comprises at least one bend and preferably extends at least partially in a serpentine manner.

6. A battery housing (1) according to any one of claims 1 to 5, characterized in that the battery housing (1) or the housing wall (3) comprises at least one fluid connection.

7. 7. Battery housing (1) according to any one of claims 1 to 6, characterized in that the material of the housing wall (3) or the inner layer (6) and / or the outer layer (5) contains fibers, in particular glass fibers.

8. A drive battery (2) having a battery housing (1) according to any one of claims 1 to 7, characterized in that the drive battery (2) is provided with battery cells (9).

9. Use of a battery housing (1) according to any one of claims 1 to 7 for a traction battery (2) or use of a traction battery (2) according to claim 8 in an electric or hybrid vehicle.

10. 1. A method for manufacturing a battery housing (1), in particular a battery housing (1) according to any one of claims 1 to 7, characterized in that a fluid line (4) is inserted into a mould (19a, 19b) for forming part of the battery housing (1) or a housing wall (3) or wall body (7, 8), and then material of the housing wall (3) or wall body (7, 8) is introduced into the mould (19a, 19b) in order to embed the fluid line (4) in the housing wall (3) or wall body (7, 8).

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