TRACTION BATTERY

Abstract

A traction battery of a motor vehicle is disclosed. The traction battery includes a housing having a housing pot and a lid closing the housing pot. A plurality of components to be cooled are arranged in the housing. A cooling device having at least one cooling channel is arranged within the housing and connected to the components to be cooled in a heat-transferring manner. At least one insert is provided. The components to be cooled lie against the at least one insert in a heat-transferring manner.

Claims

1. A traction battery for a motor vehicle, comprising: a housing having a pot-shaped housing pot and lid closing the housing pot, a plurality of components to be cooled arranged in the housing, a cooling device having at least one cooling channel that can be flowed through by a cooling medium, wherein the cooling device is arranged within the housing and is connected to the plurality of components to be cooled in a heat-transferring manner, at least one plate-like insert and the at least one cooling channel of the cooling device is delimited towards an outside by the housing pot in at least one region and by the at least one insert in at least one region, the housing pot and the lid are composed of plastic and the at least one insert composed of metal, and the plurality of components to be cooled lie against the at least one insert in a heat-transferring manner.

2. The traction battery according to claim 1, wherein the at least one insert is a deep-drawn insert, die-cast insert, or an extruded insert.

3. The traction battery according to claim 1, wherein at least one of: at least one of the plurality of components to be cooled includes a battery module of multiple battery cells stacked against one another, and at least one of the plurality of components to be cooled includes a control board at least one of for controlling the traction battery and of a battery module of the traction battery.

4. The traction battery according to, claim 1, wherein the at least one insert is sealed-off towards the housing pot.

5. The traction battery according to claim 1, wherein: the at least one insert is overmoulded by a plastic at an edge and circumferentially, and the at least one insert is connected to the housing pot via the overmoulded plastic in a material bonded manner.

6. The traction battery according to claim 5, wherein at least one of: the at least one insert is connected to the lid via the overmoulded plastic at an edge and circumferentially in a material bonded manner, and the lid is connected to the housing pot at an edge and circumferentially in a material bonded manner.

7. The traction battery according to claim 1, wherein: the at least one insert is embedded in the housing pot under the effect of heat at an edge and circumferentially, and the lid is connected to the housing pot at an edge and circumferentially in a material bonded manner.

8. The traction battery according to claim 1, wherein the at least one insert includes a bonding seam facing the housing pot and is bonded to the housing pot at an edge and circumferentially via the bonding seam.

9. The traction battery according to claim 8, wherein the at least one insert includes a further bonding seam facing the lid and is bonded to the lid via the further bonding seam at the edge and circumferentially.

10. The traction battery according to claim 1, wherein: the housing pot and the lid are joined to one another at an edge and circumferentially in a material bonded manner, the at least one insert is overmoulded with elastomer at an edge and circumferentially and defines a sealing lip, and the sealing lip of the at least one insert is compressed between the housing pot and the lid at the edge and circumferentially.

11. A motor vehicle, comprising: a traction battery, the traction battery including: a housing having a pot-shaped housing pot and a lid closing the housing pot, a plurality of components to be cooled arranged in the housing, a cooling device having at least one cooling channel that can be flowed through by a cooling medium, wherein the cooling device is arranged within the housing and is connected to the plurality of components to be cooled in a heat-transferring manner, at least one plate-like insert and the at least one cooling channel of the cooling device is delimited towards an outside by the housing pot in at least one region and by the at least one insert in at least one region, the housing pot and the lid are composed of plastic and the at least one insert composed of metal, and the plurality of components to be cooled lie against the at least one insert in a heat-transferring manner.

12. The motor vehicle according to claim 11, wherein the at least one insert is a deep-drawn metal insert, a die-cast metal insert, or an extruded metal insert.

13. The motor vehicle according to claim 11, wherein at least one of: at least one of the plurality of components to be cooled includes a battery module of multiple battery cells stacked against one another; and at least one of the plurality of components to be cooled includes a control board at least one of for controlling the traction battery and of a battery module of the traction battery.

14. The motor vehicle according to claim 11, wherein the at least one insert is sealed-off towards the housing pot.

15. The motor vehicle according to claim 11, wherein the at least one insert is overmoulded by a plastic at an edge and circumferentially, and wherein the at least one insert is connected to the housing pot via the overmoulded plastic via a welded connection or a vibration-welded connection.

16. The motor vehicle according to claim 15, wherein at least one of: the at least one insert is connected to the lid via the overmoulded plastic at an edge and circumferentially in a materially bonded manner, and the lid is connected to the housing pot at an edge and circumferentially in a materially bonded manner.

17. The motor vehicle according to claim 11, wherein the at least one insert is embedded in the housing pot, and wherein the lid is connected to the housing pot at an edge and circumferentially in a materially bonded manner.

18. The motor vehicle according to claim 11, wherein the at least one insert includes a bonding seam facing the housing pot and is bonded to the housing pot at an edge and circumferentially via the bonding seam.

19. The motor vehicle according to claim 11, wherein the at least one insert includes a bonding seam facing the lid and is bonded to the lid at an edge and circumferentially via the bonding seam.

20. The motor vehicle according to claim 11, wherein: the housing pot and the lid are joined to one another at an edge and circumferentially in a materially bonded manner, the at least one insert is overmoulded with elastomer at an edge and circumferentially such that a sealing lip is provided on the at least one insert via the overmoulded elastomer, and the sealing lip of the at least one insert is compressed between the housing pot and the lid at the edge and circumferentially.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0020] It shows, in each case schematically

[0021] FIG. 1 a sectional view of a traction battery according to the invention;

[0022] FIGS. 2 to 5 sectional views of joining locations formed differently in the traction battery according to the invention.

DETAILED DESCRIPTION

[0023] FIG. 1 shows a sectional view of a traction battery 1 according to the invention. The traction battery 1 comprises a housing 2 having a housing pot 2a and having a lid 2b and an insert 3. The insert 3 is plate-shaped and has a complex step-like shape. The housing pot 2a is pot-shaped. Here, the lid 2b is flat or plane, but can also be pot-shaped. The traction battery 1 additionally comprises a cooling device 4 with a cooling channel 5. The cooling channel 5 of the cooling device 4 is delimited towards the outside by the insert 3 and the housing pot 2a. The housing pot 2a and the lid 2b and the insert 3 are sealingly connected to one another at a joining location 6 at the edge and circumferentially.

[0024] In addition, the traction battery comprises multiple components 7 to be cooled which, here, are multiple battery modules 8 and a control board 9. The components 7 to be cooled are arranged in an interior 13 of the housing 2 which is formed within the housing 2 between the insert 3 or the housing pot 2a and the lid 2b. Here, the components 7 to be cooled are connected to the insert 3 in a heat-transferring manner so that heat—as indicated by arrows in FIG. 1—can be given off via the insert 3 to the cooling medium, preferentially the cooling liquid, in the cooling channel 5.

[0025] The housing pot 2a and the lid 2b are formed from plastic. The insert 3 is formed from metal in a deep-drawing method or in a die-casting method or in an extrusion method. Thus, exclusively the insert 3, which is in a direct heat-transferring contact with the components 7 to be cooled is formed from metal in the traction battery 1 according to the invention. By contrast, the housing 2 is completely formed from plastic. This produces cost, weight and material advantages.

[0026] FIG. 2 shows a sectional view of the traction battery 1 at the joining location 6 in a first embodiment. Here, the insert 3 is overmoulded with plastic circumferentially and at the edge, preferentially with a thermoplastic. The housing pot 2a is vibration-welded to the insert 3 with the overmoulded plastic 12. Because of this, the cooling channel 5 is securely sealed-off from the components 7 to be cooled in the housing 2 or in the interior 13 of the housing 2. The lid 2b is vibration-welded to the insert 3 with the overmoulded plastic 12. Because of this, the housing 2 is now securely sealed-off towards the outside. Thus, the housing pot 2a and the lid 2b are each connected in a material bonded manner to the insert 3 and via the insert 3 at the joining location 6.

[0027] FIG. 3 shows a sectional view of the traction battery 1 at the joining location 6 in a second embodiment. Here, the insert 3 is embedded in the housing pot 2a under the effect of heat circumferentially and at the edge. Because of this, the cooling channel 5 is securely sealed-off from the components 7 to be cooled in the housing 2 or in the interior 13 of the housing 2. The housing pot 2a and the lid 2b are vibration-welded to one another at the edge and circumferentially. Because of this, the housing 2 is now securely sealed-off towards the outside. Thus, the housing pot 2a and the lid 2b are directly connected to one another in a material bonded manner at the joining location 6. Then, the insert 3 is connected to the housing pot 2a in a material bonded manner.

[0028] FIG. 4 shows a sectional view of the traction battery 1 at the joining location 6 in a third embodiment. Here, the insert 3 comprises a bonding seam 10a facing the housing pot 2a and is bonded to the housing pot 2a at the edge and circumferentially via the bonding seam 10a. Because of this, the cooling channel 5 is securely sealed-off from the components 7 to be cooled in the housing 2 or in the interior 13 of the housing 2. In addition, the insert 3 comprises a bonding seam 10b facing the lid 2b and is bonded to the lid 2b at the edge and circumferentially via the bonding seam 10b. Because of this, the housing 2 is sealed-off towards the outside. Thus, the housing pot 2a and the lid 2b are each connected at the joining location 6 to the insert 3 and via the insert 3 in a material bonded manner.

[0029] FIG. 5 shows a sectional view of the traction battery at the joining location 6 in a fourth embodiment. The insert 3 is overmoulded with elastomer at the edge and circumferentially as a result of which a sealing lip 11 is formed on the insert 3. The housing pot 2a and the lid 2b are joined to one another at the edge and circumferentially in a material bonded manner and the sealing lip 11 is compressed between the housing pot 2a and the lid 2b. Because of this, the cooling channel 5 is now securely sealed-off from the component 7 to be cooled in the housing 2 or in the interior 13 of the housing 2 and the housing 2 towards the outside.