COOLING DEVICE FOR COOLING POWER ELECTRONICS OF A BATTERY SYSTEM, AND BATTERY SYSTEM

Abstract

A cooling device for cooling power electronics of a battery system comprising a plurality of battery cells, the cooling device having a cooling channel with a cooling channel base, with a cooling channel top, and with at least one cooling channel wall, wherein the power electronics are connectable in a heat-transferring manner to the cooling channel top on a side of the cooling channel top facing away from the cooling channel, wherein the cooling device has an inlet port for inflow of a cooling liquid into the cooling channel and an outlet port for outflow of the cooling liquid from the cooling channel, wherein the cooling channel top has a base surface and at least one elevation on the side facing the cooling channel, wherein the elevation forms a venting space, and wherein the cooling device has a venting interface for venting the venting space.

Claims

1. A cooling device (10) for cooling power electronics (120) of a battery system (200) comprising a plurality of battery cells (110), the cooling device (10) having a cooling channel (40) with a cooling channel base (46), with a cooling channel top (42), and with at least one cooling channel wall (44), wherein the power electronics (120) are connectable in a heat-transferring manner to the cooling channel top (42) on a side of the cooling channel top (42) facing away from the cooling channel (40), wherein the cooling device (10) has an inlet port (20) for inflow of a cooling liquid (K) into the cooling channel (40) and an outlet port (30) for outflow of the cooling liquid (K) from the cooling channel (40), wherein the cooling channel top (42) has a base surface (50) and at least one elevation (52) on a side facing the cooling channel (40), wherein the elevation (52) forms a venting space (54), and wherein the cooling device (10) has a venting interface (90) for venting the venting space (54).

2. The cooling device (10) according to claim 1, wherein the cooling channel top (42) has first and second planes (E1, E2), wherein the second plane (E2) is arranged above the first plane (E1), wherein the base surface (50) is arranged in the first plane (E1), and wherein the venting space (54) extends between the first plane (E1) and the second plane (E2).

3. The cooling device (10) according to claim 1, wherein the venting space (54) rises along a flow path (S) of the cooling liquid (K) at least in portions.

4. The cooling device (10) according to claim 3, wherein the venting space (54) has an initial portion (54A) and an end portion (54E) along the flow path (S) of the cooling liquid (K), wherein the venting interface (90) is arranged in the end portion (54E) of the venting space (54).

5. The cooling device (10) according to claim 1, wherein the venting interface (90) has a smaller diameter (D1) for venting than a diameter (D2) of the inlet port (20) for the cooling liquid (K) and/or a diameter (D3) of the outlet port (30) for the cooling liquid (K), and/or the inlet port (20) and/or the outlet port (30) are arranged below the base surface (50).

6. The cooling device (10) according to claim 1, wherein the flow channel (40) comprises a plurality of flow disturbance devices (56).

7. The cooling device (10) according to claim 1, wherein the venting space (54) is arranged in a U-shape around the base surface (50), at least in portions.

8. The cooling device (10) according to claim 1, wherein the cooling device (10) has a main body (12), wherein the cooling channel (40) is configured in an integrally bonded manner in the main body (12), and/or wherein the main body (12) is configured to receive the power electronics (120) and/or the battery cell stack (100).

9. The cooling device (10) according to claim 1, wherein the cooling channel top (42) has first and second planes (E1, E2), wherein the second plane (E2) is arranged above the first plane (E1), wherein the base surface (50) is arranged in the first plane (E1), wherein the venting space (54) extends between the first plane (E1) and the second plane (E2), and wherein the first plane (E1) and the second plane (E2) are formed parallel to one another.

10. The cooling device (10) according to claim 1, wherein an upper side of the venting space (54) rises along a flow path (S) of the cooling liquid (K) at least in portions, up to the venting interface (90).

11. The cooling device (10) according to claim 10, wherein the venting space (54) has an initial portion (54A) and an end portion (54E) along the flow path (S) of the cooling liquid (K), wherein the venting interface (90) is arranged in the end portion (54E) of the venting space (54).

12. The cooling device (10) according to claim 1, wherein the flow channel (40) comprises a plurality of flow disturbance devices (56), and wherein the flow disturbance devices (56) are connected to the cooling channel top (42) and extend towards the cooling channel base (46).

13. The cooling device (10) according to claim 1, wherein the cooling device (10) has a housing (12), wherein the cooling channel (40) is configured in an integrally bonded manner in the housing (12), and/or wherein the housing (12) is configured to receive the power electronics (120) and/or the battery cell stack (100).

14. A battery system (200) comprising a battery cell stack (100) having a plurality of battery cells (110), power electronics (120), and a cooling device (10) according to claim 1, wherein the power electronics (120) are connected in a heat-transferring manner to the cooling channel top (42) on the side of the cooling channel top (42) facing away from the cooling channel (40).

15. The battery system (200) according to claim 14, wherein the power electronics (120) comprise a logic device (122) and a power device (124).

16. The battery system (200) according to claim 14, wherein the power electronics (120) comprise a logic device (122) and a power device (124), wherein the logic device (122) is arranged on the side of the base surface (50) of the cooling channel top (42) facing away from the cooling channel (40), and wherein the power device (124) is arranged on the side of the venting space (54) of the cooling channel top (42) facing away from the cooling channel (40).

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0022] A cooling device according to the invention and a battery system will be explained in more detail below with reference to drawings, which show schematically, in each case:

[0023] FIG. 1 a sectional side view of a battery system comprising a battery cell stack with a plurality of battery cells, power electronics and a cooling device,

[0024] FIG. 2 a perspective view from below of a cooling device, and

[0025] FIG. 3 a sectional perspective view from the side of another cooling device.

DETAILED DESCRIPTION

[0026] Elements with the same function and mode of operation are each provided with the same reference signs in FIGS. 1 to 3.

[0027] FIG. 1 shows a schematic sectional side view of a battery system 200 with a battery cell stack 100 with a plurality of battery cells 110, power electronics 120, and a cooling device 10. The cooling device 10 for cooling the power electronics 120 of the battery cell stack 100 with a plurality of battery cells 110 has a cooling channel 40 with a cooling channel base 46, with a cooling channel top 42, and with at least one cooling channel wall 44. The power electronics 120 are connected in a heat-transferring manner to the cooling channel top 42 on a side of the cooling channel top 42 facing away from the cooling channel 40. On the side facing the cooling channel 40, the cooling channel top 42 has a base surface 50 and at least one elevation 52, wherein the elevation 52 forms a venting space 54. The cooling channel top 42 has two planes E1, E2, wherein the second plane E2 is arranged above the first plane E1, wherein the base surface 50 is arranged in the first plane E1, and wherein the venting space 54 extends between the first plane E1 and the second plane E2, wherein the first plane E1 and the second plane E2 are formed parallel to one another. The flow channel 40 comprises a plurality of flow disturbance devices 56, wherein the flow disturbance devices 56 are connected to the cooling channel top 42 and extend towards the cooling channel base 46. The cooling device 10 has a main body 12 in the form of a housing, wherein the cooling channel 40 is formed in an integrally bonded manner in the main body 12, and wherein the main body 12 is designed to receive the power electronics 120 and the battery cell stack 100. The power electronics 120 comprises a logic device 122 and a power device 124, wherein the logic device 122 is arranged on the side of the base surface 50 of the cooling channel top 42 facing away from the cooling channel 40, and wherein the power device 124 is arranged on the side of the venting space 54 of the cooling channel top 42 facing away from the cooling channel 40

[0028] FIG. 2 shows a schematic perspective view from below of cooling device 10. The cooling device 10 has an inlet port 20 for inflow of a cooling liquid K into the cooling channel 40, an outlet port 30 for outflow of the cooling liquid K from the cooling channel 40. The cooling device 10 has a venting interface 90 for venting the venting space 54. The venting space 54 has an initial portion 54A and an end portion 54E along the flow path S of the cooling liquid K, wherein the venting interface 90 is arranged in the end portion 54E of the venting space 54. The venting interface 90 has a smaller diameter D1 for venting than a diameter D2 of the inlet port 20 for the cooling liquid K and a diameter D3 of the outlet port 30 for the cooling liquid K. The inlet port 20 and the outlet port 30 are arranged below the base surface 50, in this case in front of the base surface 50 out of the image plane. The venting space 54 is arranged in a U-shape around the base surface 50, at least in portions.

[0029] FIG. 3 shows a schematic sectional perspective view of another cooling device 10 from the side. FIG. 3 advantageously shows how the venting interface 90 is configured for venting the venting space 54 and is arranged for this purpose between the first plane E1 and the second plane E2. A cooling device 10 configured in this way is particularly advantageous, since cooling of the power electronics 120 (not shown) is provided, wherein venting of the cooling channel 40, in particular of the venting space 54, is made possible by particularly simple and cost-effective means.