Temperature control device and battery disconnect unit

Abstract

The invention relates to a temperature control device for a battery separation unit (10) comprising a first temperature control plate (21) on which a switching device (3) of the battery separation unit (10) can be arranged, and a second temperature control plate (22) on which power electronics (4) of the battery separation unit (10) can be arranged, wherein the first temperature control plate (21) and the second temperature control plate (22) are directly connected to each other by forming a common flow space (5) through which temperature control fluid can flow, and wherein the switching device (3) and the power electronics (4) can be arranged on a top surface (6) of the temperature control device (1).

Description

State of the art:

[0001] The invention relates to a temperature control device according to the preamble of the independent claim. The present invention also relates to a battery disconnect unit.

[0002] Electrical switching devices such as a relay are usually arranged between a voltage tap of a terminally arranged battery cell of a battery module and the total voltage tap of such a battery module and serve to switch, i.e., turn on and off, the battery module or the battery which comprises such a battery module.

[0003] In principle, such electrical switching devices must be actively cooled, especially since they carry the entire current of the battery module. Disclosure of the invention:

[0004] A temperature control device with the features of the independent claim offers the advantage that a thermal connection or coupling between the temperature control of a switching device and the temperature control of power electronics can be reliably reduced or avoided. This can reliably increase the service life of such components.

[0005] According to the invention, a temperature control device for a battery disconnect unit is provided. The temperature control device comprises a first temperature control plate and a second temperature control plate. A switching device of the battery disconnect unit can be arranged on the first temperature control plate, and power electronics of the battery disconnect unit can be arranged on the second temperature control plate.

[0006] The first temperature control plate and the second temperature control plate are connected to each other in a materially bonded manner, forming a common flow space through which the temperature control fluid can flow.

[0007] The switching device and the power electronics can be arranged on the top side of the temperature control device.

[0008] The measures listed in the dependent claims enable advantageous further developments and improvements of the device specified in the independent claim.

[0009] It is advantageous if the first temperature control plate has a primary connection area where the switching device can be mounted, and if the second temperature control plate has a secondary connection area where the power electronics can be mounted. The secondary connection area is located directly adjacent to the flow chamber. This allows the power electronics to be directly exposed to the flow of temperature control fluid for reliable heat dissipation. This offers the advantage that a comparatively high heat flow can be dissipated over a comparatively small area, thus ensuring reliable temperature control of the power electronics.

[0010] According to a particularly preferred aspect of the invention, the first connection area and the second connection area are arranged offset from each other in a longitudinal direction of the temperature control device. This allows the first connection area and the second connection area to be reliably thermally decoupled.

[0011] It is advantageous if the first connection area forms at least two projections. A busbar of the switching device can be arranged on each of these projections. In particular, these projections are not covered by the second temperature control plate. Furthermore, these projections cannot be arranged directly adjacent to the flow chamber. Therefore, the switching device is thermally conductive only with the projections of the first temperature control plate.

[0012] In particular, a thermal compensation material can be arranged between a busbar of the switching device and one of the projections.

[0013] In particular, two projections are arranged offset in the longitudinal direction from the second connection area, so that in the longitudinal direction a first projection is arranged first, then the second connection area is arranged and finally a second projection is arranged.

[0014] Furthermore, it is preferred if the temperature control device has a first connection designed to admit temperature control fluid into the flow chamber, and a second connection designed to discharge temperature control fluid from the flow chamber. The first and second connections are arranged opposite each other along the longitudinal axis of the temperature control device. In particular, this allows for a straight flow path, thereby facilitating thermal decoupling between the first and second temperature control plates.

[0015] Furthermore, it is preferred if an internal insert is also included in the flow space. The internal insert can be formed, for example, by means of a stamping and / or rolling process.

[0016] Such an internal insert can, for example, increase the heat transfer between the temperature control fluid and the first temperature control plate and / or the second temperature control plate by causing a flow disturbance and / or an increase in the heat transfer surface area.

[0017] Furthermore, the first and second temperature control plates can be formed using a stamping and / or forming process.

[0018] Advantageously, the first and second temperature control plates are made of a metallic material, such as aluminum. In particular, the inner insert can also be made of a metallic material, such as aluminum.

[0019] It should be noted that the first and second temperature control plates are preferably soldered together. Specifically, the first and second temperature control plates may have a solder plating, which allows them to be joined, for example, by brazing. Furthermore, the first and second temperature control plates may also be soldered to the inner insert and / or to the first and / or second connection.

[0020] The described solder joints, particularly between the first and second temperature control plates, are preferably designed to be comparatively narrow, thus minimizing heat flow through the joint. This significantly reduces heat flow from the switching device to the power electronics and vice versa, thereby reducing interactions between the cooling of the power electronics and the switching device.

[0021] It is also advantageous for the first and second temperature control plates to have different thicknesses. Specifically, the first plate has a first thickness, and the second plate has a second thickness, with the first thickness being greater than the second. This offers the advantage that the first thickness of the first plate and the second thickness of the second plate can be adapted to the different thermal requirements for heat dissipation of the power electronics and the switching device. Specifically, heat dissipation of the power electronics occurs through the second plate, while heat dissipation of the switching device occurs along the first plate.

[0022] The present invention also relates to a battery disconnect unit with a temperature control device as described above. In this unit, a switching device is arranged in a thermally conductive manner on the first temperature control plate, and power electronics are arranged in a thermally conductive manner on the second temperature control plate.

[0023] It should be noted here that, for example, the heat input from cooling the switching device acts exclusively on the first temperature control plate, and the heat input from cooling the power electronics acts exclusively on the second temperature control plate. This allows the two cooling systems to be thermally decoupled, thereby minimizing or preventing interactions between the described heat inputs. Brief description of the drawings:

[0024] Exemplary embodiments of the invention are shown in the drawings and explained in more detail in the following description. It shows: Fig. 1 an embodiment of a temperature control device according to the invention for a battery separation unit, Fig. 2 the embodiment of the temperature control device according to Fig. 1 in a sectional view from the side and Fig. 3 in a sectional view from the side an embodiment of a battery separation unit according to the invention.

[0025] Fig. Figure 1 shows an embodiment of a temperature control device 1 of a battery separation unit 10.

[0026] The temperature control device 1 comprises a first temperature control plate 21, on which a Fig. 1. The non-recognizable switching device 3 of the battery disconnect unit 10 can be arranged.

[0027] Furthermore, the temperature control device 1 comprises a second temperature control plate 22, on which a Fig. 1. The power electronics 4 of the battery separation unit 10 can be arranged in a way that is not recognizable.

[0028] The first temperature control plate 21 and the second temperature control plate 22 are directly bonded together. Furthermore, the first temperature control plate 21 and the second temperature control plate 22 are connected in such a way that a Fig. 1. A common flow space 5 is formed that is not recognizable.

[0029] The first temperature control plate 21 and the second temperature control plate 22 are made of a metallic material, in particular aluminum.

[0030] Furthermore, the switching device 3 and the power electronics 4 can be arranged on a top surface 6 of the temperature control device 1.

[0031] Fig. Figure 2 shows the embodiment of the temperature control device 1 according to Fig. 1 in a sectional view from the side.

[0032] The first temperature control plate 21 and the second temperature control plate 22 can be seen, which are directly connected to each other by forming a common flow space 5. In particular, such a material-bonded connection 25 can be formed by soldering.

[0033] From the Fig. 1 and Fig. Figure 2 shows that the first temperature control plate 21 forms a first connection area 71 on which the switching device 3 can be arranged. Furthermore, it can be seen from the Fig. 1 and Fig. 2 to recognize that the second temperature control plate 22 forms a second connection area 72 on which the power electronics 4 can be arranged.

[0034] Especially from the Fig. Figure 2 shows that the second connection area 72 is located directly adjacent to the flow chamber 5.

[0035] From the Fig. 1 can be seen that the first connection area 71 forms two projections 75, on each of which a busbar 35 of the switching device 3 can be arranged.

[0036] Furthermore, the Fig. 1, that the first connection area 71 and the second connection area 72 are arranged offset from each other in a longitudinal direction 8 of the temperature control device 1.

[0037] An internal insert 50 is also included in the flow chamber 5.

[0038] The temperature control device 1 forms a first connection 91, which is configured to admit temperature control fluid into the flow chamber 5. Furthermore, the temperature control device 1 forms a second connection 92, which is configured to discharge temperature control fluid from the flow chamber 5.

[0039] The first connection 91 and the second connection 92 are arranged opposite each other in a longitudinal direction 8 of the temperature control device 1.

[0040] Furthermore, the Fig. 2, that the first tempering plate 21 has a first thickness 27, and that the second tempering plate 22 has a second thickness 28.

[0041] The first thickness 27 is larger than the second thickness 28.

[0042] Fig. Figure 3 shows a sectional view from the side of an embodiment of a battery separation unit 10 according to the invention.

[0043] The battery separation unit 10 includes the components in the Fig. 1 and Fig. 2 described temperature control device 1 as well as a switching device 3, in particular a relay 30, and a power electronics 4.

[0044] The switching device 3 is thermally connected to the first temperature control plate 21, in particular to the first connection area 71. Specifically, a busbar 35 of the switching device 3 is thermally connected to a projection 75. For improved thermal connection, a thermal compensation material 11 can be arranged between the busbar 35 and the projection 75. Furthermore, an electrical insulation 12 can also be arranged.

[0045] The power electronics 4 is arranged in a thermally conductive manner on the second temperature control plate 22, in particular the second connection area 72.

[0046] Furthermore, it clarifies Fig.3 the heat dissipation from the switching device 3 along the first temperature control plate 21 into the temperature control fluid received in the flow chamber 5 and also the heat dissipation from the power electronics 4 through the second temperature control plate 22 into the temperature control fluid received in the flow chamber 5.

Claims

[1] Temperature control device of a battery separation unit (10) with a first temperature control plate (21), on which a switching device (3) of the battery separation unit (10) can be arranged, and a second temperature control plate (22), on which a power electronics unit (4) of the battery separation unit (10) can be arranged, wherein the first temperature control plate (21) and the second temperature control plate (22) are directly connected to one another in a materially bonded manner to form a common flow space (5) through which temperature control fluid can flow, characterized by that the switching device (3) and the power electronics (4) can be arranged on an upper side (6) of the temperature control device (1). [2] Tempering device according to the preceding claim 1, characterized bythat the first temperature control plate (21) forms a first connection region (71) on which the switching device (3) can be arranged, and the second temperature control plate (22) forms a second connection region (72) on which the power electronics (4) can be arranged, wherein the second connection region (72) is arranged directly adjacent to the flow space (5). [3] Tempering device according to the preceding claim 2, characterized by that the first connection area (71) and the second connection area (72) are arranged offset from one another in a longitudinal direction (8) of the tempering device (1). [4] Tempering device according to one of the preceding claims 2 or 3, characterized by , that the first connection area (71) forms at least two projections (75), on each of which a busbar (35) of the switching device (3) can be arranged. [5] Tempering device according to one of the preceding claims 1 to 4, characterized by , that the temperature control device (1) forms a first connection (91) which is designed to admit temperature control fluid into the flow space (5), and the tempering device (1) forms a second connection (92) which is designed to discharge tempering fluid from the flow space (5), wherein the first connection (91) and the second connection (92) are arranged opposite one another in a longitudinal direction (8) of the temperature control device (1). [6] Tempering device according to one of the preceding claims 1 to 5, characterized by that an inner insert (50) is further accommodated in the flow space (5). [7] Tempering device according to one of the preceding claims 1 to 6, characterized bythat the first tempering plate (21) and the second tempering plate (22) are made of a metallic material, in particular aluminum. [8] Tempering device according to one of the preceding claims 1 to 7, characterized by , that the first temperature control plate (21) has a first thickness (27) and the second temperature control plate (22) has a second thickness (28), wherein the first thickness (27) has a greater value than the second thickness (28). [9] Battery separation unit with a temperature control device according to one of the preceding claims 1 to 8, wherein a switching device (3) is arranged in a thermally conductive manner on the first temperature control plate (21), and a power electronics unit (4) is arranged in a thermally conductive manner on the second temperature control plate (22).

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