DE102021200686A1 - Temperature control device with medium channels in a sheet metal stack - Google Patents

Abstract

The invention relates to a temperature control device for temperature control of an object. The temperature control device has a stack of metal sheets (14) with a plurality of metal sheets (16c, d) which are firmly, in particular non-detachably, connected. A plurality of sheets (16c, d) have channels (18g, h), in particular laser-cut, so that a medium (32) can flow through the sheet stack 14 through the channels (18g, h). Two ducts (18g, h) of a plate (16c, d) can be separated by a web (20c), which can be flowed around via a bypass duct (22d) in an adjacent plate (16c, d). Alternatively or additionally, a channel (18g, h) of a metal sheet (16c, d) can be narrowed, with a bypass recess being formed in an adjacent metal sheet (16c, d) at the narrow point. An inflow connection and an outflow connection of the temperature control device can be provided on the same side of the temperature control device. The invention also relates to a method for producing such a temperature control device.

Description

Background of the Invention

The invention relates to a temperature control device. The invention also relates to a method for producing such a temperature control device.

It is known to form temperature control devices from sheet metal. Channels of the temperature control device are formed by forming the metal sheet in sections, in particular by deep-drawing the metal sheet. As an alternative to this, it is known to mill channels. However, due to the manufacturing process, the course of the channels is subject to strict limits. Furthermore, channels with sloping side walls are formed during deep-drawing, so that the available space is not optimally used.

object of the invention

It is therefore the object of the invention to provide a temperature control device which is easy to manufacture but nevertheless allows channels which can be configured very flexibly. It is also an object of the invention to provide a method for producing such a temperature control device.

Description of the invention

This object is achieved according to the invention by a temperature control device according to patent claim 1 and a method according to patent claim 12. The dependent patent claims describe preferred embodiments.

The object according to the invention is thus achieved by a temperature control device, wherein the temperature control device has a sheet stack made up of a plurality of sheets stacked on top of one another and connected to one another. Several metal sheets have channels that can be designed at least in sections in the form of through-holes. A “channel” is understood to mean a coherent recess, in particular in the form of a through-hole, in a metal sheet. At least some channels are fluidically connected in order to allow a medium to flow through the temperature control device. The structuring of individual sheets and the subsequent assembly into a sheet stack enables a very flexible design of the channels.

The sheet metal stack is preferably made very thin. The thickness of the stack of laminations is preferably less than 20%, in particular less than 10%, preferably less than 5%, of the width and/or length of the stack of laminations.

A fluid, in particular water, can be used as the medium. The channels can expand or narrow in the course of the medium flow in order to slow down or accelerate the medium flow. However, the sum of the cross-sectional areas of the inflows corresponds to more than 70% of the sum of the cross-sectional areas of the outflows. The sum of the cross-sectional areas of the inflows preferably corresponds to more than 80%, in particular to more than 90%, of the sum of the cross-sectional areas of the outflows. This enables a particularly even flow through the channels.

More than 70%, in particular more than 80%, particularly preferably more than 90%, of the channels of a metal sheet run in a meandering manner. As a result, the available installation space can be utilized particularly well.

As explained above, the channels of the stack of laminations are formed in sections by recesses, in particular in the form of through-holes, in a plurality of laminations. In order to simplify the manufacture of the temperature control device, channels are formed in sections in a single metal sheet.

With very long ducts, the sheet metal can become unstable. Channels of a metal sheet are therefore preferably separated by a web, with a metal sheet adjacent to the metal sheet having a bypass channel in the region of the web, so that the medium can flow around the web in the bypass channel. The bypass channel is preferably designed in the form of a through-hole. As an alternative or in addition to this, the bypass channel can have a diamond-shaped design.

The web can be formed perpendicularly to the direction of flow of the channels adjoining the web. However, the web preferably has an angle that is not equal to 90°, in particular between 50° and 89°, to the direction of flow of the channels adjoining the web. In particular, the web is formed at an angle of between 65° and 85°, preferably between 68° and 82°, to the direction of flow of the channels. Due to the oblique design of the ridge, the medium can be rolled around the ridge instead of being pressed around the ridge. Furthermore, the installation space for channels in different metal sheets can be optimally utilized due to the oblique design of the web, without the channels having to be routed parallel to one another.

The bypass channel and the channels adjoining the bypass channel can together have a thread-like course. This results in a particularly low-pressure loss Corkscrew-shaped flow of the medium around the bridge achievable.

In a further preferred embodiment of the invention, a channel of a plate is narrowed at a constriction in the main plane of the plate, with an adjacent plate in the area of the constriction having a bypass recess, in particular in the form of a through-hole, to enable a uniform flow of medium. The cross-sectional area of the channel is preferably more than 70% constant in the region of the constriction, in particular more than 80%, particularly preferably more than 90%.

A combination of web, bypass channel, constriction and bypass recess is particularly preferably provided in the stack of sheets. In this case, the bypass channel and the bypass recess are preferably located in a central plate, on which a plate with the web rests on one side and a plate with the constriction rests on the other side. As a result, the media flows can be accommodated in a space-saving manner and avoiding one another in the sheets separated by the central sheet, without having to do without a web.

More than 70% of the channels of different sheets preferably do not run parallel to one another and/or not one above the other. More than 80%, in particular more than 90%, of the channels preferably do not run parallel to one another and/or not one above the other. This effectively reduces heat transfer between the metal sheets.

In order to use the available installation space particularly effectively, more than 70% of the channels of the sheet stack can be designed in the form of through-holes with side walls perpendicular to the main plane of the sheet. More than 80%, in particular more than 90%, of the channels in the stack of sheets are preferably in the form of through-holes with side walls perpendicular to the main plane of the sheet.

Alternatively or additionally, a channel in a sheet metal may be tapered with respect to the main plane of the sheet metal. The canal can widen and/or narrow in the process.

In order to reduce the resistance for the medium between the sheets, a channel of a sheet can have an elevation at the transition into the channel of an adjacent sheet. The elevation can have one or more steps. Alternatively or additionally, the elevation can have a ramp, i.e. a slope.

The sheets of the sheet stack can be of different thicknesses, the “thickness” being understood as meaning the dimension of a sheet perpendicular to its main plane. However, several, in particular all, metal sheets are preferably of the same thickness.

In a further preferred embodiment of the invention, several metal sheets have a reference point system. All sheets of the sheet stack preferably have a reference point system. As a result, the sheets can be easily aligned with one another. Since the channels can be designed particularly flexibly, they can easily bypass the reference points.

The temperature control device can be designed to cool an object, in particular a battery. The cooling device can have a trough for receiving the object. The trough is preferably formed flat on one of the laminations of the stack of laminations or is formed from one of the laminations of the stack of laminations. The temperature control device can have the object arranged in the tub, in particular in the form of the battery. The object can itself be designed to limit one or more channels. In particular, the object can represent a ceiling and/or a floor of one or more ducts.

The object according to the invention is also achieved by a method for producing a temperature control device described here, the channels being beam-cut, in particular laser-beam-cut.

After the channels have been produced, the sheets can be removed with an unloading device and stacked in an aligned manner.

The unloading device can provide at least one metal sheet, preferably several metal sheets, with a soldering paste before stacking. In particular, the unloading device can pull the metal sheet over a roller provided with soldering paste.

At least one metal sheet, in particular a plurality of metal sheets, preferably all metal sheets, can be solder-plated and, after stacking, can be connected by heating to form the stack of metal sheets.

Further advantages of the invention result from the description and the drawing. Likewise, the features mentioned above and those detailed below can be used according to the invention individually or collectively in any combination. The embodiments shown and described are not to be understood as an exhaustive list, but rather have an exemplary character for the description of the invention.

character list

• 1 shows a top view of a tray-shaped temperature control device with a stack of metal sheets.
• 2 shows a side view of the temperature control device 1 with a battery indicated by dashed lines.
• 3 shows a plan view of a bottom sheet of the stack of sheets 1 .
• 4 shows a plan view of the metal sheet 3 Adjacent sheet metal for the line of returning medium.
• 5 shows a plan view of the metal sheet 4 adjacent sheet metal with channels for escape of the medium, which is mainly in the sheet metal according to 4 or 6 is conducted.
• 6 shows a plan view of the metal sheet 5 adjacent metal sheet to the line of inflowing medium.
• 7 shows a plan view of the sheet metal stack from the sheets according to FIG 3 until 6 .
• 8th shows a partial view X 7 , which shows the flow around a bridge.
• 9 shows a partial view Y 7 , from which the flow around a bottleneck can be seen.
• 10 shows a partial view Z 7 , taking the sheet metal out 6 is hidden.
• 11 shows an isometric view of the sheet metal stack 7 .
• 12 shows a partial view V from 11 , from which the medium flow around webs and constrictions can be seen.
• 13 shows a partial view W from 11 , showing the deflection of the medium flow from the plate 6 into the sheet metal 4 is evident.
• 14 shows schematically a preferred method for producing the sheet stack.

1 shows a temperature control device 10. The temperature control device 10 is preferably in the form of a cooling device.

2 shows the temperature control device 10 from 1 in a side view. Out of 2 it can be seen that the temperature control device 10 is embodied in the form of a trough for receiving an object 12 to be temperature-controlled, indicated here by dashed lines, here in the form of a battery. The temperature control device 10 has a stack of metal sheets 14 which can be placed flat against the object 12 in order to effectively temperature control the object 12 .

3 shows a metal sheet 16a, which represents a floor panel in the present exemplary embodiment.

4 shows another sheet 16b, which is arranged flat adjacent to sheet 16a. The sheet metal 16b has several channels, of which 4 for reasons of clarity, only the channels 18a, 18b, 18c are provided with a reference number. The channels 18a-c are distanced from the object 12 (see 2 ) provided and serve to return a medium (heated here by the object 12).

In order to maintain the stability of the metal sheet 16b, webs 20a, 20b are provided between the channels 18a-c. Because of the webs 20a, b, however, the medium in the metal sheet 16b cannot flow from the channel 18a into the channel 18b or from the channel 18b into the channel 18c.

5 shows that to solve this problem, another metal sheet 16c is provided, which is flat adjacent to metal sheet 16b (see 4 ) is arranged and has several bypass channels, of which in 5 only the bypass channels 22a, 22b are provided with a reference number. Through the bypass channel 22a, the medium from the channel 18a (see 4 ) into channel 18b (see 4 ) flow. Through the channel 22b, the medium from the channel 18b (see 4 ) into the channel 18c (see 4 ) flow.

Furthermore, bypass recesses are formed in the sheet metal 16c, of which 5 for reasons of clarity, only the bypass recesses 24a, 24b are provided with a reference number. The bypass recesses 24a, b are used to increase the channel depth as below with reference to 6 is explained.

6 16 shows another metal sheet 16d with a plurality of channels, of which only channels 18d, 18e, 18f are provided with a reference number for reasons of clarity. The channels 18d, e have a constriction 26a, 26b. The constrictions 26a, b are in the form of channel constrictions in the main plane of the metal sheet 16d. In order to ensure a uniform medium flow, i.e. a largely constant channel cross-sectional area, the medium can flow into the bypass recesses 24a, b at the constrictions 26a, b (see 5 ) evade.

The flexibility in designing the temperature control device can be seen in the example of channel 18f, which runs around a reference point 28 a reference point system 30 can be created.

The metal sheet 16d is used to supply the medium. To the item 12 (see 2 ) to effectively temper, to cool here, the medium in the plate 16d is preferably guided in a meandering manner. Then the medium is removed from the object 12 (see 2 ) led away. In the present case, the medium is fed over the sheet metal 16c (see 5 ) into the metal sheet 16b (see 4 ) and taken away from there, in particular collected.

7 shows a plan view of the sheet metal stack 14 (see also 1 ) with the sheets 16a-d (see 3 until 6 ).

8th shows the sheet metal stack 14 in the region X of FIG 7 . 8th illustrates how a web 20c of the sheet metal 16d is undermined by medium 32. For this purpose, a bypass channel 22c is provided in the sheet metal 16c. Channels 18g, 18h have curves 34a, 34b which contribute to the medium 32 flowing around the web 20c in a thread-like manner. As a result, the medium 32 is guided past the web 20c with particularly low friction.

Out of 8th it can also be seen that the web 20c has an angle w that is not equal to 90° to the basic flow direction of the medium 32 in the channels 18g, h. The angle w is preferably between 65° and 85°. This enables a particularly space-saving and pressure-constant option for guiding the medium 32 .

9 shows the sheet metal stack 14 in the area Y of FIG 7 . 9 illustrates the possibility of the medium 32 deviating at a constriction 26c of the metal sheet 16d. A bypass recess 24c is provided in the sheet metal 16c.

10 shows the sheet metal stack 14 in the area Z of FIG 7 , but without the plate 16d. Out of 10 it can be seen that bypass channels, here by way of example a bypass channel 22d, are preferably rhombic in shape in order to enable a low-friction flow of medium in a confined space. In the present case, the bypass channel 22d is designed to bypass a web 20d of the metal sheet 16b.

11 shows the sheet metal stack 14 in an isometric view. Out of 11 it can be seen that its thickness d is significantly smaller than its width b and its length l.

12 shows the sheet metal stack 14 in the area V according to FIG 11 . Out of 12 it can be seen that the channels, here by way of example the channel 18e, have vertical side walls 36a, 36b. This is made possible in particular by a preferred manufacturing process that 14 is shown.

13 shows a further section of the sheet stack 14 in the area W according to FIG 11 . Out of 13 it can be seen that the medium 32, in particular after it has been guided in a meandering fashion in the metal sheet 16d, here by way of example in a channel 18i, through the metal sheet 16c into the metal sheet 16b (see 4 ) to be led. In the present example, the medium 32 is fed into the channel 18a (see 4 ) out, from there into the channels 18b, c (see 4 ) and finally collected and discharged.

14 shows a preferred method 38 for producing the temperature control device 10, wherein 14 in particular the production of the sheet metal stack 14 represents.

A beam cutting device 40 with a beam cutting tool 42, in particular in the form of a laser cutting device, cuts the channels 18a-i in the individual sheets 16a-d according to the previous description. The jet cutting device 40 can have a discharge device 44 . The unloading device 44 removes the individual sheets 16a-d described above and stacks them precisely one on top of the other to form the stack of sheets 14.

Prior to stacking, the unloader may coat the sheets 16a-d in a coater 46 with a solder paste (not shown). Soldering foils can be inserted between the metal sheets 16a-d. Alternatively or additionally, the metal sheets 16a-d are solder-plated metal sheets. The stack of laminations 14 can be brazed in a furnace 48 to form an inseparable block.

Taking all the figures of the drawing together, the invention relates in summary to a temperature control device 10 for temperature control of an object 12. The temperature control device 10 has a sheet stack 14 with a plurality of sheets 16a-d that are firmly, in particular non-detachably, connected. A plurality of metal sheets 16a-d have channels 18a-i, in particular laser-cut, so that a medium 32 can flow through the stack of metal sheets 14 through the channels 18a-i. Two channels 18a-i of a plate 16a-d can be separated by a web 20a-d, which can be flowed around via a bypass channel 22a-d in an adjacent plate 16a-d. Alternatively or additionally, a channel 18a-i of a plate 16a-d can be narrowed, with a bypass recess 24a-c being formed in an adjacent plate 16a-d at the constriction 26a-c. An inflow connection and an outflow connection of the temperature control device 10 can be provided on the same side of the temperature control device 10 . The invention relates to white a method 38 for producing such a temperature control device 10.

Reference List

10

temperature control device

12

object

14

stack of sheets

16a-d

sheet

18a-i

channel

20a-d

web

22a-d

bypass channel

24a-c

bypass recess

26a-c

bottleneck

28

reference point

30

reference point system

32

medium

34a, b

rounding

36a, b

Side wall

38

procedure

40

jet cutting device

42

blasting tool

44

unloading device

46

coating device

48

oven

w

Angle between channels and web

i.e

Thickness of sheet metal stack

b

Width of sheet metal stack

I

Length of sheet stack

Claims (15)

Temperature control device (10) with a sheet stack (14), channels (18a-i) being formed in a plurality of superimposed sheets (16a-d) of the sheet stack (14), with channels (18a-i) of different sheets (16a-d) in sections are fluidically connected, so that a medium (32) can be guided through channels (18a-i) of different metal sheets (16a-d). temperature control device claim 1 , in which channels (18a-i) are formed in sections in a single metal sheet (16a-d). temperature control device claim 1 or 2 , in which channels (18a-i) of a sheet (16a-d) are separated by a web (20a-d), wherein a sheet (16a-d) adjacent to the sheet (16a-d) in the region of the web (20a-d) d) has a bypass channel (22a-d), so that the medium (32) can flow around the web (20a-d) in the bypass channel (22a-d). temperature control device claim 3 wherein the web (20a-d) is formed at an angle (w) between 50° and 89° to the direction of flow of the adjacent channels (18a-i) in the sheet metal (16a-d) having the web (20a-d). temperature control device claim 4 , in which the bypass channel (22a-d) and the channels (18a-i) connected to the bypass channel (22a-d) are formed together in the form of a thread in the connection area to the bypass channel (22a-d). Temperature control device according to one of the preceding claims, in which a channel (18a-i) of a metal sheet (16a-d) is narrowed at a narrow point (26a-c) and an adjacent metal sheet (16a-d) in the region of the narrow point (26a-c ) has a bypass recess (24a-c) to ensure an even flow of medium. temperature control device claim 6 in connection with one of the claims 3 until 5 , in which a) a first metal sheet (16a-d) has the channels (18a-i) interrupted by a web (20a-d); b) a second sheet (16a-d) adjacent to the first sheet (16a-d) has the bypass channel (22a-d) in the area of the web (20a-d); c) a third sheet (16a-d) adjacent to the second sheet (16a-d) has the channel (18a-i) with the constriction (26a-c) in the area of the bypass channel (22a-d) and the second sheet (16a -d) has the bypass recess (24a-c) in the area of the constriction (26a-c). Temperature control device according to one of the preceding claims, in which more than 70% of the channels (18a-i) in different metal sheets (16a-d) do not run parallel to one another and/or do not run one above the other. Temperature control device according to one of the preceding claims, in which more than 70% of the channels (18a-i) of the sheet stack (14) are in the form of through-holes with vertical side walls (36a, b). Temperature control device according to one of the preceding claims, in which a channel (18a-i) of a plate (16a-d) at the transition into the channel (18a-i) of an adjacent plate (16a-d) has an elevation in the form of a step and/or Has ramp to the adjacent sheet (16a-d) out. Temperature control device according to one of the preceding claims, in which the temperature control device (10) is designed in the form of a cooling device. Method for producing a temperature control device (10) according to one of the preceding claims, in which the channels (18a-i) are produced in a jet cutting device (40) with a jet tool (42). procedure after claim 12 , in which an unloading device (44) removes the metal sheets (16a-d) after jet cutting from the jet cutting device (40) and stacks them aligned with one another. procedure after Claim 13 , in which the unloading device (44) provides a metal sheet (16a-d) with solder paste before it is stacked on a coating device (46). Procedure according to one of Claims 12 until 14 , in which several sheets (16a-d) of the sheet stack (14) are solder-plated and are connected by heating after stacking.

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