Cooling device for installation into a battery housing, battery housing for accommodating at least one battery component, battery having a battery housing

Abstract

Cooling device (10) for installation into a battery housing, wherein the cooling device (10) has a base plate (20) and a covering plate (30). The at least one connecting surface of the base plate (20) consists of a metal and the at least one connecting surface and a cooling surface (32) of the covering plate (30) that is situated opposite the connecting surface consist of a metal. The connecting surfaces of the base plate (20) and of the covering plate (30) are arranged opposite each other, wherein the connecting surfaces of the base plate (20) and of the covering plate (30) are integrally connected to each other at least in an edge region (40), which is formed circumferentially around the cooling device (10), in such a way that a fluid channel for conducting a cooling fluid is formed between the base plate (20) and the covering plate (30), and wherein the fluid channel is fluidically connected to a feed port (60) and a discharge port (70).

Description

[0001] Cooling device for installation in a battery housing, battery housing for accommodating at least one battery component, battery with a battery housing

[0002] The present invention relates to a cooling device for installation in a battery housing, a battery housing for accommodating at least one battery component and a battery with a battery housing.

[0003] In batteries, for example in traction batteries or storage batteries (power storage devices) for solar systems and / or wind turbines, high charging and discharging currents cause large thermal losses, which lead to heating of battery cells and / or battery modules. To protect the batteries from thermal damage and achieve high efficiency, it is important to keep them within a desired temperature range. Heat must therefore be dissipated from the battery. To ensure sufficient heat dissipation, battery cells are cooled during operation, i.e. during charging and / or discharging. Various types of cooling are currently used for this, such as liquid cooling.

[0004] Furthermore, for the same reasons mentioned above, it may be advantageous to heat the battery cells at low outside temperatures.

[0005] In liquid cooling systems, either active or passive circulation of the heat transfer medium can be used to dissipate the released heat by convection. With passive circulation, the heat transfer medium moves solely through a temperature gradient within the heat transfer medium, whereas with active circulation, the heat transfer medium is actively circulated to dissipate heat from the battery cells.

[0006] In prior art liquid cooling systems, sealing points are often located within the battery housing's receiving volume. This can lead to a short circuit of battery cells located within the receiving volume if coolant leaks from the sealing points and comes into contact with the battery cells.

[0007] To prevent coolant from leaking from the sealing points of such systems, one option is to apply an additional coating to the cooling surfaces in contact with the battery cells, sealing the sealing points with the additional coating. However, this leads to poorer heat transfer between the battery cells and the cooling surfaces in contact with the battery cells due to the poorer heat transfer coefficients of the coated cooling surfaces, thus resulting in less efficient battery cooling.

[0008] Finally, such systems are complex to manufacture due to the additional coatings required for the cooling surfaces and sealing points.

[0009] The present invention is based on the object of providing a cooling device for a battery housing with more efficient cooling and improved protection against leakage of cooling fluid.

[0010] The object underlying the present invention is achieved by a cooling device having the features of claim 1. Advantageous embodiments of the cooling device are described in the claims dependent on claim 1.

[0011] More specifically, the object underlying the present invention is achieved by a cooling device for installation in a battery housing, wherein the cooling device has a base plate and a cover plate, wherein at least one connecting surface of the base plate is made of a metal, and wherein at least one connecting surface and a cooling surface of the cover plate opposite the connecting surface are made of a metal. The connecting surfaces of the base plate and the cover plate are arranged opposite one another, wherein the connecting surfaces of the base plate and the cover plate are materially connected to one another at least in an edge region formed circumferentially around the cooling device in such a way that a fluid channel for conducting a cooling fluid is formed between the base plate and the cover plate, wherein the fluid channel is fluidly connected to an inlet connection and an outlet connection. (Al)

[0012] The cooling device according to the invention has the advantage that, when installed in a battery housing, it enables more efficient cooling of battery components (e.g. battery cells and / or battery modules) mounted in the battery housing. Furthermore, the cooling device according to the invention has the advantage that, due to the material-fit connection of the connecting surfaces of the base plate and the cover plate, it has improved protection against leakage of cooling fluid. Thus, when the cooling device according to the invention is installed in a battery housing in which battery cells and / or battery modules are mounted, the battery cells and / or the battery modules are protected from the cooling fluid, so that the battery has improved protection against short circuits. The cooling device is designed to be installed in a battery housing orin a battery to be brought into direct contact with at least one battery cell and / or with at least one battery module, so that the battery cell and / or the battery module can be cooled by means of contact cooling.

[0013] Preferably, the cooling surface of the cover plate, in the installed position of the cooling device in a battery housing, faces the battery components mounted in the battery housing.

[0014] Preferably, the entire base plate is made of metal. The base plate is further preferably made of aluminum and / or copper and / or steel and / or stainless steel.

[0015] Preferably, the entire cover plate is made of metal. The cover plate is further preferably made of aluminum and / or copper and / or steel and / or stainless steel.

[0016] A cooling device designed in this way has the advantage that, when installed in a battery housing, it enables even more efficient cooling of battery components mounted in the battery housing (e.g. battery cells and / or battery modules).

[0017] Preferably, the metal of the connecting surface of the base plate is the same metal as that of the connecting surface of the cover plate. With a corresponding design of the cooling device, a material-to-material connection between the base plate and the cover plate is made easier, for example by means of welding. The connecting surface of the base plate can also be referred to as the inner surface of the base plate. The connecting surface of the cover plate can also be referred to as the inner surface of the cover plate. The cooling surface of the cover plate can also be referred to as the outer surface or the standing surface of the cover plate.

[0018] The cooling device is particularly preferably manufactured using the roll-bonding process. This has the advantage that the fluid channel can be introduced into the cooling device simply and with an easily determined geometry during manufacture. In the roll-bonding process, two metal sheets are joined together by rolling at high pressure, i.e. pressure-joined, with certain parts of the sheet that will later form the cooling fluid channel being left out of the joining process by treating these areas with release agents, for example by printing, before rolling. The joined areas are bonded to one another by contact welding during the roll-bonding process. After joining, unconnected areas between the two metal sheets are inflated using compressed air to create the cooling fluid channels.

[0019] The cover plate is preferably flat. In particular, the cooling surface of the cover plate is flat. A cooling device designed in this way has the advantage that, when installed in a battery housing, it enables even more efficient cooling of battery components mounted in the battery housing. Due to the flat contact surface between the cooling surface of the cover plate and the battery components mounted in the battery housing, improved contact cooling can be achieved.

[0020] A flat cover plate and / or a flat cooling surface essentially has / have no elevations, in particular no elevations due to the fluid channel formed between the base plate and the cover plate.

[0021] The flat cooling surface of the cover plate can be created, for example, by pressing the cover plate with the later cooling surface against a counter bearing during the inflation process using the roll-bond method, which prevents bulging through the fluid channel on the later cooling surface.

[0022] The peripheral edge region surrounding the cooling device can be discontinuous. In other words, the peripheral edge region surrounding the cooling device can be formed from a plurality of spaced-apart edge region sections that are arranged circumferentially around the cooling device. A cooling device configured in this way has the advantage that it can be manufactured more easily.

[0023] Alternatively, the peripheral edge region formed around the cooling device can be formed as a continuous edge region.

[0024] The peripheral edge region formed around the cooling device preferably has a thickness in a range from 0.3 mm to 3 mm, preferably in a range from 0.5 mm to 2.5 mm and particularly preferably in a range from 0.7 mm to 2 mm.

[0025] The cooling device is preferably designed such that the edge region surrounding the cooling device has an adhesion promoter layer on an underside of the base plate opposite the connecting surface of the base plate, and / or the edge region surrounding the cooling device has an adhesion promoter layer on the cooling surface of the cover plate opposite the connecting surface of the cover plate. A cooling device designed in this way has the advantage that when the cooling device is used in a battery housing, the edge region surrounding the cooling device, which is enclosed by material forming a wall of the battery housing, is better connected to the material of the wall of the battery housing. As a result, the cooling device in turn has even better protection against leakage of cooling fluid.

[0026] Preferably, the cooling device is designed such that the cooling device has at least one positioning device connected to the base plate, which protrudes from an underside of the base plate opposite the connecting surface of the base plate. (A2)

[0027] The correspondingly designed cooling device has the advantage that it can be positioned in a simplified manner, for example, in an injection mold with increased positioning accuracy. Thus, the correspondingly designed cooling device can be easily overmolded with a battery housing component (for example, a battery housing shell). In particular, it is thus easier to position the cooling device in an injection mold so precisely that the edge region surrounding the cooling device is enclosed by the material forming the battery housing component (for example, a battery housing shell).

[0028] Furthermore, the correspondingly designed cooling device has the advantage that it can be used when installed in a battery housing shell or in a battery housing for positioning two battery housings stacked on top of each other.

[0029] Preferably, the cooling device has at least two positioning devices connected to the base plate, which protrude from the underside of the base plate opposite the connecting surface of the base plate. The correspondingly designed cooling device can be positioned in an injection mold with improved accuracy.

[0030] Preferably, the cooling device is designed such that the at least one positioning device is designed as a positioning pin. (A3)

[0031] A cooling device designed in this way has the advantage that it can be positioned in an injection mold with increased positioning accuracy in an even simpler manner. Thus, the correspondingly designed cooling device can be overmolded with a battery housing component (for example, a battery housing shell) in an even simpler manner. In particular, it is thus possible, in an even simpler manner, to position the cooling device in an injection mold with such precision that the edge region surrounding the cooling device is enclosed by the material forming the battery housing component (for example, a battery housing shell).

[0032] The at least one positioning pin is preferably cylindrical.

[0033] The at least one positioning pin is preferably designed to taper toward an end region projecting from the underside. The correspondingly designed cooling device can again be positioned in an injection mold with improved accuracy.

[0034] Preferably, the cooling device is designed such that an underside of the base plate, which is arranged opposite the connecting surface of the base plate, is curved to form the fluid channel. (A4) A cooling device designed in this way has the advantage that, when installed in a battery housing, an increased cooling capacity of the cooling device is possible.

[0035] The feature that the underside of the base plate is curved downwards can also be expressed as the underside of the base plate having at least one elevation. In other words, the underside of the base plate is preferably not flat.

[0036] The at least one positioning device connected to the base plate preferably protrudes further from the underside of the base plate than the at least one elevation of the base plate. A cooling device designed in this way has the advantage that it can be positioned more effectively in an injection mold despite the base plate not having a flat underside.

[0037] Preferably, the cooling device is designed such that the fluid channel is formed in a meandering or spiral shape between the base plate and the cover plate. (A5)

[0038] A cooling device designed in this way has the advantage that, when installed in a battery housing, even more efficient cooling of battery components arranged in the battery housing is possible due to the longer cooling path of the fluid channel.

[0039] Preferably, the cooling device is designed such that the connecting surfaces of the base plate and the cover plate are welded together. (A6)

[0040] A cooling device designed in this way has the advantage that it provides even better protection against leakage of cooling fluid. Preferably, the connecting surfaces of the base plate and the

[0041] The cover plate is welded together by contact welding. A cooling device designed in this way has the advantage that it can be manufactured in a simplified manner and, in particular, in a single production step.

[0042] Alternatively or additionally, the connecting surfaces of the base plate and the cover plate are welded together by laser welding. A cooling device designed in this way has the advantage of providing even better protection against cooling fluid leakage.

[0043] Contact welding is familiar to those skilled in the art. Contact welding is a solid-state welding process in which the joining takes place at the interface between the two components to be welded without melting them.

[0044] Preferably, the cooling device is designed such that the peripheral region surrounding the cooling device is angled at least in sections relative to the cooling surface of the cover plate. (A7)

[0045] A cooling device designed in this way has the advantage that it offers even better protection against the leakage of cooling fluid. Because the edge region is angled relative to the cooling surface, the cooling device has, in addition to the material-to-material connection between the connecting surface of the base plate and the connecting surface of the cover plate, additional protection against the leakage of cooling fluid due to the shape of the edge region. Furthermore, because the edge region of the cooling device is angled, the edge region can be better enclosed by the material that forms a wall of the battery housing. Finally, the bending and torsional rigidity of the cooling device is improved by the edge region being angled relative to the cooling surface.

[0046] The angled edge region surrounding the cooling device can be angled relative to the cooling surface by bending the edge region. In other words, the angled edge region can be monolithically connected to the cooling device. A cooling device designed in this way has the advantage that the cooling device can be manufactured even more simply.

[0047] Preferably, the cooling device is designed such that the peripheral region surrounding the cooling device has through openings. (A8)

[0048] The correspondingly designed cooling device has the advantage that it can be overmolded with a battery housing component (for example, a battery housing shell) in a further simplified manner. In particular, material forming the battery housing component (for example, a battery housing shell) can flow through the through-openings of the edge region while the cooling device is being overmolded. This allows an improved connection between the cooling device and a battery housing component to be achieved.

[0049] A free cross-section of the through-openings can be circular, rectangular, slot-shaped or diamond-shaped. The free cross-section can have a diameter which is as large as the thickness of a wall of a battery housing to which the cooling device can be connected. The through-openings are preferably equidistant from one another. The distance between two through-openings is preferably 2.5 times the thickness of a wall of a battery housing to which the cooling device is connected. A cooling device designed in this way has the advantage that, when installed in a battery housing, it is connected to the battery housing in an even better way. The cooling device therefore has even better protection against leakage of cooling fluid.

[0050] Preferably, the cooling device is designed such that a first hollow connection piece is inserted into the inlet connection, and / or that a second hollow connection piece is inserted into the outlet connection. (A9)

[0051] A cooling device designed in this way has the advantage of providing improved protection against cooling fluid leakage. A cooling fluid can be fed into the fluid channel through the inlet connection via the first hollow connection piece and out again through the outlet connection via the second hollow connection piece.

[0052] The first and / or the second connecting hollow socket can have a hollow cylindrical base body.

[0053] Preferably, the cooling device is designed such that the first hollow connection piece is soldered to the inlet connection and / or the second hollow connection piece is soldered to the outlet connection. (A10)

[0054] A cooling device designed in this way has the advantage that it provides even better protection against the leakage of cooling fluid. Preferably, the cooling device is designed such that the first hollow connecting piece and / or the second hollow connecting piece has / have a circumferential collar and / or a circumferential groove. (Al l)

[0055] A cooling device designed in this way has the advantage that a simplified tolerance compensation between the inlet connection and the first hollow connection piece and / or between the outlet connection and the second hollow connection piece is possible when the cooling device is positioned in an injection mold.

[0056] The first connecting hollow socket and / or the second connecting hollow socket can have a circumferential shoulder, wherein the circumferential collar is arranged between the circumferential groove and the circumferential shoulder.

[0057] The first hollow connection piece is preferably inserted into the inlet connection of the cooling device in such a way that the circumferential collar and / or the circumferential shoulder of the first hollow connection piece is arranged at a distance from the inlet connection. In other words, the first hollow connection piece is inserted into the inlet connection in such a way that a free space is formed between the inlet connection and the circumferential collar and / or the circumferential shoulder. A cooling device designed in this way has the advantage that a further simplified tolerance compensation between the inlet connection and the first hollow connection piece is possible.

[0058] Furthermore, a cooling device designed in this way has the advantage that, when installed in a battery housing, a solder joint between the first hollow connection piece and the inlet connection can be completely enclosed by the material of the battery housing. This allows a cooling device designed in this way to provide even better protection against leakage of cooling fluid from the cooling device.

[0059] The second hollow connection piece is preferably inserted into the drain connection of the cooling device in such a way that the circumferential collar and / or the circumferential shoulder of the second hollow connection piece is arranged at a distance from the drain connection. In other words, the second hollow connection piece is inserted into the drain connection in such a way that a free space is formed between the drain connection and the circumferential collar and / or the circumferential shoulder. A cooling device designed in this way has the advantage that a further simplified tolerance compensation between the drain connection and the second hollow connection piece is possible.

[0060] Furthermore, a cooling device designed in this way has the advantage that, when installed in a battery housing, a soldering point between the second hollow connection piece and the drain connection can be completely enclosed by the material of the battery housing. As a result, a cooling device designed in this way enables even better protection against cooling fluid leaking from the cooling device. Furthermore, a cooling device designed in this way offers improved protection against environmental media at the soldering point and thus improved corrosion protection.

[0061] The free space between the circumferential shoulder of the first hollow connection piece and the inlet connection and / or the free space between the circumferential shoulder of the second hollow connection piece and the outlet connection can also be referred to as

[0062] Groove. The present invention is also based on the object of providing a battery housing for accommodating at least one battery component, which enables more efficient cooling of battery components mounted in the battery housing and improved protection against leakage of cooling fluid.

[0063] This object underlying the present invention is achieved by a battery housing for accommodating at least one battery component having the features of claim 12. Advantageous embodiments are described in the claims dependent on claim 12.

[0064] More specifically, the object underlying the present invention is achieved by a battery housing for accommodating at least one battery component, wherein the battery housing has a wall partially enclosing a receiving volume. The battery housing further has a cooling device as described above, wherein the cooling device is connected to the battery housing in such a way that the entire edge region of the cooling device is arranged within the wall of the battery housing, and wherein the cooling device forms the housing base of the battery housing. (A12)

[0065] The battery housing according to the invention has the advantage that it enables more efficient cooling of battery components mounted in the battery housing (e.g. battery cells and / or battery modules). Furthermore, the battery housing according to the invention has the advantage that it has improved protection against leakage of cooling fluid due to the edge region arranged within the wall of the battery housing. The connecting surfaces of the edge region formed around the cooling device are thus completely enclosed by the wall of the battery housing. In this way, battery cells and / or battery modules mounted in the battery housing are in turn protected from the cooling fluid, so that the battery has improved protection against short circuits.

[0066] Preferably, a wall of the battery housing comprises a plastic or is formed from a plastic. The plastic of the wall can comprise a thermoplastic and / or a thermosetting plastic or be formed as such.

[0067] The plastic of the wall can be polypropylene (PP) or polyamide (PA) or can be designed as such.

[0068] The plastic of the wall can be designed as a fiber-reinforced plastic. The fiber portion can have a volume fraction of the total volume of the fiber-reinforced plastic in a range from 10% to 60%, preferably in a range from 20% to 50% and particularly preferably in a range from 30% to 40%. The fiber portion can have a volume fraction of the total volume of the fiber-reinforced plastic in a range from 10% to 90%, preferably in a range from 20% to 80% and particularly preferably in a range from 40% to 60%. The fibers of the fiber-reinforced plastic can be designed as glass fibers or as carbon fibers. A battery housing designed in this way has the advantage that it has increased mechanical stability.Furthermore, a battery housing designed in this way has the advantage that the shrinkage during cooling of the plastic is reduced, so that the through openings in the edge region of the cooling device are better filled with fiber-reinforced plastic material.

[0069] The battery housing is preferably designed such that an insert for passing a cable through is arranged in the wall of the battery housing. The battery housing is preferably designed such that the cooling device has a first hollow connection piece and / or a second hollow connection piece, wherein the first hollow connection piece is inserted into the inlet connection and / or the second hollow connection piece is inserted into the outlet connection. The first hollow connection piece is soldered to the inlet connection and / or the second hollow connection piece is soldered to the outlet connection. A first soldering point between the first hollow connection piece and the inlet connection is completely surrounded by material of the wall of the battery housing and / or a second soldering point between the second hollow connection piece and the outlet connection is completely surrounded by material of the battery housing. (A13)

[0070] A battery housing designed in this way has the advantage that the battery housing has even better protection against leakage of cooling fluid. The first and / or the second soldering point is / are protected by the material of the battery housing from environmental influences, in particular from corrosion. Because the first soldering point and / or the second soldering point is / are completely surrounded by material of the battery housing, even better protection against leakage of cooling fluid is provided, since all sealing points of the cooling device are therefore completely surrounded by material of the battery housing. Battery cells and / or battery modules mounted in the battery housing are therefore even better protected against the cooling fluid, so that the battery has even better protection against short circuits.

[0071] The first soldering point and / or the second soldering point is / are preferably completely surrounded by material of the battery housing such that a free space between the circumferential shoulder of the first hollow connection piece and the inlet connection and / or a free space between the circumferential shoulder of the second hollow connection piece and the outlet connection is / are completely filled with material of the wall of the battery housing. A battery housing designed in this way has the advantage of enabling even better protection against leakage of cooling fluid.

[0072] The first soldering point and / or the second soldering point is / are preferably completely surrounded by material of the battery housing such that a free space between the circumferential collar of the first hollow connection piece and the inlet connection and / or a free space between the circumferential collar of the second hollow connection piece and the outlet connection is / are completely filled with material of the wall of the battery housing. A battery housing designed in this way has the advantage of enabling even better protection against leakage of cooling fluid.

[0073] Preferably, the battery housing is designed such that the edge region of the cooling device is penetrated at least in sections by material of the wall of the battery housing.

[0074] (A14 )

[0075] A battery housing designed in this way has the advantage of achieving an improved connection between the cooling device and the battery housing. This, in turn, provides improved protection against leakage of cooling fluid.

[0076] The battery housing is preferably designed such that the edge region of the cooling device is penetrated by material of the battery housing in the region of through-openings in the edge region. In other words, the cooling device and the battery housing form a one-piece component. A battery housing designed in this way has the advantage of achieving a further improved connection between the cooling device and the battery housing and, at the same time, achieving further improved protection against leakage of cooling fluid.

[0077] The battery housing can have a battery housing cover, wherein the battery housing cover has a receiving device suitable for receiving a positioning device connected to the base plate of the cooling device of another battery housing. A battery housing designed in this way has the advantage that the battery housing is stackable in the vertical direction. This in turn allows a battery having several battery housings described above to be flexibly adapted with regard to battery storage capacity and geometric space requirements.

[0078] The battery housing can be connected to a fluid supply device (for example in the form of a pump) arranged outside the receiving volume of the battery housing. In particular, the fluid channel of the cooling device of the battery housing can be fluidly connected to the fluid supply device via the inlet connection and the first hollow connection piece, as well as via the outlet connection and the second hollow connection piece. Preferably, several fluid channels of different cooling devices are fluidly connected to one another via the fluid supply device.

[0079] The present invention is also based on the object of providing a battery which enables improved cooling and improved protection against leakage of cooling fluid.

[0080] This object underlying the present invention is achieved by a battery comprising a battery housing as described above, wherein at least one battery component is arranged in the receiving volume of the battery housing and is in contact with the cooling surface of the cooling device. (A15)

[0081] Further advantages, details and features of the invention will become apparent from the following exemplary embodiments. These show in detail:

[0082] Figure 1: a perspective view of a cooling device according to a first embodiment;

[0083] Figure 2: a perspective view of the connection area between a second hollow connection piece and a drain connection of the cooling device of the first embodiment;

[0084] Figure 3: a perspective view of a cooling device according to a second embodiment;

[0085] Figure 4: a perspective view of a battery housing according to the invention;

[0086] Figure 5: a schematic cross-sectional view of the connecting area between an edge area of ​​a cooling device installed in a battery housing and a wall of the battery housing; and

[0087] Figure 6: a schematic cross-sectional view of the connection area between a first hollow connection piece and an inlet connection of a cooling device installed in a battery housing.

[0088] In the following description, identical reference symbols designate identical components or identical features, so that a description of a component made with reference to one figure also applies to the other figures, thus avoiding repetitive description. Furthermore, individual features described in connection with one embodiment can also be used separately in other embodiments.

[0089] Figure 1 shows a cooling device 10 for installation in a battery housing 100 (not shown in Figure 1) according to a first embodiment. The cooling device 10 has a base plate 20 and a cover plate 30, wherein a connecting surface 21 (not shown) of the base plate 20 and a connecting surface 31 (not shown) of the cover plate 30 are arranged opposite one another and are materially connected to one another at least in an edge region 40 formed circumferentially around the cooling device 10 in such a way that a fluid channel 50 (not shown in Figure 1) for conducting a cooling fluid is formed between the base plate 20 and the cover plate 30. The fluid channel 50 (not shown) is fluidly connected to an inlet connection 60 and an outlet connection 70.

[0090] The cover plate 30 has a cooling surface 32 arranged opposite the connecting surface 31 (not shown). The cooling surface 32 of the cover plate 30 is flat.

[0091] The edge region 40 extending circumferentially around the cooling device 10 is angled in sections relative to the cooling surface 32 of the cover plate 30. The edge region 40 and the cooling surface 32 of the cover plate 30 form an angle of 90° with each other. The edge region 40 is monolithically connected to the cooling device 10 and is produced by bending the cooling device 10.

[0092] In the illustrated embodiment, the edge region 40 extending circumferentially around the cooling device 10 is discontinuous. In other words, the edge region 40 has four edge region sections extending circumferentially around the cooling device 10.

[0093] The peripheral area arranged around the cooling device 10

[0094] 40 also has through openings 41. The through openings 41 are circular. The through openings

[0095] 41 of each edge region section of the interrupted edge region 40 formed circumferentially around the cooling device 10 are equidistant from one another.

[0096] The cooling device 10 has a first hollow connection piece

[0097] 61, wherein the first hollow connection piece 61 is inserted into the inlet connection 60. Furthermore, the cooling device 10 has a second hollow connection piece 71, wherein the second hollow connection piece 71 is inserted into the outlet connection 70. A cooling fluid can be guided through the first hollow connection piece 61 through the inlet connection 60 into the fluid channel 50 and can be guided out again through the outlet connection 70 through the second hollow connection piece 71.

[0098] The first hollow connection piece 61 and the second hollow connection piece 71 have a hollow cylindrical base body.

[0099] The first hollow connection piece 61 has a circumferential collar

[0100] 62 and a circumferential groove 63 and the second connecting hollow socket 71 has a circumferential collar 72 and a circumferential groove 73.

[0101] Figure 2 shows the connection area between the second hollow connection piece 71 and the drain connection 70 of the cooling device 10 shown in Figure 1. The second hollow connection piece 71 is inserted into the drain connection 70 such that the circumferential collar 72 is arranged at a distance from the drain connection 70. The first hollow connection piece 61, not shown in Figure 2, is arranged in the inlet connection 60 such that the circumferential collar 62 is arranged at a distance from the inlet connection 60.

[0102] Figure 3 shows a cooling device 10 for installation in a battery housing 100 (not shown) according to a second embodiment. An underside 22 of the base plate 20, arranged opposite the connecting surface 21 (not shown) of the base plate 20, is curved downwards, wherein the underside 22 of the base plate 20 is curved downwards by the fluid channel 50 formed between the base plate 20 and the cover plate 30. In other words, the underside 22 of the base plate 20 has an elevation and is not flat.

[0103] The fluid channel 50 is formed in a meandering shape between the base plate 20 and the cover plate 30.

[0104] Furthermore, the cooling device 10 has two positioning devices 80 connected to the base plate 10, which protrude from the underside 22 of the base plate 20. The positioning devices 80 are designed as positioning pins 81, wherein the positioning pins 81 are each cylindrical and each conically converge towards an end region 82 projecting away from the underside 22.

[0105] The two positioning pins 81 are arranged at a distance from one another along a longitudinal extent of the cooling device 10. Along a width extent of the cooling device 10, the two positioning pins 81 are not spaced from one another. The cooling device 10 shown in Figures 1 and 2 can also be designed like the cooling device 10 shown in Figure 3.

[0106] Figure 4 shows a battery housing 100 for receiving at least one battery component. The battery housing 100 has a wall 120 partially enclosing a receiving volume 110 and a cooling device 10 according to the first or second embodiments described above. The cooling device 10 is connected to the battery housing 100 such that the entire edge region 40 of the cooling device 10 is arranged within the wall 120 of the battery housing 100, wherein the cooling device 10 forms the housing base 130 of the battery housing 100. The battery housing 100 and the cooling device 10 form a one-piece component.

[0107] Figure 5 shows a schematic cross-sectional view of the connecting region between an edge region 40 of a cooling device 10 installed in a battery housing 100 and a wall 120 of the battery housing 100. The cooling device 10 forms the housing base 130 of the battery housing 100.

[0108] The connecting surface 21 of the base plate 20 is arranged opposite the connecting surface 31 of the cover plate 30 and is connected thereto. The edge region 40, which is angled relative to the cooling surface 32 of the cover plate 30, is arranged entirely within the wall 120 of the battery housing 100. The edge region 40 of the cooling device 10 is penetrated by material of the wall 120 of the battery housing 100 in the region of the through openings 41 of the edge region 40.

[0109] Figure 6 shows a schematic cross-sectional view of the connection area between the first hollow connection piece 61 and the inlet connection 60 of a cooling device 10 installed in a battery housing 100. The first hollow connection piece 61 has a circumferential shoulder 64, wherein the circumferential collar 62 is arranged between the circumferential shoulder 64 and the circumferential groove 63.

[0110] The first hollow connection piece 61 is inserted into the inlet connection 60 of the cooling device 10 in such a way that the circumferential collar 62 and the circumferential shoulder 64 of the first hollow connection piece 61 are arranged at a distance from the inlet connection 60. In other words, the first hollow connection piece 61 is inserted into the inlet connection 60 of the cooling device 10 in such a way that a free space 150 is formed between the circumferential collar 62 of the first hollow connection piece 61 and the inlet connection 60 of the cooling device 10, and a free space 160 is formed between the circumferential shoulder 64 of the first hollow connection piece 61 and the inlet connection 60 of the cooling device 10. The free space 160 between the circumferential shoulder 64 of the first hollow connection piece 61 and the inlet connection 60 of the cooling device 10 can also be referred to as a groove 160.

[0111] The free space 150 between the circumferential collar 62 of the first hollow connection piece 61 and the inlet connection 60 of the cooling device 10 and the free space 160 between the circumferential shoulder 64 of the first hollow connection piece 61 and the inlet connection 60 of the cooling device 10 are completely filled with material of the battery housing 100.

[0112] The first hollow connection piece 61 is soldered to the inlet connection 60 of the cooling device 10. A first soldering point 140 between the first hollow connection piece 61 and the inlet connection 60 of the cooling device 10 is completely surrounded by material of the battery housing 100. List of reference symbols

[0113] 10 Cooling device

[0114] 20 base plate

[0115] 21 Connecting surface (of the base plate)

[0116] 22 Bottom (of the base plate)

[0117] 30 cover plate

[0118] 31 Connecting surface (of the cover plate)

[0119] 32 Cooling surface (of the cover plate)

[0120] 40 Marginal area

[0121] 41 through openings (of the edge area)

[0122] 50 fluid channel

[0123] 60 inlet connection

[0124] 61 First hollow connection piece

[0125] 62 Circumferential collar (of the first connecting hollow socket)

[0126] 63 Circumferential groove (of the first hollow connection piece)

[0127] 64 Circumferential shoulder (of the first connecting hollow socket)

[0128] 70 Expiration at the end

[0129] 71 Second hollow connection piece

[0130] 72 Circumferential collar (of the second hollow connection socket)

[0131] 73 Circumferential groove (of the second connecting hollow socket)

[0132] 80 Positioning device

[0133] 81 Positioning pin

[0134] 82 End area (of the positioning pin)

[0135] 100 battery cases

[0136] 110 Recording volume

[0137] 120 wall

[0138] 130 Case back

[0139] 140 First solder joint

[0140] 150 free space (between the circumferential collar and the inlet connection)

[0141] 160 free space, groove (between the surrounding shoulder and the inlet connection)

Claims

Patent claims Cooling device (10) for installation in a battery housing (100), the cooling device (10) having the following features: the cooling device (10) has a base plate (20) and a cover plate (30); at least one connecting surface (21) of the base plate (20) is made of a metal; at least one connecting surface (31) and a cooling surface (32) of the cover plate (30) opposite the connecting surface (31) are made of a metal; the connecting surfaces (21, 31) of the base plate (20) and the cover plate (30) are arranged opposite one another; the connecting surfaces (21, 31) of the base plate (20) and the cover plate (30) are integrally connected to one another at least in an edge region (40) extending circumferentially around the cooling device (10) in such a way that a fluid channel (50) for conducting a cooling fluid is formed between the base plate (20) and the cover plate (30);and the fluid channel (50) is fluidly connected to an inlet connection (60) and an outlet connection (70); 2. Cooling device (10) according to claim 1, characterized in that the cooling device (10) has at least one positioning device (80) connected to the base plate (20) which protrudes from an underside (22) of the base plate (20) opposite the connecting surface (21) of the base plate (20).

3. Cooling device (10) according to claim 2, characterized in that the at least one positioning device (80) is designed as a positioning pin (81).

4. Cooling device (10) according to one of the preceding claims, characterized in that an underside (22) of the base plate (20) arranged opposite the connecting surface (21) of the base plate (20) is curved to form the fluid channel (50).

5. Cooling device (10) according to one of the preceding claims, characterized in that the fluid channel (50) is formed in a meandering or spiral shape between the base plate (20) and the cover plate (30).

6. Cooling device (10) according to one of the preceding claims, characterized in that the connecting surfaces (21, 31) of the base plate (20) and the cover plate (30) are welded together.

7. Cooling device (10) according to one of the preceding claims, characterized in that the edge region (40) surrounding the cooling device (10) is angled at least in sections relative to the cooling surface (32) of the cover plate (30).

8. Cooling device (10) according to one of the preceding claims, characterized in that the edge region (40) surrounding the cooling device (10) has through openings (41).

9. Cooling device (10) according to one of the preceding claims, characterized by the following features: a first connecting piece (61) is inserted into the inlet connection (60), and / or a second hollow connection piece (71) is inserted into the drain connection (70).

10. Cooling device (10) according to claim 9, characterized in that the first hollow connection piece (61) is soldered to the inlet connection (60) and / or the second hollow connection piece (71) is soldered to the outlet connection (70).

11. Cooling device (10) according to claim 9 or 10, characterized in that the first connecting hollow socket (61) and / or the second connecting hollow socket (71) has / have a circumferential collar (62, 72) and / or a circumferential groove (63, 73).

12. Battery housing (100) for receiving at least one battery component, the battery housing (100) having the following features: the battery housing (100) has a wall (120) partially enclosing a receiving volume (110); the battery housing (100) has a cooling device (10) according to one of claims 1 to 11; the cooling device (10) is connected to the battery housing (100) in such a way that the entire edge region (40) of the cooling device (10) is arranged within the wall (120) of the battery housing (100); and the cooling device (10) forms the housing base (130) of the battery housing (100).

13. Battery housing (100) according to claim 12, characterized by the following features: the battery housing (100) has a cooling device (10) according to claim 10; a first soldering point (140) between the first hollow connection piece (61) and the inlet connection (60) is completely surrounded by material of the battery housing (100), and / or a second soldering point between the second hollow connection piece (71) and the drain connection (70) is completely surrounded by material of the wall (120) of the battery housing (100).

14. Battery housing (100) according to claim 12 or claim 13, characterized in that the edge region (40) of the cooling device (10) is penetrated at least in sections by material of the wall (120) of the battery housing (100).

15. A battery comprising at least one battery component, the battery having the following features: the battery has a battery housing (100) according to one of claims 12 to 14; and the at least one battery component is arranged in the receiving volume (110) of the battery housing (100) and is in contact with the cooling surface (32) of the cooling device (10).

Images