Battery housing shell, battery housing comprising a battery housing shell, and battery comprising a battery housing shell

Abstract

The present invention relates to a battery housing shell (10) for receiving at least one battery component in an receiving volume (1) that is at least partially defined by the battery housing shell (10), wherein the battery housing shell (10) has a channel base surface (11) and a first connection surface (21) that is at least indirectly connected to the channel base surface (11). The battery housing shell (10) has a cover layer (30) that is fluid-tightly connected to the first connection surface (21) such that a channel volume (41) is formed which is defined by the channel base surface (11) and the cover layer (30). A coolant inlet (50) of the battery housing shell (10) and a coolant outlet (60) of the battery housing shell (10) are fluidically connected to the channel volume (41), thereby forming a coolant channel (40), and a cooling surface (31) of the cover layer (30), which cooling surface faces away from the channel volume (41), faces the receiving volume (1) and is designed to contact the battery component. The invention also relates to a battery housing comprising the battery housing shell (10) and to a battery comprising the battery housing shell (10).

Description

[0001] Battery housing shell, battery housing with a battery housing shell and battery with a battery housing shell

[0002] The present invention relates to a battery housing shell, a battery housing with a battery housing shell and a battery with a battery housing shell.

[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 the heat from the battery cells. Heat exchangers, such as thermally conductive cooling plates in direct contact with the battery cells or battery modules, are used to transfer the heat released by the battery cells or battery modules.

[0006] State-of-the-art liquid cooling systems primarily use metallic cooling plates with cooling fluid channels for transporting the heat transfer medium. Such cooling plates typically consist of two interconnected metallic plates.

[0007] Such systems have the disadvantage that the distribution of the heat transfer medium is limited by the cooling fluid channels of the metallic cooling plates, which can lead to inhomogeneous heat transfer between the battery cells or the battery modules and the cooling plates. In areas where the cooling fluid channel is located, the heat transfer between a battery cell and the cooling plate can, for example, be greater than in areas of the cooling plate where no cooling fluid channel is located. On the other hand, such systems are very complex to manufacture due to the necessary multi-material connections, in particular the connection between metal and plastic.

[0008] The present invention is based on the object of providing a battery housing shell with a more homogeneous heat transfer of heat from battery cells or battery modules arranged in the battery housing shell and, at the same time, a reduced manufacturing complexity.

[0009] The object underlying the present invention is achieved by a battery housing having the features of claim 1. Advantageous embodiments of the battery housing are described in the claims dependent on claim 1.

[0010] More specifically, the problem underlying the present invention is solved by a battery housing shell for accommodating at least one battery component in a receiving volume that is at least partially delimited by the battery housing shell. The battery housing shell has a channel bottom surface and a first connecting surface that is at least indirectly connected to the channel bottom surface. The battery housing shell has a cover layer that is fluid-tightly connected to the first connecting surface, so that a channel volume delimited by the channel bottom surface and the cover layer is formed. A cooling fluid inlet of the battery housing shell and a cooling fluid outlet of the battery housing shell are fluidly connected to the channel volume to form a cooling fluid channel, wherein a cooling surface of the cover layer facing away from the channel volume faces the receiving volume and is designed to make contact with the battery component.

[0011] The battery housing shell according to the invention has the advantage that a cooling fluid flowing through the cooling fluid channel can substantially undermine the entire receiving surface of the receiving volume formed by the cooling surface of the cover layer. This allows for more homogeneous heat transfer between the at least one battery component arranged in the receiving volume of the battery housing shell and the cooling fluid flowing through the cooling fluid channel, which in turn allows for a more homogeneous temperature distribution in the receiving volume of the battery housing.

[0012] The battery component can be at least one battery cell and / or at least one battery module. The cover layer can comprise a plastic, in particular a thermoplastic. The cover layer can be formed as a plastic sheet.

[0013] Furthermore, the cover layer can be designed as a multi-layer composite component. For example, the cover layer can have a connecting layer made of a thermoplastic (for example polypropylene) and a metal layer (for example an aluminum layer), wherein the connecting layer is connected to the first connecting surface, and wherein the metal layer has the cooling surface. The connecting layer preferably has a thickness of between 20 pm and 100 pm, preferably between 30 pm and 70 pm, more preferably between 40 pm and 50 pm, and particularly preferably 45 pm. The metal layer preferably has a thickness of between 50 pm and 200 pm, preferably between 70 pm and 170 pm, more preferably between 90 pm and 150 pm, and particularly preferably 120 pm.

[0014] The cover layer preferably has a connecting layer, a metal layer and a contacting layer. The connecting layer preferably has a thermoplastic (for example polypropylene). The metal layer is preferably formed as an aluminum layer. The contacting layer preferably has a thermoplastic (for example polyamide). The connecting layer is connected to the first connecting surface. The metal layer is arranged in a sandwich manner between the connecting layer and the contacting layer. The contacting layer has the cooling surface of the cover layer. The connecting layer preferably has a thickness of between 20 pm and 100 pm, preferably between 30 pm and 70 pm, more preferably between 40 pm and 50 pm, and particularly preferably 45 pm.The metal layer preferably has a thickness between 50 pm and 200 pm, preferably between 70 pm and 170 pm, more preferably between 90 pm and 150 pm, and particularly preferably 120 pm. The contacting layer preferably has a thickness between 5 pm and 40 gm, preferably between 10 gm and 30 gm, more preferably between 15 gm and 25 gm, and particularly preferably 20 gm.

[0015] The cover layer can be firmly bonded to the first connecting surface of the connecting wall. For example, the cover layer can be welded to the first connecting surface of the connecting wall.

[0016] The first connecting surface can be surrounded in its longitudinal extent by at least one, preferably two depressions which serve to absorb welding or melt expulsion when the cover layer is connected to the first connecting surface.

[0017] The channel volume has a height extension extending from the channel bottom surface to an inner surface of the cover layer facing the channel volume, which can also be referred to as the channel boundary surface, of the cover layer.

[0018] The channel boundary surface of the cover layer is arranged opposite the cooling surface of the cover layer.

[0019] The channel volume further has a width extension oriented orthogonally to the height extension of the channel volume and a length extension oriented orthogonally to the height extension and the width extension.

[0020] The length of the channel volume can be significantly greater than the height and width of the channel volume. The width of the channel volume can be significantly greater than the height of the channel volume. An underside of the battery housing shell arranged opposite the channel bottom surface can delimit the battery housing shell to the outside. In the installed position of the battery housing shell, for example in a battery having the battery housing shell, the underside of the battery housing shell can form an outer wall, for example the outer surface of a bottom of the battery housing shell.

[0021] The cooling surface of the cover layer is preferably flat or is shaped such that it fits snugly against the underside of the at least one battery component.

[0022] Preferably, the battery housing shell has a circumferential connecting wall which is at least indirectly connected to the channel bottom surface and which extends in the direction of the receiving volume, wherein the end face of the connecting wall forms the first connecting surface, and wherein the channel volume is delimited by the channel bottom surface, the connecting wall and the cover layer.

[0023] The correspondingly designed battery housing shell has the advantage that the geometric design of the cover layer can be simplified.

[0024] The connecting wall and the channel floor surface can be monolithically connected. Two monolithically connected components form a coherent, integral component and are connected seamlessly. In particular, two monolithically connected components are manufactured in a single production step.

[0025] The battery housing shell preferably comprises a plastic material or is formed from a plastic material. A battery housing shell designed in this way has the advantage that the battery housing shell can be manufactured in a simplified and, in particular, cost-effective manner.

[0026] The cover layer can be made of the same plastic as the battery housing shell or can be formed from it.

[0027] The plastic can comprise or be designed as a polypropylene (PP), a polyamide (PA) or another thermoplastic plastic.

[0028] The plastic can be designed as a thermoset.

[0029] The plastic may comprise fibers. The fibers may be glass fibers and / or carbon fibers and / or aramid fibers. The fibers may be short fibers and / or long fibers and / or continuous fibers.

[0030] The battery housing shell is preferably designed such that the cooling fluid inlet and / or the cooling fluid outlet is / are monolithically connected to the battery housing shell.

[0031] A battery housing shell designed in this way has the advantage that the battery housing shell is even simpler and can be manufactured in one production step.

[0032] The cooling fluid inlet and / or the cooling fluid outlet can be arranged in the connecting wall.

[0033] Preferably, the battery housing shell is designed such that the battery housing shell has at least one fluid distribution device arranged in the channel volume and connected to the channel bottom surface, wherein the fluid distribution device is arranged downstream of the cooling fluid inlet such that cooling fluid flowing into the channel volume through the cooling fluid inlet is distributed in the direction of a width extension of the channel volume.

[0034] A battery housing shell designed in this way has the advantage that a more homogeneous heat transfer is achieved between the battery cells arranged in the receiving volume of the battery housing shell and the cooling fluid flowing through the cooling fluid channel, whereby a more homogeneous temperature distribution can be achieved in the receiving volume of the battery housing shell. Cooling fluid distributed across the width by the fluid distribution device can essentially undermine the entire receiving surface of the receiving volume, so that a more homogeneous heat transfer can take place between the battery cells arranged in the receiving volume and the cooling fluid.

[0035] The fluid distribution device can be materially joined, preferably monolithically connected to the channel bottom surface and extend in the vertical extent of the channel volume from the channel bottom surface in the direction of the channel boundary surface of the cover layer.

[0036] The fluid distribution device can be designed as an elevation with an elliptical or a circular cross-section.

[0037] A battery housing shell designed in this way has the advantage that a cooling fluid flowing through the cooling fluid channel is distributed more homogeneously across the width of the channel volume. Due to the elliptical or circular cross-section of the fluid distribution device, the cooling fluid can flow around it more homogeneously and with less turbulence. This makes it possible to achieve even more homogeneous heat transfer between battery cells arranged in the receiving volume and the cooling fluid flowing through the cooling fluid channel. A fluid distribution device arranged downstream of the cooling fluid inlet is arranged at a distance from the cooling fluid inlet in the longitudinal extent.

[0038] Preferably, the battery housing shell is designed such that the battery housing shell has a plurality of fluid distribution devices arranged in the channel volume and connected to the channel bottom surface, wherein the fluid distribution devices are arranged downstream of the cooling fluid inlet such that cooling fluid flowing into the channel volume through the cooling fluid inlet is distributed in the direction of the width of the channel volume, wherein the fluid distribution devices are arranged spaced from one another in a first row in the direction of the width of the channel volume, and wherein the width of the channel volume is aligned orthogonally to a length of the channel volume.

[0039] A battery housing shell designed in this way has the advantage of achieving even more homogeneous heat transfer between the battery cells arranged in the receiving volume of the battery housing shell and the cooling fluid flowing through the cooling fluid channel. Due to the large number of fluid distribution devices arranged in the channel volume, which are arranged in a row along the width of the channel volume, a cooling fluid flowing into the channel volume can be distributed even more effectively across the width of the channel volume.

[0040] Preferably, a first distance in the width direction between each two fluid distribution devices of the first row is constant. In other words, the fluid distribution devices of the first row preferably each have the same first distance from one another in the width direction.Preferably, the battery housing shell is designed such that the battery housing shell has a plurality of fluid distribution devices arranged in the channel volume and connected to the channel bottom surface, wherein the fluid distribution devices are arranged spaced apart from one another in a second row in the direction of the width of the channel volume, wherein the second row is arranged spaced apart from the first row in the direction of the length of the channel volume, and wherein the fluid distribution devices of the second row are arranged offset from the fluid distribution devices of the first row in the direction of the width of the channel volume.

[0041] A battery housing shell designed in this way has the advantage that an even more homogeneous heat transfer can be achieved between the battery cells arranged in the receiving volume of the battery housing shell and the cooling fluid flowing through the cooling fluid channel. The second row of fluid distribution devices allows a cooling fluid flowing into the channel volume to be distributed evenly across the width of the channel volume.

[0042] The second row may comprise at least two fluid distribution devices.

[0043] Preferably, a second distance in the width direction between each two fluid distribution devices of the second row is constant. In other words, the fluid distribution devices of the second row preferably each have the same second distance from one another in the width direction.

[0044] Preferably, the first widthwise spacing between any two fluid distribution devices of the first row is equal to the second widthwise spacing between any two fluid distribution devices of the second row. The second row of fluid distribution devices is preferably arranged downstream of the first row of fluid distribution devices. Alternatively, the first row of fluid distribution devices is preferably arranged downstream of the second row of fluid distribution devices.

[0045] Preferably, the fluid distribution devices of the second row are arranged offset in the direction of the width of the channel volume relative to the fluid distribution devices of the first row such that the fluid distribution devices of the second row are each arranged centrally between two fluid distribution devices of the first row in the direction of the width of the channel volume.

[0046] The number of fluid distribution devices arranged in the first row is preferably greater than or equal to the number of fluid distribution devices arranged in the second row.

[0047] Preferably, the battery housing shell is designed such that the battery housing shell has at least one fluid guiding device connected to the channel bottom surface, which has a front-side second connecting surface.

[0048] A battery housing shell designed in this way has the advantage that a cooling fluid flowing through the cooling fluid channel can be guided in a targeted manner. For example, in the case of non-rectilinear fluid trajectories between the cooling fluid inlet and the cooling fluid outlet, the cooling fluid in the channel volume can be guided in such a way that uniform heat transfer and temperature distribution across the entire cooling surface provided for accommodating the battery components can be achieved on the battery components. Furthermore, cooling fluid flowing through the cooling fluid channel can be guided in a targeted manner, for example into edge regions of the channel volume, so that the cooling fluid flows through the channel volume as evenly as possible. This makes it possible to achieve homogeneous heat transfer between the battery cells arranged in the receiving volume of the battery housing shell and the cooling fluid flowing through the cooling fluid channel.Furthermore, mechanical stability, in particular pressure stability of the cover layer can be improved by the material-locking connection with the second connecting surface of the fluid guide device.

[0049] The fluid guidance device can be connected monolithically or materially to the channel floor surface.

[0050] The fluid guiding device can extend in the longitudinal extent of the channel volume.

[0051] The fluid guide device can have a length extension that is significantly greater than a width extension of the fluid guide device.

[0052] The fluid guide device can have a curved profile, at least in sections. In other words, the fluid guide device can have a first section that extends in the direction of the longitudinal extent of the channel volume, a second section that extends orthogonally to the first section in the direction of the width of the channel volume, and a curved, preferably partially circular, connecting section that connects the first section to the second section.

[0053] A battery housing shell designed in this way has the advantage that a cooling fluid flowing through the channel volume can be guided in an even more targeted manner. This allows the cooling fluid to flow through even the outermost edge regions of the channel volume. This allows for even more homogeneous heat transfer between the battery cells arranged in the receiving volume of the battery housing shell and the cooling fluid flowing through the cooling fluid channel.

[0054] Preferably, the battery housing shell is designed such that the fluid guiding device has two end sections which have a larger cross-sectional extent than a central section of the fluid guiding device connecting the two end sections.

[0055] The correspondingly designed battery housing shell has the advantage that the connection between the cover layer and the fluid guide device is reinforced, and the mechanical stability, in particular pressure stability of the cover layer, can be improved by the material-fit connection with the second connecting surface of the fluid guide device.

[0056] Preferably, the cross sections of the two end sections have at least in sections a rounded contour, preferably a circular contour.

[0057] The cross-sectional extent of the end sections of the fluid guiding device can be an extension in the direction of the width extension of the channel volume.

[0058] The fluid guide device can extend in the longitudinal direction of the channel volume. In other words, the two end sections of the fluid guide device can be arranged spaced apart from one another by the central section in the direction of the longitudinal extension of the channel volume.

[0059] The central section can have a longitudinal extent that is significantly greater than a width extent of the central section. The central section of the fluid guide device can have a curved profile, at least in sections. In other words, the central section can have a first section that extends in the direction of the longitudinal extent of the channel volume, a second section that extends orthogonally to the first section in the direction of the width extent of the channel volume, and a curved connecting section, preferably curved in the shape of a part-circle arc, that connects the first section to the second section.

[0060] A battery housing shell designed in this way has the advantage that a cooling fluid flowing through the channel volume can be guided in an even more targeted manner. This allows the cooling fluid to flow through even the outermost edge regions of the channel volume. This allows for even more homogeneous heat transfer between the battery cells arranged in the receiving volume of the battery housing shell and the cooling fluid flowing through the cooling fluid channel.

[0061] Preferably, the battery housing shell is designed such that the cover layer is connected in a materially bonded manner to the at least one fluid guiding device by means of its second connecting surface.

[0062] The cover layer can be welded to the at least one fluid guiding device by means of its second connecting surface.

[0063] The battery housing shell is preferably designed such that the channel volume has at least a first flow region and a second flow region, wherein a free cross section of the channel volume in the first flow region is smaller than a free cross section of the channel volume in the second flow region. A battery housing shell designed in this way has the advantage that a volume flow of cooling fluid flowing through the first flow region can be reduced compared to a volume flow of cooling fluid flowing through the second flow region. As a result, for example, with a longer flow path in the second flow region, the same amount of heat as in the first flow region can be absorbed and transported away by the cooling fluid due to the larger volume flow in the second flow region.This allows a more homogeneous heat transfer to be achieved between the battery cells arranged in the battery housing shell and the cooling fluid flowing through the cooling fluid channel.

[0064] The free cross-section of the channel volume is a cross-section in a plane defined by the width and height of the channel volume.

[0065] The height extension of the free cross-section of the first flow area of ​​the channel volume may be less than the height extension of the free cross-section of the second flow area of ​​the channel volume.

[0066] The width extension of the free cross-section of the first flow area of ​​the channel volume can be equal to the width extension of the free cross-section of the second flow area of ​​the channel volume.

[0067] Preferably, the battery housing shell is designed such that the first flow region is at least partially separated from the second flow region by means of the fluid guiding device.

[0068] Preferably, the battery housing shell is designed such that a first flow path between the cooling fluid inlet and the cooling fluid outlet through the first flow region is shorter than a second flow path between the cooling fluid inlet and the cooling fluid outlet through the second flow region.

[0069] Preferably, the battery housing shell is designed such that the battery housing shell has a channel dividing wall arranged in the channel volume, wherein the channel dividing wall divides the channel volume into a first channel sub-volume and into a second channel sub-volume separate from the first channel sub-volume, wherein the channel dividing wall has a connecting channel which fluidly connects the first channel sub-volume to the second channel sub-volume.

[0070] A battery housing shell designed in this way has the advantage that a cooling fluid can flow through a channel volume more evenly. By dividing a channel volume into a first and a second channel sub-volume, a cooling fluid flowing through the channel volume can be guided in a more controlled manner. This makes it possible to achieve more homogeneous heat transfer between the battery cells arranged in the receiving volume of the battery housing shell and the cooling fluid. Furthermore, the stability of the correspondingly designed battery housing shell is increased.

[0071] The channel dividing wall may be connected to the channel floor surface. The channel dividing wall may be monolithically connected to the channel floor surface.

[0072] The channel dividing wall may extend from the channel bottom surface towards the cover layer.

[0073] The channel dividing wall can have a longitudinal extension and a width extension, wherein the longitudinal extension is substantially greater than the width extension of the channel dividing wall. The channel dividing wall can divide the channel volume into two or more channel sub-volumes in the direction of the longitudinal extension of the channel volume. The two channel sub-volumes can be of equal size. The two channel sub-volumes can have the same width extension and / or the same longitudinal extension.

[0074] The channel dividing wall may have a third connecting surface at its end face. The cover layer may be materially bonded to the third connecting surface, for example, by welding.

[0075] A battery housing shell designed in this way has the advantage that the mechanical stability of the cover layer can be further improved by the material-fit connection with the third connecting surface of the channel dividing wall.

[0076] A stabilizing rib can be arranged in the connecting channel of the channel dividing wall. The connecting channel can be divided by the stabilizing rib into two or more, preferably equally sized, connecting sub-channels. The stabilizing rib can be connected to the channel bottom surface. The stabilizing rib can be monolithically connected to the channel bottom surface.

[0077] The channel bottom surface can have a recess and the connecting channel of the channel dividing wall can be arranged in the region of the recess of the channel bottom surface such that a cooling fluid flowing through the fluid channel undermines the channel dividing wall when the cooling fluid flows from the first channel sub-volume into the second channel sub-volume.

[0078] A battery housing shell designed in this way has the advantage of increased mechanical stability. Because the connecting channel is arranged in the region of the recess in the channel base surface, the channel dividing wall has increased mechanical stability, since the channel dividing wall also has a sufficient vertical extension in the region of the connecting channel.

[0079] The cooling fluid inlet can be fluidly connected to the first channel sub-volume and the cooling fluid outlet can be fluidly connected to the second channel sub-volume. The cooling fluid inlet and the cooling fluid outlet can be arranged on the same side of the battery housing shell, in particular in the same wall section of the connecting wall. In a battery housing shell designed in this way, a cooling fluid can flow through the cooling fluid inlet into the first channel sub-volume and continue to flow in a first flow direction in the direction of the length of the first channel sub-volume. The flowing cooling fluid can flow in the region of the connecting channel of the channel dividing wall in a transverse flow direction in the direction of the width of the first channel sub-volume and undermine the channel dividing wall in the region of the connecting channel and flow into the second channel sub-volume.In the second channel sub-volume, the cooling fluid can continue to flow in a second flow direction in the direction of the length of the second channel sub-volume and leave the second channel sub-volume through the cooling fluid outlet. The second flow direction can be opposite to the first flow direction.

[0080] The battery housing shell is preferably designed such that the cooling fluid inlet is fluidly connected to the channel volume through an inlet opening, wherein the battery housing shell has a deflection device arranged in the channel volume for deflecting a cooling fluid flowing into the channel volume through the inlet opening in the direction of the width of the channel volume. A battery housing shell designed in this way has the advantage that a more homogeneous heat transfer can be achieved between battery cells arranged in the receiving volume of the battery housing shell and the cooling fluid flowing through the cooling fluid channel, because the deflection device allows a cooling fluid flowing into the channel volume to be distributed more effectively across the width of the channel volume.

[0081] The inlet opening may be arranged in the connecting wall. Alternatively, the inlet opening may be arranged in the channel bottom surface.

[0082] The deflection device can have a deflection body connected to the channel bottom surface, wherein the deflection body is arranged downstream of the inlet opening in such a way that cooling fluid flowing into the channel volume through the inlet opening is distributed in the width extension of the channel volume.

[0083] The deflection body can be arranged in the direction of the width of the channel volume in alignment with the inlet opening.

[0084] The deflection device may comprise a guide body, wherein the guide body may be connected to the inlet opening, for example, monolithically. The guide body may be connected to the connecting wall, for example, monolithically. The guide body may extend from the channel bottom surface toward the channel boundary surface of the cover layer.

[0085] The guide body can be arranged at least partially upstream of the deflection body.

[0086] The guide body can have a curved contour and / or a U-shaped contour and / or a V-shaped contour in the plane defined by the length of the channel volume and the width of the channel volume. The channel bottom surface can have an inlet recess in the region of the inlet opening. The inlet recess can extend from the connecting wall in the direction of the length of the channel volume. The inlet recess can extend over substantially the entire width of the channel volume.

[0087] The inlet recess can have a V-shaped or a U-shaped contour in plan view of a plane spanned by the length of the channel volume and the width of the channel volume.

[0088] A battery housing shell designed in this way has the advantage that a more homogeneous heat transfer can be achieved between battery cells arranged in the receiving volume of the battery housing shell and the cooling fluid flowing through the cooling fluid channel, because an inlet opening designed in this way allows a cooling fluid flowing into the channel volume to be distributed more effectively across the width of the channel volume.

[0089] The present invention is further based on the object of providing a battery housing with a more homogeneous heat transfer of heat from battery cells or battery modules arranged in the battery housing and at the same time a reduced manufacturing complexity and a functional integration of the flow distribution in the battery housing.

[0090] The object underlying the present invention is achieved by a battery housing having the features of claim 14.

[0091] More specifically, the object underlying the present invention is achieved by a battery housing for accommodating at least one battery component in a receiving volume at least partially delimited by the battery housing. The battery housing has at least one battery housing shell as described above and a battery housing cover, wherein the battery housing cover is connected to the battery housing shell, and wherein the receiving volume is delimited by the battery housing shell and the battery housing cover.

[0092] A battery housing designed in this way has the advantage that a cooling fluid flowing through the cooling fluid channel of the battery housing shell can essentially undermine the entire receiving area of ​​the receiving volume formed by the cooling surface of the cover layer. This allows for a more homogeneous heat transfer between the battery cells arranged in the receiving volume of the battery housing shell and the cooling fluid flowing through the cooling fluid channel.

[0093] The battery housing cover may be made of a plastic or be formed from a plastic. The battery housing cover may be made of the same plastic as the battery housing shell.

[0094] The battery housing cover can be designed as another battery housing shell as described above. Battery components that can be accommodated in the receiving volume of a battery housing designed in this way can be in contact with both the cooling surface of the battery housing shell and the cooling surface of the additional battery housing shell. This allows for even more uniform heat transfer between the battery components arranged in the receiving volume and the cooling fluid flowing through the cooling fluid channels of the battery housing shells.

[0095] The present invention is further based on the object of providing a battery with a more homogeneous heat transfer of heat from the battery cells or from the battery modules and at the same time a reduced manufacturing complexity and at the same time an increased functional integration.

[0096] The object underlying the present invention is achieved by a battery with at least one battery component, wherein the battery has a battery housing shell as described above, and wherein the at least one battery component is arranged in the receiving volume of the battery housing shell and is in contact with the cooling surface of the cover layer.

[0097] Further advantages, details and features of the invention will become apparent from the following exemplary embodiments. These show in detail:

[0098] Figure 1: a battery housing shell according to a first embodiment in a sectional view,

[0099] Figure 2: the battery housing shell according to the first embodiment in a plan view of the channel bottom surface;

[0100] Figure 3 : a battery housing shell according to a second

[0101] Embodiment in a plan view of the channel bottom surface;

[0102] Figure 4: a sectional view of the battery housing shell according to the second embodiment in the region of the connecting channel of the channel dividing wall; and

[0103] Figure 5 shows the area of ​​the cooling fluid inlet of a battery housing shell according to a third embodiment, in a plan view of the channel bottom surface. In the following description, the same reference symbols denote the same components or the same features, so that a description given with reference to one figure regarding a component also applies to the other figures, thus avoiding a repetitive description. Furthermore, individual features that were described in connection with one embodiment can also be used separately in other embodiments.

[0104] Figure 1 shows a battery housing shell 10 according to a first embodiment in a schematic sectional view. The battery housing shell 10 at least partially delimits a receiving volume 1 for receiving at least one battery component. The battery housing shell 10 has a channel bottom surface 11 and a circumferential connecting wall 20 which is connected to the channel bottom surface 11 and extends in the direction of the receiving volume 1, wherein the connecting wall 20 has a front-side first connecting surface 21. Although not shown in the figure, it would also be possible for the connecting wall 20 to be connected only to the side walls of the battery housing shell 10 and thus indirectly via the side walls to the channel bottom surface 11.

[0105] The battery housing shell 10 has a cover layer 30 which is fluid-tightly connected to the first connecting surface 21 of the connecting wall 20, so that a channel volume 41 is formed which is delimited by the channel bottom surface 11 of the connecting wall 20 and the cover layer 30. A cooling fluid inlet 50 of the battery housing shell 10 (not shown in Figure 1) and a cooling fluid outlet 60 of the battery housing shell 10 are fluidly connected to the channel volume 41 to form a cooling fluid channel 40 (not fully shown in Figure 1).

[0106] A cooling surface 31 of the cover layer 30, facing away from the channel volume 41, faces the receiving volume 1 and is designed to contact the at least one battery component. A channel boundary surface 32 is arranged opposite the cooling surface 31 of the cover layer 30 and faces the channel volume 41.

[0107] Figure 2 shows the battery housing shell 10 according to the first embodiment in a plan view of the channel bottom surface 11.

[0108] The cooling fluid inlet 50 is arranged opposite the cooling fluid outlet 60. The channel volume 41 has a length L and a width B, wherein the length L is greater than the width B of the channel volume 41.

[0109] The battery housing shell 10 has a plurality of fluid distribution devices 70 arranged in the channel volume 41 and connected to the channel bottom surface 11, wherein the fluid distribution devices 70 are arranged downstream of the cooling fluid inlet 50 such that cooling fluid flowing into the channel volume 41 through the cooling fluid inlet 50 is distributed in the direction of the width B of the channel volume 41. The fluid distribution devices 70 are arranged spaced from one another in a first row 71 in the direction of the width B of the channel volume 41. In the illustrated embodiment, the fluid distribution devices 70 are each formed as elevations 70 from the channel bottom surface 11, each having a circular cross-section.

[0110] Some of the fluid distribution devices 70 are arranged at a distance from one another in a second row 72 in the direction of the width B of the channel volume 41, the second row 72 being spaced from the first row 71 in the direction of the length L of the channel volume 41 and being arranged upstream of the first row 71. The fluid distribution devices 70 of the second row 72 are arranged offset from the fluid distribution devices 70 of the first row 71 in the direction of the width B of the channel volume 41. The battery housing shell 10 has a fluid guide device 80 which is connected to the channel bottom surface 11 and has a front-side second connecting surface 81, the fluid guide device 80 having two end sections 82 which have a larger cross-sectional extent than a central section 83 of the fluid guide device 80 connecting the two end sections 82.The cross sections of the two end sections 82 have a rounded contour at least in sections.

[0111] The fluid guide device 80 extends in the longitudinal direction L of the channel volume 41, wherein the two end sections 82 of the fluid guide device 80 are arranged at a distance from one another by the central section 83 in the direction of the longitudinal direction L of the channel volume 41. The central section 83 has a longitudinal extent that is significantly greater than a width extent of the central section 83.

[0112] The fluid guide device 80 divides the channel volume 41 into sections into a first flow area 44 and a second flow area 45.

[0113] The cooling fluid inlet 50 is fluidly connected to the channel volume 41 through an inlet opening 100 and the battery housing shell

[0114] 10 has a deflection device 110 arranged in the channel volume 41 for deflecting a cooling fluid flowing into the channel volume 41 through the inlet opening 100 in the direction of the width B of the channel volume 41. The inlet opening 100 is arranged in the channel bottom surface 11.

[0115] The deflection device 110 has a channel bottom surface

[0116] 11 connected deflecting body 111, wherein the deflecting body 111 is arranged downstream of the inlet opening 100 such that cooling fluid flowing into the channel volume 41 through the inlet opening 100 is distributed in the width direction B of the channel volume 41. The deflecting body 111 is arranged in alignment with the inlet opening 100 in the direction of the width direction B of the channel volume 41.

[0117] The channel bottom surface 11 has an inlet recess 101 in the region of the inlet opening 100. The inlet recess 101 has a V-shaped form in a plan view of the channel bottom surface 11.

[0118] Figure 3 shows a battery housing shell 10 according to a second embodiment in a plan view of the channel bottom surface 11.

[0119] The battery housing shell 10 has a channel dividing wall 90 arranged in the channel volume 41, wherein the channel dividing wall 90 divides the channel volume 41 along the longitudinal extent L of the channel volume 41 into a first channel sub-volume 42 and into a second channel sub-volume 43 separate from the first channel sub-volume 42, wherein the first channel sub-volume 42 and the second channel sub-volume 43 are of equal size and have the same width B and length L. The channel dividing wall 90 has a connecting channel 91 which fluidly connects the first channel sub-volume 42 to the second channel sub-volume 43.

[0120] The channel dividing wall 90 has a third connecting surface 92 on the front side for the material-locking connection with the cover layer 30.

[0121] The first channel sub-volume 42 is divided in sections by a fluid guide device 80 into a first flow region 421 and a second flow region 422.

[0122] A free cross-section of the first channel sub-volume 42 is smaller in the first flow region 421 than a free cross-section of the second channel sub-volume 42 in the second flow region 422. A first flow path 423 through the first flow region 421 is shorter than a second flow path 424 through the second flow region 422.

[0123] The second channel sub-volume 43 is divided in sections by a further fluid guiding device 80 into a first flow region 431 and a second flow region 432.

[0124] A free cross section of the second channel sub-volume 43 is smaller in the first flow region 431 than a free cross section of the second channel sub-volume 43 in the second flow region 432.

[0125] A first flow path 433 through the first flow region 431 is shorter than a second flow path 434 through the second flow region 432.

[0126] The further fluid guidance device 80 in the second channel sub-volume 43 has a central section 83 with a sectionally curved profile. The central section 83 has a first section 831, which extends in the direction of the longitudinal extent L of the second channel sub-volume 43, a second section 832, which extends orthogonally to the first section 831 in the direction of the width extent B of the second channel sub-volume 43, and a curved connecting section 833, which connects the first section 831 to the second section 832.

[0127] The cooling fluid inlet 50 opens into the first channel sub-volume 42, and the cooling fluid outlet 60 opens into the second channel sub-volume 43. The cooling fluid inlet 50 and the cooling fluid outlet 60 are arranged on the same side of the battery housing shell 10. Figure 4 shows a sectional view of the battery housing shell 10 according to the second embodiment in the region of the connecting channel 91 of the channel dividing wall 90.

[0128] The channel bottom surface 11 has a recess 12. The connecting channel 91 of the channel dividing wall 90 is arranged in the region of the recess 12 such that a cooling fluid flowing through the fluid channel 40 undermines the channel dividing wall 90 when the cooling fluid flows from the first channel sub-volume 42 into the second channel sub-volume 43.

[0129] A stabilizing rib 93 is arranged in the connecting channel 91 of the channel dividing wall 90. The connecting channel 91 is divided by the stabilizing rib 93 into two equally sized connecting sub-channels 911, 912. The stabilizing rib 93 is monolithically connected to the channel bottom surface 11.

[0130] In a battery housing shell 10 according to the second embodiment described in Figures 3 and 4, a cooling fluid flowing through the cooling fluid inlet 50 into the first channel sub-volume 42 flows in a first flow direction RI in the direction of the longitudinal extent L of the first channel sub-volume 42, wherein the cooling fluid flows along the first flow path 423 through the first flow region 421 and along the second flow path 424 through the second flow region 422 of the first channel sub-volume 42. The cooling fluid flows in the region of the connecting channel 91 of the channel dividing wall 90 in a transverse flow direction R3 in the direction of the width extent B of the first channel sub-volume 42, undermines the channel dividing wall 90 in the region of the connecting channel 91 and flows into the second channel sub-volume 43.In the second channel sub-volume 43, the cooling fluid flows in a second flow direction R2 in the direction of the longitudinal extent L of the second channel sub-volume 43, wherein the cooling fluid flows along the first flow path 433 through the first flow region 431 and along the second flow path 434 through the second flow region 432, and leaves the second channel sub-volume 43 through the cooling fluid outlet 60. The second flow direction R2 is opposite to the first flow direction RI.

[0131] Figure 5 shows the area of ​​the cooling fluid inlet 50 of a battery housing shell 10 according to a third embodiment in a plan view of the channel bottom surface 11.

[0132] The channel bottom surface 11 has an inlet recess 101 in the region of the inlet opening 100, wherein the inlet recess 101 extends from the connecting wall 20 in the direction of the longitudinal extent L of the channel volume 41. The inlet recess 101 extends over substantially the entire width extent B of the channel volume 41.

[0133] The deflection device 110 has a guide body 112, wherein the guide body 112 is connected to the inlet opening 10. The guide body 112 extends from the channel bottom surface 11 in the direction of the channel boundary surface 32 of the cover layer 30.

[0134] The guide body 112 is arranged at least partially upstream of the deflection body 111. The guide body 112 delimits a partial space of the channel volume 41, wherein the partial space delimited by the guide body 112 encloses an interior angle of 180° in a plane defined by the length L and the width B of the channel volume 41.

[0135] The guide body 112 has a curved or compressed V-shaped contour in the plane defined by the length L and the width B. List of reference symbols

[0136] 1 Recording vo lumen

[0137] 10 Battery housing shell

[0138] 11 Channel floor area

[0139] 12 Deepening

[0140] 20 connecting wall

[0141] 21 first connecting surface

[0142] 30 top layer

[0143] 31 Cooling surface

[0144] 32 Channel boundary area

[0145] 40 fluid channel

[0146] 41 Kana Ivo lumen

[0147] 42 first channel subvolume

[0148] 421 first flow area

[0149] 422 second flow area

[0150] 423 first flow path

[0151] 424 second flow path

[0152] 43 second channel subvolume

[0153] 431 first flow area

[0154] 432 second flow area

[0155] 433 first flow path

[0156] 434 second flow path

[0157] 44 first flow area

[0158] 45 second flow area

[0159] 46 first flow path

[0160] 47 second flow path

[0161] 50 Cooling fluid inlet

[0162] 60 Cooling fluid outlet

[0163] 70 Fluid distribution device

[0164] 71 first row (of fluid distribution devices)

[0165] 72 second row (of fluid distribution devices)

[0166] 80 Fluid guide device

[0167] 81 second connecting surface 82 end section

[0168] 83 Middle section

[0169] 831 first section

[0170] 832 second section

[0171] 833 connecting section

[0172] 90 channel dividing wall

[0173] 91 connecting channel

[0174] 911 connecting subchannel

[0175] 912 connecting sub-channel

[0176] 92 third connecting surface

[0177] 93 Stabilizing rib

[0178] 100 Inlet opening

[0179] 101 Inlet recess

[0180] 110 Deflection device

[0181] 111 deflection body

[0182] 112 guide bodies

[0183] B Width

[0184] L Length extension

[0185] RI first flow direction

[0186] R2 second flow direction

[0187] R3 Cross flow direction

Claims

Patent claims 1. Battery housing shell (10) for receiving at least one Battery component in a receiving volume (1) at least partially delimited by the battery housing shell (10), wherein the battery housing shell (10) has the following features: the battery housing shell (10) has a channel bottom surface (11) and a first connecting surface (21) at least indirectly connected to the channel bottom surface (11); the battery housing shell (10) has a cover layer (30) which is connected to the first connecting surface (21) in a fluid-tight manner, so that a channel volume (41) delimited by the channel bottom surface (11) and the cover layer (30) is formed; a cooling fluid inlet (50) of the battery housing shell (10) and a cooling fluid outlet (60) of the battery housing shell (10) are fluidly connected to the channel volume (41) to form a cooling fluid channel (40); and a cooling surface (31) of the cover layer (30) facing away from the channel volume (41) faces the receiving volume (1) and is designed to contact the battery component.

2. Battery housing shell (10) according to claim 1, characterized by the following features: the battery housing shell (10) has a circumferential connecting wall (20) which is at least indirectly connected to the channel bottom surface (11) and extends in the direction of the receiving volume (1); an end face (21) of the connecting wall (20) forms the first connecting surface (21); the channel volume (41) is delimited by the channel bottom surface (11), the connecting wall (20) and the cover layer (30).

3. Battery housing shell (10) according to one of the preceding claims, characterized in that the battery housing shell (10) comprises a plastic or is formed from a plastic.

4. Battery housing shell (10) according to one of the preceding claims, characterized in that the cooling fluid inlet (50) and / or the cooling fluid outlet (60) is / are monolithically connected to the battery housing shell (10).

5. Battery housing shell (10) according to one of the preceding claims, characterized by the following features: the battery housing shell (10) has at least one fluid distribution device (70) arranged in the channel volume (41) and connected to the channel bottom surface (11); and the fluid distribution device (70) is arranged downstream of the cooling fluid inlet (50) such that cooling fluid flowing into the channel volume (41) through the cooling fluid inlet (50) is distributed in the direction of a width extension (B) of the channel volume (41).

6. Battery housing shell (10) according to claim 5, characterized by the following features: the battery housing shell (10) has a plurality of fluid distribution devices (70) arranged in the channel volume (41) and connected to the channel bottom surface (11); the fluid distribution devices (70) are arranged downstream of the cooling fluid inlet (50) such that cooling fluid flowing into the channel volume (41) through the cooling fluid inlet (50) is distributed in the direction of the width (B) of the channel volume (41); and the fluid distribution devices (70) are arranged spaced apart from one another in a first row (71) in the direction of the width (B) of the channel volume (41), wherein the width extension (B) of the channel volume (41) is oriented orthogonally to a length extension (L) of the channel volume (41).

7. Battery housing shell (10) according to claim 6, characterized by the following features: the battery housing shell (10) has a plurality of fluid distribution devices (70) arranged in the channel volume (41) and connected to the channel bottom surface (11), wherein the fluid distribution devices (70) are arranged in a second row (72) at a distance from one another in the direction of the width (B) of the channel volume (41); wherein the second row (72) is arranged at a distance from the first row (71) in the direction of the length (L) of the channel volume (41); and wherein the fluid distribution devices (70) of the second row (72) are arranged offset from the fluid distribution devices (70) of the first row (71) in the direction of the width (B) of the channel volume (41).

8. Battery housing shell (10) according to one of the preceding claims, characterized in that the battery housing shell (10) has at least one fluid guide device (80) connected to the channel bottom surface (11) which has a front-side second connecting surface (81).

9. Battery housing shell (10) according to claim 8, characterized in that the fluid guide device (80) has two end sections (82) which have a larger cross-sectional extent than a central section (83) of the fluid guide device (80) connecting the two end sections (82).

10. Battery housing shell (10) according to claim 8 or 9, characterized in that the cover layer (30) with the at least one Fluid guide device (80) by means of whose second connecting surface (81) is materially connected.

11. Battery housing shell (10) according to one of the preceding claims, characterized by the following features: the channel volume (41) has at least a first flow region (44) and a second flow region (45); and a free cross-section of the channel volume (41) in the first flow region (44) is smaller than a free cross-section of the channel volume (41) in the second flow region (45).

12. Battery housing shell (10) according to a combination of claims 8 and 11, characterized in that the first flow region (44) is at least partially separated from the second flow region (45) by means of the fluid guiding device (80).

13. Battery housing shell (10) according to claim 12, characterized in that a first flow path (46) between the cooling fluid inlet (50) and the cooling fluid outlet (60) through the first flow region (44) is shorter than a second flow path (47) between the cooling fluid inlet (50) and the cooling fluid outlet (60) through the second flow region (45).

14. Battery housing shell (10) according to one of the preceding claims, characterized by the following features: the battery housing shell (10) has a channel dividing wall (90) arranged in the channel volume (41), wherein the channel dividing wall (90) divides the channel volume (41) into a first channel sub-volume (42) and into a second channel sub-volume (43) separate from the first channel sub-volume (42); and the channel dividing wall (90) has a connecting channel (91) which fluidly connects the first channel sub-volume (42) to the second channel sub-volume (43).

15. Battery housing shell (10) according to one of the preceding claims, characterized by the following features: the cooling fluid inlet (50) is fluidly connected to the channel volume (41) through an inlet opening (100); the battery housing shell (10) has a deflection device (110) arranged in the channel volume (41) for deflecting a cooling fluid flowing into the channel volume (41) through the inlet opening (100) in the direction of the width extension (B) of the channel volume (41).

16. Battery housing for accommodating at least one battery component in a receiving volume (1) at least partially delimited by the battery housing, wherein the battery housing has the following features: the battery housing has at least one battery housing shell (10) according to one of the preceding claims; the battery housing has a battery housing cover, wherein the battery housing cover is connected to the battery housing shell; and the receiving volume (1) is delimited by the battery housing shell (10) and the battery housing cover.

17. A battery comprising at least one battery component, the battery having the following features: the battery has at least one battery housing shell (10) according to one of claims 1 to 15; and the at least one battery component is arranged in the receiving volume (1) of the battery housing shell (10) and is in contact with the cooling surface (31) of the cover layer (30).

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