Battery housing and battery system

Abstract

The invention relates to a battery housing (1) for accommodating a traction battery (20) of an electric or hybrid vehicle having a plurality of battery cell modules (21). A battery housing (1) according to the invention comprises an upper housing part (2) and a lower housing part (3) opposite the upper housing part, which together at least partially delimit a housing interior (4). In a longitudinal section of the battery housing (1), the lower housing part (3) delimits a groove-like recess (5) for receiving an inductive charging device (26). The recess (5) tapers in a longitudinal section towards the housing upper part (2). In this way, the magnetic field line profile of the magnetic field can be improved during the inductive transmission of energy to the inductive charging device (26) accommodated in the recess.

Description

Technical Field

[0001] The present invention relates to a battery housing for accommodating a traction battery having a plurality of battery cell modules of an electric vehicle or a hybrid vehicle. The present invention also relates to a battery system having such a battery housing and a motor vehicle having such a battery system. Background Art

[0002] Motor vehicles typically have an electrical energy storage device, such as a rechargeable battery, for supplying electrical consumers. In particular, in at least partially electrically driven vehicles, the electrical energy storage device is used to power the vehicle. For simplicity, this electrical energy storage device will be referred to as a "battery" below. Such a battery is also known as a "traction battery." It is also known to charge a vehicle, particularly a battery installed in a vehicle, inductively. Corresponding charging systems each have a coil inside the vehicle and outside the vehicle. Typically, a stationary charging device with a primary coil is located outside the vehicle. This stationary charging device inductively interacts with a mobile inductive charging device located in the vehicle and having a secondary coil to transfer energy to the battery and thereby electrically charge the battery.

[0003] The assembly in a motor vehicle is also referred to as a motor vehicle assembly or “vehicle assembly.” During operation, an assembly outside the motor vehicle is usually located underneath the motor vehicle and is also referred to as a ground assembly or “ground assembly.”

[0004] Typically, to ensure good inductive coupling between the "vehicle component" and the "ground component," the inductive charging device is positioned as far down as possible on the vehicle—typically in the area of the vehicle's lower floor. However, for space-constrained reasons, the battery cells are often also housed in a battery housing, which is also positioned in the area of the lower floor. Summary of the Invention

[0005] The object of the present invention is to provide an improved embodiment for a battery housing which is designed to accommodate a battery, in particular a traction battery, and also to accommodate an inductive charging device, and which is distinguished in particular by reduced interference with the magnetic field to be received by the charging device by the battery housing.

[0006] This object is achieved by the subject matter of the independent claims. Preferred embodiments are the subject matter of the dependent claims.

[0007] The basic idea of the present invention is therefore to provide a recess in the battery housing for accommodating an inductive charging device with an inclined edge. It has been shown that this influences the course of the field lines of the alternating magnetic field generated between the primary and secondary coils in such a way that—compared to a battery housing lacking such an inclination—improved magnetic coupling is achieved. This also ensures that the battery housing mechanically protects and electromagnetically shields the battery cells arranged in the housing interior. At the same time, undesirable electromagnetic shielding of the inductive charging device by the battery housing relative to the ground structure assembly is avoided or at least reduced, and concomitantly, undesirable interference with the course of the magnetic field lines of the magnetic field generated by the primary coil and received by the secondary coil on the vehicle is kept to a minimum.

[0008] Specifically, the battery housing according to the present invention includes an upper housing part and a lower housing part opposite the upper housing part, which together at least partially delimit the housing interior. In a longitudinal cross-section of the battery housing, the lower housing part delimits a groove-like recessed portion for accommodating an inductive charging device. As described above, the mobile charging device can cooperate with a stationary charging device, which is stationary and disposed on a roadway or the like where motor vehicles can pass, for wireless inductive energy transfer from the stationary charging device to the mobile charging device.

[0009] According to the present invention, the recess tapers in longitudinal section toward the housing upper part. This improves the course of the magnetic field lines during the inductive transfer of energy to an inductive charging device with a (secondary) coil housed in the recess, thereby increasing the efficiency of the energy transfer and reducing heat losses. This also simplifies cooling of the inductive charging device.

[0010] In a preferred embodiment of the battery housing, the groove-like recess has a pot-shaped geometry in longitudinal section, with a pot bottom, and two opposite ends of the pot bottom adjoining a pot flange protruding from the pot bottom. In longitudinal section, the two pot flanges are each arranged at an acute angle relative to the pot bottom. This allows for a particularly advantageous deflection of the field lines of the magnetic field between the primary and secondary coils when an inductive charging device having a (secondary) coil is arranged in the recess.

[0011] Preferably, the acute angle is between 15° and 75°, which results in a particularly favorable field line course.

[0012] Particularly preferably, the material of the lower housing part, at least in the region of the recess, consists of or includes an electrically conductive material. Metal, for example aluminum, is expediently used as the material. This ensures effective electromagnetic shielding of components arranged in the housing interior, in particular battery cells, and of the power / control electronics arranged in the housing interior.

[0013] According to an advantageous embodiment of the invention, a magnetic conductor is arranged on the outer side of the lower housing part facing away from the housing interior in longitudinal section, at least in the edge region of the lower housing part that delimits the recess. Such a magnetic conductor improves the electromagnetic shielding properties of the battery housing for shielding the housing interior and, moreover, brings about an additional deflection of the magnetic field lines, so that the magnetic conductor can be used to further optimize the field line course.

[0014] Such a magnetic conductor is particularly distinguished by having a relative magnetic permeability μ r >1.0. Materials with relative magnetic permeability μ r Materials with a magnetic conductivity of >100% are particularly preferred, as is common in soft magnetic materials (e.g., ferrite). The magnetic conductor can particularly advantageously be or include a foil made of such a magnetically conductive material. Such a foil is cost-effective to purchase and can also be easily fastened to the battery housing.

[0015] According to a further advantageous embodiment, in longitudinal section the foil has a main section arranged at the edge region and an extension section arranged in the groove-like depression.

[0016] Preferably, in longitudinal section, the extension section can be designed as a projection that protrudes into the depression. In this variant, the extension section or projection extends the main section linearly or, alternatively, protrudes from the main section into the depression at an acute angle. Both variants result in a particularly favorable influence on the course of the magnetic field lines.

[0017] According to another advantageous embodiment, the projection rests against the can flange. This variant allows for particularly simple and mechanically stable fastening to the battery housing. However, as an alternative to this, in this embodiment, the projection can also protrude at an angle into the recess and be arranged at a distance from the can flange. In this case, the edge region of the lower housing part that delimits the recess is also particularly effectively magnetically shielded.

[0018] Particularly preferably, the material of the magnetic conductor or of the foil can be ferrite.

[0019] In another preferred embodiment, the groove depth of the groove-shaped depression measured in the vertical direction of the battery housing is between 10 mm and 40 mm. In this way, the installation space with a reduced installation height available between the housing lower part and the housing upper part in the region of the depression can be effectively used to accommodate components with a low installation height.

[0020] According to another advantageous embodiment, at least one electrical leadthrough, preferably two or more, particularly preferably at least three electrical leadthroughs, are formed in the lower housing part in the region of the recess. By means of such electrical leadthroughs, power / control electronics arranged in the interior region between the upper housing part and the recess can be electrically guided out of the housing interior.

[0021] Particularly preferably, at least one electrical connection can be designed as a plug-in electrical contact or can include a plug-in electrical contact into which the power / control electronics can be mechanically and electrically plugged in. This allows the power / control electronics to be not only electrically removed from the housing interior but also, in combination with further mechanical connection elements, to be mechanically and stably fastened to the battery housing.

[0022] In an alternative preferred embodiment, the electrical lead can also be connected indirectly to the battery via a flexible cable end of the inductive charging device. The flexible cable end of the inductive power electronics extends into a further cavity between the housing of the inductive charging device and the lower housing part of the battery and is connected in this cavity in a suitable manner to contacts guided through the lower housing part of the battery, in particular by means of a plug connection, a screw connection, or a crimp connection.

[0023] In another preferred embodiment, a mechanical reinforcement element made of plastic is arranged on the outer side of the lower housing part facing away from the housing interior in the longitudinal section, in the region of the recess, preferably in the region of the pot flange. This allows the inductive charging device to be fastened particularly stably to the housing.

[0024] According to an advantageous embodiment, at least one reinforcement element comprises a screw receptacle for receiving a plastic screw. This allows for a mechanically stable, yet releasable, fastening of the inductive charging device by means of a screw connection.

[0025] In alternative embodiments, clamping, clipping, or bayonet connections, or any combination of all the aforementioned connection methods, are also conceivable for securing the inductive charging device. Furthermore, it is conceivable that, for reasons of strength, the individual connecting elements are not made of an electromagnetically neutral material, such as plastic, but instead are entirely or partially made of an electrically conductive material, which would also affect the field line path of the energy transmission. In such cases, care must be taken to magnetically shield the metallic material installation location, if necessary, by appropriately introducing a magnetically conductive material. For this purpose, for example, the aforementioned magnetic conductors or magnetically conductive foils can also be used in the edge region of the recess.

[0026] The present invention further relates to a battery system for a motor vehicle with an electric drive. The battery system includes the battery housing according to the present invention described above, so that the advantages of the battery housing described above are transferred to the battery system according to the present invention. Furthermore, the battery system according to the present invention includes a rechargeable traction battery, which is arranged in the housing interior and has a plurality of battery cell modules. Furthermore, the battery system according to the present invention includes an inductive charging device, which is arranged in a recess and is used to charge the traction battery. The inductive charging device includes at least one induction coil for receiving an alternating electromagnetic field.

[0027] In a preferred embodiment of the battery system according to the present invention, the charging device is arranged entirely within the recess. If the battery system is installed in a motor vehicle, where it is typically arranged in the area of the vehicle's lower floor, this prevents the charging device from protruding downward and thus being exposed to an increased risk of damage or even destruction, particularly during driving. Particularly preferably, the recess is located largely symmetrically with respect to the vehicle's central axis, defined relative to the direction of travel, and also largely centrally between the vehicle's axles.

[0028] Furthermore, it is particularly preferred that power / control electronics electrically connected to the charging device be arranged in the interior region of the housing interior arranged between the recess and the upper housing part. In this way, the installation space still available in the region of the recess between the housing lower part and the housing upper part and having a reduced installation height can be effectively used to accommodate components having a sufficiently low installation height.

[0029] In a preferred embodiment of the battery system according to the invention, the magnetic conductor extends in the transverse direction at most as far as the inductive charging device, thereby preventing undesired electromagnetic shielding of the coil of the charging device by the magnetic conductor.

[0030] In another preferred embodiment of the battery system according to the present invention, the charging device has a transformer core made of ferrite. In this embodiment, the magnetic conductor extends in the direction toward the upper housing part up to the transformer core. This measure also prevents undesirable electromagnetic shielding of the charging device's coil(s) by the magnetic conductor.

[0031] The present invention further relates to a motor vehicle with an electric drive, in particular a hybrid vehicle or an electric vehicle. The motor vehicle comprises a vehicle interior and an electric drive system for driving the motor vehicle. Furthermore, the motor vehicle comprises the battery system according to the present invention described above, which is used to supply electrical energy to the electric drive system. Therefore, the aforementioned advantages of the battery housing according to the present invention also transfer to the motor vehicle according to the present invention.

[0032] In a preferred embodiment of the motor vehicle according to the invention, the battery system is arranged in the lower region of the motor vehicle, between the vehicle interior and the lower floor of the vehicle. The upper housing part faces the vehicle interior, while the lower housing part, which carries the mobile induction device, faces the lower floor. This allows for efficient inductive magnetic coupling of the charging device with the aforementioned stationary inductive charging device, which is typically located on a road surface over which the motor vehicle can travel. This allows for particularly efficient energy transfer to the inductive charging device and, therefore, to the traction battery electrically connected thereto.

[0033] Further important features and advantages of the invention emerge from the dependent claims, from the drawings and from the associated description of the figures based on the drawings.

[0034] It goes without saying that the features mentioned above and those still to be explained below can be used not only in the respectively indicated combination, but also in other combinations or alone without departing from the scope of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Preferred exemplary embodiments of the invention are shown in the drawings and are explained in more detail in the following description, wherein identical reference numerals refer to identical or similar components or components having the same function.

[0036] The accompanying drawings schematically show:

[0037] Figure 1 An example of a motor vehicle according to the invention is shown,

[0038] Figure 2a An example of a battery system according to the invention is shown, which has a battery housing and an inductive charging device.

[0039] Figure 2b Show Figure 2aA detailed schematic diagram showing Figure 2a a battery system or a battery housing accommodated in the region of a recess in the housing lower part, in which recess an inductive charging device is arranged,

[0040] Figure 2c Show Figure 2a and Figure 2b Detailed schematic diagram in the edge area of the recess,

[0041] Figure 3 Show Figure 2a A development of the example of , in which a magnetic conductor is arranged in the region of the edge of the recess for electromagnetic shielding of a magnetic field coupled into the inductive charging device,

[0042] Figures 4a to 4c Show Figure 3 Detailed illustration of an example of an embodiment of the present invention in the region of a recess edge with a magnetic conductor arranged on the recess edge. DETAILED DESCRIPTION

[0043] Figure 1 A motor vehicle 30 according to the present invention is shown. The motor vehicle 30 may be a hybrid vehicle or an electric vehicle. The motor vehicle 30 includes a vehicle interior 31 and an electric drive system (not shown) for driving the motor vehicle 30. The motor vehicle 30 also includes a battery system 25 according to the present invention, which is used to supply electrical energy to the electric drive system.

[0044] according to Figure 1 The battery system 25 is arranged in a lower region 33 of a motor vehicle 30 between a vehicle interior 31 and a lower floor 32 of the motor vehicle 30. The battery system 25 according to the invention comprises a battery housing 1 according to the invention, which delimits a housing interior 4. Furthermore, the battery system 25 according to the invention comprises a traction battery 20, which is arranged in the housing interior 4 of the battery system 25 and has a plurality of rechargeable battery cell modules 21.

[0045] Figure 2a and Figure 2b Along the Figure 1 A battery system 25 according to the invention is shown by way of example in a longitudinal section in the vehicle longitudinal direction L of a motor vehicle 30 of FIG. Figure 2b yes Figure 2a Detailed schematic diagram of the battery housing 1. The battery housing 1 comprises an upper housing part 2 and a lower housing part 3 lying opposite the upper housing part 2, which together delimit a housing interior 4. The upper housing part 2 faces the vehicle interior 31, and the lower housing part 3 faces the lower floor 32 of the motor vehicle 30 (see Figure 1 ).

[0046] The battery housing 1 can be as shown in Figure 2a As shown in the longitudinal section of FIG, the housing is realized in two parts—composed of an upper housing part 2 and a lower housing part 3. In this case, as shown in the figure, the upper housing part 2 can be configured in a pot-shaped manner with a housing pot bottom 2a and two housing flanges 2b, 2c protruding from the housing pot bottom 2a at the end sides, and can also have a housing opening 2d. In this scenario, the lower housing part 3 can be configured as a housing cover 3a for closing the housing opening 2d. Preferably, the housing material of the lower housing part 3 or the housing cover 3a is an electrically conductive material, in particular a metal (e.g., aluminum). The housing material of the upper housing part 2 can also be an electrically conductive material, in particular a metal (e.g., aluminum). Particularly preferably, the lower housing part 3 and the upper housing part 2 can be configured with a unified material.

[0047] In the illustrated longitudinal section of battery housing 1 , lower housing part 3 delimits a groove-like recess 5 , which serves to accommodate a mobile inductive charging device 26 . Figure 2b The battery housing 1 is shown in the region of the depression 5. The groove depth t of the groove-shaped depression 5 measured along the vertical direction V of the battery housing 1, which extends orthogonally to the longitudinal direction L of the battery housing 1, is between 10 mm and 40 mm.

[0048] The inductive charging device 26 of the battery system 25, which is completely arranged in the recess 5, serves to charge the traction battery 20. For this purpose, the inductive charging device 26 is electrically connected to the traction battery 20. The inductive charging device 26 comprises at least one Figure 2b A coil 27, which is indicated only schematically, is used to receive an alternating electromagnetic field. Power / control electronics 22, which are electrically connected to a charging device 26 and are used to control the inductive charging device 26, can be arranged in interior region 4a of housing interior 4, which is arranged between recess 5 and upper housing part 2. The power / control electronics 22 can also be arranged to control the inductive charging device 26, as well as an electrical connection unit 24 for traction battery 20.

[0049] In the region of the recess 5, two electrical leads 15a, 15b can be provided on the lower housing part 3. These electrical leads allow the power / control electronics 22, which are arranged in the interior region 4a between the upper housing part 2 and the recess 5, to be electrically led out of the housing interior 4. For this purpose, the electrical leads 15a, 15b can each include a plug-in electrical contact 16a, 16b, into which the power / control electronics 22 can be mechanically plugged.

[0050] Furthermore, in the longitudinal section shown, mechanical reinforcement elements 18a, 18b made of plastic are arranged in each case on outer side 9 of lower housing part 3 facing away from housing interior 4 in the region of two tank flanges 8a, 8b. Respective reinforcement elements 18a, 18b may include or delimit screw receptacles 19a, 19b for receiving plastic screws. Inductive charging device 26 can thus be releasably fastened around lower housing part 3 by means of corresponding screw connections (not shown).

[0051] The mobile charging device 26 works together with the fixed charging device 35 for wireless inductive energy transmission from the fixed charging device 35 to the mobile charging device 26 (at Figure 2a ), which is roughly schematically indicated in FIG. 3 , and is fixedly arranged on a roadway (not shown) on which a motor vehicle 30 can travel.

[0052] In the longitudinal section shown, the depression 5 tapers conically toward the housing upper part 2. Figure 2a and Figure 2b As shown, the groove-shaped recess 5 can have a pot-shaped geometry with a pot bottom 6, to which two opposite ends 7a, 7b of the pot bottom are connected, each with a pot flange 8a, 8b protruding from the pot bottom 6. In the longitudinal section shown, the two pot flanges 8a, 8b are arranged at an acute angle α to the horizontally extending pot bottom 6. In the exemplary embodiment, the angle α is between 15° and 75°. Figure 2a and 2b As shown, the two angles α may be the same or may be different from each other (not shown).

[0053] The magnetic field lines FL run in the region of the tank flange 8a. Figure 2c By means of two tank flanges 8a, 8b oriented obliquely relative to a horizontal line H defined by the direction of extension of the tank bottom 6, the course of the magnetic field lines FL in the region of the two edge regions 10a, 10b is modified in such a way that an improved inductive coupling between the stationary charging device 35 and the mobile charging device 26 is achieved.

[0054] Figure 3 Show Figure 1 and an extension of the example in FIG2. Figure 3 In the longitudinal section shown, a magnetic conductor 11 is additionally arranged on the outer side 9 of the lower housing part 3 facing away from the housing interior 4, in each case on two edge regions 10a, 10b that delimit the recess 5 of the lower housing part 3. The magnetic conductor 11 can be formed by a foil 11a made of a magnetically conductive material, for example ferrite.

[0055] To clarify, Figure 4aShow Figure 3 Detailed schematic diagram of an example of , which reproduces the edge region 10a more accurately. Figure 3 and Figure 4a In the longitudinal section shown, the foil 11a has a main section 12 arranged on the corresponding edge region 10a and an extension section 13 arranged in the groove-like recess. In the longitudinal section shown, the extension section 13 is designed as a projection 14 that extends into the recess 5. Here, the extension section 13 or the projection 14 extends the main section 12 and protrudes from the main section 12 into the recess 5 at an acute angle β. The value of the angle β is the same as the angle α of the corresponding tank flange 8a, 8b relative to the tank bottom 6 (see the above explanation), so that the projection 14 can rest on the tank flange 8a. The magnetic conductor 11 or the foil 11a can be fastened to the lower housing part 3 by means of an adhesive connection material.

[0056] The mobile inductive charging device 26 may have Figure 4a The transformer core 28 is indicated in FIG. , which is made of ferrite. The magnetic conductor 11 or the ferrite foil 11 a extends in the direction toward the upper housing part 2 , ie, along the vertical direction V, at most as far as the transformer core 28 .

[0057] Figure 4b A detailed view shows Figure 3 and Figure 4a In this modification, the extension section 13 or the overhang 14 linearly extends the main section 12 , so that the recess 5 is partially covered or closed by the extension section 13 or by the overhang 14 .

[0058] According to another alternative - Figure 4c As shown in the detailed schematic diagram of FIG, the overhang 14 or the extension section 13 can be connected with, for example, Figure 4a In a similar manner, the main section 12 projects at an acute angle β. Figure 4a In contrast to the example of FIG. 1 , the projection 14 or the extension section 13 is arranged in this case at a distance from the corresponding tank flange 8a, 8b. Therefore, the value of the angle β is smaller than the value of the angle α (see FIG. 1 ). Figure 2b ).

[0059] In the example scenario, the above description of the edge area 10a (in Figures 4a to 4c The explanation shown in Figures 4a to 4c The edge region 10b is not shown in FIG.

Claims

1. A battery housing (1) for accommodating a traction battery (20) having a plurality of battery cell modules (21) of an electric vehicle or a hybrid vehicle, -in, The battery housing (1) comprises an upper housing part (2) and a lower housing part (3) lying opposite the upper housing part (2), wherein the upper housing part and the lower housing part together at least partially delimit a housing interior space (4). wherein, in a longitudinal section of the battery housing (1), the lower housing part (3) delimits a groove-shaped recess (5) for accommodating an inductive charging device (26), wherein the depression (5) tapers, preferably conically, in longitudinal section toward the housing upper part (2).

2. The battery case according to claim 1, It is characterized by: - in a longitudinal section of the battery housing (1), the lower housing part (3) has a pot-shaped geometry for forming the groove-shaped recess (5), the pot-shaped geometry having a pot bottom (6), at two mutually opposite ends (7a, 7b) of which a pot flange (8a, 8b) protruding from the pot bottom (6) respectively adjoins, - wherein, in longitudinal section, the two tank flanges (8a, 8b) are each arranged at an acute angle (α) relative to the tank bottom (6).

3. The battery case according to claim 2, It is characterized by: The acute angle (α) is between 15° and 75°.

4. The battery case according to any one of claims 1 to 3, It is characterized by: The material of the lower housing part (3) consists of or includes an electrically conductive material, at least in the region of the recess (5).

5. The battery housing according to claim 1, It is characterized by: In longitudinal section, a magnetic conductor (11) is arranged on the outer side (9) of the lower housing part (3) facing away from the housing interior (4), at least on an edge region (10) of the lower housing part (3) that delimits the recess.

6. The battery case according to claim 5, It is characterized by: The magnetic conductor (11) includes or is a foil (11a) made of a magnetically conductive material.

7. The battery case according to claim 6, It is characterized by: In longitudinal section, the foil (11a) has a main section (12) arranged on the edge region (10) and an extension section (13) arranged in the groove-shaped depression (5).

8. The battery case according to claim 7, It is characterized by: In longitudinal section, the extension section (13) is designed as a projection (14) that projects into the depression (5), In longitudinal section, the projection (14) extends the main section (12) linearly or projects from the main section (12) at an acute angle (β) into the depression (5).

9. The battery housing according to claim 8, when at least referring to claim 2, It is characterized by: - the projection (14) rests on the tank flange (7a, 7b); or The projection (14) protrudes into the recess (5) at an angle and is arranged at a distance from the tank flange (7a, 7b).

10. The battery case according to any one of claims 5 to 9, It is characterized by: The material of the magnetic conductor (11) or the foil (11a) is ferrite, or the ferrite material occupies a volume fraction of more than 50% of the magnetic conductor (11) or the foil (11a).

11. The battery housing according to claim 1, It is characterized by: The groove depth (t) of the groove-shaped recess (5) measured along the vertical direction (V) of the battery housing (1) is between 10 mm and 40 mm.

12. The battery housing according to claim 1, It is characterized by: In the lower housing part (3), in the region of the recess (5), at least one electrical conduction (15a, 15b), preferably two electrical conductions (15a, 15b), are formed, by means of which power / control electronics (22) arranged in an interior region (4a) between the upper housing part (22) and the recess (5) in the housing interior (4) can be electrically led out of the housing interior (4).

13. The battery case according to claim 12, It is characterized by: The at least one electrical conduction (15a, 15b) is designed as a plug-in electrical contact (16a, 16b) or comprises a plug-in electrical contact into which the power / control electronics (22) can be mechanically plugged.

14. The battery housing according to claim 1, It is characterized by: In longitudinal section, mechanical reinforcement elements (18a, 18b) made of plastic are arranged on the outer side (9) of the lower housing part (3) facing away from the housing interior (4) in the region of the recess (5), preferably in the region of the tank flange (8).

15. The battery case according to claim 14, It is characterized by: At least one reinforcing element (18a, 18b) comprises a screw receptacle (19a, 19b) for a plastic screw.

16. A battery system (25) for a motor vehicle having an electric drive, - having a battery housing (1) according to any of the preceding claims, - a rechargeable traction battery (20) which is arranged in the housing interior (4) and has a plurality of battery cell modules (21), - an inductive charging device (26) for charging the traction battery (20), the inductive charging device being arranged in the recess (5), -in, The charging device (26) has at least one induction coil (27) for receiving an alternating electromagnetic field.

17. The battery system according to claim 16, It is characterized by: The inductive charging device (26) is completely arranged in the recess (5).

18. The battery system according to claim 16 or 17, It is characterized by: A power / control electronics unit (22) electrically connected to the charging device (21) is arranged in an interior area (4a) of the housing interior (4) between the recess (5) and the upper housing part (2).

19. The battery system according to any one of claims 16 to 18, when at least referring to claim 5, It is characterized by: The magnetic conductor (11) extends in the transverse direction at most as far as the inductive charging device (26).

20. The battery system according to claim 19, It is characterized by: - the inductive charging device (26) has a transformer core (28) made of ferrite, The magnetic conductor (11) extends in the direction toward the upper housing part (2), in particular in the vertical direction (VR), at most as far as the transformer core (28).

21. A motor vehicle (30) having an electric drive, in particular a hybrid vehicle or an electric vehicle, - having a vehicle interior space (31), - having an electric drive system for driving the motor vehicle, A battery system (25) according to any one of claims 16 to 20 for supplying electrical energy to the electric drive system.

22. The motor vehicle according to claim 21, It is characterized by: the battery system (25) is arranged in a lower region (31) of the motor vehicle (30) between the vehicle interior (31) and a lower floor (32) of the motor vehicle (30), wherein the upper housing part (2) faces the vehicle interior (31) and the lower housing part (3) with the mobile sensing device (26) faces the lower base (32).

Images