Propulsion device for a vehicle, and vehicle

Abstract

The invention relates to a propulsion device (10) for a vehicle (1) and to a vehicle (1), in particular a hybrid or electric vehicle, comprising a propulsion device of this kind. The propulsion device comprises a first electric axle (E1), a second electric axle (E2), and a central coolant distributor (11) which is fluidically connected to the first electric axle (E1) and to the second electric axle (E2) by means of a coolant circuit (12), the second electric axle (E2) having a second coolant pump (P2).

Description

[0001] Description

[0002] title

[0003] Drive device for a vehicle and vehicle

[0004] The present invention relates to a drive device for a vehicle and to a vehicle, in particular a hybrid or electric vehicle, with such a drive device.

[0005] State of the art

[0006] Hybrid or electric vehicles powered by an electric axle (e-axle) comprise an electric motor, an inverter, and optionally a transmission, which are cooled via a coolant distributor. In the prior art, e-axles are technical solutions that describe the electric motor, the inverter, and the transmission as a common assembly. The common assembly may include additional components, such as a coolant pump, a valve, or lines. The components may be configured inside or outside a housing, forming the common assembly in both cases. This means that everything does not necessarily have to be enclosed by a single housing. Not everything has to be "fully" integrated into the housing. In particular, if each component is located outside the housing, it can be attached to the housing.

[0007] An electric axle is generally cooled using cooling water. There are two main solutions. One is water-cooled, the inverter and electric motor. The other is water-cooled, the inverter, and the electric motor, oil-cooled. In the latter case, the heat is transferred from the oil to the water via an oil cooler. In both solutions, the waste heat from the electric axle is ultimately dissipated via the cooling water.

[0008] For drives with two electric axes, four solutions are currently known for cooling both electric axes:

[0009] Solution 1: The cooling water flows through the components of the electric axles in series. Both electric axles are always flowing through. The electric axle through which the cooling water flows first can be the main axle A, where the cooling water flows through inverter A, electric motor A, inverter B, and electric motor B, or the secondary axle B, where the cooling water flows through inverter B, electric motor B, inverter A, and electric motor A. The main axle can be located at the front or rear of the vehicle. This results in the following three sub-solutions:

[0010] - The main axis is located at the rear and is the first to be flowed through.

[0011] - The main axle is located at the rear and has a secondary air flow.

[0012] - The main axis is located at the front and is the first to be flowed through.

[0013] Solution 2: The cooling water flows through the components of the electric axles serially in the order of front inverter, rear inverter, rear electric motor, and front electric motor. The cooling water always flows through both electric axles. The main axle can be located at the front or rear of the vehicle. This results in two sub-solutions:

[0014] - The main axle is located at the rear.

[0015] - The main axis is located at the front.

[0016] Solution 3: The cooling water always flows through the electric axes in parallel, with the inverter flowing first in each of the electric axes, followed by the electric motor. The total cooling water flow is split into two partial mass flows upstream of the electric axes. The flow is split according to the flow resistances. Cooling water bypass is not possible.

[0017] Solution 4: The cooling water always flows through the electric axes in parallel, with the inverter flowing first in each of the electric axes, followed by the electric motor. The total cooling water flow is split into two partial mass flows upstream of the electric axes. The splitting is achieved using a distribution valve, allowing the respective partial mass flows to be precisely adjusted. A cooling water bypass for one of the electric axes is also possible.

[0018] Generally, thermal management in a hybrid or electric vehicle is usually carried out with distributed components, such as cooling water pumps and valves. A well-known alternative to this replaces all cooling water valves with a central multi-port valve and arranges the cooling water pumps directly on the central

[0019] Multiport valve. For example, US 2022 / 0314735 A1 describes systems, devices, and methods for an improved heat pump for use in motor vehicles. An exemplary embodiment includes a housing, the housing having a certain number of port openings, each port opening being connected to a component of the electric vehicle, the port openings being configured to allow a fluid to pass therethrough; and a main housing positioned within the housing, the main housing comprising a plurality of channels, at least a portion of the channels being in fluid communication with the

[0020] Connection openings, wherein the main housing is designed to rotate within the housing, and wherein the rotation causes an adjustment of the connection openings corresponding to the channels.

[0021] One difficulty with these known solutions is that the central thermal management module, such as the central multiport valve, must be expanded when a second electric axle is integrated into the vehicle. This requires a larger or additional coolant pump, a larger or additional coolant valve, more internal connections, more external connections, and the like. This increases the size of the central thermal management module, which can create a space conflict or increase integration effort. Furthermore, the number of variants and / or costs can increase.

[0022] Disclosure of the invention The invention provides a drive device for a vehicle having the features of claim 1 and / or a vehicle having the features of claim 16.

[0023] According to a first aspect of the invention, a drive device for a vehicle is provided. The drive device comprises a first electric axle and a second electric axle. Furthermore, the drive device comprises a central coolant distributor, which is fluidly connected to the first electric axle and the second electric axle via a coolant circuit. The second electric axle has a second coolant pump.

[0024] According to a second aspect of the invention, a vehicle, in particular a hybrid or electric vehicle, is provided with a drive device according to the first aspect of the invention.

[0025] One idea underlying the present invention is to provide an electric axle with integrated thermal management, wherein coolant pumps and coolant valves are arranged essentially within the central coolant distributor – regardless of whether the vehicle comprises one electric axle or two electric axles. The first electric axle can also be referred to as the main axle. The second electric axle can also be referred to as the secondary axle. Both electric axles are suitable for driving the vehicle. For example, the first electric axle, or the main axle, can provide a greater maximum power than the second electric axle, or the secondary axle.

[0026] Alternatively or additionally, the second electrical axis can be designed so that it can be switched on or off. Furthermore, the first electrical axis or the main axis can be designed essentially like the second electrical axis or the secondary axis. The central coolant distributor can be designed to circulate a coolant in the coolant circuit. The central coolant distributor can have a multi-way valve and / or at least one coolant pump. In particular, one of the at least one coolant pumps of the central coolant distributor can be assigned to the coolant circuit and designed to pump the coolant in the coolant circuit. The coolant can be water or oil, for example. In particular, the second coolant pump shares a common housing with the second electrical axis.

[0027] An advantage of the present invention is that when using the second electric axis with the second coolant pump according to the invention, the central coolant distributor does not need to be modified. This means that the thermal management system or the central coolant distributor can be expanded together with the second electric axis, for example, as a so-called "plug-and-play solution." Consequently, the central coolant distributor of a 2-axis drive, in particular, can remain unchanged compared to that of a 1-axis drive.

[0028] A further advantage is that space conflicts at the installation location of the coolant distributor or drive unit can be reduced or eliminated. Furthermore, integration effort can be reduced by eliminating the need for a larger coolant distributor and by eliminating a second connection between the electric axles and the coolant distributor.

[0029] Advantageously, the drive device according to the invention can reduce the number of variants of the coolant distributor by shifting the variance to the second electrical axis. This allows for better tailoring of the modules and also increases basic functionality.

[0030] Advantageous embodiments and further developments emerge from the further subclaims and from the description with reference to the figures of the drawing.

[0031] According to a further development of the invention, the second electric axle has a second electric machine, with the second coolant pump being arranged upstream of the second electric machine. In this way, a flow pressure or flow velocity upstream of the second electric machine can be brought to a desired minimum level.

[0032] According to a further development of the invention, the second electric axle has a second electric machine, with the second coolant pump being arranged downstream of the second electric machine. In this way, a flow pressure loss or a reduction in flow velocity downstream of the second electric machine can be compensated.

[0033] According to a further development of the invention, the second electric axis has a second inverter, with the second coolant pump being arranged upstream of the second inverter. In this way, a flow pressure or flow velocity upstream of the second inverter can be brought to a desired minimum level.

[0034] According to a further development of the invention, the second electric axis has a second inverter, with the second coolant pump being arranged downstream of the second inverter. In this way, a flow pressure loss or a reduction in flow velocity downstream of the second inverter can be compensated.

[0035] According to a further development of the invention, the second electric axis has a second bypass path for bypassing the second inverter and / or the second electric machine. Thus, a cooling function can be reduced or avoided for at least one component of the second electric axis by allowing at least a portion of a mass flow of the coolant to flow through the second bypass path.

[0036] Furthermore, the second bypass path can bypass the second coolant pump. This means that the second inverter or the second electric machine, or both, and optionally the second coolant pump, can be arranged in a main path of the coolant circuit running parallel to the second bypass path. The second bypass path can run in a housing of the second electric axis. In particular, the second bypass path can be part of the coolant circuit.

[0037] According to a further development of the invention, the second electric axis has a valve device for varying a flow rate through the second bypass path. In this way, the flow rate through the second bypass path can be controlled. The valve device can, in particular, be designed to vary the flow rate of the coolant through the second bypass path.

[0038] According to a further development of the invention, the valve device is designed as a 3-way valve and is arranged at a bifurcation point of the second bypass path relative to the coolant circuit. The bifurcation point corresponds, for example, to a branch or a junction of the second bypass path.

[0039] According to a further development of the invention, the valve device is designed as a shut-off valve and arranged in the second bypass path.

[0040] According to a further development of the invention, the first electric axis has a first bypass path for bypassing the second electric axis. Thus, a cooling function in the second electric axis can be reduced or avoided by having at least a portion of a mass flow of the coolant flow through the first bypass path.

[0041] Furthermore, the first bypass path can bypass the second coolant pump. This means that the second inverter, the second electric motor, and the second coolant pump can be arranged in a main path of the coolant circuit that runs parallel to the first bypass path. The bypass path can then only run in a housing of the first electric axis. In particular, the first bypass path can be part of the coolant circuit.

[0042] According to a further development of the invention, the first electric axis has a valve device for varying a flow rate through the first bypass path. In this way, the flow rate through the first bypass path can be controlled. The valve device can, in particular, be designed to vary the flow rate of the coolant through the first bypass path.

[0043] According to a further development of the invention, the valve device is designed as a 3-way valve and is arranged at a bifurcation point of the first bypass path relative to the coolant circuit. The bifurcation point corresponds, for example, to a branch or a junction of the first bypass path.

[0044] According to a further development of the invention, the valve device is designed as a shut-off valve and arranged in the first bypass path.

[0045] For example, the valve device can share a common housing with the first electrical axis or the second electrical axis, or it can be arranged, in particular attached, preferably screwed to the housing of the first or second electrical axis. The valve device can be designed, for example, as a proportional valve. In particular, the 3-way valve can be designed as a 3-way proportional valve. In particular, the shut-off valve can be designed as a shut-off proportional valve. Optionally, the second coolant pump can have a blocking function for blocking a coolant flow. In particular, the blocking function can be non-overflowable.

[0046] According to a further development of the invention, the second electrical axis further comprises a branching unit for parallel flow through the first and second electrical axes, wherein the branching unit is arranged upstream of a second inverter and / or a second electrical machine of the second electrical axis. Thus, the coolant can flow through both electrical axes without having been previously heated by the other electrical axis. In this way, both electrical axes can be cooled by the coolant at a similar temperature. The second coolant pump can be arranged, for example, downstream of the branching unit and upstream of the second inverter or downstream of the branching unit and upstream of the first inverter. The branching unit can be designed as a 3-way valve or as a T-piece.

[0047] According to a further development of the invention, the coolant circuit runs through the first electrical axis or the second electrical axis, in particular twice in each case. In other words, the coolant circuit, in particular its cooling channel or main path, runs, for example, twice in a housing of the first or the second electrical axis. This means that the coolant flows, for example, upstream and downstream of the first electrical axis through the second electrical axis. It can also mean that the coolant flows, for example, upstream and downstream of the second electrical axis through the first electrical axis.

[0048] Optionally, the first electric axle may include a first inverter and a first electric machine. Preferably, the first inverter may be arranged upstream of the first electric machine, but is not limited thereto. Alternatively, the first inverter may be arranged downstream of the first electric machine. Furthermore, the second inverter may be arranged upstream of the second electric machine, but is not limited thereto. Alternatively, the second inverter may be arranged downstream of the second electric machine.

[0049] Furthermore, three variants for cooling the first and second electrical machines are conceivable by way of example. In a first variant, the coolant can cool at least one component of the electrical machine directly. In a second variant, the electrical machine itself can have a heat exchanger. For example, components of the electrical machine, such as windings or stator, can themselves be cooled with oil. Heat can therefore be exchanged between the coolant and the oil via the additional heat exchanger. In this way, it can be prevented that the coolant, in particular water, comes into contact with electrically conductive components and a short circuit occurs. The second variant therefore represents an indirect solution. In a third variant, one component of the electrical machine can be cooled with oil and another component with coolant, in particular directly.The third variant thus represents a hybrid solution of the first variant in combination with the second variant. Furthermore, the first inverter and / or the second inverter can be cooled mutatis mutandis according to the first, second or third variant.

[0050] The above developments can be combined with one another as desired, where appropriate. In particular, all features of the device are transferable to the associated method, and vice versa. Further possible embodiments, developments, and implementations of the invention also include combinations of features of the invention not explicitly mentioned above or described below with regard to the exemplary embodiments. In particular, the person skilled in the art will also add individual aspects as improvements or additions to the respective basic form of the present invention.

[0051] The invention is explained below with reference to the figures of the drawings. The figures show:

[0052] Fig. 1 is a schematic representation of a vehicle with a drive device according to an embodiment of the invention, wherein a refrigerant-dominant thermal system is provided;

[0053] Fig. 2 is a schematic representation of a vehicle with a drive device according to a further embodiment of the invention, wherein a coolant-dominant thermal system is provided;

[0054] Fig. 3 is a schematic representation of a drive device according to a further embodiment of the invention, wherein a second electric axis has a second bypass path with a 3-way valve;

[0055] Fig. 4 is a schematic representation of a drive device according to a further embodiment of the invention, wherein a second electrical axis has a second bypass path with a shut-off valve;

[0056] Fig. 5 is a schematic representation of a drive device according to a further embodiment of the invention, wherein a coolant circuit passes through the second electrical axis twice;

[0057] Fig. 6 is a schematic representation of a drive device according to a further embodiment of the invention, wherein a coolant first flows through a second electrical axis and then through a first electrical axis;

[0058] Fig. 7 is a schematic representation of a drive device according to a further embodiment of the invention, wherein a coolant circuit passes through the second electrical axis twice;

[0059] Fig. 8 is a schematic representation of a drive device according to a further embodiment of the invention, wherein a first electrical axis has a first bypass path with a 3-way valve;

[0060] Fig. 9 is a schematic representation of a drive device according to a further embodiment of the invention, wherein a first electrical axis has a first bypass path with a shut-off valve;

[0061] Fig. 10 is a schematic representation of a drive device according to a further embodiment of the invention, wherein a second electric axle has a second bypass path and is arranged at a rear;

[0062] Fig. 11 is a schematic representation of a drive device according to a further embodiment of the invention, wherein a first electrical axis and a second electrical axis each have an inverter and an electrical machine, wherein the two inverters are first passed through by current;

[0063] Fig. 12 is a schematic representation of a drive device according to a further embodiment of the invention, wherein a second inverter and a second electric machine of a second electric axis each have a second bypass path;

[0064] Fig. 13 is a schematic representation of a drive device according to a further embodiment of the invention, wherein a first electrical axis and a second electrical axis each have an inverter and an electrical machine, wherein the two inverters are first flowed through, and wherein the first electrical axis further has a first bypass path;

[0065] Fig. 14 is a schematic representation of a drive device according to a further embodiment of the invention, wherein a first electrical axis and a second electrical axis each have an inverter and an electrical machine, wherein the two inverters are first flowed through, and wherein the second electrical axis further has a second bypass path;

[0066] Fig. 15 is a schematic representation of a drive device according to a further embodiment of the invention, wherein a second electrical axis has a branching unit; and

[0067] Fig. 16 is a schematic representation of a drive device according to a further embodiment of the invention, wherein a second electrical axis has a branching unit and a shut-off valve.

[0068] In the figures, like reference numerals designate like or functionally equivalent components unless otherwise indicated. The accompanying figures are intended to provide a further understanding of embodiments of the invention and, in conjunction with the description, serve to explain principles and concepts of the invention. Other embodiments and many of the noted advantages will be apparent from view of the drawings. The drawings are to be understood as schematic drawings only, and elements of the drawings are not necessarily to scale. Directional terminology such as "top", "bottom", "left", "right", "above", "below", "horizontal", "vertical", "front", "rear" and similar terms are used for explanatory purposes only and are not intended to limit generality to specific embodiments shown in the figures.

[0069] Fig. 1 shows a schematic representation of a vehicle 1 with a drive device 10 according to an embodiment of the invention, wherein a refrigerant-dominant thermal system is provided.

[0070] The vehicle 1 here comprises, for example, a heat pump 2, a vehicle cabin 3, an environment 4 and optionally a battery unit 5.

[0071] The drive device 10 comprises, for example, a first electrical axis E1, a second electrical axis E2 and a central coolant distributor 11. The central coolant distributor 11 is fluidly connected to the first electrical axis E1 and to the second electrical axis E2 by a coolant circuit 12. The second electrical axis E2 has a second coolant pump P2. Here, the central coolant distributor 11 comprises, for example, a multi-way valve or a valve block V and two coolant pumps P. One of the two coolant pumps P of the central coolant distributor 11 is assigned to the coolant circuit 12 and designed to pump the coolant in the coolant circuit 12.

[0072] The heat pump 2 can be designed, for example, as a compact heat pump. The heat pump 2 contains, for example, a heat sink that provides cold and a heat source that provides heat. A refrigerant, for example, propane (R290), CO2 (R744), or R1234yf, serves as the operating medium of the heat pump 2. For example, the heat pump 2 can be fluidly connected to the valve block V in order to temperature-control the coolant using the refrigerant, in particular via one or more heat exchangers.

[0073] Persons can be present in the vehicle cabin 3. The vehicle cabin 3 can be fluidically connected to the heat pump 2 in order to regulate the temperature of the vehicle cabin 3 using the refrigerant. The vehicle cabin 3 can have an evaporator for cooling and a condenser for heating the vehicle cabin 3. The fluidic connection between the vehicle cabin 3 and the heat pump 2 creates a refrigerant-dominant thermal system.

[0074] The environment 4 corresponds to an environment of the vehicle 1, i.e. outside a body of the vehicle 1.

[0075] Optionally, the battery 5 can be coupled to the coolant-dominant thermal system, as schematically illustrated in Fig. 1. One of the two coolant pumps P of the coolant distributor 11 can be assigned to a coolant circuit for the battery 5. The coolant pump can also be formed in the battery.

[0076] For example, the first electrical axle E1 can have a first inverter INV1 and a first electrical machine EM1. The second electrical axle E2 can have a second inverter INV2 and a second electrical machine EM2. The first electrical axle E1 is shown in Fig. 1 as the rear axle of the vehicle 1, but can also be integrated as the front axle of the vehicle 1. In the exemplary embodiment according to Fig. 1, the coolant circulates from the coolant distributor 11, first through the first electrical axle E1 and then through the second electrical axis E2, but is not limited to this flow direction. Alternatively, the coolant can circulate first through the second electrical axis E2 and then through the first electrical axis E1. Fig.2 shows a schematic representation of a vehicle 1 with a drive device 10 according to a further embodiment of the invention, wherein a coolant-dominant thermal system is provided.

[0077] The vehicle 1 in Fig. 2 essentially has the same features as the vehicle from Fig. 1, unless described otherwise. In contrast to Fig. 1, the vehicle cabin 3 here is fluidly connected, for example, to the valve block V of the coolant distributor 11. Accordingly, the temperature of the vehicle cabin 3 in Fig. 2 is controlled using the coolant. The vehicle cabin 3 can have a cabin cooling unit for cooling and a cabin heating unit for heating the vehicle cabin 3. The coolant can flow through both the cabin cooling unit and the cabin heating unit. The fluidic connection of the vehicle cabin 3 to the coolant distributor 11 results in the coolant-dominant thermal system here. Such a system is also referred to as a coolant-dominant thermal system. Alternatively, the order of the first axis E1 and the second axis E2 can be reversed here.

[0078] Fig. 3 shows a schematic representation of a drive device 10 according to a further embodiment of the invention, wherein a second electrical axis E2 has a second bypass path BY2 with a 3-way valve 13.

[0079] The drive device 10 comprises, for example, a first electrical axis E1, a second electrical axis E2 and a central coolant distributor 11. The central coolant distributor 11 is fluidly connected to the first electrical axis E1 and to the second electrical axis E2 by a coolant circuit 12. The second electrical axis E2 has a second coolant pump P2. Furthermore, the central coolant distributor 11 comprises, for example, a valve block V and a coolant pump P assigned to the coolant circuit 12 for conveying a coolant through the coolant circuit 12. Here, the coolant flows from the coolant distributor 11 through the coolant circuit 12 in the order coolant pump P, first electrical axis E1, second electrical axis E2 including the second coolant pump P2. For example, the first electrical axis E1 can have a first inverter INV1 and a first electrical machine EM1.The second electric axis E2 may include a second inverter INV2 and a second electric machine EM2.

[0080] In Fig. 3, the second coolant pump P2 can be arranged upstream of the second electric machine EM2, for example. Alternatively or additionally, the second coolant pump P2 can be arranged upstream of the second inverter INV2.

[0081] Furthermore, the second electrical axis E2 here has the second bypass path BY2 for bypassing the second inverter INV2 and the second electric machine EM2. Thus, a cooling function for these components of the second electrical axis E2 can be reduced or avoided by allowing at least a portion of a mass flow of the coolant to flow through the second bypass path BY2. Furthermore, the second bypass path BY2 can bypass the second coolant pump P2. This means that the second inverter INV2, the second electric machine EM2, and the second coolant pump P2 can be arranged in a main path of the coolant circuit 12 running parallel to the second bypass path BY2.

[0082] Furthermore, the second electrical axis E2 has, for example, a valve device 13 designed as a 3-way valve for changing a flow rate through the second bypass path BY2. The valve device 13 can be designed, in particular, to change the flow rate of the coolant through the second bypass path BY2. The 3-way valve 13 can be arranged at a branch or a junction, as illustrated here by way of example, of the second bypass path BY2. However, the second bypass path BY2 does not necessarily have to have the 3-way valve 13, but can also be implemented without a valve device 13.

[0083] Fig. 4 shows a schematic representation of a drive device 10 according to a further embodiment of the invention, wherein a second electrical axis E2 has a second bypass path BY2 with a shut-off valve 13.

[0084] The drive device 10 in Fig. 4 has essentially the same features as the drive device 10 in Fig. 3, wherein the drive device 10 here, for example, has a valve device 13 designed as a shut-off valve instead of the 3-way valve. The shut-off valve 13 can be arranged in the second bypass path BY2. However, the second bypass path BY2 does not necessarily have to have the shut-off valve 13, but can also be implemented without a valve device 13.

[0085] Fig. 5 shows a schematic representation of a drive device 10 according to another embodiment of the invention, wherein a coolant circuit 12 passes through the second electrical axis E2 twice. An optional supply line is formed in the second electrical axis E2. Specifically, Fig. 5 illustrates a supply line for the drive device 10.

[0086] The drive device 10 comprises, for example, a first electrical axis E1, a second electrical axis E2 and a central coolant distributor 11. The central coolant distributor 11 is fluidly connected to the first electrical axis E1 and to the second electrical axis E2 by a coolant circuit 12. The second electrical axis E2 has a second coolant pump P2. Furthermore, the central coolant distributor 11 comprises, for example, a valve block V and a coolant pump P assigned to the coolant circuit 12 for conveying a coolant through the coolant circuit 12. Here, the coolant flows from the coolant distributor 11 through the coolant circuit 12 in the order coolant pump P, second electrical axis E2, first electrical axis E1, second electrical axis E2 including the second coolant pump P2.For example, the first electric axis E1 may have a first inverter INV1 and a first electric machine EM1. The second electric axis E2 may have a second inverter INV2 and a second electric machine EM2.

[0087] In Fig. 5, the second coolant pump P2 can be arranged upstream of the second electric machine EM2, for example. Alternatively or additionally, the second coolant pump P2 can be arranged upstream of the second inverter INV2.

[0088] Consequently, the coolant circuit 12, in particular its cooling channel or

[0089] Main path, for example, twice in a housing of the second electrical axis E2. This means that the coolant flows, for example, upstream and downstream of the first electrical axis E1 through the second electrical axis E2.

[0090] The flow line can also be used in the same way in Figures 1 -4.

[0091] Fig. 6 shows a schematic representation of a drive device 10 according to a further embodiment of the invention, wherein a coolant first flows through a second electrical axis E2 and then a first electrical axis E1.

[0092] The drive device 10 comprises, for example, a first electrical axis E1, a second electrical axis E2 and a central coolant distributor 11. The central coolant distributor 11 is fluidly connected to the first electrical axis E1 and to the second electrical axis E2 by a coolant circuit 12. The second electrical axis E2 has a second coolant pump P2. Furthermore, the central coolant distributor 11 comprises, for example, a valve block V and a coolant pump P assigned to the coolant circuit 12 for conveying a coolant through the coolant circuit 12. Here, the coolant flows from the coolant distributor 11 through the coolant circuit 12 in the order coolant pump P, second electrical axis E2 including the second coolant pump P2, first electrical axis E1. For example, the first electrical axis E1 can have a first inverter INV1 and a first electrical machine EM1.The second electric axis E2 may include a second inverter INV2 and a second electric machine EM2.

[0093] In Fig. 6, the second coolant pump P2 can be arranged downstream of the second electric machine EM2, for example. Alternatively or additionally, the second coolant pump P2 can be arranged downstream of the second inverter INV2.

[0094] In addition, the second electrical axis E2 has a second

[0095] Bypass path BY2 for bypassing the second inverter INV2 and the second electric machine EM2. Thus, a cooling function for these components of the second electric axis E2 can be reduced or avoided by having at least a portion of a mass flow of the coolant flow through the second bypass path BY2. Furthermore, the second bypass path BY2 can bypass the second coolant pump P2. This means that the second inverter INV2, the second electric machine EM2, and the second coolant pump P2 can be arranged in a main path of the coolant circuit 12 running parallel to the second bypass path BY2.

[0096] Fig. 7 shows a schematic representation of a drive device 10 according to another embodiment of the invention, wherein a coolant circuit 12 passes through the second electrical axis E2 twice. Specifically, Fig. 7 illustrates a return line for the drive device 10.

[0097] The drive device 10 comprises, for example, a first electrical axis E1, a second electrical axis E2 and a central coolant distributor 11. The central coolant distributor 11 is fluidly connected to the first electrical axis E1 and to the second electrical axis E2 by a coolant circuit 12. The second electrical axis E2 has a second coolant pump P2. Furthermore, the central coolant distributor 11 comprises, for example, a valve block V and a coolant pump P assigned to the coolant circuit 12 for conveying a coolant through the coolant circuit 12. Here, the coolant flows from the coolant distributor 11 through the coolant circuit 12 in the order coolant pump P, second electrical axis E2 including the second coolant pump P2, first electrical axis E1, second electrical axis E2.For example, the first electric axis E1 may have a first inverter INV1 and a first electric machine EM1. The second electric axis E2 may have a second inverter INV2 and a second electric machine EM2.

[0098] In Fig. 7, the second coolant pump P2 can be arranged downstream of the second electric machine EM2, for example. Alternatively or additionally, the second coolant pump P2 can be arranged downstream of the second inverter INV2. Consequently, the coolant circuit 12, in particular its cooling channel or main path, runs, for example, twice in a housing of the second electric axis E2. This means that the coolant flows, for example, upstream and downstream of the first electric axis E1 through the second electric axis E2.

[0099] The optional return line can also be used in the same way in Figure 6.

[0100] Furthermore, the second electrical axis E2 here has a second bypass path BY2 for bypassing the second inverter INV2 and the second electrical machine EM2. Thus, a cooling function for these components of the second electrical axis E2 can be reduced or avoided by allowing at least a portion of a mass flow of the coolant to flow through the second bypass path BY2. Furthermore, the second bypass path BY2 can bypass the second coolant pump P2. This means that the second inverter INV2, the second electrical machine EM2, and the second coolant pump P2 can be arranged in a main path of the coolant circuit 12 running parallel to the second bypass path BY2.

[0101] Furthermore, the second electrical axis E2 has, for example, a valve device 13 designed as a 3-way valve for changing a flow rate through the second bypass path BY2. The valve device 13 can be designed, in particular, to change the flow rate of the coolant through the second bypass path BY2. The 3-way valve 13 can be arranged at a branch or a junction, as illustrated here by way of example, of the second bypass path BY2. However, the second bypass path BY2 does not necessarily have to have the 3-way valve 13, but can also be implemented with a valve device 13 designed as a shut-off valve or without a valve device 13.

[0102] Fig. 8 shows a schematic representation of a drive device 10 according to a further exemplary embodiment of the invention, wherein a first electrical axis E1 has a first bypass path BY1 with a 3-way valve 13. The drive device 10 comprises, for example, a first electrical axis E1, a second electrical axis E2, and a central coolant distributor 11. The central coolant distributor 11 is fluidly connected to the first electrical axis E1 and to the second electrical axis E2 via a coolant circuit 12. The second electrical axis E2 has a second coolant pump P2. Furthermore, the central coolant distributor 11 comprises, for example, a valve block V and a coolant pump P assigned to the coolant circuit 12 for conveying a coolant through the coolant circuit 12.Here, the coolant flows from the coolant distributor 11 through the coolant circuit 12 in the following order: coolant pump P, first electric axis E1, second electric axis E2, including the second coolant pump P2, and first electric axis E1. For example, the first electric axis E1 can have a first inverter INV1 and a first electric machine EM1. The second electric axis E2 can have a second inverter INV2 and a second electric machine EM2.

[0103] In Fig. 8, the second coolant pump P2 can be arranged upstream of the second electric machine EM2, for example. Alternatively or additionally, the second coolant pump P2 can be arranged upstream of the second inverter INV2.

[0104] In addition, the first electrical axis E1 here has the first bypass path BY1 for bypassing the second electrical axis E2. Thus, a cooling function in the second electrical axis E2 can be reduced or avoided by at least part of a mass flow of the coolant flowing through the first bypass path BY1. Furthermore, the first bypass path BY1 can bypass the second coolant pump P2. This means that the second inverter INV2, the second electrical machine EM2 and the second coolant pump P2 can be arranged in a main path of the coolant circuit 12 running parallel to the first bypass path BY1. In this case, the first bypass path BY1 can run in a housing of the first electrical axis E1. In particular, the first bypass path BY1 can be part of the coolant circuit 12.Furthermore, the first electrical axis E1 has, for example, a valve device 13 designed as a 3-way valve for changing a flow rate through the first bypass path BY1. The valve device 13 can be designed, in particular, to change the flow rate of the coolant through the first bypass path BY1. The 3-way valve 13 can be arranged at a branch or a junction, as illustrated here by way of example, of the first bypass path BY1. However, the first bypass path BY1 does not necessarily have to have the 3-way valve 13, but can also be implemented without a valve device 13.

[0105] Consequently, the coolant circuit 12, in particular its cooling channel or main path, runs, for example, twice in a housing of the first electrical axis E1. This means that the coolant flows, for example, upstream and downstream of the second electrical axis E2 through the first electrical axis E1.

[0106] Fig. 9 shows a schematic representation of a drive device 10 according to a further embodiment of the invention, wherein a first electrical axis E1 has a first bypass path BY1 with a shut-off valve 13.

[0107] The drive device 10 in Fig. 9 has essentially the same features as the drive device 10 in Fig. 8, wherein the drive device 10 here, for example, has a valve device 13 designed as a shut-off valve instead of the 3-way valve. The shut-off valve 13 can be arranged in the first bypass path BY1. However, the first bypass path BY1 does not necessarily have to have the shut-off valve 13, but can also be implemented without a valve device 13.

[0108] Fig. 10 shows a schematic representation of a drive device 10 according to a further embodiment of the invention, wherein a second electric axle E2 has a second bypass path BY2 and is arranged at a rear.

[0109] The drive device 10 comprises, for example, a first electrical axis E1, a second electrical axis E2 and a central coolant distributor 11. The central coolant distributor 11 is fluidly connected to the first electrical axis E1 and to the second electrical axis E2 by a coolant circuit 12. The second electrical axis E2 has a second coolant pump P2. Furthermore, the central coolant distributor 11 comprises, for example, a valve block V and a coolant pump P assigned to the coolant circuit 12 for conveying a coolant through the coolant circuit 12. Here, the coolant flows from the coolant distributor 11 through the coolant circuit 12 in the order coolant pump P, first electrical axis E1, second electrical axis E2 including the second coolant pump P2, first electrical axis E1.For example, the first electric axis E1 may have a first inverter INV1 and a first electric machine EM1. The second electric axis E2 may have a second inverter INV2 and a second electric machine EM2.

[0110] In Fig. 10, the second coolant pump P2 can be arranged upstream of the second electric machine EM2, for example. Alternatively or additionally, the second coolant pump P2 can be arranged upstream of the second inverter INV2.

[0111] Consequently, the coolant circuit 12, in particular its cooling channel or main path, runs, for example, twice in a housing of the first electrical axis E1. This means that the coolant flows, for example, upstream and downstream of the second electrical axis E2 through the first electrical axis E1.

[0112] In addition, the second electrical axis E2 here has a second bypass path BY2 for bypassing the second inverter INV2 and the second electrical machine EM2. Thus, a cooling function for these components of the second electrical axis E2 can be reduced or avoided by at least part of a mass flow of the coolant flowing through the second bypass path BY2. Furthermore, the second bypass path BY2 can bypass the second coolant pump P2. This means that the second inverter INV2, the second electrical machine EM2, and the second coolant pump P2 can be arranged in a main path of the coolant circuit 12 running parallel to the second bypass path BY2. Furthermore, the second electrical axis E2 has, for example, a valve device 13 designed as a 3-way valve for changing a flow rate through the second bypass path BY2.The valve device 13 can be designed, in particular, to change the flow rate of the coolant through the second bypass path BY2. The 3-way valve 13 can be arranged at a branch or a junction, as illustrated here by way of example, of the second bypass path BY2. However, the second bypass path BY2 does not necessarily have to have the 3-way valve 13, but can also be implemented with a valve device 13 designed as a shut-off valve or without a valve device 13.

[0113] Accordingly, the drive device 10 in Fig. 10 differs from the drive device of Fig. 7, for example, in that the two electric axles E1, E2 are swapped with respect to the front and rear axles of the vehicle 1 and the second coolant pump P2 is arranged upstream of the second electric machine EM2 or the second inverter INV2 instead of downstream of them.

[0114] Fig. 11 shows a schematic representation of a drive device 10 according to a further embodiment of the invention, wherein a first electrical axis E1 and a second electrical axis E2 each have an inverter INV1, INV2 and an electrical machine EM1, EM2, wherein the two inverters INV1, INV2 are first flowed through.

[0115] The drive device 10 comprises, for example, a first electrical axis E1, a second electrical axis E2 and a central coolant distributor 11. The central coolant distributor 11 is fluidly connected to the first electrical axis E1 and to the second electrical axis E2 by a coolant circuit 12. The second electrical axis E2 has a second coolant pump P2. Furthermore, the central coolant distributor 11 comprises, for example, a valve block V and a coolant pump P assigned to the coolant circuit 12 for conveying a coolant through the coolant circuit 12. Here, the coolant flows from the coolant distributor 11 through the coolant circuit 12 in the following order: coolant pump P, second inverter INV2, second coolant pump P2, first inverter INV1, first electrical machine EM1, second electrical machine EM2.

[0116] In Fig. 11, the second coolant pump P2 can be arranged upstream of the second electric machine EM2, for example. Alternatively or additionally, the second coolant pump P2 can be arranged downstream of the second inverter INV2. Specifically, the second coolant pump P2 can be arranged upstream of the first inverter INV1, i.e., preferably between the second inverter INV2 and the first inverter INV1.

[0117] Furthermore, the second electrical axis E2 here each has a second bypass path BY2 for bypassing the second inverter INV2 or the second electrical machine EM2. Thus, a cooling function for these components of the second electrical axis E2 can be reduced or avoided by at least a portion of a mass flow of the coolant flowing through the second bypass path BY2. Furthermore, the second bypass path BY2 can bypass the second coolant pump P2. This means that the second inverter INV2 and the second coolant pump P2 or the second electrical machine EM2 can each be arranged in a main path of the coolant circuit 12 running parallel to the respective second bypass path BY2.

[0118] Furthermore, the second electrical axis E2 has, for example, two valve devices 13 designed as shut-off valves for changing a flow rate through the respective second bypass path BY2. The valve device 13 can be designed, in particular, to change the flow rate of the coolant through the respective second bypass path BY2. The shut-off valve 13 can be arranged in each of the second bypass paths BY2. However, the second bypass path BY2 does not necessarily have to have two shut-off valves 13, but can also be implemented as one or two valve devices 13 designed as 3-way valves without a valve device 13.

[0119] Fig. 12 shows a schematic representation of a drive device 10 according to a further embodiment of the invention, wherein a second inverter INV2 and a second electric machine EM2 of a second electric axis E2 each have a second bypass path BY2.

[0120] The drive device 10 in Fig. 12 has essentially the same features as the drive device 10 from Fig. 11 , wherein the second coolant pump P2 is arranged here, for example, downstream of the first electrical machine EM1 , that is to say preferably between the second electrical machine EM2 and the first electrical machine EM1 .

[0121] Fig. 13 shows a schematic representation of a drive device 10 according to a further embodiment of the invention, wherein a first electrical axis E1 and a second electrical axis E2 each have an inverter INV1, INV2 and an electrical machine EM1, EM2, wherein the two inverters INV1, INV2 are first flowed through, and wherein the first electrical axis E1 further has a first bypass path BY1.

[0122] The drive device 10 comprises, for example, a first electrical axis E1, a second electrical axis E2 and a central coolant distributor 11. The central coolant distributor 11 is fluidly connected to the first electrical axis E1 and to the second electrical axis E2 by a coolant circuit 12. The second electrical axis E2 has a second coolant pump P2. Furthermore, the central coolant distributor 11 comprises, for example, a valve block V and a coolant pump P assigned to the coolant circuit 12 for conveying a coolant through the coolant circuit 12. Here, the coolant flows from the coolant distributor 11 through the coolant circuit 12 in the following order: coolant pump P, first inverter INV1, second inverter INV2, second coolant pump P2, second electrical machine EM2, first electrical machine EM1.

[0123] In Fig. 13, the second coolant pump P2 can be arranged upstream of the second electric machine EM2, for example. Alternatively or additionally, the second coolant pump P2 can be arranged downstream of the second inverter INV2. Alternatively, the coolant pump can be arranged upstream of the second inverter INV2 and the second electric machine EM2. Alternatively, the coolant pump can be arranged downstream of the second inverter INV2 and the second electric machine EM2.

[0124] In addition, the first electrical axis E1 here has the first bypass path BY1 for bypassing the second electrical axis E2. Thus, a cooling function in the second electrical axis E2 can be reduced or avoided by at least part of a mass flow of the coolant flowing through the first bypass path BY1. Furthermore, the first bypass path BY1 can bypass the second coolant pump P2. This means that the second inverter INV2, the second electrical machine EM2 and the second coolant pump P2 can be arranged in a main path of the coolant circuit 12 running parallel to the first bypass path BY1. In this case, the first bypass path BY1 can run in a housing of the first electrical axis E1. In particular, the first bypass path BY1 can be part of the coolant circuit 12.

[0125] Furthermore, the first electrical axis E1 has, for example, a valve device 13 designed as a 3-way valve for changing a flow rate through the first bypass path BY1. The valve device 13 can be designed, in particular, to change the flow rate of the coolant through the first bypass path BY1. The 3-way valve 13 can be arranged at a branch or a junction, as illustrated here by way of example, of the first bypass path BY1. However, the first bypass path BY1 does not necessarily have to have the 3-way valve 13, but can also be implemented without a valve device 13.

[0126] Fig. 14 shows a schematic representation of a drive device according to a further embodiment of the invention, wherein a first electrical axis E1 and a second electrical axis E2 each have an inverter INV1, INV2 and an electrical machine EM1, EM2, wherein the two inverters INV1, INV2 are first flowed through, and wherein the second electrical axis E2 further has a second bypass path BY2.

[0127] The drive device 10 comprises, for example, a first electrical axis E1, a second electrical axis E2 and a central coolant distributor 11. The central coolant distributor 11 is fluidly connected to the first electrical axis E1 and to the second electrical axis E2 by a coolant circuit 12. The second electrical axis E2 has a second coolant pump P2. Furthermore, the central coolant distributor 11 comprises, for example, a valve block V and a coolant pump P assigned to the coolant circuit 12 for conveying a coolant through the coolant circuit 12. Here, the coolant flows from the coolant distributor 11 through the coolant circuit 12 in the following order: coolant pump P, first inverter INV1, second inverter INV2, second coolant pump P2, second electrical machine EM2, first electrical machine EM1.

[0128] In Fig. 14, the second coolant pump P2 can be arranged upstream of the second electric machine EM2, for example. Alternatively or additionally, the second coolant pump P2 can be arranged downstream of the second inverter INV2.

[0129] Furthermore, the second electrical axis E2 here has a second bypass path BY2 for bypassing the second inverter INV2 and the second electrical machine EM2. Thus, a cooling function for these components of the second electrical axis E2 can be reduced or avoided by allowing at least a portion of a mass flow of the coolant to flow through the second bypass path BY2. Furthermore, the second bypass path BY2 can bypass the second coolant pump P2. This means that the second inverter INV2, the second electrical machine EM2, and the second coolant pump P2 can be arranged in a main path of the coolant circuit 12 running parallel to the second bypass path BY2.

[0130] Furthermore, the second electrical axis E2 has, for example, a valve device 13 designed as a 3-way valve for changing a flow rate through the second bypass path BY2. The valve device 13 can be designed, in particular, to change the flow rate of the coolant through the second bypass path BY2. The 3-way valve 13 can be arranged at a branch, as illustrated here by way of example, or at a junction of the second bypass path BY2. However, the second bypass path BY2 does not necessarily have to have the 3-way valve 13, but can also be implemented with a valve device 13 designed as a shut-off valve or without a valve device 13.

[0131] Fig. 15 shows a schematic representation of a drive device 10 according to a further embodiment of the invention, wherein a second electrical axis E2 has a branching unit 14.

[0132] The drive device 10 comprises, for example, a first electrical axis E1, a second electrical axis E2 and a central coolant distributor 11. The central coolant distributor 11 is fluidly connected to the first electrical axis E1 and to the second electrical axis E2 by a coolant circuit 12. The second electrical axis E2 has a second coolant pump P2. Furthermore, the central coolant distributor 11 comprises, for example, a valve block V and a coolant pump P assigned to the coolant circuit 12 for conveying a coolant through the coolant circuit 12. Here, the coolant flows from the coolant distributor 11 through the coolant circuit 12 in the order of coolant pump P, branching unit 14, parallel second electrical axis E2 and first electrical axis E1. For example, the first electrical axis E1 can have a first inverter INV1 and a first electrical machine EM1.The second electric axis E2 may include a second inverter INV2 and a second electric machine EM2.

[0133] In Fig. 15, the second coolant pump P2 can be arranged upstream of the first electrical machine EM1, for example. Alternatively or additionally, the second coolant pump P2 can be arranged upstream of the first inverter INV1. Specifically, the second coolant pump P2 can be arranged downstream of the branching unit 14, i.e., preferably between the branching unit 14 and the first inverter INV1 and / or between the branching unit 14 and the first electrical machine EM1.

[0134] The branching unit 14 is designed for parallel flow through the first and second electrical axes. Thus, the coolant can flow through both electrical axes E1, E2 without having been previously heated by the other electrical axis. The branching unit 14 can be designed as a 3-way valve, as illustrated in Fig. 16.

[0135] Fig. 16 shows a schematic representation of a drive device 10 according to a further embodiment of the invention, wherein a second electrical axis E2 has a branching unit and a shut-off valve 13.

[0136] The drive device 10 comprises, for example, a first electrical axis E1, a second electrical axis E2 and a central coolant distributor 11. The central coolant distributor 11 is fluidly connected to the first electrical axis E1 and to the second electrical axis E2 by a coolant circuit 12. The second electrical axis E2 has a second coolant pump P2. Furthermore, the central coolant distributor 11 comprises, for example, a valve block V and a coolant pump P assigned to the coolant circuit 12 for conveying a coolant through the coolant circuit 12. Here, the coolant flows from the coolant distributor 11 through the coolant circuit 12 in the order of coolant pump P, branching unit 14, parallel second electrical axis E2 and first electrical axis E1. For example, the first electrical axis E1 can have a first inverter INV1 and a first electrical machine EM1.The second electric axis E2 may include a second inverter INV2 and a second electric machine EM2.

[0137] In Fig. 16, the second coolant pump P2 can be arranged upstream of the second electric machine EM2, for example. Alternatively or additionally, the second coolant pump P2 can be arranged upstream of the second inverter INV2. Specifically, the second coolant pump P2 can be arranged downstream of the branching unit 14, i.e., preferably between the branching unit 14 and the second inverter INV2.

[0138] The branching unit 14 is designed for parallel flow through the first and second electrical axes. Thus, the coolant can flow through both electrical axes E1, E2 without having been previously heated by the other electrical axis. The branching unit 14 can be designed as a T-piece, as illustrated in Fig. 16. The shut-off valve 13 can be designed to vary a flow rate through the second inverter INV2 and the second electrical machine EM2.

[0139] All drive devices 10 according to the invention, in particular according to the embodiments in Figures 3 to 16, can be combined with or integrated into a refrigerant-dominant thermal system from Figure 1 or with a coolant-dominant thermal system from Figure 2.

[0140] Alternatively, the first electric axle E1 can be arranged on the front axle of the vehicle 1, with the second electric axle E2 being arranged on the rear axle. All previously described features can also be applied in the same way to this swapped axle arrangement.

[0141] In the above embodiments, water cooling of the electrical machines is described by way of example, but is not limited thereto. Alternatively, the water cooling of the electrical machines can be replaced by oil cooling. In such oil-cooled electrical machines, the cooling water flow or coolant flow can be replaced by an oil cooler.

[0142] Although the present invention has been explained above using exemplary embodiments, it is not limited thereto but can be modified in a variety of ways. In particular, combinations of the above embodiments are also conceivable.

[0143] Preferably, the first and / or second electrical axis E1, E2 each has between two and four connections for the coolant. If, for example, two connections are formed, one of the connections is designed as an inlet and one of the connections as an outlet. If, for example, four connections are formed, two of the connections are designed as an inlet and two of the connections as an outlet. According to an advantageous development, the coolant circuit, in particular its cooling channel or main path, can run in particular twice in a housing of the first electrical axis E1 and / or the second electrical axis E2. In this case, in particular the coolant cannot have any significant

[0144] Heat emission or heat absorption. In particular, the coolant flows through only one channel, in particular a line, during the first or second flow. Preferably, the coolant is guided through the channel only from a connection designed as an inlet to a connection designed as an outlet. Such a channel is shown, for example, in the

[0145] Figures 5, 7 each formed in the second electrical axis E2.

Claims

Claims 1. Drive device (10) for a vehicle (1), comprising: - a first electrical axis (E1); - a second electrical axis (E2); and - a central coolant distributor (11) which is fluidly connected to the first electrical axis (E1) and to the second electrical axis (E2) by a coolant circuit (12); wherein the second electrical axis (E2) has a second coolant pump (P2).

2. Drive device (10) according to claim 1, wherein the second electric axis (E2) has a second electric machine (EM2), wherein the second coolant pump (P2) is arranged upstream of the second electric machine (EM2) 3. Drive device (10) according to claim 1, wherein the second electric axis (E2) has a second electric machine (EM2), wherein the second coolant pump (P2) is arranged downstream of the second electric machine (EM2) 4. Drive device (10) according to one of the preceding claims, wherein the second electric axis (E2) has a second inverter (INV2), wherein the second coolant pump (P2) is arranged upstream of the second inverter (INV2) 5. Drive device (10) according to one of claims 1 to 3, wherein the second electric axis (E2) has a second inverter (INV2), wherein the second coolant pump (P2) is arranged downstream of the second inverter (INV2) 6. Drive device (10) according to one of the preceding claims, wherein the second electrical axis (E2) has a second bypass path (BY2) for bypassing the second inverter (INV2) and / or the second electrical machine (EM2) 7. Drive device (10) according to claim 6, wherein the second electric axis (E2) has a valve device (13) for changing a flow rate through the second bypass path (BY2).

8. Drive device (10) according to claim 7, wherein the valve device (13) is designed as a 3-way valve and is arranged at a bifurcation point of the second bypass path (BY2) with respect to the coolant circuit (12).

9. Drive device (10) according to claim 7, wherein the valve device (13) is designed as a shut-off valve and is arranged in the second bypass path (BY2).

10. Drive device (10) according to one of the preceding claims, wherein the first electrical axis (E1) has a first bypass path (BY1) for bypassing the second electrical axis (E2).

11. Drive device (10) according to claim 10, wherein the first electric axis (E1) has a valve device (13) for changing a flow rate through the first bypass path (BY1).

12. Drive device (10) according to claim 11, wherein the valve device (13) is designed as a 3-way valve and is arranged at a bifurcation point of the first bypass path (BY1) in relation to the coolant circuit (12).

13. Drive device (10) according to claim 11, wherein the valve device (13) is designed as a shut-off valve and is arranged in the first bypass path (BY1).

14. Drive device (10) according to one of the preceding claims, wherein the second electrical axis (E2) further comprises a branching unit (14) for parallel flow through the first and the second electrical axis, wherein the branching unit (14) is arranged upstream of a second inverter (INV2) and / or a second electric machine (EM2) of the second electric axis (E2) 15. Drive device (10) according to one of the preceding claims, wherein the coolant circuit (12) passes through the first electrical axis (E1) or the second electrical axis (E2) twice.

16. Vehicle (1), in particular a hybrid or electric vehicle, with a drive device (10) according to one of the preceding claims.

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