Device and method for cooling at least one battery

Abstract

Device for cooling at least one battery (2) and at least part of an interior (3) in a vehicle, comprising a first air conditioning system with a first air duct (51), wherein a first air flow is blown into the first air duct (51), at least part of the first air flow is cooled by a first cooling device (61) and the first air flow is blown out into the interior (3), wherein a volume flow of the first air flow is controlled via a first throttle valve (121), and at least one second air duct (52), wherein a second air flow is blown into the second air duct (52) and blown out to at least one battery (2), wherein a volume flow of the second air flow is controlled via a second throttle valve (122), wherein at least one second air conditioning system comprising at least a portion of the second air duct (52) cools at least a portion of the second air flow by a second cooling device (62), wherein the first air stream is sucked in by a central fan (4) and blown into the first air duct (51) and the second air stream is sucked in by the central fan (4) and blown into the second air duct (52), characterized in that at least a part of the second air duct (52) comprises at least one second cooling duct (82) and at least one second heating duct (92), wherein the second air flow is divided into at least one second cooling air flow flowing through the second cooling duct (82) and at least one second heating air flow flowing through the second heating duct (92), and the central fan (4) blows the second cooling air flow into the second cooling duct (82) and the second heating air flow into the second heating duct (92), or the second air flow is divided into the second cooling air flow and the second heating air flow by an active or passive second air dividing device (72), wherein a second heating device (102) is arranged in the second heating channel (92) and heats the second heating air flow.

Description

The invention relates to a method and a device for cooling at least one battery and at least part of an interior space in a vehicle.In hybrid and electric vehicles, necessary cooling of one or more batteries is often carried out by active cooling with air, wherein the air is taken from either the interior of a vehicle and / or the outside air for cooling. If the air for cooling the battery originates from the interior of the vehicle, then as a rule a separate air conditioning system with a blower and an evaporator in each case is used in order to set the temperature and the volume flow of the air flow for cooling the battery in a targeted manner and independently of one another.In particular in the case of high-class vehicles, there are often a plurality of air conditioners. For example, an air conditioner placed in the front vehicle area serves to cool the front area, while a second air conditioner formed in the rear area of the vehicle performs air conditioning of the rear area. The use of more than two air conditioning systems, for example for the targeted cooling of all vehicle seats present, is also conceivable.It is therefore possible to use, for example, one of the plurality of air conditioners, for example, the air conditioner in the rear region, for cooling the battery of the hybrid or electric vehicle.DE 10 2005 049 200 A1 discloses a battery cooling apparatus for cooling a battery for vehicle use, which is applied to a vehicle on which an air conditioner is mounted with a cooling device for cooling air flowing through the cooling device, a battery cooling fan for blowing intake air to the battery, and a mode switching device capable of switching one of an inside air mode in which the intake air is the air inside a vehicle cabin, an outside air mode in which the intake air is the air outside a vehicle cabin, and a cooling air mode in which the intake air is the air cooled by the cooling device of the air conditioner. The disclosed invention comprises two fans, on the one hand a battery cooling fan which serves for blowing intake air to the battery and, on the other hand, an air conditioning fan which draws in air from an interior of the vehicle and blows it out again into the interior of the vehicle via an evaporator or a cooling device. The targeted setting of the temperature and of the volume flow of the air flow for cooling the battery is effected in this case via the setting of a fan intensity of the battery cooling fan, a setting of the mode switches which control the mixing ratio between internal air, external air and cooling air, and a control of the cooling effect of the evaporator. Furthermore, it is disclosed that a heating device is arranged in the air conditioning system next to the evaporator for cooling. A disadvantage of the disclosed invention arises from the use of two fans, which require a large installation space of the battery cooling device.From the post-published DE 10 2008 045 019 A1, a generic device for cooling at least one battery and at least part of an interior space in a vehicle is known.US 2003 / 0 080 714 A1 discloses a device for cooling at least one battery and at least part of an interior space in a vehicle, comprising an air conditioning system having a first air duct, wherein a first air stream is blown into the first air duct, at least part of the first air stream is cooled by a cooling device and the first air stream is blown out into the interior space. In this case, a volume flow of the first air flow is controlled via a first throttle flap. The device further comprises at least one second air duct, wherein a second air flow is blown into the second air duct and blown out at least to a battery, wherein a volume flow of the second air flow is controlled via a second throttle flap, wherein the first air flow is sucked by a central blower and blown into the first air duct, and the second air flow is sucked by the central blower and blown into the second air duct.The technical problem therefore arises of creating a device and a method for cooling at least one battery and at least part of an interior in a vehicle, which device and method allow a targeted setting of a temperature and of a volume flow of an air flow for cooling the battery and of an air flow for cooling the interior with a small installation space requirement.The solution of the technical problem results from the device with the features of claim 1 and the method with the features of claim 8.In this case, an apparatus for cooling at least one battery and at least part of an interior space in a vehicle comprises a first air conditioning system having a first air duct and a first cooling system, wherein a first air stream is blown into the first air duct, at least part of the first air stream is cooled by a first cooling system and the first air stream is blown out into the interior space, wherein a volume flow of the first air stream is controlled via a first throttle flap, and at least one second air duct, wherein a second air stream is blown into the second air duct and blown out to at least one battery, wherein a volume flow of the second air stream is controlled via a second throttle flap, wherein at least one second air conditioning system, which comprises at least part of the second air duct, comprises, at least a portion of the second air flow is cooled by a second cooling means, the first air flow being drawn by a central fan and blown into the first air duct, and the second air flow being drawn by the central fan and blown into the second air duct. This advantageously makes it possible to allow the cooling of the battery and the cooling of the at least part of the interior of the vehicle with only one central blower. This reduces the installation space requirements of the device for cooling. It is conceivable that the first and the second air conditioning systems are separate units of an air conditioning unit or are designed as two individual air conditioning units. The disclosed invention thus makes it possible to use a conventional two-zone air conditioner which divides the air drawn in by the central blower into the first and second air streams which are separately cooled by the first and second cooling means, respectively. The first throttle valve serves here for controlling the volume flow of the first air flow and thus for controlling the cooling of the interior. The second throttle valve is used analogously to control the volume flow of the second air flow and thus to control the cooling of the battery. The control of a cooling effect of the first or second cooling device serves for setting the temperature of the first or second air flow and thus also for controlling the cooling of the interior or of the battery. The control of a blower intensity of the central blower also serves to control the cooling of the interior and of the battery. Thus, the temperature and the volume flow of the air flow can be adjusted in a targeted manner and independently of one another on both air paths.Furthermore, at least a part of the second air duct comprises at least one second cooling duct and at least one second heating duct, wherein the second air stream is divided into at least one second cooling air stream which flows through the second cooling duct and into at least one second heating air stream which flows through the second heating duct, and the central blower blows the second cooling air stream into the second cooling duct and the second heating air stream into the second heating duct or the second air stream is divided from an active or passive second air dividing device into the second cooling air stream and the second heating air stream. This advantageously makes it possible to cool only a part of the second air flow, namely the second cooling air flow, by means of the second cooling device. The division of the second air flow into the second cooling air flow and into the second heating air flow can be effected via a second cooling duct which is structurally separate from a second heating duct and into which the central fan blows air. Optionally, it is also conceivable that a second air dividing device, which is arranged for example in the second air duct, divides the second air flow into the second cooling air flow and the second heating air flow. The air dividing device can be designed to be active or passive.An active air dividing device divides the second air stream into the second cooling air stream and the second heating air stream while consuming energy, wherein a passive air dividing device enables division without further energy consumption. In the case of an active air dividing device, the division of the second air stream into the second cooling air stream and the second heating air stream can be actively influenced, for example by one or more controllable valves or by one or more actively adjustable flaps. This also makes it possible to set a volume flow ratio between the cooling air flow and the heating air flow, resulting in a further degree of freedom in the control of the cooling of the battery. It is likewise conceivable to design the air dividing device passively. This is effected, for example, via a pipe branch arranged fixedly in the second air duct.In this case, a second heating device is arranged in the second heating channel, which heating device heats the second heating air stream. This results in a further degree of freedom in the control of the temperature of the second air flow and thus in the control of the cooling of the battery.In one embodiment, the central blower draws the first and second air streams from the interior of the vehicle and / or from the outside air. This advantageously results in the temperature of the air prevailing in the interior or in the outside air being able to be used for cooling the battery.In a preferred embodiment, the second cooling duct and the second heating duct are combined to form the second air duct via an active or passive second air mixing device. This advantageously results in no further throttle valves being provided than the second throttle valve, for example for controlling the second cooling air flow and the second heating air flow. Analogously to the active or passive air dividing device, an active air mixing device carries out a combination of the second cooling air stream and the second heating air stream to form the second air stream with consumption of energy. It is conceivable that the second air mixing device, when embodied actively, comprises an actively controllable flap, which can also be referred to as a temperature flap, or one or more actively controllable valves.In a further embodiment, in the flow direction of the second air flow, the second cooling device is arranged upstream of the second air dividing device, the second air dividing device upstream of the second air mixing device and the second air mixing device upstream of the second throttle flap. Preferably, the second air-dividing device is designed as a passive air-dividing device and the second air mixing device as an active second air mixing device, wherein it is also conceivable that the second air-dividing device is designed as an active air-dividing device and the second air mixing device is designed as a passive air mixing device or both, the second air-dividing device and the second air mixing device, are each designed as an active or passive device.In an alternative embodiment, the central blower blows the second cooling air stream into the second cooling duct and the second heating air stream into the second heating duct, and the second air mixing device is arranged upstream of the second throttle flap in the flow direction of the second air stream. Preferably, the second air mixing device is designed as an active air mixing device.In a further embodiment, the second cooling device is arranged in the second air duct or in the second cooling duct.In a further embodiment, at least one temperature sensor and / or a volume flow sensor is arranged in the second air duct and / or in the second heating duct and / or in the second cooling duct. The use of temperature and / or volume flow sensors or the evaluation of the current temperature or the current volume flow advantageously enables a regulation of the active elements of the second air conditioning system, in particular a regulation of the blower intensity of the central blower, a regulation of the positions of the second throttle flap and a regulation of the cooling effect of the second cooling system. In the case of an active second air-dividing device or active second air mixing device, the active second air-dividing device or the active second air mixing device can likewise be controlled on the basis of the temperature data of the temperature sensor or the volume flow data of the volume flow sensor.In a method for cooling at least one battery and at least part of an interior space in a vehicle, a first air flow is blown into an air duct of a first air conditioning system, wherein at least part of the first air flow is cooled by a first cooling device and the first air flow is blown out into the interior space of the vehicle, wherein a volume flow of the first air flow is controlled via a first throttle valve, and a second air flow is blown into a second air duct and blown out to at least one battery, wherein a volume flow of the second air flow is controlled via a second throttle valve, wherein a second cooling device of a second air conditioning system, which comprises at least part of the second air duct, cools at least part of the second air flow, wherein the first air flow is sucked by a central blower and blown into the first air duct and the second air flow is sucked by the central blower and blown into the second air duct.In this case, the second air stream is at least partially divided by an active or passive second air dividing device into a second cooling air stream and a second heating air stream, wherein a desired temperature and / or a desired volume stream of the second air stream is set via an active control of the second air dividing device or via a design of the second air dividing device. This advantageously results in that, in the case of an active second air dividing device, a further degree of freedom is available for controlling the temperatures and / or the volume flow of the second air flow.Furthermore, the heating air stream is heated via a second heating device, wherein a desired temperature of the second air stream is adjusted via a control of a heating effect of the second heating device. This advantageously results in the heating effect of the second heating device being able to be used as a further degree of freedom for setting the desired temperature of the second air flow. As a result, it is possible in a particularly advantageous manner for a battery to be not only cooled but also heated, for example when the desired operating temperature has not yet been reached in cold ambient conditions. However, there should then be effective protection against condensate formation on or around the battery.In a further embodiment, the second air flow is at least partially divided into a second cooling air flow and a second heating air flow, and a second air mixing device combines the second cooling air flow and the second heating air flow to form the second air flow, wherein a desired temperature and / or a desired volume flow of the second air flow is set via an active control of the second air mixing device or via a design of the second air mixing device. Analogous to the integration of an active second air part device, a second active air mixing device results in a further degree of freedom for controlling a desired temperature and / or a desired volume flow of the second air flow.In a preferred embodiment, a desired temperature and / or a desired volume flow of the second air flow is set by controlling a blower intensity of the central blower and / or a cooling effect of the second cooling device and / or a position of the second throttle flap. This advantageously results in the temperature and / or the volume flow of the first and of the second air flow being able to be adjusted independently of one another in a targeted manner. There are several degrees of freedom for setting the temperature and / or the volume flow of the second air flow. First, control of the blower intensity of the central blower, second, control of the cooling effect of the second cooling device, third, control of the position of the second throttle valve. Preferably, all degrees of freedom are used to set a desired temperature and / or a desired volume flow of the second air flow and thus to achieve a predetermined cooling effect of the battery. It is conceivable that a predetermined cooling effect is assigned a predetermined blower intensity, a predetermined cooling effect and a predetermined position of the second throttle flap, wherein such an assignment can take place, for example, in the form of a table. It is likewise conceivable for the degrees of freedom, i.e. the blower intensity, the cooling effect and the position of the second throttle flap, to be controlled by including temperature and / or volume flow sensors which measure the temperature or the volume flow of the second air flow. In this case, the data of the temperature sensor and / or of the volume flow sensor are preferably transmitted to a central control unit, which is preferably integrated into a control unit of the second air conditioning system. The control unit determines a desired volume flow and / or a desired temperature of the second air flow on the basis of a desired cooling effect of the battery and determines a control deviation therefrom as a difference between the desired temperature and the measured temperature and / or the desired volume flow and the measured volume flow. From the control deviation, a control signal for, for example, the central blower, the second cooling device and the second throttle valve is generated with the aid of a controller, which is designed, for example, as a PID controller.The invention is explained in more detail with reference to an exemplary embodiment. The figures show: FIG. 1 is a schematic block diagram of a conventional full two-zone air conditioner, FIG. 2 is a schematic block diagram of a simplified two-zone air conditioning unit; and FIG. 3 shows a schematic block diagram of a modified two-zone air conditioning device.FIG. 1 shows a two-zone air conditioning unit 1, which serves for cooling a battery 2 and an interior 3 of a vehicle, not shown. It is of course also conceivable for the air conditioning unit 1 to cool a plurality of batteries and / or only a part of the interior of the vehicle, not shown, e.g. a rear region. For cooling the battery 2 and the interior space 3, a central blower 4 draws in a central air flow from the interior space 3 and blows the central air flow as a first air flow into an upper part 51' of a first air duct 51 and as a second air flow into an upper part 52' of a second air duct 52. Here, a blower intensity of the central blower 4 may be adjusted or the central blower 4 may be positioned such that a predetermined air flow volume ratio between the first and second air flows is achieved. Alternatively or additionally, it is conceivable that, for example, the inlet openings of the first air duct 51 and the second air duct 52 are arranged or formed in such a way that a predetermined air flow volume ratio between the first and the second air flow is achieved. In the upper part 51' of the first air duct 51, a first cooling device 61, which is designed, for example, as an evaporator, is arranged. The first cooling device 61 serves for cooling the first air flow. A cooling effect of the first cooling device 61 is preferably controllable, but alternatively a predetermined, fixedly set cooling effect of the first cooling device 61 is also conceivable.Downstream of the first cooling device 61 in the flow direction of the first air flow, a first air dividing device 71 is arranged. The first air dividing device 71 divides the first air flow into a first cooling air flow and a first heating air flow. For this purpose, the first air duct 51 comprises at least partially a first cooling air duct 81, in which the first cooling air stream flows, and a first heating air duct 91, in which the first heating air stream flows. The first air dividing device 71 connects the upper part 51' of the first air duct 51 to the first cooling air duct 81 on the one hand and the upper part 51' of the first air duct 51 to the first heating air duct 91 on the other hand.In FIG. 1, the first air dividing device 71 is shown as a passive air dividing device, wherein a passive air dividing device does not require energy for dividing an air flow. Thus, for example, it is conceivable that the upper part 51' of the first air duct 51 and the first cooling air duct 81 and the first heating air duct 91 are formed as a tube and the first air dividing device 71 is formed as a first tube branch, for example. The first branch of the pipe has a first opening for connecting the first branch of the pipe to the upper part 51' of the first air duct 51, a second opening for connecting the first branch of the pipe to the first cooling air duct 81, and a third opening for connecting the first branch of the pipe to the first heating air duct 91. The first branch of the pipe is preferably Y-shaped. However, it is also possible to form the first branch of the pipe in a T-shaped or other manner. Furthermore, it is possible for the second and the third opening of the first pipe branch to be formed with different sizes, in order to achieve a predetermined air flow volume ratio between the first cooling air flow and the first heating air flow, for example.A first heating device 101 is arranged in the first heating air channel, which heating device heats the first heating air flow. A heating effect of the first heating device 101 is preferably controllable, but alternatively a predetermined, permanently set heating effect of the first heating device is also conceivable. The first heating device 101 can be designed, for example, as a heating heat exchanger or as a heating element.Downstream of the first heating device 101 in the flow direction of the first air flow or of the first heating air flow, a first air mixing device 111 is arranged, which mixes the first cooling air flow with the first heating air flow.Analogously to the first air dividing device 71, it is conceivable that the first air mixing device 111 is designed as a second pipe branch, wherein a first opening serves for connecting the second pipe branch to the first cooling air duct 81, a second opening serves for connecting the second pipe branch to the first heating air duct 91, and a third opening serves for connecting the second pipe branch to a lower part 51'' of the first air duct 51. The second branch of the pipe is preferably Y-shaped. However, it is also possible to form the second branch of the pipe in a T-shaped or other manner.In FIG. 1, the first air mixing device 111 is shown as an active air mixing device. In this case, for example, the second opening of the first air mixing device 111 is closed by an actively controllable flap, wherein the actively controllable flap allows control of the degree of opening of the second opening of the first air mixing device 111. It is thus possible to control the volume flow of the first heating air flow. Alternatively, it is also conceivable that only the first opening of the first air mixing device 111 is closed by an actively controllable flap or that the first and the second opening of the first air mixing device are each closed by an actively controllable flap or that the first and the second opening are closed by a common, actively controllable flap.It is of course also conceivable to configure the first air mixing device 111, analogously to the first air dividing device 71, as a passive air mixing device 111. It is likewise conceivable to configure the first air dividing device 71, analogously to the first air mixing device 111, as an active air dividing device.Downstream of the first air mixing device 111 in the flow direction of the first air flow, a first throttle valve 121 is arranged, which controls the volumetric flow rate of the first air flow via an opening degree of the first throttle valve 121.Downstream of the first throttle valve 121 in the flow direction of the first air flow, a first temperature sensor 131 is arranged, which measures the temperature of the first air flow.Downstream of the first temperature sensor 131, the first air stream is blown out again into the interior 3 via one or more openings.Here, the first air duct 51, in this case the upper part 51' and the lower part 51'' of the first air duct 51, the first cooling device 61, the first air dividing device 71, the first cooling duct 81, the first heating duct 91, the first heating device 101, the first air mixing device 111, the first throttle valve 121 and the first temperature sensor 131 are also referred to as components of a first climate control position.Furthermore, the first air conditioning unit 1 comprises a second air conditioning system, which is constructed analogously to the first air conditioning system. The second air conditioning system comprises as components a second air duct 52 with an upper part 52' and a lower part 52", a second cooling device 62, a second air dividing device 72, a second cooling duct 82, a second heating duct 92, a second heating device 102, a second air mixing device 112, a second throttle flap 122, and a second temperature sensor 132.The structure of the second air conditioning system and the configuration of the individual components of the second air conditioning system are analogous to the structure of the first air conditioning system and the configuration of the components of the first air conditioning system. In this respect, the designs for the first air duct 51 can also be transferred to the second air duct 52, the designs for the first cooling device 61 can also be transferred to the second cooling device 62, the designs for the first air dividing device 71 can also be transferred to the second air dividing device 72, the designs for the first cooling duct 81 can also be transferred to the second cooling duct 82, the designs for the first heating duct 91 can also be transferred to the second heating duct 92, the designs for the first air mixing device 111 can also be transferred to the second air mixing device 112, the designs for the first throttle flap 121 can also be transferred to the second throttle flap 122, and the designs for the first temperature sensor 131 can also be transferred to the second temperature sensor 132.Downstream of the second temperature sensor 131, the second air stream is blown out via one or more openings to the battery 2 and / or to a battery housing.With the first air conditioning unit 1 shown, it is now possible, by controlling the controllable components of the first and the second air conditioning system and by controlling a blower intensity of the central blower 4, to make possible firstly a specific setting of the temperature of the first air flow to a first predetermined temperature and / or a specific setting of the volume flow of the first air flow to a first predetermined volume flow and secondly a specific setting of the temperature of the second air flow to a second predetermined temperature and / or a specific setting of the volume flow of the second air flow to a second predetermined volume flow, wherein the setting of the temperature of the first and of the second air flow and / or the setting of the volume flow of the first and of the second air flow can be carried out independently of one another. It is thus possible to achieve a targeted cooling or heating effect for the interior 3 and, independently thereof, a targeted cooling or heating effect for the battery 3.Controllable components of the first air conditioning system include the first cooling device 61, the first heating device 101, the first throttle valve 121, the first air dividing device 71 if it is designed to be actively controllable, and the first air mixing device 111 if it is designed to be actively controllable.The control of the volume flow of the first air flow is preferably obtained from a control of the blower intensity of the central blower 4, the control of the position of the first throttle flap 121 and the control of the first air dividing device 71 if it is designed to be actively controllable and the control of the first air mixing device 111 if it is designed to be actively controllable.The temperature of the first air stream is preferably controlled by means of controlling the cooling effect of the first cooling device 61 and controlling the heating effect of the first heating device 101 and controlling the first air dividing device 71 if it is designed to be actively controllable and controlling the first air mixing device 111 if it is designed to be actively controllable.Controllable components of the second air conditioning system include the second cooling device 62, the second heating device 102, the second throttle flap 122, the second air dividing device 72, if it is designed to be actively controllable, and the second air mixing device 112, if it is designed to be actively controllable.The control of the volume flow of the second air flow is preferably obtained from a control of the blower intensity of the central blower 4, the control of the position of the second throttle flap 122 and the control of the second air dividing device 72 if this is designed to be actively controllable, and the control of the second air mixing device 112 if this is designed to be actively controllable.The temperature of the second air stream is preferably controlled by means of controlling the cooling effect of the second cooling device 62 and controlling the heating effect of the second heating device 102 and controlling the second air dividing device 72 if it is designed to be actively controllable and controlling the second air mixing device 112 if it is designed to be actively controllable.If, for example, the second predetermined volume flow is greater than the first predetermined volume flow, the second throttle valve is fully opened and the blower intensity of the central blower 4 is adjusted in accordance with the second predetermined volume flow. The first predetermined volume flow is then adjusted by throttling the first throttle valve.The controllable components of the second air conditioning system are preferably controlled separately from the controllable components of the first air conditioning system.However, it is also conceivable to perform common control of individual or all of the constituent elements of the first and second air conditioners, for example, common control of the cooling effect of the first cooling device 61 and the second cooling device 62.It is likewise conceivable, in contrast to the illustration in FIG. 1, for one or more components of the first and the second air conditioning system to be formed as a common component. Thus, for example, it is conceivable to form a common cooling device, wherein the common cooling device further cools the first and the second air stream.The air conditioning unit 1 shown in FIG. 1 also makes it possible to supply the battery 2 with warm air. It is thus possible, for example, to heat them, for example, if a desired operating temperature of the battery 2 has not yet been reached. However, this also requires effective protection against condensate formation.If the requirement for the air conditioning unit is limited to an exclusive cooling of the battery 2, a simplified construction of the second air conditioning system can be effected. FIG. 2 shows a simplified air conditioning unit 1'. Here, the first air conditioner is constructed like the first air conditioner shown in FIG. 1. The second air conditioning system comprises only the components of the second cooling device 62, second throttle valve 122, and second temperature sensor 132. In this case, in the flow direction of the second air flow, the second temperature sensor 132 is arranged behind the second throttle flap 122, and the second throttle flap is arranged behind the second cooling device 62. The second air duct 52 is not divided into a second cooling air duct 82 and a second heating air duct 92.If the air conditioning device 1' shown in FIG. 2 does not allow sufficient and / or homogeneous cooling of the battery or of a plurality of battery cells due to an excessively low maximum air volume flow of the second air flow, a modified air conditioning device 1" shown in FIG. 3 can be used. At this time, the central air flow is sucked by the central blower 4 and simultaneously blown into the second cooling passage 82 and the second heating passage 92. Thus, there is no upper part 52' of the second air duct compared to the air conditioner 1 shown in FIG. 1. Furthermore, the second cooling device 62 is arranged in the second cooling channel 82. Furthermore, no second heating device 102 is arranged in the second heating channel 92. The air mixing device 112 then mixes the second cooling air stream and the second heating air stream into the second air stream. The air flow bypass of the second cooling device 62 achieved by the second heating channel 92 allows the same cooling effect for the battery 2 in comparison with the air conditioning unit 1' shown in FIG. 2, wherein the second air flow does have a higher temperature, but also a higher volume flow. In this case, the energy consumption of the second air conditioning system or of the modified air conditioning system 1" does not increase, or only slightly increases, in comparison with the air conditioning system 1' shown in FIG. 2.

Claims

Device for cooling at least one battery (2) and at least part of an interior space (3) in a vehicle, comprising a first air conditioning system having a first air duct (51), wherein a first air stream is blown into the first air duct (51), at least part of the first air stream is cooled by a first cooling device (61) and the first air stream is blown out into the interior space (3), wherein a volume flow of the first air stream is controlled via a first throttle flap (121), and at least one second air duct (52), wherein a second air stream is blown into the second air duct (52) and blown out to at least one battery (2), wherein a volume flow of the second air stream is controlled via a second throttle flap (122), wherein at least one second air conditioning system, which comprises at least part of the second air duct (52), cools at least part of the second air stream by a second cooling device (62), wherein the first air flow is drawn in by a central blower (4) and blown into the first air duct (51) and the second air flow is drawn in by the central blower (4) and blown into the second air duct (52), characterized in that at least a part of the second air duct (52) comprises at least one second cooling duct (82) and at least one second heating duct (92), wherein the second air flow is introduced into at least one second cooling air flow which flows through the second cooling duct (82) and into at least one second heating air flow which flows through the second heating duct (92), the central blower (4) blows the second cooling air stream into the second cooling duct (82) and the second heating air stream into the second heating duct (92) or the second air stream is divided from an active or passive second air dividing device (72) into the second cooling air stream and the second heating air stream, wherein a second heating device (102) which heats the second heating air stream is arranged in the second heating duct (92).Device according to claim 1, characterised in that the central fan (4) draws the first and second air currents from the interior (3) of the vehicle and / or from the outside air.Device according to claim 1 or 2, characterised in that the second cooling channel (82) and the second heating channel (92) are combined to form the second air channel (52) via an active or passive second air mixing device (112).Device according to Claim 3, characterized in that, in the direction of flow of the second air stream, the second cooling device (62) is arranged upstream of the second air dividing device (72), the second air dividing device (72) is arranged upstream of the second air mixing device (112) and the second air mixing device (112) is arranged upstream of the second throttle flap (122).Device according to Claim 3, characterized in that the central fan (4) blows the second cooling air stream into the second cooling duct (82) and the second heating air stream into the second heating duct (92), and the second air mixing device (112) is arranged upstream of the second throttle flap (122) in the direction of flow of the second air stream.Device according to one of the preceding claims, characterized in that the second cooling device (62) is arranged in the second air duct (52) or in the second cooling duct (82).Device according to one of the preceding claims, characterized in that at least one temperature sensor (132) and / or a volume flow sensor is arranged in the second air duct (52) and / or in the second heating duct (92) and / or in the second cooling duct (82).Method for cooling at least one battery (2) and at least part of an interior space (3) in a vehicle, wherein a first air flow is blown into a first air duct (51) of a first air conditioning system, at least part of the first air flow is cooled by a first cooling device (61) and the first air flow is blown out into the interior space (3) of the vehicle, wherein a volume flow of the first air flow is controlled via a first throttle flap (121), and a second air flow is blown into a second air duct (52) and blown out to at least one battery (2), wherein a volume flow of the second air flow is controlled via a second throttle flap (122), wherein a second cooling device (62) of a second air conditioning system, which comprises at least part of the second air duct (52), cools at least part of the second air flow, wherein the first air stream is drawn in by a central blower (4) and blown into the first air duct (51) and the second air stream is drawn in by the central blower (4) and blown into the second air duct (52), wherein the second air stream is at least partially divided into a second cooling air stream and a second heating air stream and a second air mixing device (112) combines the second cooling air stream and the second heating air stream into the second air stream, wherein a desired temperature and / or a desired volume stream of the second air stream is set via an active control of the second air mixing device (112) or via a design of the second air mixing device (112), wherein the heating air stream is heated via a second heating device (102), wherein a desired temperature of the second air stream is set via a control of a heating effect of the second heating device (102).Method according to Claim 8, characterized in that a desired temperature and / or a desired volume flow of the second air flow is set by controlling a fan intensity of the central fan (4) and / or a cooling effect of the second cooling device (62) and / or a position of the second throttle flap (122).Method according to either of Claims 8 and 9, characterized in that the second air flow is at least partially divided by an active or passive second air part device (72) into a second cooling air flow and a second heating air flow, wherein a desired temperature and / or a desired volume flow of the second air flow is set via an active control of the second air part device (72) or via a design of the second air part device (72).

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