Temperature control device for controlling the temperature of an electrical energy storage device for a motor vehicle and motor vehicle

Abstract

A temperature control device (1) for controlling the temperature of an electrical energy storage device (2) for a motor vehicle, comprising a liquid temperature control fluid, a supply line element (5) through which the temperature control fluid can flow for controlling the temperature of the energy storage device (2), as the first line element, via which the temperature control fluid flowing through the supply line element (5) can be introduced into the energy storage device (2), and a return line element (10) through which the temperature control fluid can flow, as the second line element, via which the temperature control fluid flowing through the energy storage device (2) can be discharged from the energy storage device (2), wherein the energy storage device (2) has a plurality of storage cells for storing the electrical energy and a storage housing (3) in which the storage cells are arranged, characterized in thatthat the line elements formed separately from the storage housing (3) and extending outside the storage housing (3) are arranged in a housing (16) common to the line elements and arranged outside the storage housing (3), in which housing there is also arranged a bypass line element (17) which is fluidically connected or connectable to the line elements and extends outside the storage housing (3), via which bypass line element the energy storage device (2) is to be bypassed by the temperature control fluid, wherein the housing (16), the bypass line element (17), the feed line element (5) and the return line element (10) form a structural unit (18) which is assembled and mounted independently of the energy storage device (2) and which can be handled as a whole in its assembled and mounted state.

Description

[0001] The invention relates to a temperature control device for controlling the temperature of an electrical energy storage device for a motor vehicle according to the preamble of patent claim 1. Furthermore, the invention relates to a motor vehicle, in particular a motor vehicle.

[0002] DE 10 2015 220 623 A1 discloses a heating system for an electric or hybrid vehicle, comprising a refrigeration circuit, a heating heat exchanger arranged in a heating circuit, and a high-voltage storage device. Furthermore, DE 10 2012 024 080 A1 discloses a vehicle with at least one electric motor. Furthermore, DE 10 2016 200 362 A1 discloses a heating system for an electric or hybrid vehicle. Furthermore, KR 10 2011 0 004 206 A discloses a vehicle battery cooling device. Furthermore, DE 10 2017 123 274 A1 discloses an energy system for operating a household appliance.

[0003] The object of the present invention is to provide a temperature control device for controlling the temperature of an electrical energy storage device of a motor vehicle and a motor vehicle, so that a particularly high level of safety of the energy storage device can be realized in a particularly simple manner.

[0004] This object is achieved according to the invention by a temperature control device having the features of patent claim 1 and by a motor vehicle having the features of patent claim 10. Advantageous embodiments of the invention are the subject of the dependent claims.

[0005] A first aspect of the invention relates to a temperature control device for controlling the temperature, i.e., for cooling and / or heating, of an electrical energy storage device for a motor vehicle. This means that the motor vehicle, preferably designed as a motor vehicle, in particular as a passenger car, in its fully manufactured state has the electrical energy storage device by means of which electrical energy can be stored. The electrical energy storage device is preferably a high-voltage component whose electrical voltage, in particular electrical operating and nominal voltage, is preferably greater than 50 volts, in particular greater than 60 volts, and very preferably amounts to several hundred volts. The energy storage device is thus also referred to as a high-voltage storage device (HVS). In particular, the energy storage device can be a battery, in particular a high-voltage battery (HV battery).The motor vehicle can have at least one electric machine which can be operated, for example, using the electrical energy stored in the energy storage device, by means of which the motor vehicle can be driven, in particular purely electrically. The motor vehicle can therefore be designed, for example, as a hybrid or electric vehicle, in particular as a battery-electric vehicle. In this case, the electric machine is preferably also a high-voltage component whose electrical voltage, in particular electrical operating and nominal voltage, is preferably greater than 50 volts, in particular greater than 60 volts, and very preferably amounts to several hundred volts. This makes it possible to achieve particularly high electrical outputs for driving the motor vehicle, in particular purely electrically. In particular, the energy storage device is designed to store the electrical energy electrochemically.For this purpose, the energy storage device comprises a plurality of, in particular, individual storage cells, by means of which the electrical energy is stored. The individual cells are electrically connected to one another. Furthermore, the energy storage device comprises a storage housing in which the storage cells are arranged. Thus, it is conceivable that the storage housing defines a receiving space, also referred to as the interior, in which the storage cells can be arranged.

[0006] The temperature control device comprises a liquid temperature control fluid and a flow line element through which the liquid temperature control fluid can flow for temperature control, i.e., for cooling and / or heating the energy storage device, which is a first line element of the temperature control device and is referred to as the first line element. The temperature control fluid preferably comprises at least water. Temperature control fluid can be introduced into the energy storage device via the first line element (flow line element). The feature that the temperature control fluid can be introduced into the energy storage device via the flow line element is to be understood in particular that the temperature control fluid flowing through the flow line element can be guided to the energy storage device, in particular to the storage housing, by means of the flow line element and subsequently introduced into the energy storage device, in particular into the storage housing.The supply line element is provided to extend outside the energy storage device, i.e., outside the storage housing and thus outside the receiving space. Thus, the temperature control fluid can be supplied to the energy storage device via the supply line element from outside the energy storage device, i.e., from outside the storage housing. Particularly when the temperature control device or the temperature control fluid is designed or used to cool the energy storage device, the temperature control fluid is a cooling fluid or the temperature control fluid is used as a cooling fluid, whereby the cooling fluid is also referred to as a coolant.

[0007] The temperature control device also has a return line element, which is a second line element of the temperature control device or is referred to as a second line element. Thus, the temperature control fluid, particularly after it has subsequently flowed through the energy storage device, in particular the storage housing, can be discharged from the energy storage device, in particular from the storage housing, i.e., can be guided away from the energy storage device or out of the energy storage device. Provision is made for the return line element to run outside the energy storage device and thus outside the storage housing and outside the receiving space. For example, the line elements are solid bodies, or the line elements are channels that are delimited, in particular directly, by a respective solid body, wherein the respective solid bodies delimiting the respective line elements can be formed separately from one another or integrally with one another.In particular, it is conceivable that the solid bodies are connected to one another. For example, the conduit elements and the energy storage device, in particular the storage housing, are arranged in a temperature control circuit through which the temperature control fluid can flow, which is also simply referred to as a temperature control circuit and through which the temperature control fluid can flow.On its way through the temperature control circuit, the temperature control fluid, with respect to the line elements and the energy storage device, can first flow through the supply line element, then through the energy storage device, in particular through the storage housing, and then through the return line element, so that in the flow direction of the temperature control fluid flowing through the temperature control circuit, the supply line element is preferably arranged upstream of the energy storage device, in particular the storage housing, wherein the energy storage device, in particular the storage housing, is arranged upstream of the return line element, so that the return line element is arranged downstream of the energy storage device, in particular the storage housing, and downstream of the supply line element. Accordingly, the energy storage device is arranged upstream of the return line element and downstream of the supply line element.The storage housing is formed separately from the respective line element or from the respective solid body, wherein it is particularly conceivable that the respective solid body or the respective line element is connected to the energy store, in particular to the storage housing, and is thus held in an energy store, in particular a storage housing.

[0008] For example, in order to heat the energy storage device, in particular the storage cells, using the temperature control fluid, heat can be transferred from the temperature control fluid flowing through the energy storage device to the energy storage device, in particular the storage cells, in particular when the temperature control fluid has a higher temperature than the energy storage device, in particular the storage cells. Alternatively or additionally, it is conceivable for the energy storage device, in particular the storage cells, to be cooled using the temperature control fluid. For this purpose, heat is transferred from the energy storage device, in particular from the storage cells, to the temperature control fluid flowing through the energy storage device, in particular when the temperature control fluid has a lower temperature than the energy storage device, in particular the storage cells.

[0009] In order to be able to achieve a particularly high level of safety for the energy storage device in a particularly simple and therefore cost-effective manner, the invention provides for the line elements to be arranged in a housing common to the line elements, which is arranged outside the storage housing and is also referred to as the line element housing. When reference is made to the housing below, this means the line element housing unless otherwise stated. The housing is or comprises, for example, the aforementioned solid bodies. It is thus conceivable, for example, for the housing to delimit the line elements, in particular directly in each case. For example, the housing is designed in one piece, or the housing can be designed in multiple parts and thus have at least two housing parts that are designed separately from one another and connected to one another.In particular, the conduit elements are preferably elongated, preferably essentially incorporeal cavities arranged and extending in the housing, through which the temperature control fluid can flow. For example, the cavities are delimited, in particular directly, by the housing. Furthermore, it is conceivable that the cavities are delimited, in particular directly, by at least one or more additional components formed separately from the housing and arranged in the housing and designed as solid bodies.

[0010] For example, the line elements extending outside the storage housing are fluidically connected to at least one flow channel extending within the energy storage device, in particular within the storage housing, and through which the temperature control fluid can flow, so that the temperature control fluid flowing through the supply line element can flow out of the supply line element, into the flow channel, and then through the flow channel and thus through the energy storage device, in particular the storage housing. The temperature control fluid flowing through the flow channel can then flow out of the flow channel and thus out of the energy storage device, in particular out of the storage housing, into the return line element, and subsequently through the return line element, whereby the temperature control fluid is guided from the energy storage device via the return line element.

[0011] Furthermore, the invention provides for a bypass line element that is fluidically connected or connectable to the line elements to be arranged in the housing. The supply line element is also referred to as the supply line or supply line, and the return line element is also referred to as the return line or return. The bypass line element is also referred to as a bypass line, bypass, or bypass channel. The energy storage device can be bypassed by the temperature control fluid flowing through the supply line element, in particular, via the bypass line element.This means that the temperature control fluid flowing through the bypass line element bypasses the energy storage device, i.e., does not flow through the energy storage device, in particular, does not flow into the energy storage device. Instead, the temperature control fluid flowing through the bypass line element can flow directly from the supply line element into the return line element, i.e., without flowing into or through the energy storage device. The bypass line element is thus, so to speak, a short circuit between the line elements that bypasses the energy storage device, whereby the short circuit is understood to mean a short-circuit flow of the temperature control fluid directly between the line elements that bypasses the energy storage device, i.e., does not flow into the energy storage device.In particular, the bypass line element is designed to branch off the tempering fluid flowing through the feed line element, i.e., at least a portion of the tempering fluid flowing through the feed line element, in particular completely, from the feed line element and introduce it into the bypass line element, which is then flowed through by the tempering fluid from the feed line element. The tempering fluid flowing through the bypass line element is introduced by means of the bypass line element from the feed line element to and into the return line element, without the tempering fluid flowing through the bypass line element flowing into the energy storage device and flowing through the energy storage device.In other words, the bypass line element can prevent the temperature control fluid that initially flows through the supply line element, i.e., initially through at least a portion of the supply line element, from flowing into the energy storage device via the supply line element. This can prevent an excessive amount of temperature control fluid from flowing into the energy storage device in the event of a fault, which could result from an accident, for example. In particular, this can prevent the energy storage device from filling up with temperature control fluid.

[0012] Since the line elements and the bypass line element are arranged in the housing, the line elements, the bypass line element, and the housing form a combined component or are components of a combined component that includes at least the line elements, the bypass line element, and the housing. The combined component is understood to be a structural unit that is considered on its own and thus, in particular, manufactured and, in particular, completely assembled independently of the energy storage device, which can be handled as a whole and, in particular, mounted on the energy storage device and disassembled from the energy storage device, in particular from the storage housing.The invention is based in particular on the following findings and considerations: For example, in the event of a fault in the temperature control circuit, which is designed or functions, for example, as a cooling circuit, it is desirable for the temperature control fluid or a temperature control fluid flow formed by the temperature control fluid to be interrupted, i.e., for example, at least to be prevented from flowing from outside the energy storage device into the energy storage device. This can ensure a particularly safe condition for occupants of the motor vehicle as well as for persons in the vicinity of the motor vehicle.In particular, it is desirable to prevent the energy storage device, in particular the storage housing, from filling with an excessive amount of temperature control fluid, especially if there is a mechanical break in internal pipework, i.e., channels running through the energy storage device and through which the temperature control fluid can flow, such as the aforementioned flow channel. Typically, individual, separate components, such as shut-off valves and / or bypass mechanisms, are used to ensure a sufficiently safe condition and thus a high level of safety. However, the use of such individual components results in high handling costs, particularly in assembly for manufacturing the temperature control device and thus the energy storage device, and in logistics, within the framework of which the individual components are conveyed and / or handled.Interconnecting guides for guiding the temperature control fluid can result in additional costs and can lead to weight disadvantages for the motor vehicle. This can be particularly the case when a large number of individual components are used. The aforementioned problems and disadvantages can now be avoided by the invention, since at least the line elements (supply line elements and return line elements) form the aforementioned structural unit, thus the combined component, which can be handled and installed as a whole, and in particular in a state manufactured and preassembled independently of the energy storage device.

[0013] In order to be able to realize a particularly high level of safety in a particularly needs-based manner, one embodiment of the invention provides that a bypass valve element is also arranged in the housing, which can be switched between a supply state and a bypass state. For example, the bypass valve element is movable relative to the housing, in particular translationally and / or rotationally, between at least one supply position causing the supply state and at least one bypass position causing the bypass state. In the supply state, the temperature control fluid flowing through the supply line element can be introduced into the energy storage device via the supply line element, i.e., can be fed to the energy storage device.In other words, the bypass valve element is adjusted to direct the temperature control fluid flowing through the supply line element into the energy storage device, rather than via the bypass line element into the return line element, bypassing the energy storage device. In particular, it is conceivable that, in the supply state, a portion of the supply line element arranged upstream of the bypass valve element in the flow direction of the temperature control fluid flowing through the supply line element is fluidly connected to the energy storage device, in particular to the flow channel, via the bypass valve element.Alternatively or additionally, it is conceivable that, for example, the bypass line element is separated from the feed line element in the supply state by means of the bypass valve element, in particular at a location arranged upstream of the energy storage device and in particular in the housing, so that upstream of the energy storage device and in particular in the housing, the temperature control fluid cannot flow from the feed line element into the return line element via the bypass line element. Thus, the temperature control fluid flowing through the feed line element, in particular the entire temperature control fluid, can be branched off from the feed line element via the bypass valve element, introduced into the bypass line, and introduced into the return line element via the bypass line, bypassing the energy storage device, so that the temperature control fluid flowing through the bypass line element does not flow into the energy storage device and does not flow through the energy storage device.

[0014] Since the bypass line element extends within the housing and thus outside the energy storage device, in particular completely, and since the line elements are arranged within the housing and therefore extend within the housing, the temperature control fluid can bypass the energy storage device in the housing and outside the energy storage device and thus flow directly from the supply line element into the return line element via the bypass line element, bypassing the energy storage device. This allows the temperature control device and thus the energy storage device, which can in particular be a component of the temperature control device, to be manufactured quickly and cost-effectively.

[0015] A further embodiment is characterized in that the bypass valve element can be electrically switched at least from the supply state to the bypass state. Preferably, the bypass valve can also be electrically switched to the supply state. This allows for particularly demand-based switching of the bypass valve element, thus providing a particularly high level of safety in a simple manner.

[0016] In order to achieve a particularly high level of safety in a particularly simple manner, a further embodiment provides a temperature sensor arranged in the housing and in the flow line element, by means of which a temperature of the temperature control fluid flowing through the flow line element can be detected. This makes it possible to ensure that a maximum permissible flow temperature of the temperature control fluid in the energy storage device is not exceeded. In other words, it can be ensured that the temperature control fluid does not flow into the energy storage device at an excessively high temperature.In this case, it is conceivable, for example, that the bypass valve element can be switched, in particular purely electrically, depending on the temperature of the temperature control fluid detected by the temperature sensor, in particular by means of an electronic computing device, which can be part of the temperature control device, and preferably at least from the supply state to the bypass state. For example, the temperature sensor provides a signal, in particular an electrical one, which can realize the temperature of the temperature control fluid detected by the temperature sensor. The electronic computing device is designed, for example, to receive the signal.Furthermore, the electronic computing device can be designed to control the bypass valve element, in particular electrically, as a function of the received signal, i.e. as a function of the temperature of the cooling fluid detected by the temperature sensor, and thereby cause the bypass valve element to switch from the supply state to the bypass state. As a result, it can be prevented that the temperature control fluid flows into the energy storage device at an excessively high temperature. For example, the bypass valve element is switched from the supply state to the bypass state, in particular by means of the electronic computing device, when it is determined, in particular by means of the electronic computing device, that the temperature of the temperature control fluid detected by the temperature sensor exceeds a predeterminable or predetermined threshold value.

[0017] Since the bypass valve element is also arranged in the housing, the bypass valve element is also part of the previously described assembly, so that the temperature control device and thus the energy storage device can be manufactured particularly easily and thus in a time- and cost-effective manner.

[0018] Since the temperature sensor is arranged in the housing, the temperature sensor is also part of the aforementioned assembly, so that the temperature control device can be manufactured particularly easily and thus in a time- and cost-effective manner.

[0019] In order to be able to detect the temperature of the tempering fluid in the flow line element particularly advantageously and thus to achieve a particularly high level of safety, it is provided in a further embodiment of the invention that the temperature sensor is arranged upstream or downstream of the bypass valve element in the flow direction of the tempering fluid flowing through the flow line element and thereby flowing towards and into the energy storage device.

[0020] In a further, particularly advantageous embodiment of the invention, a valve element is arranged in the housing and in the return line element. The valve element is also a component of the structural unit, so that the temperature control device can be manufactured simply, quickly, and cost-effectively. The valve element can be used to prevent a flow of the temperature control fluid from the return line element into the energy storage device, also referred to as backflow. For example, the bypass line element can be fluidly connected or connected to the return line element at a connection point, so that the temperature control fluid flowing through the bypass line element can flow out of the bypass line element at the connection point and into the return line element.It has proven particularly advantageous if the aforementioned valve element is arranged upstream of the connection point in the flow direction of the tempering fluid flowing through the return line element. This prevents the tempering fluid flowing through the bypass line element and bypassing the energy storage device from flowing from the return line element into the energy storage device, thus ensuring a particularly high level of safety.

[0021] In order to keep costs particularly low, a further embodiment of the invention provides that the valve element is designed as a non-return valve, in particular a spring-loaded one.

[0022] In order to be able to prevent a backflow of the temperature control fluid from the return line element into the energy storage device in a particularly needs-based and safe manner, it is provided in a further embodiment of the invention that the valve element can be switched, in particular actively, between a connected state and a separated state.In the connected state, a first longitudinal region of the return line element, arranged upstream of the valve element in the flow direction of the temperature control fluid flowing through the return line element and flowing away from the energy storage device, is fluidically connected via the valve element to a second longitudinal region, arranged downstream of the first longitudinal region and downstream of the valve element in the flow direction of the temperature control fluid flowing through the return line element and flowing away from the energy storage device, so that, in particular in a normal state, the temperature control fluid can be discharged from the energy storage device via the return line element. In other words, in the connected state, the valve element allows the temperature control fluid from the energy storage device to flow through the first longitudinal region, flow out of the first longitudinal region, and flow into the second longitudinal region.In the separated state, however, the lengths are separated from each other, so that the temperature control fluid cannot flow from the second length back into the first length. In particular, it is provided that the aforementioned connection point is arranged in the second length.

[0023] In particular, it is conceivable that the valve element can be switched electrically, i.e., by energizing the valve element, i.e., by supplying the valve element with electrical current, from the disconnected state to the connected state. Preferably, it is provided that, in the de-energized state of the valve element, i.e., when the supply of electrical current to the valve element is discontinued, the valve element assumes the disconnected state or returns from the connected state to the disconnected state.

[0024] In order to achieve particularly high levels of safety in a particularly needs-based manner, a further embodiment of the invention provides for the valve element to be switchable mechanically, hydraulically, or electrically from the connected state to the disconnected state and / or from the disconnected state to the connected state. For example, the valve element can be moved relative to the housing, in particular translationally and / or rotationally, between at least one connection point bringing about the connected state and at least one disconnected position bringing about the disconnected state.

[0025] A second aspect of the invention relates to a motor vehicle, preferably designed as a motor vehicle, in particular as a passenger car, which has a temperature control device according to the first aspect of the invention. Advantages and advantageous embodiments of the first aspect of the invention are to be regarded as advantages and advantageous embodiments of the second aspect of the invention, and vice versa.

[0026] Further details of the invention will become apparent from the following description of preferred embodiments with the accompanying drawings. Fig. 1 shows a partial schematic representation of a first embodiment of a temperature control device for controlling the temperature of an electrical energy storage device for a motor vehicle; Fig. 2 shows a partial schematic representation of a second embodiment of the tempering device; Fig. 3 shows a partial schematic representation of a third embodiment of the temperature control device; and Fig. 4 shows a partial schematic representation of a fourth embodiment of the tempering device.

[0027] In the figures, identical or functionally identical elements are provided with the same reference symbols.

[0028] Fig. 1 shows a partial schematic representation of a first embodiment of a temperature control device 1 for controlling the temperature of an electrical energy storage device 2 for a motor vehicle. This means that the motor vehicle, preferably designed as a motor vehicle, in particular as a passenger car, in its fully manufactured state has the temperature control device 1 and the energy storage device 2, which in this case is a component of the temperature control device 1. The energy storage device 2 is a high-voltage component. The energy storage device 2 comprises a storage housing 3, which, in particular directly, delimits a receiving space 4. Furthermore, the energy storage device 2 comprises Fig. 1, which are not shown, are formed separately from one another and thus as individual cells. Electrical energy, in particular electrochemically, is to be stored or stored by means of the storage cells and thus by means of the energy storage device 2. The storage cells are arranged in the receiving space 4.

[0029] The energy storage device 2 is arranged in a temperature control circuit through which a temperature control fluid can flow, which is also referred to as a temperature control circuit. The temperature control fluid is preferably a liquid. The energy storage device 2, in particular the storage cells, can be temperature-controlled, i.e., cooled and / or heated, by means of the temperature control fluid. Preferably, the temperature control fluid is a coolant or can at least be used as a coolant by means of which the energy storage device 2, in particular the storage cells, can be cooled. The temperature control fluid can flow through the energy storage device 2, in particular the storage housing 3, and thereby temperature-control the energy storage device 2. In particular, at least one flow channel through which the temperature control fluid can flow can run in the energy storage device 2, in particular in the storage housing 3.Thus, the energy storage device 2, in particular the storage cells, can be tempered by means of the flow channel and by means of the tempering fluid flowing through the flow channel.

[0030] The temperature control device 1 has a flow line element 5, which is also referred to as a flow line or supply line, supply line element, supply line, or inlet. The flow line is through which the temperature control fluid can flow and is preferably arranged in the temperature control circuit. Via the flow line (flow line element 5), the temperature control fluid flowing through the flow line can be introduced into the energy storage device 2, and in particular into the storage housing 3, thus into the flow channel. Fig. 1 it can be seen that the flow runs outside the energy storage device 2 and in particular outside the storage housing 3 and thus in an environment 6 of the energy storage device 2 surrounding the energy storage device 2, in particular the storage housing 3, so that by means of the flow the temperature control fluid flowing through the flow can be introduced into the energy storage device 2 from outside the energy storage device 2, i.e. from or from the environment 6. For this purpose, the flow has an inlet 7, via which, as in Fig. 1 is represented by an arrow 8, the tempering fluid can be introduced into the supply line. The supply line (supply line element 5) also has an outlet 9, via which the tempering fluid flowing through the supply line can be discharged from the supply line and subsequently introduced into the energy storage device 2. In the fully manufactured state of the tempering device 1, for example, the supply line is fluidically connected to the energy storage device 2, in particular the flow channel, via the outlet opening. The tempering device 1 also has a return line element 10, which is also referred to as a return line or return line and through which the tempering fluid can flow or is flowed, in particular after the tempering fluid has flowed through the supply line and then the energy storage device 2, i.e. the flow channel.The temperature control fluid flowing through the energy storage device 2 can be discharged from the energy storage device 2 via the return line, as illustrated by arrows 11 and 12. An arrow 13 illustrates the temperature control fluid flowing through the outlet 9 and thus flowing out of the supply line via the outlet 9 and into the energy storage device 2, in particular into the flow channel.

[0031] The return line (return line element 10) has a second inlet 14, via which, as illustrated by arrow 12, the temperature control fluid flowing out of the energy storage device 2, in particular from the flow channel, can be introduced into the return line or flows into it. The temperature control fluid then flows out of the energy storage device 2 through the return line. The return line (return line element 10) has a second outlet 15, via which the temperature control fluid flowing through into the return line and thereby flowing away from the energy storage device 2 can be discharged from the return line and thus led away from the energy storage device 2. This is illustrated by arrow 11. Fig. 1 shows that the line elements of the energy storage device 2 thus extend into the environment 6, so that the temperature control fluid flowing out of the energy storage device 2 and flowing into the return line via the second inlet 14 flows out of the energy storage device 2 and into or into the environment 6. Thus, for example, the return line as well as the supply line belong to the environment 6.

[0032] In order to manufacture the temperature control device 1 in a particularly time- and cost-effective manner and at the same time achieve a particularly high level of safety, the line elements (supply and return) are arranged in a housing 16 common to the line elements. The housing 16 and the storage housing 3 are components formed separately from one another and at least indirectly, in particular directly, connected to one another. In particular, the housing 16 and the storage housing 3 are at least indirectly, in particular directly, mechanically connected to one another, whereby the supply and return are fluidically connected to the energy storage device, in particular to the storage housing 3 and very particularly to the aforementioned flow channel. In particular, the arrow 12 illustrates the temperature control fluid flowing out of the flow channel and flowing into the return via the second inlet 14.

[0033] Also arranged in the housing 16 is a bypass line element 17, which preferably extends entirely within the housing 16. It can be seen that the housing and the bypass line element 17 are arranged outside the energy storage device 2. The bypass line element 17 is fluidically connected to the supply line and the return line, whereby the energy storage device 2 can be bypassed by the temperature control fluid flowing through the supply line, i.e., at least a portion of the supply line, via the bypass line element 17. This will be explained in more detail below.

[0034] At the Fig. In the first embodiment shown in Figure 1, the bypass line element 17 is fluidically connectable or connectable to the return line at a first connection point V1. Furthermore, the bypass line element 17 is fluidically connectable or connectable to the supply line at a second connection point V2. The bypass line element 17 is also referred to as a bypass line, bypass, or bypass line. By means of the bypass line (bypass line element 17), the temperature control fluid flowing through the supply line, in particular the entire temperature control fluid, can be branched off from the supply line at the connection point V2 and introduced into the bypass line.The tempering fluid branched from the flow line via the bypass line and thereby introduced into the bypass line flows through the bypass line and thereby bypasses the energy storage device 2, so that the tempering fluid flowing through the bypass line does not flow into the energy storage device 2 via the flow line and does not flow through the energy storage device 2. The tempering fluid flowing through the bypass line is guided from the connection point V2 to the connection point V1 and introduced into the return line at the connection point V1, whereupon the tempering fluid flowing through the bypass line can flow through the return line.By means of the bypass line, it is possible, for example, to prevent an excessive amount of the temperature control fluid from flowing through the supply line if a leak has occurred in the energy storage device 2, for example in the flow channel, and thus an excessive amount of the temperature control fluid from penetrating into areas arranged in the energy storage device 2 in which an excessive amount of the temperature control fluid could be detrimental.

[0035] The housing 16, the bypass line element 17, the flow line element 5, and the return line element 10 form a structural unit 18 that is, in particular completely assembled and mounted when viewed on its own and / or independently of the energy storage device 2, which is also referred to as a combined component. The structural unit 18 can be handled, in particular in a pre-assembled and manufactured state, and can be mounted, in particular, on the energy storage device 2, whereby the temperature control device 1 can be manufactured particularly easily and thus in a time- and cost-effective manner. For example, to manufacture the temperature control device 1, the structural unit 18 is handled and arranged, in particular directly, on the storage housing 3, in particular such that the housing 16 is, in particular directly, mechanically connected to the storage housing 3.As a result, the return flow and the supply flow are fluidically connected to the energy storage device 2, in particular the flow channel.

[0036] In the first embodiment, the assembly 18 comprises a bypass valve element 19, which is also simply referred to as a bypass valve. The bypass valve is arranged in the housing 16 and in the supply line and in the bypass line. In particular, the bypass valve is arranged, for example, at the connection point V2, in particular in the supply line. The bypass valve can be switched between a supply state V and a bypass state U, wherein the bypass valve is in Fig. 1 is in the bypass state U. In the supply state V, the temperature control fluid flowing through the supply line can be fed to the energy storage device 2 via the supply line, and thus can be introduced into the energy storage device 2, in particular into the storage housing 3 and very particularly into the flow channel, in particular from outside, i.e. from the environment 6. For this purpose, for example, in the supply state V, a first length region L1 of the supply line is fluidically connected via the bypass valve to a second length region L2 of the supply line. The length region L1 is arranged in the flow direction of the temperature control fluid flowing through the supply line upstream of the bypass valve and upstream of the length region L2 and upstream of the outlet 9 and upstream of the energy storage device 2, so that the length region L2 is arranged downstream of the length region L1, downstream of the bypass valve and upstream of the outlet 9 and upstream of the energy storage device 2.

[0037] In the supply state V, the bypass line is separated from the length range L1 and in particular also from the length range L2, in particular from the flow, by means of the bypass valve at the connection point V2, so that the tempering fluid flowing through the flow is not branched off from the flow and introduced into the bypass line.

[0038] In the bypass state U, however, the length range L1 is separated from the length range L2 by means of the bypass valve, and the length range L1 is fluidly connected to the bypass line (bypass line element 17) at the connection point V2 via the bypass valve. Thus, the tempering fluid flowing through the length range L1 is branched off from the supply line at the connection point V2 via the bypass valve and directed into the bypass line, so that the tempering fluid flowing through the length range L1 cannot flow from the length range L1 into the length range L2 and thus cannot flow into the energy storage device 2. The tempering fluid introduced into the bypass line flows through the bypass line and is guided to the connection point V1 via the bypass line and is introduced into the return line at the connection point V1. The tempering fluid flowing through the bypass line does not flow into the energy storage unit and does not flow through the energy storage unit.Thus, in the bypass state U, the tempering fluid flowing through the flow can be branched off from the flow via the bypass valve, introduced into the bypass line and introduced into the return line via the bypass line, bypassing the energy storage device 2.

[0039] The bypass valve is also referred to as a bypass valve and can preferably be switched electrically at least from the supply state V to the bypass state U, for example by means of an electronic computing device not shown in the figures. The assembly 18 also comprises a temperature sensor 21 arranged in the housing 16 and in the flow line, by means of which the temperature of the tempering fluid flowing through the flow line can be detected. Fig. In the embodiment shown in Figure 1, the temperature sensor 21 is arranged downstream of the bypass valve in the flow direction of the tempering fluid flowing through the feed line.

[0040] Furthermore, the Fig. In the embodiment shown in Figure 1, the assembly 18 includes a valve element 20 arranged in the housing 16, which is located in the return line. The valve element 20 can be used to prevent the flow of the temperature control fluid from the return line via the inlet 14 into the energy storage device 2. In the first embodiment, the valve element 20 can be switched, for example, mechanically, hydraulically, or electrically, between a connected state VZ and a disconnected state T.In the connection state VZ, a third longitudinal region L3 of the return line, arranged upstream of the valve element 20 in the flow direction of the temperature control fluid flowing through the return line and thereby flowing away from the energy storage device 2, is fluidically connected via the valve element 20 to a fourth longitudinal region L4 of the return line, arranged downstream of the longitudinal region L3 and downstream of the valve element 20 in the flow direction of the temperature control fluid flowing through the return line and thereby flowing away from the energy storage device 2. It can be seen that, in the flow direction of the temperature control fluid flowing through the return line, the longitudinal region L3 is arranged upstream of the longitudinal region L4 and upstream of the outlet 15, and the longitudinal region L3 is arranged downstream of the inlet 14. The length range L4 is arranged downstream of the length range L3 and downstream of the valve element 20 and upstream of the outlet 15.It can also be seen that the connection point V1 is arranged in the length range L4. In the separation state T, the length ranges L3 and L4 are separated from one another by the valve element 20, so that the temperature control fluid flowing out of the bypass line at the connection point V1 and flowing into the length range L4 cannot flow back from the length range L4 via the valve element 20, the length range L3, and the inlet 14 into the energy storage device 2. This reliably prevents an excessive amount of temperature control fluid from undesirably flowing into the energy storage device 2, for example in the event of a fault.

[0041] In particular, the bypass valve is, for example, an electrically controlled or controllable bypass valve in the temperature control circuit. Both the return and the supply lines, as well as the bypass line, the bypass valve, the valve element 20, and the temperature sensor 21 are integrated into the housing 16 or into the assembly 18. In particular, the valve element 20 can prevent an unintentional backflow or overflow of the temperature control fluid into the energy storage device 2, also referred to simply as the storage device. The return line is also referred to as the return path, in which the valve element 20 is integrated, which can be controlled or actuated mechanically, hydraulically, or electrically, for example.The bypass valve element 19 and the valve element 20 and the temperature sensor 21 and preferably also the return line, the flow line and the bypass line are parts or components which are integrated into the housing 16 common to the components and form the structural unit 18.

[0042] In order to achieve particularly efficient installation space and to be able to keep the proportion or number of lines required for conducting the temperature control fluid particularly low, the structural unit 18 can be mounted directly on the energy storage device 2, in particular on the storage housing 3, which is to be understood in particular as meaning that the housing 16 preferably directly touches the storage housing 3, or for example the housing 16 is supported on the storage housing 3 by means of preferably exactly one sealing element, which is designed in particular separately from the storage housing 3 and / or separately from the housing 16. By means of the sealing element, for example, the outlet 9 and the inlet 14 or the flow and the return are sealed, in particular with respect to the environment 6.Because the temperature control fluid can bypass the energy storage device 2 via the bypass line, it can be ensured that other components arranged in the temperature control circuit in addition to the energy storage device 2, which are arranged, for example, downstream of the connection point V1 in the flow direction of the temperature control fluid flowing through the temperature control circuit, continue to be supplied with the temperature control fluid, even though the energy storage device 2 is shut off, in particular for safety reasons, so that the bypass valve element 19 is in the bypass state U and preferably the valve element 20 is in the separation state T.

[0043] Fig. Figure 2 shows a second embodiment of the temperature control device 1. The second embodiment differs from the first embodiment in particular in that the valve element 20 in the second embodiment is designed as a spring-loaded check valve, which allows a flow of the temperature control fluid from the length range L3 via the check valve to and into the length range L4, but prevents a reverse flow of the temperature control fluid from the length range L4 via the check valve into the length range L3. This allows costs to be kept particularly low.

[0044] Fig. 3 shows a third embodiment of the temperature control device 1. The third embodiment differs from the first embodiment in particular in that the temperature sensor 21 is arranged upstream of the bypass valve element 19 and in particular upstream of the connection point V2.

[0045] Finally, Fig. 4 shows a fourth embodiment of the temperature control device 1. The fourth embodiment differs from the third embodiment only in that the valve element 20 is designed as a spring-loaded check valve. Fig. 4 illustrates that the assembly 18 is held directly on the storage housing 3.

Claims

[1] Temperature control device (1) for temperature control of an electrical energy storage device (2) for a motor vehicle, comprising a liquid temperature control fluid, comprising a supply line element (5) through which the temperature control fluid can flow for temperature control of the energy storage device (2) as the first line element, via which the temperature control fluid flowing through the supply line element (5) can be introduced into the energy storage device (2), and comprising a return line element (10) through which the temperature control fluid can flow, as the second line element, via which the temperature control fluid flowing through the energy storage device (2) can be discharged from the energy storage device (2), wherein the energy storage device (2) has a plurality of storage cells for storing the electrical energy and a storage housing (3) in which the storage cells are arranged, characterized byin that the line elements formed separately from the storage housing (3) and running outside the storage housing (3) are arranged in a housing (16) which is common to the line elements and is arranged outside the storage housing (3), in which housing there is also arranged a bypass line element (17) which is fluidically connected or connectable to the line elements and runs outside the storage housing (3), via which bypass line element the energy storage device (2) is to be bypassed by the temperature control fluid, wherein the housing (16), the bypass line element (17), the feed line element (5) and the return line element (10) form a structural unit (18) which is assembled and mounted independently of the energy storage device (2) and can be handled as a whole in its assembled and mounted state. [2] Tempering device (1) according to claim 1, characterized by that a bypass valve element (19) is also arranged in the housing (16), which can be switched between: - a supply state (V) in which the tempering fluid flowing through the flow line element (5) can be supplied to the energy store (2) via the flow line element (5), and - a bypass state (U), in which the tempering fluid flowing through the flow line element (5) can be branched off from the flow line element (5) via the bypass valve element (19), introduced into the bypass line element (17) and introduced into the return line element (10) via the bypass line element (17), bypassing the energy store (2). [3] Tempering device (1) according to claim 2, characterized by that the bypass valve element (19) can be electrically switched at least from the supply state (V) to the bypass state (U). [4] Tempering device (1) according to one of the preceding claims, characterized bythat a temperature sensor (21) is also arranged in the housing (16) and in the flow line element (5), by means of which a temperature of the tempering fluid flowing through the flow line element (5) can be detected. [5] Tempering device (1) according to claim 4 in its reference to claim 2 or 3, characterized by that the temperature sensor (21) is arranged upstream or downstream of the bypass valve element (19). [6] Tempering device (1) according to one of the preceding claims, characterized by that a valve element (20) is arranged in the housing (16) and in the return line element (10), by means of which a flow of the tempering fluid from the return line element (10) into the energy store (2) can be prevented. [7] Tempering device (1) according to claim 6, characterized by that the valve element (20) is designed as a non-return valve, in particular a spring-loaded one. [8] Tempering device (1) according to claim 6, characterized by that the valve element (20) can be switched between: - a connection state (VZ), in which a first length region (L3) of the return line element (10), arranged upstream of the valve element (20) in the flow direction of the tempering fluid flowing through the return line element (10) and away from the energy storage device (2), is fluidically connected via the valve element (20) to a second length region (L4), arranged downstream of the first length region (L3) and downstream of the valve element (20), in the flow direction of the tempering fluid flowing through the return line element (10) and away from the energy storage device (2), and - a separation state (T) in which the length regions (L3, L4) are fluidically separated from one another by means of the valve element (20). [9] Tempering device (1) according to claim 8, characterized bythat the valve element (20) can be switched mechanically, hydraulically or electrically from the connected state (VZ) to the separated state (T) and / or from the separated state (T) to the connected state (VZ). [10] Motor vehicle, with a temperature control device (1) according to one of the preceding claims.

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