DEVICE FOR CONTROLLING THE TEMPERATURE OF AN ELECTRICAL ENERGY STORE ON THE MOTOR VEHICLE SIDE

Abstract

The invention relates to a device for controlling the temperature of an electrical energy store on the motor vehicle side, comprising at least one temperature control system having at least one pettier element, which can be thermally coupled, or is thermally coupled, with the electrical energy store on the motor vehicle side, or to an electrical energy store on the motor vehicle side to be temperature-controlled, wherein in addition, the at least one temperature control system is thermally coupled with at least one temperature-control fluid reservoir containing at least one temperature-control fluid

Claims

1. A device for controlling temperature of an electrical energy store on a motor vehicle side comprising: at least one temperature control system having at least one peltier element, which can be thermally coupled or is thermally coupled with the or an electrical energy store on the motor vehicle side to be temperature-controlled, wherein the at least one temperature control system is thermally coupled with at least one temperature-control fluid reservoir containing at least one temperature-control fluid.

2. The device according to claim 1, wherein a temperature control system is thermally coupled with an electrical energy store via at least one first heat exchanger connected between the temperature control system the electrical energy store, through which a temperature-control medium.

3. The device according to claim 1, wherein the temperature control system is thermally coupled with the at least one temperature-control fluid reservoir via at least one additional heat exchanger connected between the temperature control system and the temperature-control fluid reservoir.

4. The device according to claim 3, at least one additional heat exchanger is connected to the temperature-control fluid reservoir to form a temperature control circuit through which the temperature-control fluid can flow or flows.

5. The device according to claim 1, wherein at least one first conveying system for conveying the or a temperature-control medium along at least one heat exchange surface on the temperature control system side or along a heat exchange surface of a heat exchanger downstream of the temperature control system.

6. The device according to claim 3, wherein at least one additional conveying system for conveying the temperature-control fluid through the or a temperature control circuit connecting the heat exchanger to the temperature-control fluid reservoir.

7. The device according to claim 1, wherein the temperature-control fluid is water or a mixture of water and at least one organic fluid.

8. An energy store arrangement, comprising at least one electrical energy store on the motor vehicle side and at least one device according to claim 1.

9. The energy store arrangement according to claim 8, wherein an accommodation system comprising an accommodation space which can be or is closed off from the outside for accommodating the at least one electrical energy store, and the device.

10. A motor vehicle, comprising at least one energy store arrangement according to claim 8.

11. The motor vehicle according to claim 10, wherein at least one temperature-control fluid reservoir is thermally coupled with at least one temperature control system on the motor vehicle side for controlling the temperature of an object on the motor vehicle side, that is at least one steering, seat or mirror temperature control system on the motor vehicle side, and/or with a temperature control system on the motor vehicle side for controlling the temperature of a passenger compartment area on the motor vehicle side, in particular with at least one air conditioner on the motor vehicle side, and/or the body of the motor vehicle, in particular at least one exposed external surface of the body of the motor vehicle and/or with a drive unit on the motor vehicle side.

12. The motor vehicle according to claim 11, wherein at least one heat exchanger thermally coupled with the temperature-control fluid reservoir is integrated in the exposed external surface of the body of the motor vehicle that is thermally coupled with the at least one temperature-control fluid reservoir or in a component on the motor vehicle side that comprises such an external surface.

13. The motor vehicle according to claim 11, wherein the exposed external surface of the body of the motor vehicle that is thermally coupled to the at least one temperature-control fluid reservoir is an undercarriage of the motor vehicle.

14. The device according to claim 2, wherein the temperature control medium is a gaseous temperature-control medium that can flow or flows.

15. The device according to claim 2, wherein the temperature control system is thermally coupled with the at least one temperature-control fluid reservoir via at least one additional heat exchanger connected between the temperature control system and the temperature-control fluid reservoir.

16. The device according to claim 2, wherein at least one first conveying system for conveying the or a temperature-control medium along at least one heat exchange surface on the temperature control system side or along a heat exchange surface of a heat exchanger downstream of the temperature control system.

17. The device according to claim 15, wherein at least one first conveying system for conveying the or a temperature-control medium along at least one heat exchange surface on the temperature control system side or along a heat exchange surface of a heat exchanger downstream of the temperature control system.

18. The device according to claim 4, wherein at least one additional conveying system for conveying the temperature-control fluid through the or a temperature control circuit connecting the heat exchanger to the temperature-control fluid reservoir.

19. The device according to claim 6, wherein the temperature-control fluid is water or a mixture of water and at least one organic fluid, one of which is glycol.

20. The motor vehicle according to claim 12, wherein the exposed external surface of the body of the motor vehicle that is thermally coupled to the at least one temperature-control fluid reservoir is an undercarriage of the motor vehicle.

Description

[0042] FIG. 1 shows a basic representation of a device 1 for controlling the temperature of an electrical energy store 2 on the motor vehicle side, mounted on the motor vehicle side, according to an embodiment example of the invention. The energy store 2 is, for example, as lithium energy store comprising several electrically interconnected, lithium-based energy storage cells (not shown) accommodated in a common energy store housing (not shown). The energy store 2 is used in general for the electrical supply of an electrical consumer on the motor vehicle side and accordingly it is connected to an on-board network (not shown) on the motor vehicle side.

[0043] The device 1 comprises at least one temperature control system 3 comprising a peltier element (not shown). The temperature control system 3 is thermally coupled with the energy store 2 to be temperature-controlled. Accordingly, the energy store 2 can be heated or cooled by means of the temperature control system 3. The electrical supply of the peltier element required for the operation thereof occurs via the energy store 2 to be temperature-controlled.

[0044] The thermal coupling between the temperature control system 3 and the energy store 2 is implemented via a heat exchanger 4 connected between said temperature control system and said energy store, In this context, the heat exchanger 4 is connected by means of a channel structure 5, indicated by the arrows, delimiting at least one flow channel through which a temperature-control medium such as air, for example, can flow.

[0045] A first conveying system 6 in the form of a blower system is located upstream of the channel structure 5 and used for conveying the temperature-control medium through the channel structure 5, along a heat exchanger surface of the heat exchanger 4 protruding into the channel structure 5 and further on into the energy store 2. Typically, only a single conveying system 6 is provided, which results in comparatively low noise generation during operation of the device 1.

[0046] The device 1 moreover comprises a temperature-control fluid reservoir 7 containing a temperature-control fluid such as water, for example, in the form of a simple fluid container or tank, for example. One can see that the temperature control system 3 is also thermally coupled with the temperature-control fluid reservoir 7. The thermal coupling between the temperature control system 3 and the temperature-control fluid reservoir 7 is implemented via an additional heat exchanger 8 connected between the temperature control system and the temperature-control fluid reservoir.

[0047] It is apparent that the additional heat exchanger 8 is connected to the temperature-control fluid reservoir 7 forming a temperature control circuit through which the temperature-control fluid flows. For this purpose, between the additional heat exchanger 8 and the temperature-control fluid reservoir, a line structure 9 is formed, within which the temperature-control fluid can flow circularly or circulate circularly from the temperature-control fluid reservoir 7 into the additional heat exchanger 8, and vice versa. The line structure 9 comprises a supply line 9a from the temperature-control fluid reservoir 7 into the additional heat exchanger 8, and a supply line 9b from the additional heat exchanger 8 into the temperature-control fluid reservoir 7. The supply lines 9a, 9b again are represented by arrows.

[0048] Integrated in the temperature-control fluid reservoir 7 is a conveying system 10 in the form of a pump system, which is used for conveying the temperature-control fluid through the line structure 9 or between the temperature-control fluid reservoir 7 and the additional heat exchanger 8. Naturally, an additional conveying system 10 can also be connected, for example, in the line structure 9.

[0049] The temperature-control fluid reservoir 7 or the temperature-control fluid is used as heat sink or heat source associated with the temperature control system 3 and leads to a considerable increase in the performance or the efficiency of the temperature control system 3 or the device 1, respectively. The energy store 2 can accordingly be temperature-controlled, i.e.heated or cooled, very efficiently.

[0050] The temperature-control fluid reservoir 7 is moreover thermally coupled with the body 11 of the motor vehicle 12 or with a component adjoining the body 11 of the motor vehicle 12, or with a system adjoining the body 11 of the motor vehicle 12, such as, for example, a temperature control system 13 on the motor vehicle side air controlling the temperature of a passenger compartment area, i.e., in particular, with an air conditioner on the motor vehicle side, or a temperature control system 14 for controlling the temperature of an object on the motor vehicle side, such as, for example, a steering, seat or mirror temperature control system on the motor vehicle side.

[0051] Via the temperature control systems 13, 14, heat can be introduced, into the temperature control fluid reservoir 7 and thus into the temperature-control fluid, which can be advantageous for a particularly efficient heating operation of the device 1. In the same way, via the temperature control systems 13, 14, heat can also be removed from the temperature-control fluid reservoir 7 and thus from the temperature-control fluid, which can be advantageous for a particularly efficient cooling operation of the device 1.

[0052] The temperature-control fluid reservoir 7 is, in addition, thermally coupled with an exposed external surface of the body 11 of the motor vehicle 12, such as, for example, an undercarriage. In this way, via the airflow produced when the motor vehicle 12 is moving, heat can also be removed from the temperature-control fluid reservoir 7.

[0053] Integrated in the exposed outer surface of the body 11 of the motor vehicle 12 that is thermally coupled with the at least one temperature-control fluid reservoir 7, there can be at least one additional heat exchanger (not shown), thermally coupled with the temperature-control fluid reservoir 7.

[0054] FIG. 2 shows a basic representation of as device 1 for controlling the temperature of an electrical energy store 2 on the motor vehicle side, according to an additional embodiment of the invention.

[0055] hi contrast to the embodiment example shown in FIG. 1, the energy store arrangement, unspecified but already present in FIG. 1, consisting of energy store 2 and device 1, can here comprise an accommodation system 16, which delimits an accommodation space 15 and which is closed, i.e., sealed of from the outside, in which the device 1 as well as the energy store 2 are accommodated. The accommodation system 16 can have a trough-like shape.

[0056] In this way, during operation of the device 1, four different temperature-controlled zones can be formed, i.e., temperature control zones TZ1, TZ2, TZ3, TZ4 having four respective different temperatures and thus different heat contents. In this context, the temperature-control medium flows in particular through the temperature control zones TZ1 and TZ2. The flow of the temperature-control medium is represented by the arrows.

[0057] A first temperature control zone TZ1 is formed within the energy store 2 to be temperature-controlled. A second temperature control zone TZ2 is formed by the area of the accommodation space 15 surrounding on the outside the energy store 2 to be temperature-controlled within the accommodation system 16. A third temperature control zone TZ3 is formed by the temperature control circuit, formed between the temperature control system 3 and the temperature-control fluid reservoir 7, through which the temperature-control fluid flows. A fourth temperature control zone TZ4 is formed by the area surrounding the accommodation system 16 on the outside, i.e., the surrounding area outside of the accommodation system 16.

[0058] In a heating operation of the device 1, the temperature-control medium is heated by means of the temperature control system 3 in such a manner that the highest temperature prevails in the first temperature control zone TZ1. The temperature of the first temperature control zone TZ1 accordingly is above the temperature of the remaining temperature control zones TZ2, TZ3, TZ4. Accordingly, in the first temperature control zone TZ1, a heating or warming of the energy store 2 occurs, The outlet temperature of the temperature-control medium exiting from the energy store 2 into the accommodation space 15 is below the inlet temperature into the energy store 2 due to heating or warming of the energy store 2 and thus the release of heat to the energy store 2.

[0059] In the same way, the outlet temperature of the temperature-control medium exiting from the energy store 2 into the accommodation space 15 is typically above the temperature of the medium present in the accommodation space 15, which is typically also air, so that the second temperature control zone TZ2 is also heated. In this way, an additional heating of the external surfaces of the energy store 2 or of the energy store housing, respectively, and thus a very efficient heating operation of the device 1 are achieved.

[0060] In the third temperature control zone TZ3, the heat required for heating the temperature-control medium before the entry into the energy store 2 and thus into the first temperature control zone TZ1 is supplied via the temperature control system 3. Here, the temperature-control fluid reservoir 7 or the temperature-control fluid, respectively, is used as heat source, in order to promote the fastest and most efficient possible heating of the temperature-control medium. The temperature-control fluid reservoir 7 or the temperature-control fluid, respectively, is cooled in the process by removal of heat. Therefore, the temperature or the heat content of the temperature-control fluid reservoir 7 or of the temperature-control fluid, respectively, decreases. However, as mentioned, via heat releasing or heat generating components or systems present on the motor vehicle side, heat can be supplied to the temperature-control fluid reservoir 7. Corresponding heat releasing or heat generating systems present On the motor vehicle side can be for example, the temperature control system 13 on the motor vehicle side for controlling the temperature of a passenger compartment area on the motor vehicle side.

[0061] In a cooling operation of the device 1, the temperature-control medium is cooled by means of the temperature control system 3 in such a manner that the lowest temperature prevails in the first temperature control zone TZ1, The temperature of the first temperature control zone TZ1 is thus below the temperature of the remaining temperature control zones TZ2, TZ3, TZ4. Accordingly, a cooling of the energy store 2 occurs in the first temperature control zone TZ1. The outlet temperature of the temperature-control medium exiting from the energy store 2 into the accommodation space 15 is above the inlet temperature into the energy store 2 due to cooling of the energy store 2 and thus the absorption of heat from the energy store 2.

[0062] In the same way, the outlet temperature of the temperature-control medium exiting from the energy store 2 into the accommodation space 15 is typically below the temperature of the medium present in the accommodation space 15, so that the second temperature control zone TZ2 is also cooled. In this way, an additional cooling of the external surfaces of the energy store 2 or of the energy store housing, respectively, and thus a very efficient cooling operation of the device 1 are achieved.

[0063] In the third temperature control zone TZ3, the heat required for cooling the temperature-control medium before entry into the energy store 2 and thus into the first temperature control zone TZ1 is removed from the temperature-control medium via the temperature control system 3. In this context, the temperature-control fluid reservoir 7 or the temperature-control fluid, respectively is used as heat sink, in order to promote the fastest and most efficient possible cooling of the temperature-control medium. The temperature-control fluid reservoir 7 or the temperature-control fluid, respectively, is heated in the process by the waste heat of the temperature control system 3. Therefore, the temperature or the heat content of the temperature-control fluid reservoir 7 or of the temperature-control fluid, respectively, increases. However, via heat absorbing or heat requiring components or systems present on the motor vehicle side, heat can also be removed from the temperature-control fluid reservoir 7. Again, corresponding heat absorbing or heat requiring systems present on the motor vehicle side can be, for example, the temperature control system 13 on the motor vehicle side for controlling the temperature of a passenger compartment area on the motor vehicle side.