Battery module including Peltier element and compensation element between temperature regulating element and battery cell

Abstract

A battery module having at least one battery cell is disclosed, in particular a lithium-ion battery cell, comprising a housing, in which the at least one battery cell is accommodated, and a temperature-regulating element, wherein a Peltier element is furthermore arranged between the at least one battery cell and the temperature-regulating element, which Peltier element is thermally conductively connected in each case to the at least one battery cell and the temperature-regulating element, and which Peltier element is furthermore connected to a voltage source in such a way that heat transfer between the at least one battery cell and the temperature-regulating element is able to be formed by means of the Peltier element, wherein a compensation element for homogenizing the temperature, said compensation element being formed from a metallic material, is furthermore arranged between the at least one battery cell and the Peltier element, wherein preferably the at least one battery cell is directly or cohesively connected to the compensation element.

Claims

1. A battery module having at least one battery cell (2), comprising a housing (3), in which the at least one battery cell (2) is accommodated, and a temperature-regulating element (4), wherein a Peltier element (5) is furthermore arranged between the at least one battery cell (2) and the temperature-regulating element (4), wherein the Peltier element is thermally conductively connected in each case to the at least one battery cell (2) and the temperature-regulating element (4), wherein the Peltier element is furthermore connected to a voltage source (6) in such a way that the Peltier element is configured to transfer heat between the at least one battery cell (2) and the temperature-regulating element (4), wherein a compensation element (7) for homogenizing the temperature, said compensation element being formed from a metallic material, is furthermore arranged between the at least one battery cell (2) and the Peltier element (5), and wherein the at least one battery cell (2) is cohesively connected to the compensation element (7) by a thermally conductive adhesive (10) which directly adheres to the at least one battery cell (2) and to the compensation element (7).

2. The battery module according to claim 1, characterized in that the temperature-regulating element (4) is formed by the housing (3) of the battery module (1).

3. The battery module according to claim 1, characterized in that the temperature-regulating element (4) is formed by the housing (3) of the battery module (1), wherein the temperature-regulating element (4) is integrated into the housing (3).

4. The battery module according to claim 1, characterized in that the temperature-regulating element (4) is formed such that a temperature-regulating medium (400) is able to flow through the temperature-regulating element (4).

5. The battery module according to claim 1, characterized in that the voltage source (6) is formed by the at least one battery cell (2).

6. The battery module according to claim 1, characterized in that the battery module (1) furthermore comprises a control unit (600) configured to drive the voltage source (6).

7. The battery module according to claim 1, characterized in that an electronic element (11) of the battery module (1) is arranged at a side (110) of the temperature-regulating element (4) facing away from the at least one battery cell (2).

8. The battery module according to claim 1, characterized in that the battery module (1) has a plurality of battery cells (2).

9. The battery module according to claim 1, wherein the at least one battery cell (2) includes a top surface having battery terminals and a bottom surface opposite the top surface, and wherein the compensation element (7) is on the bottom surface of the at least one battery cell (2).

10. The battery module according to claim 9, wherein the compensation element (7) covers the entire bottom surface of the at least one battery cell (2).

11. A method of operating a battery module (1) according to claim 1, the method comprising supplying to the Peltier element, with the voltage source (6), a voltage in such a way that the at least one battery cell (2) is heated or the at least one battery cell (2) is cooled.

12. A battery module having at least one lithium-ion battery cell (2), comprising a housing (3), in which the at least one battery cell (2) is accommodated, and a temperature-regulating element (4), wherein a Peltier element (5) is furthermore arranged between the at least one battery cell (2) and the temperature-regulating element (4), wherein the Peltier element is thermally conductively connected in each case to the at least one battery cell (2) and the temperature-regulating element (4), wherein the Peltier element is furthermore connected to a voltage source (6) in such a way that the Peltier element is configured to transfer heat between the at least one battery cell (2) and the temperature-regulating element (4), wherein a compensation element (7) for homogenizing the temperature, said compensation element being formed from a metallic material, is furthermore arranged between the at least one battery cell (2) and the Peltier element (5), and wherein the at least one battery cell (2) is cohesively connected to the compensation element (7) by a thermally conductive adhesive (10) which directly adheres to the at least one battery cell (2) and to the compensation element (7).

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) Exemplary embodiments of the invention are illustrated in the drawings and explained in greater detail in the following description.

(2) In the figures:

(3) FIG. 1 shows a first embodiment of a battery module according to the invention in a sectional view from the side,

(4) FIG. 2 shows a second embodiment of a battery module according to the invention in a sectional view from the side, and

(5) FIG. 3 shows an exemplary illustration of a temperature profile.

DETAILED DESCRIPTION

(6) FIG. 1 shows a first embodiment of a battery module 1 according to the invention in a sectional view from the side.

(7) In this case, the battery module 1 comprises at least one battery cell 2. In particular, the battery cell 2 in this case is formed as a lithium-ion battery cell 20. The battery module 1 preferably comprises a plurality of battery cells 2.

(8) The battery module 1 comprises a housing 3. In this case, the at least one battery cell 2 is accommodated in the housing 3.

(9) Furthermore, the battery module 1 comprises a temperature-regulating element 4. Preferably, in this case, the temperature-regulating element 4 is formed by the housing 3 of the battery module 1. In particular, in this case, the temperature-regulating element 4 is integrated into the housing 3 of the battery module 1. By way of example, the temperature-regulating element 4 can be formed such that a temperature-regulating liquid 400 is able to flow through it. In particular, for this purpose the temperature-regulating element 4 can be formed as a flow channel 40 formed such that a temperature-regulating liquid 400 is able to flow through it.

(10) Furthermore, a Peltier element 5 is arranged between the at least one battery cell 2 and the temperature-regulating element 4.

(11) The Peltier element 5 is thermally conductively connected to the at least one battery cell 2 and is furthermore thermally conductively connected to the temperature-regulating element 4.

(12) In this case, the Peltier element 5 is furthermore connected to a voltage source 6, such that heat transfer between the at least one battery cell 2 and the temperature-regulating element 4 is able to be formed by means of the Peltier element 5.

(13) In particular, for this purpose, on the one hand, heat can be transferred from the at least one battery cell 2 to the Peltier element 5 and can be transferred further from the Peltier element 5 to the temperature-regulating element 4.

(14) In particular, for this purpose, on the other hand, heat can be transferred from the temperature-regulating element 4 to the Peltier element 5 and can be transferred further from the Peltier element 5 to the at least one battery cell 2.

(15) In this case, on the one hand, as indicated in FIG. 1, the voltage source 6 can be formed as an external voltage source 60, which is connected to the Peltier element 5 in an electrically conductive manner and in terms of control engineering. In this case, the voltage source 6 can furthermore also comprise a control unit 600 configured to drive and also to control the voltage source 6.

(16) Furthermore, in this case, on the other hand, the voltage source 6 can also be formed by the at least one battery cell 2, which, for this purpose, is electrically conductively connected to the Peltier element 5 in such a way that an electric current provided by the at least one battery cell 2 can flow through the Peltier element 5.

(17) In this case, a compensation element 7 is furthermore arranged between the at least one battery cell 2 and the Peltier element 5, said compensation element being formed from a metallic material, such as, for example, aluminum, copper or nickel or mixtures thereof, and serving to homogenize the temperature.

(18) In particular, the compensation element 7 is formed from a material having comparably good thermal conductivity.

(19) Preferably, in this case, the at least one battery cell 2 is directly or cohesively connected to the compensation element 7.

(20) If the at least one battery cell 2 is cohesively connected to the compensation element 7, the cohesive connection between the at least one battery cell 2 and the compensation element 7 can preferably be formed by means of a thermally conductive adhesive 10.

(21) As can be discerned from FIG. 1, a thermal compensation material 8, in particular a first thermal compensation material 81, is preferably arranged between the at least one battery cell 2 and the compensation element 7.

(22) As can furthermore be discerned from FIG. 1, a thermal compensation material 8, in particular a second thermal compensation material 82, is preferably arranged between the compensation element 7 and the Peltier element 5.

(23) As can furthermore also be discerned from FIG. 1, a thermal compensation material 8, in particular a third thermal compensation material 83, is preferably arranged between the Peltier element 5 and the temperature-regulating element 4.

(24) The battery module 1 can then be used in such a way that the voltage source 6 supplies the Peltier element 5 with voltage in such a way that heating of the at least one battery cell 2 can be formed or that cooling of the at least one battery cell can be formed.

(25) FIG. 2 shows a second exemplary embodiment of a battery module 1 according to the invention in a sectional view.

(26) In this case, the second embodiment of the battery module 1 according to the invention as shown in FIG. 2 differs from the first embodiment of the battery module 1 as shown in FIG. 1 in that an electronic element 11 of the battery module, such as a DC/DC converter 12 or inverter 120, for example, is arranged at a side 110 of the temperature-regulating element 4 facing away from the at least one battery cell 2.

(27) To that end, the housing 3 of the battery module 1, by means of a connecting element 13, can be connected to the electronic element 11 of the battery module 1 or, as shown in FIG. 2, to a housing 14 accommodating the electronic element 11.

(28) Typically, heat is dissipated from electronic elements 11 of the battery module 1 at relatively high temperatures, such as 50° C. to 65° C., for example, with the result that heat dissipation of this type is possible by means of a battery module 1 according to the invention.

(29) FIG. 3 shows an exemplary illustration of a temperature profile.

(30) In this case, a spatial component is plotted against the temperature 21.

(31) Firstly, the temperature profile 22 within the at least one battery cell 2 can be discerned, wherein the temperature decreases from an interior of the at least one battery cell 2 to an exterior of the at least one battery cell 2.

(32) Afterward, the temperature profile 23 within the first thermal compensation material 81 can be discerned, wherein the temperature decreases in a direction facing away from the at least one battery cell 2.

(33) Afterward, the temperature profile 24 of the Peltier element 5 is shown, on the one hand, this temperature profile also decreasing in a direction facing away from the at least one battery cell 2.

(34) The temperature profile 25 within the temperature-regulating element 4 is shown, on the other hand, without the arrangement of a Peltier element 5.

(35) Afterward, the temperature profile 26 within the second thermal compensation material 82 can be discerned, wherein the temperature decreases in a direction facing away from the at least one battery cell 2.

(36) Furthermore, the temperature profile 27 within the temperature-regulating element 4 is shown with the arrangement of a Peltier element 5.

(37) The temperature difference 28 depicted corresponds here to the advantageous temperature reduction as a result of the arrangement of the Peltier element 5.