Battery module and vehicle containing the battery module

Abstract

Battery module (100) comprising a battery module housing (101) and a first battery cell (102), wherein the first battery cell (102) is arranged in the battery module housing (101), wherein a graphite foil (104) is arranged in a cavity (103) between the first battery cell (102) and a first wall (105) of the battery module housing (101), wherein a first section of the graphite foil (104) bears against the first battery cell (102) and a second section of the graphite foil (104) is spaced from the first battery cell (102), wherein the second section of the graphite foil (104) bears against the first wall (105), characterized in that a third filling element (107) is arranged on a second wall (106) of the battery module (100) between the first battery cell (102) and the second wall (106), and in that the graphite foil (104) is arranged between the second Wall (106) and the third filling element (107) are arranged without contact with the first battery cell (102).

Description

[0001] The invention relates to a battery module according to the preamble of claim 1 and a vehicle comprising the battery module.

[0002] DE 10 2020 005 581 A1 already discloses a battery module according to the preamble of claim 1. EP 3 611 779 A1 discloses a battery with a battery cell module and a cooling device, wherein the battery cell module and the cooling device each have, on the mutually facing sides, a carrier plate with a plurality of film rolls arranged side by side and spaced from one another. The film rolls of the cooling device each engage in the spaces between the film rolls of the battery cell module, wherein a film with a meandering shape runs between the film rolls.

[0003] The battery module according to the independent claim comprises a battery module housing and a first battery cell, wherein the first battery cell is arranged in the battery module housing, wherein a graphite foil is arranged in a cavity between the first battery cell and a first wall of the battery module housing, wherein a first section of the graphite foil rests against the first battery cell and a second section of the graphite foil is spaced from the first battery cell, wherein the second section of the graphite foil rests against the first wall. The graphite foil absorbs heat and releases it via the first wall, i.e. via a first path. A third filler element is arranged on a second wall of the battery module between the first battery cell and the second wall, wherein the graphite foil is arranged between the second wall and the third filler element without contact with the first battery cell.The graphite foil absorbs heat at a contact surface with the battery cells and dissipates it through the second wall, i.e., via a second path. This provides additional cooling for the battery cells.

[0004] The battery module preferably comprises a plurality of battery cells, wherein the battery cells are arranged in the battery module housing, wherein the graphite foil is arranged in a cavity between the battery cells and the first wall of the battery module housing, wherein the graphite foil alternately bears against one of the battery cells and the first wall. The battery cells are additionally cooled via the first path.

[0005] In one embodiment, a first filler element is arranged in the cavity, which is designed to press the first section of the graphite foil against the first battery cell, and a second filler element is arranged in the cavity, which is designed to press the second section of the graphite foil against the first wall. This enables good heat transfer in the sections.

[0006] In one embodiment, the first filler element is designed to press the graphite foil against the first battery cell and a second battery cell. The graphite foil is pressed against adjacent battery cells by a filler element.

[0007] The graphite foil is preferably arranged between the first section and the second section, particularly in a gap between the first filler element and the second filler element. This represents a particularly compact design.

[0008] In one embodiment, the first filler element has a cross-section for filling a first cavity, while the second filler element has a cross-section for filling a second cavity, wherein the first cavity is larger than the second cavity. As a result, the graphite foil fits snugly, particularly in rounded corners of the battery module housing.

[0009] Preferably, a filling element arranged and configured to press the graphite foil against at least one of the battery cells and a filling element arranged and configured to press the graphite foil against the first wall are alternately provided in the cavity. This arrangement of, in particular, rod-shaped filling elements is easy to manufacture.

[0010] In one embodiment, the contact area of ​​the graphite foil with the first battery cell is smaller than the contact area of ​​the graphite foil with the first wall or the second wall. This means that the area for dissipating heat is larger than the area for absorbing it. This ensures reliable cooling.

[0011] A vehicle comprising the battery module may be provided.

[0012] Further advantageous embodiments can be found in the following description and the drawing. The drawing shows: Fig. 1 a schematic representation of a battery module, Fig. 2 a schematic representation of a part of a section through the battery module, Fig. 3 a schematic representation of a section of the cut.

[0013] In Fig. Figure 1 schematically shows a battery module 100. The battery module 100 is, for example, part of a vehicle.

[0014] The battery module 100 comprises a battery module housing 101 and battery cells 102.

[0015] The battery cells 102 are arranged in the battery module housing 101. In the example, essentially cuboid-shaped battery cells with a rectangular base area and a narrow and a wide side surface are provided, which are arranged next to one another in such a way that the wide side surfaces of adjacent battery cells are arranged opposite one another.

[0016] In Fig. 2 is a schematic representation of a part of a section through the battery module 100.

[0017] A graphite foil 104 is arranged in a cavity 103 between the battery cells 102 and a first wall 105 of the battery module housing 101.

[0018] The graphite foil 104 has first sections, each of which abuts one of the battery cells 102. The graphite foil 104 has second sections in the cavity 103, which are spaced apart from the battery cells 102. The second sections abut the first wall 105.

[0019] The graphite foil 104 is arranged in the cavity 103 between the battery cells 102 and the first wall 105 of the battery module housing 101 such that the graphite foil 104 alternately rests against one of the battery cells 102 and the first wall 105.

[0020] In the example, first filling elements 107 are arranged in the cavity 103, each of which is designed to press a first section of the graphite foil 104 against the first battery cell 102. Second filling elements 107 are arranged in the cavity 103, each of which is designed to press a second section against the first wall 105.

[0021] In the example, the first filling elements 107 are designed to press the graphite foil 104 onto two battery cells 102 that are immediately adjacent to one another.

[0022] In the example, the graphite foil 104 is arranged between a first section and a second section, between a first filling element 107 and a second filling element 107.

[0023] In the example, the graphite foil 104 is arranged in a respective gap 108 between two immediately adjacent filling elements 107.

[0024] In the example, a filling element 107, which is arranged and designed to press the graphite foil 104 against at least one of the battery cells 102, and a filling element 107, which is arranged and designed to press the graphite foil 104 against the first wall 105, are provided alternately in the cavity 103.

[0025] A filler element 107 is arranged on the second wall 106 of the battery module 100 between the first battery cell 102 and the second wall 106. The graphite foil 104 is arranged between the second wall 106 and this filler element 107, making no contact with the first battery cell 102.

[0026] In one embodiment, a contact area of ​​the graphite foil 104 with the respective battery cells 102 is smaller than a contact area of ​​the graphite foil 104 with the first wall 105.

[0027] In one embodiment, a contact area of ​​the graphite foil 104 with the respective battery cells 102 is smaller than a contact area of ​​the graphite foil 104 with the second wall 106.

[0028] The contact surfaces can also be designed in other ratios, in particular with contact surfaces of equal size or in reverse proportion.

[0029] Preferably, the graphite foil lines the second wall 106 substantially completely, ie the contact area of ​​the graphite foil 104 is substantially as large as the second wall 106.

[0030] In Fig. 3 shows a section of the section schematically.

[0031] In the example, the battery module housing 101 has a rounded corner 110.

[0032] The filling elements 107 have a cross-section for filling a first cavity, in the example the cavity 103.

[0033] The filling element 107 arranged in the rounded corner 110 has a cross-section for filling a second cavity 111. The first cavity is larger than the second cavity 111.

[0034] In the example, the graphite foil 104 is guided with contact to the rounded corner 110 of the battery module housing 101. An arrangement along the battery cell in the rounded corner 110 is also possible.

Claims

[1] Battery module (100) comprising a battery module housing (101) and a first battery cell (102), wherein the first battery cell (102) is arranged in the battery module housing (101), wherein a graphite foil (104) is arranged in a cavity (103) between the first battery cell (102) and a first wall (105) of the battery module housing (101), wherein a first portion of the graphite foil (104) rests against the first battery cell (102) and a second portion of the graphite foil (104) is spaced from the first battery cell (102), wherein the second portion of the graphite foil (104) rests against the first wall (105), characterized by that a third filling element (107) is arranged on a second wall (106) of the battery module (100) between the first battery cell (102) and the second wall (106), and that the graphite foil (104) is arranged between the second wall (106) and the third filling element (107) without contact with the first battery cell (102). [2] Battery module (100) according to claim 1, characterized by in that the battery module (100) comprises a plurality of battery cells (102), wherein the battery cells (102) are arranged in the battery module housing (101), wherein the graphite foil (104) is arranged in a cavity (103) between the battery cells (102) and the first wall (105) of the battery module housing (101), wherein the graphite foil (104) alternately rests against one of the battery cells (102) and the first wall (105). [3] Battery module (100) according to claim 1 or 2, characterized by in that a first filling element (107) is arranged in the cavity (103), which is designed to press the first section of the graphite foil (104) against the first battery cell (102), wherein a second filling element (107) is arranged in the cavity (103), which is designed to press the second section of the graphite foil (104) against the first wall (105). [4] Battery module (100) according to claim 3, characterized bythat the first filling element (107) is designed to press the graphite foil (104) onto the first battery cell (102) and onto a second battery cell (102). [5] Battery module (100) according to claim 3 or 4, characterized by that the graphite foil (104) is arranged between the first section and the second section between the first filling element (107) and the second filling element (107), in particular in a gap (108). [6] Battery module (100) according to claim 3 to 5, characterized by in that the first filling element (107) has a cross-section for filling a first cavity (103), wherein the second filling element (107) has a cross-section for filling a second cavity (111), wherein the first cavity (103) is larger than the second cavity (111). [7] Battery module (100) according to one of the preceding claims, characterized bythat in the cavity (103) there are alternately provided a filling element (107) which is arranged and designed to press the graphite foil (104) against at least one of the battery cells (102), and a filling element (107) which is arranged and designed to press the graphite foil (104) against the first wall (105). [8] Battery module (100) according to claim 7, characterized by that a contact area of ​​the graphite foil (104) with the first battery cell (102) is smaller than a contact area of ​​the graphite foil (104) with the first wall (105) or the second wall (106). [9] Vehicle, characterized by that the vehicle comprises the battery module (100) according to one of claims 1 to 8.

Images