Battery module with heat transfer arrangement

Abstract

Battery module with heat transfer arrangement, which includes: a hollow housing comprising a first side wall, a second side wall, a third side wall, and a fourth side wall, wherein the first side wall is arranged opposite the third side wall, and the second side wall is arranged opposite the fourth side wall, and wherein the first side wall has a first opening, and the third side wall has a second opening; a large number of battery cells stacked and arranged within the inner surface of the hollow casing; and a heat transfer arrangement for transferring the heat generated by the battery cells, the heat transfer arrangement comprising: a first heat transfer plate arranged on an outside of the first side wall, the first heat transfer plate comprising a first liquid inlet, a first liquid outlet and a first conduit formed in an inside of the first heat transfer plate, and the first conduit being connected to the first liquid inlet and the first liquid outlet; a second heat transfer plate arranged on an outside of the second side wall and / or the fourth side wall, wherein the second heat transfer plate comprises a second liquid inlet, a second liquid outlet and a second conduit formed in an inside of the second heat transfer plate, and the second conduit is connected to the second liquid inlet and the second liquid outlet; a multitude of support elements arranged between the battery cells to form at least one flow channel between the battery cells; a first heat transfer fluid that flows sequentially through the first opening, the at least one flow channel and the second opening to flow within the hollow casing and transfer heat generated by the battery cells; and a second heat transfer fluid that flows within the first and second conduits to transfer heat generated by the battery cells.

Description

AREA OF INVENTION

[0001] The present application relates to a battery module with a heat transfer arrangement, in particular a battery module comprising a composite heat transfer structure formed by battery cells immersed in a heat transfer fluid and a heat transfer plate arranged on an outside of the battery cells. BACKGROUND OF THE INVENTION

[0002] In state-of-the-art methods, two typical solutions for heat transfer techniques in battery packs can be distinguished. One of these solutions involves placing a heat transfer plate horizontally beneath the battery pack, while the battery cells are typically arranged vertically. However, with the advancement of battery technology, the size of the battery cells has gradually increased (at least 200 mm x 500 mm). Due to strict space constraints regarding the height of the battery pack, the battery cells are no longer arranged vertically and must be stacked horizontally. This phenomenon occurs more frequently in current battery pack designs, particularly in large battery modules.For horizontal stacking, if the heat transfer plate remains horizontally positioned beneath the battery pack, the usable height of the battery cells is severely restricted, leading to a reduction in the overall capacity of the battery pack. Additionally, this structural design impairs the cooling effect. The temperature difference between the upper and lower battery cells within the battery pack becomes more significant. This considerably increased temperature difference will directly impact the operating efficiency and lifespan of the battery cells.

[0003] Another existing heat transfer technology for battery packs involves immersing the battery pack directly in a heat transfer fluid. This technology effectively solves the problem of excessive temperature differences between the battery cells. The uniformity of heat dissipation for the battery pack immersed in the heat transfer fluid allows each cell within the pack to operate under the same cooling conditions, thus improving the stability and performance of the battery module. However, with the gradual increase in battery cell size, when battery modules are stacked horizontally, some areas far from the inlet and outlet of the heat transfer fluid will develop flow dead zones.In flow dead zones, the flow of the heat transfer fluid is reduced, preventing timely heat dissipation. Heat accumulating in these dead zones significantly decreases heat dissipation efficiency. For horizontally stacked battery modules, flow dead zones typically occur at the outer boundaries of the battery pack. This means that battery cells near the outer edges do not achieve the same heat transfer effect as those located on the inside of the pack, negatively impacting the overall module's operational efficiency and heat dissipation performance.

[0004] Conventional heat transfer technologies for battery packs, considering the continuously increasing size of battery cells and limitations imposed by space constraints and the height of the battery pack, not only restrict the stacking height of the battery cells but also result in uneven cooling, leading in particular to excessive temperature differences between the upper and lower cells within the battery pack. While immersing the battery pack in a heat transfer fluid addresses the problem of temperature differences between individual cells, the uneven flow of the heat transfer fluid, especially the dead zones formed at the boundaries of the battery pack, reduces the overall heat dissipation efficiency.As the size of battery cells continues to increase, the question of how to overcome these technical challenges to achieve higher efficiency and more uniform cooling remains a pressing problem in this field. SUMMARY OF THE INVENTION

[0005] One objective of this utility model is to provide a battery module with a heat transfer arrangement consisting of a heat transfer fluid that fills the spaces between the battery cells and a heat transfer plate attached to the outer boundary. The flow of the heat transfer fluid ensures uniformity among the battery cells, while improving the overall heat transfer efficiency of the battery module and maximizing the battery's energy density within a limited volume.

[0006] To achieve the aforementioned objective, the present application provides a battery module with a heat transfer arrangement, wherein the battery module comprises a hollow housing, a plurality of battery cells, and a heat transfer arrangement. The hollow housing comprises a first side wall, a second side wall, a third side wall, and a fourth side wall, the first side wall being arranged opposite the third side wall, and the second side wall being opposite the fourth side wall. The first side wall includes a first opening, and the third side wall includes a second opening, wherein the battery cells are stacked and arranged in an inner area of ​​the hollow housing. The heat transfer arrangement is used to perform heat transfer for the battery cells and comprises a first heat transfer plate.which is arranged on the outside of the first side wall and comprises a first liquid inlet, a first liquid outlet, and a first conduit formed in an inside of the first heat transfer plate and connected to the first liquid inlet and the first liquid outlet; a second heat transfer plate arranged on an outside of the second side wall and / or the fourth side wall, and comprising a second liquid inlet, a second liquid outlet, and a second conduit formed in an inside of the second heat transfer plate and connected to the second liquid inlet and the second liquid outlet; a plurality of support elements arranged between the battery cells to form at least one flow channel between the battery cells; a first heat transfer fluid, which passes successively through the first opening,A heat transfer fluid flows through at least one flow channel and the second opening, and within the hollow housing to transfer heat generated by the battery cells; and a second heat transfer fluid flows within the first channel and the second channel to transfer heat generated by the multitude of battery cells. This structure improves the overall heat transfer efficiency of the battery module and makes it possible to maximize the battery's energy density within a limited volume through the overall design of the battery module.

[0007] In one embodiment of the present application, the hollow housing comprises two general electrode output terminals, each of which is electrically connected to the plurality of battery cells.

[0008] In one embodiment of the present application, the first heat transfer fluid is a liquid selected from a group consisting of water, ethylene glycol solution, propylene glycol solution, mineral oil and fluorinated liquid.

[0009] In one embodiment of the present application, the second heat transfer fluid is a liquid selected from a group consisting of water, ethylene glycol solution, propylene glycol solution, mineral oil and fluorinated liquid.

[0010] In one embodiment of the present application, a further first heat transfer plate is arranged on an outside of the third side wall.

[0011] In one embodiment of the present application, a further second heat transfer plate is arranged on an outside of the fourth side wall or the second side wall.

[0012] In one embodiment of the present application, the heat transfer arrangement also comprises a first heat transfer element arranged between the first heat transfer plate and the hollow housing.

[0013] In one embodiment of the present application, the heat transfer arrangement further comprises a second heat transfer element which is arranged between the second heat transfer plate and the hollow housing.

[0014] An embodiment of the present application further comprises a side cover that covers the first heat transfer plate, and the side cover comprises a first connecting hole, a second connecting hole and a third connecting hole, wherein the first connecting hole is connected to the first opening, and the second and third connecting holes are each connected to the first liquid inlet and the first liquid outlet.

[0015] In one embodiment of the present application, the first opening and the second opening each comprise a plurality of sub-openings, the sub-openings each corresponding to the at least one flow channel.

[0016] In one embodiment of the present application, the support elements are arranged offset in adjacent rows and adjacent columns. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1A: a structural schematic representation in exploded view according to an embodiment of the present application. Fig. 1B: a structural schematic representation in exploded view according to another embodiment of the present application. Fig. 1C: a structural schematic representation in exploded view according to another embodiment of the present application. Fig. 2A to 2B: schematic representations of the fluid paths according to an embodiment of the present application. Fig. 3: a structural schematic representation of the electrodes according to another embodiment of the present application. Fig. 4: a structural schematic representation of the heat transfer component according to another embodiment of the present application. Fig. 5A to 5B: structural schematic representations of the side cover according to an embodiment of the present application. DETAILED DESCRIPTION OF THE INVENTION

[0017] In light of the prior art problems described above, the present application provides a battery module with a heat transfer arrangement. The battery module comprises a hollow housing combined with a heat transfer arrangement. A plurality of battery cells are stacked and arranged in an inner surface of the hollow housing. The heat transfer arrangement comprises a plurality of support elements arranged between the battery cells, allowing a first heat transfer fluid to flow between them. The heat transfer arrangement further comprises a first heat transfer plate and a second heat transfer plate, arranged correspondingly on an outer surface of the hollow housing, allowing a second heat transfer fluid to flow in an inner surface of the first and second heat transfer plates.This combination of two heat transfer methods improves the overall heat dissipation efficiency of the battery cells, which can solve the problems of uneven heat transfer and flow dead zones in the prior art.

[0018] It will be on Fig. Reference is made to Figure 1A, which is a structural schematic in exploded view according to an embodiment of the present application, showing an implementation view in which a battery cell has a conductive handle (not shown in the figure) arranged on one side of the same. As shown in the figure, this embodiment is a battery module 1 with a heat transfer arrangement, wherein the battery module 1 comprises a hollow housing 12, a plurality of battery cells 14 and a heat transfer arrangement 20.

[0019] It will be revisited Fig. Reference is made to Figure 1A. As shown in the figure, in this embodiment the hollow housing 12 comprises a first side wall 12a, a second side wall 12b, a third side wall 12c, and a fourth side wall 12d. The first side wall 12a and the third side wall 12c are arranged opposite each other and are opposite the battery cells 14, and the second side wall 12b and the fourth side wall 12d are arranged opposite each other and are opposite the battery cells 14. The battery cells 14 are thus stacked and arranged in an inner area of ​​the hollow housing 12. The first side wall 12a includes a first opening 122, and the third side wall 12c includes a second opening 124.

[0020] It is also politely requested Fig. Referenced in Figure 2A. The heat transfer arrangement 20 serves to transfer the heat generated by the battery cells 14. The heat transfer arrangement 20 includes a first heat transfer plate 22, a second heat transfer plate 24, a plurality of support elements 16, a first heat transfer fluid L1, and a second heat transfer fluid L2. The support elements 16 are arranged between the battery cells 14, which are adjacent to one another. That is to say, except for the top of the uppermost battery cell 14 and the bottom of the lowermost battery cell 14, the support elements 16 are arranged between each pair of adjacent battery cells 14. As shown in Figure 2A. Fig. As shown in Figure 1A, the support elements 16 are arranged in a staggered manner for the arrangement of adjacent rows and columns, meaning that the support elements 16 are staggered in adjacent rows and columns. For example, as shown in the figure, the support elements 16 are arranged in a row of 3 or 4 consecutively, but this is not limited to this. The support elements 16 can also be arranged in a matrix. The material of the support elements 16 can be block foams with electrically insulating properties, but this is not limited to this. Any electrically insulating material can be used for the support elements 16.The support elements 16 create at least one gap between adjacent battery cells 14 to form at least one flow channel 17 between the battery cells 14, with each flow channel 17 being formed between each pair of adjacent battery cells 14, as shown by way of example (as in . Fig. (2A shown). The at least one flow channel 17 allows the first heat transfer fluid L1 to flow through it. A first heat transfer plate 22 is arranged on an outer surface of the first side wall 12a. The first heat transfer plate 22 includes a first liquid inlet 222, a first liquid outlet 224, and a first conduit 226, which is formed in an inner surface of the first heat transfer plate 22 and is connected to the first liquid inlet 222 and the first liquid outlet 224. Both the first liquid inlet 222 and the first liquid outlet 224 are arranged on an outer surface of the first heat transfer plate 22. A second heat transfer plate 24 is arranged on an outer surface of the second side wall 12b.The second heat transfer plate 24 comprises a second liquid inlet 242 and a second liquid outlet 244, which are arranged opposite each other on the outside of the second heat transfer plate 24. A second conduit 246 is formed in an inner surface of the second heat transfer plate 24 and is connected to the second liquid inlet 242 and the second liquid outlet 244. In this embodiment, the second heat transfer fluid L2 can flow into the first liquid inlet 222 to enter the first conduit 226 in the inner surface of the first heat transfer plate 22, and into the second liquid inlet 242 to enter the second conduit 246 in the inner surface of the second heat transfer plate 24, and flow out of the first liquid outlet 224 and the second liquid outlet 244, respectively.This means that the first line 226 and the second line 246 are not connected to each other and allow the second heat transfer fluid L2 to flow through each of them, so that the first heat transfer plate 22 and the second heat transfer plate 24 each transfer heat generated by the battery cells 14.

[0021] In this embodiment, the first opening 122 and the second opening 124 of the hollow housing 12 are each arranged on the first side walls 12a and the third side walls 12c of the hollow housing 12, which are arranged opposite each other, so that the first heat transfer fluid L1 flows successively through the first opening 122, the at least one flow channel 17 and the second opening 124 in the inside of the hollow housing 12 to transfer heat generated by the battery cells 14.

[0022] Continuing the foregoing, in this embodiment the first side wall 12a and the third side wall 12c of the hollow housing 12 can be metal support frames, wherein the first side wall 12a can support the first heat transfer plate 22.

[0023] It will be on Fig. 1A and Fig. 1C is referred to together. Fig. Figure 1C is a structural schematic representation of an exploded view of an embodiment of the present application. The battery cells 14 are equipped with conductive handles (not shown) on opposite sides of the X-axis. As shown in Fig. Figure 1A shows an embodiment in which the battery cell 14 has a conductive handle (not shown) on one side. The first opening 122 includes a plurality of first lower openings 122a arranged on the first side wall 12a. In the embodiment shown in Fig. In the embodiment shown in Figure 1C, the second opening 124 has a plurality of second lower openings 124a arranged on the third side wall 12c. The first lower openings 122a and second lower openings 124a correspond to the at least one flow channel 17, meaning that the first lower openings 122a and the second lower openings 124a each correspond to the spaces created by the support elements 16 arranged between two adjacent battery cells 14. As shown in Figure 1C, the second opening 124 has a plurality of second lower openings 124a arranged on the third side wall 12c. The first lower openings 122a and the second lower openings 124a correspond to the spaces created by the support elements 16 arranged between two adjacent battery cells 14. Fig. 1A and Fig. As shown in Figure 1C, eight spaces between the battery cells 14 are formed by the support elements 16 and correspond to two rows of eight first lower openings 122a and eight second lower openings 124a, which allows the first heat transfer fluid L1 to flow directly into the spaces between the battery cells 14 and the support elements 16.

[0024] In another embodiment, referring to Fig. 1B, a further first heat transfer plate 22 is symmetrically attached and arranged on an outside of the third side wall 12c of the hollow housing 12, wherein this is in Fig. 1B is shown as a further first heat transfer plate 22'. In the same way, a further second heat transfer plate 24 can also be symmetrically attached and arranged on an outer side of the fourth side wall 12d of the hollow housing 12, wherein this is in Fig. 1B is shown as a further second heat transfer plate 24'. The conduits of the first heat transfer plate 22, the second heat transfer plate 24, the further first heat transfer plate 22' and the further second heat transfer plate 24' are not connected to each other, and each of their conduits carries a flow of the second heat transfer fluid L2, such that the second heat transfer fluid L2 flowing in the first heat transfer plate 22, the second heat transfer plate 24, the further first heat transfer plate 22' and the further second heat transfer plate 24' each transfers heat generated by the battery cells 14, thereby improving the thermal conductivity and the overall heat dissipation efficiency.The material of the outer casings of the first heat transfer plates 22, 22' and the second heat transfer plates 24, 24' can be metal, but is not limited to it; any material with higher thermal conductivity for heat dissipation can be used for the outer casings of the first heat transfer plates 22, 22' and the second heat transfer plates 24, 24'.

[0025] It will be revisited Fig. 1B and Fig. Reference is made to 2A to 2B, whereby Fig. Figures 2A to 2B are schematic representations of the fluid path of the heat transfer fluid in an embodiment of the present application. As shown in Fig. As shown in Figure 2A, the hollow housing 12 is filled with a first heat transfer fluid L1. The first heat transfer fluid L1 flows inside the hollow housing 12 and between the battery cells 14. The first heat transfer fluid L1 enters the hollow housing 12 through the first opening 122 and flows through the at least one flow channel 17, which is created between the battery cells 14 by the support elements 16, and flows out of the hollow housing 12 through the second opening 124. That is, the first heat transfer fluid L1 flows inside the hollow housing 12 from the first opening 122 to the second opening 124.In addition, the support elements 16 are arranged in an offset manner in adjacent rows and adjacent columns, which allows the first heat transfer fluid L1 to flow completely between the battery cells 14 and to carry away the heat generated by the battery cells 14.

[0026] Next, we will look at Fig. Reference is made to Figure 2B, wherein the interiors of the first heat transfer plate 22 and the second heat transfer plate 24 are filled with a second heat transfer fluid L2. Specifically, the second heat transfer fluid L2 is arranged within the first channel 226 of the first heat transfer plate 22 and the second channel 246 of the second heat transfer plate 24. The second heat transfer fluid L2 enters the first channel 226 on the interior of the first heat transfer plate 22 through the first fluid inlet 222 and flows out of the first channel 226 through the first fluid outlet 224; another second heat transfer fluid L2 enters the second channel 246 on the interior of the second heat transfer plate 24 through the second fluid inlet 242, flows through the second channel 246, and flows out of the second channel 246 through the second fluid outlet 244.

[0027] In this embodiment, the first heat transfer fluid L1 can be, but is not limited to, a liquid selected from the group consisting of water, ethylene glycol solution, propylene glycol solution, mineral oil, and fluorinated liquid; any other solution with high thermal conductivity can be used as the first heat transfer fluid L1 in this embodiment. The second heat transfer fluid L2 can be, but is not limited to, a liquid selected from the group consisting of water, ethylene glycol solution, propylene glycol solution, mineral oil, and fluorinated liquid; any other solution with high thermal conductivity can be used as the second heat transfer fluid L2 in this embodiment.

[0028] It will be on Fig. Reference is made to Figure 3, which is a schematic representation of the electrodes according to another embodiment of the present application. In this embodiment, each battery cell 14 has a conductive handle extending from a single side (not shown in the figure). The first side wall 12a of the hollow housing 12 includes two general electrode output terminals 18. The two general electrode output terminals 18 are each electrically connected to the positive and negative terminals of the battery cell 14 to serve as connection points for the battery cell 14 for power output. Furthermore, after the first heat transfer plate 22 is fixedly attached to the first side wall 12a, the first opening 122 is partially exposed to allow the first heat transfer fluid L1 to enter the at least one flow channel 17.

[0029] It will be on Fig. Reference is made to Figure 4, which is a structural schematic representation of the heat transfer component according to another embodiment of the present application. In this embodiment, a first heat-conducting component 26 is arranged between the first heat transfer plate 22 and the first side wall 12a of the hollow housing 12 to improve the heat conduction efficiency. The material of the first heat-conducting component 26 is an elastic material that provides a damping function to prevent the first heat transfer plate 22 from colliding with the housing 12 due to vibrations during vehicle movement. Similarly, a further first heat-conducting component 26' can also be arranged between the first heat transfer plate 22' and the third side wall 12c of the hollow housing 12.It should be noted that, in order to allow the entry of the first heat transfer fluid L1 into the flow channel 17, the width of the first heat conducting component 26 may be equal to or slightly less than the width of the first heat transfer plate 22, so that the first heat conducting component 26 and the first heat transfer plate 22 are successively attached to the first side wall 12a, and the first opening 122 is partially exposed.

[0030] Furthermore, as in Fig. As shown in Figure 4, a second heat transfer element 28 can also be arranged between the second heat transfer plate 24 and the second side wall 12b of the hollow housing 12. Similarly, a further second heat transfer element (not shown in the figure) can be arranged between the second heat transfer plate 24' and the fourth side wall 12d of the hollow housing 12. In these embodiments, the materials of the first heat transfer element 26 and the second heat transfer element 28 are thermally conductive materials, such as soft metals.

[0031] It will be on Fig.Reference is made to Figures 5A to 5B, which are schematic representations of the side cover of a further embodiment of the present application. This embodiment further includes a side cover 30, which is arranged on one side of the hollow housing 12 and covers the first heat transfer plate 22. The side cover 30 includes a first connecting hole 32, a second connecting hole 32', and a third connecting hole 32'', each corresponding to the first opening 122 of the hollow housing 12, the first fluid inlet 222, and the first fluid outlet 224 of the first heat transfer plate 22, respectively. The first connecting hole 32 is connected to the first opening 122 of the hollow housing 12 to allow the first heat transfer fluid L1 to enter the hollow housing 12.The second connecting hole 32' and the third connecting hole 32'' are each connected to the first fluid inlet 222 and the first fluid outlet 224 of the first heat transfer plate 22, respectively, to allow the inlet and outlet of the second heat transfer fluid L2. Similarly, the side cover 30 can be arranged symmetrically on the other side of the hollow housing 12, sealing the third side wall 12c within the hollow housing 12 and covering the first heat transfer plate 22' (not shown in the figure).

[0032] In summary, the present application provides a battery module with a heat transfer component. The battery module includes a first heat transfer fluid that flows in an inner area of ​​a hollow housing and between battery cells, and a first heat transfer plate and a second heat transfer plate arranged on the outer surface of the hollow housing and filled with a second heat transfer fluid. The first heat transfer fluid flows in an inner area of ​​the hollow housing to ensure temperature uniformity of the battery cells, while the second heat transfer fluid circulates in the first and second heat transfer plates arranged on the outer surface of the hollow housing.The use of two heat dissipation systems improves the overall heat transfer efficiency of the battery module, thereby solving the problems of excessive temperature differences between the upper and lower battery cells caused by uneven heat conduction in conventional battery module structures, and a reduction in overall heat dissipation performance due to dead water zones caused by uneven flow of the heat transfer fluid.

[0033] The present application thus provides a battery module with a heat transfer arrangement, wherein the battery module comprises a hollow housing, a plurality of battery cells, and the heat transfer arrangement. The hollow housing has first and second openings. The battery cells are arranged in an inner surface of the hollow housing. The heat transfer arrangement comprises a first heat transfer plate located on an outer surface of a first side wall of the hollow housing, and a second heat transfer plate located on an outer surface of a second side wall and / or a fourth side wall of the hollow housing. The battery cells include a plurality of intermediate support elements to form at least one flow channel between them.A first heat transfer fluid flows through the first opening, the at least one flow channel, and the second opening, while a second heat transfer fluid flows within the first and second heat transfer plates. This combination of two heat transfer methods improves the overall heat dissipation efficiency of the battery cells.

Claims

[1] Battery module with heat transfer arrangement comprising: a hollow housing comprising a first side wall, a second side wall, a third side wall, and a fourth side wall, wherein the first side wall is arranged opposite the third side wall, and the second side wall is arranged opposite the fourth side wall, and wherein the first side wall has a first opening, and the third side wall has a second opening; a large number of battery cells stacked and arranged within the inner surface of the hollow casing; and a heat transfer arrangement for transferring the heat generated by the battery cells, the heat transfer arrangement comprising: a first heat transfer plate arranged on an outside of the first side wall, the first heat transfer plate comprising a first liquid inlet, a first liquid outlet and a first conduit formed in an inside of the first heat transfer plate, and the first conduit being connected to the first liquid inlet and the first liquid outlet; a second heat transfer plate arranged on an outside of the second side wall and / or the fourth side wall, wherein the second heat transfer plate comprises a second liquid inlet, a second liquid outlet and a second conduit formed in an inside of the second heat transfer plate, and the second conduit is connected to the second liquid inlet and the second liquid outlet; a multitude of support elements arranged between the battery cells to form at least one flow channel between the battery cells; a first heat transfer fluid that flows sequentially through the first opening, the at least one flow channel and the second opening to flow within the hollow casing and transfer heat generated by the battery cells; and a second heat transfer fluid that flows within the first and second conduits to transfer heat generated by the battery cells. [2] Battery module with heat transfer arrangement according to claim 1, wherein the hollow housing comprises two general electrode output terminals, each of which is electrically connected to the battery cells. [3] Battery module with heat transfer arrangement according to claim 1, wherein the first heat transfer fluid is a liquid selected from the group consisting of water, ethylene glycol solution, propylene glycol solution, mineral oil and fluorinated liquid. [4] Battery module with heat transfer arrangement according to claim 1, wherein the second heat transfer fluid is a liquid selected from the group consisting of water, ethylene glycol solution, propylene glycol solution, mineral oil and fluorinated liquid. [5] Battery module with heat transfer arrangement according to claim 1, wherein the heat transfer arrangement further comprises a further first heat transfer plate arranged on an outside of the third side wall. [6] Battery module with heat transfer arrangement according to claim 1, wherein the heat transfer arrangement further comprises a second heat transfer plate arranged on an outside of the fourth side wall or the second side wall. [7] Battery module with heat transfer arrangement according to claim 1, wherein the heat transfer arrangement further comprises a first heat transfer element arranged between the first heat transfer plate and the hollow housing. [8] Battery module with heat transfer arrangement according to claim 1, wherein the heat transfer arrangement further comprises a second heat transfer element arranged between the second heat transfer plate and the hollow housing. [9] Battery module with heat transfer arrangement according to claim 1, which further comprises: a side cover covering the first heat transfer plate, the side cover having a first connection hole, a second connection hole and a third connection hole, the first connection hole being connected to the first opening, and the second and third connection holes being connected to the first liquid inlet and the first liquid outlet respectively. [10] Battery module with heat transfer arrangement according to claim 1, wherein the first opening and the second opening each have a plurality of lower openings, each lower opening corresponding to the at least one flow channel. [11] Battery module with heat transfer arrangement according to claim 1, in which the support elements are arranged offset in adjacent rows and adjacent columns.

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