Water inlet connection structure, liquid cooling plate structure and battery module for this purpose

Abstract

Water inlet connection structure that can be snapped into a liquid cooling plate structure and serves to connect an external pipeline, comprising the following: a connecting body having at least one main diversion recess, several lateral diversion recesses and at least one sealing groove, wherein the main diversion recess is continuously connected to the top and bottom of the connecting body and the opening provided at one end of each lateral diversion recess is located on the circumferential side wall of the connecting body, while the opening provided at the other end is continuously connected to the main diversion recess, wherein the sealing groove is provided on the top of the connecting body and is formed in an annular shape around the main diversion recess; and at least one sealing ring arranged in the sealing groove.

Description

Field of invention

[0001] The present invention relates to a connection structure and in particular a water inlet connection structure suitable for a thin liquid cooling plate, a liquid cooling plate structure and a battery module therefor. State of the art

[0002] Under the dual pressure of pollution and energy scarcity, governments and major automakers worldwide have intensified their research and development efforts for electric vehicles, leading to rapid market growth. As one of the three main components of electric vehicles (batteries, motors, and electronic controls), high-performance batteries have garnered significant attention from governments and major automakers globally. Currently, lithium-ion batteries are considered a suitable energy source for electric vehicles. However, their high energy density also brings with it the problem of high heat generation. The high heat produced by lithium batteries can lead to a rapid temperature increase, posing significant challenges to both battery performance and electric vehicle safety.The lifespan and safety of lithium batteries largely depend on the actual operating temperature of the battery; therefore, a well-designed cooling system is crucial for lithium batteries.

[0003] Currently, the standard cooling method for high-performance lithium batteries is liquid cooling. Regarding heat dissipation in pouch cells, two types can be distinguished: direct contact conduction and indirect contact conduction. Indirect contact conduction is predominantly used in pouch cells on the market, while direct contact conduction is only employed in a few cases.

[0004] In indirect contact cooling, a heat transfer plate is used, which is brought into contact with the surface of the battery cell to conduct heat to the side surfaces, from where it is then dissipated by a liquid cooling device. In direct contact cooling, on the other hand, the heat from the battery cell is dissipated directly via a small liquid cooling plate that is in direct contact with the battery cell. While liquid cooling via indirect contact cooling has lower efficiency, larger temperature differences between the battery cells, and increases both the weight and cost of the battery system due to the additional heat transfer plate required, liquid cooling via direct contact cooling is technically more difficult to implement. Particularly with thin pouch cells and high-density stacking, there is no space available for connecting and linking cooling lines.While the liquid cooling system with direct contact lines, already used in electric vehicles, offers high efficiency in temperature management, the cooling lines not only require more space for the pipe connections, but the multi-layered structure is also complex. Furthermore, concerns exist regarding structural strength and leak tightness when using a plastic frame.

[0005] To remedy the above-mentioned defects known from the prior art, the present invention proposes a water inlet connection structure, a liquid cooling plate structure and a battery module for this purpose, which effectively solve the described problems. Object of the invention

[0006] The main object of the present invention is to provide a water inlet connection structure, a liquid cooling plate structure, and a battery module for this purpose. The direct docking function of the water inlet connection structure allows the liquid cooling plate to be used for direct contact cooling of pouch cells without the need for additional piping. This significantly reduces the distance between the battery cells, enabling the liquid cooling plate to achieve its maximum cooling capacity.

[0007] The present invention provides a water inlet connection structure suitable for use on a liquid cooling plate structure for connecting an external pipeline. The water inlet connection structure comprises a connection body, the connection body having at least one main diversion recess, several lateral diversion recesses, and a sealing groove. The main diversion recess is continuously connected to the top and bottom of the connection body. The opening of each lateral diversion recess at one end is located on the circumferential side wall of the connection body, while the opening at the other end is continuously connected to the main diversion recess. The sealing groove is provided on the top of the connection body and is annular around the main diversion recess, and at least one sealing ring is arranged in the sealing groove.

[0008] The present invention further provides a liquid cooling plate structure in which at least one liquid cooling channel is formed by the connection of two thin plates, and a cooling fluid is introduced into and discharged from the liquid cooling channel via a channel inlet and a channel outlet, each of which is continuously connected to the liquid cooling channel. The liquid cooling plate structure is attached to the channel inlet and / or the channel outlet by means of the water inlet connection structure, so that an external cooling fluid is received via the main diversion recess and introduced into the liquid cooling plate via the lateral diversion recesses. Alternatively, the cooling fluid located in the liquid cooling channel can be received through the lateral diversion recesses and then discharged vertically via the main diversion recess.

[0009] The present invention further provides a battery module comprising several battery cells, wherein the battery cells and the liquid cooling plate structures are stacked alternately on top of each other, the top of one water inlet connection structure and the bottom of the adjacent water inlet connection structure being directly docked to one another, so that a cooling fluid can flow through all the liquid cooling plate structures without the need for additional piping. In this way, both high energy density and high heat dissipation efficiency can be ensured.

[0010] To better understand the tasks, technical content, features and advantageous effects of the present invention, specific embodiments are described in detail below. Brief description of the drawings Fig. Figure 1A shows a perspective top view of the water inlet connection structure according to the invention; Fig. Figure 1B shows a perspective sectional view of the water inlet connection structure according to the invention; Fig. 1C shows a perspective bottom view of the water inlet connection structure according to the invention; Fig. Figure 2 shows a schematic view of the stacked and interlocking water inlet connection structures according to the present invention; Fig. Figure 3A shows a perspective exploded view of the water inlet connection structure before combination with the liquid cooling plate structure; Fig. Figure 3B shows a perspective partial top view of the water inlet connection structure after combination with the liquid cooling plate structure; Fig. Figure 3C shows a perspective partial underside view of the water inlet connection structure after combination with the liquid cooling plate structure; Fig. Figure 4 shows a schematic view of the liquid cooling plate structure according to the invention; Fig. Figure 5 shows a schematic view according to the present invention, in which two liquid cooling plate structures are stacked on top of each other; Fig. Figure 6 shows a schematic view according to the present invention, in which the liquid cooling plate structures and the battery cells are stacked on top of each other; Fig. Figure 7 shows a schematic perspective exploded view of the battery module according to the invention; Fig. Figure 8 shows a schematic view of another embodiment of the battery module according to the invention; Fig. Figure 9A shows a perspective top view of a further embodiment of the water inlet connection structure according to the invention; Fig. Figure 9B shows a perspective bottom view of a further embodiment of the water inlet connection structure according to the invention; Fig. Figure 10A shows a perspective top view of a further embodiment of the water inlet connection structure according to the invention; Fig. Figure 10B shows a perspective bottom view of a further embodiment of the water inlet connection structure according to the invention. Detailed description of the exemplary implementations

[0011] To better understand the advantages, nature, and features of the present invention, exemplary embodiments are described in detail below with reference to the accompanying drawings. The present invention is described with reference to certain exemplary embodiments and drawings; however, the invention is not limited to these, but only to the claims. These exemplary embodiments are provided solely to make the present disclosure more comprehensive and easier to understand.

[0012] The terminology used herein serves only to describe certain embodiments and is not intended to limit the general concept of the invention. As used herein, the singular forms "a," "an," "an," and "the" are to include the plural forms as well, unless the context clearly indicates otherwise. Unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning that a person skilled in the art in the field to which the embodiments belong would ascribe to them. Furthermore, it should be clarified that expressions, e.g.,Those terms that are defined in commonly used dictionaries are to be interpreted as having the meaning consistent with their meaning in the context of the relevant technology, and are not to be interpreted in an idealized or overly formal sense, unless expressly defined herein.

[0013] A reference in this entire specification to "a single embodiment" or "any embodiment" means that a function, structure, or feature described in connection with the embodiment is included in at least one embodiment of the present invention. Thus, the expressions "in a single embodiment" or "in any embodiment" at various points in this specification do not necessarily all refer to the same embodiment, but may refer to different embodiments. Furthermore, as a person with average technical knowledge of this disclosure can infer, the individual functions, structures, or features may be appropriately combined in one or more embodiments.

[0014] In describing the present invention, it should be noted that the terms "coupled," "connected," and "arranged" are to be understood broadly. For example, they may refer to a mechanical or electrical connection, or to an internal connection between two components, which may be connected directly or via an intermediate medium. The specific meanings of the above terms in the present invention will be clear to a person skilled in the art, depending on the specific situation.

[0015] It will be directed to the Fig. Reference is made to sections 1A to 1C. Fig. Figure 1A shows a perspective top view of the water inlet connection structure according to the invention; Fig. Figure 1B shows a perspective sectional view of the water inlet connection structure according to the invention; and Fig. Figure 1C shows a perspective bottom view of the water inlet connection structure according to the invention. The water inlet connection structure 1 according to the invention has a connection body 10, wherein the connection body 10 has at least one main diversion recess 13, several lateral diversion recesses 14 and a sealing groove 111, the main diversion recess 13 is continuously connected to the top 11 and the bottom 12 of the connection body 10 and the opening of each lateral diversion recess 14 provided at one end is located on the circumferential side wall 16 of the connection body 10, while the opening provided at the other end is continuously connected to the main diversion recess 13.As shown in the figures, the connecting body 10 is essentially cylindrical in shape, with the main diversion recess 13 extending axially through the top surface 11 and the bottom surface 12, forming a substantially circular cross-section. The radially extending lateral diversion recesses 14 are continuously connected to the main diversion recess 13 between the top surface 11 and the bottom surface 12. Thus, the main diversion recess 13 and the lateral diversion recesses 14 are substantially perpendicular to each other and are continuously connected. The coolant introduced through the opening of the main diversion recess 13 located on the top surface 11 can be introduced into the main diversion recess 13 and discharged both laterally through the lateral diversion recesses 14 and through the opening of the main diversion recess 13 located on the bottom surface 12.

[0016] It will be simultaneously on Fig. Reference is made to Figure 2, which shows a schematic view of the stacked and interlocking water inlet connection structures according to the present invention. When two water inlet connection structures 1 are stacked, the two adjacent water inlet connection structures 1 are connected to each other in such a way that the upper surface 11 rests directly against the lower surface 12. As shown in Figure 2, the two adjacent water inlet connection structures 1 are connected to each other such that the upper surface 11 rests directly against the lower surface 12. Fig. As shown in Figure 2, the upper surface 11 of the lower water inlet connection structure 1 rests directly against the lower surface 12 of the upper water inlet connection structure 1, so that the main diverting recesses 13 of the two water inlet connection structures 1 are directly docked to one another and continuously connected. The upper surface 11 has a sealing groove 111 for receiving a sealing ring 21, while the lower surface 12 is not recessed in the orthographic projection towards the sealing groove 111. Preferably, the lower surface 12 is designed as a completely flat surface. Thus, after the two water inlet connection structures 1 dock together, the lower surface 12 of the upper water inlet connection structure 1 rests against the upper surface 11 of the lower water inlet connection structure and additionally presses on the sealing ring 21 arranged in the sealing groove 111 of the upper surface 11, thereby achieving a sealing, watertight effect.The height of the sealing ring 21 is slightly greater than the depth of the sealing groove 111, thus ensuring a good seal and watertightness, and preventing coolant from escaping along the joint of the main diversion recesses 13 of the two water inlet connection structures 1. As shown in . Fig. 2 As shown by the arrows indicating the direction of flow of the coolant, the coolant introduced via the opening of the main diversion recess 13 provided on the upper side 11 of the upper water inlet connection structure 1 can be introduced into the main diversion recess 13 of the lower water inlet connection structure 1, further introduced into the main diversion recess 13 of the lower water inlet connection structure 1 and subsequently discharged laterally via the corresponding lateral diversion recesses 14 and via the opening of the main diversion recess 13 provided on the underside 12 of the lower water inlet connection structure 1.Conversely, the cooling fluid introduced via the lateral diversion recesses 14 of the two water inlet connection structures 1 can be successively introduced into the corresponding main diversion recesses 13, collected there, and then discharged from the main diversion recess 13 of the upper water inlet connection structure 1.

[0017] It will be directed to the Fig. Reference is made to 3A to 3C and 4. Fig. Figure 3A shows a perspective exploded view of the water inlet connection structure before combination with the liquid cooling plate structure; Fig. Figure 3B shows a perspective partial top view of the water inlet connection structure after combination with the liquid cooling plate structure; Fig. Figure 3C shows a perspective partial bottom view of the water inlet connection structure after combination with the liquid cooling plate structure; and Fig. Figure 4 shows a schematic view of the liquid cooling plate structure according to the invention. When the water inlet connection structure 1 is combined with the liquid cooling plate structure 30, the liquid cooling plate structure 30 has at least one liquid cooling channel 31. For example, the water inlet connection structure 1 is combined with the channel inlet 32, wherein the water inlet connection structure 1 can be inserted into the channel inlet 32. Depending on the material properties, for example, if both the water inlet connection structure 1 and the liquid cooling plate structure 30 are made of metal, the attachment to the channel inlet 32 ​​can be effected by welding or similar methods. To further reinforce the attachment with other liquid cooling plate structures 30, the circumference of the water inlet connection structure 1 can have several mounting holes 15.As shown in the figures, four mounting holes 15 extend through the circumference of the main diversion recess 13. The connection and fastening to an adjacent liquid cooling plate structure 30 will be described in detail in a later embodiment. Thus, the cooling fluid introduced via the opening 11 on the upper surface of the main diversion recess 13 can be introduced into the main diversion recess 13 and subsequently discharged laterally through the lateral diversion recesses 14, which are continuously connected to it.Since the water inlet connection structure 1 is recessed into the channel inlet 32 ​​of the liquid cooling plate structure 30 and the lateral diversion recesses 14 of the water inlet connection structure 1 are continuously connected to the liquid cooling channel 31 of the liquid cooling plate structure 30, the cooling fluid diverted from the lateral diversion recesses 14 can be introduced into the liquid cooling channel 31 via the channel inlet 32.

[0018] The liquid cooling plate structure 30 according to the invention is in the Fig. 4 and Fig. Figure 5 shows that in each liquid cooling plate structure 30, at least one liquid cooling channel 31 is formed by connecting two thin plates 301, 302. As shown in Fig. Figure 4 shows two exemplary liquid cooling channels 31. The front end of the liquid cooling channel 31 forms the channel inlet 32 ​​and the rear end the channel outlet 33. Naturally, the number, course, and shape of the liquid cooling channels 31 can be adapted or modified as needed. The figures serve only for illustration. The thin plates 301, 302 are preferably made of a metal with good thermal conductivity to enable rapid heat dissipation by means of the cooling fluid, although the invention is not limited to this. A previously described water inlet connection structure 1 can be integrated at the channel inlet 32 ​​and the channel outlet 33, respectively.Since a liquid cooling plate structure 30 is formed by connecting the two thin plates 301, 302, the water inlet connection structure 1 can be welded and fastened over the edges of its top 11 and bottom 12 to the lateral edges of the two thin plates 301, 302 in the area of ​​the channel inlet 32 ​​and the channel outlet 33, thereby firmly attaching the water inlet connection structure 1 to the channel inlet 32 ​​and the channel outlet 33.

[0019] As in Fig. As shown in Figure 5, the thin plates 301, 302 of the liquid cooling plate structure 30 each have an outward projection 301a, 302b in the area of ​​the channel inlet 32 ​​and the channel outlet 33, forming a receiving space 303 that is continuously connected to the liquid cooling channel 31. The projection 301a and the projection 302b each have a through-hole that is adapted to the shape of the water inlet connection structure 1 and allows its insertion or integration. In addition, the height of the receiving space 303 must be dimensioned at least such that the openings of the lateral diverting recesses 14 of the water inlet connection structure 1, which are provided on the circumferential side wall of the connection body, lie completely within the receiving space 303.This ensures that the coolant is retained exclusively between the projections 301a, 302b of the thin plates 301, 302 and does not leak at the junction between the water inlet connection structure 1 and the projections 301a, 302b. Fig. Figure 5 shows only the channel inlet 32 ​​for illustrative purposes; however, the channel outlet 33 has an identical structure, which is why a repeated description is omitted.

[0020] When two liquid cooling plate structures 30 are stacked, the water inlet connection structures 1 provided on each structure are directly adjacent to one another. This means that the upper surface 11 of the lower water inlet connection structure 1 rests directly against the lower surface 12 of the upper water inlet connection structure 1, so that the main diversion recesses 13 of the two structures are directly docked to one another and continuously connected. As previously described, a sealing groove 111 is provided on the upper surface 11 of the lower water inlet connection structure 1, in which a sealing ring 21 is arranged. This creates a watertight seal after the two water inlet connection structures 1 are docked to one another, preventing the cooling fluid from escaping along the joint of the main diversion recesses 13 of the two water inlet connection structures 1.The cooling fluid introduced via the opening of the main diversion recess 13 provided on the upper side 11 of the upper water inlet connection structure 1 can thus be introduced into the main diversion recess 13 of the upper water inlet connection structure 1, further introduced into the main diversion recess 13 of the lower water inlet connection structure 1 and subsequently introduced laterally via the corresponding lateral diversion recesses 14 into the liquid cooling channel 31 of the liquid cooling plate structure 30.

[0021] When stacking the battery cells 40, as in Fig. Figure 6 shows that two liquid cooling plate structures 30 can be clamped between several battery cells 40 to form a group. Buffer plates 50 (e.g., made of foam) can also be provided between the battery cells 40 for separation. With simultaneous reference to the Fig. 4 and Fig. As can be seen in Figure 5, each liquid cooling plate structure 30 has a greater thickness in the area of ​​the corresponding projection 301a, 302b than in the area of ​​the corresponding liquid cooling channel 31. Together with the height of each water inlet connection structure 1 housed in the corresponding receiving space 303, a receiving volume is created between the two liquid cooling plate structures 30 when they are stacked. This volume serves to accommodate a battery cell 40 and a buffer plate 50. In this way, the space between each pair of liquid cooling plate structures 30 is optimally utilized, further increasing the stacking density and thus the energy density.

[0022] It will be on Fig. Reference is made to Figure 7, which shows a schematic perspective exploded view of the battery module 70 according to the invention. The in Fig. Figure 7 illustrates a stacking method in which several battery cells 40 are clamped by liquid cooling plate structures 30, each having a water inlet connection structure 1, and stacked such that a buffer plate 50 is arranged between each pair of adjacent battery cells 40. Of course, it is also possible to combine a single liquid cooling plate structure 30 with only a single battery cell 40 if the battery cell 40 requires a higher heat dissipation effect. In this case, only a single battery cell 40 is clamped between two liquid cooling plate structures 30.After stacking, an additional water injection head 71 can be provided on the water inlet connection structure 1 of the uppermost liquid cooling plate structure 30. This water injection head has a downward-bent pipe connection 74, allowing the connection of a pipe for an external coolant. A mounting base 72 can be provided on the underside of the water inlet connection structure 1 of the lowermost liquid cooling plate structure 30, sealing the lowermost water inlet connection structure 1. The battery cells 40, the liquid cooling plate structures 30, and the like can be fastened together within the entire battery module 70 by means of a fastening element 73, which passes through the water injection head 71 and all mounting holes 15 of the stacked water inlet connection structures 1 and is attached to the mounting base 72.

[0023] Instead of the water injection head 71 having a downward-bent pipe connection 74, as in Fig. As shown in Figure 8, the pipe connection 74 located on the water injection head 71 can also be bent outwards so that it serves as a connection on both sides for introducing and removing a cooling fluid into the liquid cooling plate structure 30. Furthermore, in another embodiment of the present invention, reference is made to the Fig. 9A and Fig. Reference is made to 9B. Fig. Figure 9A shows a perspective top view of a further embodiment of the water inlet connection structure according to the invention; and Fig. Figure 9B shows a perspective bottom view of a further embodiment of the water inlet connection structure according to the invention. Instead of the main diversion recess 13 of the water inlet connection structure 1 being substantially circular in cross-section, it is also possible to design the main diversion recess 13 with a square cross-section, so that the entire water inlet connection structure 1 is rectangular in order to accommodate different spatial constraints of the battery module 70 or requirements for the flow rate of the coolant. Fig. Figure 10A shows a perspective top view of a further embodiment of the water inlet connection structure according to the invention; and Fig. Figure 10B shows a perspective bottom view of a further embodiment of the water inlet connection structure according to the invention. Alternatively, in a further specific embodiment of the present invention, as shown in the Fig. 10A and Fig. Figure 10B shows the mounting hole 15 of the water inlet connection structure 1 in the center and the main diversion recess 13 arranged annularly around the mounting hole 15. In this embodiment, the main diversion recess 13 is arranged circumferentially, which is why a double-layered sealing ring 21 is required to ensure watertightness after stacking. This embodiment also makes it possible to further reduce the volume of the water inlet connection structure 1 or to increase the cross-section of the main diversion recess 13 to allow for an increased flow rate of the cooling fluid.

[0024] In summary, the present invention provides a water inlet connection structure, a liquid cooling plate structure, and a battery module for this purpose, wherein adjacent water inlet connection structures are combined by docking their top and corresponding bottom surfaces together and secured by a fastening element. The arrangement of the main diversion recess and the lateral diversion recesses, in combination with the sealing ring, allows the liquid cooling plate structure to ensure a very high level of water tightness through direct docking of the water inlet connection structures. This eliminates the need for additional pipe connections, resulting in a battery module with good heat dissipation and high energy density. This enables direct contact and heat dissipation between the stacked battery cells, thus improving the efficiency of thermal management.

[0025] The foregoing description presents only preferred embodiments of the invention and is not intended to limit the scope of the claims. All equivalent changes and modifications that can be made by a person skilled in the art in this field according to the description and drawings of the invention are within the scope of protection of the present invention.

[0026] In summary, the present invention provides a water inlet connection structure, a liquid cooling plate structure, and a battery module for this purpose. The water inlet connection structure comprises a connection body, the connection body having a top, a bottom, a main diversion recess continuously connected to the top and bottom, and lateral diversion recesses, wherein the opening at one end of each lateral diversion recess is located on the circumferential side wall of the connection body, while the opening at the other end is continuously connected to the main diversion recess. The water inlet connection structure is directly embedded in a thin, plate-shaped liquid cooling plate, receives a cooling fluid via the main diversion recess, and directs it into the thin, plate-shaped liquid cooling plate via the lateral diversion recesses.The water inlet connection structure is axially stackable, allowing interconnected main diverting recesses to be formed for the flow of cooling fluid, thus solving the problem that the water inlet connections of conventional stacked thin, plate-shaped liquid cooling plates are difficult to connect to piping. Reference symbol list 1 Water inlet connection structure 10 connection bodies 11 Top 111 Sealing groove 12 Subpage 13 Main diversion exit 14 lateral diversion recesses 15 mounting holes 16 side wall 21 sealing ring 30 liquid cooling plate structure 301, 302 thin plate 301a, 302b advantage 303 Recording Room 31 Liquid cooling channel 32 Channel Inlet 33 Channel outlet 40 battery cells 50 buffer plate 70 battery module 71 Water injection head 72 mounting bases 73 Fastening element 74 Pipe connection

Claims

[1] Water inlet connection structure that can be snapped into a liquid cooling plate structure and serves to connect an external pipeline, comprising the following: a connecting body having at least one main diversion recess, several lateral diversion recesses and at least one sealing groove, wherein the main diversion recess is continuously connected to the top and bottom of the connecting body and the opening provided at one end of each lateral diversion recess is located on the circumferential side wall of the connecting body, while the opening provided at the other end is continuously connected to the main diversion recess, wherein the sealing groove is provided on the top of the connecting body and is formed in an annular shape around the main diversion recess; and at least one sealing ring that is arranged in the sealing groove. [2] Water inlet connection structure according to claim 1, wherein the connection body further comprises at least one mounting hole. [3] Water inlet connection structure according to claim 2, wherein the fastening hole is located on the outer circumference of the main diversion recess. [4] Water inlet connection structure according to claim 2, wherein the main diversion recess is located on the outer circumference of the mounting hole. [5] Water inlet connection structure according to claim 1, wherein the main diversion recess has a circular or square cross-section. [6] Water inlet connection structure according to claim 1, wherein the underside of the connection body is not recessed in the orthographic projection towards the sealing groove. [7] Liquid cooling plate structure in which at least one liquid cooling channel is formed by the connection of two thin plates and a cooling liquid is introduced into and discharged from the liquid cooling channel via a channel inlet and a channel outlet, each of which are continuously connected to the liquid cooling channel, characterized by , that the liquid cooling plate structure comprises a water inlet connection structure according to claim 1, which is attached to the channel inlet and / or the channel outlet for introducing or discharging the cooling liquid, wherein the channel inlet and / or the channel outlet are continuously connected to the lateral diversion recesses of the main diversion recess. [8] Liquid cooling plate structure according to claim 7, wherein a projection is provided on the thin plates in the area of ​​the channel inlet and the channel outlet, whereby a receiving space continuously connected to the liquid cooling channel is formed for receiving the water inlet connection structure, wherein the openings of the lateral diversion recesses provided on the circumferential side wall of the connection body are completely within the receiving space. [9] Battery module comprising: at least two liquid cooling plate structures, wherein in each liquid cooling plate structure at least one liquid cooling channel is formed by the connection of two thin plates and a cooling liquid is introduced into or discharged from the liquid cooling channel via a channel inlet and a channel outlet, which are each continuously connected to the liquid cooling channel. characterized by, that the liquid cooling plate structure comprises a water inlet connection structure according to claim 1, which is attached to the channel inlet and / or the channel outlet for introducing or discharging the cooling liquid, wherein the channel inlet and / or the channel outlet are continuously connected to the lateral diversion recesses of the main diversion recess; and at least one battery cell that is clamped between the two liquid cooling plate structures. [10] Battery module according to claim 9, wherein the water inlet connection structures are stacked coaxially on top of each other and are in contact with each other, such that the top of one connection body is in contact with the bottom of the adjacent connection body. [11] Battery module according to claim 10, wherein the underside of a terminal body rests against the sealing ring located on the top side of the adjacent terminal body. [12] Battery module according to claim 11, wherein the terminal body further has at least one mounting hole, so that a fastening element is inserted through the mounting holes of the terminal bodies of the liquid cooling plate structures for fastening. [13] Battery module according to claim 9, wherein the underside of the bottom liquid cooling plate structure is provided with a mounting base to seal the water inlet connection structure of the bottom liquid cooling plate structure. [14] Battery module according to claim 9, wherein the top surface of the uppermost liquid cooling plate structure has a water injection head with a pipe connection for the introduction and discharge of the cooling liquid. [15] Battery module according to claim 9, in which a projection is provided on the thin plates in the area of ​​the channel inlet and the channel outlet, whereby a receiving space continuously connected to the liquid cooling channel is formed for receiving the water inlet connection structure, wherein the openings of the lateral diversion recesses provided on the circumferential side wall of the connection body are completely within the receiving space.

Images