Water injection port joint structure, liquid cooling plate structure and battery module thereof

Abstract

The utility model provides a kind of water injection port joint structure, liquid cooling plate structure and its battery module, its water injection port joint structure includes joint body, joint body has upper surface, lower surface, the main flow channel being communicated with the upper surface and the lower surface, and the lateral flow channel with one end opening located surrounding side wall, the other end opening is communicated to the main flow channel, this water injection joint structure is directly buried in thin plate type liquid cooling plate, cooling liquid is received by main flow channel, and cooling liquid is flowed into thin plate type liquid cooling plate by lateral flow channel, and water injection port joint structure can be axially stacked, and the main flow channel of forming communication is made to make cooling liquid flow, solve the problem that the water injection port joint of the prior art stacked thin plate type liquid cooling plate is difficult to connect with pipeline.

Description

Technical Field

[0001] This utility model relates to a connector structure, and more particularly to a water inlet connector structure suitable for thin liquid cooling plates, a liquid cooling plate structure, and a battery module thereof. Background Technology

[0002] Under the dual pressures of environmental pollution and energy shortages, governments and major automakers worldwide have increased their research and development efforts in electric vehicles, leading to the booming development of the electric vehicle market. As one of the three main components of an electric vehicle (battery, motor, and electronic control system), the power battery has also received widespread attention from governments and major automakers. Lithium-ion batteries are currently considered a suitable power source for electric vehicles. However, the pursuit of high energy density also brings the problem of high heat generation. The high heat generated by lithium batteries causes a sharp rise in temperature, posing a significant challenge to battery performance and the safety of electric vehicles. The cycle life and safety of lithium batteries largely depend on the actual operating temperature of the battery; therefore, designing a reasonable lithium battery cooling system is crucial.

[0003] Currently, the mainstream cooling method for high-power lithium batteries is liquid cooling. For pouch batteries, cooling methods can be divided into direct contact conduction and indirect contact conduction. Most pouch batteries on the market use indirect contact conduction for liquid cooling, with only a small portion using direct contact conduction.

[0004] Indirect contact conduction primarily utilizes a heat-conducting plate in contact with the cell surface to conduct heat from the cell to the sides, where it is then dissipated by a liquid cooling system. Direct contact conduction, on the other hand, involves a small liquid cooling plate directly contacting the cell to remove heat directly. Although indirect contact conduction has lower liquid cooling efficiency, a larger battery temperature difference, and increases overall battery weight and cost due to the need for additional heat-conducting plates, direct contact conduction liquid cooling is technically more difficult to overcome, especially for thin pouch batteries. Furthermore, in high-density stacking, there is often insufficient space for connecting and configuring cooling pipes. Currently, direct contact conduction liquid cooling, already used in electric vehicles, offers high efficiency in temperature management. However, its cooling pipes require significant space for connections, and the multi-layered structure is complex. Additionally, the use of a plastic frame raises concerns about structural strength and sealing. Utility Model Content

[0005] The main purpose of this utility model is to provide a water inlet connector structure, a liquid cooling plate structure and its battery module. By utilizing the direct docking characteristic of the water inlet connector structure, the liquid cooling plate can be used for direct contact soft-pack battery cooling. Without the need for additional pipe connections, the distance between the cells can be greatly reduced, thus maximizing the cooling efficiency of the liquid cooling plate.

[0006] This utility model provides a water inlet connector structure, embedded in a liquid cooling plate structure, for connecting an external pipeline. The water inlet connector structure includes: a connector body, which includes at least one main flow channel, multiple lateral flow channels, and at least one waterproof groove. The main flow channel connects an upper surface and a lower surface of the connector body. One end of the lateral flow channel is located on the surrounding side wall of the connector body, and the other end is connected to the main flow channel. The waterproof groove is disposed on the upper surface of the connector body and surrounds the main flow channel. The waterproof groove is disposed in the waterproof groove.

[0007] Preferably, the connector body also includes at least one fixing hole.

[0008] Preferably, the fixing hole is located on the periphery of the main flow channel.

[0009] Preferably, the main flow channel is located around the fixing hole.

[0010] Preferably, the main flow channel has a circular or square cross-section.

[0011] Preferably, the lower surface of the connector body is provided without a groove at the orthographic projection position of the waterproof trench.

[0012] This invention also proposes a liquid-cooled plate structure, which utilizes two thin plates joined together to form at least one liquid-cooled flow channel. A flow channel inlet and outlet connected to the liquid-cooled flow channel allow coolant to flow into or out of the channel. The liquid-cooled plate structure has an embedded water inlet connector structure for connecting an external pipeline. The water inlet connector structure includes: a connector body comprising at least one main flow channel, multiple lateral flow channels, and at least one waterproof groove. The main flow channel is connected to the connector body. The connector body comprises an upper surface and a lower surface. One end of the lateral flow guide groove is located on the surrounding sidewall of the connector body, and the other end is connected to the main flow channel. The waterproof groove is disposed on the upper surface of the connector body and surrounds the main flow channel. At least one sealing gasket is disposed in the waterproof groove. The water inlet connector structure is installed at the flow channel inlet and / or flow channel outlet to guide the inflow or outflow of the coolant, wherein the flow channel inlet and / or flow channel outlet are connected to the lateral flow guide groove of the main flow channel. Preferably, the thin plate has an outwardly protrusion at both the flow channel inlet and the flow channel outlet to form a receiving space communicating with the liquid cooling flow channel, for the water inlet connector structure to be embedded, and ensuring that the one end opening of the lateral flow guide groove located on the surrounding sidewall of the connector body is completely within the receiving space.

[0013] This utility model further proposes a battery module comprising: at least two liquid cooling plate structures, each liquid cooling plate structure utilizing two thin plates joined together to form at least one liquid cooling channel, and utilizing a channel inlet and a channel outlet connected to the liquid cooling channel for the inflow or outflow of coolant; characterized in that each liquid cooling plate structure has a water inlet connector structure embedded thereon for connecting to an external pipeline, the water inlet connector structure comprising: a connector body, which includes at least one main flow channel, multiple lateral flow channels, and at least one waterproof groove, the main flow channel being connected to one of the connector bodies. The upper and lower surfaces include a lateral guide channel with one end opening located on the surrounding sidewall of the connector body and the other end opening connected to the main guide channel. The waterproof groove is provided on the upper surface of the connector body and surrounds the main guide channel. At least one sealing gasket is provided in the waterproof groove. The water inlet connector structure is installed at the flow channel inlet and / or the flow channel outlet to guide the inflow or outflow of the coolant, wherein the flow channel inlet and / or the flow channel outlet are connected to the lateral guide channel. At least one battery cell is sandwiched between the two liquid cooling plate structures.

[0014] Preferably, the water inlet connector structure is stacked on top of each other along the same axis, so that the upper surface of the connector body abuts against the lower surface of the adjacent connector body.

[0015] Preferably, the lower surface of the connector body abuts against and contacts the sealing gasket on the upper surface of the adjacent connector body.

[0016] Preferably, the connector body also includes at least one fixing hole for a fastener to pass through the fixing hole of the connector body of the liquid cooling plate structure for fixation.

[0017] Preferably, the bottom of the lowest liquid cooling plate structure includes a fixed base that can seal the bottom of the water inlet connector structure of the lowest liquid cooling plate structure.

[0018] Preferably, the top of the uppermost liquid-cooled plate structure includes a water inlet head with a pipe connector to guide the coolant in or out.

[0019] Preferably, the thin plate has a protrusion at both the inlet and outlet of the flow channel to form a receiving space communicating with the liquid cooling flow channel, so that the water inlet connector structure can be embedded and the opening of the side guide channel located on the surrounding side wall of the connector body is completely located in the receiving space.

[0020] The following detailed description through specific embodiments will make it easier to understand the purpose, technical content, features and effects achieved by this utility model. Attached Figure Description

[0021] Figure 1A This is a three-dimensional top view of the water inlet connector structure of this utility model.

[0022] Figure 1B This is a three-dimensional cross-sectional view of the water inlet connector structure of this utility model.

[0023] Figure 1C This is a three-dimensional bottom view of the water inlet connector structure of this utility model.

[0024] Figure 2 This is a schematic diagram of the stacked connection of the water inlet connector structure of this utility model.

[0025] Figure 3A This is an exploded 3D view of the water inlet connector structure before it is combined with the liquid cooling plate structure.

[0026] Figure 3B This is a partial three-dimensional top view of the combined structure of the water inlet connector and the liquid cooling plate.

[0027] Figure 3C This is a partial three-dimensional bottom view of the combined structure of the water inlet connector and the liquid cooling plate.

[0028] Figure 4 This is a schematic diagram of the liquid cooling plate structure of this utility model.

[0029] Figure 5 This is a schematic diagram of the stack of two liquid-cooled plates according to this utility model.

[0030] Figure 6 This is a schematic diagram of the liquid cooling plate structure and battery cell stack of this utility model.

[0031] Figure 7 This is a three-dimensional exploded view of the liquid battery module of this utility model.

[0032] Figure 8 This is a schematic diagram of another embodiment of the liquid battery module of this utility model.

[0033] Figure 9A This is a three-dimensional top view of another embodiment of the water inlet connector structure of this utility model.

[0034] Figure 9B This is a perspective bottom view of another embodiment of the water inlet connector structure of this utility model.

[0035] Figure 10A This is a three-dimensional top view of another embodiment of the water inlet connector structure of this utility model.

[0036] Figure 10B This is a perspective bottom view of another embodiment of the water inlet connector structure of this utility model.

[0037] Figure Labels 1. Water Inlet Connector Structure 10 Connector Body 11 Upper surface 111 Waterproof Trench 12 Lower Surface 13 main flow channels 14 side guide channels 15 fixing holes 16 sidewalls 21 Sealing gasket 30 Liquid Cooling Plate Structure 301 and 302 thin plates 301a, 302b protrusions 303 storage space 31 Liquid Cooling Channel 32-channel inlet 33 Flow Channel Outlet 40 battery cells 50 buffer plate 70 battery module 71 water injection heads 72 Fixed Base 73 Fasteners 74 Pipe fittings. Detailed Implementation

[0038] To make the advantages, spirit, and features of this utility model more readily apparent, detailed descriptions and discussions will follow with reference to the embodiments and accompanying drawings. It should be noted that these embodiments are merely representative examples of this utility model and are not intended to limit the scope of implementation or protection of this utility model. The purpose of providing these embodiments is solely to make the disclosure of this utility model more thorough and easier to understand.

[0039] The terminology used in the various embodiments disclosed herein is for the purpose of describing particular embodiments only and is not intended to limit the various embodiments disclosed herein. Unless explicitly indicated otherwise, the singular forms used also include the plural forms. Unless otherwise specified, all terms used in this specification (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which the various embodiments disclosed herein pertain. The foregoing terms (such as those defined in a general dictionary) are to be interpreted as having the same meaning as in the context of the same technical field and are not to be interpreted as having an idealized or overly formal meaning unless explicitly defined in the various embodiments disclosed herein.

[0040] In the description of this specification, references to terms such as "an embodiment" or "a specific embodiment" mean that a specific feature, structure, material, or characteristic described in connection with that embodiment is included in at least one embodiment of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments.

[0041] In the description of this utility model, unless otherwise specified or limited, it should be noted that the terms "coupled", "connected" and "set up" should be interpreted broadly. For example, they can refer to mechanical or electrical connections, or internal connections between two components. They can be directly connected or connected through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0042] For the water inlet connector structure 1 disclosed in this utility model, please refer to [link / reference needed]. Figures 1A-1C As shown, where, Figure 1A This is a three-dimensional top view of the water inlet connector structure. Figure 1B This is a three-dimensional cross-sectional view of the water inlet connector structure. Figure 1C This is a three-dimensional bottom view of the water inlet connector structure. The water inlet connector structure 1 of this utility model has a connector body 10, which has at least one main flow channel 13, multiple lateral flow channels 14, and a waterproof groove 111. The main flow channel 13 connects the upper surface 11 and the lower surface 12 of the connector body 10. One end of each lateral flow channel 14 is located on the surrounding sidewall 16 of the connector body 10, and the other end connects to the main flow channel 13. As shown in the figure, the connector body 10 is roughly cylindrical in shape, and a through-hole is formed along the axial direction of the cylinder, penetrating the upper surface 11 and the lower surface 12. The main flow channel 13 on surface 12 also has a roughly circular cross-section, and the radial lateral flow channel 14 formed between the upper surface 11 and the lower surface 12 is connected to the main flow channel 13; therefore, the main flow channel 13 and the lateral flow channel 14 are roughly perpendicular, and the main flow channel 13 and the lateral flow channel 14 are interconnected. The coolant flowing in from the opening of the main flow channel 13 on the upper surface 11 can enter the main flow channel 13, flow out laterally from the lateral flow channel 14, and flow out from the opening of the main flow channel 13 on the lower surface 12.

[0043] Please refer to the following for further details. Figure 2 , Figure 2 This is a schematic diagram of a stacked water inlet connector structure. When two water inlet connector structures 1 are stacked, adjacent water inlet connector structures 1 are joined by the upper surface 11 directly contacting the lower surface 12, as shown below. Figure 2As shown in the diagram, the lower water inlet connector structure 1 directly abuts its upper surface 11 against the lower surface 12 of the upper water inlet connector structure 1, allowing the main flow channels 13 of the two water inlet connector structures 1 to directly connect and communicate. The upper surface 11 has a waterproof groove 111 on its top surface for placing the sealing gasket 21, while the lower surface 12, corresponding to the orthographic projection of the waterproof groove 111, is not grooved; preferably, the lower surface 12 is a completely flat design. Therefore, after the two water inlet connector structures 1 are connected, the lower surface 12 of the upper water inlet connector structure 1 abuts against the upper surface 11 of the lower water inlet connector structure 1, and further against the sealing gasket 21 located in the waterproof groove 111 of the upper surface 11 to achieve a sealing and waterproof effect. Therefore, the height of the sealing gasket 21 is slightly higher than the depth of the waterproof groove 111, ensuring a good sealing and waterproof effect, that is, ensuring that the coolant does not leak along the joint of the main flow channels 13 of the two water inlet connector structures 1. Therefore, as... Figure 2 As indicated by the arrows, which represent the flow direction of the coolant, the coolant flowing in from the opening of the main flow channel 13 on the upper surface 11 of the upper water inlet connector structure 1 can enter the main flow channel 13 of the upper water inlet connector structure 1 and flow into the main flow channel 13 of the lower water inlet connector structure 1, and then flow out laterally from their respective side flow channels 14 and from the opening of the main flow channel 13 on the lower surface 12 of the lower water inlet connector structure 1. Conversely, the coolant flowing in from the side flow channels 14 of the two water inlet connector structures 1 can also sequentially enter their corresponding main flow channels 13 for collection, and then flow out from the main flow channel 13 of the upper water inlet connector structure 1.

[0044] Please refer to the following for further details. Figures 3A-3C and Figure 4 ,in, Figure 3A This is an exploded 3D view of the water inlet connector structure before it is combined with the liquid cooling plate structure. Figure 3B This is a partial three-dimensional top view of the combined structure of the water inlet connector and the liquid cooling plate. Figure 3C This is a partial three-dimensional bottom view of the combined structure of the water inlet connector and the liquid cooling plate. Figure 4This is a schematic diagram of an embodiment of a liquid-cooled plate incorporating the water inlet connector structure of this utility model. When the water inlet connector structure 1 is combined with the liquid-cooled plate structure 30, the liquid-cooled plate structure 30 has at least one liquid-cooled flow channel 31. Taking the water inlet connector structure 1 combined with the flow channel inlet 32 ​​as an example, the water inlet connector structure 1 can be embedded in the flow channel inlet 32. Depending on the material, for example, when both the water inlet connector structure 1 and the liquid-cooled plate structure 30 are made of metal, they can be fixed to the flow channel inlet 32 ​​by welding or other methods. In order to further strengthen the subsequent combination and fixation with other liquid-cooled plate structures 30, the water inlet connector structure 1 can have multiple fixing holes 15 around it. As shown in the figure, there are four through fixing holes 15 arranged around the main flow channel 13. The connection and fixation with adjacent liquid-cooled plate structures 30 will be described in detail in the following embodiments. Therefore, the coolant flowing in through the opening of the main flow channel 13 on the upper surface 11 can enter the main flow channel 13 and flow out laterally through the connected side flow channel 14. Since the water inlet connector structure 1 is embedded in the flow channel inlet 32 ​​of the liquid cooling plate structure 30 and the side flow channel 14 of the water inlet connector structure 1 is connected to the liquid cooling flow channel 31 of the liquid cooling plate structure 30, the coolant flowing out through the side flow channel 14 can flow into the liquid cooling flow channel 31 through the flow channel inlet 32.

[0045] The liquid-cooled plate structure 30 disclosed in this utility model, such as Figure 4-5 As illustrated, each liquid cooling plate structure 30 utilizes two thin plates 301, 302 joined together to form at least one liquid cooling channel 31, such as... Figure 4 As shown in the figure, two liquid cooling channels 31 are formed, with the front end of the liquid cooling channel 31 being the channel inlet 32 ​​and the end end being the channel outlet 33. Of course, the number, route configuration, and type of the liquid cooling channels 31 can be adjusted or changed as needed. The figure is only for illustration. In addition, the material of the thin plates 301 and 302 is preferably a metal with good thermal conductivity to facilitate the rapid heat dissipation of the coolant, but this utility model is not limited to this. The channel inlet 32 ​​and the channel outlet 33 can be respectively embedded with the aforementioned water inlet connector structure 1. Since the liquid cooling plate structure 30 is formed by the mutual connection of two thin plates 301 and 302, the water inlet connector structure 1 can be fixed to the channel inlet 32 ​​and the channel outlet 33 by welding the edges of the upper surface 11 and the lower surface 12 to the side edges of the two thin plates 301 and 302 located at the channel inlet 32 ​​and the channel outlet 33.

[0046] like Figure 5As illustrated, the thin plates 301 and 302 of the liquid cooling plate structure 30 each have an outwardly formed protrusion 301a and 302b at the flow channel inlet 32 ​​and flow channel outlet 33, respectively, to form a receiving space 303 communicating with the liquid cooling flow channel 31. In addition, the protrusions 301a and 302b have a perforation corresponding to the shape of the water inlet connector structure 1 for embedding or embedding the water inlet connector structure 1. Furthermore, the height of the receiving space 303 must be at least sufficient to completely cover one end opening of the side guide groove 14 of the water inlet connector structure 1 located on the surrounding side wall of the connector body within the receiving space 303, so that the coolant can be confined between the protrusions 301a and 302b of the thin plates 301 and 302, and will not leak from the water inlet connector structure 1 and the joint of the protrusions 301a and 302b. Figure 5 The diagram only shows the flow channel inlet 32 ​​for illustration; the structure at the flow channel outlet 33 is the same, so it will not be repeated here.

[0047] When the two liquid cooling plate structures 30 are stacked, the water inlet connector structures 1 provided on the two liquid cooling plate structures 30 will abut against each other. That is, in the same axial direction, the upper surface 11 of the lower water inlet connector structure 1 directly abuts against the lower surface 12 of the upper water inlet connector structure 1, so that the main flow channels 13 of the two water inlet connector structures 1 can be directly connected and communicated. As mentioned above, the waterproof groove 111 on the upper surface 11 of the lower water inlet connector structure 1, through the sealing gasket 21 placed therein, can achieve a waterproof effect after the two water inlet connector structures 1 are connected, that is, the coolant will not leak along the joint of the main flow channels 13 of the two water inlet connector structures 1. Therefore, the coolant flowing in from the opening of the main flow channel 13 on the upper surface 11 of the upper water inlet connector structure 1 can enter the main flow channel 13 of the upper water inlet connector structure 1 and flow into the main flow channel 13 of the lower water inlet connector structure 1, and then flow laterally into the liquid cooling channel 31 of the liquid cooling plate structure 30 through the corresponding side flow channel 14.

[0048] Therefore, when using the 40-cell stack, please refer to [link / reference]. Figure 6 Multiple battery cells 40 can be sandwiched between two liquid-cooled plate structures 30 to form a group, and the battery cells 40 can be further separated by buffer plates 50 (such as foam material). See also... Figure 4 as well as Figure 5 Because the thickness of the liquid cooling plate structure 30 formed by the protrusions 301a and 302b is thicker than that of the liquid cooling channel 31 area, and furthermore, it can be matched with the height of the water inlet connector structure 1 set in the accommodating space 303, so that when the two liquid cooling plate structures 30 are stacked, an accommodating space can be formed between the two liquid cooling plate structures 30 for the battery cell 40 and the buffer plate 50 to be set, making full use of the space between the two liquid cooling plate structures 30, thereby increasing their stacking density and further increasing their energy density.

[0049] like Figure 7 As shown, it is a three-dimensional exploded view of the battery module 70 of this utility model. Figure 7 The architecture shows that multiple battery cells 40 are sandwiched in a liquid cooling plate structure 30 with a water inlet connector structure 1, and a buffer plate 50 is provided between adjacent battery cells 40. However, if the battery cells 40 need to have a higher heat dissipation effect, it is also possible that a single liquid cooling plate structure 30 is configured with only a single battery cell 40, that is, only a single battery cell 40 is sandwiched in two liquid cooling plate structures 30. A water inlet head 71 can be added to the water inlet connector structure 1 of the topmost liquid cooling plate structure 30 after stacking. It has a downwardly bent pipe connector 74, through which the external coolant pipe can be connected. A fixing base 72 can be added to the bottom of the water inlet connector structure 1 of the bottommost liquid cooling plate structure 30 to seal the bottommost water inlet connector structure 1. The fixing member 73 can pass through the fixing holes 15 on the water inlet head 71 and all the stacked water inlet connector structures 1 and be fixed to the fixing base 72, so that the battery cells 40 and the liquid cooling plate structure 30 in the entire battery module 70 are fixed to each other.

[0050] On the other hand, in addition to the aforementioned water injection head 71 having a downwardly bent pipe joint 74, such as Figure 8 As shown, the pipe joint 74 on the water inlet head 71 can also be bent outwards to allow connection on both sides, guiding the coolant into and out of the liquid cooling plate structure 30. Furthermore, in another specific embodiment of this utility model, please refer to... Figure 9A as well as Figure 9B ,in, Figure 9A This is a three-dimensional top view of the water inlet connector structure. Figure 9B This is a three-dimensional bottom view of the water inlet connector structure. Besides the aforementioned water inlet connector structure 1 having a roughly circular cross-section for the main flow channel 13, the main flow channel 13 can also be configured with a square cross-section, making the overall water inlet connector structure 1 rectangular, to accommodate different space constraints of the battery module 70 or coolant flow requirements; or in another specific embodiment of this utility model, such as... Figure 10A as well as Figure 10B As shown, where, Figure 10A This is a three-dimensional top view of the water inlet connector structure. Figure 10BThis is a three-dimensional bottom view of the water inlet connector structure. The fixing hole 15 of the water inlet connector structure 1 is located in the center, while the main flow channel 13 is arranged in a ring around the fixing hole 15. In this embodiment, because the main flow channel 13 is arranged in a ring, it is necessary to have inner and outer double-layer sealing gaskets 21 to ensure the waterproof performance after stacking. In this embodiment, the volume of the water inlet connector structure 1 can be further reduced, or the cross-sectional area of ​​the main flow channel 13 can be increased to increase the flow rate of coolant.

[0051] In summary, this utility model proposes a water inlet connector structure, a liquid cooling plate structure, and a battery module thereof. Adjacent water inlet connector structures can be joined top-to-bottom with fasteners. Combined with the lateral water outlet configuration of the main flow channel and side flow channel, and the use of sealing gaskets, the liquid cooling plate structure, after direct connection via the water inlet connector structure, achieves high waterproof performance. This eliminates the need for additional piping connections, resulting in a battery module with excellent heat dissipation and energy density. Furthermore, it enables stacked heat dissipation through direct contact conduction of the battery cells, improving thermal management efficiency.

Claims

1. A water inlet connector structure, characterized in that, Embedded in a liquid-cooled plate structure, allowing connection to an external pipeline, the water inlet connector structure includes: A connector body includes at least one main flow channel, a plurality of lateral flow channels and at least one waterproof groove. The main flow channel connects an upper surface and a lower surface of the connector body. One end of the lateral flow channel is located on the surrounding sidewall of the connector body, and the other end is connected to the main flow channel. The waterproof groove is disposed on the upper surface of the connector body and surrounds the main flow channel. as well as At least one sealing gasket is provided in the waterproof trench.

2. The water inlet connector structure according to claim 1, characterized in that, The connector body also includes at least one fixing hole.

3. The water inlet connector structure according to claim 2, characterized in that, The fixing hole is located on the periphery of the main flow channel.

4. The water inlet connector structure according to claim 2, characterized in that, The main flow channel is located around the fixing hole.

5. The water inlet connector structure according to claim 1, characterized in that, The main flow channel has a circular or square cross-section.

6. The water inlet connector structure according to claim 1, characterized in that, The lower surface of the connector body is without grooves, corresponding to the orthographic projection of the waterproof trench.

7. A liquid-cooled plate structure, characterized in that, At least one liquid cooling channel is formed by joining two thin plates together, and a coolant flows into or out of the liquid cooling channel through a channel inlet and a channel outlet connected to the liquid cooling channel. The liquid cooling plate structure has a water inlet connector structure embedded thereon for connecting an external pipeline. The water inlet connector structure includes: a connector body, which includes at least one main flow channel, a plurality of lateral flow channels and at least one waterproof groove. The main flow channel connects an upper surface and a lower surface of the connector body. One end of the lateral flow channel is opened on the surrounding sidewall of the connector body, and the other end is opened to connect to the main flow channel. The waterproof groove is provided on the upper surface of the connector body and surrounds the main flow channel. And at least one sealing gasket disposed in the waterproof trench; the water inlet connector structure is installed at the flow channel inlet and / or the flow channel outlet to guide the inflow or outflow of the coolant, wherein the flow channel inlet and / or the flow channel outlet are connected to the lateral guide channel of the main flow channel.

8. The liquid-cooled plate structure according to claim 7, characterized in that, The thin plate has a protrusion at both the inlet and outlet of the flow channel to form a receiving space that communicates with the liquid cooling flow channel, for the water inlet connector structure to be embedded, and the opening of one end of the lateral guide channel located on the surrounding side wall of the connector body is completely located in the receiving space.

9. A battery module, characterized in that, The battery module includes: At least two liquid cooling plate structures are provided. Each liquid cooling plate structure utilizes two thin plates joined together to form at least one liquid cooling channel. A channel inlet and a channel outlet connected to the liquid cooling channel are used to allow a coolant to flow into or out of the liquid cooling channel. The liquid cooling plate structure has a water inlet connector structure embedded thereon for connecting an external pipeline. The water inlet connector structure includes: a connector body, which includes at least one main flow channel, a plurality of lateral flow channels and at least one waterproof groove. The main flow channel connects an upper surface and a lower surface of the connector body. One end of the lateral flow channel is opened on the surrounding sidewall of the connector body, and the other end is opened to connect to the main flow channel. The waterproof groove is provided on the upper surface of the connector body and surrounds the main flow channel. and at least one sealing gasket disposed in the waterproof trench; the water inlet connector structure is installed at the flow channel inlet and / or the flow channel outlet to guide the inflow or outflow of the coolant, wherein the flow channel inlet and / or the flow channel outlet communicates with the lateral guide channel; and At least one battery cell is sandwiched between the two liquid-cooled plate structures.

10. The battery module according to claim 9, characterized in that, The water inlet connector structure is stacked on top of each other along the same axis, so that the upper surface of the connector body abuts against the lower surface of the adjacent connector body.

11. The battery module according to claim 10, characterized in that, The lower surface of the connector body abuts against and contacts the sealing gasket on the upper surface of the adjacent connector body.

12. The battery module according to claim 11, characterized in that, The connector body also includes at least one fixing hole for a fastener to pass through and be fixed in place by means of the fixing holes in the connector bodies of the liquid cooling plate structures.

13. The battery module according to claim 9, characterized in that, The bottom of the lowest liquid cooling plate structure includes a fixed base that can seal the bottom of the water inlet connector structure of the lowest liquid cooling plate structure.

14. The battery module according to claim 9, characterized in that, The top of the uppermost liquid-cooled plate structure includes a water inlet head with a pipe fitting that allows the coolant to flow in or out.

15. The battery module according to claim 9, characterized in that, The thin plate has a protrusion at both the inlet and outlet of the flow channel to form a receiving space that communicates with the liquid cooling flow channel, so that the water inlet connector structure can be embedded and the opening of the side guide channel located on the side wall of the connector body is completely located in the receiving space.

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