Liquid cooling bottom plate and battery pack

Abstract

The utility model provides a liquid cooling bottom plate and a battery pack. The liquid cooling bottom plate comprises a base body, the base body is provided with a first flow channel and a second flow channel, the first flow channel and the second flow channel are overlapped, the side face, away from the second flow channel, of the first flow channel is provided with a first butt-joint port and a second butt-joint port, and the first butt-joint port is communicated with the first flow channel; and the sealing element is arranged in the first flow channel, the sealing element is provided with a communicating port spaced from the first flow channel, and the second butt joint port is in butt joint with the communicating port and communicates with the second flow channel through the communicating port. According to the utility model, the problems of complex structure and difficulty in manufacturing of the parallel cold plate in the prior art are solved, and the space utilization rate of the battery pack is improved.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and more specifically, to a liquid-cooled base plate and a battery pack. Background Technology

[0002] Currently, due to the demand for high energy density in battery packs, the number of batteries connected in series is constantly increasing, leading to further lengthening of the liquid cooling channels in the cold plates. This places higher demands on the temperature uniformity performance of the liquid cooling channels than before. Traditional series-connected liquid cooling channels in cold plates exacerbate the difference in cooling efficiency between the first and last batteries. Existing parallel channels in cold plates often require a complex "water distribution box" structure to converge the inlet and outlet refrigerant channels. This "water distribution box" connects the refrigerant inlet and outlet pipes to external pipes, achieving refrigerant circulation. However, these "water distribution boxes" are typically complex. If the refrigerant inlet and outlet pipes are directly connected to the cold plate without a "water distribution box," one pipe would need to pass through one flow channel to connect to another. Since the pipe needs to be separated and sealed from the flow channel it passes through, sealing and welding are inconvenient, making manufacturing difficult.

[0003] At the same time, due to the high energy density requirements of battery packs, the space utilization rate inside the battery pack casing urgently needs to be improved. Utility Model Content

[0004] The main objective of this invention is to provide a liquid-cooled base plate to solve the problems of complex structure and difficult manufacturing of parallel cold plates in the prior art, while improving the space utilization of the battery pack.

[0005] To achieve the above objectives, according to one aspect of the present invention, a liquid-cooled base plate is provided, comprising: a substrate having a first flow channel and a second flow channel, the first flow channel and the second flow channel being stacked on top of each other, the side of the first flow channel away from the second flow channel having a first pair of interfaces and a second pair of interfaces, the first pair of interfaces communicating with the first flow channel; and a sealing member disposed within the first flow channel, the sealing member having a communication port spaced apart from the first flow channel, the second pair of interfaces being connected to the communication port and communicating with the second flow channel through the communication port.

[0006] Furthermore, along the stacking direction between the first and second flow channels, the orthographic projection of the second interface on the surface of the seal is located within the range of the seal.

[0007] Furthermore, the surface of the second flow channel facing the first flow channel has a third pair of interfaces that are disposed through it, and the third pair of interfaces are connected to the connecting port.

[0008] Furthermore, along the stacking direction between the first and second flow channels, the orthographic projection of the third interface on the surface of the seal is located within the area of ​​the seal.

[0009] Furthermore, the substrate has a first side and a second side, with the first pair of interfaces and the second pair of interfaces both located on the first side. The substrate also has a connecting channel located on the second side, and the connecting channel is connected to both the first channel and the second channel.

[0010] Furthermore, the first flow channel and / or the second flow channel includes a common section and multiple branch sections. The common section is located on the first side, and each branch section is connected to the common section and extends along the line connecting the first side and the second side, and is connected to the connecting flow channel. The first pair of interfaces or the second pair of interfaces are connected to the common section.

[0011] Furthermore, the matrix comprises multiple sub-segments, which are sequentially connected along the length of the matrix.

[0012] Furthermore, the liquid-cooled base plate also includes a fixing beam, which is arranged transversely across the surface of the base.

[0013] Furthermore, the upper surface of the substrate has longitudinally upward extending flange structures, and the flange structures form a receiving area for accommodating the battery.

[0014] According to another aspect of the present invention, a battery pack is provided, including the liquid-cooled base plate described above.

[0015] By applying the technical solution of this utility model, a sealing element is provided within the first flow channel. This sealing element separates the connecting port on the sealing element from the first flow channel, preventing direct communication between them. Thus, the second pair of interfaces can connect with the second flow channel through the connecting port by mating with the sealing element. Due to the separating effect of the sealing element, the second pair of interfaces can only directly connect with the second flow channel, and cannot directly connect with the first flow channel, thereby ensuring the mating relationship between the first and second pairs of interfaces and the first and second flow channels respectively. Furthermore, since the sealing element can be directly set within the first flow channel during substrate processing, only the first and second pairs of interfaces need to be directly mated during manufacturing, greatly reducing manufacturing complexity and simplifying the overall structure of the liquid-cooled base plate. The above-described arrangement, through the use of a sealing element, simplifies the manufacturing of the liquid-cooled base plate, reduces structural complexity, and simplifies the overall structure. Attached Figure Description

[0016] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0017] Figure 1 A schematic diagram of the structure of the standard length liquid-cooled base plate of this utility model is shown;

[0018] Figure 2 A schematic diagram of the extended liquid-cooled base plate of this utility model is shown;

[0019] Figure 3 It shows Figure 1 Front sectional view of the liquid-cooled base plate in the middle;

[0020] Figure 4 It shows Figure 3 A magnified view of the first pair of interfaces;

[0021] Figure 5 It shows Figure 3 Enlarged view of the second pair of interfaces;

[0022] Figure 6 It shows Figure 1 Top view of the transverse section of the first flow channel in the middle;

[0023] Figure 7 It shows Figure 1 Top view of the transverse section of the second flow channel.

[0024] 10. Matrix; 11. First flow channel; 111. First interface; 112. Second interface; 113. Third interface; 12. Second flow channel; 13. First side; 14. Second side; 15. Connecting flow channel; 16. Front flow channel plug; 17. Rear flow channel plug; 20. Seal; 21. Connecting port; 30. Common section; 40. Branch section; 50. Fixed beam; 60. Flanged structure. Detailed Implementation

[0025] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0026] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0027] In this utility model, unless otherwise stated, directional terms such as "upper," "lower," "top," and "bottom" are generally used in relation to the direction shown in the accompanying drawings, or in relation to the vertical, perpendicular, or gravitational direction of the component itself; similarly, for ease of understanding and description, "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model.

[0028] To address the issues of complex structure and difficult manufacturing of parallel cold plates in existing technologies, and to improve the space utilization of battery packs, this invention provides a liquid-cooled base plate and a battery pack.

[0029] A first aspect of this application provides a liquid-cooled base plate.

[0030] like Figures 1 to 7 As shown, a liquid-cooled base plate in this embodiment includes a substrate 10 and a sealing member 20. The substrate 10 has a first flow channel 11 and a second flow channel 12, which are stacked on top of each other. The side of the first flow channel 11 away from the second flow channel 12 has a first pair of interfaces 111 and a second pair of interfaces 112. The first pair of interfaces 111 communicates with the first flow channel 11. The sealing member 20 is disposed in the first flow channel 11 and has a communication port 21 spaced apart from the first flow channel 11. The second pair of interfaces 112 is connected to the communication port 21 and communicates with the second flow channel 12 through the communication port 21.

[0031] In this embodiment, a sealing element 20 is provided within the first flow channel 11. This sealing element 20 separates the connecting port 21 from the first flow channel 11, preventing direct communication between them. Thus, the second pair of interfaces 112 can connect with the second flow channel 12 through the connecting port 21 via the sealing element 20. Due to the separating effect of the sealing element 20, the second pair of interfaces 112 can only directly connect with the second flow channel 12, and cannot directly connect with the first flow channel 11. This ensures the proper mating relationship between the first pair of interfaces 111 and the second pair of interfaces 112 with the first and second flow channels 11 and 12, respectively. Furthermore, since the sealing element 20 can be directly installed within the first flow channel 11 during the processing of the substrate 10, the manufacturing process only requires directly connecting the first pair of interfaces 111 and the second pair of interfaces 112, greatly reducing manufacturing complexity and simplifying the overall structure of the liquid-cooled base plate. The above-mentioned configuration makes the manufacturing of the liquid-cooled base plate simpler and reduces the complexity of the structure through the setting of the sealing element 20, and the overall structure is also simpler.

[0032] Optionally, the seal 20 in this embodiment can be separately disposed from the base 10, and the two can be assembled together by welding or other means as two independent components; or they can be integrated into one unit, in which case the base 10 and the seal 20 can be directly extruded using a profile mold, which is more convenient to manufacture.

[0033] In this embodiment, the sealing element 20 adopts a solid rib-like structure to ensure the separation effect. Of course, the sealing element 20 can also adopt other structural forms, as long as the separation effect can be guaranteed.

[0034] like Figures 3 to 5 As shown, in this embodiment, the first flow channel 11 and the second flow channel 12 are stacked on top of each other to form a double-layer flow channel, rather than arranged side by side, in order to achieve efficient distribution and recovery of media such as refrigerant. Furthermore, the stacking of the first flow channel 11 and the second flow channel 12 not only saves space but also enhances the uniformity of refrigerant distribution and improves cooling efficiency. The side of the first flow channel 11 away from the second flow channel 12 also has a first pair of interfaces 111 and a second pair of interfaces 112. One of the first pair of interfaces 111 and the second pair of interfaces 112 is used for refrigerant input, and the other is used for refrigerant output, thereby facilitating external communication between the two interfaces. In this embodiment, both the first flow channel 11 and the second flow channel 12 extend laterally, with the first flow channel 11 located above the second flow channel 12. In this configuration, the first pair of interfaces 111 serves as the inlet for refrigerant entry, and the second pair of interfaces 112 serves as the outlet for refrigerant exit. Thus, the refrigerant enters the upper first flow channel 11 through the first pair of interfaces 111, then enters the lower second flow channel 12, and finally exits through the second pair of interfaces 112. This double-layer flow channel design significantly improves cooling efficiency and uniformity, avoiding significant differences in cooling efficiency between the first and last battery cells, allowing the battery to maintain better performance and lifespan under high-rate operating conditions. Of course, the vertical positions of the first flow channel 11 and the second flow channel 12, as well as the inlet and outlet configurations of the first pair of interfaces 111 and the second pair of interfaces 112, can be interchanged as needed.

[0035] like Figure 6As shown, in this embodiment, along the stacking direction between the first flow channel 11 and the second flow channel 12, the orthographic projection of the second pair of interfaces 112 on the surface of the seal 20 is located within the range of the seal 20. This means that the width of the seal 20 completely covers the size of the second pair of interfaces 112, i.e., the width of the seal 20 is greater than the diameter of the second pair of interfaces 112. At the same time, the upper and lower surfaces of the seal 20 abut against the upper and lower surfaces of the first flow channel 11, respectively, i.e., the height of the seal 20 is not less than the height of the first flow channel 11. This allows the seal 20 to block the direct connection between the connecting port 21 and the first flow channel 11. In other words, there is a certain physical barrier between the connecting port 21 and the first flow channel 11. The second pair of interfaces 112 can only dock with the seal 20 and will not be exposed outside the range of the seal 20, thus preventing docking and connection with the first flow channel 11. This design ensures that the refrigerant can only be output to the second pair of interfaces 112 through the connecting port 21, and there will be no leakage or bypass of the refrigerant inside the first flow channel 11. The above design requires the refrigerant to flow along a predetermined path, ensuring precise distribution of the refrigerant between the two flow channels, thereby improving cooling efficiency and battery temperature uniformity.

[0036] In this embodiment, the second pair of interfaces 112 and the connecting port 21 are basically the same size and are basically aligned axially, so that the effective flow area formed between the second pair of interfaces 112 and the connecting port 21 is maximized, ensuring the smooth flow of refrigerant and thus ensuring the cooling effect.

[0037] like Figure 7 As shown, in this embodiment, the surface of the second flow channel 12 facing the first flow channel 11 has a through-type third pair of interfaces 113. More specifically, there is a partition plate between the first flow channel 11 and the second flow channel 12, which separates the first flow channel 11 and the second flow channel 12 into upper and lower layers. The third pair of interfaces 113 is formed on the partition plate and penetrates the partition plate from top to bottom, thereby enabling communication between the third pair of interfaces 113 and the second flow channel 12. Furthermore, the third pair of interfaces 113 corresponds to the position of the communication port 21 of the sealing member 20, and the third pair of interfaces 113 is connected to the communication port 21 to achieve the connection and conduction between the third pair of interfaces 113 and the second pair of interfaces 112 through the communication port 21, thereby realizing the precise transfer of refrigerant from the first flow channel 11 to the second flow channel 12 and then to the second pair of interfaces 112. In this way, the first pair of interfaces 111, the first flow channel 11, the second flow channel 12, the third pair of interfaces 113, the communication port 21, and the second pair of interfaces 112 are connected, realizing the circulation of refrigerant in them according to a predetermined path. This path design ensures that the refrigerant flow path within the liquid-cooled base plate is optimized, maximizing cooling effect and refrigerant utilization efficiency. After initial cooling in the first flow channel 11, the refrigerant enters the second flow channel 12 for further cooling, and finally flows out through the corresponding interface.

[0038] In this embodiment, the second pair of interfaces 112, the connecting port 21, and the third pair of interfaces 113 are basically the same size and are axially aligned, thereby ensuring the effective flow area.

[0039] Optionally, similar to the second pair of interfaces 112, along the stacking direction between the first flow channel 11 and the second flow channel 12, the orthographic projection of the third pair of interfaces 113 on the surface of the seal 20 is also located within the range of the seal 20, thereby avoiding direct communication between the third pair of interfaces 113 and the first flow channel 11. It should be noted that the direct communication mentioned in this embodiment refers to the direct docking and connection between the two parts without any intermediate part. For example, from the perspective of the flow channel as a whole, the first flow channel 11 and the second pair of interfaces 112 are connected, but due to the separation of the seal 20, the two are not directly docked and connected, but need to pass through the second flow channel 12 to be connected.

[0040] like Figure 6 As shown, in this embodiment, the substrate 10 has a first side 13 and a second side 14. In this embodiment, the first side 13 and the second side 14 are the two sides along the length of the substrate 10, that is, the two sides in the lateral direction of the substrate 10. The first pair of interfaces 111 and the second pair of interfaces 112 are both located on the first side 13, and are arranged on the same side to facilitate the maintenance and connection of the interfaces. The substrate 10 also has a connecting channel 15, which is located on the second side 14 of the substrate 10. The connecting channel 15 is connected to both the first channel 11 and the second channel 12. The purpose of the connecting channel 15 is to realize the internal connection between the first channel 11 and the second channel 12, so as to ensure that the refrigerant can circulate smoothly between the two channels, so that the refrigerant flows from the first channel 11 into the connecting channel 15, and then from the connecting channel 15 into the second channel 12. The connecting channel 15 not only serves as a passage for the refrigerant to transition from the first channel 11 to the second channel 12, but also balances the pressure between the two channels, optimizing the distribution and flow of the refrigerant, thereby improving the uniformity of the cooling effect. Through the internal connection of the connecting channel 15, the refrigerant can be evenly distributed in the two channels, effectively avoiding the difference in cooling efficiency between the first and last batteries caused by the long refrigerant flow path. This improves the overall temperature uniformity of the battery pack, ensures battery performance, and extends battery life.

[0041] In this embodiment, the flow channel extends laterally through the first side 13 end and the second side 14 end of the substrate 10. Therefore, in this embodiment, a front flow channel plug 16 and a rear flow channel plug 17 are respectively provided on the first side 13 and the second side 14. The front flow channel plug 16 and the rear flow channel plug 17 are used to seal the first side 13 end and the connecting flow channel 15 end, so that the first flow channel 11, the second flow channel 12 and the connecting flow channel 15 form a sealed space inside the substrate 10 between the first side 13 and the second side 14, ensuring that the refrigerant flows in the sealed space.

[0042] like Figure 6 As shown, in this embodiment, the seal 20 extends along the line connecting the first side 13 and the second side 14. This means that the direction of the seal 20 is consistent with the length direction of the base 10, and the two ends of the seal 20 extend to the ends of the first side 13 and the second side 14, respectively. This design ensures that the seal 20 can completely cover the entire length of the first flow channel 11, ensuring that the entire boundary of the first flow channel 11 is sealed, thereby establishing a stable sealing barrier. This achieves the sealed isolation between the first flow channel 11 and the connecting port 21, greatly reducing the risk of refrigerant leakage in the first flow channel 11 and maintaining the sealing performance of the entire cooling system. At the same time, this comprehensive coverage of the seal 20 also ensures that the refrigerant can only flow through the preset connecting port 21, rather than leaking or bypassing randomly, thereby improving the cooling efficiency and uniformity of the liquid cooling base plate. Of course, the seal 20 can also occupy only a part of the length of the base 10, so that the seal 20 can be set only at the connection port 21 and the docking point of the second pair of interfaces 112, and it is not necessary to set it in other positions. In this way, the complexity of the structure will be slightly increased, but the overall space size of the first flow channel 11 can be increased.

[0043] like Figure 6 and Figure 7As shown, in this embodiment, the first flow channel 11 and / or the second flow channel 12 have basically the same structure. Both adopt a parallel flow channel structure, that is, both include a common section 30 and multiple branch sections 40. Specifically, the common section 30 is located on the first side 13. The common section 30 serves as the starting point or convergence point of the refrigerant circulation, playing the role of refrigerant distribution and recovery. The branch sections 40 extend along the line connecting the first side 13 and the second side 14, that is, perpendicular to the direction of the common section 30. One end of each branch section 40 is connected to the common section 30. The purpose is to distribute the refrigerant evenly to various parts of the battery pack to achieve a wider heat exchange. The other end of each branch section 40 is connected to the connecting flow channel 15. Through the connecting flow channel 15, after the refrigerant has been initially cooled by the multiple branch sections 40 of the first flow channel 11, it can flow through the connecting flow channel 15 to the multiple branch sections 40 of the second flow channel 12 for further cooling, thereby improving cooling efficiency and temperature uniformity. The first pair of interfaces 111 or the second pair of interfaces 112 are connected to the common section 30. Thus, the overall flow path is as follows: when the refrigerant enters from the refrigerant inlet, it first gathers in the common section 30 of the first flow channel 11, and then distributes to each branch section 40 of the first flow channel 11 for cooling flow. This design ensures that the refrigerant is distributed as evenly as possible when entering the first flow channel 11. Then, the refrigerant in each branch section 40 of the first flow channel 11 enters each branch section 40 of the second flow channel 12 through the connecting flow channel 15. After further cooling, it finally gathers in the common section 30 of the second flow channel 12 and is discharged through the second pair of interfaces 112 to achieve circulation. By introducing a common section 30 and multiple branch sections 40 into the first flow channel 11 and the second flow channel 12, and by precisely designing the connection with the connecting flow channel 15 and the interface, on the one hand, the distribution and circulation path of the refrigerant are optimized, improving cooling efficiency and temperature uniformity, avoiding local overcooling or overheating, reducing energy loss, and simplifying the system structure and reducing maintenance costs. On the other hand, it ensures secondary circulation of the refrigerant, enabling the formation of a uniform temperature field within the battery pack, and avoiding the problem of differences in cooling efficiency between the first and last batteries caused by the long refrigerant flow channel. Of course, the structural forms of the first flow channel 11 and the second flow channel 12 can also be different, and one of them can adopt other structural forms of flow channels as needed.

[0044] In this embodiment, vertically arranged partitions are formed between the branch segments 40. The function of the partitions is to divide the flow channel into multiple horizontally parallel branch segments 40, thereby forming parallel flow channels. Partitions are provided in both the first flow channel 11 and the second flow channel 12. In this embodiment, the partitions of the first flow channel 11 and the second flow channel 12 are not aligned vertically, but staggered, which makes the overall structure of the base 10 more stable.

[0045] Optionally, the common section 30 is typically designed to be wider to accommodate larger flow rates of refrigerant input or output, and the size and number of branch sections 40 can be adjusted according to the size, shape, and cooling requirements of the battery pack.

[0046] Optionally, the substrate 10 includes multiple sub-segments, which can be sequentially spliced ​​together along the length of the substrate 10 to form the substrate 10 as a whole. For example... Figure 2 The extended liquid-cooled base plate shown has a base 10 with two sub-segments. This modular design not only ensures efficient cooling and uniform battery temperature but also allows for rapid adjustment of the base 10's length to meet specific customer needs, improving design and manufacturing flexibility, significantly shortening product development cycles, and reducing costs. Of course, the base 10 can also consist of only one sub-segment, in which case the liquid-cooled base plate would be as shown... Figure 1 The standard length of the liquid-cooled base plate is shown.

[0047] Optionally, the number of sub-segments can be set to other numbers. By connecting different numbers of sub-segments, the total length of the base 10 can be flexibly adjusted to accommodate battery packs of different sizes and capacities.

[0048] It should be noted that when the length of the liquid-cooled base plate is extended by splicing multiple sub-segments, the sub-segments can be interconnected, thus forming interconnected flow channels inside the base 10. In this case, only the first pair of interfaces 111, the second pair of interfaces 112, and the third pair of interfaces 113 at the end of one sub-segment located in the length direction need to be provided with related structures for liquid inlet and outlet. When the refrigerant enters the first flow channel 11 through the first pair of interfaces 111, it will pass through all the sub-segments in sequence, and then be discharged from the second pair of interfaces 112 through the second flow channel 12. At the same time, the front flow channel plug 16 and the rear flow channel plug 17 only need to be provided at the ends of the two sub-segments located in the length direction; the middle sub-segments do not need to be provided with the front flow channel plug 16 and the rear flow channel plug 17. Of course, in addition to the above-mentioned method of forming interconnected flow channels, each sub-segment can also be set relatively independently as needed. Each sub-segment is provided with a first pair of interfaces 111, a second pair of interfaces 112 and other structures to realize liquid inlet and outlet. In this case, each sub-segment can be provided with a front flow channel plug 16 and a rear flow channel plug 17 at the end, so that each sub-segment forms its own independent flow channel.

[0049] like Figure 1 and Figure 2As shown, in this embodiment, the liquid-cooled base plate also includes a fixing beam 50. Specifically, the fixing beam 50 is designed to be horizontally arranged across the surface of the base 10, that is, across both sides of the base 10 perpendicular to its length. This arrangement can effectively distribute the weight of the battery pack and prevent deformation of the base 10 due to excessive single-point load. Through the fixing beam 50, the battery pack is firmly fixed, ensuring stable contact between the batteries inside the battery pack and preventing performance degradation or safety hazards caused by mechanical stress between the batteries. This embodiment has two fixing beams 50, spaced apart along the length of the base 10.

[0050] Optionally, the number of fixing beams 50 can be set as needed, and the structural design of the fixing beams 50 needs to take into account the weight and size of the battery pack. The fixing beams 50 are usually made of high-strength materials, such as aluminum alloy, stainless steel or composite materials, to ensure effective support for the battery pack and to withstand large loads without deformation or damage. In addition, the connection between the fixing beams 50 and the base 10 can be achieved by welding, bolting or snap-fit ​​connection, as long as the connection strength between the fixing beams 50 and the base 10 is ensured.

[0051] This embodiment provides two lengths of liquid-cooled base plate, such as... Figure 1 The diagram shows a standard-length liquid-cooled base plate with two fixed beams 50 located near the sides along its length. In this configuration, the liquid-cooled base plate is relatively short. Figure 2 The image shows an extended liquid-cooled base plate, which is equipped with three fixing beams 50. In addition to the two fixing beams 50 in the standard length, there is a fixing beam 50 in the middle position, which can play a further role in fixing and ensuring the overall structural stability and reliability of the liquid-cooled base plate.

[0052] like Figure 1 and Figure 2 As shown, in this embodiment, the upper surface of the substrate 10 has a longitudinally extending flange structure 60. The flange structure 60 can effectively fix the battery and prevent the battery from shifting or vibrating within the tray. The flange structures 60 form a receiving area for accommodating the battery. Specifically, the substrate 10 has upwardly extending flange structures 60 on both sides parallel to its length direction. In this way, the flange structures 60 and the fixing beam 50 can form a continuous receiving area for accommodating the battery pack. Within the receiving area, the flange structures 60 and the fixing beam 50 can effectively support the outer side of the battery pack, ensuring the battery is firmly fixed in all directions and preventing displacement or vibration of the battery pack. In addition, the flange structure 60 can also provide a certain degree of mechanical protection for the battery, reducing the risk of collision or scratches to the battery during transportation or installation, further ensuring the integrity and safety of the battery.

[0053] A second aspect of this application provides a battery pack including the aforementioned liquid-cooled base plate.

[0054] Specifically, the base plate of the battery pack is the aforementioned liquid-cooled base plate. The battery pack also includes four side plates and a top cover. The four side plates and the aforementioned liquid-cooled base plate enclose a receiving space, which is used to receive the battery pack. The top cover seals the receiving space to form the battery pack.

[0055] In this embodiment, the bottom plate of the battery pack and the liquid cooling plate are integrated into one unit to form a liquid-cooled bottom plate. That is, the liquid cooling channel is set inside the bottom plate to form a liquid-cooled bottom plate. Compared with the prior art, there is no need to set up an additional liquid cooling plate. While ensuring the structural strength, the space utilization of the battery pack is improved, so that the battery pack can accommodate more batteries, thereby improving the energy density of the battery pack.

[0056] As can be seen from the above description, the embodiments of this utility model achieve the following technical effects:

[0057] 1. This technology solves the problems of complex structure and difficult manufacturing of parallel cold plates in existing technologies;

[0058] 2. The dual-layer flow channel design significantly improves cooling efficiency and cooling uniformity, avoiding significant differences in cooling efficiency between the first and last batteries, enabling the battery to maintain better performance and lifespan under high-rate operating conditions.

[0059] 3. The design of the sealing element ensures that the second pair of interfaces can only be directly connected to the second flow channel, and cannot be directly connected to the first flow channel.

[0060] 4. The length can be adjusted as needed, which improves the flexibility of design and manufacturing, significantly shortens the product development cycle, and reduces costs.

[0061] 5. The base plate and liquid cooling plate are integrated into one unit to form a liquid-cooled base plate, eliminating the need for an additional liquid cooling plate and improving the space utilization of the battery pack.

[0062] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0063] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0064] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A liquid cooled floor panel, characterized by, include: The substrate (10) has a first flow channel (11) and a second flow channel (12), the first flow channel (11) and the second flow channel (12) are stacked on each other, the side of the first flow channel (11) away from the second flow channel (12) has a first pair of interfaces (111) and a second pair of interfaces (112), the first pair of interfaces (111) are in communication with the first flow channel (11); A sealing element (20) is disposed in the first flow channel (11). The sealing element (20) has a communication port (21) spaced apart from the first flow channel (11). The second pair of interfaces (112) is connected to the communication port (21) and communicates with the second flow channel (12) through the communication port (21).

2. The liquid cooled floor according to claim 1, wherein, Along the stacking direction between the first flow channel (11) and the second flow channel (12), the orthographic projection of the second interface (112) on the surface of the seal (20) is located within the range of the seal (20).

3. The liquid cooled floor according to claim 1, wherein, The surface of the second flow channel (12) facing the first flow channel (11) has a third pair of interfaces (113) that are disposed through it, and the third pair of interfaces (113) are connected to the communication port (21).

4. The liquid cooled floor according to claim 3, wherein, Along the stacking direction between the first flow channel (11) and the second flow channel (12), the orthographic projection of the third interface (113) on the surface of the seal (20) is located within the range of the seal (20).

5. The liquid cooled floor according to claim 1, wherein, The substrate (10) has a first side (13) and a second side (14) opposite to each other. The first pair of interfaces (111) and the second pair of interfaces (112) are both located on the first side (13). The substrate (10) also has a connecting channel (15) located on the second side (14) and the connecting channel (15) is connected to both the first channel (11) and the second channel (12).

6. The liquid cooled floor according to claim 5, wherein, The first flow channel (11) and / or the second flow channel (12) includes a common section (30) and a plurality of branch sections (40). The common section (30) is located on the first side (13). Each of the branch sections (40) is connected to the common section (30) and extends along the line connecting the first side (13) and the second side (14), and is connected to the connecting flow channel (15). The first pair of interfaces (111) or the second pair of interfaces (112) is connected to the common section (30).

7. The liquid cooled floor panel according to any one of claims 1 to 6, wherein, The substrate (10) includes multiple sub-segments, which are sequentially connected along the length of the substrate (10).

8. The liquid cooled floor panel according to any one of claims 1 to 6, wherein, The liquid-cooled base plate also includes a fixing beam (50), which is arranged transversely across the surface of the base (10).

9. The liquid cooled floor according to any one of claims 1 to 6, wherein, The upper surface of the substrate (10) has longitudinally upward extending flange structures (60), and the flange structures (60) form a receiving area for accommodating the battery.

10. A battery pack, characterized by, Includes the liquid-cooled base plate according to any one of claims 1 to 9.

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