Liquid cooling connecting device

Abstract

The utility model provides a liquid cooling connecting device. The liquid cooling connecting device comprises a slow flow cavity used for storing cooling liquid; the slow flow cavity comprises a first surface in butt joint with the battery shell and a second surface connected with an outer side liquid circulation pipeline; the liquid cooling quick plug is arranged on the second surface; a first liquid inlet and a first liquid outlet which are communicated with a liquid cooling channel in the battery are formed in the first surface. According to the utility model, through the design of the slow flow cavity, the flowing speed of the cooling liquid is homogenized, so that the uniform cooling of the battery is effectively ensured, and meanwhile, the pressure fluctuation in the system is relieved; in addition, the detachable design of the liquid cooling quick plug simplifies the connection of liquid cooling systems inside and outside the battery, improves the maintenance convenience and the maneuverability of system connection, and enhances the adaptability and flexibility of the liquid cooling system in different application scenarios.

Description

Technical Field

[0001] This utility model belongs to the field of battery thermal management technology, specifically relating to a liquid cooling connection device. Background Technology

[0002] With the development of the times, the new energy industry is experiencing unprecedented attention and rapid development. Against this backdrop, the thermal management of battery cells and related modules has become increasingly prominent, becoming an important research direction within the industry. Especially in electric vehicles and renewable energy storage systems, battery thermal management directly affects their performance, safety, and lifespan. Therefore, how to effectively manage battery heat to improve heat dissipation efficiency has become a key technical problem that urgently needs to be solved in the industry.

[0003] Currently, battery cooling typically relies on liquid cooling or air cooling systems. Liquid cooling systems have attracted significant attention due to their superior heat dissipation efficiency and space utilization. Current liquid cooling systems mainly consist of liquid cooling channel components and liquid cooling connection devices, with the latter responsible for the introduction and removal of coolant and forming a crucial part of the system.

[0004] However, existing liquid cooling connection devices face two main challenges. First, to prevent coolant leakage, traditional liquid cooling connection devices are typically complex in design, with cumbersome and time-consuming fabrication and installation processes, increasing production and maintenance difficulties. Achieving rapid and convenient installation of liquid cooling connection devices has become a major research focus. Second, when there are multiple inlets in the liquid cooling channel, the coolant flow rate may be uneven due to factors such as differences in flow path length, leading to uneven battery cooling. Therefore, simplifying the design of the liquid cooling connection device while ensuring the uniformity of coolant inflow has become a key research focus. Utility Model Content

[0005] To address the problems existing in the prior art, this utility model proposes a liquid cooling connection device. Through the design of a slow-flow cavity and a liquid cooling quick plug, the liquid cooling connection device can be installed quickly while ensuring the uniformity of coolant flow, thus avoiding uneven battery temperature caused by uneven coolant flow.

[0006] Firstly, this solution proposes a liquid-cooled connection device including:

[0007] A flow-retarding chamber for storing coolant; the flow-retarding chamber includes a first surface that abuts against the battery casing and a second surface that connects to an external liquid circulation pipeline; the flow-retarding chamber is provided with a partition that divides the inner cavity into an inlet flow-retarding chamber and an outlet flow-retarding chamber;

[0008] Liquid-cooled fast plugs are mounted on the second surface;

[0009] The first surface has a first liquid inlet that connects the internal liquid cooling channel of the battery and the liquid inlet slow flow cavity, and a first liquid outlet that connects the internal liquid cooling channel of the battery and the liquid outlet slow flow cavity.

[0010] As a further embodiment, the baffle is positioned on the vertical axis of symmetry of the slow-flow cavity.

[0011] As a further embodiment, the slow-flow cavity also includes a top cover, which cooperates with the slow-flow cavity and is fixedly connected to the top of the slow-flow cavity for encapsulating the slow-flow cavity.

[0012] As a further embodiment, the top cover is provided with a groove that mates with the partition.

[0013] The flow-slowing cavity also includes a protruding flow-slowing platform disposed within the first surface.

[0014] As a further embodiment, the flow-slowing platform is arranged on the horizontal axis of symmetry of the flow-slowing cavity and is divided into an inlet flow-slowing platform and an outlet flow-slowing platform by a partition. The inlet flow-slowing platform is located in the inlet flow-slowing cavity, and the outlet flow-slowing platform is located in the outlet flow-slowing cavity.

[0015] As a further embodiment, the first liquid inlet is set on the liquid inlet slow flow platform, and the first liquid outlet is set on the liquid outlet slow flow platform.

[0016] As a further embodiment, the flow-slowing platform is also provided with a protruding flow-slowing clip, which is positioned between the first liquid inlet and the first liquid outlet.

[0017] As a further solution, the flow control platform is also equipped with a support clip for fixing the connecting partition.

[0018] As a further embodiment, the slow-flow platform is also provided with protruding connecting platforms at both ends. The connecting platforms are provided with connecting holes for connecting the internal structure of the battery. The slow-flow cavity is threadedly connected to the internal structure of the battery through the connecting holes.

[0019] The liquid inlet slow flow cavity and the liquid outlet slow flow cavity are each provided with a plug interface that mates with the liquid cooling fast plug on their second surfaces.

[0020] As a further embodiment, the plug interface is located at the bottom of the side plate of the inlet and outlet slow-flow chambers.

[0021] The liquid-cooled quick connector includes a fixing part, a plug liquid-cooled flow channel that mates with the plug interface, and a snap-fit ​​assembly.

[0022] One end of the plug liquid cooling channel passes through the fixing part, which is located at the end of the liquid cooling fast plug. The snap-fit ​​assembly is set on the upper and lower sides of the plug liquid cooling channel, and works with the plug interface and the fixing part to complete the snap-fit ​​of the liquid cooling fast plug on the slow flow cavity. The fixing part is also provided with an external liquid cooling interface for external coolant to flow in.

[0023] The components include a retaining plate and a retaining plate groove. One side of the retaining plate is fixed to the plug liquid cooling channel, with the included angle between the retaining plate and the plug liquid cooling channel selected from 15° to 35°. The retaining plate groove is located on the plug liquid cooling channel below the retaining plate and cooperates with the retaining plate. The retaining plate can be retracted into the retaining plate groove under the action of elasticity.

[0024] The snap-fit ​​assembly and the fixing part are provided with a sealing ring and a sealing ring groove that cooperates with the sealing ring.

[0025] Secondly, this solution also provides a mandrel liquid cooling device, including the liquid cooling connection device proposed in this solution.

[0026] Thirdly, this solution also provides a liquid-cooled battery, including the liquid-cooled connection device proposed in this solution.

[0027] Compared with the prior art, the present invention has at least the following beneficial effects:

[0028] (1) The flow rate of the coolant can be adjusted by the design of the slow-flow chamber, thereby achieving uniform flow rate of the multi-channel coolant. This not only ensures uniform cooling of all parts of the battery, but also alleviates pressure fluctuations in the system and ensures that the coolant circulates under appropriate pressure, thus protecting other components.

[0029] (2) The detachable design of the liquid cooling quick-connect plug simplifies the connection between the internal and external liquid cooling systems of the battery, solving the problems of complex connections and difficult maintenance associated with traditional methods. The quick-connect design significantly improves the ease of system maintenance. Furthermore, the detachable liquid cooling quick-connect plug enhances the mobility of system connections, allowing technicians to replace the external cooling system according to different needs. This design greatly enhances the adaptability and flexibility of the liquid cooling system in various application scenarios. Attached Figure Description

[0030] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of this utility model. The illustrative embodiments of this utility model and their descriptions are used to explain this utility model and do not constitute an improper limitation of this utility model.

[0031] In the attached diagram:

[0032] Figure 1 This is a structural diagram of the slow-flow cavity 1;

[0033] Figure 2 Top view of the slow-flow cavity 1 (without top cover);

[0034] Figure 3 This is a structural diagram of the top cover 14;

[0035] Figure 4 (a) is a structural diagram of the liquid-cooled quick-connect plug, and (b) is a longitudinal section diagram of the liquid-cooled quick-connect plug.

[0036] Wherein, 1-slow flow chamber; 11-first liquid inlet; 12-first liquid outlet; 13-partition; 14-top cover; 15-slow flow platform; 151-liquid inlet slow flow platform; 152-liquid outlet slow flow platform; 153-slow flow clip; 154-support clip; 155-connecting platform; 156-connecting hole; 16-plug interface; 17-liquid inlet slow flow chamber; 18-liquid outlet slow flow chamber; 2-liquid cooling quick plug; 21-fixing part; 22-plug liquid cooling channel; 23-external liquid cooling interface; 241-clamping plate; 242-clamping plate groove; 25-sealing ring; 26-sealing ring groove. Detailed Implementation

[0037] For ease of understanding, the present invention will be described more comprehensively below, and embodiments of the present invention will be given, but this does not limit the scope of the present invention.

[0038] Firstly, such as Figure 1-2 This solution proposes a liquid-cooled connection device including:

[0039] A slow-flow chamber 1 for storing coolant; the slow-flow chamber 1 includes a first surface that docks with the battery casing and a second surface that connects to the outer liquid circulation pipeline; the slow-flow chamber 1 is provided with a partition 13 that divides the inner cavity into an inlet slow-flow chamber 17 and an outlet slow-flow chamber 18.

[0040] A detachable liquid-cooled fast connector 2 fixed to the second surface;

[0041] The first surface has a first liquid inlet 11 that connects the internal liquid cooling channel of the battery and the liquid inlet slow flow cavity 17, and a first liquid outlet 12 that connects the internal liquid cooling channel of the battery and the liquid outlet slow flow cavity 18.

[0042] In this solution, by setting up a slow-flow chamber 1 and a liquid-cooled quick connector 2, we have constructed a highly efficient, flexible, and reliable liquid-cooling connection device through their synergistic effect. On the one hand, we use the slow-flow chamber 1 to buffer the coolant and regulate the coolant flow rate, avoiding turbulence at the inlet or outlet, thereby achieving uniform flow rate of the multi-channel coolant and ensuring uniform cooling of all parts of the battery. On the other hand, the presence of the slow-flow chamber 1 also helps to alleviate pressure fluctuations within the liquid-cooling system, ensuring that the coolant circulates under appropriate pressure to protect other components. Thirdly, we have set a liquid cooling quick connector 2 on the second surface of the slow flow cavity 1. Through the detachable liquid cooling quick connector 2, we can easily connect the internal liquid cooling system of the battery with the external liquid cooling system, solving the problems of complex internal and external connections and difficult maintenance in the traditional way. More interestingly, in addition to simplifying the connection between the internal and external liquid cooling systems, the detachable liquid cooling quick connector 2 also improves the mobility of the liquid cooling system connection. The detachable and fixed liquid cooling quick connector 2 allows technicians to replace the external cooling system as needed. This design greatly improves the flexibility of the battery liquid cooling system and enhances the adaptability of the liquid cooling system in different application scenarios.

[0043] The slow-flow chamber 1 further includes a partition 13, which divides the slow-flow chamber 1 into an inlet slow-flow chamber 17 and an outlet slow-flow chamber 18.

[0044] As a further embodiment, the baffle 13 is positioned on the vertical axis of symmetry of the flow-retarding chamber 1. Positioning the baffle on the vertical axis of symmetry helps to evenly distribute the coolant flow while reducing turbulence and mixing. This design helps ensure more efficient coolant flow between the inlet flow-retarding chamber 17 and the outlet flow-retarding chamber 18, thereby improving the cooling effect on the battery. By positioning the baffle on the vertical axis of symmetry, better symmetry and flow path optimization are achieved, allowing the coolant to more evenly cover the battery surface, thus improving overall cooling efficiency. Furthermore, this arrangement simplifies the design of the flow path and reduces potential eddies or dead zones during liquid flow, thereby ensuring the reliability and stability of the system.

[0045] As a further embodiment, the flow-slowing cavity 1 also includes a top cover 14, which mates with the flow-slowing cavity 1 and is fixedly connected to the top of the flow-slowing cavity 1 for encapsulating the flow-slowing cavity 1. Figure 3 ).

[0046] As a further solution, the top cover 14 is provided with a groove that mates with the partition 13, so as to better mate with the partition 13.

[0047] The flow-slowing cavity 1 also includes a raised flow-slowing platform 15 disposed within the first surface. The flow-slowing platform 15 helps optimize the flow path of the coolant. By guiding the flow of the coolant within the flow-slowing cavity, it slows down the liquid flow rate and promotes uniform liquid distribution. This flow control effectively improves heat exchange efficiency, ensuring the temperature uniformity and stability of the battery. Furthermore, the design of the flow-slowing platform reduces hydraulic shock, decreases the impact force and noise on the flow-slowing cavity, and extends the service life of the components.

[0048] As a further embodiment, the flow-regulating platform 15 is positioned on the horizontal axis of symmetry of the flow-regulating cavity 1, and is divided by the partition 13 into an inlet flow-regulating platform 151 and an outlet flow-regulating platform 152. The inlet flow-regulating platform 151 is located within the inlet flow-regulating cavity 17, and the outlet flow-regulating platform 152 is located within the outlet flow-regulating cavity 18. The flow-regulating platform 15, positioned on the horizontal axis of symmetry of the flow-regulating cavity 1, effectively reduces the liquid stagnation area, avoids dead zones in the coolant flow process, and improves the overall performance and reliability of the cooling system.

[0049] As a further embodiment, the first liquid inlet 11 is disposed on the liquid inlet slow flow platform 151, and the first liquid outlet 12 is disposed on the liquid outlet slow flow platform 152.

[0050] As a further embodiment, the flow-regulating platform 15 is also provided with a protruding flow-regulating clip 153, which is disposed between the first liquid inlet 11 and between the first liquid outlet 12. The flow-regulating clip 153 disposed between the first liquid inlet 11 and the first liquid outlet 12 can optimize the flow path and velocity of the coolant and prevent uneven flow velocity caused by fluid turbulence.

[0051] As a further solution, the flow control platform 15 is also provided with a support clip 154 ​​for fixing the connecting partition 13.

[0052] As a further embodiment, the slow-flow platform 15 is provided with protruding connecting platforms 155 at both ends. The connecting platforms 155 are provided with connecting holes 156 for connecting the internal structure of the battery. The slow-flow cavity 1 is threadedly connected to the internal structure of the battery through the connecting holes 156.

[0053] The liquid inlet slow flow cavity 17 and the liquid outlet slow flow cavity 18 are each provided with a plug interface 16 that mates with the liquid cooling fast plug 2 on their second surfaces.

[0054] As a further embodiment, the plug-in interface 16 is located at the bottom of the side plate of the liquid inlet slow flow chamber 17 and the liquid outlet slow flow chamber 18. The function of the plug-in interface 16 is to connect the liquid cooling fast plug 2, thereby connecting the external cooling system and the slow flow chamber. By placing the plug-in interface 16 at the bottom of the side plate, it can ensure that the coolant flows more smoothly into and out of the slow flow chamber, reducing flow resistance and turbulence. On the other hand, the bottom placement can help eliminate air bubbles in the coolant, as air bubbles will rise naturally, thereby reducing interference with the liquid flow path and the impact on cooling efficiency.

[0055] like Figure 4 The liquid-cooled quick connector 2 includes a fixing part 21, a plug liquid-cooled flow channel 22 that cooperates with the plug interface 16, and a snap-fit ​​assembly 24.

[0056] One end of the plug liquid cooling channel 22 passes through the fixing part 21, which is located at the end of the liquid-cooled quick plug 2. A snap-fit ​​assembly 24 is disposed on the upper and lower sides of the plug liquid cooling channel 22, cooperating with the plug interface 16 and the fixing part 21 to snap the liquid-cooled quick plug 2 onto the slow-flow cavity 14. The fixing part 21 is also provided with an external liquid cooling interface 23 for external coolant to flow in. Through the snap-fit ​​assembly 24, the liquid-cooled quick plug 2 can be quickly inserted and removed from the slow-flow cavity 1, greatly saving and simplifying the connection and sealing steps between the internal and external liquid cooling systems, thus optimizing work efficiency.

[0057] The device includes a retaining plate 241 and a retaining plate groove 242. One side of the retaining plate 241 is fixed on the plug liquid cooling channel 22, and the included angle between the retaining plate 241 and the plug liquid cooling channel 22 is selected from 15°-35°. The retaining plate groove 242 is disposed on the plug liquid cooling channel 22 below the retaining plate 241 and cooperates with the retaining plate 241. The retaining plate 241 can be retracted into the retaining plate groove 242 under the action of elasticity.

[0058] The snap-fit ​​assembly 24 and the fixing part 21 are further provided with a sealing ring 25 and a sealing ring groove 26 that mates with the sealing ring 25. The sealing ring 25 and the sealing ring groove 26 help to improve the sealing performance of the liquid-cooled quick connector 2 and prevent coolant leakage.

[0059] Secondly, this solution also provides a mandrel liquid cooling device, including the liquid cooling connection device proposed in this solution.

[0060] Thirdly, this solution also provides a liquid-cooled battery, including the liquid-cooled connection device proposed in this solution.

[0061] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0062] Example 1

[0063] Assembly of a battery with a liquid-cooled connection device:

[0064] Aluminum foil is selected as the positive electrode current collector layer, and the aluminum foil tab portion is retained. Lithium iron phosphate is selected as the positive electrode active material coating. Copper foil is selected as the negative electrode current collector layer, and the aluminum foil tab portion is retained. Graphite is selected as the negative electrode active material. The cells are wound onto the winding needle of the winding equipment in a stacked structure of separator-negative electrode sheet-separator-positive electrode sheet. After winding, the wound core is removed from the equipment by the needle-pulling function of the equipment. Then the core is flattened and the cell is welded to the positive and negative current collector integrated cover plate assembly. The cell is placed into the battery casing, ensuring that the liquid cooling channel is connected to the connection hole 156. Then the top cover 14 is snapped into the slow flow cavity 17 and slow flow cavity 18. The assembly gap is laser welded to achieve the top cover sealing of the slow flow cavity 17 and slow flow cavity 18. The liquid cooling quick connector 2 is inserted into the external liquid cooling interface 23 to obtain a battery with a liquid cooling connection device.

[0065] The technical features of the embodiments described above can be combined arbitrarily. For the sake of brevity, not all possible combinations of the technical features in the above embodiments have been described. However, as long as the combination of these technical features does not contradict each other, it should be considered within the scope of this specification. Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make modifications, alterations, substitutions, and variations to the above embodiments within the scope of the present invention. Furthermore, without contradiction, those skilled in the art can combine and integrate different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

Claims

1. A liquid-cooled connection device, characterized in that, include: A slow-flow chamber (1) for storing coolant; the slow-flow chamber (1) includes a first surface that docks with the battery casing and a second surface that connects to the outer liquid circulation pipeline; the slow-flow chamber (1) is provided with a partition (13) that divides the inner cavity into an inlet slow-flow chamber (17) and an outlet slow-flow chamber (18). Liquid cooling fast plug (2) is disposed on the second surface; A first liquid inlet (11) is provided on the first surface, which connects the internal liquid cooling channel of the battery and the liquid inlet slow flow cavity (17), and a first liquid outlet (12) is provided, which connects the internal liquid cooling channel of the battery and the liquid outlet slow flow cavity (18).

2. The liquid-cooled connection device according to claim 1, characterized in that, The partition (13) is disposed on the vertical axis of symmetry of the slow-flow cavity (1); The slow-flow cavity (1) also includes a top cover (14), which is fitted with the slow-flow cavity (1) and fixedly connected to the top of the slow-flow cavity (1) for sealing the slow-flow cavity (1). The top cover (14) is provided with a groove that cooperates with the partition (13).

3. The liquid-cooled connection device according to claim 1, characterized in that, The slow-flow cavity (1) also includes a protruding slow-flow platform (15) disposed in the first surface. The slow flow platform (15) is set on the horizontal axis of symmetry of the slow flow cavity (1) and is divided into an inlet slow flow platform (151) and an outlet slow flow platform (152) by a partition (13). The inlet slow flow platform (151) is located in the inlet slow flow cavity (17) and the outlet slow flow platform (152) is located in the outlet slow flow cavity (18). The first liquid inlet (11) is set on the liquid inlet slow flow platform (151), and the first liquid outlet (12) is set on the liquid outlet slow flow platform (152); The slow-flow platform (15) is also provided with a protruding slow-flow card (153), which is located between the first liquid inlet (11) and the first liquid outlet (12). The slow-flow platform (15) is also provided with a support clip (154) for fixing the connecting partition (13). The slow-flow platform (15) is also provided with protruding connecting platforms (155) at both ends. The connecting platforms (155) are provided with connecting holes (156) for connecting the internal structure of the battery. The slow-flow cavity (1) is threadedly connected to the internal structure of the battery through the connecting holes (156).

4. The liquid-cooled connection device according to claim 1, characterized in that, The second surfaces of the liquid inlet slow flow chamber (17) and the liquid outlet slow flow chamber (18) are each provided with a plug interface (16) that mates with the liquid cooling fast plug (2). The plug interface (16) is located at the bottom of the side plate of the inlet slow flow chamber (17) and the outlet slow flow chamber (18).

5. The liquid-cooled connection device according to claim 1, characterized in that, The liquid-cooled quick connector (2) includes a fixing part (21), a plug liquid-cooled flow channel (22) that cooperates with the plug interface (16), and a snap-fit ​​assembly (24); wherein, one end of the plug liquid-cooled flow channel (22) passes through the fixing part (21). The fixing part (21) is located at the end of the liquid-cooled quick plug (2), and the snap-fit ​​assembly (24) is set on the upper and lower sides of the plug liquid-cooled flow channel (22). It works with the plug interface (16) and the fixing part (21) to complete the snap-fit ​​of the liquid-cooled quick plug (2) on the slow flow cavity (1). The fixing part (21) is also provided with an external liquid-cooled interface (23) for external coolant to flow in.

6. The liquid-cooled connection device according to claim 1, characterized in that, The card plate (241) and the card plate groove (242) are provided. One side of the card plate (241) is fixed on the plug liquid cooling channel (22) and the included angle between the card plate (241) and the plug liquid cooling channel (22) is selected from 15°-35°. The card plate groove (242) is provided on the plug liquid cooling channel (22) below the card plate (241) and cooperates with the card plate (241). The card plate (241) can be put into the card plate groove (242) under the action of elasticity.

7. The liquid-cooled connection device according to claim 5, characterized in that, A sealing ring (25) and a sealing ring groove (26) that cooperate with the sealing ring (25) are also provided between the snap-fit ​​assembly (24) and the fixing part (21).

8. A mandrel liquid cooling device, characterized in that, Includes the liquid-cooled connection device as described in any one of claims 1-7.

9. A liquid-cooled battery, characterized in that, It includes the mandrel liquid cooling device as described in claim 8.

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