Special liquid cooling device for storage battery

Abstract

The invention provides a liquid cooling device special for a storage battery. The liquid cooling device comprises a liquid cooling core rod and a liquid cooling connecting assembly, a liquid cooling channel is arranged in the liquid cooling core rod, the liquid cooling channel comprises an upstream liquid cooling channel and a downstream liquid cooling channel which are parallel to the central axis of the liquid cooling core rod, a liquid outlet of the upstream liquid cooling channel is communicated to a liquid inlet of the downstream liquid cooling channel, and a liquid inlet and a liquid outlet of the liquid cooling channel are located at the lower end of the liquid cooling core rod; the liquid cooling connection assembly is connected with the liquid cooling core rod through the battery shell, the liquid cooling connection assembly comprises a liquid storage cabin and liquid cooling plugs, a liquid storage cabin liquid inlet and a liquid storage cabin liquid outlet which are connected with the liquid cooling core rod are formed in the liquid storage cabin, and the liquid cooling plugs are inserted into the two sides of the liquid storage cabin. According to the liquid cooling device, the heat dissipation performance of the liquid cooling device is improved, meanwhile, the bearing capacity of the liquid cooling core rod is optimized, the connection complexity is simplified, and the liquid cooling device which is high in heat dissipation capacity, high in stability and easy to connect is obtained.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of batteries, and particularly relates to a liquid cooling device special for storage batteries. BACKGROUND

[0002] With the increasing attention to new energy, the application range of batteries is also expanding. However, in actual use, the electrical performance and safety of the battery are significantly affected by temperature. During the charging and discharging process, the battery will generate a large amount of heat, and the accumulation and uneven distribution of heat will directly affect the electrochemical performance and safety of the battery. When the battery temperature is too high, the performance will decrease, and heat runaway may be triggered, which may even cause the battery to catch fire or explode.

[0003] Therefore, in order to ensure the safety and performance of the battery, the battery module or battery box needs to implement effective cooling measures. In the current battery management system, the thermal management scheme usually includes three types: air cooling, liquid cooling and phase change cooling. Among them, the battery thermal management system based on liquid cooling plate has become the mainstream choice.

[0004] The liquid cooling plate in the prior art has various forms, which can be mainly divided into punch plate type, blow molding type, harmonica tube type, bent pipe type, serpentine pipe type, profile and friction stir welding combination type, machining and welding combination type, plate water distribution strip type, welding and buried pipe combination type, and press pipe type. These liquid cooling channels are usually arranged inside the battery pack or between the battery packs. Although this arrangement can play a certain heat dissipation effect, it often has problems such as low heat dissipation efficiency, uneven heat dissipation, and waste of battery space. In addition, in order to avoid leakage of the cooling liquid, the existing liquid cooling device usually needs to be equipped with a complex liquid cooling connection assembly, which makes the assembly and maintenance more complex, and once a problem occurs, the difficulty of repair and replacement is also increased accordingly. Therefore, how to further optimize the battery heat dissipation and simplify the liquid cooling connection assembly has become an important direction of current research.

[0005] A possible improvement scheme is to arrange the liquid cooling channel inside the battery core rod. However, this design is not easy to implement. On the one hand, the liquid cooling channel arranged inside the core rod may affect its carrying performance; on the other hand, in order to improve the heat dissipation effect, the design of the internal flow channel may sacrifice part of the capacity density of the battery. In addition, the liquid cooling connection assembly connecting the liquid cooling channel arranged inside the core rod needs to be further optimized to reduce the pressure of the cooling liquid on the flow channel and simplify the connection with the external power source. Therefore, there is an urgent need to develop a new type of liquid cooling device to improve the heat dissipation efficiency, reduce the complexity, and ensure the overall performance and safety of the battery. SUMMARY

[0006] In view of the problems existing in the prior art, the application provides a liquid cooling device special for a storage battery, which is characterized in that a liquid cooling channel is arranged in a core rod, and a liquid cooling connection assembly cooperating with the liquid cooling core rod is designed according to the structure of the liquid cooling channel in the core rod, so that the heat dissipation performance of the liquid cooling device is improved, the bearing capacity of the liquid cooling core rod is optimized, the complexity of the connection of the liquid cooling device is simplified, and a liquid cooling device with high heat dissipation capacity, high stability and easy connection is obtained.

[0007] The liquid cooling device comprises a liquid cooling core rod and a liquid cooling connection assembly, and a liquid cooling channel is arranged in the liquid cooling core rod.

[0008] The inlet and outlet of the liquid cooling channel are located at the lower end of the liquid cooling core rod, and the liquid cooling connection assembly is connected to the liquid cooling core rod through a battery shell.

[0009] The liquid cooling connection assembly comprises a liquid storage cabin and a liquid cooling plug, the liquid storage cabin is provided with a liquid inlet and a liquid outlet connected to the liquid cooling core rod, and the liquid storage cabin is provided with the liquid cooling plug on both sides for connecting an external liquid circulation pipeline.

[0010] The uplink liquid cooling channel and the downlink liquid cooling channel are connected to each other through a turning cavity.

[0011] As a further scheme, the lower end of the liquid cooling core rod is provided with a core rod connecting hole.

[0012] As a further scheme, the liquid cooling core rod is internally provided with a main support beam parallel to the central axis of the liquid cooling core rod and branch support beams, the main support beam is arranged at the central axis of the liquid cooling core rod, the branch support beams are parallel to the main support beam, the branch support beams are uniformly distributed on both sides of the main support beam, and the main support beam and the branch support beams are fixedly connected to the lower end of the liquid cooling core rod.

[0013] As a further scheme, the ratio of the sum of the widths of the main support beam and the branch support beams to the total width of the liquid cooling core rod is greater than 0.4.

[0014] As a further scheme, the ratio of the sum of the widths of the main support beam and the branch support beams to the total width of the liquid cooling core rod is greater than 0.45.

[0015] As a further scheme, the ratio of the width of the main support beam to the total width of the liquid cooling core rod is greater than 0.05.

[0016] As a further scheme, the ratio of the width of the main support beam to the total width of the liquid cooling core rod is selected from 0.05-0.08.

[0017] As a further scheme, the ratio of the width of the main support beam to the total width of the liquid cooling core rod is greater than 0.05.

[0018] As a further solution, the ratio between the main support strut length and the split support strut length is selected from 1.5-1.8.

[0019] As a further solution, the main support strut length is equal to the split support strut length.

[0020] As a further solution, the ratio between the main support strut length and the liquid cooling rod length is selected from 0.75-0.85.

[0021] As a further solution, the ratio between the main support strut length and the liquid cooling rod length is selected from 0.7-0.9.

[0022] The ratio between the liquid cooling tube and the main support strut width is selected from 1.5-2.5.

[0023] The ratio between the liquid cooling tube and the main support strut width is selected from 1.8-2.2.

[0024] As a further solution, the split support strut is selected from 2-7.

[0025] As a further solution, the ratio between the liquid cooling channel and the total liquid cooling rod width is greater than 0.5.

[0026] As a further solution, the liquid cooling rod wall thickness is greater than 0.5mm.

[0027] As a further solution, the ratio between the liquid cooling channel and the total liquid cooling rod width is selected from 0.5-0.7.

[0028] As a further solution, the liquid cooling rod wall thickness is greater than 0.8mm.

[0029] The liquid cooling rod further comprises a first insulation sealing element and a second sealing assembly.

[0030] As a further solution, the first insulation sealing element is fixedly connected to the upper end of the liquid cooling rod, and the second sealing assembly is detachably connected to the lower end of the liquid cooling rod.

[0031] As a further solution, the second sealing assembly comprises a sealing liquid inlet, a sealing liquid outlet, and a second fixing hole.

[0032] As a further solution, the sealing liquid inlet and the sealing liquid outlet are respectively matched with the liquid inlet and the liquid outlet of the liquid cooling rod.

[0033] As a further solution, the second fixing hole is matched with the rod connecting hole.

[0034] As a further solution, the liquid storage cabin comprises a liquid inlet storage cabin and a liquid outlet storage cabin.

[0035] As a further solution, the volume ratio of the liquid inlet storage tank to the liquid outlet storage tank is equal to the ratio between the sum of the flow rates of the uplink liquid cooling channels and the sum of the flow rates of the downlink liquid cooling channels.

[0036] As a further solution, the liquid inlet of the storage tank is arranged in the liquid inlet storage tank and communicates with the liquid inlet of the liquid cooling core rod.

[0037] As a further solution, the liquid outlet of the storage tank is arranged in the liquid outlet storage tank and communicates with the liquid outlet of the liquid cooling core rod.

[0038] The liquid inlet storage tank is provided with a liquid inlet buffer platform.

[0039] The liquid outlet storage tank is provided with a liquid outlet buffer platform.

[0040] As a further solution, the liquid inlet of the storage tank is arranged on the liquid inlet buffer platform.

[0041] As a further solution, the liquid outlet of the storage tank is arranged on the liquid outlet buffer platform.

[0042] As a further solution, the storage tank further comprises a cover plate.

[0043] The liquid inlet buffer platform and the liquid outlet buffer platform are provided with storage tank fixing holes matched with the second fixing holes and the core rod connecting holes, and the liquid cooling core rod, the second sealing assembly and the storage tank are fixedly connected through the second fixing holes, the core rod connecting holes and the storage tank fixing holes.

[0044] As a further solution, the inner surfaces of the liquid inlet buffer platform and the liquid outlet buffer platform are provided with sealing grooves matched with the second sealing assembly, and the second sealing assembly is clamped in the sealing grooves.

[0045] As a further solution, the sealing grooves are further provided with chamfers around them.

[0046] As a further solution, the sealing grooves are provided with slot holes matched with the second sealing assembly.

[0047] As a further solution, the side plates of the liquid inlet storage tank and the liquid outlet storage tank are respectively provided with plug sockets matched with liquid cooling plugs.

[0048] As a further solution, the liquid cooling plug comprises a plug part, a plug flow channel, a clamping plate and a sealing ring.

[0049] As a further solution, the plug part is provided with an external liquid cooling connecting pipe connected with an external liquid cooling inlet.

[0050] As a further solution, the plug part is located at one end of the liquid cooling plug, the plug flow channel at least partially passes through the plug part, the clamping plate is arranged on both sides of the plug flow channel, and the sealing ring is arranged between the plug part and the clamping plate.

[0051] As a further solution, one side of the clamping plate is fixed on the plug flow channel, and an angle between the clamping plate and the plug flow channel is 15°-35°.

[0052] As a further solution, a groove matched with the clamping plate is arranged below the clamping plate.

[0053] As a further solution, a groove matched with the sealing ring is arranged between the clamping plate and the plug part.

[0054] Compared with the prior art, the present application has at least the following beneficial effects:

[0055] In the design of energy storage devices, the present application innovatively arranges a liquid cooling pipe inside the core rod, effectively solving the problem of overheating generated during high-rate charging and discharging and long-time cyclic use. This design enables the device to maintain good thermal stability during high-load operation, significantly prolongs the service life of the device and improves the overall performance. By combining thermal management with device performance optimization, the present application provides a new idea for the design of high-performance energy storage devices. In addition, the present application also designs a liquid cooling connection assembly matched with the liquid cooling pipe inside the core rod, adopts an innovative slow-flow tank structure to ensure the uniform flow rate of the cooling liquid in the multi-flow channel, thereby improving the efficiency and reliability of the system. In order to further improve the practicability of the system, the present application introduces a detachable liquid cooling quick plug design, making the connection of internal and external liquid cooling devices simple and convenient. This improvement simplifies the connection complexity and maintenance difficulty in traditional liquid cooling devices, enhancing the operability and maintenance convenience of the entire system. In summary, these innovative designs not only optimize the thermal management of energy storage devices, but also improve their overall performance, laying a foundation for future efficient and reliable energy storage solutions. BRIEF DESCRIPTION OF DRAWINGS

[0056] The accompanying drawings, which form a part of this application, are included to provide a further understanding of the application and are incorporated in and constitute a part of this application. The embodiments of the application illustrated in the drawings are provided to explain embodiments of the application and not to limit the application.

[0057] In the drawings:

[0058] Figure 1 is a perspective view of the liquid cooling device, and the dashed part is an internal invisible structure;

[0059] Figure 2 is a longitudinal sectional view of the liquid cooling core rod 1;

[0060] Figure 3 is a top view of the second sealing assembly 15;

[0061] Figure 4 This is a structural diagram of liquid storage tank 2 (without cover plate 28).

[0062] Figure 5 Here is a structural diagram of cover plate 28;

[0063] Figure 6 This is a longitudinal cross-sectional view of a battery equipped with a liquid cooling system, where the portion highlighted by the dashed line is shown below. Figure 6 ;

[0064] Figure 7 for Figure 5 Enlarged view of the area selected by the dashed line;

[0065] Figure 8 This is a cross-sectional view of the liquid cooling connector.

[0066] Wherein, 1-liquid-cooled core rod; 11-liquid-cooling channel; 111-upward liquid-cooling channel; 112-downward liquid-cooling channel; 12-liquid inlet; 13-liquid outlet; 14-first insulating seal; 15-second sealing assembly; 151-sealed liquid inlet; 152-sealed liquid outlet; 153-second fixing hole; 16-core rod connecting hole; 17-positioning hole; 18-main support rib; 19-sub-support rib; 2-liquid storage tank; 2 1-Liquid inlet of storage tank; 22-Liquid outlet of storage tank; 23-Liquid inlet storage tank; 24-Liquid outlet storage tank; 25-Liquid inlet flow platform; 26-Liquid outlet flow platform; 27-Plug socket; 28-Cover plate; 29-Liquid tank fixing hole; 3-Liquid cooling plug; 31-Plug part; 32-Plug flow channel; 33-Clamping plate; 34-Sealing ring; 35-External liquid cooling connection pipe; 4-Sealing groove; 41-Chamfer; 42-Groove. Detailed Implementation

[0067] For ease of understanding, the present invention will be described more fully below, and embodiments of the present invention will be given, but this does not limit the scope of the present invention.

[0068] This invention provides a liquid cooling device, such as... Figures 1-7 The system includes a liquid-cooled core rod 1 and a liquid-cooled connecting assembly. A liquid-cooled channel 11 is provided inside the liquid-cooled core rod 1. The liquid-cooled channel 11 includes an upward liquid-cooled channel 111 and a downward liquid-cooled channel 112 that are parallel to the central axis of the liquid-cooled core rod. The outlet of the upward liquid-cooled channel 111 is connected to the inlet of the downward liquid-cooled channel 112.

[0069] The liquid inlet 12 and liquid outlet 13 of the liquid cooling channel 11 are located at the lower end of the liquid cooling core rod 1, and the liquid cooling connection assembly is connected to the liquid cooling core rod 1 through the battery housing;

[0070] The liquid cooling connection assembly comprises a liquid storage cabin 2 and a liquid cooling plug 3.

[0071] To further improve the heat dissipation effect of the battery liquid cooling device, the liquid cooling channel 11 is arranged in the battery core rod, the cooling liquid is directly guided to the battery core area through the liquid cooling channel 11, and the overheating problem caused by high-rate charging and discharging and long-time cycle use is effectively solved.

[0072] The uplink liquid cooling channel 111 and the downlink liquid cooling channel 112 are connected to each other through a turning cavity.

[0073] As some exemplary examples, the lower end of the liquid cooling core rod 1 is provided with a core rod connecting hole 16.

[0074] As some exemplary examples, the liquid cooling core rod 1 is internally provided with a main support rib 18 parallel to the central axis of the liquid cooling core rod 1 and a branch support rib 19, wherein the main support rib 18 is arranged at the central axis position of the liquid cooling core rod 1, the branch support rib 19 is parallel to the main support rib 18, the branch support ribs 19 are uniformly distributed on both sides of the main support rib 18, and the main support rib 18 and the branch support rib 19 are fixedly connected to the lower end of the liquid cooling core rod 1.

[0075] As some exemplary examples, the ratio of the sum of the widths of the main support ridge 18 and the sub support ridge 19 to the total width of the liquid cooling rod 1 is greater than 0.4.

[0076] As some exemplary examples, the ratio of the sum of the widths of the main support ridge 18 and the sub support ridge 19 to the total width of the liquid cooling rod 1 is greater than 0.45.

[0077] The ratio of the width of the main support ridge 18 to the total width of the liquid cooling rod 1 is greater than 0.05.

[0078] As some exemplary examples, the ratio of the width of the main support ridge 18 to the total width of the liquid cooling rod 1 is selected from 0.05-0.08.

[0079] As some exemplary examples, the ratio of the width of the main support ridge 18 to the sub support ridge 19 is greater than 1.5. Setting the ratio of the width of the main support ridge 18 to the sub support ridge 19 to be greater than 1.5 helps to better exert the support effect of the main support ridge 18, improve the carrying capacity of the liquid cooling rod 1, and optimize the internal pressure distribution of the liquid cooling rod 1, dispersing the impact force brought by the cooling liquid.

[0080] As some exemplary examples, the ratio of the width of the main support ridge 18 to the sub support ridge 19 is selected from 1.5-1.8.

[0081] As some exemplary examples, the length of the main support ridge 18 is equal to the length of the sub support ridge 19.

[0082] As some exemplary examples, the ratio of the length of the main support ridge 18 to the length of the liquid cooling rod 1 is selected from 0.75-0.85.

[0083] As some exemplary examples, the ratio of the length of the main support ridge 18 to the length of the liquid cooling rod 1 is selected from 0.7-0.9.

[0084] The ratio of the width of the liquid cooling pipe 11 to the main support ridge 18 is selected from 1.5-2.5.

[0085] The ratio of the width of the liquid cooling pipe 11 to the main support ridge 18 is selected from 1.8-2.2.

[0086] As some exemplary examples, the sub support ridge 19 is selected from 2-7. This helps to further improve the heat dissipation area of the liquid cooling device and improve the carrying capacity of the liquid cooling rod 1.

[0087] As some exemplary examples, the ratio of the liquid cooling channel 11 to the total width of the liquid cooling rod 1 is greater than 0.5.

[0088] As some exemplary examples, the wall thickness of the liquid cooling rod 1 is greater than 0.5mm.

[0089] As a further solution, the ratio between the liquid cooling channel 11 and the total width of the liquid cooling rod 1 is selected from 0.5-0.7.

[0090] As some exemplary examples, the wall thickness of the liquid cooling rod 1 is greater than 0.8mm.

[0091] The liquid cooling rod 1 further comprises a first insulation seal 14 and a second seal assembly 15.

[0092] As some exemplary examples, the first insulation seal 14 is fixedly connected to the upper end of the liquid cooling rod 1, and the second seal assembly 15 is detachably connected to the lower end of the liquid cooling rod 1.

[0093] As some exemplary examples, the second seal assembly 15 comprises a sealed liquid inlet 151, a sealed liquid outlet 152, and a second fixed hole 153.

[0094] As some exemplary examples, the sealed liquid inlet 151 and the sealed liquid outlet 152 are respectively matched with the liquid inlet 12 and the liquid outlet 13 of the liquid cooling rod 1.

[0095] As some exemplary examples, the second fixed hole 153 is matched with the rod connecting hole 16.

[0096] As some exemplary examples, the liquid storage cabin 2 comprises a liquid inlet storage cabin 23 and a liquid outlet storage cabin 24.

[0097] As some exemplary examples, the volume ratio of the liquid inlet storage cabin 23 to the liquid outlet storage cabin 24 is equal to the ratio between the total flow rate of the upward liquid cooling channel 111 and the total flow rate of the downward liquid cooling channel 112. This helps to ensure the fluid balance of the liquid cooling device, alleviate the pressure on the liquid cooling rod 1, maintain stable cooling effect, and thus improve the overall heat dissipation efficiency.

[0098] As some exemplary examples, the liquid storage cabin liquid inlet 21 is arranged in the liquid inlet storage cabin 23 and is communicated with the liquid inlet 12 of the liquid cooling rod 1.

[0099] As some exemplary examples, the liquid storage cabin liquid outlet 22 is arranged in the liquid outlet storage cabin 24 and is communicated with the liquid outlet 13 of the liquid cooling rod 1.

[0100] The liquid inlet storage cabin 23 is provided with a liquid inlet buffer platform 25, and the liquid outlet storage cabin 24 is provided with a liquid outlet buffer platform 26.

[0101] The design of the liquid inlet buffer platform 25 and the liquid outlet buffer platform 26 aims to optimize the flow path of the cooling liquid. By guiding the flow of the cooling liquid inside the buffer cavity, this setting can slow down the flow rate of the liquid and promote its uniform distribution, thereby significantly improving the heat exchange efficiency and ensuring the uniformity and stability of the battery temperature. In addition, the structure of the buffer platform also effectively reduces the hydraulic impact, reduces the impact force and noise on the buffer cavity, thereby prolonging the service life of the assembly.

[0102] As some exemplary examples, the liquid inlet of the liquid storage tank 21 is arranged on the liquid inlet buffer platform 25.

[0103] As some exemplary examples, the liquid outlet of the liquid storage tank 22 is arranged on the liquid outlet buffer platform 26.

[0104] As some exemplary examples, the liquid storage tank 2 further comprises a cover plate 28.

[0105] The liquid inlet buffer platform 25 and the liquid outlet buffer platform 26 are provided with liquid storage tank fixing holes 29 matched with the second fixing hole 153 and the core rod connecting hole 16, and the liquid cooling core rod 1, the second sealing assembly 15 and the liquid storage tank 2 are fixedly connected through the second fixing hole 153, the core rod connecting hole 16 and the liquid storage tank fixing hole 29.

[0106] As some exemplary examples, the inner surface of the liquid inlet buffer platform 25 and the liquid outlet buffer platform 26 is provided with a sealing groove 4 matched with the second sealing assembly 15, and the second sealing assembly 15 is clamped in the sealing groove 4.

[0107] As some exemplary examples, the sealing groove 4 is further provided with a chamfer 41 around it. The design of the chamfer 41 helps to ensure that the liquid cooling core rod 1 winding the positive and negative electrode sheets and the diaphragm can automatically slide into the specified position during assembly, improving the efficiency and reliability of assembly.

[0108] As some exemplary examples, the sealing groove 4 is provided with a slot hole 42 matched with the second sealing assembly 15.

[0109] As some exemplary examples, the side plate bottom of the liquid inlet storage tank 23 and the liquid outlet storage tank 24 is respectively provided with a plug socket 27 matched with the liquid cooling plug 3.

[0110] As some exemplary examples, the liquid cooling plug 3 comprises a plug part 31, a plug flow channel 32, a clamping plate 33 and a sealing ring 34.

[0111] As some exemplary examples, the plug part 31 is provided with an external liquid cooling connecting pipe 35 connected to the external liquid cooling inlet.

[0112] As some exemplary examples, the plug part 31 is located at one end of the liquid-cooled plug 3, the plug flow channel 32 at least partially passes through the plug part 31, the clamping plate 33 is arranged on both sides of the plug flow channel 32, and the sealing ring 34 is arranged between the plug part 31 and the clamping plate 33.

[0113] As some exemplary examples, one side of the clamping plate 33 is fixed on the plug flow channel 32, and an angle between the clamping plate 33 and the plug flow channel 32 is 15°-35°.

[0114] As some exemplary examples, a groove matched with the clamping plate is arranged below the clamping plate 33.

[0115] As some exemplary examples, a groove matched with the sealing ring 34 is arranged between the clamping plate 33 and the plug part 31.

[0116] Embodiment 1

[0117] Aluminum foil is selected as the positive current collector layer, and the aluminum foil tab part is reserved. Lithium iron phosphate is selected as the positive active material coating. Copper foil is selected as the negative current collector layer, and the aluminum foil tab part is reserved. Graphite is selected as the negative active material. The battery core is obtained by winding the liquid-cooled core rod 1 in the stacking structure of separator-negative plate-separator-positive plate in a winding manner, wherein the tabs of the positive plate and the negative plate are on the same side during the winding process. The second sealing assembly 15 is placed in the sealing groove 4, and the liquid-cooled core rod 1, the second sealing assembly 15, and the battery shell are threadedly linked through the core rod connecting hole 16, the second fixing hole 153, and the liquid storage compartment fixing hole 29, so as to ensure that the liquid inlet liquid storage compartment 23 is in communication with the upward liquid cooling channel 111 of the liquid-cooled core rod 1, and the liquid outlet liquid storage compartment 24 is in communication with the downward liquid cooling channel 112. Subsequently, the top cover 28 is buckled into the liquid storage compartment 2, the top cover 28 and the liquid storage compartment 2 are laser welded, the assembly integrated with the cover plate is welded on the battery core, and the cover plate assembly and the battery shell are welded. Subsequently, the electrolyte is injected, and the liquid-cooled plug 3 is inserted into the plug port 27, respectively, to obtain a battery with a liquid cooling device.

[0118] The technical features of the above-described embodiments can be combined in any manner. To make the description concise, all possible combinations of the technical features in the above-described embodiments are not described, but it should be considered that any combination of the technical features is within the scope of the present disclosure. Although the embodiments of the present disclosure have been shown and described above, it should be understood that the above-described embodiments are exemplary and should not be construed as limiting the present disclosure, and those skilled in the art can modify, replace, substitute, and deform the above-described embodiments within the scope of the present disclosure. Furthermore, those skilled in the art can combine and combine the features of different embodiments or examples described in the present disclosure and different embodiments or examples.

Claims

1. A liquid cooling device, characterized in that, Includes a liquid-cooled core rod (1) and a liquid-cooled connection assembly; A liquid cooling channel (11) is provided inside the liquid-cooled core rod (1). The liquid cooling channel (11) includes an upward liquid cooling channel (111) and a downward liquid cooling channel (112) parallel to the central axis of the liquid-cooled core rod. The outlet of the upward liquid cooling channel (111) is connected to the inlet of the downward liquid cooling channel (112). The liquid inlet (12) and outlet (13) of the liquid cooling channel (11) are located at the lower end of the liquid cooling core rod (1); The liquid-cooled connection assembly is connected to the liquid-cooled core rod (1) through the battery housing; The liquid cooling connection assembly includes a liquid storage tank (2) and a liquid cooling plug (3). The liquid storage tank (2) is provided with a liquid storage tank inlet (21) and a liquid storage tank outlet (22) for connecting the liquid cooling core rod (1). The liquid cooling plug (3) is inserted into both sides of the liquid storage tank (2) for connecting the external liquid circulation pipeline.

2. The liquid cooling device according to claim 1, characterized in that, The upward liquid cooling channel (111) and the downward liquid cooling channel (112) are interconnected through a steering cavity; The lower end of the liquid-cooled core rod (1) is provided with a core rod connection hole (16); The ratio of the total width of the liquid cooling channel (11) to the total width of the liquid cooling core rod (1) is greater than 0.5; The wall thickness of the liquid-cooled mandrel (1) is greater than 0.5 mm.

3. The liquid cooling device according to claim 1, characterized in that, The ratio of the total width of the liquid cooling channel (11) to the total width of the liquid cooling core rod (1) is selected from 0.5-0.7; The wall thickness of the liquid-cooled core rod (1) is greater than 0.8 mm.

4. The liquid cooling device according to claim 1, characterized in that, The liquid-cooled core rod (1) also includes a first insulating seal (14) and a second sealing assembly (15); The first insulating seal (14) is fixedly connected to the upper end of the liquid-cooled core rod (1), and the second sealing assembly (15) is detachably connected to the lower end of the liquid-cooled core rod (1). The second sealing assembly (15) includes a sealing inlet (151), a sealing outlet (152), and a second fixing hole (153); The sealed liquid inlet (151) and sealed liquid outlet (152) are respectively matched with the liquid inlet (12) and liquid outlet (13) of the liquid-cooled core rod (1); The second fixing hole (153) mates with the mandrel connecting hole (16).

5. The liquid cooling device according to claim 1, characterized in that, The liquid storage tank (2) includes an inlet liquid storage tank (23) and an outlet liquid storage tank (24); The volume ratio of the inlet liquid storage tank (23) to the outlet liquid storage tank (24) is equal to the ratio between the total flow velocity of the upward liquid cooling channel (111) and the total flow velocity of the downward liquid cooling channel (112); The liquid inlet (21) of the liquid storage tank is located inside the liquid storage tank (23) and is connected to the liquid inlet (12) of the liquid cooling core rod (1); The liquid outlet (22) of the liquid storage tank is located inside the liquid outlet storage tank (24) and is connected to the liquid outlet (13) of the liquid-cooled core rod (1).

6. The liquid cooling device according to claim 5, characterized in that, The liquid inlet storage tank (23) is equipped with a liquid inlet slow flow platform (25); The liquid outlet storage tank (24) is equipped with a liquid outlet slow flow platform (26); The liquid inlet (21) of the storage tank is located on the liquid inlet slow flow platform (25); The liquid outlet (22) of the storage tank is located on the liquid outlet slow flow platform (26); The liquid storage tank (2) also includes a cover plate (28).

7. The liquid cooling device according to claim 6, characterized in that, The liquid inlet slow flow platform (25) and the liquid outlet slow flow platform (26) are provided with liquid storage tank fixing holes (29) that cooperate with the second fixing hole (153) and the core rod connection hole (16). The liquid-cooled core rod (1), the second sealing assembly (15), and the liquid storage tank (2) are fixedly connected through the second fixing hole (153), the core rod connection hole (16), and the liquid storage tank fixing hole (29).

8. The liquid cooling device according to claim 6, characterized in that, The inner surfaces of the liquid inlet slow flow platform (25) and the liquid outlet slow flow platform (26) are provided with sealing grooves (4) that cooperate with the second sealing component (15), and the second sealing component (15) is snapped into the sealing grooves (4); The sealing groove (4) is also provided with chamfers (41) around its perimeter; The sealing groove (4) is provided with a slot (42) that mates with the second sealing assembly (15).

9. The liquid cooling device according to claim 5, characterized in that, The bottom of the side plates of the liquid inlet storage tank (23) and the liquid outlet storage tank (24) are respectively provided with plug sockets (27) that cooperate with the liquid cooling plug (3).

10. The liquid cooling device according to claim 1, characterized in that, The liquid-cooled plug (3) includes a plug portion (31), a plug channel (32), a retaining plate (33), and a sealing ring (34); The plug portion (31) is located at one end of the liquid cooling plug (3), the plug channel (32) passes through the plug portion (31) at least partially, the retaining plate (33) is disposed on both sides of the plug channel (32), and the sealing ring (34) is disposed between the plug portion (31) and the retaining plate (33). The card plate (33) is fixed on one side of the plug channel (32), forming an angle of 15°-35° with the plug channel (32); The card plate (33) has a groove below it that mates with the card plate; The card plate (33) and the plug part (31) are provided with a groove that cooperates with the sealing ring (34).

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