Liquid cooling plate with dual-channel heat dissipation waterway and energy storage battery module
By designing a dual-channel heat dissipation water path in the liquid cooling plate, and setting folded flow channels and radiators at the inner and outer liquid inlets, the problem of insufficient heat absorption at the inlet is solved, achieving a more efficient and stable heat dissipation effect and reducing production costs.
Patent Information
- Application Number
- CN202410928865.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-11
- Publication Date
- 2025-12-30
AI Technical Summary
The existing liquid cooling plate does not absorb heat sufficiently at the water inlet, resulting in a large temperature difference and affecting the stability of heat dissipation.
The design features a liquid cooling plate with dual-channel heat dissipation channels, including an inner heat dissipation channel and an outer heat dissipation channel. Folded channels are provided at the inner and outer inlet ends, allowing the coolant to flow in a meandering manner at the inner and outer inlet ends. The coolant at a lower temperature fully absorbs heat at the inlet, and a radiator is installed in the channel for heat dissipation.
This improves the heat dissipation efficiency of the liquid cooling plate, reduces temperature differences, ensures the stability and uniformity of heat dissipation, and reduces production costs and processing difficulty.
Smart Images
Figure CN121238084A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of new energy battery technology, and more specifically, to a liquid cooling plate with a dual-channel heat dissipation water path and an energy storage battery module. Background Technology
[0002] Energy storage batteries are an important component of various outdoor electrical devices, such as electric vehicles. High-voltage power batteries generate a large amount of heat during operation. Therefore, a good heat dissipation system is crucial to ensuring the charging and discharging performance and lifespan of the power battery. Among the heat dissipation methods for energy storage batteries, liquid cooling plates are a key component of the thermal management system.
[0003] In existing liquid cooling plates, flow channels are usually opened on the base plate body for the cooling medium to flow through. At the inlet of each flow channel, the coolant flows directly into the flow channel. The residence time at the inlet is short, resulting in insufficient heat absorption at the inlet. This causes a large temperature difference in different areas of the liquid cooling plate, thus affecting the heat dissipation stability of the liquid cooling plate.
[0004] Therefore, existing technologies still need to be improved and developed. Summary of the Invention
[0005] The purpose of this application is to provide a liquid cooling plate with dual-channel heat dissipation water channels and an energy storage battery module, which solves the problem in the prior art that insufficient heat absorption at the water inlet leads to a large temperature difference in the liquid cooling plate and affects the heat dissipation stability of the liquid cooling plate.
[0006] To achieve the above objectives, the technical solution adopted in this application is as follows:
[0007] On the one hand, this application provides a liquid cooling plate with a dual-channel heat dissipation water channel, including: a liquid cooling base plate, on which a liquid inlet and a liquid outlet are provided;
[0008] The internal heat dissipation channel is set on the liquid cooling base plate and has an internal liquid inlet end, which is connected to the liquid inlet port.
[0009] An external heat dissipation channel is disposed on a liquid cooling plate and surrounds the outside of the inner heat dissipation channel. The external heat dissipation channel has an external liquid inlet end, which is connected to a liquid inlet.
[0010] The outer cover plate is connected to the liquid cooling base plate and covers the inner heat dissipation channel and the outer heat dissipation channel.
[0011] The inner liquid inlet end is provided with an inner opening folded flow channel, and the outer liquid inlet end is provided with an outer opening folded flow channel. The inner opening folded flow channel and the outer opening folded flow channel are used together to guide the coolant in the liquid inlet to the opposite sides, so that the coolant enters the inner liquid inlet end and the outer liquid inlet end respectively.
[0012] In an optional embodiment, the internal heat dissipation channel includes: an internal guide groove, the internal guide groove having an opening at each end in a first direction and a bottom surface of the groove;
[0013] A flow guide bar is set on the liquid cooling base plate and extends along the first direction inside the inner flow guide groove. The flow guide bar divides the open opening into an inner liquid inlet end and an inner liquid outlet end, and divides the inner flow guide groove into a water inlet guide groove and a water outlet guide groove. The end of the flow guide bar away from the open opening is spaced apart from the bottom surface of the groove to form a communication port.
[0014] The internal radiator is installed in the inlet and outlet water guide channels.
[0015] In an optional embodiment, a snap-fit groove is provided on the side wall of the liquid-cooled base plate;
[0016] The flow guide bar includes a locking block and a stop block. The locking block is used to engage with the locking groove, and the stop block is connected to the locking block and extends from the opening toward the bottom of the groove in a first direction.
[0017] In an optional embodiment, the external heat dissipation channel includes: a U-shaped water channel, the U-shaped water channel including a first longitudinal DC groove and a second longitudinal DC groove formed on the liquid cooling base plate, and a transverse DC groove connected to the end of the first longitudinal DC groove and the end of the second longitudinal DC groove, one end of the first longitudinal DC groove forming an external liquid inlet end, one end of the second longitudinal DC groove forming an external liquid outlet end, the first longitudinal DC groove and the second longitudinal DC groove both extending along a first direction, and the transverse DC groove extending along a second direction, wherein the first direction is perpendicular to the second direction;
[0018] External radiator, which is installed in the U-shaped water channel.
[0019] In an optional embodiment, the external heat sink includes: a first linear external heat sink, which is disposed in a first longitudinal DC groove and covers the first longitudinal DC groove along a second direction;
[0020] The second linear external heat dissipation part is disposed in the second longitudinal DC groove and is spread along the second direction to cover the second longitudinal DC groove.
[0021] In an optional embodiment, the first straight external heat dissipation part is provided with a first inclined side surface at one end facing the transverse DC slot;
[0022] The second straight external heat dissipation part has a second inclined side surface at one end facing the horizontal DC slot;
[0023] The inner distance between the first inclined side and the second inclined side is less than the outer distance.
[0024] In an optional embodiment, a third straight external heat dissipation part is also provided in the U-shaped water channel, and the third straight external heat dissipation part is provided in the transverse DC groove.
[0025] In an optional embodiment, the inner opening folded flow channel and the outer opening folded flow channel are arranged in a mirror-symmetric manner.
[0026] The internally open folded flow channel includes: a liquid inlet guide channel, which is used to guide the coolant entering the liquid-cooled base plate;
[0027] The first directional channel extends along the first direction, and the first end of the first directional channel is connected to the end of the liquid inlet guide channel.
[0028] The second directional channel extends along the first direction, with its first end connected to the end of the first directional channel and its end connected to the inlet guide channel.
[0029] In an optional embodiment, a third linear heat dissipation part is provided in the first deflection slot, and a fourth linear heat dissipation part is provided in the second deflection slot.
[0030] On the other hand, this application also proposes an energy storage battery module, including an energy storage battery assembly and a liquid cooling plate with a dual-channel heat dissipation water channel as described above.
[0031] The energy storage battery assembly is connected to a liquid cooling plate with a dual-channel heat dissipation water path.
[0032] The beneficial effects of the liquid cooling plate with dual-channel heat dissipation water path and the energy storage battery module provided in this application are at least as follows: By setting an inner-opening folded flow channel in the inner liquid inlet and an outer-opening folded flow channel in the outer liquid inlet, the coolant in the inlet is guided to opposite sides by the inner and outer folded flow channels. Simultaneously, the coolant flowing into the inlet can meander between the inner and outer liquid inlet, allowing the coolant at a lower temperature to fully absorb heat at the inlet of the liquid cooling plate, thus preventing rapid outflow in that area and avoiding large temperature differences in different areas of the liquid cooling plate, which would affect the heat dissipation stability of the liquid cooling plate. Furthermore, the inner and outer heat dissipation flow channels, compared to a serpentine (S-shaped) flow channel, not only have smaller turning angles but also significantly fewer bends. The flow is further enhanced by heat dissipation through a radiator, which effectively divides the inner and outer heat dissipation flow channels into multiple small channels surrounding the entire liquid cooling plate. This allows the coolant within the entire liquid cooling plate to be distributed throughout the plate, thereby enabling the coolant to fully absorb heat and carry away more heat, thus improving heat dissipation efficiency. Attached Figure Description
[0033] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0034] Figure 1 A schematic diagram of a liquid cooling plate with a dual-channel heat dissipation water path provided in an embodiment of this application;
[0035] Figure 2 An exploded view of a liquid cooling plate with a dual-channel heat dissipation water path provided in an embodiment of this application;
[0036] Figure 3 A schematic diagram of the structure of a liquid cooling plate with dual-channel heat dissipation water path after removing the outer cover plate, provided for an embodiment of this application;
[0037] Figure 4 This is a schematic diagram of the internal heat dissipation channel of a liquid cooling plate with a dual-channel heat dissipation water path according to an embodiment of this application.
[0038] Figure 5 for Figure 4 Enlarged view of point A;
[0039] Figure 6 This is an exploded view of the internal heat dissipation channel of a liquid cooling plate with a dual-channel heat dissipation water path according to an embodiment of this application.
[0040] Figure 7 This is an exploded view of a liquid cooling base plate of a liquid cooling plate with dual-channel heat dissipation water channels according to an embodiment of this application;
[0041] Figure 8 An exploded view of the first structure of the external heat dissipation channel of a liquid cooling plate with a dual-channel heat dissipation water path according to an embodiment of this application;
[0042] Figure 9 This is a schematic diagram of the first structure of the external heat dissipation channel section of a liquid cooling plate with a dual-channel heat dissipation water path according to an embodiment of this application after removing the outer cover plate.
[0043] Figure 10 An exploded view of a second structure of the external heat dissipation channel portion of a liquid cooling plate with a dual-channel heat dissipation water path, according to an embodiment of this application.
[0044] Figure 11 This is a schematic diagram of the second structure of the external heat dissipation channel of a liquid cooling plate with a dual-channel heat dissipation water path according to an embodiment of this application.
[0045] Figure 12This is a schematic diagram of another form of the second structure of a liquid cooling plate with a dual-channel heat dissipation water path according to an embodiment of this application.
[0046] The following are the labeling elements in the figure:
[0047] 10. Liquid-cooled base plate; 1010. Liquid inlet; 1020. Liquid outlet; 100. Internal heat dissipation channel section; 1110. Side plate; 1111. Snap-fit groove; 1112. Flat bottom plate; 1120. U-shaped water baffle frame; 1130. Internal guide groove; 1131. Opening; 1132. Tank bottom surface; 1133. Water inlet guide groove; 1134. Water outlet guide groove; 1135. Internal liquid inlet end; 1136. Internal liquid outlet end; 140. Connecting port; 1150. Buffer space; 1160. Internally opened folded flow channel; 1161. Liquid inlet guide channel; 1162. First deflection channel; 1163. Second deflection channel; 1200. Flow guide bar; 1210. Locking block; 1220. Stop block; 1400. Internal radiator; 1410. First straight internal heat dissipation section; 1411. First internal inclined side; 1420. Second straight internal heat dissipation section; 142 1. Second inner inclined side; 1430. Third straight heat dissipation section; 1440. Fourth straight heat dissipation section; 200. External heat dissipation flow channel section; 2110. First longitudinal direct current channel; 2111. External liquid inlet end; 2120. Second longitudinal direct current channel; 2121. External liquid outlet end; 2130. Transverse direct current channel; 2400. External radiator; 2410. First external straight heat dissipation section; 2411. First external inclined side; 2420. Second external straight heat dissipation section; 2421. Second external inclined side; 2430. Third external straight heat dissipation section; 2431. First interval space; 2432. Second interval space; 2433. Second chamfer; 2434. First heat dissipation segment component; 2435. Second heat dissipation segment component; 2500. Externally open folded flow channel; 301. Upper heat dissipation plate; 302. Vertical plate; 303. Lower heat dissipation plate; 20. Outer cover plate. Detailed Implementation
[0048] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.
[0049] It should be noted that when a component is referred to as "fixed to" or "set on" another component, it may be directly or indirectly located on that other component. When a component is referred to as "connected to" another component, it may be directly or indirectly connected to that other component. The terms "upper," "lower," "left," "right," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate orientations or positions based on the accompanying drawings, and are for ease of description only, and should not be construed as limiting the technical solution. The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features. "A plurality" means two or more, unless otherwise explicitly defined.
[0050] Please see Figure 1 This embodiment proposes a liquid cooling plate with a dual-channel heat dissipation system, which can be used to dissipate heat from energy storage battery modules, thereby ensuring that the energy storage battery modules do not overheat during use and guaranteeing their high performance and safety. Typically, the liquid cooling plate adopts a roughly square structure, such as a rectangle. The direction along the longer side is designated as the first direction, and the direction along the wider side is designated as the second direction; the first direction and the second direction are perpendicular. For ease of structural description, the first direction is the front-to-back direction, and the second direction is the left-to-right direction.
[0051] like Figure 1 , Figure 2 , Figure 3 As shown, the liquid cooling plate with dual-channel heat dissipation mainly includes: a liquid cooling base plate, an inner heat dissipation channel, an outer heat dissipation channel, and an outer cover plate. An inlet and an outlet are provided on the liquid cooling base plate; as shown... Figure 2 , Figure 3The liquid-cooled base plate shown has inlet and outlet ports located on the same side of its perimeter, for example, both on the front. This facilitates the installation of external coolant connection pipes, enabling efficient assembly of energy storage battery modules in new energy vehicles and other electrical appliances. An inner heat dissipation channel is located on the liquid-cooled base plate and has an inner inlet end connected to the inlet port. An outer heat dissipation channel is located on the liquid-cooled base plate and surrounds the outer side of the inner heat dissipation channel, also having an outer inlet end connected to the inlet port. An outer cover plate is connected to the liquid-cooled base plate and covers both the inner and outer heat dissipation channels. In a specific structure, the outer cover plate can also be a square cover plate, detachably connected to the liquid-cooled base plate. When fixed to the liquid-cooled base plate, the outer cover plate covers both the inner and outer heat dissipation channels, closing the open sides of the liquid-cooled base plate to form a cooling water path for coolant flow. An inner-opening folded flow channel is provided in the inner liquid inlet end, and an outer-opening folded flow channel is provided in the outer liquid inlet end. The inner-opening folded flow channel and the outer-opening folded flow channel are used together to guide the coolant in the liquid inlet to the opposite sides, so that the coolant enters the inner liquid inlet end and the outer liquid inlet end respectively.
[0052] The working principle of the liquid cooling plate with dual-channel heat dissipation water path provided in this embodiment is as follows: By setting an inner-opening folded flow channel in the inner liquid inlet end and an outer-opening folded flow channel in the outer liquid inlet end, the inner and outer opening folded flow channels guide the coolant in the inlet to opposite sides. Simultaneously, the coolant entering the inlet flows meanderingly between the inner and outer liquid inlet ends, allowing the coolant at a lower temperature to fully absorb heat at the inlet of the liquid cooling plate, thus preventing rapid outflow in this area and avoiding large temperature differences in different areas of the liquid cooling plate, which would affect the heat dissipation stability of the liquid cooling plate. Furthermore, the inner and outer heat dissipation flow channels, compared to a serpentine (S-shaped) flow channel, not only have smaller turning angles but also significantly fewer bends. During the flow, heat is dissipated through the radiator, which effectively divides the inner and outer heat dissipation flow channels into multiple small channels surrounding the entire liquid cooling plate. This allows the coolant within the entire liquid cooling plate to be distributed throughout the plate, thereby enabling the coolant to fully absorb heat and carry away more heat, thus improving heat dissipation efficiency.
[0053] like Figure 2 , Figure 3 , Figure 4 As shown, further, the internal heat dissipation channel section of this embodiment includes: an internal flow guide groove, flow guide strips, and an internal heat sink. An internal flow guide groove 1130 is provided on the liquid-cooled base plate 10, and the internal flow guide groove 1130 has an open opening 1131 located at both ends in the first direction and a groove bottom surface 1132. For example... Figure 2 , Figure 6As shown, in the specific structure, the liquid-cooled base plate 10 can be formed by splicing. Baffle plates 1110 are fixed (welded, screwed or riveted) at the four edges of the flat base plate 1112. The baffle plates 1110 on the front and rear sides and the baffle plates 1110 on the left and right sides form a chamber for the flow of coolant. A U-shaped water baffle frame 1120 is set in the middle position of the chamber in the left and right direction. The U-shaped water baffle frame 1120 can also be fixed to the flat base plate 1112 by welding, screwing or riveting. In this way, the U-shaped water baffle frame 1120 forms an inner guide channel 1130. The opening of the U-shaped water baffle frame 1120 faces the front baffle plate 1110 and can form a gap with the baffle plate 1110, thereby forming the opening 1131 of the inner guide channel 1130. The inner bottom surface of the U-shaped water baffle frame 1120 forms the bottom surface 1132 of the channel. Since the edge baffles 1110 and U-shaped water baffles 1120 at the four edges are all machined parts, they are then installed on the flat bottom plate 1112 to form the liquid-cooled bottom plate 10. The cavity structure formed in this way does not require excessive machining of the liquid-cooled bottom plate 10, especially not sheet metal or stamping of the flow channels on the liquid-cooled bottom plate 10. This can ensure the assembly accuracy and dimensional tolerance requirements of the liquid-cooled bottom plate 10. The flow guide strip 1200 is set on the liquid-cooled bottom plate 10 and extends along the first direction within the inner flow guide groove 1130. The flow guide strip 1200 divides the open opening 1131 into an inner liquid inlet end 1135 and an inner liquid outlet end 1136, and divides the inner flow guide groove 1130 into a water inlet guide groove 1133 and a water outlet guide groove 1134. The end of the flow guide strip 1200 away from the open opening 1131 is spaced apart from the bottom surface 1132 of the groove to form a connecting opening 1140. In the specific structure, a guide strip 1200 forms an inlet guide channel 1133 and an outlet guide channel 1134 in the inner cavity. The inlet guide channel 1133 connects to the liquid inlet 1010, and the outlet guide channel 1134 connects to the liquid outlet 1020. Coolant can enter through the inlet guide channel 1133 and then pass through the outlet guide channel 1134, thus forming a folded water channel and increasing the coolant flow path. The inner guide channel 1130 is covered by an outer cover plate 20, and the inner radiator 1400 is disposed in the inlet guide channel 1133 and the outlet guide channel 1134. In the specific structure, the inner radiator 1400 is detachably disposed in the inner heat dissipation channel section. The inner radiator 1400 can adopt various structures, mainly used to divide the inner heat dissipation channel section into multiple small channels arranged in a ring. The coolant flows through these small channels along the path from the inlet guide channel 1133 to the outlet guide channel 1134.
[0054] In this embodiment, the internal heat dissipation channel is formed by opening an internal guide groove 1130 on the liquid-cooled base plate 10 and closing the open side of the internal guide groove 1130 on the liquid-cooled base plate 10 with an outer cover plate 20. A guide strip 1200 is installed inside the internal guide groove 1130, thereby dividing the internal guide groove 1130 into an inlet guide groove 1133 and an outlet guide groove 1134. During heat dissipation, the coolant can enter from the inlet guide groove 1133 and then pass through the outlet guide groove 1134, thus forming a folded water path (similar to a U-shape). During heat dissipation, the coolant can enter from the inlet guide groove and then pass through the outlet guide groove, thus forming a water path with a bend. Compared to traditional S-shaped or serpentine water paths, this water path structure effectively reduces the number of bends, has lower flow resistance, and higher heat transfer efficiency. Furthermore, the internal radiator 1400 is directly installed in the inlet guide channel 1133 and the outlet guide channel 1134. The internal radiator 1400 is pre-processed, and the spacing of the heat dissipation teeth can be flexibly designed according to design needs, allowing for greater design freedom. The internal radiator is directly housed in the inlet guide channel 1133 and the outlet guide channel 1134 and is integrated with the base plate and cover plate by welding or bonding. The pre-processed internal radiator 1400 is externally processed before the assembly of the energy storage battery liquid cooling plate, thus eliminating the need for sheet metal or stamping to create flow channels on the liquid cooling base plate 10. This reduces the number of machining steps on the liquid cooling base plate 10 and eliminates the need for stamping dies, thereby reducing processing costs. During the installation of the internal radiator 1400, virtually no additional shaping is required, saving assembly time and improving assembly efficiency while achieving efficient cooling and heat dissipation. Therefore, the liquid cooling plate of this embodiment achieves efficient cooling and heat dissipation while reducing production costs and improving production efficiency.
[0055] like Figure 4 , Figure 5 As shown, the internal heat sink 1400 of this embodiment further includes: an upper heat sink 301 and a lower heat sink 303 staggered together, and vertical plates 302 connected between the upper heat sink 301 and the lower heat sink 303 respectively. For example, the structure of the first straight internal heat sink 1410 is as follows: in the second direction, one end of the lower heat sink 303 is vertically fixed to the vertical plate 302, the upper end of the vertical plate 302 is connected to the upper heat sink 301, one end of the upper heat sink 301 is vertically connected to the vertical plate 302, and the lower end of the vertical plate 302 is connected to the lower heat sink 303, and this arrangement is repeated continuously to form a long plate structure. This structure can be formed by stamping. Since the internal heat sink 1400 is pre-manufactured separately before the assembly of the liquid cooling plate of this energy storage battery, its direct use of stamping can improve production efficiency. When the internal heat sink 1400 is assembled onto the liquid cooling base plate 10, small flow channels can be formed between each vertical plate 302, increasing the contact area of the coolant and promoting heat dissipation. It is easy to imagine that the internal radiator 1400 can also adopt other traditional heat dissipation structures, which can also solve technical problems and achieve the technical effect of promoting heat dissipation.
[0056] like Figure 3 , Figure 6 , Figure 7 As shown, in this embodiment, the inner guide channel 1130 is a square channel, and the guide baffle 1200 is located on the center line of the second direction of the square channel. The inner guide channel 1130 is distinguished by the guide baffle 1200, and they are connected only at the rear end of the guide baffle 1200. A simple structure is used to achieve the folded flow of coolant, thereby improving the heat dissipation effect.
[0057] like Figure 2 , Figure 4 , Figure 5 As shown, in this embodiment, a snap-fit groove 1111 is further provided on the side wall of the liquid-cooled base plate 10. The flow guide strip 1200 includes a snap-fit block 1210 and a stop block 1220. The snap-fit block 1210 is used to snap into the snap-fit groove 1111, and the stop block 1220 is connected to the snap-fit block 1210 and extends along the first direction from the open opening 1131 toward the bottom surface 1132 of the groove. In the specific structure, the snap-fit groove 1111 is provided on the inner wall of the baffle plate 1110 at the front end of the liquid-cooled base plate 10, so that the flow guide strip 1200 can be fixed to the liquid-cooled base plate 10 by the snap-fit block 1210. This facilitates the docking and assembly of the flow guide strip 1200 and the liquid-cooled base plate 10, avoiding the problem of increasing the processing steps by directly machining the flow guide strip 1200 on the liquid-cooled base plate 10, which is beneficial to reducing costs and improving production efficiency.
[0058] like Figure 2 , Figure 4 , Figure 6 As shown, the internal radiator 1400 in this embodiment further includes a first linear internal heat dissipation section 1410 and a second linear internal heat dissipation section 1420. The internal radiator 1400 may include multiple parts, which facilitates assembly according to the shape of the flow channel. The first linear internal heat dissipation section 1410 is disposed in the inlet guide channel 1133 and fills the inlet guide channel 1133 along the second direction. The second linear internal heat dissipation section 1420 is disposed in the outlet guide channel 1134 and fills the outlet guide channel 1134 along the second direction. The internal radiator 1400 has high thermal conductivity. Through the high thermal conductivity of the internal radiator 1400, it is beneficial to conduct as much heat from the energy storage battery assembly as possible to the coolant, thereby facilitating heat dissipation. Furthermore, the internal radiator 1400 divides the inlet guide channel 1133 and the outlet guide channel 1134 into multiple small, circling flow channels. The coolant flows through these small channels along the path from the inlet guide channel 1133 to the outlet guide channel 1134. This effectively increases the heat transfer area of the coolant within the flow channels, resulting in more efficient heat dissipation.
[0059] like Figure 2 , Figure 4As shown, further, a buffer space 1150 is formed between one end of the first linear heat dissipation section 1410 facing the bottom surface 1132 of the tank and one end of the second linear heat dissipation section 1420 facing the bottom surface 1132 of the tank. In the specific structure, no other heat dissipation components are provided between the rear end of the first linear heat dissipation section 1410 and the rear end of the second linear heat dissipation section 1420, so that the rear end of the water inlet guide channel 1133 and the rear end of the water outlet guide channel 1134 form an empty mixing space. The coolant after being guided by the first linear heat dissipation section 1410 can mix in the mixing space, so that the heat of the mixed coolant is more uniform. The coolant with uniform temperature then flows into the second linear heat dissipation section 1420. In this way, the heat dissipation of the area covered by the second linear heat dissipation section 1420 is more uniform, avoiding local overheating and causing local battery safety problems.
[0060] like Figure 4 , Figure 6 As shown, in this embodiment, the first straight inner heat dissipation part 1410 is provided with a first inner inclined side surface 1411 at one end facing the bottom surface 1132 of the groove, and the second straight inner heat dissipation part 1420 is provided with a second inner inclined side surface 1421 at one end facing the bottom surface 1132 of the groove. The inner distance between the first inner inclined side surface 1411 and the second inner inclined side surface 1421 is smaller than the outer distance. The rear ends of the first straight inner heat dissipation section 1410 and the second straight inner heat dissipation section 1420, which are spaced apart in the left and right directions, guide the flow of coolant by setting inclined sides. Since the first inner inclined side 1411 and the second inner inclined side 1421 form a funnel shape, the outermost flow channel of the first straight inner heat dissipation section 1410 or the second straight inner heat dissipation section 1420 can guide the coolant to the outer area of the inlet guide channel 1133 or the outlet guide channel 1134. In this way, all parts in the cooling area can be covered by coolant, and the outer area of the liquid cooling base plate 10 can also be well covered and dissipated, ensuring the stability of heat dissipation.
[0061] like Figure 4 , Figure 6 As shown, the first inner inclined side 1411 and the second inner inclined side 1421 both extend to the end of the guide bar 1200. This allows the innermost flow channels of the closest adjacent first straight inner heat dissipation section 1410 and the second straight inner heat dissipation section 1420 to be unobstructed by the end of the guide bar 1200, resulting in smoother coolant flow and more thorough mixing of coolant temperatures in each flow channel.
[0062] like Figure 2 , Figure 3 , Figure 8As shown, further, the external heat dissipation channel of this embodiment includes a U-shaped water channel. Specifically, it includes a first longitudinal DC channel 2110 and a second longitudinal DC channel 2120 respectively formed on the left and right sides of the liquid-cooled base plate 10, and a transverse DC channel 2130 formed on the rear side of the liquid-cooled base plate 10. The transverse DC channel 2130 connects to the rear ends of the first longitudinal DC channel 2110 and the second longitudinal DC channel 2120. Therefore, the first longitudinal DC channel 2110 and the second longitudinal DC channel 2120 both extend in the front-rear direction, and the transverse DC channel 2130 extends in the left-right direction, and the three are connected to form a U-shaped channel structure. Figure 3 , Figure 9 As shown, one end of the first longitudinal DC channel 2110 forms an external liquid inlet 2111, and one end of the second longitudinal DC channel 2120 forms an external liquid outlet 2121. The external liquid inlet is connected to the liquid inlet 1010, and the external liquid outlet is connected to the liquid outlet 1020. The first longitudinal DC channel 2110, the second longitudinal DC channel 2120, and the transverse DC channel 2130 are connected to form a U-shaped water channel. The external radiator 2400 is disposed in the U-shaped water channel. The external radiator 2400 can adopt various structures, mainly used to divide the U-shaped water channel into multiple small flow channels arranged in a ring. The coolant flows through these small flow channels along the path from the first longitudinal DC channel 2110 to the transverse DC channel 2130 and then to the second longitudinal DC channel 2120.
[0063] A first longitudinal DC channel 2110 and a second longitudinal DC channel 2120 are respectively located on both sides in the second direction (left-right direction) on the liquid-cooled base plate 10, and a transverse DC channel 2130 is connected to the ends of the first longitudinal DC channel 2110 and the second longitudinal DC channel 2120. The first longitudinal DC channel 2110 and the second longitudinal DC channel 2120 are both perpendicular to the transverse DC channel 2130. When the outer cover plate 20 is covered, the outer cover plate 20 covers the first longitudinal DC channel 2110, the second longitudinal DC channel 2120, and the transverse DC channel 2130 to form a channel for coolant flow. An external radiator 2400 is installed in the U-shaped water channel. During the flow of coolant in the liquid-cooled base plate 10, it first passes through the first longitudinal DC channel 2110, then turns through the transverse DC channel 2130, and then turns again to enter the second longitudinal DC channel 2120, so that the flow channel is set around the liquid-cooled plate; compared with the serpentine flow channel, not only is the turning angle smaller, but the number of bends is also significantly reduced. Furthermore, the coolant is dissipated through the external radiator 2400 during the flow channel process. The external radiator 2400, within the U-shaped water channel, effectively divides the liquid cooling plate into multiple small channels surrounding it. This disperses the coolant throughout the liquid cooling plate, allowing it to fully absorb heat and remove more heat, thus improving heat dissipation efficiency. The external radiator 2400 further increases the contact area with the coolant, further enhancing heat dissipation efficiency and achieving high-performance heat dissipation for the liquid cooling plate. Moreover, since the external radiator 2400 in this embodiment is installed within the U-shaped water channel, during the formation of the liquid cooling plate's flow channel, only the larger first longitudinal direct current channel 2110, second longitudinal direct current channel 2120, and transverse direct current channel 2130 need to be produced. The required flow channel structure can then be formed by installing the external radiator 2400, improving assembly efficiency. The external radiator 2400 can be manufactured using extrusion or stamping processes, resulting in high production efficiency and simplifying the overall manufacturing process of the liquid cooling plate, making it more practical. The external radiator 2400 is manufactured separately and its specifications can be adjusted according to actual heat dissipation needs. By installing external radiators 2400 of different specifications into the U-shaped water channel, adjustments can be made according to actual heat dissipation requirements. The adjusted radiator can ensure uniform heat dissipation from the liquid cooling plate.
[0064] like Figure 8 , Figure 9 , Figure 10As shown, in this embodiment, the external heat sink 2400 specifically includes a first external linear heat sink 2410 and a second external linear heat sink 2420. The external heat sink 2400 may include multiple parts, which facilitates assembly according to the shape of the flow channel. The first external linear heat sink 2410 is disposed within the first longitudinal DC channel 2110 and fills the first longitudinal DC channel 2110 along the second direction. The second external linear heat sink 2420 is disposed within the second longitudinal DC channel 2120 and fills the second longitudinal DC channel 2120 along the second direction. The external heat sink 2400 has high thermal conductivity. Through the high thermal conductivity of the external heat sink 2400, it is beneficial to conduct as much heat from the energy storage battery assembly as possible to the coolant, thereby facilitating heat dissipation. Moreover, the external heat sink 2400 divides the U-shaped water channel into multiple small flow channels arranged in a ring. The coolant flows through these small flow channels along the path from the first longitudinal DC channel 2110 to the transverse DC channel 2130 and then to the second longitudinal DC channel 2120. It effectively increases the heat transfer area of the coolant in the flow channel, thus achieving more efficient heat dissipation.
[0065] like Figure 8 , Figure 9 As shown, in the first structural configuration, no other heat dissipation components are provided between the end of the first outer linear heat dissipation section 2410 and the end of the second outer linear heat dissipation section 2420, leaving the transverse DC channel 2130 empty. The coolant, after being guided by the first outer linear heat dissipation section 2410, can mix in the transverse DC channel 2130, making the heat of the mixed coolant more uniform. The uniformly heated coolant then flows into the second outer linear heat dissipation section 2420, thus making the heat dissipation of the area covered by the second outer linear heat dissipation section 2420 more uniform, avoiding local overheating that could lead to local battery safety issues.
[0066] like Figure 8 , Figure 9As shown, further, based on the first structure, the first outer linear heat dissipation part 2410 is provided with a first outer inclined side surface 2411 at one end facing the transverse DC groove 2130; the second outer linear heat dissipation part 2420 is provided with a second outer inclined side surface 2421 at one end facing the transverse DC groove 2130; the inner distance between the first outer inclined side surface 2411 and the second outer inclined side surface 2421 is smaller than the outer distance. The rear ends of the first outer linear heat dissipation section 2410 and the second outer linear heat dissipation section 2420, which are spaced apart in the left and right directions, guide the flow of coolant by setting inclined sides. Since the first outer inclined side 2411 and the second outer inclined side 2421 form a funnel shape, the outermost flow channel of the first outer linear heat dissipation section 2410 or the second outer linear heat dissipation section 2420 can guide the coolant to the outer area of the first longitudinal direct current channel 2110 or the second longitudinal direct current channel 2120. In this way, all parts in the cooling area can be covered by coolant, and the outer area of the liquid cooling base plate 10 can also be well covered and dissipated, ensuring heat dissipation stability.
[0067] like Figure 10 , Figure 11 As shown, in the second structural configuration, a third external linear heat dissipation section 2430 is also provided in the U-shaped water channel, and the third external linear heat dissipation section 2430 is disposed in the transverse direct current groove 2130. The third external linear heat dissipation section 2430 is spaced apart from the first external linear heat dissipation section 2410 to form a first interval space 2431. Or / and, the third external linear heat dissipation section 2430 is spaced apart from the second external linear heat dissipation section 2420 to form a second interval space 2432. In this way, the third external linear heat dissipation section 2430 can achieve mixed flow while ensuring the existence of the first interval space 2431 or the second interval space 2432, and can also increase the heat dissipation area during the transverse flow of coolant, thereby improving heat dissipation efficiency.
[0068] like Figure 10 , Figure 11 As shown, based on the second structure, the first outer linear heat dissipation section 2410 has a first outer inclined side surface 2411 at one end facing the transverse DC groove 2130; the second outer linear heat dissipation section 2420 has a second outer inclined side surface 2421 at one end facing the transverse DC groove 2130; the inner distance between the first outer inclined side surface 2411 and the second outer inclined side surface 2421 is smaller than the outer distance. Similarly, by employing the first outer inclined side surface 2411 and the second outer inclined side surface 2421, the coverage of each area by the coolant is enhanced, thereby improving heat dissipation performance.
[0069] like Figure 10 , Figure 11As shown, the third outer linear heat dissipation section 2430 has second chamfers 2433 at both ends in the second direction. One or both of the second chamfers 2433 at both ends are spaced apart from the first outer inclined side 2411 or the second outer inclined side 2421. The inclination direction of the second chamfer 2433 can be consistent with the inclination direction of the first outer inclined side 2411 or the second outer inclined side 2421, thus achieving the guidance of coolant flow through the second chamfers 2433 at both ends. Even after achieving the function of mixing the coolant, the coolant can still maintain stable conduction.
[0070] like Figure 10 , Figure 12 As shown, in the second structural configuration, the third outer linear heat dissipation section 2430 can also be connected to both the first outer linear heat dissipation section 2410 and the second outer linear heat dissipation section 2420. The second chamfers 2433 at both ends of the third outer linear heat dissipation section 2430 in the second direction are respectively paired with the first outer inclined side surface 2411 and the second outer inclined side surface 2421. This allows each small flow channel in the outer radiator 2400 to form a complete flow guiding structure. Although the coolant cannot mix within the transverse direct current groove 2130, the increased extension length of the third outer linear heat dissipation section 2430 also enhances the heat dissipation effect, thereby solving the technical problem.
[0071] like Figure 10 , Figure 12 As shown, the third outer linear heat dissipation section 2430 in this embodiment includes a first heat dissipation segment 2434 and a second heat dissipation segment 2435. Two second chamfers 2433 are respectively located on the first heat dissipation segment 2434 and the second heat dissipation segment 2435, and the two opposing ends of the first heat dissipation segment 2434 and the second heat dissipation segment 2435 are abutted together. Dividing the third outer linear heat dissipation section 2430 into two sections facilitates production and assembly. Although the first heat dissipation segment 2434 and the second heat dissipation segment 2435 are symmetrical structures during installation, they can be produced as a single component, and their orientation can be adjusted during assembly. Assembly only requires splicing, simplifying the assembly process and improving production efficiency.
[0072] like Figure 2 , Figure 3 As shown, the external heat sink 2400 and the internal heat sink 1400 in this embodiment can have the same structure. It is easy to imagine that the external heat sink 2400 can also adopt other conventional heat dissipation structures, which can also solve the technical problem and achieve the technical effect of promoting heat dissipation.
[0073] like Figure 2 , Figure 3 , Figure 6As shown, in this embodiment, the inner-opening folded flow channel 1160 at the inner liquid inlet end 1135 is used to redirect the flow of coolant at the inner liquid inlet end 1135. By setting the inner-opening folded flow channel 1160, the flow channel at the inner liquid inlet end 1135 is folded and lengthened, resulting in more efficient heat dissipation of the coolant at the inner liquid inlet end 1135. Since the coolant temperature at the inner liquid inlet end 1135 is relatively low, and the parts of the energy storage battery assembly with relatively high heat generation are correspondingly located in the area of the inner liquid inlet end 1135, timely heat dissipation of the areas with high heat generation can be ensured. Therefore, by using the inner-opening folded flow channel 1160, sufficient heat dissipation can be achieved in areas with high heat generation, ensuring a more uniform heat dissipation process for the entire liquid cooling plate.
[0074] like Figure 2 , Figure 3 , Figure 10 As shown, correspondingly, the externally opening folded flow channel 2500 at the external liquid inlet 2111 is used to redirect the flow of coolant at the external liquid inlet 2111. By setting the externally opening folded flow channel, the flow channel at the external liquid inlet 2111 is folded and lengthened, allowing for more efficient heat dissipation of the coolant at the external liquid inlet 2111. The externally opening folded flow channel and the internally opening folded flow channel 1160 are mirror-symmetrically arranged in the second direction (left-right direction) and are respectively connected to the liquid inlet 1010. In this way, the coolant entering through the liquid inlet 1010 is diverted to the externally opening folded flow channel and the internally opening folded flow channel 1160 for diversion, thus allowing for meandering flow within the externally opening folded flow channel and the internally opening folded flow channel 1160, maximizing heat absorption and preventing rapid outflow that could result in a large temperature difference in the liquid cooling plate. Therefore, the internally opening folded flow channel 1160 will be used as an example for detailed explanation:
[0075] like Figure 2 , Figure 3 , Figure 6As shown, the internally open folded flow channel 1160 in this embodiment further includes: an inlet guide channel 1161, a first deflection channel 1162, and a second deflection channel 1163. The inlet guide channel 1161 is used to guide the coolant entering the liquid-cooled base plate 10. The first deflection channel 1162 extends along a first direction, and the first end of the first deflection channel 1162 is connected to the end of the inlet guide channel 1161. The second deflection channel 1163 extends along the first direction, and the first end of the second deflection channel 1163 is connected to the end of the first deflection channel 1162. The end of the second deflection channel 1163 is connected to the water inlet guide channel 1133. The coolant is guided by the inlet guide channel 1161, where its flow can be redirected. The coolant then flows from back to front in the first redirection channel 1162, and then from front to back in the second redirection channel 1163. This multiple redirection of the coolant flow at the inlet ensures effective heat dissipation in areas with high heat generation.
[0076] like Figure 2 , Figure 3 , Figure 6 As shown, further, a third linear heat dissipation section 1430 is provided in the first deflection groove 1162, and a fourth linear heat dissipation section 1440 is provided in the second deflection groove 1163. The specific structures of the third linear heat dissipation section 1430 and the fourth linear heat dissipation section 1440 can refer to the specific structure of the inner heat sink 1400, and can be the same as the inner heat sink 1400. Therefore, it has a high thermal conductivity. Through the high thermal conductivity of the heat sink, it is beneficial to conduct as much heat from the energy storage battery assembly as possible to the coolant, thereby facilitating heat dissipation.
[0077] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.
Claims
1. A liquid cooling plate having a double-channel heat dissipation waterway, characterized in that, include: A liquid-cooled base plate with a liquid inlet and a liquid outlet; An internal heat dissipation channel is provided on a liquid cooling base plate and has an internal liquid inlet end, which is connected to the liquid inlet port; An external heat dissipation channel is disposed on the liquid cooling plate and surrounds the outside of the internal heat dissipation channel. The external heat dissipation channel has an external liquid inlet end, which is connected to the liquid inlet. An outer cover plate is connected to the liquid-cooled base plate and covers the inner heat dissipation channel and the outer heat dissipation channel. The inner liquid inlet end is provided with an inner opening folded flow channel, and the outer liquid inlet end is provided with an outer opening folded flow channel. The inner opening folded flow channel and the outer opening folded flow channel are used together to guide the coolant in the liquid inlet to opposite sides, so that the coolant enters the inner liquid inlet end and the outer liquid inlet end respectively.
2. The liquid cold plate with dual channel heat spreading waterways of claim 1, wherein, The internal heat dissipation channel includes: an internal guide groove, the internal guide groove having an open opening and a bottom surface located at both ends in a first direction; A flow guide bar is disposed on the liquid-cooled base plate and extends along a first direction within the inner flow guide groove. The flow guide bar divides the open opening into an inner liquid inlet end and an inner liquid outlet end, and divides the inner flow guide groove into a water inlet guide groove and a water outlet guide groove. The end of the flow guide bar away from the open opening is spaced apart from the bottom surface of the groove to form a communication port. An internal radiator is disposed in the inlet guide channel and the outlet guide channel.
3. The liquid cold plate with dual channel heat spreading waterways of claim 2, wherein, The liquid-cooled base plate has a snap-fit groove on its side wall; The flow guide bar includes a locking block and a stop block. The locking block is used to engage with the locking groove, and the stop block is connected to the locking block and extends from the opening toward the bottom surface of the groove in a first direction.
4. The liquid cold plate with dual channel heat spreading waterways of claim 1, wherein, The external heat dissipation channel includes a U-shaped water channel, which includes a first longitudinal DC groove and a second longitudinal DC groove formed on the liquid cooling base plate, and a transverse DC groove connected to the end of the first longitudinal DC groove and the end of the second longitudinal DC groove. One end of the first longitudinal DC groove forms the external liquid inlet end, and one end of the second longitudinal DC groove forms the external liquid outlet end. The first longitudinal DC groove and the second longitudinal DC groove both extend along a first direction, and the transverse DC groove extends along a second direction, wherein the first direction is perpendicular to the second direction. An external radiator is disposed in the U-shaped water channel.
5. The liquid cold plate with dual channel heat spreading water circuits of claim 4, wherein, The external heat sink includes: a first straight external heat sink, which is disposed in the first longitudinal DC groove and covers the first longitudinal DC groove along the second direction; The second linear external heat dissipation part is disposed in the second longitudinal DC groove and is spread throughout the second longitudinal DC groove along the second direction.
6. The liquid cold plate with dual channel heat spreading water circuits of claim 5, wherein, The first linear external heat dissipation part has a first inclined side surface at one end facing the transverse DC slot; The second linear external heat dissipation part has a second inclined side surface at one end facing the transverse DC slot; The inner distance between the first inclined side and the second inclined side is less than the outer distance.
7. The liquid cold plate with dual channel heat spreading water circuits of claim 6, wherein, The U-shaped water channel further comprises a third linear outer heat dissipation part, which is arranged in the transverse straight flow groove.
8. The liquid cold plate with dual channel heat spreading water circuits of claim 2, wherein, The inner open fold flow channel and the outer open fold flow channel are arranged in mirror symmetry. The inner open fold flow channel comprises a liquid inlet guide flow groove, which is used for guiding the cooling liquid entering the liquid cooling bottom plate. A first change direction groove, which extends in a first direction, has a first end connected to a second end of the liquid inlet guide flow groove. A second change direction groove, which extends in the first direction, has a first end connected to a second end of the first change direction groove and a second end connected to the water inlet guide groove.
9. The liquid cold plate with dual channel heat spreading water circuits of claim 8, wherein, The first change direction groove is provided with a third linear heat dissipation part, and the second change direction groove is provided with a fourth linear heat dissipation part.
10. An energy storage battery module, characterized by, The energy storage battery assembly and the liquid cooling plate with double-channel heat dissipation waterway as claimed in any one of claims 1-9 are included. The energy storage battery assembly is connected to the liquid cooling plate with double-channel heat dissipation waterway.