Thermal management system and battery

Abstract

The present application relates to a heat management system and a battery, comprising a heat exchange assembly and a turbulence assembly, the heat exchange assembly comprising heat exchange components, a plurality of heat exchange flow channels are formed on the heat exchange components, the plurality of heat exchange flow channels are sequentially arranged along a first direction, and the heat exchange flow channels are used to arrange heat exchange medium; the turbulence assembly is arranged in the heat exchange flow channels, the turbulence assembly comprises a plurality of turbulence components, and the plurality of turbulence components are sequentially arranged along a second direction; at least one turbulence unit is arranged on each turbulence component; when the same turbulence component is provided with a plurality of turbulence units, the plurality of turbulence units are sequentially arranged along the first direction, and each turbulence unit is arranged in different heat exchange flow channels; at least one turbulence hole is arranged on each turbulence unit, and when the same turbulence unit is provided with a plurality of turbulence holes, the plurality of turbulence holes are sequentially arranged along the first direction. The present application changes the flow direction and state of the heat exchange medium by arranging the turbulence assembly, improves the efficiency of convective heat exchange, and meets the uniform temperature requirement.

Description

Technical Field

[0001] This invention relates to the field of battery thermal management technology, and more particularly to thermal management systems and batteries. Background Technology

[0002] Power batteries generate heat during use. To prevent excessively high temperatures from affecting battery performance, a thermal management system is needed for heat exchange. Taking cylindrical cells as an example, given their unique cylindrical shape, a serpentine water-cooled plate is commonly used in the industry as a thermal management system to increase the heat exchange area. The serpentine water-cooled plate has multiple microchannels. When heat exchange is needed, coolant enters the plate from the inlet and flows along the microchannels, sequentially exchanging heat with the cells it passes through, before finally exiting from the outlet.

[0003] Due to the influence of heat and length factors, even within the same flow channel of a water-cooled plate, there is a significant temperature difference between the coolant at its inlet and outlet ends. Affected by the coolant, there is also a significant temperature difference between the battery cells along the flow channel, failing to meet the temperature consistency requirements throughout the cell's lifespan. Furthermore, because the internal flow channels of a water-cooled plate are micro-channels with small cross-sectional dimensions, they are typically manufactured using a one-piece extrusion molding process. Therefore, each flow channel is a single channel along its length, unlike stamped water-cooled plates where the flow channel orientation can be adjusted according to the temperature uniformity requirements of thermal management design. Consequently, existing serpentine water-cooled plates can no longer simultaneously meet the requirements for spatial integration and temperature uniformity of battery cells in different locations, hindering the market application of power batteries under high energy density and fast charging conditions. Summary of the Invention

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the difficulty of existing thermal management systems in meeting the temperature uniformity requirements of cells in different locations without reducing the existing energy density or changing the spatial arrangement. The present invention provides a thermal management system and battery that improves convective heat transfer efficiency and meets the temperature uniformity requirements by setting up a flow disturbance component to change the flow direction and state of the heat exchange medium in the heat exchange channel.

[0005] This invention provides a thermal management system, including a heat exchange assembly, which includes heat exchange components and multiple heat exchange channels arranged sequentially along a first direction. The heat exchange channels are used to hold a heat exchange medium. A turbulence assembly is disposed within the heat exchange channels and includes multiple turbulence components arranged sequentially along a second direction. Each turbulence component has at least one turbulence unit. When multiple turbulence units are provided on the same turbulence component, the multiple turbulence units are arranged sequentially along the first direction, and each turbulence unit is disposed within a different heat exchange channel. Each turbulence unit has at least one turbulence hole, which is a through-hole extending through the turbulence component along the second direction. When multiple turbulence holes are provided on the same turbulence unit, the multiple turbulence holes are arranged sequentially along the first direction.

[0006] In one embodiment of the present invention, along the second direction, the number of turbulence units in the preceding turbulence component of two adjacent turbulence components is not greater than the number of turbulence units in the following turbulence component.

[0007] In one embodiment of the present invention, when multiple turbulence units are provided in the same heat exchange channel, the turbulence holes of two adjacent turbulence units are staggered along the second direction.

[0008] In one embodiment of the present invention, when multiple turbulence units are provided in the same heat exchange channel, along the second direction, the diameter of the turbulence hole of the latter turbulence unit is not greater than the diameter of the turbulence hole of the former turbulence unit.

[0009] In one embodiment of the present invention, when multiple turbulence units are provided in the same heat exchange channel, along the second direction, the number of turbulence holes in the latter of two adjacent turbulence units is not greater than the number of turbulence holes in the former of the turbulence unit.

[0010] In one embodiment of the present invention, when multiple turbulence units are provided in the same heat exchange channel, along the second direction, the diameter of the turbulence hole of the latter turbulence unit in two adjacent turbulence units is not greater than the diameter of the turbulence hole of the former turbulence unit, and the number of turbulence holes of the latter turbulence unit in two adjacent turbulence units is not greater than the number of turbulence holes of the former turbulence unit.

[0011] In one embodiment of the present invention, the heat exchange component includes a plurality of partition ribs, and the heat exchange channel is divided by the partition ribs; along the first direction, at least two adjacent partition ribs are included, wherein the first partition rib has a recessed mounting groove formed along the first direction, and the bottom of the mounting groove has a transition hole penetrating the partition rib, the diameter of the transition hole being smaller than the diameter of the mounting groove; wherein the second partition rib has a recessed mating groove formed along the first direction, the diameter of the mating groove being smaller than the diameter of the transition hole. The turbulence-inducing component passes through the transition hole and is disposed within the heat exchange channel. Each turbulence-inducing unit has a mounting boss protruding from the same side of its end. When multiple turbulence-inducing units are disposed, along the first direction, the outer diameter of the mounting boss of the latter turbulence-inducing unit is smaller than the outer diameter of the mounting boss of the former turbulence-inducing unit. When the turbulence-inducing component is disposed within the heat exchange channel, the end of the turbulence-inducing component away from the mounting boss is disposed within the mating groove, and the mounting boss is disposed within the corresponding mounting groove.

[0012] In one embodiment of the present invention, the heat exchange component includes a first bending unit and a second bending unit, the first bending unit and the second bending unit being alternately arranged in sequence along the second direction, and the bending directions of the first bending unit and the second bending unit being opposite; both the first bending unit and the second bending unit include a bending portion; the turbulence-disrupting component is disposed on the bending portion.

[0013] In one embodiment of the present invention, the heat exchange component is provided with a heat exchange contact surface; the heat exchange assembly further includes a heat-conducting component, which is disposed on the heat exchange contact surface.

[0014] The present invention also provides a battery, including a battery cell and a thermal management system as described in any one of the above.

[0015] The technical solution of the present invention has the following advantages compared with the prior art:

[0016] The thermal management system described in this invention delivers a heat exchange medium into the heat exchange channel during the heat exchange process. When the heat exchange medium is not in contact with the turbulence-prone unit, it flows along the channel and exchanges heat. When the heat exchange medium encounters the turbulence-prone unit within the channel, the increased flow resistance alters both the flow direction and state, thereby improving the convective heat transfer efficiency. This effectively solves the problems of uneven heat transfer and temperature differences in long, narrow heat exchange channels with a unidirectional flow along their length, without reducing system energy density or altering spatial arrangement, thus ensuring consistent temperature at different locations within the channel. Compared to conventional thermal management designs that rely on increasing pipe joints and water-cooling plates to achieve uniformity, this system, with its simple structure and heat exchange components housed within the channel, effectively reduces costs, maintains a small overall size, does not occupy additional installation space, and ensures reliable sealing during heat exchange medium circulation. When applied to the thermal management of power batteries, it can meet the temperature difference requirements of the cells and ensure the consistency of cell lifespan in different locations. Furthermore, the thermal management system described in this invention is not only applicable to the thermal management of power batteries, but also suitable for other industries using narrow flow channel heat exchangers where temperature difference issues exist. Attached Figure Description

[0017] To make the content of this invention easier to understand, the invention will be further described in detail below with reference to specific embodiments and accompanying drawings, wherein...

[0018] Figure 1 This is a schematic diagram of a thermal management system according to a preferred embodiment of the present invention;

[0019] Figure 2 This is a first-view cross-sectional structural diagram of the thermal management system in a preferred embodiment of the present invention;

[0020] Figure 3 This is a schematic diagram of the structure of the turbulence-disrupting component in a preferred embodiment of the present invention;

[0021] Figure 4 This is a second-view cross-sectional structural diagram of the thermal management system in a preferred embodiment of the present invention;

[0022] Figure 5 This is a schematic diagram of the flow structure of the heat exchange medium in the heat exchange channel in a preferred embodiment of the present invention;

[0023] Figure 6 This is a cross-sectional view of the heat exchange component in a preferred embodiment of the present invention;

[0024] Figure 7 This is a schematic diagram of the heat exchange component in a preferred embodiment of the present invention;

[0025] Figure 8 This is a schematic diagram of another thermal management system in a preferred embodiment of the present invention;

[0026] Figure 9 This is a schematic diagram of the battery structure in a preferred embodiment of the present invention;

[0027] Figure 10 Temperature test data for thermal management of battery cells using existing technology solutions with non-convection-enhanced flow channels;

[0028] Figure 11 Temperature test data for thermal management of battery cells using the thermal management system described in this invention.

[0029] Explanation of reference numerals in the accompanying drawings: D1, First direction; D2, Second direction; 11, Heat exchange component; 111, Heat exchange channel; 112, Separating rib; 1121, Mounting groove; 1122, Transition hole; 1123, Butt joint groove; 1131, First bending unit; 1132, Second bending unit; 1133, Bending part; 114, Heat exchange contact surface; 121, Water inlet component; 122, Water outlet component; 123, Water passage hole; 13, Heat conduction component; 21, Flow turbulence component; 211, Flow turbulence unit; 2111, Flow turbulence hole; 2112, Mounting boss; 31, Battery cell. Detailed Implementation

[0030] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments described are not intended to limit the present invention.

[0031] Reference Figure 1 As shown, the present invention discloses a thermal management system, including a heat exchange component and a turbulence evacuation component.

[0032] The heat exchange assembly includes a heat exchange component 11, which facilitates the transport of the heat exchange medium, enabling heat exchange between the medium and the component to be heat-exchanged, thereby achieving the purpose of thermal management. Specifically, refer to... Figure 2 As shown, the heat exchange component 11 has multiple heat exchange channels 111, which are arranged sequentially along the first direction D1. The heat exchange channels 111 are used to hold the heat exchange medium. The heat exchange component 11 can be configured with different shapes according to different needs; for example, it can be configured as a "serpentine" or "harmonica tube" shaped structure. Furthermore, the specific number and cross-sectional shape of the heat exchange channels 111 can be selected differently, which will not be elaborated further.

[0033] The turbulence-inducing components are used to alter the flow direction and state of the heat exchange medium in the heat exchange channel 111, improving convective heat transfer efficiency to meet temperature uniformity requirements. Convective heat transfer efficiency refers to the heat transfer between the heat exchange medium and the inner wall of the heat exchange channel 111, and is related to the flow state of the heat exchange medium. Specifically, refer to... Figure 2 , Figure 3 and Figure 4 As shown, the flow-dispersing component is disposed within the heat exchange channel 111. Compared to conventional thermal management designs that rely on increasing the number of pipe joints and water-cooling plates to ensure uniform temperature, the flow-dispersing component, being disposed within the heat exchange channel 111 and possessing a simple structure, effectively reduces costs, maintains a small overall size of the thermal management system without occupying additional installation space, and ensures reliable sealing during heat exchange medium circulation. The flow-dispersing component includes multiple flow-dispersing elements 21, which are sequentially arranged along the second direction D2. Different numbers of flow-dispersing elements 21 can be configured according to different needs, such as two, three, four, etc. The specific orientation of the second direction D2 can be set according to the requirements of different heat exchange elements 11; preferably, the second direction D2 is perpendicular to the first direction D1. Each flow-dispersing element 21 is provided with at least one flow-dispersing unit 211. The number of flow-dispersing units 211 on each flow-dispersing element 21 can be adjusted according to different needs. By combining different numbers of flow-dispersing elements 21, different heat exchange requirements can be met, effectively achieving thermal management. When a single flow-dispersing component 21 is provided with multiple flow-dispersing units 211, the multiple flow-dispersing units 211 are arranged sequentially along the first direction D1, and each flow-dispersing unit 211 is located within a different heat exchange channel 111. Each flow-dispersing unit 211 is provided with at least one flow-dispersing hole 2111, which is configured as a through hole penetrating the flow-dispersing component 21 along the second direction D2. Under the premise that other factors remain unchanged, when the heat exchange medium flows through the flow-dispersing unit 211 within the heat exchange channel 111, the flow resistance increases, thus changing the flow direction and flow state of the heat exchange medium, thereby improving the convective heat transfer efficiency of the heat exchange medium. Different numbers of flow-dispersing holes 2111 can be provided according to the heat exchange requirements of different heat exchange components 11, such as one, two, three, etc. When the same turbulence unit 211 is provided with multiple turbulence holes 2111, the multiple turbulence holes 2111 are arranged sequentially along the first direction D1, so as to better change the flow direction and flow state of the heat exchange medium while making full use of space and improving space utilization.

[0034] Taking cell 31 as an example, in a typical flow channel, when transporting the heat exchange medium for heat exchange, due to the narrow structure of the flow channel, the temperature difference of the heat exchange medium at the inlet and outlet ends of the flow channel is relatively large, while the temperature difference between the heat exchange medium and cell 31 gradually decreases. With the convective heat transfer efficiency remaining constant, this results in a large temperature difference between cell 31 located near the inlet end of the flow channel and cell 31 located near the outlet end of the flow channel due to uneven heat transfer.

[0035] Reference Figure 5 As shown, in practical use, the thermal management system of the present invention places the turbulence-disrupting component 21 at the location of uneven heat exchange in the heat exchange channel 111. During heat exchange, a heat exchange medium is supplied to the heat exchange channel 111. When the heat exchange medium is not in contact with the turbulence-disrupting component 211, it flows along the heat exchange channel 111 and exchanges heat. When the heat exchange medium encounters the turbulence-disrupting component 211 within the heat exchange channel 111, the flow resistance increases, thus changing the flow direction and flow state of the heat exchange medium, thereby improving the convective heat transfer efficiency of the heat exchange medium. This effectively solves the problems of uneven heat exchange and temperature differences in the long and narrow heat exchange channel 111 with a single flow direction along its length, without reducing the system's energy density or changing the spatial arrangement, effectively ensuring the temperature consistency at different locations in the heat exchange channel 111. Compared to conventional thermal management designs that rely on increasing the number of pipe joints and water-cooling plates to ensure uniformity, this invention, with its heat exchange components housed within the heat exchange channel 111 and featuring a simple structure, effectively reduces costs. It also ensures a compact overall thermal management system that doesn't occupy additional installation space and guarantees reliable sealing during heat exchange medium circulation. When applied to the thermal management of power batteries, it meets the temperature difference requirements of the battery cells 31, ensuring consistent lifespan across different locations. Furthermore, the thermal management system described in this invention is not only applicable to the thermal management of power batteries but also suitable for other industries using narrow flow channel heat exchangers where temperature difference issues exist.

[0036] Reference Figure 4 As shown, in some embodiments of the thermal management system of the present invention, along the second direction D2, the number of turbulence units 211 in the preceding turbulence component 21 of two adjacent turbulence components 21 is no greater than the number of turbulence units 211 in the following turbulence component 21. Taking three turbulence components 21 as an example, the number of turbulence units 211 on the three turbulence components 21 can be set to one, two, three, or two, two, three, or two, three, three, etc. When a conventional flow channel transports heat exchange medium for heat exchange, due to its own narrow structure, the temperature difference of the heat exchange medium at the inlet and outlet of the flow channel is large, and the temperature difference between the heat exchange medium and the battery cell 31 gradually decreases. Therefore, by limiting the number of turbulence units 211 of different turbulence components 21, the temperature difference of the heat exchange medium in the heat exchange flow channel 111 can be better reduced to meet the external requirements for temperature uniformity. Furthermore, the number of turbulence units 211 can be flexibly selected according to specific temperature difference requirements, which can effectively reduce costs, ensure the stability of the overall structure, meet the overall system's design specifications for pressure drop, and reduce the energy consumption of the pump body used to transport the heat exchange medium.

[0037] Furthermore, refer to Figure 4 As shown, in some embodiments of the thermal management system of the present invention, when multiple turbulence units 211 are provided in the same heat exchange channel 111, the turbulence holes 2111 of two adjacent turbulence units 211 are staggered along the second direction D2. Within the same heat exchange channel 111, after the heat exchange medium flows along the heat exchange channel 111 and passes through one turbulence unit 211, the flow direction of the heat exchange medium changes significantly when it flows through the next turbulence unit 211. Therefore, by limiting the positions of the turbulence holes 2111 on different turbulence units 211 within the same heat exchange channel 111, the convection effect of the heat exchange medium at the rear end of the heat exchange channel 111 can be further enhanced, reducing the temperature difference and ensuring temperature consistency.

[0038] Reference Figure 4 As shown, in some embodiments of the thermal management system of the present invention, when multiple turbulence units 211 are provided in the same heat exchange channel 111, along the second direction D2, the aperture of the turbulence hole 2111 of the latter turbulence unit 211 is not larger than the aperture of the turbulence hole 2111 of the former turbulence unit 211. Specifically, the convective heat transfer efficiency is related to the flow state of the heat transfer medium. Under the same conditions, the smaller the aperture of the turbulence hole 2111 and the faster the flow velocity of the heat transfer medium through the turbulence hole 2111, the more turbulent the flow becomes, i.e., the higher the convective heat transfer efficiency. Therefore, by limiting the aperture of the turbulence holes 2111 on different turbulence units 211 within the same heat exchange channel 111, it is ensured that when the temperature difference between the heat exchange medium and the battery cell 31 is still large and there is no need to improve the convective heat transfer efficiency, the turbulence unit 211 is not in contact with the turbulence unit 211, or it is in contact with the turbulence unit 211 with a larger aperture, thus ensuring low flow resistance. Conversely, when the temperature difference between the heat exchange medium and the battery cell 31 is small, it can contact the turbulence unit 211 with a smaller aperture, causing the heat exchange medium to experience greater flow resistance, thereby improving convective heat transfer efficiency and ensuring temperature consistency. This effectively reduces costs, meets the overall system's design specifications for pressure drop, and reduces the energy consumption of the pump used to transport the heat exchange medium. It should be noted that, depending on actual needs, only the aperture size of the turbulence holes 2111 can be limited, or both the aperture size and the position of the turbulence holes 2111 can be limited.

[0039] Reference Figure 4As shown, in some embodiments of the thermal management system of the present invention, when multiple turbulence units 211 are provided in the same heat exchange channel 111, along the second direction D2, the number of turbulence holes 2111 in the latter turbulence unit 211 is no greater than the number of turbulence holes 2111 in the former turbulence unit 211. Under the same conditions, the fewer the number of turbulence holes 2111, the faster the flow velocity of the heat exchange medium through the turbulence holes 2111, and the more turbulent the state becomes, i.e., the higher the convective heat transfer efficiency. Therefore, by limiting the number of turbulence holes 2111 on different turbulence units 211 in the same heat exchange channel 111, it is ensured that when the temperature difference between the heat exchange medium and the battery cell 31 is still large and it is not necessary to improve the convective heat transfer efficiency, the medium does not contact the turbulence unit 211 or contacts the turbulence unit 211 with a large number of turbulence holes 2111, so as to ensure that the flow resistance is small. When the temperature difference between the heat exchange medium and the battery cell 31 is small, the heat exchange medium can contact the turbulence unit 211 with a small number of turbulence holes 2111, resulting in greater flow resistance and improving convective heat transfer efficiency while ensuring temperature consistency. This effectively reduces costs, meets the overall system's design specifications for pressure drop, and reduces the energy consumption of the pump used to transport the heat exchange medium. It should be noted that, depending on actual needs, only the number of turbulence holes 2111 can be limited, or both the number and location of the turbulence holes 2111 can be limited.

[0040] Reference Figure 4 As shown, in some embodiments of the thermal management system of the present invention, when multiple turbulence units 211 are provided in the same heat exchange channel 111, along the second direction D2, the diameter of the turbulence hole 2111 of the latter turbulence unit 211 is not larger than the diameter of the turbulence hole 2111 of the former turbulence unit 211, and the number of turbulence holes 2111 of the latter turbulence unit 211 is not greater than the number of turbulence holes 2111 of the former turbulence unit 211. The specific effects of the number and diameter of the turbulence holes 2111 are not elaborated further. It should be noted that, according to actual needs, only the number and diameter of the turbulence holes 2111 can be limited. Preferably, the position, number, and diameter of the turbulence holes 2111 are limited simultaneously to achieve the best convective heat transfer efficiency improvement effect and ensure temperature consistency.

[0041] Reference Figure 2 and Figure 6 As shown, in some embodiments of the thermal management system of the present invention, the heat exchange component 11 includes a plurality of partition ribs 112, and the heat exchange channel 111 is divided by the partition ribs 112. By setting the partition ribs 112, the heat exchange channel 111 can be effectively separated, ensuring structural stability.

[0042] Furthermore, refer to Figure 6 As shown, in some embodiments of the thermal management system of the present invention, at least two adjacent separating ribs 112 are included along the first direction D1, wherein the first separating rib 112 has a recessed mounting groove 1121 along the first direction D1. The mounting groove 1121 can fix and limit the flow-disrupting component 21. The bottom of the mounting groove 1121 has a transition hole 1122 that passes through the separating rib 112. The diameter of the transition hole 1122 is smaller than the diameter of the mounting groove 1121. The transition hole 1122 facilitates the assembly of the flow-disrupting unit 211 corresponding to the flow-disrupting component 21 into the corresponding heat exchange channel 111 through the transition hole 1122 during assembly. One of the latter dividing ribs 112 has a recessed groove 1123 along the first direction D1. The diameter of the groove 1123 is smaller than that of the transition hole 1122, so that the end of the turbulence unit 211 away from the mounting boss 2112 can be fixed through the groove 1123, increasing the stability of the structure. (Refer to...) Figure 3 and Figure 4 As shown, the flow-deflecting component 21 is disposed within the heat exchange channel 111 through the transition hole 1122. Each flow-deflecting unit 211 has a mounting boss 2112 protruding from the same side of its end. When multiple flow-deflecting units 211 are disposed, along the first direction D1, the outer diameter of the mounting boss 2112 of the latter flow-deflecting unit 211 is smaller than the outer diameter of the mounting boss 2112 of the former flow-deflecting unit 211. Preferably, the outer diameter of the corresponding mounting boss 2112 matches the aperture of the corresponding mounting groove 1121, so that the corresponding mounting boss 2112 fits the corresponding mounting groove 1121 and ensures overall sealing. When the flow-deflecting component 21 is disposed within the heat exchange channel 111, the end of the flow-deflecting component 21 away from the mounting boss 2112 is disposed within the mating groove 1123, and the mounting boss 2112 is disposed within the corresponding mounting groove 1121.

[0043] Specifically, when assembling a flow-disrupting component 21 with N (N≥2, N∈Z) flow-disrupting units 211, there are N+1 corresponding partition ribs 112. The last partition rib 112 along the first direction D1 has a mating groove 1123 to mate with the end of the flow-disrupting component 21. The remaining partition ribs 112 all have mounting grooves 1121 and transition holes 1122 adapted to the corresponding flow-disrupting units 211. Along the first direction D1, the diameter of the mounting groove 1121 on the next partition rib 112 is not larger than the diameter of the transition hole 1122 on the previous partition rib 112. Taking a flow-disrupting component 21 with one, two, and three flow-disrupting units 211 arranged sequentially as an example, three corresponding heat exchange channels 111 are selected, and the three heat exchange channels 111 are separated by four partition ribs 112. Along the first direction D1, the first of the four dividing ribs 112 has three mounting grooves 1121, and each of the three mounting grooves 1121 has a transition hole 1122 at its bottom. The second dividing rib 112 has one mating groove 1123 to mate with a baffle component 21 having one baffle unit 211; the second dividing rib 112 also has two mounting grooves 1121, and each of the two mounting grooves 1121 has a transition hole 1122 at its bottom. The third dividing rib 112 has one mating groove 1123 to mate with a baffle component 21 having two baffle units 211; the third dividing rib 112 also has one mounting groove 1121, and the bottom of the mounting groove 1121 has a transition hole 1122. The fourth dividing rib 112 has one mating groove 1123 to mate with a baffle component 21 having three baffle units 211. Along the first direction D1, it should be noted that it is not only possible to set the above-mentioned partition ribs 112, but also to adapt to and assemble them with the corresponding aerodynamic components 21.

[0044] Preferably, the material of the partition rib 112 is 3003 aluminum alloy (AL3003), which has good ductility and brazing performance. Preferably, the material of the mounting boss 2112 is 4343 brazing layer material. This further limitation on the materials ensures that, while the mounting groove 1121 and the mounting boss 2112 limit the insertion depth of the flow-disrupting component 21, the mounting boss 2112 can be melted at high temperature and welded to the mounting groove 1121 during the corresponding assembly process. This prevents crossflow between adjacent heat exchange channels 111 and ensures the overall heat exchange effect.

[0045] Reference Figure 3As shown, in some embodiments of the thermal management system of the present invention, the flow-deflecting component 21 is configured as a cylindrical structure. Compared with other structures, the cylindrical flow-deflecting component 21 is simple in structure and easy to manufacture, and can ensure that the resistance encountered by the heat exchange medium when flowing in the heat exchange channel 111 is reduced, which meets the overall system's design target for pressure drop and reduces the energy consumption of the pump body used to transport the heat exchange medium.

[0046] In some embodiments of the thermal management system described in this invention, the spacing between two adjacent flow-disrupting components 21 along the second direction D2 is related to the heat exchange demand. Specifically, taking the battery cell 31 as an example, the heat exchange demand is related to the thickness or diameter of the battery cell 31 and the temperature difference between it and the adjacent flow-disrupting component 21 along its own axial cross-section. The larger the thickness or diameter of the battery cell 31 and the greater the adjacent temperature difference, the smaller the required spacing. By reasonably setting the spacing between the flow-disrupting components 21, the temperature control requirements can be guaranteed while effectively reducing costs.

[0047] Reference Figure 7 As shown, in some embodiments of the thermal management system of the present invention, the heat exchange component 11 includes a first bending unit 1131 and a second bending unit 1132. The first bending unit 1131 and the second bending unit 1132 are alternately arranged along the second direction D2, and the bending directions of the first bending unit 1131 and the second bending unit 1132 are opposite. The arrangement of the first bending unit 1131 and the second bending unit 1132 makes the heat exchange component 11 have an overall "serpentine" structure. When it exchanges heat with the cylindrical battery cell 31, it not only improves space utilization but also better fits the battery cell 31, ensuring a larger contact area for better heat exchange.

[0048] Furthermore, in some embodiments of the thermal management system described in this invention, both the first bending unit 1131 and the second bending unit 1132 include a bending portion 1133, which is the middle region of the first bending unit 1131 and the second bending unit 1132. A turbulence-inducing component 21 is disposed on the bending portion 1133 to ensure that the heat exchange medium accelerated by the turbulence-inducing component 21 can fully contact the battery cell 31, thereby ensuring better heat exchange performance.

[0049] Reference Figure 1 and Figure 8As shown, in some embodiments of the thermal management system described in this invention, the heat exchange component 11 is provided with a heat exchange contact surface 114; the heat exchange assembly also includes a heat-conducting component 13, which is disposed on the heat exchange contact surface 114. Whether it is a "serpentine" heat exchange component 11 with bending units or a "harmonica tube" shaped heat exchange component 11 without bending units, the heat-conducting component 13 effectively fills the gap between the battery cell 31 and the heat exchange contact surface 114, reducing the thermal resistance of the heat conduction process and improving the heat conduction efficiency. Different heat-conducting components 13 can be provided according to actual needs, such as thermally conductive structural adhesive, thermally conductive silicone grease, thermally conductive pads, etc.

[0050] Reference Figure 1 and Figure 8 As shown, in some embodiments of the thermal management system of the present invention, the heat exchange component further includes a water inlet component 121 and a water outlet component 122. The water inlet component 121 and the water outlet component 122 are respectively disposed on both sides of the heat exchange component 11 along the second direction D2. Both the water inlet component 121 and the water outlet component 122 are provided with water passages 123, which are connected to the heat exchange channel 111. The input and output of the heat exchange medium are realized through the water passages 123 on the water inlet component 121 and the water outlet component 122. Preferably, the turbulence-inducing component is disposed on the side of the heat exchange component 11 closer to the water outlet component 122 to enhance the heat exchange efficiency at the corresponding position at the rear end of the heat exchange channel 111, thereby balancing the temperature difference in the corresponding area. Simultaneously, it can effectively reduce costs, ensure the stability of the overall structure, meet the overall system's design specifications for pressure drop, and reduce the energy consumption of the pump used to transport the heat exchange medium.

[0051] Reference Figure 9 As shown, this invention discloses a battery, including a cell 31 and the thermal management system described in any of the above embodiments. Since the battery of this invention includes the thermal management system described in the above embodiments, it also possesses all the advantages described herein, and will not be repeated here.

[0052] To verify the difference in performance between the existing flow channel without enhanced convection and the thermal management system of this invention, which employs enhanced convection, experimental tests were conducted on both under identical conditions. Specifically, a low-temperature heating test was performed in a low-temperature environment chamber at a flow rate of 1 L / min and an inlet water temperature of 45°C at a temperature of -20°C. Two temperature sensors were used for the test, one at the top center of each of the two battery cells 31 at the corresponding inlet and outlet ends.

[0053] Reference Figure 10 and Figure 11As shown in the figure, the horizontal axis represents the test time in seconds, and the vertical axis represents the temperature in degrees Celsius. T1 represents the temperature of the temperature sensor located on the corresponding inlet end of the battery cell 31, and T2 represents the temperature of the temperature sensor located on the corresponding outlet end of the battery cell 31. Under the premise that the heating time and test conditions are exactly the same, using a flow channel without enhanced convection, the temperature difference between the two battery cells 31 reaches 11.2℃ when heating stops. However, using a thermal management system with enhanced convection, the temperature difference between the two battery cells 31 decreases to 5.3℃ when heating stops. It can be seen that the thermal management system described in this invention can effectively ensure a small temperature difference between battery cells 31 located in different positions, ensuring the consistency of the lifespan of battery cells 31 in different positions.

[0054] Working principle:

[0055] The battery cell 31 is mounted on the heat exchange contact surface 114 of the heat exchange component 11 via the heat-conducting component 13. The heat exchange medium is supplied to the heat exchange channel 111 through the water inlet 121 via the water passage 123. The heat exchange medium flows along the heat exchange channel 111 and is discharged from the water outlet 122 via the water passage 123. When the heat exchange medium flows along the heat exchange channel 111, since there is no turbulence-inducing component 21 at the front end of the heat exchange channel 111, the heat exchange medium flows normally along the heat exchange channel 111. However, when the heat exchange medium flows through the turbulence-inducing unit 211 within the heat exchange channel 111, the flow resistance increases, thus changing the flow direction and flow state of the heat exchange medium, thereby improving the convective heat transfer efficiency. Furthermore, as the diameter of the turbulence-inducing holes 2111 on the turbulence-inducing unit 211 decreases and the number increases, the change in the flow state of the heat exchange medium gradually intensifies, further improving the convective heat transfer efficiency. Without reducing the system's energy density or changing the spatial arrangement, it can effectively solve the problems of uneven heat exchange and temperature difference in the long and narrow heat exchange channel 111 with a single flow direction along its length, and effectively ensure the temperature consistency at different locations in the heat exchange channel 111.

[0056] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A thermal management system, characterized in that, include: A heat exchange assembly, the heat exchange assembly including a heat exchange component (11), the heat exchange component (11) having a plurality of heat exchange channels (111) arranged sequentially along a first direction (D1), the heat exchange channels (111) being used to set a heat exchange medium; A flow-disrupting assembly is disposed within the heat exchange channel (111). The flow-disrupting assembly includes multiple flow-disrupting components (21), which are arranged sequentially along a second direction (D2). Each flow-disrupting component (21) is provided with multiple flow-disrupting units (211), which are arranged sequentially along a first direction (D1) and are disposed within different heat exchange channels (111). Each flow-disrupting unit (211) is provided with at least one flow-disrupting hole (2111), which is configured as a through hole penetrating the flow-disrupting component (21) along the second direction (D2). When the same flow-disrupting unit (211) is provided with multiple flow-disrupting holes (2111), the multiple flow-disrupting holes (2111) are arranged sequentially along the first direction (D1).

2. The thermal management system according to claim 1, characterized in that: Along the second direction (D2), the number of turbulence units (211) in the first of two adjacent turbulence components (21) is no greater than the number of turbulence units (211) in the second turbulence component (21).

3. The thermal management system according to claim 2, characterized in that: When multiple turbulence units (211) are provided in the same heat exchange channel (111), the turbulence holes (2111) of two adjacent turbulence units (211) are staggered along the second direction (D2).

4. The thermal management system according to claim 2 or 3, characterized in that: When multiple turbulence units (211) are provided in the same heat exchange channel (111), along the second direction (D2), the diameter of the turbulence hole (2111) of the latter turbulence unit (211) is not greater than the diameter of the turbulence hole (2111) of the former turbulence unit (211).

5. The thermal management system according to claim 2 or 3, characterized in that: When multiple turbulence units (211) are provided in the same heat exchange channel (111), along the second direction (D2), the number of turbulence holes (2111) of the latter turbulence unit (211) of two adjacent turbulence units (211) is not greater than the number of turbulence holes (2111) of the former turbulence unit (211).

6. The thermal management system according to claim 2 or 3, characterized in that: When multiple turbulence units (211) are provided in the same heat exchange channel (111), along the second direction (D2), the diameter of the turbulence hole (2111) of the latter turbulence unit (211) in two adjacent turbulence units (211) is not greater than the diameter of the turbulence hole (2111) of the former turbulence unit (211), and the number of turbulence holes (2111) of the latter turbulence unit (211) in two adjacent turbulence units (211) is not greater than the number of turbulence holes (2111) of the former turbulence unit (211).

7. The thermal management system according to claim 2, characterized in that: The heat exchange component (11) includes a plurality of partition ribs (112), and the heat exchange channel (111) is formed by the partition ribs (112); Along the first direction (D1), there are at least two adjacent partition ribs (112), wherein the first partition rib (112) has a recessed mounting groove (1121) along the first direction (D1), and the bottom of the mounting groove (1121) has a transition hole (1122) that passes through the partition rib (112), and the diameter of the transition hole (1122) is smaller than the diameter of the mounting groove (1121); the second partition rib (112) has a recessed mating groove (1123) along the first direction (D1), and the diameter of the mating groove (1123) is smaller than the diameter of the transition hole (1122). The turbulence-disrupting component (21) passes through the transition hole (1122) and is disposed in the heat exchange channel (111). Each turbulence-disrupting unit (211) has a mounting boss (2112) protruding from the end on the same side. When multiple turbulence-disrupting units (211) are disposed, along the first direction (D1), the outer diameter of the mounting boss (2112) of the latter turbulence-disrupting unit (211) is smaller than the outer diameter of the mounting boss (2112) of the former turbulence-disrupting unit (211). When the turbulence-disrupting component (21) is disposed in the heat exchange channel (111), the end of the turbulence-disrupting component (21) away from the mounting boss (2112) is disposed in the docking groove (1123), and the mounting boss (2112) is disposed in the corresponding mounting groove (1121).

8. The thermal management system according to claim 1, characterized in that: The heat exchange component (11) includes a first bending unit (1131) and a second bending unit (1132), which are alternately arranged along the second direction (D2). The bending directions of the first bending unit (1131) and the second bending unit (1132) are opposite. Both the first bending unit (1131) and the second bending unit (1132) include a bending portion (1133). The turbulence-disrupting component (21) is disposed on the bending portion (1133).

9. The thermal management system according to claim 1 or 8, characterized in that: The heat exchange component (11) is provided with a heat exchange contact surface (114); the heat exchange assembly also includes a heat-conducting component (13), which is disposed on the heat exchange contact surface (114).

10. A battery, characterized in that, It includes the battery cell (31) and the thermal management system as described in any one of claims 1-9.

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