New energy battery thermal management system

Abstract

The new energy battery thermal management system disclosed by the application comprises a liquid inlet collecting part, a liquid distribution part, a liquid outlet collecting part, a heat exchange part and an anti-freezing liquid circulating device. The heat exchange part is internally provided with a closed heat exchange cavity, and the heat exchange cavity is internally provided with uniformly distributed working medium. The liquid distribution part is arranged in the heat exchange cavity and partially immersed in the working medium. When the temperature of the battery surface is greater than a first preset temperature value, the working medium can change from liquid state to gaseous state and condense on the surface of the liquid distribution part exposed to the liquid working medium. When the temperature of the battery surface is less than a second preset temperature value, the liquid distribution part immersed in the liquid working medium can heat the working medium, so that the working medium changes from liquid state to gaseous state and condenses on the inner wall of the heat exchange cavity. The new energy battery thermal management system provided by the application solves the problem that different battery monomers cannot be uniformly cooled by the existing battery thermal management system.

Description

Technical Field

[0001] This application relates to the field of battery thermal management equipment technology, and in particular to a new energy battery thermal management system. Background Technology

[0002] New energy vehicle batteries generate a significant amount of heat during fast charging and other operating conditions. Inadequate thermal management can lead to insufficient heat dissipation, potentially causing thermal runaway, fire, or even explosion. Current battery thermal management systems primarily rely on direct refrigerant cooling to dissipate heat from the battery surface. However, factors such as the order in which the refrigerant reaches different parts of the battery and variations in refrigerant flow rate result in inconsistent heat dissipation across different areas. This leads to uneven temperature distribution on the battery surface, potentially impacting battery lifespan. Furthermore, under fast charging conditions, significant temperature differences between different parts of the battery surface can cause overcharging or over-discharging. Summary of the Invention

[0003] Therefore, it is necessary to provide a new energy battery thermal management system to solve the problem that different battery cells cannot achieve uniform heat dissipation through existing battery thermal management systems.

[0004] The new energy battery thermal management system provided in this application includes an inlet manifold, a distributor, an outlet manifold, a heat exchanger, and an antifreeze circulation device. The inlet manifold is connected to the outlet manifold through multiple distributors, and the inlet end of the inlet manifold and the outlet end of the outlet manifold are respectively connected to the antifreeze circulation device. The heat exchanger is attached to the surface of the battery and has a closed heat exchange chamber containing a uniformly distributed working fluid. The distributor passes through the heat exchange chamber and is partially immersed in the working fluid. When the temperature of the battery surface exceeds a first preset temperature value, the working fluid changes from a liquid to a gaseous state and condenses on the surface of the distributor and the upper wall of the heat exchange chamber where the liquid working fluid is exposed. When the temperature of the battery surface is lower than the second preset temperature value, the liquid distribution section immersed in the liquid working medium can heat the working medium so that the working medium changes from liquid to gas and condenses on the inner wall of the heat exchange chamber. In addition, the liquid inlet collection section can heat the lower surface of the battery, and the liquid outlet collection section can heat the upper surface of the battery.

[0005] In one embodiment, the antifreeze circulation device includes a liquid pump, a refrigeration component, a heating component, a first three-way valve, and a second three-way valve. The liquid outlet manifold is connected to the liquid pump, and the liquid pump is connected to the refrigeration component and the heating component respectively through the first three-way valve. The refrigeration component and the heating component are respectively connected to the second three-way valve and connected to the liquid inlet end of the liquid inlet manifold through the second three-way valve, so as to form a circulation loop for the antifreeze.

[0006] In one embodiment, the cooling component includes a fan and a cooling module. The cooling module is connected to a first three-way valve and a second three-way valve, respectively. The fan is located on one side of the cooling module to drive airflow to dissipate heat from the antifreeze inside the cooling module.

[0007] In one embodiment, the antifreeze circulation device further includes a first temperature sensor and a control element. The control element is electrically connected to a first three-way valve, a second three-way valve, and the first temperature sensor, respectively. The first temperature sensor is located on the battery surface, and the second temperature sensor is located at the outlet of the cooling module. When the temperature of the battery surface is greater than a first preset temperature value, the control element can control the first and second three-way valves to connect to the cooling components, respectively. When the temperature of the battery surface is less than a second preset temperature value, the control element can control the first and second three-way valves to connect to the heating components, respectively. When the outlet temperature of the cooling module is greater than a third preset temperature value, the control element can control the fan to increase its speed so that the outlet temperature of the cooling module is less than the third preset temperature value.

[0008] In one embodiment, the heating component includes a liquid storage tank and a heating wire. The liquid storage tank is connected to a first three-way valve and a second three-way valve, respectively. The heating wire is disposed inside the liquid storage tank to heat the antifreeze inside the liquid storage tank, and the liquid storage tank has a heat preservation function.

[0009] In one embodiment, the working fluid is a phase change coolant.

[0010] In one embodiment, the liquid distribution section is tubular, and multiple liquid distribution sections are provided in each heat exchange chamber; or, the liquid distribution section is plate-shaped, and one or more parallel liquid distribution sections are provided in each heat exchange chamber; or, the liquid distribution sections are distributed in a three-dimensional spatial network.

[0011] In one embodiment, the liquid working fluid is disposed at the bottom of the heat exchange chamber, and a liquid suction core is attached to the inner wall of the heat exchange chamber. One end of the liquid suction core is immersed in the liquid working fluid, and the other end extends toward the top of the heat exchange chamber.

[0012] In one embodiment, the battery includes multiple cells, multiple heat exchange sections arranged along a first preset direction, and the heat exchange sections and cells are arranged alternately. Multiple liquid distribution sections are provided within the heat exchange chamber of each heat exchange section, and the multiple liquid distribution sections within the same heat exchange chamber are evenly spaced along a second preset direction, which is perpendicular to the first preset direction.

[0013] In one embodiment, the inlet collection section is provided with a plurality of first mounting holes corresponding to the liquid distribution section, and the outlet collection section is provided with a plurality of second mounting holes corresponding to the liquid distribution section. The two ends of the liquid distribution section are respectively inserted into the first mounting holes and the second mounting holes, and the two ends of the liquid distribution section are respectively sealed and welded to the inlet collection section and the outlet collection section.

[0014] Compared with existing technologies, the new energy battery thermal management system provided in this application, when the battery temperature is too high (set to be greater than a first preset temperature value), allows the liquid working fluid to absorb heat from the battery surface and transform into a gaseous working fluid because the heat exchange section is attached to the battery surface, thus lowering the battery temperature below the first preset temperature value. Furthermore, because the antifreeze circulation device can cool the antifreeze and allow the low-temperature antifreeze to enter each distribution section through the inlet manifold, and the distribution section passes through the heat exchange chamber, the gaseous working fluid can re-condense into a liquid working fluid on the surface of the distribution section, thereby completing the heat exchange between the working fluid and the antifreeze. Finally, the antifreeze in the distribution section flows back to the antifreeze circulation device through the outlet manifold.

[0015] When the battery temperature is too low (set to be below the second preset temperature value), the antifreeze circulation device heats the antifreeze, allowing the high-temperature antifreeze to enter each distribution section through the inlet manifold. Because the distribution sections pass through the heat exchange chamber and are partially immersed in the working fluid, the high-temperature antifreeze causes the liquid working fluid to absorb heat and transform into a gaseous state. Furthermore, because the heat exchange section is attached to the battery surface, the gaseous working fluid condenses on the battery surface and releases heat, raising the battery temperature above the second preset temperature value. Finally, the antifreeze in the distribution sections flows back into the antifreeze circulation device through the outlet manifold.

[0016] Since the heat exchange section of the thermal management system for new energy batteries is a heat pipe structure, and because the heat pipe structure has good temperature uniformity, specifically, the boiling point (or freezing point) of the working fluid is fixed, and because the heat absorbed by a unit working fluid phase change is also the same, and the higher the battery surface temperature, the more heat is carried away by the evaporation of the working fluid, until the battery surface temperature drops below the preset temperature value, this setting can ensure effective cooling of the battery and uniformity of the battery surface temperature. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology 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.

[0018] Figure 1 A system connection diagram of a new energy battery thermal management system according to an embodiment of this application;

[0019] Figure 2 A partial structural schematic diagram of a new energy battery thermal management system according to an embodiment of this application;

[0020] Figure 3 for Figure 2 Exploded view;

[0021] Figure 4 for Figure 2 A sectional view.

[0022] Reference numerals: 100, battery; 110, battery cell; 200, liquid inlet manifold; 210, first mounting hole; 300, liquid outlet manifold; 400, liquid distribution section; 500, heat exchange section; 510, heat exchange chamber; 600, antifreeze circulation device; 610, liquid pump; 620, refrigeration component; 621, fan; 622, cooling module; 630, heating component; 631, liquid storage tank; 632, heating wire; 640, first three-way valve; 650, second three-way valve; 700, working fluid; 800, fixing frame. Detailed Implementation

[0023] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0024] Furthermore, 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 indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0025] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0026] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0027] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the specification of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0029] New energy vehicle batteries generate a significant amount of heat during fast charging and other operating conditions. Inadequate thermal management can lead to insufficient heat dissipation, potentially causing thermal runaway, fire, or even explosion. Current battery thermal management systems primarily rely on refrigerant (automotive antifreeze) to indirectly dissipate heat from the battery's surface contact areas. However, the refrigerant operates in a single-phase state, and factors such as the order in which it reaches different parts of the battery and variations in its flow rate result in inconsistent heat dissipation across different areas. This leads to uneven temperature distribution on the battery surface, potentially impacting battery lifespan. Furthermore, under fast charging conditions, significant temperature differences between different parts of the battery surface can cause overcharging or over-discharging.

[0030] Please see Figures 1-4To address the issue that different battery cells 100 cannot achieve uniform heat dissipation through existing battery 100 thermal management systems, this application provides a new energy battery thermal management system. This system includes an inlet manifold 200, a distributor 400, an outlet manifold 300, a heat exchanger 500, and an antifreeze circulation device 600. The inlet manifold 200 is connected to the outlet manifold 300 via multiple distributors 400, and the inlet end of the inlet manifold 200 and the outlet end of the outlet manifold 300 are connected to the antifreeze circulation device 600. The heat exchanger 500 is attached to the surface of the battery 100 and contains a closed heat exchange chamber 510 containing a uniformly distributed working fluid 700. The liquid distribution section 400 is disposed through the heat exchange chamber 510, and the liquid distribution section 400 is partially immersed in the working medium 700. When the temperature of the surface of the battery 100 is greater than a first preset temperature value, the working medium 700 can change from a liquid state to a gaseous state and condense on the surface of the liquid distribution section 400 and the upper wall of the heat exchange chamber 510 where the liquid working medium 700 is exposed. When the temperature of the surface of the battery 100 is less than a second preset temperature value, the liquid distribution section 400 immersed in the liquid working medium 700 can heat the working medium 700, so that the working medium 700 changes from a liquid state to a gaseous state and condenses on the inner wall of the heat exchange chamber 510. In addition, the liquid inlet collector 200 can heat the lower surface of the battery 100, and the liquid outlet collector 300 can heat the upper surface of the battery 100.

[0031] It should be noted that the antifreeze circulation equipment 600 refers to equipment that cools or heats the antifreeze.

[0032] Furthermore, it can be understood that the volume of the liquid working fluid 700 is smaller than the volume of the heat exchange chamber 510, so as to provide sufficient space for the working fluid 700 to vaporize, and the liquid working fluid 700 cannot submerge the entire liquid distribution section 400, so that the gaseous working fluid 700 can condense on the surface of the liquid distribution section 400.

[0033] When the temperature of the battery 100 is too high (set to be higher than the first preset temperature value), because the heat exchange section 500 is attached to the surface of the battery 100, the liquid working fluid 700 can absorb the heat from the surface of the battery 100 and turn into gaseous working fluid 700, so that the temperature of the battery 100 is lower than the first preset temperature value. Furthermore, because the antifreeze circulation device 600 can cool the antifreeze and allow the low-temperature antifreeze to enter each distribution section 400 through the inlet manifold 200, and the distribution section 400 passes through the heat exchange chamber 510, the gaseous working fluid 700 can re-condense into liquid working fluid 700 on the surface of the distribution section 400, thereby completing the heat exchange between the working fluid 700 and the antifreeze. Finally, the antifreeze in the distribution section 400 will flow back into the antifreeze circulation device 600 through the outlet manifold 300.

[0034] When the temperature of the battery 100 is too low (set to be below the second preset temperature value), the antifreeze circulation device 600 heats the antifreeze, allowing the high-temperature antifreeze to enter each distribution section 400 through the inlet manifold 200. Since the distribution sections 400 pass through the heat exchange chamber 510 and are partially immersed in the working fluid 700, the high-temperature antifreeze causes the liquid working fluid 700 to absorb heat and transform into a gaseous state. Because the heat exchange section 500 is attached to the surface of the battery 100, the gaseous working fluid 700 condenses on the surface of the battery 100 and releases heat to the battery 100, raising its temperature above the second preset temperature value. Finally, the antifreeze in the distribution sections 400 flows back to the antifreeze circulation device 600 through the outlet manifold 300.

[0035] Since the heat exchange section 500 of the new energy battery thermal management system is a heat pipe structure, and because the heat pipe structure has good temperature uniformity, specifically, the boiling point (or freezing point) of the working fluid 700 is fixed, and because the heat absorbed by the phase change of a unit of working fluid 700 is also the same, and the higher the surface temperature of the battery 100, the more heat is carried away by the evaporation of the working fluid 700, until the surface temperature of the battery 100 drops below the preset temperature value, this setting can ensure the effective cooling of the battery 100 and the uniformity of the surface temperature of the battery 100.

[0036] In one embodiment, the heat exchange chamber 510 is a vacuum environment. This prevents non-condensable gases from reacting with the inner wall of the heat exchange chamber 510. Furthermore, this configuration allows for control of the boiling point of the working fluid 700 within the heat exchange chamber 510.

[0037] In one embodiment, the working fluid 700 is a phase change coolant.

[0038] Specifically, phase change coolants include water, fluorocarbons, and hydrocarbons. These include acetone, ethanol, and fluorinated liquids, etc. The boiling points of fluorocarbons and hydrocarbons are both between -88℃ and 50℃. Among them, the boiling point of fluorinated liquids is around 58℃.

[0039] In one embodiment, such as Figure 3 and Figure 4 As shown, the liquid distribution section 400 is tubular, and multiple liquid distribution sections 400 are provided inside each heat exchange chamber 510.

[0040] This facilitates the assembly of the liquid distribution section 400, the inlet liquid collection section 200, and the outlet liquid collection section 300.

[0041] Furthermore, in one embodiment, the cross-section of the tubular dispensing portion 400 is circular, elliptical, or rectangular, but is not limited thereto. In other embodiments, the cross-section of the dispensing portion 400 may also be other shapes, which will not be listed here.

[0042] In another embodiment, the liquid distribution section 400 is in the shape of a thin plate, and one or more parallel liquid distribution sections 400 are provided inside each heat exchange chamber 510.

[0043] This greatly increases the contact area with the gaseous working fluid 700, thereby improving the heat exchange efficiency of the new energy battery thermal management system.

[0044] In another embodiment, the liquid dispensing section 400 is arranged in a three-dimensional spatial network.

[0045] This greatly increases the adhesion area of ​​the working fluid 700 on the surface of the liquid separator 400, thereby significantly enhancing the heat exchange efficiency of the new energy battery thermal management system.

[0046] In one embodiment, the ratio of the volume of the working fluid 700 in each heat exchange chamber 510 to the surface area of ​​the battery 100 corresponding to that heat exchange chamber 510 is the same.

[0047] It should be noted that the surface area of ​​the battery 100 corresponding to the heat exchange cavity 510 refers to the area of ​​the outer surface of the battery 100 that is in direct contact with the outer surface of any heat exchange section 500.

[0048] Furthermore, in one embodiment, the liquid working fluid 700 is disposed at the bottom of the heat exchange cavity 510, and a liquid suction core (not shown) is attached to the inner wall of the heat exchange cavity 510. One end of the liquid suction core is immersed in the liquid working fluid 700, and the other end extends toward the top of the heat exchange cavity 510.

[0049] In this way, the entire inner wall of the heat exchange chamber 510 can be in contact with the liquid working medium 700, which makes it easy for the battery 100 to release heat to the liquid working medium 700 in a timely manner through the heat exchange section 500. In addition, by setting the liquid wick, the liquid working medium 700 will not fill the entire space of the heat exchange chamber 510, thus providing sufficient space for the working medium 700 to vaporize.

[0050] In one embodiment, such as Figure 3 and Figure 4 As shown, the battery 100 includes a plurality of battery cells 110, a plurality of heat exchange sections 500 arranged along a first preset direction, and the plurality of battery cells 110 arranged along the first preset direction, and the heat exchange sections 500 and battery cells 110 are arranged alternately.

[0051] This configuration greatly improves the heat exchange efficiency among the battery 100, heat exchange section 500, and liquid distribution section 400, and also reduces the assembly difficulty of the heat exchange section 500 and the battery 100.

[0052] Furthermore, in one embodiment, the heat exchange section 500 is in the shape of a thin plate, and the thickness a of the heat exchange section 500 along the first preset direction and the thickness b of the battery cell 110 along the first preset direction satisfy 5a≤b.

[0053] This reduces the thickness of the heat exchange section by 500, thereby reducing the overall volume of the new energy battery thermal management system.

[0054] In one embodiment, such as Figure 3 As shown, each heat exchange section 500 has multiple liquid distribution sections 400 passing through its heat exchange cavity 510. Furthermore, the multiple liquid distribution sections 400 passing through the same heat exchange cavity 510 are evenly spaced along a second preset direction, and the second preset direction is perpendicular to the first preset direction.

[0055] It should be noted that when the battery cell 110 is cylindrical, the first preset direction and the second preset direction are concentric circles.

[0056] This further improves the heat exchange uniformity of the new energy battery thermal management system.

[0057] Specifically, multiple square-shaped battery cells 110 are arranged at equal intervals along the thickness direction (first preset direction) of the battery cells 110, and thin-plate heat exchange sections 500 are staggered between adjacent battery cells 110.

[0058] In one embodiment, such as Figure 3 As shown, the inlet collection section 200 is provided with a plurality of first mounting holes 210 corresponding to the liquid distribution section 400, and the outlet collection section 300 is provided with a plurality of second mounting holes (not shown) corresponding to the liquid distribution section 400. The two ends of the liquid distribution section 400 are respectively inserted into the first mounting holes 210 and the second mounting holes, and the two ends of the liquid distribution section 400 are respectively sealed and welded to the inlet collection section 200 and the outlet collection section 300.

[0059] This design greatly reduces the installation difficulty of the inlet liquid collection section 200, the liquid distribution section 400, and the outlet liquid collection section 300.

[0060] In one embodiment, such as Figure 1 As shown, the antifreeze circulation device 600 includes a liquid pump 610, a refrigeration component 620, a heating component 630, a first three-way valve 640, and a second three-way valve 650. The liquid outlet manifold 300 is connected to the liquid pump 610. The liquid pump 610 is connected to the refrigeration component 620 and the heating component 630 respectively through the first three-way valve 640. The refrigeration component 620 and the heating component 630 are respectively connected to the second three-way valve 650 and connected to the liquid inlet end of the liquid inlet manifold 200 through the second three-way valve 650, so as to form an antifreeze circulation loop.

[0061] This improves the cooling or heating efficiency of the antifreeze circulation equipment 600.

[0062] Specifically, in one embodiment, such as Figure 1As shown, the cooling assembly 620 includes a fan 621 and a cooling module 622. The cooling module 622 is connected to a first three-way valve 640 and a second three-way valve 650. The fan 621 is located on one side of the cooling module 622 to drive airflow to dissipate heat from the antifreeze inside the cooling module 622. It should be noted that the cooling module 622 can be either a finned heat sink or a microchannel heat exchanger.

[0063] However, this is not the only embodiment; in other embodiments, the refrigeration assembly 620 also includes a compressor and a throttling element. This further improves the refrigeration efficiency of the refrigeration assembly 620.

[0064] In one embodiment, the antifreeze circulation device 600 further includes a first temperature sensor (not shown), a second temperature sensor (not shown), and a control element (not shown). The control element is electrically connected to a first three-way valve 640, a second three-way valve 650, and the first temperature sensor, respectively. The first temperature sensor is located on the surface of the battery 100, and the second temperature sensor is located at the outlet of the cooling module 622. When the surface temperature of the battery 100 is greater than a first preset temperature value, the control element can control the first three-way valve 640 and the second three-way valve 650 to connect to the cooling component 620, respectively. When the surface temperature of the battery 100 is less than the second preset temperature value, the control element can control the first three-way valve 640 and the second three-way valve 650 to connect to the heating component 630, respectively. When the outlet temperature of the cooling module 622 is greater than a third preset temperature value, the control element can control the fan 621 to increase its speed so that the outlet temperature of the cooling module 622 is less than the third preset temperature value.

[0065] This greatly improves the control efficiency and intelligence of the thermal management system for new energy batteries.

[0066] Specifically, in one embodiment, such as Figure 1 As shown, the heating component 630 includes a liquid storage tank 631 and a heating wire 632. The liquid storage tank 631 is connected to a first three-way valve 640 and a second three-way valve 650. The heating wire 632 is disposed in the liquid storage tank 631 to heat the antifreeze in the liquid storage tank 631. The liquid storage tank 631 also has a heat preservation function.

[0067] It should be noted that the heating component 630 is mainly designed to address the issue of excessively low battery temperature during cold starts of the vehicle, while the cooling component 620 is primarily designed to address the issue of overheating of the battery 100 during fast charging and other operating conditions. Furthermore, the new energy battery thermal management system involved in this application can effectively dissipate the large amount of heat generated by the battery 100 during fast charging and other operating conditions, ensuring that the battery 100 remains within a relatively optimal temperature range under any operating condition. Simultaneously, due to the highly uniform temperature characteristics of the heat exchange section 500, the temperature difference between different parts of the battery 100 can be maintained within 2°C.

[0068] In one embodiment, such as Figure 1 As shown, the new energy battery thermal management system also includes a fixed frame 800, and the battery 100, heat exchange section 500, liquid inlet collection section 200 and liquid outlet collection section 300 are all installed in the fixed frame 800.

[0069] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0070] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the scope of protection of this application. Therefore, the patent protection scope of this application should be determined by the appended claims.

Claims

1. A thermal management system for a new energy battery, characterized in that, It includes an inlet manifold (200), a distributor (400), an outlet manifold (300), a heat exchanger (500), and an antifreeze circulation device (600). The inlet manifold (200) is connected to the outlet manifold (300) through multiple distributors (400), and the inlet end of the inlet manifold (200) and the outlet end of the outlet manifold (300) are connected to the antifreeze circulation device (600). The heat exchange section (500) is attached to the surface of the battery (100), and the heat exchange section (500) is provided with a closed heat exchange cavity (510), and the heat exchange cavity (510) is provided with a uniformly distributed working fluid (700). The liquid distribution section (400) passes through the heat exchange chamber (510), and the liquid distribution section (400) is partially immersed in the working fluid (700). When the temperature of the battery (100) surface is greater than a first preset temperature value, the working fluid (700) can change from a liquid state to a gaseous state and condense on the surface of the liquid distribution section (400) and the upper wall of the heat exchange chamber (510) where the liquid working fluid (700) is exposed; when the temperature of the battery (100) surface is less than a certain value... At the second preset temperature value, the liquid distribution section (400) immersed in the liquid working medium (700) can heat the working medium (700) so that the working medium (700) changes from liquid to gas and condenses on the inner wall of the heat exchange chamber (510). In addition, the liquid inlet collection section (200) can heat the lower surface of the battery (100), and the liquid outlet collection section (300) can heat the upper surface of the battery (100). The volume of the liquid working fluid (700) is smaller than the volume of the heat exchange chamber (510); A liquid working fluid (700) is disposed at the bottom of the heat exchange chamber (510). A liquid suction core is attached to the inner wall of the heat exchange chamber (510). One end of the liquid suction core is immersed in the liquid working fluid (700), and the other end extends toward the top of the heat exchange chamber (510). The working fluid (700) is a phase change coolant.

2. The new energy battery thermal management system according to claim 1, characterized in that, The antifreeze circulation device (600) includes a liquid pump (610), a refrigeration component (620), a heating component (630), a first three-way valve (640), and a second three-way valve (650). The liquid outlet manifold (300) is connected to the liquid pump (610). The liquid pump (610) is connected to the refrigeration component (620) and the heating component (630) respectively through the first three-way valve (640). The refrigeration component (620) and the heating component (630) are respectively connected to the second three-way valve (650) and connected to the inlet end of the liquid inlet manifold (200) through the second three-way valve (650) to form an antifreeze circulation loop.

3. The new energy battery thermal management system according to claim 2, characterized in that, The refrigeration component (620) includes a fan (621) and a cooling module (622). The cooling module (622) is connected to the first three-way valve (640) and the second three-way valve (650) respectively. The fan (621) is located on one side of the cooling module (622) to drive airflow to dissipate heat from the antifreeze in the cooling module (622).

4. The new energy battery thermal management system according to claim 3, characterized in that, The antifreeze circulation device (600) further includes a first temperature sensor, a second temperature sensor and a control element. The control element is electrically connected to the first three-way valve (640), the second three-way valve (650) and the first temperature sensor, respectively. The first temperature sensor is located on the surface of the battery (100), and the second temperature sensor is located at the outlet of the cooling module (622). When the temperature of the battery (100) surface is greater than the first preset temperature value, the control element can control the first three-way valve (640) and the second three-way valve (650) to connect to the refrigeration component (620) respectively. When the temperature of the battery (100) surface is less than the second preset temperature value, the control element can control the first three-way valve (640) and the second three-way valve (650) to connect to the heating component (630) respectively. When the liquid outlet temperature of the cooling module (622) is greater than the third preset temperature value, the control element can control the fan (621) to increase its speed so that the liquid outlet temperature of the cooling module (622) is less than the third preset temperature value.

5. The new energy battery thermal management system according to claim 2, characterized in that, The heating component (630) includes a liquid storage tank (631) and a heating wire (632). The liquid storage tank (631) is connected to the first three-way valve (640) and the second three-way valve (650) respectively. The heating wire (632) is located in the liquid storage tank (631) to heat the antifreeze in the liquid storage tank (631). The liquid storage tank (631) has a heat preservation function.

6. The new energy battery thermal management system according to claim 1, characterized in that, The liquid distribution section (400) is tubular, and multiple liquid distribution sections (400) are provided inside each heat exchange chamber (510). Alternatively, the liquid distribution section (400) is in the shape of a thin plate, and one or more parallel liquid distribution sections (400) are provided in each heat exchange chamber (510). Alternatively, the liquid distribution section (400) may be a three-dimensional spatially distributed network.

7. The new energy battery thermal management system according to claim 1, characterized in that, The battery (100) includes a plurality of cells (110), a plurality of heat exchange units (500) are arranged along a first preset direction, and the plurality of cells (110) are arranged along the first preset direction, and the heat exchange units (500) and cells (110) are arranged alternately. Each heat exchange section (500) has a plurality of liquid distribution sections (400) passing through its heat exchange chamber (510). The plurality of liquid distribution sections passing through the same heat exchange chamber (510) are evenly spaced along a second preset direction, and the second preset direction is perpendicular to the first preset direction.

8. The new energy battery thermal management system according to claim 1, characterized in that, The liquid inlet collection section (200) is provided with a plurality of first mounting holes (210) corresponding to the liquid distribution section (400), and the liquid outlet collection section (300) is provided with a plurality of second mounting holes corresponding to the liquid distribution section (400). The two ends of the liquid distribution section (400) are respectively inserted into the first mounting holes (210) and the second mounting holes, and the two ends of the liquid distribution section (400) are respectively sealed and welded to the liquid inlet collection section (200) and the liquid outlet collection section (300).

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