New energy power battery heat dissipation device

Abstract

According to the new energy power battery heat dissipation device, a battery cavity is formed in the middle of the interior of a battery box, a plurality of lower cooling pipe sets with different cooling directions are laid on the inner bottom face of the battery cavity, and the lower cooling pipe sets make contact with the bottom face of a power battery pack arranged in the battery cavity through lower heat conduction plates; the interior of the cooling liquid box is divided into two independent cooling liquid cavities, and the cooling liquid box is mounted in the mounting cavity; the battery box cover is detachably fixed at the top opening position of the battery box; a plurality of upper cooling pipe groups which correspond to the positions of the plurality of power battery packs below the battery box cover and have different cooling directions are laid on the bottom surface of the battery box cover, the upper cooling pipe groups are in contact with the top surfaces of the power battery packs through upper heat conducting plates, and the upper cooling pipe groups and the lower cooling pipe groups above and below the two rows of power battery packs are respectively communicated with the cooling liquid box on the same side; and an air cooling device is arranged on the battery box cover. According to the invention, the defect that the fluid inlet is cold and the fluid outlet is hot in the heat exchange process of the conventional cooling structure is overcome, and the uniformity of the surface temperature of the power battery pack in the heat exchange and heat dissipation process is ensured.

Description

Technical Field

[0001] The present invention belongs to the technical field of automotive power battery heat dissipation, and in particular relates to a new energy power battery heat dissipation device. Background Art

[0002] As the primary energy storage element in electric vehicles, the battery module is a critical component that directly impacts their performance. During use, the internal resistance of the battery cells within the battery module generates heat, raising the internal temperature of the module. The normal operating temperature range for the battery cells is 15-35°C. Exceeding 60°C poses a safety hazard. The generation and rapid accumulation of heat inevitably raises the internal temperature of the battery. This is especially true when used in high-temperature environments or during high-current charging and discharging, potentially triggering vigorous chemical reactions within the battery, generating significant amounts of heat. If heat cannot dissipate quickly and accumulates within the battery, it can cause leakage, gassing, smoking, and, in severe cases, violent combustion or even explosion. To mitigate this risk, heat dissipation within the battery module is necessary to prevent the cells from remaining at high temperatures for extended periods, which can affect performance and reduce their lifespan. Current heat dissipation methods used in electric vehicles include air cooling, liquid cooling, and heat pipes.

[0003] Heat pipe technology can meet the dual working requirements of high-temperature heat dissipation and low-temperature preheating of battery packs. It is sensitive to temperature changes and has good temperature uniformity. As a cooling system for battery packs, it has made certain developments. However, due to layout and volume limitations, the current common application methods in new energy power battery systems are air cooling and liquid cooling.

[0004] Air cooling uses a cooling fan to remove the heat absorbed by the radiator. It is relatively cheap and has a simple and convenient installation method, but it is greatly affected by the environment and other factors. For example, its heat dissipation performance will be greatly affected by rising temperatures or overclocking. Compared with air cooling, liquid cooling is more expensive, but has the advantages of low noise, stable cooling, and less dependence on the environment.

[0005] Liquid cooling mainly uses convection heat transfer to remove heat. However, during the heat exchange process, the fluid flow in the liquid cooling plate accumulates heat, and the fluid temperature rises along the way. It is often the case that the fluid inlet of the liquid cooling plate is cold and the outlet is hot, which causes uneven cooling surface temperature at the inlet and outlet of the equipment. Therefore, it is necessary to improve the above problems. Summary of the Invention

[0006] The technical problem solved by the present invention is: to provide a new energy power battery heat dissipation device, by optimizing the structure of the battery box, adopting an installation structure in which the power battery pack and the coolant tank belong to different cavities, thereby avoiding mutual interference between the temperatures of the two during use, and by optimizing the structure and coolant flow direction of the lower cooling tube group and the upper cooling tube group used to cool the power battery pack, the disadvantage of the conventional cooling structure that the fluid inlet is cold and the outlet is hot during the heat exchange process is solved, thereby ensuring the uniformity of the surface temperature of the power battery pack during the heat exchange and heat dissipation process.

[0007] The technical solution adopted by the present invention is as follows: a new energy power battery heat dissipation device includes a battery box and a battery box cover, wherein two rows of battery cavities for accommodating power battery packs are centrally provided inside the battery box, and multiple groups of lower cooling pipe groups with different cooling directions are laid on the bottom surface of the battery cavity, and the lower cooling pipe groups are in contact with the bottom surface of the power battery pack arranged in the battery cavity through a lower heat conducting plate; the battery box is provided with mounting cavities at two long sides, respectively located outside the battery cavity on the same side, and a coolant tank whose interior is divided into two separate cooling liquid chambers is installed in the mounting cavities; the battery box cover is detachably fixed to the top opening of the battery box and covers the corresponding power battery packs and corresponding parts of the coolant tank within the battery box; the battery box cover is provided with multiple groups of upper cooling pipe groups with different cooling directions corresponding to the multiple power battery packs below it, and the upper cooling pipe groups are in contact with the top surface of the power battery pack through an upper heat conducting plate, and the upper cooling pipe groups and lower cooling pipe groups above and below the two rows of power battery packs are respectively connected to the coolant tank on the same side; the battery box cover is provided with an air cooling device for cooling the coolant tank.

[0008] Among them, the lower cooling tube group and the upper cooling tube group each include two outer serpentine tubes and a middle serpentine tube distributed between the two outer serpentine tubes. The outer serpentine tube is a serpentine tube with multiple large U-shaped tube ends on one side connected to the adjacent small U-shaped tube ends on the other side through two parallel tubes. The middle serpentine tube is a serpentine tube with multiple U-shaped tubes of equal size on both sides connected to the adjacent U-shaped tube on the other side through two parallel tubes. The ends of the middle serpentine tube and the two outer serpentine tubes are respectively connected to the coolant tank through solenoid valves, and form a coolant flow to different cooling tube groups.

[0009] Furthermore, one cooling liquid chamber of the cooling liquid tank is connected to one end of the cooling main pipe I, and multiple cooling branch pipes I at the other end of the cooling main pipe I, each equipped with a solenoid valve, are respectively connected to one end of multiple outer serpentine tubes and the other end of multiple middle serpentine tubes in the lower cooling pipe group on the same side; another cooling liquid chamber of the cooling liquid tank is connected to one end of the cooling main pipe II, and multiple cooling branch pipes II at the other end of the cooling main pipe II, each equipped with a solenoid valve, are respectively connected to the other end of multiple outer serpentine tubes and one end of multiple middle serpentine tubes in the lower cooling pipe group on the same side; the two cooling liquid chambers in the cooling liquid tank are respectively an infusion chamber and a return chamber, and the infusion chamber and the return chamber circulate alternately according to the liquid level heights detected inside the two cooling liquid chambers.

[0010] Furthermore, the connection structure between the coolant tank and the outer serpentine tubes and the middle serpentine tubes in the upper cooling tube group in the same row is the same as the connection structure between the coolant tank and the lower cooling tube group, but the cooling main pipe I and the cooling main pipe II connected to the outer serpentine tubes and the middle serpentine tubes in the upper cooling tube group in the same row go around the inner wall of the coolant tank to the bottom of the coolant tank and are connected to the coolant tank.

[0011] Furthermore, the bottom of the installation cavity is a grille plate, and ventilation grilles are provided on the two side walls of the battery box and at corresponding positions of the coolant tank. A plurality of support plates with inclined surfaces facing the coolant tank are fixed on the outer and inner walls of the installation cavity, and the coolant tank with a horizontal side wall on one side and an inclined side on the other side is adapted to the installation cavity.

[0012] Furthermore, the cooling main pipe I and the cooling main pipe II connected to the outer serpentine pipe and the middle serpentine pipe in the upper cooling pipe group are routed around to the bottom of the coolant tank through the gap between two adjacent support plates.

[0013] Furthermore, the air cooling device includes a cooling fan, and the upper port of the battery box is equipped with a battery box cover with the same number as the battery cavities. The concave area on one side of the bottom surface of the battery box cover is the installation area of the upper cooling pipe group, and the concave area adjacent to the area is the cooling area corresponding to the upper and lower parts of the coolant tank. The cooling fan is installed on the battery box cover and the air outlet of the battery box cover is located in the cooling area. A reinforcing mesh plate is fixed on the side wall of the cooling area groove of the battery box cover, and two diversion mesh plates are symmetrically fixed on the reinforcing mesh plate for diverting the air sent out by the cooling fan to both sides.

[0014] Furthermore, one side of the battery box cover on the same side as the coolant tank is hinged to the battery box, and the other three sides of the battery box cover are fixed to the battery box by bolts. A handle is provided on the side of the battery box cover on the opposite side of the coolant tank.

[0015] The advantages of the present invention compared with the prior art are: 1. This technical solution optimizes the structure of the battery box and adopts an installation structure in which the power battery pack and the coolant tank belong to different cavities to avoid mutual interference between the temperatures of the two during use; 2. This technical solution optimizes the structure and coolant flow direction of the lower and upper cooling tube groups used to cool the power battery pack, solving the problem of cold fluid inlet and hot fluid outlet in conventional cooling structures during heat exchange, ensuring uniform surface temperature of the power battery pack during heat exchange and heat dissipation. 3. This technical solution increases the cooling and heat exchange area by arranging the lower cooling tube group and the upper cooling tube group on the bottom and bottom surfaces of the power battery pack. The arrangement of the lower heat conduction plate and the upper heat conduction plate can conduct the heat of the power battery pack to the lower cooling tube group and the upper cooling tube group, thereby improving the heat exchange efficiency and effect; 4. This technical solution has a simple structure, novel design, high heat exchange and heat dissipation efficiency, good temperature uniformity, and low cost. It provides a low-cost heat dissipation structure with good heat dissipation effect for new energy power batteries and has high use value. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic structural diagram of the battery box of the present invention when no power battery pack is installed; Figure 2 This is a schematic diagram of the internal structure of the battery box from the side of the present invention; Figure 3 This is a simplified diagram of the connection structure between the coolant tank and the lower cooling tube group or the upper cooling tube group of the present invention; Figure 4 This is a partial schematic diagram of the support plate of the present invention being arranged in the battery box; Figure 5 This is a schematic diagram of the planar structure of the battery box cover of the present invention; Figure 6 for Figure 5 Middle AA partial cross-sectional view; Figure 7 for Figure 5 Partial schematic diagram in the middle B direction. DETAILED DESCRIPTION

[0017] The following is a combination of the embodiments of the present invention Figure 1-7 The technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0018] It should be noted that, in this document, unless otherwise stated, it should be understood that the terms "center," "upper," "lower," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate positions or relationships based on those shown in the accompanying drawings. These are intended only to facilitate the description of the present invention and simplify the description, and are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0019] As used herein, the terms "comprises," "comprising," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, the phrase "comprising a..." does not preclude the presence of additional identical elements in the process, method, article, or apparatus that includes the elements.

[0020] New energy power battery cooling device, such as Figure 1-7As shown, it includes a battery box 1 and a battery box cover 2. Two rows of battery cavities 3 for accommodating power battery packs 4 are centrally provided inside the battery box 1. Multiple groups of lower cooling pipe groups 5 with different cooling directions are laid on the bottom surface of the battery cavity 3, and the lower cooling pipe group 5 is in contact with the bottom surface of the power battery pack 4 arranged in the battery cavity 3 through the lower heat conducting plate 6; the two long sides of the battery box 1 are provided with mounting cavities 8 respectively located outside the battery cavity 3 on the same side, and a coolant tank 7 with the interior divided into two separate cooling liquid cavities is installed in the mounting cavity 8; the battery box cover 2 is detachably fixed to the top opening position of the battery box 1, and the corresponding power battery packs 4 and the corresponding parts of the coolant tank 7 are sealed in the battery box 1; the bottom surface of the battery box cover 2 is provided with multiple groups of cooling pipes with different cooling directions corresponding to the multiple groups of power battery packs 4 below it. The upper cooling tube group 9 is provided, and the upper cooling tube group 9 is in contact with the top surface of the power battery pack 4 through the upper heat conducting plate 10. The upper cooling tube group 9 and the lower cooling tube group 5 above and below the two rows of power battery packs 4 are respectively connected to the coolant tank 7 on the same side; the battery box cover 2 is provided with an air cooling device for cooling the coolant tank 7; in the above structure, by optimizing the structure of the battery box 1, the power battery pack 4 and the coolant tank 7 are installed in different cavities to avoid mutual interference between the temperatures of the two during use; by optimizing the structure and coolant flow direction of the lower cooling tube group 5 and the upper cooling tube group 9 for cooling the power battery pack 4, the disadvantage of the conventional cooling structure having a cold fluid inlet and a hot fluid outlet during the heat exchange process is solved, thereby ensuring the uniformity of the surface temperature of the power battery pack 4 during the heat exchange and heat dissipation process; Among them, the specific structure of the lower cooling tube group 5 and the upper cooling tube group 9 is as follows: the lower cooling tube group 5 and the upper cooling tube group 9 each include two outer serpentine tubes 11 and a middle serpentine tube 12 distributed between the two outer serpentine tubes 11, the outer serpentine tube 11 is a serpentine tube with multiple large U-shaped tube ends on one side connected to the adjacent small U-shaped tube ends on the other side through two parallel tubes, and the middle serpentine tube 12 is a serpentine tube with multiple U-shaped tubes of equal size on both sides connected to the adjacent U-shaped tube on the other side through two parallel tubes, the ends of the middle serpentine tube 12 and the two outer serpentine tubes 11 are respectively connected to the coolant tank 7 through the solenoid valve 18, and form a coolant flow to different cooling tube groups.

[0021] like Figure 3As shown, one cooling liquid cavity of the coolant tank 7 is connected to one end of the cooling main pipe Ⅰ13, and a plurality of cooling branch pipes Ⅰ14 at the other end of the cooling main pipe Ⅰ13 are installed with solenoid valves 18 and are respectively connected to one end of a plurality of outer serpentine tubes 11 and the other end of a plurality of middle serpentine tubes 12 in the lower cooling pipe group 5 on the same side. Another cooling liquid cavity of the coolant tank 7 is connected to one end of the cooling main pipe Ⅱ15, and a plurality of cooling branch pipes Ⅱ16 at the other end of the cooling main pipe Ⅱ15 are installed with solenoid valves 18 and are respectively connected to the other end of a plurality of outer serpentine tubes 11 and one end of a plurality of middle serpentine tubes 12 in the lower cooling pipe group 5 on the same side. The two cooling liquid chambers are respectively an infusion chamber and a return chamber, and the infusion chamber and the return chamber circulate alternately according to the liquid level heights detected inside the two cooling liquid chambers; in the above structure, when the cooling liquid chamber on the left side of the cooling liquid tank 7 is the infusion chamber and the one on the right side is the return chamber, the cooling liquid in the infusion chamber of the cooling liquid tank 7 is in the same lower cooling tube group 5, of which two branches enter from the left end of the lower cooling tube group 5 and flow out to the return chamber through the right end after diversion, while the other enters from the right end and flows out of the return chamber from the left end, which can effectively avoid the disadvantages of the conventional cooling structure that the fluid inlet is cold and the outlet is hot during the heat exchange process, and ensure that the heat exchange effect of the power battery pack 4 is basically consistent.

[0022] The bottom of the mounting cavity 8 is a grid plate, and ventilation grilles 17 are provided on both side walls of the battery box 1 at positions corresponding to the coolant tank 7 to provide ventilation and heat dissipation effects. A plurality of support plates 19 with inclined surfaces facing the coolant tank 7 are fixed on the outer and inner walls of the mounting cavity 8. The coolant tank 7, which has a horizontal side wall on one side and an inclined surface on the other side, is adapted to the mounting cavity 8. Under the action of the two inclined surfaces, the coolant tank 7 is stably and reliably installed in the mounting cavity 8. When the battery box cover 2 is closed, the stability and reliability of the coolant tank 7 are greatly improved. The connection structure between the coolant tank 7 and the outer serpentine tube 11 and the middle serpentine tube 12 in the upper cooling tube group 9 in the same row is the same as the connection structure between the coolant tank 7 and the lower cooling tube group 5, but the cooling main pipe I13 and the cooling main pipe II15 connected to the outer serpentine tube 11 and the middle serpentine tube 12 in the upper cooling tube group 9 in the same row go around to the bottom of the coolant tank 7 through the inner wall of the coolant tank 7 and are connected to the coolant tank 7; wherein, the cooling main pipe I13 and the cooling main pipe II15 connected to the outer serpentine tube 11 and the middle serpentine tube 12 in the upper cooling tube group 9 go around to the bottom of the coolant tank 7 through the gap between the two adjacent support plates 19, and the cooling main pipe I13 and the cooling main pipe II15 can be appropriately lengthened to facilitate the opening of the battery box cover 2.

[0023] like Figures 5 to 7As shown, the specific structure of the air cooling device package is as follows: the air cooling device includes a heat dissipation fan 20, and the upper port of the battery box 1 is equipped with a battery box cover 2 with the same number as the battery cavity 3, and each power battery pack 4 is installed and maintained without affecting each other, and the concave area on one side of the bottom surface of the battery box cover 2 is the installation area of the upper cooling pipe group 9, and the concave area adjacent to the area is the heat dissipation area corresponding to the upper and lower parts of the coolant tank 7, the heat dissipation fan 20 is installed on the battery box cover 2 and the air outlet of the battery box cover 2 is located in the heat dissipation area, and a reinforcing mesh plate 22 is fixed on the side wall of the heat dissipation area groove of the battery box cover 2, and two diversion mesh plates 21 are symmetrically fixed on the reinforcing mesh plate 22 for diverting the wind sent out by the heat dissipation fan 20 to both sides, so that part of the wind sent out by the heat dissipation fan 20 blows downward, and the rest blows to both sides under the diversion guide of the two diversion mesh plates 21, thereby improving the uniformity of air cooling of the coolant tank 7 and improving the cooling efficiency.

[0024] like Figure 5 As shown, one side of the battery box cover 2 on the same side as the coolant tank 7 is hinged to the battery box 1, and the other three sides of the battery box cover 2 are fixed to the battery box 1 by bolts or locks. A handle 23 is provided on the panel surface of the battery box cover 2 on the opposite side of the coolant tank 7. The above-mentioned installation structure of the battery box cover 2 ensures the stability and reliability of the battery box cover 2 and the battery box 1 during vehicle transportation, and facilitates opening or fixing the battery box cover 2 during maintenance of the power battery pack 4; to avoid abnormal noise, a flexible pad can be provided between the battery box cover 2 and the battery box 1.

[0025] This technical solution increases the cooling and heat exchange area by arranging the lower cooling tube group 5 and the upper cooling tube group 6 on the bottom surface and the bottom surface of the power battery pack 4. The arrangement of the lower heat conducting plate 6 and the upper heat conducting plate 10 can conduct the heat of the power battery pack 4 to the lower cooling tube group 5 and the upper cooling tube group 9, thereby improving the heat exchange efficiency and effect; the structure is simple, the design is novel, the heat exchange and heat dissipation efficiency is high, the temperature uniformity is good, and the cost is low, providing a low-cost heat dissipation structure with good heat dissipation effect for new energy power batteries, and has high use value.

[0026] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0027] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. New energy power battery heat dissipation device, characterized by: The invention comprises a battery box (1) and a battery box cover (2), wherein two rows of battery cavities (3) for accommodating power battery packs (4) are centrally provided inside the battery box (1), and a plurality of lower cooling pipe groups (5) with different cooling directions are laid on the bottom surface of the battery cavity (3), and the lower cooling pipe groups (5) are in contact with the bottom surface of the power battery pack (4) arranged in the battery cavity (3) through the lower heat conducting plate (6); the battery box (1) is provided with mounting cavities (8) respectively located outside the battery cavity (3) on the same side at two long sides, and a coolant tank (7) whose interior is divided into two separate coolant cavities is installed in the mounting cavity (8); the battery box cover (2) is detachably fixed to the battery box (1). The top of the battery box (1) is opened, and the corresponding power battery pack (4) and the corresponding part of the coolant tank (7) are sealed in the battery box (1); a plurality of upper cooling pipe groups (9) with different cooling directions corresponding to the positions of the plurality of power battery packs (4) below are laid on the bottom surface of the battery box cover (2), and the upper cooling pipe groups (9) are in contact with the top surface of the power battery pack (4) through the upper heat conducting plate (10), and the upper cooling pipe groups (9) and lower cooling pipe groups (5) above and below the two rows of the power battery packs (4) are respectively connected to the coolant tank (7) on the same side; and an air cooling device for cooling the coolant tank (7) is provided on the battery box cover (2).

2. The new energy power battery heat dissipation device according to claim 1, characterized in that: The lower cooling tube group (5) and the upper cooling tube group (9) each include two outer serpentine tubes (11) and a middle serpentine tube (12) distributed between the two outer serpentine tubes (11). The outer serpentine tube (11) is a serpentine tube with multiple large U-shaped tube ends on one side connected to the adjacent small U-shaped tube ends on the other side through two parallel tubes. The middle serpentine tube (12) is a serpentine tube with multiple U-shaped tubes of equal size on both sides connected to the adjacent U-shaped tubes on the other side through two parallel tubes. The ends of the middle serpentine tube (12) and the two outer serpentine tubes (11) are respectively connected to the coolant tank (7) through solenoid valves (18), and form a coolant flow to different cooling tube groups.

3. The new energy power battery heat dissipation device according to claim 2, characterized in that: A cooling liquid chamber of the cooling liquid tank (7) is connected to one end of the cooling main pipe I (13), and a plurality of cooling branch pipes I (14) at the other end of the cooling main pipe I (13) are each equipped with a solenoid valve (18) and are respectively connected to one end of a plurality of outer serpentine tubes (11) and the other end of a plurality of middle serpentine tubes (12) in the lower cooling pipe group (5) on the same side. Another cooling liquid chamber of the cooling liquid tank (7) is connected to one end of the cooling main pipe II (15), and a plurality of cooling branch pipes II (16) at the other end of the cooling main pipe II (15) are each equipped with a solenoid valve (18) and are respectively connected to the other end of a plurality of outer serpentine tubes (11) and one end of a plurality of middle serpentine tubes (12) in the lower cooling pipe group (5) on the same side. The two cooling liquid chambers in the cooling liquid tank (7) are respectively an infusion chamber and a return chamber, and the infusion chamber and the return chamber circulate alternately according to the liquid level heights detected inside the two cooling liquid chambers.

4. The new energy power battery heat dissipation device according to claim 3, characterized in that: The connection structure between the coolant tank (7) and the outer serpentine tube (11) and the middle serpentine tube (12) in the upper cooling tube group (9) in the same row is the same as the connection structure between the coolant tank (7) and the lower cooling tube group (5), but the cooling main pipe I (13) and the cooling main pipe II (15) connected to the outer serpentine tube (11) and the middle serpentine tube (12) in the upper cooling tube group (9) in the same row are connected to the coolant tank (7) by passing through the inner wall of the coolant tank (7) and around to the bottom of the coolant tank (7).

5. The new energy power battery heat dissipation device according to claim 4, characterized in that: The bottom of the installation cavity (8) is a grid plate, and ventilation grids (17) are provided at positions corresponding to the two side walls of the battery box (1) and the coolant tank (7). A plurality of support plates (19) with inclined surfaces facing the coolant tank (7) are fixed on the outer and inner walls of the installation cavity (8), and the coolant tank (7) with a horizontal side wall on one side and an inclined side wall on the other side is adapted to be inside the installation cavity (8).

6. The new energy power battery heat dissipation device according to claim 5, characterized in that: The cooling main pipe I (13) and the cooling main pipe II (15) connected to the outer serpentine pipe (11) and the middle serpentine pipe (12) in the upper cooling pipe group (9) are wound around to the bottom of the coolant tank (7) through the gap between two adjacent support plates (19).

7. The new energy power battery heat dissipation device according to claim 1, characterized in that: The air cooling device includes a heat dissipation fan (20), the upper port of the battery box (1) is equipped with a battery box cover (2) with the same number as the battery chamber (3), the concave area on one side of the bottom surface of the battery box cover (2) is the installation area of the upper cooling pipe group (9), and the concave area adjacent to the area is the heat dissipation area corresponding to the upper and lower parts of the coolant tank (7), the heat dissipation fan (20) is installed on the battery box cover (2) and the air outlet of the battery box cover (2) is located in the heat dissipation area, a reinforcing mesh plate (22) is fixed on the side wall of the heat dissipation area groove of the battery box cover (2), and two diversion mesh plates (21) for diverting the air sent by the heat dissipation fan (20) to both sides are symmetrically fixed on the reinforcing mesh plate (22).

8. The new energy power battery heat dissipation device according to any one of claims 1 to 7, characterized in that: One side of the battery box cover (2) on the same side as the coolant tank (7) is hinged to the battery box (1), and the other three sides of the battery box cover (2) are fixed to the battery box (1) by bolts. A handle (23) is provided on a panel on the side opposite to the coolant tank (7).

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