A hybrid radiator for a new energy vehicle battery

Abstract

The present invention belongs to the field of new energy vehicles, and provides a hybrid radiator for a new energy vehicle battery, which includes a heat exchanger, a fan, a circulation pump, a battery pack and a liquid cooling system. The battery pack includes a chassis, a top cover, a cold bridge bracket and side guard plates distributed on both sides of the cold bridge bracket. The liquid cooling system includes a liquid cooling top plate, a semiconductor refrigeration component, an inlet and outlet liquid cooling plate, a water inlet well box, an outlet pipe, a liquid cooling bottom plate and a liquid cooling partition plate. The liquid cooling partition plate includes an upper partition plate section and a lower partition plate section. Two adjacent liquid cooling partition plates are distributed between the cross gaps of four battery packs and on both side surface orientations. The present invention can use the liquid cooling partition plate to perform liquid cooling on the battery pack from the side of the battery pack. Coupled with the heat dissipation effects of the liquid cooling bottom plate and the liquid cooling top plate, and supplemented by the semi-conductor refrigeration that can be adjusted up and down, the heat dissipation performance of the battery pack can be effectively improved; the cold bridge formed by the cold bridge bracket can conduct heat dissipation partition on the inside of the battery pack, which can further improve the heat dissipation efficiency of the battery pack and is beneficial to extending the service life of the battery.

Description

Technical Field

[0001] The present invention belongs to the field of new energy vehicles, and particularly relates to a hybrid radiator for new energy vehicle batteries. Background Art

[0002] With the rise of the new energy vehicle technology industry, as the energy source, power batteries have become one of the important indicators for measuring the performance of new energy vehicles, and the heat dissipation performance of power batteries is directly related to the working efficiency and service life of power batteries.

[0003] Currently, in addition to heat exchangers and circulation pumps, for the part related to the battery pack of the radiator of automotive power batteries, a liquid cooling + air cooling design is adopted. For example, an electric vehicle battery box cooling device disclosed in Patent CN209607880U includes a battery box. A water cooling box is provided outside the battery box, and an air cooling box is provided outside the water cooling box. A heat conduction plate and heat dissipation fins are provided between the air cooling box and the water cooling box. The heat conduction plate is fixedly connected to the heat dissipation fins. The top of the water cooling box is fixedly connected with a water inlet pipe, and the top of the water inlet pipe is fixedly connected with a water inlet. The bottom of the water cooling box is fixedly connected with a water outlet pipe. The right end of the air cooling box is fixedly connected with an air inlet pipe. An air filter, a flow guide plate, and a fan are sequentially arranged in the air inlet pipe from left to right. A circular air valve is also provided between the flow guide plate and the fan, and the circular air valve is installed on the air inlet pipe. The left end of the air cooling box is fixedly connected with an air outlet pipe. The overall device initially cools the battery box through water cooling and realizes heat exchange of the water cooling box through air cooling. In addition, some battery packs of automotive power batteries also adopt a semiconductor refrigeration method. For example, an electric vehicle battery cooling system based on semiconductor thermoelectric technology in the field of electric vehicle technology disclosed in CN110336096B includes a battery module, a heat diffusion plate, a semiconductor thermoelectric module, a liquid cooling plate, a positioning bracket, a spring disc, a lower mounting plate, fastening bolts, and heat insulation materials. The heat diffusion plate is arranged below the battery module, the heat insulation material is located below the heat diffusion plate, the semiconductor thermoelectric module is installed on the heat insulation material, the positioning bracket is located below the heat insulation material, and the liquid cooling plate is installed on the positioning bracket. The heat diffusion plate and the lower mounting plate are connected together by fastening bolts.

[0004] The liquid cooling plate in the battery pack has a direct impact on the heat dissipation efficiency of the radiator of automotive power batteries. Currently, except for power batteries with cylindrical lithium batteries as battery units, which use internally interspersed heat dissipation belts to dissipate heat from the batteries, other batteries such as knife-shaped battery packs mostly adopt an outer packaging method, namely aluminum top plates, aluminum bottom plates, and aluminum side plates, to achieve liquid cooling heat dissipation. The heat dissipation efficiency of the latter form is lower than that of the former. Moreover, the high distribution density and single arrangement between battery packs are also not conducive to heat dissipation. Summary of the Invention

[0005] In view of the above technical problems existing in the heat dissipation of the power battery of new energy vehicles, the present invention proposes a hybrid radiator for new energy vehicle batteries with reasonable design, good heat dissipation performance and beneficial to extending the service life of the battery.

[0006] To achieve the above object, the technical solution adopted by the present invention is that a hybrid radiator for new energy vehicle batteries provided by the present invention includes a heat exchanger, a fan is arranged on the heat exchanger, a circulation pump and a battery pack are arranged at the supply end and the output end of the heat exchanger, a liquid cooling system is arranged inside the battery pack, the battery pack includes a chassis and a top cover, the liquid cooling system includes a liquid cooling top plate and a semiconductor refrigeration component arranged inside the top cover, a cold bridge bracket and side guard plates distributed on both sides of the cold bridge bracket are arranged on the chassis, the cold bridge bracket is in a U-shaped structure and includes a U-shaped section in the middle and support sections on both sides of the U-shaped section, the support sections are used to install battery packs and the battery packs on the support sections are distributed in a 2×n type, the U-shaped section forms a cold bridge between the battery packs on both sides thereof, the liquid cooling system further includes two inlet and outlet liquid cooling plates symmetrically distributed about the midline of the cold bridge bracket, the longitudinal section of the inlet and outlet liquid cooling plates is in a Z shape and a liquid inlet channel and a liquid outlet channel are arranged inside, a water inlet well box and a water outlet pipe communicated with the inlet and outlet liquid cooling plates are arranged below the U-shaped section, a liquid cooling bottom plate is arranged on the support section, a bottom plate circulation channel communicated with the liquid inlet channel and the liquid outlet channel is arranged inside the liquid cooling bottom plate, a plurality of liquid cooling partition plates distributed along the width direction of the battery pack are arranged on the liquid cooling bottom plate, a partition plate circulation channel communicated with the liquid inlet channel and the liquid outlet channel is arranged inside the liquid cooling partition plates, the liquid cooling partition plates include an upper partition plate section and a lower partition plate section, the cross section of the upper partition plate section is in a Z shape and the two turning points are right angles, the longitudinal section of the lower partition plate section is in an L shape and is connected with the tail end of the upper partition plate section to form a U-shaped structure with the opening facing the inlet and outlet liquid cooling plates, and adjacent two liquid cooling partition plates are distributed between the cross gaps of four battery packs and on both side surface positions.

[0007] Preferably, the inlet and outlet liquid cooling plates include a plurality of convex sections, the convex sections match the Z-shaped surface of the inlet and outlet liquid cooling plates, connection packages are arranged on the convex sections, the inlet and outlet liquid cooling plates are divided into upper and lower sections from the middle position of the connection packages and are respectively a liquid inlet channel and a liquid outlet channel, the top surface of the connection package is communicated with the end of the upper partition plate section, and the bottom surface of the connection package is communicated with the end of the lower partition plate section.

[0008] Preferably, a sink is arranged on the side surface of the connection package, two detection holes communicated with the liquid inlet channel and the liquid outlet channel are arranged on the sink surface of the sink, a pressure sensor is arranged in the sink, and two pressure probes corresponding to the detection holes one by one are arranged on the pressure sensor.

[0009] Preferably, the water outlet pipe includes a branch pipe communicating with the liquid outlet channel. The branch pipe horizontally penetrates through the U-shaped section, and the end of the branch pipe is arranged on the main pipe, and the end of the main pipe penetrates through the side guard plate.

[0010] Preferably, two symmetrically distributed top plate channels are arranged on the liquid cooling top plate. An internal circulation channel is arranged between the top plate channels, and an internal circulation pump is arranged on the internal circulation channel.

[0011] Preferably, the top plate channel is in a serpentine structure. A plurality of hollow openings are arranged on the liquid cooling top plate around the curved voids of the top plate channel. The semiconductor refrigeration component includes a moving plate. A lifting through opening corresponding to the position of the internal circulation pump is arranged on the moving plate. A plurality of thin oil cylinders are arranged on the top of the moving plate. The thin oil cylinders are located outside the top cover. A plurality of semiconductor refrigeration units corresponding to the hollow openings are arranged on the bottom of the moving plate.

[0012] Preferably, a sunk section is arranged at the joint of the U-shaped section and the support section. The tail of the inlet and outlet liquid cooling plate is arranged in the sunk section. An assembly opening for cooperating with the liquid cooling bottom plate is arranged on the support section. A cross beam is arranged in the assembly opening. A side opening is arranged at the position of the sunk section corresponding to the cross beam. The interior of the battery pack forms a communication relationship with the outside through the sunk section, the side opening and the assembly opening.

[0013] Preferably, the water inlet well box includes a box body. The side of the box body is communicated with the inlet and outlet liquid cooling plate. A filter element is arranged inside the box body. The box body is in a sunk head fit with the wellhead arranged on the U-shaped section. A plug plate is arranged on the top of the box body. A water inlet pipe is arranged on the bottom of the box body. The water inlet pipe penetrates through the side guard plate and extends towards the heat exchanger.

[0014] Preferably, the top view projection of the chassis is in a shape of a Chinese character 'hui'. The side of the chassis is an arched isosceles trapezoid structure, and the bottom edge of the top cover is nested with the chassis.

[0015] Preferably, a pair of stamping packages are arranged on the top cover. The space below the stamping packages provides an installation space for the electrical connection devices connecting the two sides of the cold bridge of the battery pack.

[0016] Compared with the prior art, the advantages and positive effects of the present invention are as follows:

[0017] 1. A hybrid radiator for a new energy vehicle battery provided by the present invention can perform liquid cooling and heat dissipation on the battery pack from the side of the battery pack by using a liquid cooling partition. Coupled with the heat conduction and heat dissipation effects of the liquid cooling bottom plate and the liquid cooling top plate, and supplemented by the lift-adjustable semiconductor refrigeration, the heat dissipation performance of the battery pack can be effectively improved. The heat bridge formed by the cold bridge bracket can conduct heat dissipation partitioning inside the battery pack, which can further improve the heat dissipation efficiency of the battery pack and is beneficial to extending the service life of the battery, making it suitable for large-scale promotion. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for description in the embodiments. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0019] Figure 1 FIG. is a schematic structural diagram of a hybrid radiator for a new energy vehicle battery provided for the embodiment;

[0020] Figure 2 FIG. is a cross-sectional view of a hybrid radiator for a new energy vehicle battery in the G-G direction;

[0021] Figure 3 FIG. is a side view of a battery pack and a liquid cooling system provided for the embodiment;

[0022] Figure 4 FIG. is a cross-sectional view of a battery pack and a liquid cooling system in the E-E direction provided for the embodiment;

[0023] Figure 5 FIG. is an axonometric view of the external structure of a battery pack provided for the embodiment;

[0024] Figure 6 FIG. is an assembly drawing of the internal structure of a battery pack provided for the embodiment;

[0025] Figure 7 FIG. is a working axonometric view of a partial structure of a liquid cooling system on a chassis provided for the embodiment;

[0026] Figure 8 FIG. is an exploded view of an inlet and outlet liquid cooling plate, a water inlet well box, a water outlet pipe, a liquid cooling bottom plate, and a liquid cooling partition;

[0027] Figure 9 FIG. is a front view of an inlet and outlet liquid cooling plate and a liquid cooling bottom plate;

[0028] Figure 10 FIG. is a schematic diagram of the distribution of a bottom plate circulation channel inside a liquid cooling bottom plate;

[0029] Figure 11 FIG. is a schematic diagram of the distribution of a partition circulation channel inside a liquid cooling partition;

[0030] Figure 12 is the bottom view of the liquid-cooled top plate and the semiconductor refrigeration component;

[0031] Figure 13 is the top view of the liquid-cooled top plate and the semiconductor refrigeration component;

[0032] In each of the above figures, 1, heat exchanger; 2, fan; 3, circulation pump; 4, battery pack; 41, chassis; 42, top cover; 421, stamping pack; 43, cold bridge bracket; 431, U-shaped section; 432, support section; 433, sunk section; 434, assembly port; 435, cross beam; 436, side opening; 44, side guard plate; 5, liquid cooling system; 51, liquid-cooled top plate; 511, top plate channel; 512, internal circulation channel; 513, hollow opening; 52, semiconductor refrigeration component; 521, moving plate; 522, lifting through opening; 523, thin cylinder; 524, semiconductor refrigeration unit; 53, inlet and outlet liquid-cooled plate; 531, inlet liquid channel; 532, outlet liquid channel; 533, raised section; 534, connecting pack; 535, sunk groove; 536, detection hole; 54, water inlet well box; 541, box body; 542, plug plate; 543, water inlet pipe; 55, water outlet pipe; 551, branch pipe; 552, main pipe; 56, liquid-cooled bottom plate; 561, bottom plate circulation channel; 57, liquid-cooled partition; 571, partition circulation channel; 572, upper partition section; 573, lower partition section; 6, pressure sensor; 7, internal circulation pump. Detailed implementation manners

[0033] In order to more clearly understand the above objects, features and advantages of the present invention, the present invention will be further described below with reference to the drawings and embodiments. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments may be combined with each other. For the convenience of narration, the words such as "upper", "lower", "left" and "right" hereinafter only represent the same directions as the upper, lower, left and right directions of the drawings themselves, and do not limit the structure.

[0034] Many specific details are set forth in the following description in order to fully understand the present invention. However, the present invention may be implemented in other ways different from those described herein. Therefore, the present invention is not limited by the limitations of the specific embodiments disclosed in the following specification.

[0035] Embodiment, such as Figures 1 to 13As shown in the figure, a hybrid radiator for a new energy vehicle battery provided by the present invention includes a heat exchanger 1, a fan 2 is arranged on the heat exchanger 1, a circulation pump 3 and a battery pack 4 are arranged at the supply end and the output end of the heat exchanger 1, and a liquid cooling system 5 is arranged inside the battery pack 4. Among them, the liquid cooling system 5 carries the heat of the battery pack inside the battery pack 4 to the heat exchanger 1, and the heat exchanger 1 cools and dissipates the heat of the liquid in the liquid cooling system 5 through liquid heat exchange and air heat exchange methods.

[0036] In order to improve the heat dissipation efficiency of the new energy vehicle battery, the battery pack 4 provided by the present invention includes a chassis 41 and a top cover 42. The liquid cooling system 5 includes a liquid cooling top plate 51 and a semiconductor refrigeration component 52 arranged inside the top cover 42. A cold bridge bracket 43 and side guards 44 distributed on both sides of the cold bridge bracket 43 are arranged on the chassis 41. The cold bridge bracket 43 is in a U-shaped structure and includes a U-shaped section 431 in the middle and support sections 432 on both sides of the U-shaped section 431. The support sections 432 are used to install the battery packs and the battery packs on the support sections 432 are distributed in a 2×n pattern. The U-shaped section 431 forms a cold bridge between the battery packs on both sides. The liquid cooling system 5 also includes two inlet and outlet liquid cooling plates 53 symmetrically distributed about the midline of the cold bridge bracket 43. The longitudinal section of the inlet and outlet liquid cooling plates 53 is in a Z shape and an inlet liquid channel 531 and an outlet liquid channel 532 are arranged inside. A water inlet well box 54 and an outlet pipe 55 communicating with the inlet and outlet liquid cooling plates 53 are arranged below the U-shaped section 431. A liquid cooling bottom plate 56 is arranged on the support section 432. A bottom plate circulation channel 561 communicating with the inlet liquid channel 531 and the outlet liquid channel 532 is arranged inside the liquid cooling bottom plate 56. A plurality of liquid cooling partitions 57 distributed in the width direction of the battery pack 4 are arranged on the liquid cooling bottom plate 56. A partition circulation channel 571 communicating with the inlet liquid channel 531 and the outlet liquid channel 532 is arranged inside the liquid cooling partitions 57. The liquid cooling partitions 57 include an upper partition section 572 and a lower partition section 573. The cross section of the upper partition section 572 is in a Z shape and the two turning points are right angles. The longitudinal section of the lower partition section 573 is in an L shape and its tail end is connected to the upper partition section 572 to form a U-shaped structure with an opening facing the inlet and outlet liquid cooling plates 53. Adjacent two liquid cooling partitions 57 are distributed between the cross gaps of four battery packs and on both side surfaces. Among them, the liquid cooling top plate 51, the liquid cooling bottom plate 56 and the liquid cooling partitions 57 are made of aluminum material, having good solid heat conduction and heat dissipation performance, and taking this as the basic condition for the conduction of the coolant, it can effectively ensure the reasonable flow and export of heat along with the liquid in the system channels.

[0037] Specifically, the inlet well box 54 is used to supply coolant to the inlet and outlet liquid cooling plates 53. The inlet and outlet liquid cooling plates 53 supply coolant to the liquid cooling partition 57 and the liquid cooling bottom plate 56 through the liquid inlet channel 531. The liquid cooling partition 57 and the liquid cooling bottom plate 56 exchange heat with the battery pack from the side and the bottom of the battery pack respectively. The cooled coolant returns to the inlet and outlet liquid cooling plates 53 and flows through the liquid outlet channel 532 to the outlet water pipe 55. The heated liquid in the inlet and outlet liquid cooling plates 53 is discharged uniformly by the outlet water pipe 55. After being heated, the liquid is cooled and dissipated heat through the heat exchanger 1 and the fan 2 and then enters the circulation system. Among them, the shape design feature of the liquid cooling partition 57 enables it to effectively pass through the side of the corresponding battery pack and form a circulation relationship with the inlet and outlet liquid cooling plates 53. At the same time, in the liquid cooling system 5, heat exchange is carried out on the top surface of the battery pack by the liquid cooling top plate 51 and the liquid inside the liquid cooling top plate 51. Moreover, when the heat dissipation power is insufficient and the heat dissipation period is long, the semiconductor cooling component 52 can be started to cool the battery pack from the top surface of the battery pack, so as to ensure the comprehensiveness of the coverage of the working surface of the liquid cooling system 5, and the heat dissipation principle has diversity, effectively improving the heat dissipation efficiency of the present invention.

[0038] Furthermore, the cold bridge bracket 43 and the chassis 41 are assembled into a support structure for assembling the battery pack and providing positioning conditions, so that the battery packs are arranged and distributed orderly in a 2×n pattern on the liquid cooling bottom plate 56. On the other hand, the battery packs are reasonably distributed in two parts on both sides of the U-shaped section 431, but it does not affect all the battery packs to form a charge-discharge power supply system in an electrically connected manner. The cold bridge formed by the cold bridge bracket 43 in this way can form a heat dissipation partition for the battery pack 4 in space, and the air flowing through below the cold bridge can take away part of the heat carried by the cold bridge, thereby improving the heat dissipation efficiency of the battery pack 4 and being beneficial to extending the actual service life of the power battery.

[0039] To improve the distribution and export performance of the cooling medium in the liquid-cooled plate 53 in and out of the system, the liquid-cooled plate 53 provided by the present invention includes a plurality of convex segments 533, the convex segments 533 match the Z-shaped surface of the liquid-cooled plate 53 in and out, connection packages 534 are arranged on the convex segments 533, the liquid-cooled plate 53 in and out is divided into upper and lower segments from the middle position of the connection package 534 and are respectively an inlet channel 531 and an outlet channel 532, the top surface of the connection package 534 communicates with the end of the upper partition segment 572, and the bottom surface of the connection package 534 communicates with the end of the lower partition segment 573. Among them, the connection package 534 provides obvious and reasonable connection nodes for the upper partition segment 572 and the lower partition segment 573, and the unit thickness of the connection package 534 and the convex segment 533 is greater than the thickness of other positions of the liquid-cooled plate 53 in and out. This is conducive to collecting a sufficient flow of liquid to flow towards the inlet end of the liquid-cooled partition 57, and differently from when entering, flowing from the outlet channel 532 to the outlet pipe 55. Further, there are two liquid paths entering the side for heat dissipation for every four battery packs, and the contact surface between the side of the battery pack and the liquid-cooled partition 57 is smaller than the contact surface between the battery pack and the liquid-cooled bottom plate 56. Therefore, by controlling the circulation flow rate of the cooling medium, there is still a margin for heat exchange for the cooling medium entering the bottom plate circulation channel 561 from the outlet channel 532. After continuous heat dissipation in the bottom circulation channel, the cooling medium returns to the outlet channel 532 near the discharge end position, which can effectively realize the heat dissipation of the bottom of the battery pack and improve the heat dissipation effect of the present invention.

[0040] To facilitate monitoring the flow pressure in the inlet channel 531 and the outlet channel 532 of the liquid-cooled plate 53 in and out, the present invention is provided with a sunk groove 535 on the side of the connection package 534, two detection holes 536 communicating with the inlet channel 531 and the outlet channel 532 are arranged on the groove surface of the sunk groove 535, and a pressure sensor 6 is arranged in the sunk groove 535. Two pressure probes corresponding to the detection holes 536 one by one are arranged on the pressure sensor 6. The pressure sensor 6 can monitor the flow pressure in the inlet channel 531 and the outlet channel 532 in real time. For the detection results with dynamic fluctuations exceeding the set range, they can be fed back to the central control system of the new energy vehicle to facilitate troubleshooting problems such as leakage or cooling medium to be replenished, thereby improving the stability and safety of the operation of the battery pack 4 and the liquid-cooling system 5.

[0041] To improve the circulation effect of the cooling medium after heating in the present invention, the outlet pipe 55 provided by the present invention includes a branch pipe 551 communicating with the liquid outlet channel 532. The branch pipe 551 horizontally penetrates the U-shaped section 431, and the end of the branch pipe 551 is arranged on the main pipe 552, and the end of the main pipe 552 penetrates through the side guard plate 44. Among them, the branch pipe 551 is distributed near the connection position between the water outlet end of the liquid cooling bottom plate 56 and the liquid inlet and outlet cooling plate 53, so that the water inlet end of the liquid cooling bottom plate 56 can have sufficient cooling medium supply. By arranging a plurality of branch pipes 551, the probability of blockage of a single branch pipe 551 can be reduced, and the conveying process can be completed in cooperation with the main pipe 552, which can increase the heat dissipation area to a certain extent and is beneficial to improving the heat dissipation effect of the battery pack 4.

[0042] To improve the self-cooling effect of the liquid cooling top plate 51, two symmetrically distributed top plate channels 511 are arranged on the liquid cooling top plate 51 provided by the present invention. An internal circulation channel 512 is arranged between the top plate channels 511, and an internal circulation pump 3 is arranged on the internal circulation channel 512. The cooling medium in the liquid cooling top plate 51 does not involve the liquid circulation outside the liquid cooling top plate 51, and the power is provided by the internal circulation pump 3, so that the cooling medium in the top plate channels 511 and the internal circulation channel 512 can complete the internal circulation by itself. Coupled with the aluminum heat dissipation effect and the natural air heat dissipation effect of the liquid cooling top plate 51, the heat dissipation of the top of the battery pack can be effectively realized.

[0043] To improve the working performance of the present battery pack 4, the top plate channel 511 provided by the present invention is of a serpentine structure. A plurality of hollow openings 513 are arranged on the liquid cooling top plate 51 around the bending voids of the top plate channel 511. The semiconductor refrigeration component 52 includes a moving plate 521. A lifting through hole 522 corresponding to the position of the internal circulation pump 3 is arranged on the moving plate 521. A plurality of thin oil cylinders 523 are arranged on the top of the moving plate 521. The thin oil cylinders 523 are supplied with pressure oil by the oil system of the new energy vehicle, and the thin oil cylinders 523 are located outside the top cover 42. A plurality of semiconductor refrigeration units 524 corresponding to the hollow openings 513 are arranged on the bottom of the moving plate 521. The semiconductor refrigeration unit 524 includes an insulating ceramic sheet, a metal conductor, a DC power supply, an N-type and a P-type semiconductor. In this way, for general working conditions, the semiconductor refrigeration unit 524 is not powered on and does not contact the battery pack. In the case where the circulating temperature of the cooling medium in the liquid cooling system 5 does not meet the standard, in addition to controlling the working intensity of the fan 2, the thin oil cylinders 523 can be controlled to be started by the central control system. The thin oil cylinders 523 drive the moving plate 521 to move downward until the semiconductor refrigeration unit 524 contacts the battery pack. The semiconductor refrigeration unit 524 is started and performs auxiliary heat dissipation and cooling on the surface of the battery pack, thereby improving the circulating temperature index of the cooling medium in the system, being beneficial to improving the working performance of the battery pack, and being beneficial to extending the actual service life of the battery pack.

[0044] Furthermore, the present invention is provided with a sunk section 433 at the junction of the U-shaped section 431 and the support section 432. The tail of the inlet and outlet liquid cooling plate 53 is arranged in the sunk section 433. An assembly port 434 for cooperating with the liquid cooling bottom plate 56 is arranged on the support section 432. A cross beam 435 is arranged in the assembly port 434. A side opening 436 is arranged at the position of the sunk section 433 corresponding to the cross beam 435. The interior of the battery pack 4 forms a communication relationship with the outside through the sunk section 433, the side opening 436 and the assembly port 434. Among them, the assembly port 434 provides effective and reliable installation conditions for the liquid cooling bottom plate 56. Under the condition that the cross beam 435 serves as a strengthening support, the aluminum liquid cooling bottom plate 56 itself can exchange heat with the air during the movement of the vehicle, and through the design of partially suspending some battery packs, it is beneficial to the heat exchange of the air and beneficial to heat dissipation. Individual side openings 436 can be used as aisles for the liquid cooling bottom plate 56 to communicate with the inlet and outlet liquid cooling plate 53. At the same time, the design of the sunk section 433 provides a stable support surface for the inlet and outlet liquid cooling plate 53, with a good positioning effect, which is beneficial to improving the installation reliability of the inlet and outlet liquid cooling plate 53.

[0045] In order to improve the utilization rate of the well water tank body 541, the water inlet well box 54 provided by the present invention includes a box body 541. The side of the box body 541 is communicated with the inlet and outlet liquid cooling plate 53. A filter element is arranged inside the box body 541. The box body 541 is in a sunk head type fit with the well opening arranged on the U-shaped section 431. A plug plate 542 is arranged at the top of the box body 541. A water inlet pipe 543 is arranged at the bottom of the box body 541. The water inlet pipe 543 extends towards the heat exchanger 1 through the side guard plate 44. Among them, the filter element can filter the cooling medium ready to enter the liquid inlet channel 531, which is beneficial to improving the circulation quality and flow efficiency of the cooling medium. The concealed design of the box body 541 does not affect the installation requirements of the electrical connection devices for connecting the battery packs on both sides of the cold bridge. Moreover, using the box body 541 as the supply structure directly docking the liquid inlet channel 531 has a larger cross section than the single pipe structure, which is beneficial to the distribution of the cooling medium from the inlet end of the liquid inlet channel 531 to the entire liquid inlet channel 531, so that all the liquid cooling partition plates 57 can obtain reasonable cooling medium to achieve liquid cooling.

[0046] In order to improve the structural strength of the battery pack 4, and considering the space requirements of the battery pack, the top projection of the base frame 41 provided by the present invention is in the shape of a Chinese character "回", the side of the base frame 41 is an arched isosceles trapezoidal structure, the bottom edge of the top cover 42 is nested with the base frame 41, and corresponding to the side of the base frame 41, the side guard plate 44 provides reasonable side protection for the battery pack 4. In this way, the top cover 42, the base frame 41, the cold bridge bracket 43 and the side guard plate 44 of the battery pack 4 can form an effective space with a relatively complete coverage surface, so as to facilitate the orderly installation of all battery packs, and the arched edges of the base frame 41 and the top cover 42 have diversified force-bearing surfaces, which can obtain better compressive and deformation resistance. In order to further improve the structural strengthening effect, the present invention also adopts a widened design of the bottom edge and the top edge at the edges of the top cover 42 and the base frame 41 to increase the force-bearing area of ​​the top cover 42 and the base frame 41, and the three-dimensional structure formed at the corner position has a higher structural strength than the simple two-dimensional structure.

[0047] In order to provide space for electrical connection devices connecting the battery packs, especially for the battery packs distributed on both sides of the I-shaped segment 431, the present invention provides a pair of stamping packages 421 formed by stamping on the top cover 42, and the recessed space formed below the stamping packages 421 provides an effective installation space for the electrical connection devices connecting the battery packs 4 on both sides of the cold bridge.

[0048] The above description is only a preferred embodiment of the present invention and does not limit the present invention in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes and apply it to other fields. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A hybrid radiator for new energy vehicle batteries, comprising a heat exchanger, a fan is arranged on the heat exchanger, a circulation pump and a battery pack are arranged at the supply end and the output end of the heat exchanger respectively, and a liquid cooling system is arranged inside the battery pack, characterized in that: The battery pack includes a base frame and a top cover, the liquid cooling system includes a liquid cooling top plate and a semiconductor refrigeration component arranged inside the top cover, a cold bridge bracket and side guard plates distributed on both sides of the cold bridge bracket are arranged on the base frame, the cold bridge bracket is a "J"-shaped structure and includes a "J"-shaped segment located in the middle and support segments located on both sides of the "J"-shaped segment, the support segment is used to install battery packs and the battery packs on the support segment are distributed in a 2×n shape, the "J"-shaped segment constitutes a cold bridge between the battery packs on both sides thereof, the liquid cooling system also includes two inlet and outlet liquid cooling plates symmetrically distributed about the center line of the cold bridge bracket, the longitudinal section of the inlet and outlet liquid cooling plates is Z-shaped and a liquid inlet channel and a liquid outlet channel are arranged inside thereof, and a liquid inlet and outlet channel connected to the inlet and outlet liquid cooling plate is arranged below the "J"-shaped segment. The support section is provided with a liquid-cooling bottom plate, and a bottom plate circulation channel connected to the liquid inlet channel and the liquid outlet channel is provided inside the liquid-cooling bottom plate. A plurality of liquid-cooling baffles distributed along the width direction of the battery pack are provided on the liquid-cooling bottom plate, and a baffle circulation channel connected to the liquid inlet channel and the liquid outlet channel is provided inside the liquid-cooling baffle. The liquid-cooling baffle comprises an upper baffle section and a lower baffle section, and the cross section of the upper baffle section is Z-shaped and its two turning points are right angles, and the longitudinal section of the lower baffle section is L-shaped and it is connected with the tail end of the upper baffle section to form a U-shaped structure with an opening facing the inlet and outlet liquid-cooling plate, and two adjacent liquid-cooling baffles are distributed between the cross gaps of the four battery packs and on the two side surfaces; The inlet and outlet liquid cooling plate comprises a plurality of raised sections, the raised sections match the Z-shaped surface of the inlet and outlet liquid cooling plate, a connection bag is arranged on the raised sections, the inlet and outlet liquid cooling plate is divided into an upper and lower section from the middle position of the connection bag, and the upper and lower sections are respectively a liquid inlet channel and a liquid outlet channel, the top surface of the connection bag is connected to the end of the upper baffle section, and the bottom surface of the connection bag is connected to the end of the lower baffle section; A sink is provided on the side of the connection package, two detection holes connected to the liquid inlet channel and the liquid outlet channel are provided on the sink surface, a pressure sensor is provided in the sink, and two pressure probes corresponding to the detection holes are provided on the pressure sensor; A countersunk section is provided at the junction of the Chinese-J-shaped section and the supporting section, the tail of the inlet and outlet liquid cooling plate is provided in the countersunk section, an assembly opening cooperating with the liquid cooling bottom plate is provided on the supporting section, a cross beam is provided in the assembly opening, and a side opening is provided on the countersunk section at a position corresponding to the cross beam, and the interior of the battery pack is connected with the outside world through the countersunk section, the side opening and the assembly opening.

2. A new energy vehicle battery hybrid radiator according to claim 1, characterized in that: The water outlet pipe comprises a branch pipe connected with the liquid outlet channel, the branch pipe horizontally passes through the "J"-shaped section, the end of the branch pipe is arranged on the main pipe, and the end of the main pipe passes through the side guard plate.

3. A new energy vehicle battery hybrid radiator according to claim 1, characterized in that: The liquid cooling top plate is provided with two symmetrically distributed top plate channels, an inner circulation channel is provided between the top plate channels, and an inner circulation pump is provided on the inner circulation channel.

4. A new energy vehicle battery hybrid radiator according to claim 3, characterized in that: The top plate channel is a serpentine structure. A plurality of hollow openings are arranged on the liquid-cooled top plate and are distributed around the bending voids of the top plate channel. The semiconductor refrigeration component includes a moving plate. A lifting through opening corresponding to the position of the internal circulation pump is arranged on the moving plate. A plurality of thin oil cylinders are arranged on the top of the moving plate. The thin oil cylinders are located outside the top cover. A plurality of semiconductor refrigeration units corresponding to the hollow openings are arranged on the bottom of the moving plate.

5. A new energy vehicle battery hybrid radiator according to claim 1, characterized in that: The water inlet well box includes a box body. The side surface of the box body is communicated with the liquid inlet and outlet cooling plate. A filter element is arranged inside the box body. The box body is in a sunk head fit with the wellhead arranged on the U-shaped section. A plug plate is arranged on the top of the box body. A water inlet pipe is arranged on the bottom of the box body. The water inlet pipe extends towards the heat exchanger through the side guard plate.

6. A hybrid radiator for new energy vehicle batteries according to any one of claims 1 to 5, characterized in that: The top view projection of the chassis is in a square shape with a hollow center. The side surface of the chassis is an isosceles trapezoidal structure with an arch. The bottom edge of the top cover is nested with the chassis.

7. A new energy vehicle battery hybrid radiator according to claim 6, characterized in that: A pair of stamping packages are arranged on the top cover. A mounting space is provided below the stamping packages for the electrical connection devices connecting the battery packages on both sides of the cold bridge.

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