A battery cooling device for new energy traction machines

Abstract

This invention relates to the technical field of battery heat dissipation for traction machines, and particularly to a battery heat dissipation device for new energy traction machines. The device includes an outer casing, a coolant circulator, a coolant circulation pipe assembly, an auxiliary air duct assembly, an air intake assembly, and battery cells. The coolant circulator is installed on the outside of the outer casing, while the coolant circulation pipe assembly is located inside the outer casing, with both ends penetrating the interior of the casing. Both ends of the coolant circulation pipe assembly are connected to the suction and return ends of the coolant circulator, respectively. The auxiliary air duct assembly is located inside the outer casing, with both ends penetrating the inner wall of the outer casing. This invention, by setting up the coolant circulation pipe assembly and the auxiliary air duct assembly, utilizes the flowing coolant to directly absorb heat from the battery cells, and uses the auxiliary air duct assembly to perform multi-stage air cooling of the absorbed coolant, ensuring the uniformity of the overall temperature of the battery cells.

Description

Technical Field

[0001] This invention relates to the technical field of battery heat dissipation for traction machines, and in particular to a battery heat dissipation device for new energy traction machines. Background Technology

[0002] A pure electric intelligent traction machine refers to a traction machine whose traction operation and power are driven by an electric motor, and whose driving power comes entirely from a rechargeable energy storage system (i.e., a rechargeable battery (such as a lead-acid battery, nickel-cadmium battery, nickel-metal hydride battery, or lithium-ion battery)). It integrates advanced technologies in power drive transmission control, intelligent control of collaborative operation of tensioning equipment for cable laying construction, and information transmission, forming a traction machine with advanced technical principles, new technologies and structures, and that meets the requirements of tension cable laying construction specifications.

[0003] Power source: This type of equipment is powered by a battery to drive a motor, realizing the process of converting electrical energy into mechanical energy, providing a power source for the movement and force transmission of the equipment, replacing the existing internal combustion engine method of converting chemical energy into mechanical energy.

[0004] The power battery is installed inside a suitable battery box. When the battery provides energy, it will generate heat according to the output power. If the heat is not dissipated in time, the high heat will affect the energy output efficiency of the battery.

[0005] In existing technologies, heat dissipation vents are installed or heat exchange is carried out through coolant to reduce the temperature inside the battery box.

[0006] However, existing heat dissipation technologies have the following drawbacks: With only a single cooling method, the heat exchange and absorption within the chamber is insufficient, and the heat in the flow section at the rear of the chamber cannot be fully absorbed. Summary of the Invention

[0007] To address the problems mentioned in the background art, the present invention provides a battery cooling device for a new energy traction machine.

[0008] The present invention provides a battery cooling device for a new energy traction machine, which adopts the following technical solution: including an outer casing, a coolant circulator, a coolant circulation pipe assembly, an auxiliary air duct assembly, an air intake assembly, and a battery unit.

[0009] The coolant circulator is installed on the outside of the outer casing.

[0010] The coolant circulation pipe assembly is located inside the outer casing, with both ends of the coolant circulation pipe assembly penetrating the interior of the outer casing. The two ends of the coolant circulation pipe assembly are respectively connected to the liquid extraction end and the liquid return end of the coolant circulator. The auxiliary air duct assembly is located inside the outer casing, with both ends of the auxiliary air duct assembly penetrating the inner wall of the outer casing. The coolant circulation pipe assembly is located inside the outer casing, with one end sleeved and installed at the other end of the coolant circulation pipe assembly located inside the outer casing. The air intake assembly is installed outside the outer casing and is connected to the air intake end of the auxiliary air duct assembly. The battery unit is provided in multiple ways and is installed inside the outer casing. The coolant circulation pipe assembly is fitted to the battery unit.

[0011] Optionally, the coolant circulation pipe assembly includes: The side tube plate is provided in two, and the battery unit is located between the side tube plates. The upper ends of the two side tube plates penetrate the inner wall of the outer casing. The two side tube plates are respectively connected to the liquid extraction end and the liquid return end of the coolant circulator. The bonding tube sheet is provided in multiple ways, and each battery cell is bonded between two adjacent bonding tube sheets. The bonding tube sheet material is a thermally conductive material.

[0012] Optionally, the auxiliary duct assembly includes; The lower air box is equipped with the battery unit on the upper side of the lower air box. The lower air box is connected to an exhaust box, which penetrates the inner wall of the outer casing. The air inlet duct assembly is located inside the outer casing and penetrates the inner wall of the outer casing. One end of the air inlet duct assembly is located outside the outer casing and is connected to the air inlet component. The air inlet duct assembly is located on the upper side of the battery unit. The heat sink is provided in multiple forms, with each bonding tube plate passing through multiple heat sinks in sequence. The two ends of the heat sink are connected to the air inlet duct assembly and the lower air box, respectively.

[0013] Optionally, the air intake assembly includes: Common ventilation box; Dust removal pipe assembly, wherein multiple dust removal pipe assemblies are provided, and both ends of the dust removal pipe assembly are respectively connected to the common ventilation box and the air inlet pipe assembly; Natural air box, wherein the natural air box is installed at the end of the common air box away from the dust collection pipe assembly; A power air box, wherein a power fan assembly is installed inside the power air box, the power air box is installed on the upper side of the natural air box, and the power air box is connected to the common air box; A temperature detection controller is installed on the upper side of the outer casing. The temperature detection controller can detect the internal temperature of the outer casing. After detecting that the internal temperature of the outer casing reaches a critical value, the temperature detection controller controls the power fan assembly of the power air box to rotate.

[0014] Optionally, a one-way baffle is provided at the connection between the natural wind box, the power wind box, and the common ventilation box. A swing shaft is installed at the upper end of each of the two one-way baffles, and both swing shafts rotate through the inner wall of the common ventilation box.

[0015] Optionally, a filter plate is provided inside the exhaust box, and a torsion shaft is installed through the middle of the filter plate, which rotates through the inner wall of the exhaust box.

[0016] Optionally, gears are coaxially mounted on one end of the two swing shafts on the outside of the common ventilation box. The two gears are meshed with toothed plates on the side away from each other. The two toothed plates are connected to the outer side of the common ventilation box and slide vertically relative to the common ventilation box. A pull strap is provided between the two toothed plates on one side of the common ventilation box. The end of the pull strap away from the outer casing is connected to the outside of the power air box. When the pull belt moves, it drives the torsion shaft to rotate through the linkage swing component.

[0017] Optionally, the linkage swing component includes: A linkage frame is slidably connected to the outside of the outer casing, and one end of the linkage frame is fixed to a pull strap. The synchronous torsion plate has its lower end fixed to the torsion shaft and its upper end in the form of a rod. The linkage frame has a vertically arranged groove structure at one end near the exhaust box, and the rod structure of the synchronous torsion plate slides inside the vertically arranged groove structure of the linkage frame.

[0018] Optionally, the pull belt has three axles that roll symmetrically on its upper and lower sides, with two axles on the same side of the pull belt alternating with toothed plates on both sides of the same pull belt.

[0019] Optionally, the filter plate has arc blocks on both its upper and lower ends. The arc blocks are fixed to the inner wall of the exhaust box. The side of the arc block that contacts the filter plate is arc-shaped, and the arc surface of the arc block is coaxial with the torsion shaft.

[0020] In summary, the present invention has the following beneficial technical effects: This invention, by setting up a coolant circulation pipe assembly and an auxiliary air duct assembly in a coordinated manner, utilizes the flowing coolant to directly absorb heat from the battery unit, and uses the auxiliary air duct assembly to perform multi-stage air cooling of the coolant after heat absorption. This effectively solves the problem of reduced heat dissipation efficiency at the rear end caused by the excessively long coolant flow path, and ensures the uniformity of the overall temperature of the battery unit.

[0021] This invention achieves dual-mode switching by setting up a natural wind box and a powered wind box in conjunction with a temperature detection controller. Under low load, natural wind is used to save energy, while under high load, the powered fan is activated for forced cooling. This meets the cooling needs of different operating conditions while minimizing the energy consumption of the auxiliary system.

[0022] This invention dynamically links the air intake volume with the angle of the filter plate by setting up a mechanical linkage mechanism consisting of a toothed plate, a pull belt, and a linkage swing assembly. When the air volume is large, the filter plate is placed flat to ensure smooth exhaust. When the air volume is small or the machine is stopped, the filter plate is tilted to cooperate with the arc block for dust prevention. The balance between dust prevention and heat dissipation is achieved without additional electrical control. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure in an embodiment of the present invention; Figure 2 This is a front view schematic diagram of some structures in an embodiment of the present invention; Figure 3 This is a schematic diagram of the distribution of the pull belt and toothed plate in an embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of the linkage swing component and the distribution of the pull belt in an embodiment of the present invention; Figure 5 This is a schematic diagram of the connection between the filter plate and the torsion shaft in an embodiment of the present invention; Figure 6 This is a schematic diagram of the internal structure of the outer casing in an embodiment of the present invention; Figure 7 This is a schematic diagram of the dust removal pipe assembly in an embodiment of the present invention; Figure 8 This is a schematic diagram of the air inlet duct assembly in an embodiment of the present invention; Figure 9 This is a schematic diagram of the distribution of the heat sink and the bonding tube sheet in an embodiment of the present invention.

[0024] Reference numerals: 1. Outer casing; 2. Coolant circulator; 3. Coolant circulation pipe assembly; 31. Side tube plate; 32. Fitting tube plate; 4. Auxiliary air duct assembly; 41. Lower air box; 42. Exhaust air box; 43. Air inlet duct assembly; 44. Heat sink; 45. Filter plate; 46. Torsion shaft; 47. Arc block; 5. Air inlet assembly; 51. Common ventilation box; 52. Dust removal pipe assembly; 53. Natural ventilation box; 54. Powered ventilation box; 55. Temperature detection controller; 56. One-way baffle plate; 57. Swing shaft; 58. Gear; 59. Linked swing assembly; 591. Linkage frame; 592. Synchronous torsion plate; 510. Pull belt; 511. Toothed plate; 512. Wheel axle; 6. Battery unit. Detailed Implementation

[0025] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0026] It should be noted that all directional indications in the embodiments of this application are only used to explain the relative positional relationship and movement of each component in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0027] In this application, unless otherwise expressly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean 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.

[0028] Furthermore, the use of terms such as "first" and "second" in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. If the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed in this application.

[0029] The following is in conjunction with the appendix Figures 1-9 The present invention will be described in further detail below.

[0030] This invention discloses a battery cooling device for new energy traction engines. For example... Figures 1-9 As shown, it includes an outer casing 1, a coolant circulator 2, a coolant circulation pipe assembly 3, an auxiliary air duct assembly 4, an air intake assembly 5, and a battery unit 6.

[0031] The coolant circulator 2 is installed on the outside of the outer casing 1, and the coolant circulation pipe assembly 3 is located inside the outer casing 1. Both ends of the coolant circulation pipe assembly 3 penetrate the inside of the outer casing 1, and both ends of the coolant circulation pipe assembly 3 are connected to the liquid extraction end and the liquid return end of the coolant circulator 2, respectively.

[0032] During operation, the coolant circulator 2 can fill the coolant circulation pipe assembly 3 with coolant at low temperature, and then pump the coolant that has absorbed heat and heated up in the outer casing 1 back into the coolant circulator 2 for cooling treatment, thus cooling the outer casing 1.

[0033] The auxiliary air duct assembly 4 is located inside the outer casing 1, with both ends of the auxiliary air duct assembly 4 penetrating the inner wall of the outer casing 1. The coolant circulation pipe assembly 3 is located inside the outer casing 1, with one end sleeved and installed at the end of the coolant circulation pipe assembly 3 located inside the outer casing 1.

[0034] During operation, external airflow passes through the auxiliary air duct assembly 4 and comes into contact with the part of the coolant circulation pipe assembly 3 located inside the auxiliary air duct assembly 4. This process further cools the coolant that has absorbed heat inside the coolant circulation pipe assembly 3, thereby improving the heat absorption effect of the coolant on the subsequent parts inside the outer casing 1.

[0035] The air intake assembly 5 is installed outside the outer casing 1. The air intake assembly 5 is connected to the air intake end of the auxiliary air duct assembly 4. External airflow can enter the auxiliary air duct assembly 4 from the air intake end of the air intake assembly 5 and then be discharged from the other end of the auxiliary air duct assembly 4.

[0036] Multiple battery units 6 are provided. The battery units 6 are installed inside the outer casing 1. The coolant circulation pipe group 3 is attached to the battery units 6. The multiple battery units 6 are distributed in a matrix at equal distances.

[0037] Furthermore, in an alternative embodiment, the coolant circulation pipe assembly 3 includes a side pipe plate 31 and a bonding pipe plate 32.

[0038] There are two side tube plates 31, with the battery unit 6 located between them. The upper ends of the two side tube plates 31 penetrate the inner wall of the outer casing 1, and the two side tube plates 31 are respectively connected to the liquid extraction end and the liquid return end of the coolant circulator 2. Multiple bonding tube plates 32 are provided, and each battery unit 6 is bonded between two adjacent bonding tube plates 32. The bonding tube plate 32 is made of thermally conductive material.

[0039] During operation, the coolant flows through the bonding tube plate 32. The coolant in the part of the bonding tube plate 32 that is in contact with the battery cell 6 absorbs the heat generated by the battery cell 6 in a timely manner through the bonding tube plate 32, thereby reducing the temperature of the battery cell 6.

[0040] Specifically, the auxiliary air duct assembly 4 includes a lower air box 41, an air inlet duct assembly 43, and a heat dissipation plate 44.

[0041] The battery unit 6 is installed on the upper side of the lower air box 41, and the lower air box 41 is connected to the exhaust box 42, which penetrates the inner wall of the outer casing 1.

[0042] Furthermore, in an optional embodiment, a filter plate 45 is provided inside the exhaust box 42, and a torsion shaft 46 is installed through the middle of the filter plate 45. The torsion shaft 46 rotates through the inner wall of the exhaust box 42, and the filter plate 45 prevents external dust from entering the lower air box 41 from the exhaust box 42.

[0043] The air inlet duct assembly 43 is located inside the outer casing 1. The air inlet duct assembly 43 penetrates the inner wall of the outer casing 1. One end of the air inlet duct assembly 43 is located outside the outer casing 1 and is connected to the air inlet component 5. The air inlet duct assembly 43 is located on the upper side of the battery unit 6.

[0044] Specifically, a one-way valve structure is installed inside the air inlet duct assembly 43, so that the airflow of the air inlet duct assembly 43 enters the heat sink 44 in one direction.

[0045] Multiple heat sinks 44 are provided, and each bonding tube plate 32 passes through multiple heat sinks 44 in sequence. The two ends of the heat sinks 44 are connected to the air inlet duct group 43 and the lower air box 41, respectively.

[0046] External airflow flows within the heat sink 44. The airflow within the multiple heat sinks 44 performs multiple cooling processes on the coolant inside the bonding tube plate 32. This prevents the coolant temperature from rising as the number of battery cells 6 in contact with the bonding tube plate 32 increases, thus reducing the absorption effect on the battery cells 6 in the latter part. Furthermore, as the airflow passes through the bonding tube plate 32 with multiple heat sinks 44, the coolant inside the bonding tube plate 32 undergoes multi-stage cooling, ensuring that the heat generated by the battery cells 6 in the latter part is fully absorbed.

[0047] Specifically, the air intake assembly 5 includes a common ventilation box 51, a dust removal pipe assembly 52, a natural air box 53, a powered air box 54, and a temperature detection controller 55.

[0048] Multiple dust removal pipe assemblies 52 are provided, and both ends of the dust removal pipe assembly 52 are connected to the common ventilation box 51 and the air inlet pipe assembly 43, respectively.

[0049] Specifically, the dust removal tube assembly 52 consists of a pipe and a filter cartridge. The filter cartridge is installed inside the pipe. The end of the filter cartridge near the common ventilation box 51 is conical. When the airflow passes through the conical filter cartridge, it blocks the dust mixed in with the airflow. At the same time, because the filter cartridge is conical, the blocked dust tends to move towards the larger diameter end of the filter cartridge under the push of the airflow.

[0050] The natural ventilation box 53 is installed at the end of the common ventilation box 51 away from the dust removal pipe assembly 52. ​​The powered ventilation box 54 is equipped with a powered fan assembly and is installed on the upper side of the natural ventilation box 53. The powered ventilation box 54 is connected to the common ventilation box 51.

[0051] When the temperature generated by the battery cell 6 is low, a large airflow is not required. Only external natural wind enters the common ventilation box 51 through the natural wind box 53. The airflow generated when the traction machine moves and the airflow generated by the external natural wind enter the heat sink 44. The flowing airflow cools the coolant in the tube sheet 32.

[0052] One-way baffles 56 are provided at the connection points between the natural wind box 53, the power wind box 54, and the common ventilation box 51. A swing shaft 57 is installed at the upper end of each of the two one-way baffles 56, and both swing shafts 57 rotate through the inner wall of the common ventilation box 51.

[0053] Specifically, the lower end of the one-way baffle 56, near the outer casing 1, is the gravity end, which enables the one-way baffle 56 to block the natural air box 53 and the power air box 54 in one direction, so that the airflow will not enter the natural air box 53 and the power air box 54 from the common air box 51 in the opposite direction.

[0054] Two swing shafts 57 are coaxially mounted with gears 58 at one end of the outer side of the common ventilation box 51. The two gears 58 are meshed with toothed plates 511 on the side away from each other. The two toothed plates 511 are connected to the outer side of the common ventilation box 51. The toothed plates 511 slide vertically relative to the common ventilation box 51. A pull strap 510 is provided between the two toothed plates 511 on one side of the common ventilation box 51. The end of the pull strap 510 away from the outer casing 1 is connected to the outside of the power air box 54.

[0055] When the pull belt 510 moves, it drives the torsion shaft 46 to rotate through the linkage swing assembly 59. Three wheel axles 512 are symmetrically rolling contacts on the upper and lower sides of the pull belt 510. Two wheel axles 512 on the same side of the pull belt 510 are alternately distributed with toothed plates 511 on both sides of the same pull belt 510. When the two toothed plates 511 move toward the pull belt 510 and push the pull belt 510 to bend, the three wheel axles 512 on the upper and lower sides support the upper and lower sides of the pull belt 510.

[0056] When the airflow in the natural wind box 53 and the power wind box 54 enters the common ventilation box 51, the airflow pushes the two one-way baffles 56 to rotate. The one-way baffles 56 drive the gear 58 to rotate through the swing shaft 57. The toothed plate 511 meshes with the gear 58 and moves toward the pull belt 510, pushing the pull belt 510 to bend.

[0057] Temperature detection controller 55 is installed on the upper side of the outer casing 1. Temperature detection controller 55 can detect the internal temperature of the outer casing 1. After the temperature detection controller 55 detects that the internal temperature of the outer casing 1 has reached the critical value, it controls the power fan group of the power air box 54 to rotate.

[0058] The temperature detection controller 55 consists of a temperature detection unit and a control unit. After the temperature detection unit detects that the temperature inside the outer casing 1 has reached a critical value, it controls the power fan group in the power air box 54 to rotate, thereby increasing the total airflow through the common ventilation box 51.

[0059] When the temperature inside the outer casing 1 is low, the power fan unit does not rotate. After the temperature inside the outer casing 1 reaches a critical value, the power fan unit is then started to increase the airflow through the heat sink 44, thereby increasing the cooling effect on the coolant inside the bonding tube plate 32.

[0060] The linkage swing assembly 59 includes a linkage frame 591 and a synchronous torsion plate 592.

[0061] The linkage frame 591 is slidably connected to the outside of the outer casing 1, and one end of the linkage frame 591 is fixed to the pull strap 510; The lower end of the synchronous torsion plate 592 is fixed to the torsion shaft 46, and the upper end of the synchronous torsion plate 592 is a rod-shaped structure. The linkage frame 591 has a vertically arranged groove structure at one end near the exhaust box 42. The rod-shaped structure of the synchronous torsion plate 592 slides inside the vertically arranged groove structure of the linkage frame 591.

[0062] Both ends of the filter plate 45 are provided with arc blocks 47. The arc blocks 47 are fixed to the inner wall of the exhaust box 42. The side of the arc block 47 that contacts the filter plate 45 is arc-shaped. The arc surface of the arc block 47 is coaxial with the torsion shaft 46.

[0063] During heat dissipation, when the power air box 54 and the natural air box 53 fill the common ventilation box 51 with airflow, they correspondingly push the two one-way baffle plates 56 to rotate, causing the corresponding toothed plates 511 to move toward the pull belt 510, pushing the pull belt 510 to bend. When the pull belt 510 bends, it pulls the linkage frame 591, causing the rod-shaped synchronous torsion plate 592 to slide in the groove structure of the linkage frame 591, and at the same time causing the synchronous torsion plate 592 to rotate, causing the filter plate 45 to rotate. When the overall airflow of the power air box 54 and the natural air box 53 is large enough, it causes the filter plate 45 to tend to be horizontal, so that the airflow inside can be smoothly discharged.

[0064] Under the overall effect, when the air volume is small, the filter plate 45 rotates at a small angle, and the arc blocks 47 on both sides contact the filter plate 45, so that the airflow passes through the filter plate 45. This prevents the exhaust air volume from being insufficient to block the dust from the outside from entering the interior through the exhaust box 42 when the air volume is small. At the same time, after the power box 54 and the natural box 53 are filled with enough air volume, the filter plate 45 rotates to a near-horizontal position, and a larger air volume is discharged from the exhaust box 42. The larger air volume can prevent the dust from the outside from entering.

[0065] The working principle is as follows: When the battery unit 6 generates heat, the coolant circulator 2 starts and pumps the low-temperature coolant into the coolant circulation pipe group 3. The coolant first enters the side tube plate 31 and then flows to each bonding tube plate 32. Since the bonding tube plate 32 is made of thermally conductive material and is tightly bonded to the battery unit 6, it can quickly absorb the heat generated by the battery unit 6, causing the coolant temperature to rise. The heated coolant flows back to the coolant circulator 2 through the other side tube plate 31, and after cooling, it re-enters the circulation, forming a continuous liquid cooling heat dissipation circuit.

[0066] While the liquid cooling system is operating, the auxiliary air duct assembly 4 plays a key role in the entire heat dissipation process. External airflow enters the auxiliary air duct assembly 4 through the air intake assembly 5 and comes into full contact with the coolant circulation pipe assembly 3 to further cool the coolant inside the pipe. The airflow passing through multiple heat dissipation plates 44 can perform multi-stage cooling of the coolant inside the tube sheet 32, avoiding a decrease in heat dissipation efficiency due to the increase in coolant temperature, and ensuring that all battery units 6 can receive uniform and effective heat dissipation.

[0067] The air intake assembly 5 automatically adjusts its working mode according to the temperature inside the outer casing 1. The temperature detection controller 55 monitors the internal temperature in real time. When the temperature is low, only the natural air box 53 introduces external natural air. When the temperature inside the outer casing 1 reaches the critical value, the temperature detection controller 55 automatically starts the power fan group in the power air box 54 to introduce forced airflow. At this time, natural air and forced air enter the common ventilation box 51 together. The airflow pushes the one-way baffle 56 to open, and drives the gear 58 to rotate through the swing shaft 57. This causes the toothed plate 511 to pull the pull belt 510. The movement of the pull belt 510 drives the synchronous torsion plate 592 to rotate through the linkage frame 591, so that the torsion shaft 46 drives the filter plate 45 to rotate to a horizontal state, ensuring smooth exhaust.

[0068] Compared with traditional heat dissipation solutions, this equipment has significant advantages in efficient heat dissipation. It adopts a composite heat dissipation mode that combines liquid cooling and air cooling. The coolant circulation system directly absorbs the heat generated by the battery unit (6), and the auxiliary air duct system performs secondary cooling of the coolant, which can meet the heat dissipation requirements of high-density battery packs.

[0069] The above are all preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A battery cooling device for a new energy traction machine, comprising a housing (1) and a coolant circulator (2), wherein the coolant circulator (2) is installed on the outside of the housing (1), characterized in that, Also includes: Coolant circulation pipe assembly (3), the coolant circulation pipe assembly (3) is located inside the outer casing (1), the two ends of the coolant circulation pipe assembly (3) penetrate through the inside of the outer casing (1), and the two ends of the coolant circulation pipe assembly (3) are respectively connected to the liquid extraction end and the liquid return end of the coolant circulator (2); Auxiliary air duct assembly (4), the auxiliary air duct assembly (4) is located inside the outer casing (1), the two ends of the auxiliary air duct assembly (4) penetrate through the inner wall of the outer casing (1), and the coolant circulation pipe assembly (3) is located inside the outer casing (1) with one end sleeved and installed at the end of the coolant circulation pipe assembly (3) located inside the outer casing (1); Air intake assembly (5), which is installed outside the outer casing (1) and connected to the air intake end of the auxiliary air duct assembly (4); Battery unit (6), multiple battery units (6) are provided. The battery units (6) are installed inside the outer casing (1). The coolant circulation pipe group (3) is attached to the battery unit (6).

2. The battery cooling device for a new energy traction machine according to claim 1, characterized in that: The coolant circulation pipe assembly (3) includes: Side tube plate (31), two side tube plates (31) are provided, the battery unit (6) is located between the side tube plates (31), the upper ends of the two side tube plates (31) penetrate through the inner wall of the outer casing (1), and the two side tube plates (31) are respectively connected to the liquid extraction end and the liquid return end of the coolant circulator (2); The bonding tube sheet (32) is provided in multiple ways. Each battery unit (6) is bonded between two adjacent bonding tube sheets (32). The bonding tube sheet (32) is made of thermally conductive material.

3. A battery cooling device for a new energy traction machine according to claim 2, characterized in that: The auxiliary duct assembly (4) includes; The lower air box (41) is connected to the upper side of the battery unit (6), and the lower air box (41) is connected to the exhaust box (42), which penetrates the inner wall of the outer casing (1). Air inlet pipe assembly (43), the air inlet pipe assembly (43) is located inside the outer casing (1), the air inlet pipe assembly (43) penetrates the inner wall of the outer casing (1), the air inlet pipe assembly (43) is located outside the outer casing (1) and is connected to the air inlet assembly (5), the air inlet pipe assembly (43) is located on the upper side of the battery unit (6); The heat sink (44) is provided in multiple ways. Each bonding tube plate (32) passes through multiple heat sinks (44) in sequence. The two ends of the heat sink (44) are connected to the air inlet pipe group (43) and the lower air box (41) respectively.

4. A battery cooling device for a new energy traction machine according to claim 3, characterized in that: The air intake assembly (5) includes: Common ventilation box (51); Dust removal pipe assembly (52), multiple dust removal pipe assemblies (52) are provided, and the two ends of the dust removal pipe assembly (52) are respectively connected to the common ventilation box (51) and the air inlet pipe assembly (43); Natural air box (53), said natural air box (53) is installed at the end of common air box (51) away from dust collection pipe assembly (52); Powered air box (54), a power fan assembly is installed inside the powered air box (54), the powered air box (54) is installed on the upper side of the natural air box (53), and the powered air box (54) is connected to the common air box (51); Temperature detection controller (55) is installed on the upper side of the outer casing (1). The temperature detection controller (55) can detect the internal temperature of the outer casing (1). After the temperature detection controller (55) detects that the internal temperature of the outer casing (1) has reached the critical value, it controls the power fan group of the power air box (54) to rotate.

5. A battery cooling device for a new energy traction machine according to claim 4, characterized in that: One-way baffles (56) are provided at the connection between the natural wind box (53), the power wind box (54), and the common ventilation box (51). A swing shaft (57) is installed at the upper end of each of the two one-way baffles (56), and the two swing shafts (57) rotate through the inner wall of the common ventilation box (51).

6. A battery cooling device for a new energy traction machine according to claim 5, characterized in that: The exhaust box (42) is equipped with a filter plate (45), and a torsion shaft (46) is installed through the middle of the filter plate (45). The torsion shaft (46) rotates through the inner wall of the exhaust box (42).

7. A battery cooling device for a new energy traction machine according to claim 6, characterized in that: Two swing shafts (57) are coaxially mounted with gears (58) at one end of the common ventilation box (51). The two gears (58) are meshed with toothed plates (511) on the side away from each other. The two toothed plates (511) are connected to the outer side of the common ventilation box (51). The toothed plates (511) slide vertically relative to the common ventilation box (51). A pull strap (510) is provided between the two toothed plates (511) on one side of the common ventilation box (51). The end of the pull strap (510) away from the outer casing (1) is connected to the outside of the power air box (54). When the pull belt (510) moves, it drives the torsion shaft (46) to rotate through the linkage swing assembly (59).

8. A battery cooling device for a new energy traction machine according to claim 7, characterized in that: The linkage swing assembly (59) includes: Linkage frame (591), the linkage frame (591) is slidably connected to the outside of the outer casing (1), and one end of the linkage frame (591) is fixed to the pull strap (510); Synchronous torsion plate (592), the lower end of which is fixed to the torsion shaft (46), the upper end of which is rod-shaped, and the linkage frame (591) has a vertically arranged groove structure at one end near the exhaust box (42). The rod-shaped structure of the synchronous torsion plate (592) slides inside the vertically arranged groove structure of the linkage frame (591).

9. A battery cooling device for a new energy traction machine according to claim 8, characterized in that: The pull belt (510) has three axles (512) symmetrically rolling contacts on its upper and lower sides. The two axles (512) on the same side of the pull belt (510) are alternately distributed with the toothed plates (511) on both sides of the same pull belt (510).

10. A battery cooling device for a new energy traction machine according to claim 6 or 8, characterized in that: The filter plate (45) has arc blocks (47) on both the upper and lower ends. The arc blocks (47) are fixed to the inner wall of the exhaust box (42). The side of the arc block (47) that contacts the filter plate (45) is arc-shaped. The arc surface of the arc block (47) is coaxial with the torsion shaft (46).

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