Integrated heat dissipation system for new energy mine car and control method

Abstract

The invention discloses an integrated cooling system for a new energy mine car and a control method. The integrated cooling system comprises a first radiator, a second radiator, a low-pressure water pump, a high-pressure water pump, a motor controller, a driving motor, a wet disc brake and a whole car controller, wherein the first radiator and the second radiator are respectively provided with two inlets and two outlets. A first outlet of the first radiator is sequentially connected with a first inlet of the second radiator, a second outlet of the second radiator, the high-pressure water pump, the wet disc brake and a first inlet of the first radiator in series through pipelines to form a brake cooling loop. A second outlet of the first radiator is sequentially connected with a low-pressure water pump, a motor controller, a driving motor and a second inlet of the first radiator in series through pipelines to form a first motor cooling loop. By sharing the radiator main body structure, the physical space requirement is reduced, the space occupation is obviously reduced, and the space utilization rate is greatly improved. Through the design of the double cooling loops, the cooling capacity of the system can still be maintained through the second radiator when the first radiator loses efficacy.

Description

Technical Field

[0001] The present invention relates to the technical field of heat dissipation for new energy mining trucks, and particularly to an integrated heat dissipation system and control method for new energy mining trucks. Background Art

[0002] In recent years, with the continuous expansion of the demand for green mining and the construction of green mines, the market share of new energy mining trucks has been increasing year by year. At the same time, the requirements for the braking performance of the whole vehicle are constantly improving, and more and more vehicle models are beginning to adopt wet disc braking technology. For new energy mining trucks with wet disc brakes, the braking force mainly comes from the motor electric retarder and the wet disc brake. Under continuous working conditions, the wet disc brake is only used for braking when the motor electric retarder is not sufficient to meet the braking demand. However, the motor, the motor controller, and the brake will generate a large amount of heat during operation. To ensure their normal operation, a corresponding heat dissipation system must be designed to dissipate the excess heat in time.

[0003] At present, the water-cooled wet disc brake and the motor electric control heat dissipation of new energy mining trucks usually adopt two independent heat dissipation systems. This design has many problems: First, the radiators are independent of each other, which requires a large layout space for the whole vehicle, resulting in a low utilization efficiency of the radiators; Second, the number of components is large, and the cost of the heat dissipation system is relatively high; In addition, the system fault tolerance rate is low. If the radiator function of any one system fails, it will immediately have a serious impact on that heat dissipation system, thus affecting the normal operation of the whole vehicle. Therefore, there is an urgent need for a system that can integrate wet disc brake and motor electric control heat dissipation to improve the heat dissipation efficiency, reduce the cost, and enhance the fault tolerance performance of the system. Summary of the Invention

[0004] In view of this, the present invention provides an integrated heat dissipation system for new energy mining trucks, which has the advantages of improving the heat dissipation efficiency, reducing the space occupation, reducing the cost, and enhancing the fault tolerance performance of the system.

[0005] To achieve the above object, the present invention provides the following technical solutions: An integrated heat dissipation system for new energy mining trucks, comprising: a first radiator and a second radiator each having two inlets and two outlets, a low-pressure water pump, a high-pressure water pump, a motor controller, a drive motor, a wet disc brake, and a vehicle controller.

[0006] Among them, the first radiator, the second radiator, the low-pressure water pump, the high-pressure water pump, the motor controller, the drive motor, and the wet disc brake are all connected to the vehicle controller by signals; the first outlet of the first radiator is connected in series with the first inlet of the second radiator, the second outlet of the second radiator, the high-pressure water pump, the wet disc brake, and the first inlet of the first radiator through pipelines to form a brake cooling circuit; the second outlet of the first radiator is connected in series with the low-pressure water pump, the motor controller, the drive motor, and the second inlet of the first radiator through pipelines to form a first motor cooling circuit.

[0007] Preferably, the integrated heat dissipation system for a new energy mining vehicle further includes a direct-through electronic valve one and a direct-through electronic valve two, both of which are connected to the vehicle controller by signals; the direct-through electronic valve one is installed on the pipeline between the second outlet of the first radiator and the low-pressure water pump; the direct-through electronic valve two is installed on the pipeline from the drive motor to the second inlet of the first radiator.

[0008] Preferably, the first outlet of the second radiator is connected in series with the low-pressure water pump, the motor controller, the drive motor, and the second inlet of the second radiator through pipelines to form a second motor cooling circuit.

[0009] Preferably, the integrated heat dissipation system for a new energy mining vehicle further includes a direct-through electronic valve three and a direct-through electronic valve four, both of which are connected to the vehicle controller by signals; the direct-through electronic valve three is installed on the pipeline between the first outlet of the second radiator and the low-pressure water pump; the direct-through electronic valve four is installed on the pipeline from the drive motor to the second inlet of the second radiator.

[0010] Preferably, the integrated heat dissipation system for a new energy mining vehicle further includes a four-way joint and a three-way joint; the direct-through electronic valve one is connected to the low-pressure water pump through the four-way joint, the direct-through electronic valve three is connected to the low-pressure water pump through the four-way joint, and the water outlet of the motor expansion tank is connected to the four-way joint; the second outlet of the second radiator is connected to the high-pressure water pump through the three-way joint, and the water outlet of the brake expansion tank is connected to the three-way joint.

[0011] The present invention also provides a control method for an integrated cooling system of a new energy mining truck, which is applied to the integrated cooling system of the new energy mining truck in the above embodiment. The method includes: the vehicle controller checks whether the vehicle is in the on state and whether the first radiator fails; if the vehicle is not in the on state, the vehicle controller controls the low-pressure water pump, the high-pressure water pump, the first radiator fan, and the second radiator fan to stop working; if the vehicle is in the on state and the first radiator is normal, the vehicle controller controls the first direct-through solenoid valve and the second direct-through solenoid valve to open, the third direct-through solenoid valve and the fourth direct-through solenoid valve to close, and controls the low-pressure water pump and the high-pressure water pump to operate at a low gear; if the vehicle is in the on state and the first radiator fails, the vehicle controller controls the first direct-through solenoid valve and the second direct-through solenoid valve to close, the third direct-through solenoid valve and the fourth direct-through solenoid valve to open, and controls the low-pressure water pump and the high-pressure water pump to operate at a low gear; during the operation of the vehicle, the vehicle controller adjusts the working gears of the low-pressure water pump, the high-pressure water pump, the first radiator fan, and the second radiator fan according to the temperature of the wet disc brake and the temperature of the motor.

[0012] Preferably, when the temperature of the wet disc brake is greater than or equal to 65°C and less than 75°C, the vehicle controller controls the high-pressure water pump and the second radiator fan to operate at a low gear; when the temperature of the wet disc brake is greater than or equal to 75°C and less than 90°C, the vehicle controller controls the high-pressure water pump to operate at a low gear and the second radiator fan to operate at a high gear.

[0013] Preferably, when the temperature of the wet disc brake is greater than or equal to 90°C, the vehicle controller controls the high-pressure water pump, the first radiator fan, and the second radiator fan to operate at a high gear; when the temperature of the wet disc brake is less than 65°C, the vehicle controller controls the second radiator fan to stop working.

[0014] Preferably, when the temperature of the motor is greater than or equal to 65°C and less than 75°C, the vehicle controller controls the low-pressure water pump and the first radiator fan to operate at a low gear; when the temperature of the motor is greater than or equal to 75°C and less than 90°C, the vehicle controller controls the low-pressure water pump to operate at a low gear and the first radiator fan to operate at a high gear.

[0015] Preferably, when the temperature of the motor is greater than or equal to 90°C, the vehicle controller controls the low-pressure water pump and the first radiator fan to operate at a high gear; when the temperature of the motor is less than 65°C and the temperature of the brake is less than 90°C, the vehicle controller controls the first radiator fan to stop working.

[0016] The beneficial effects of the present invention are as follows: Compared with the prior art, an integrated cooling system for a new energy mining truck disclosed in the present application reduces the physical space requirements by sharing the radiator main structure, significantly reducing the space occupation and greatly improving the space utilization rate. When a single radiator in the traditional cooling system fails, the corresponding heat dissipation function will be directly lost, while the design of the dual cooling circuit in this solution can still maintain the system cooling capacity through the second radiator when the first radiator fails. There is an issue of cumulative energy consumption in the traditional independent water pump system, while this solution realizes energy efficiency optimization through the differential configuration of high and low pressure water pumps.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present invention. Brief Description of the Drawings

[0018] Figure 1 is a schematic diagram of the water circuit connection of the integrated cooling system of the present invention; Figure 2 is a flowchart of the working process of the control method of the integrated cooling system of the present invention; Figure 3 is a flowchart of the working process of the fault mode control method of the integrated cooling system of the present invention. Detailed Description of the Embodiments

[0019] The embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are intended to explain the present invention, and should not be construed as a limitation of the present invention.

[0020] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality" means two or more unless otherwise specifically defined.

[0021] Next, reference is made to Figures 1 to 3 describe the integrated cooling system for a new energy mining truck in the embodiments of the present invention.

[0022] An integrated cooling system for a new energy mining truck is disclosed in the embodiments of the present application, including: a first radiator and a second radiator each having two inlets and two outlets, a low-pressure water pump, a high-pressure water pump, a motor controller, a drive motor, a wet disc brake, and a vehicle control unit (abbreviation: VCU).

[0023] Among them, the first radiator, the second radiator, the low-pressure water pump, the high-pressure water pump, the motor controller, the drive motor, and the wet disc brake are all connected to the vehicle controller by signals; the first outlet of the first radiator is connected in series with the first inlet of the second radiator, the second outlet of the second radiator, the high-pressure water pump, the wet disc brake, and the first inlet of the first radiator through pipelines to form a brake cooling circuit; the second outlet of the first radiator is connected in series with the low-pressure water pump, the motor controller, the drive motor, and the second inlet of the first radiator through pipelines to form a first motor cooling circuit.

[0024] In the prior art, the field of new energy mining vehicles has long faced the technical problem of complex layout of the cooling system. The traditional solution uses two independent systems for wet disc brake cooling and motor electric control cooling, resulting in repeated occupation of the vehicle installation space. The parallel arrangement of independent radiators not only increases the number of components but also results in low utilization rate of the heat dissipation surface. When a certain radiator fails, the lack of a backup heat dissipation path will directly affect the vehicle operation safety, and the problem of insufficient system redundancy design is particularly prominent.

[0025] The integrated cooling system for new energy mining vehicles proposed in this application can effectively solve the above problems. Specifically: This application sets up the first radiator and the second radiator, both of which are configured with two water inlets and two water outlets. The low-pressure water pump and the high-pressure water pump are respectively connected to the motor controller-drive motor circuit and the wet disc brake circuit. The vehicle controller coordinates the working states of all cooling components through signal connection. The first radiator and the second radiator are connected in series through pipelines to form a brake cooling circuit, and at the same time, the first radiator independently forms a first motor cooling circuit.

[0026] In this embodiment, the first radiator refers to a heat exchange device with dual-channel heat dissipation ability, and its two water outlets respectively correspond to the fluid outputs of different cooling circuits. The second radiator refers to a heat dissipation unit forming a series structure with the first radiator, and realizes heat exchange coordination with the first radiator through a dual-water inlet design. The low-pressure water pump refers to a power device for a low-pressure circulation system, which is responsible for the medium transportation of the motor cooling circuit. The high-pressure water pump refers to a circulation power device providing high lift to ensure the efficient circulation of the brake cooling circuit. The vehicle controller can coordinate the operation of the cooling system and adjust the working states of each component by receiving temperature signals in real time.

[0027] Specifically, the brake cooling circuit forms a multi-stage heat dissipation path by connecting two radiators in series. After the cooling medium flows out of the first radiator, it flows through the two heat exchange channels of the second radiator in sequence, and the heat dissipation efficiency is improved through a dual heat dissipation process. The first motor cooling circuit adopts an independent circulation design, and the medium circulation is maintained by the low-pressure water pump to form a heat management path isolated from the brake circuit. The vehicle controller dynamically adjusts the working parameters of the water pump by monitoring the temperature data in real time to achieve the heat dissipation demand matching under different working conditions.

[0028] Compared with the prior art, the independently provided radiator in the traditional solution occupies double installation space, while in this solution, the physical space requirement is reduced by sharing the radiator main structure, significantly reducing the space occupation and greatly improving the space utilization rate. There is an issue of energy consumption superposition in the traditional independent water pump system, while in this solution, the energy efficiency is optimized through the differential configuration of high and low pressure water pumps.

[0029] In some embodiments, the integrated heat dissipation system for new energy mining vehicles further includes a direct-through electronic valve one and a direct-through electronic valve two, both of which are signal-connected to the vehicle controller; the direct-through electronic valve one is installed on the pipeline between the second outlet of the first radiator and the low-pressure water pump; the direct-through electronic valve two is installed on the pipeline from the drive motor to the second inlet of the first radiator.

[0030] In some embodiments, the direct-through electronic valve one refers to an electromagnetic control valve installed on the pipeline between the first radiator and the low-pressure water pump, and its opening or closing state is independently controlled by the electrical signal output by the vehicle controller, and is used to adjust the flow path of the coolant in the motor cooling circuit. The direct-through electronic valve two refers to an electromagnetic control valve installed on the pipeline between the drive motor and the return water port of the first radiator, and its structure and control method are the same as those of the direct-through electronic valve one, and is used to control whether the coolant flows back to the first radiator. When the first radiator is in a normal working state, the direct-through electronic valve one remains open to allow the coolant to flow from the first radiator to the low-pressure water pump, and the direct-through electronic valve two remains open to enable the coolant flowing out of the drive motor to return to the first radiator to complete the cycle.

[0031] In some embodiments, the first outlet of the second radiator is serially connected to the low-pressure water pump, the motor controller, the drive motor, and the second inlet of the second radiator through pipelines to form a second motor cooling circuit.

[0032] In this embodiment, the first outlet of the second radiator is used to convey the coolant that has completed preliminary heat dissipation to the low-pressure water pump. The second inlet of the second radiator is used to receive the high-temperature coolant flowing out of the drive motor. The second motor cooling circuit forms a standby heat dissipation path in parallel with the first radiator through the series connection of the second radiator and the low-pressure water pump. When the first radiator fails, the first outlet of the second radiator conveys the coolant to the low-pressure water pump, and after being pressurized, it flows through the motor controller and the drive motor in sequence, absorbing the heat generated by both. Subsequently, the high-temperature coolant returns to the interior of the radiator through the second inlet of the second radiator and undergoes secondary heat exchange under the action of the fan to achieve continuous heat dissipation. This circuit ensures that the motor and electronic control system is always in an effective cooling state by automatically enabling the standby path when the first radiator fails through the parallel structure of the two radiators.

[0033] Compared with the existing technology, the existing independent cooling system only has a single cooling circuit. Once the radiator fails, the cooling of the motor electronic control system will be interrupted. However, this solution constructs two independent coolant circulation paths through the redundant configuration of the second radiator and the low-pressure water pump, and can still maintain the cooling function when any path fails. It effectively solves the problem that the motor electronic control system cannot continue to dissipate heat when the first radiator fails. The backup circuit is used to ensure that key heating components can still be effectively cooled under fault conditions, avoiding system shutdown caused by overheating, and significantly improving the fault tolerance and operational reliability of the cooling system.

[0034] Furthermore, the integrated cooling system for the new energy mining vehicle is characterized in that it also includes a direct electronic valve three and a direct electronic valve four, both of which are connected to the vehicle controller signal; the direct electronic valve three is installed on the pipeline from the first outlet of the second radiator to the low-pressure water pump; the direct electronic valve four is installed on the pipeline from the drive motor to the second inlet of the second radiator.

[0035] In this embodiment, the direct electronic valve 3 refers to a valve used to control the flow of coolant from the second radiator into the main motor cooling circuit, and its installation position determines the connection state between the outlet of the second radiator and the low-pressure water pump. The direct electronic valve 4 refers to a valve used to control whether the return water from the drive motor is introduced into the second radiator, and its installation position determines the fluid path between the outlet of the drive motor and the inlet of the second radiator. The two are controlled by electrical signal linkage to form a key node of the backup cooling circuit, and a cooling circulation channel can be independently established when the radiator fails.

[0036] Furthermore, when the first radiator fails, the direct electronic valve three is controlled to open to guide the coolant of the second radiator into the low-pressure water pump, and the direct electronic valve four is opened to allow the heat medium generated by the drive motor to enter the second radiator. At this time, the cooling medium flows through the second radiator, the direct electronic valve three, the low-pressure water pump, the motor controller, the drive motor, the direct electronic valve four and returns to the second radiator in sequence, forming a complete backup heat dissipation cycle. The vehicle controller dynamically adjusts the opening and closing combination of the two sets of valves by monitoring the status of the first radiator in real time to ensure that the cooling path is automatically switched when the failure of the first radiator is detected. This dual-valve collaborative control method realizes the redundant configuration of the cooling circuit, so that the continuous thermal management of the motor electronic control system can be maintained when the first radiator fails.

[0037] Compared with the prior art, when the traditional new energy mining truck adopts an independent cooling system, the motor cooling and the brake cooling respectively rely on a single radiator, and the failure of any radiator will directly cause the corresponding system to stop. However, in this solution, a switchable standby cooling circuit is constructed through two groups of direct-through valves, enabling the second radiator to have the dual functions of supporting both brake cooling and motor cooling. Compared with the traditional redundancy solution of adding a third set of independent radiators, based on the original two radiators, this design realizes the improvement of the system fault tolerance ability by optimizing the pipeline layout and valve control logic.

[0038] In some embodiments, the integrated cooling system for a new energy mining truck further includes a four-way joint and a three-way joint; the first direct-through electronic valve is connected to the low-pressure water pump through the four-way joint, the third direct-through electronic valve is connected to the low-pressure water pump through the four-way joint, and the water outlet of the motor expansion tank is connected to the four-way joint; the second outlet of the second radiator is connected to the high-pressure water pump through the three-way joint, and the water outlet of the brake expansion tank is connected to the three-way joint.

[0039] In this embodiment, the four-way joint refers to a fluid transmission component with four connection ports, which is used to connect two direct-through electronic valves, the low-pressure water pump and the water outlet of the motor expansion tank at the same time to form a multi-way intersection node. This component realizes the function of switching the coolant flow direction by establishing branch pipelines, and at the same time provides an access point for replenishing the motor expansion tank. The three-way joint refers to a fluid transmission component with three connection ports, which is used to connect the second outlet of the radiator, the inlet of the high-pressure water pump and the water outlet of the brake expansion tank in series to form a pressure balance node. This component integrates the high-pressure circuit and the expansion tank replenishment path to ensure the pressure stability of the brake cooling system under high-temperature conditions.

[0040] Furthermore, the four-way joint integrates the originally independent low-pressure water pump inlet, the outlet of the first direct-through electronic valve, the outlet of the third direct-through electronic valve and the replenishment pipeline of the motor expansion tank into a single connection node. When the first radiator fails, the first direct-through electronic valve closes and the third direct-through electronic valve opens, and the four-way joint guides the coolant to flow from the second outlet of the radiator through the third direct-through electronic valve to the low-pressure water pump. At this time, the motor expansion tank replenishes the coolant to the low-pressure circuit through the four-way joint to maintain the system pressure. The three-way joint connects the second outlet of the radiator, the inlet of the high-pressure water pump and the brake expansion tank in the brake cooling circuit. When the brake temperature rises and causes the coolant to expand, the three-way joint allows the excess coolant to flow back to the expansion tank to avoid excessive pipeline pressure. The combined application of these two types of joints enables the cooling circuit to have the ability of dynamic switching, ensuring that the system can still operate by adjusting the valve state when the first radiator fails.

[0041] The present invention also proposes a control method for an integrated cooling system for a new energy mining truck, which is applied to the integrated cooling system for a new energy mining truck in the above embodiments, and includes: The vehicle controller checks whether the vehicle is in the on state and whether the first radiator has failed; if the vehicle is not in the on state, the vehicle controller controls the low-pressure water pump, high-pressure water pump, first radiator fan, and second radiator fan to stop working; if the vehicle is in the on state and the first radiator is normal, the vehicle controller controls the direct-through solenoid valve 1 and direct-through solenoid valve 2 to open, the direct-through solenoid valve 3 and direct-through solenoid valve 4 to close, and controls the low-pressure water pump and high-pressure water pump to operate at a low gear; if the vehicle is in the on state and the first radiator has failed, the vehicle controller controls the direct-through solenoid valve 1 and direct-through solenoid valve 2 to close, the direct-through solenoid valve 3 and direct-through solenoid valve 4 to open, and controls the low-pressure water pump and high-pressure water pump to operate at a low gear; during the vehicle operation, the vehicle controller adjusts the operating gears of the low-pressure water pump, high-pressure water pump, first radiator fan, and second radiator fan according to the wet disc brake temperature and motor temperature.

[0042] In this embodiment, the adjustment of the operating gear means that the vehicle controller adjusts the operating speeds of the water pump and fan in stages according to the real-time temperature data of the motor or wet disc brake, so as to realize the dynamic matching of the heat dissipation capacity and the heat generation of the equipment. When the vehicle starts, the vehicle controller first detects whether the vehicle is in the running state. If it is not started, all heat dissipation components are turned off to reduce energy consumption. When the vehicle starts and the first radiator functions normally, the direct-through solenoid valve 1 and direct-through solenoid valve 2 open, the first motor cooling circuit is connected, and at the same time, the direct-through solenoid valve 3 and direct-through solenoid valve 4 close, and the second motor cooling circuit is disconnected. At this time, the low-pressure water pump and high-pressure water pump maintain the basic heat dissipation demand at a low speed. When it is detected that the first radiator has failed, the vehicle controller disconnects the first motor cooling circuit and connects the second motor cooling circuit to maintain the system operation with the second radiator.

[0043] This embodiment ensures that the system can still work continuously when the first radiator fails through the intelligent switching of the solenoid valve, improving the operation reliability of the equipment. The speed control strategy based on temperature data effectively reduces energy consumption while ensuring the heat dissipation efficiency, avoiding the energy waste caused by the continuous full-load operation of the heat dissipation components in the traditional solution. By integrating the control logic to uniformly manage the brake and motor cooling systems, the number of control units and the system complexity are reduced.

[0044] In some embodiments, when the wet disc brake temperature is greater than or equal to 65°C and less than 75°C, the vehicle controller controls the high-pressure water pump and the second radiator fan to operate at a low gear; when the wet disc brake temperature is greater than or equal to 75°C and less than 90°C, the vehicle controller controls the high-pressure water pump to operate at a low gear and the second radiator fan to operate at a high gear.

[0045] In this embodiment, the low gear operation of the high-pressure water pump means driving the coolant to circulate at a basic flow rate. The low gear operation of the second radiator fan means dissipating heat with a conventional air volume. In the temperature range of 65°C to 75°C, the high-pressure water pump maintains a low rotational speed to maintain the basic circulation flow rate of the brake fluid. At this time, the second radiator fan starts to operate in the low gear synchronously to form forced convection heat dissipation. When the temperature rises to 75°C, the low rotational speed of the high-pressure water pump is maintained to avoid overload, and at the same time, the rotational speed of the second radiator fan is increased to the high gear to enhance the heat exchange efficiency on the radiator surface by increasing the air flow rate per unit time. This phased regulation mechanism can not only match the heat dissipation requirements of different temperature rise stages of the brake, but also avoid energy waste through the precise matching of the equipment operating states.

[0046] Further, when the temperature of the wet disc brake is greater than or equal to 90°C, the vehicle controller controls the high-pressure water pump, the first radiator fan, and the second radiator fan to operate in the high gear; when the temperature of the wet disc brake is less than 65°C, the vehicle controller controls the second radiator fan to stop working.

[0047] In this embodiment, the high gear operation of the high-pressure water pump means increasing the rotational speed of the water pump to the preset upper limit value. The high gear operation of the first radiator fan and the second radiator fan means making the rotational speed of the fan impeller reach the maximum design rotational speed to improve the air convection efficiency. When the temperature sensor detects that the temperature of the wet disc brake exceeds the 90°C threshold, the vehicle controller sends a rotational speed increase command to the drive module of the high-pressure water pump and sends a full-speed operation signal to the fan controllers of the two radiators at the same time. At this time, the flow rate of the coolant in the brake cooling circuit increases, and the forced convection heat transfer capabilities of the two radiators reach the peak synchronously, realizing the rapid export of heat. When the temperature of the brake is less than 65°C, the controller only maintains the basic rotational speed of the high-pressure water pump and closes the air forced convection function of the second radiator fan, retaining the heat dissipation capacity of the first radiator to avoid energy waste caused by excessive heat dissipation.

[0048] In some embodiments, when the temperature of the motor is greater than or equal to 65°C and less than 75°C, the vehicle controller controls the low-pressure water pump and the first radiator fan to operate in the low gear; when the temperature of the motor is greater than or equal to 75°C and less than 90°C, the vehicle controller controls the low-pressure water pump to operate in the low gear and the first radiator fan to operate in the high gear.

[0049] In this embodiment, when the temperature sensor detects that the motor is in the range of 65°C - 75°C, a basic cooling flow rate is formed by maintaining the rotational speed of the low-pressure water pump in the low gear and making the first radiator fan operate in the low gear. When the temperature rises to the range of 75°C - 90°C, the low-pressure water pump is maintained in the low gear to avoid a sharp increase in energy consumption, but the rotational speed of the fan is increased to the high gear to enhance the air convection heat dissipation efficiency.

[0050] Further, when the motor temperature is greater than or equal to 90°C, the vehicle controller controls the low-pressure water pump and the first radiator fan to operate at a high gear; when the motor temperature is less than 65°C and the brake temperature is less than 90°C, the vehicle controller controls the first radiator fan to stop working.

[0051] In this embodiment, when the motor temperature reaches 90°C, the rotational speed of the low-pressure water pump is increased to a preset high gear to accelerate the coolant circulation rate. At the same time, the first radiator fan is synchronously switched to operate at a high gear, and double-enhanced heat dissipation is achieved by enhancing the air flow rate on the radiator surface. When the motor temperature is less than 65°C and the brake temperature is less than 90°C, the first radiator fan stops running to eliminate ineffective heat dissipation energy consumption. At this time, the low-pressure water pump maintains the basic rotational speed to ensure the continuous flow of the coolant. This control strategy activates the composite heat dissipation mechanism under high-temperature conditions and implements energy consumption optimization under low-temperature conditions by establishing a dynamic association between temperature and the operating state of the equipment. At the same time, the basic operating state of the low-pressure water pump is retained to provide support conditions for redundant heat dissipation in case of radiator failure.

[0052] Other components and operations of the integrated heat dissipation system and control method for new energy mining vehicles according to the embodiments of the present invention are known to those of ordinary skill in the art and will not be described in detail here.

[0053] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms are not necessarily directed to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0054] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the claims and their equivalents.

Claims

1. An integrated heat dissipation system for a new energy mining vehicle, characterized in that: include: A first radiator and a second radiator having two inlets and two outlets respectively, a low-pressure water pump, a high-pressure water pump, a motor controller, a drive motor, a wet disc brake and a vehicle controller; The first radiator, the second radiator, the low-pressure water pump, the high-pressure water pump, the motor controller, the drive motor and the wet disc brake are all connected to the vehicle controller by signal; The first outlet of the first radiator is connected in series with the first inlet of the second radiator, the second outlet of the second radiator, the high-pressure water pump, the wet disc brake and the first inlet of the first radiator through a pipeline to form a brake cooling circuit; The second outlet of the first radiator is connected in series with the low-pressure water pump, the motor controller, the drive motor and the second inlet of the first radiator in sequence through a pipeline to form a first motor cooling circuit.

2. The integrated heat dissipation system for a new energy mining vehicle according to claim 1, characterized in that: It also includes a first through electronic valve and a second through electronic valve, both of which are connected to the vehicle controller signal; The first direct electronic valve is installed on the pipeline between the second outlet of the first radiator and the low-pressure water pump; the second direct electronic valve is installed on the pipeline from the drive motor to the second inlet of the first radiator.

3. The integrated heat dissipation system for a new energy mining vehicle according to claim 2, characterized in that: The first outlet of the second radiator is connected in series with the low-pressure water pump, the motor controller, the drive motor, and the second inlet of the second radiator in sequence through a pipeline to form a second motor cooling circuit.

4. The integrated heat dissipation system for a new energy mining vehicle according to claim 3, characterized in that: It also includes a direct electronic valve 3 and a direct electronic valve 4, both of which are connected to the vehicle controller signal; The direct electronic valve three is installed on the pipeline from the first outlet of the second radiator to the low-pressure water pump; the direct electronic valve four is installed on the pipeline from the drive motor to the second inlet of the second radiator.

5. The integrated heat dissipation system for a new energy mining vehicle according to claim 4, characterized in that: Also included are cross-connectors and tee-connectors; The direct electronic valve 1 is connected to the low-pressure water pump through a four-way joint, the direct electronic valve 3 is connected to the low-pressure water pump through a four-way joint, and the water outlet of the motor expansion water tank is connected to the four-way joint; The second outlet of the second radiator is connected to the high-pressure water pump through a three-way joint, and the water outlet of the brake expansion water tank is connected to the three-way joint.

6. A control method for an integrated heat dissipation system for a new energy mining vehicle, characterized in that: The integrated heat dissipation system for a new energy mining vehicle as claimed in any one of claims 1 to 5 comprises: The vehicle controller checks whether the vehicle is in the on state and whether the first radiator fails; If the vehicle is not in the on state, the vehicle controller controls the low-pressure water pump, the high-pressure water pump, the first radiator fan and the second radiator fan to stop working; If the vehicle is in the on state and the first radiator is normal, the vehicle controller controls the direct electronic valve 1 and the direct electronic valve 2 to open, the direct electronic valve 3 and the direct electronic valve 4 to close, and controls the low-pressure water pump and the high-pressure water pump to work at a low gear; If the vehicle is in the on state and the first radiator fails, the vehicle controller controls the direct electronic valve 1 and the direct electronic valve 2 to close, the direct electronic valve 3 and the direct electronic valve 4 to open, and controls the low-pressure water pump and the high-pressure water pump to work at a low gear; During vehicle operation, the vehicle controller adjusts the working gears of the low-pressure water pump, the high-pressure water pump, the first radiator fan and the second radiator fan according to the wet disc brake temperature and the motor temperature.

7. The control method for the integrated heat dissipation system for a new energy mining vehicle according to claim 6, characterized in that: When the wet disc brake temperature is greater than or equal to 65°C and less than 75°C, the vehicle controller controls the high-pressure water pump and the second radiator fan to work at low gear; When the wet disc brake temperature is greater than or equal to 75°C and less than 90°C, the vehicle controller controls the high-pressure water pump to work at a low gear and the second radiator fan to work at a high gear.

8. The control method for the integrated heat dissipation system for a new energy mining vehicle according to claim 7, characterized in that: When the wet disc brake temperature is greater than or equal to 90°C, the vehicle controller controls the high-pressure water pump, the first radiator fan and the second radiator fan to work in high gear; When the wet disc brake temperature is less than 65°C, the vehicle controller controls the second radiator fan to stop working.

9. The control method for the integrated heat dissipation system for a new energy mining vehicle according to claim 6, characterized in that: When the motor temperature is greater than or equal to 65°C and less than 75°C, the vehicle controller controls the low-pressure water pump and the first radiator fan to work at low gear; When the motor temperature is greater than or equal to 75°C and less than 90°C, the vehicle controller controls the low-pressure water pump to operate at a low gear and the first radiator fan to operate at a high gear.

10. The control method for the integrated heat dissipation system for a new energy mining vehicle according to claim 9, characterized in that: When the motor temperature is greater than or equal to 90°C, the vehicle controller controls the low-pressure water pump and the first radiator fan to work at a high position; When the motor temperature is less than 65°C and the brake temperature is less than 90°C, the vehicle controller controls the first radiator fan to stop working.

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