Heat management method and device for extended-range energy system

Abstract

This invention relates to the field of thermal management technology and provides a thermal management method and apparatus for a range-extended energy system. The method includes the following steps: acquiring real-time operating parameters of the range-extended energy system; calculating the current target cooling speed of the system in real-time based on the operating parameters; determining whether the range extender is shut down and / or whether the temperature of each component is too high, obtaining a judgment result; selecting a cooling mode based on the judgment result and obtaining the required speed based on the accelerator pedal opening; and outputting a requested speed for the drive motor based on the required speed corresponding to the current accelerator pedal opening and the target cooling speed, thereby controlling the injection drive device used to provide driving power to simultaneously provide water pressure to cool each component. This invention achieves an optimal balance between efficient heat dissipation and energy consumption, thereby significantly improving the thermal stability, driving range, and reliability of the range-extended energy system.

Description

Technical Field

[0001] This invention belongs to the field of thermal management technology, and particularly relates to a thermal management method and apparatus for a range-extended energy system. Background Technology

[0002] As the automotive and motorcycle (motorboat) industries gradually shift towards new energy electric vehicles and electric motorcycles (motorboats), represented by electrification, electric motorboats have significant advantages over gasoline-powered motorboats in terms of energy saving, emission reduction, low noise, and low vibration. Compared to gasoline-powered motorboats, electric motorboats avoid the environmental pollution problems caused by exhaust emissions, engine noise issues, and fuel cost problems. However, due to limited space, electric motorboats have smaller battery capacities, resulting in a shorter driving range.

[0003] However, due to current technological barriers in power batteries, insufficient range remains the biggest problem for pure electric vehicles and motorboats. To address this range issue, range-extended electric motorboats are currently being developed that use other energy sources (gasoline) to replenish power when battery energy is insufficient or depleted. Range-extended electric vehicles and motorboats have become a key research area before breakthroughs in battery technology. While range-extended electric vehicle technology is maturing, range-extended electric motorboats are currently in their infancy. Therefore, it is necessary to design a thermal management control logic for range-extended electric motorboats to improve their reliability and thermal stability, achieving advantages such as low fuel consumption, good thermal stability, and fast power response. Summary of the Invention

[0004] The purpose of this invention is to provide a thermal management method for a range-extended energy system, aiming to solve the above-mentioned technical problems.

[0005] This invention is implemented as follows: a thermal management method for a range-extended energy system, applied to a range extender, includes the following steps:

[0006] The real-time operating parameters of the range extender energy system are obtained; the operating parameters include the operating status of the range extender, the temperature of each component of the system, and the accelerator pedal opening.

[0007] The target cooling speed of the current system is calculated in real time using the aforementioned operating parameters;

[0008] Determine whether the range extender has stopped in the operating parameters, and / or determine whether the temperature of each component in the operating parameters is too high, and obtain the determination result;

[0009] Select the cooling mode based on the judgment result, and obtain the required speed based on the accelerator pedal opening;

[0010] Based on the required speed and target cooling speed corresponding to the current accelerator pedal opening, the drive motor is output to request a certain speed in order to control the injection drive device used to provide driving power and simultaneously provide water pressure to cool the various components.

[0011] Furthermore, the method for determining the operating status of the range extender is as follows: it is determined whether the real-time speed of the generator is greater than the rated starting speed of the range extender; if the real-time speed is less than the rated starting speed of the range extender, it is determined that the range extender is stopped; otherwise, it is determined that the range extender is operating normally.

[0012] Furthermore, the steps of determining whether the range extender has stopped in the operating parameters, and / or determining whether the temperature of each component in the operating parameters is too high, and obtaining the determination results, specifically include:

[0013] Determine whether the range extender is shut down in the operating parameters: if not, control the range extender energy system to adopt the range extender cooling mode; if yes, determine whether the temperature of each component in the operating parameters is too high: if yes, control the range extender energy system to adopt the forced cooling mode.

[0014] Furthermore, methods for obtaining the required engine speed based on the accelerator pedal opening include:

[0015] The accelerator pedal opening is 0-100%. Among them, the required speed is 0 when the throttle threshold is 0-3% and the required speed is 6500rpm when the full throttle threshold is 95%-100%; the required speed is 1200-6500rpm when the throttle threshold is 3%-95%.

[0016] Furthermore, the method for determining whether the temperature of each component in the operating parameters is too high is as follows: the real-time temperature of each component in the system is judged according to its own preset different temperature thresholds, and different handling measures are corresponding to them; wherein the different temperature thresholds include cooling temperature calibration threshold, over-temperature warning temperature calibration threshold, and over-temperature alarm temperature calibration threshold; wherein the over-temperature alarm temperature calibration threshold is greater than the over-temperature warning temperature calibration threshold, and the warning temperature calibration threshold is greater than the cooling temperature calibration threshold.

[0017] Furthermore, it also includes:

[0018] Obtain the real-time temperature of each component of the range-extended energy system;

[0019] Determine whether the real-time temperature of each component in the system has reached the cooling temperature calibration threshold.

[0020] Determine whether the real-time temperature of each component of the system has reached the overheat warning temperature calibration threshold;

[0021] Determine whether the real-time temperature of each component in the system has reached the over-high alarm temperature calibration threshold.

[0022] Furthermore, if the real-time temperature of each component of the system does not reach the cooling temperature calibration threshold, the system temperature is determined to be normal; if the real-time temperature of each component of the system reaches the cooling temperature calibration threshold, the system sets a minimum target cooling speed; the minimum target cooling speed is 1200-1350 rpm.

[0023] Furthermore, it also includes:

[0024] If the real-time temperature of the system components reaches the overheat warning temperature calibration threshold, the system limits the output power of each overheat warning component.

[0025] Another object of the present invention is to provide a thermal management device for a range-extended energy system, comprising:

[0026] The main cooling water circuit unit includes a two-in-one controller, an air conditioning condenser, an engine, and a water-cooled muffler connected in sequence;

[0027] The auxiliary cooling water circuit unit includes the motor and electronic control heat dissipation channels corresponding to the generator and drive motor;

[0028] The water-powered unit includes a jet drive device;

[0029] The system controller is used to execute the thermal management method of the range-extended energy system described above.

[0030] Furthermore, the injection drive device is used to provide driving power, while also providing water flow pressure to supply water to the cooling channels or heat sinks of various components of the system for heat exchange. At the same time, the injection pressure and the propulsion force of the engine's own mechanical water pump are used to cool the engine.

[0031] The thermal management method for range-extended energy systems provided by this invention deeply integrates the cooling system with the propulsion system, and intelligently responds to driving power and heat dissipation needs simultaneously using the same drive motor speed. Without the need for a separate water pump, it achieves an optimal balance between efficient heat dissipation and energy consumption, thereby significantly improving the thermal stability, driving range, and reliability of the range-extended energy system. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the thermal management device of the range-extended energy system provided in an embodiment of the present invention.

[0033] Figure 2 This is a schematic flowchart of a thermal management method for a range-extended energy system provided in an embodiment of the present invention.

[0034] Figure 3 This diagram illustrates the settings for different temperature thresholds.

[0035] Figure 4This is a flowchart illustrating the method for determining the real-time temperature of each component in the system. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0037] To address the problems in the background technology, embodiments of the present invention provide a thermal management method and apparatus for a range-extended energy system, wherein the improvements include:

[0038] 1. The entire water circulation system is driven by a jet drive device, which is expanded to two water inlets to ensure the system's heat dissipation requirements and high system heat exchange efficiency, eliminating the need for an electronic water pump to drive heat dissipation.

[0039] 2. Flexibly identify the driver's driving needs and the system's heat dissipation needs, and set the driver's stationary drive motor operating speed to ensure heat dissipation while optimizing stationary energy consumption;

[0040] 3. Real-time identification of system heat dissipation needs and various temperature states, proactive and timely implementation of corresponding measures. When a heat dissipation system malfunctions, the system proactively addresses the issue to prevent individual components from triggering overheating faults and thus passively and suddenly stopping operation.

[0041] Specifically, such as Figure 1 As shown, in one embodiment of the present invention, a thermal management device for a range-extended energy system is provided, comprising:

[0042] The main cooling water circuit unit includes a two-in-one controller, an air conditioning condenser, an engine, and a water-cooled muffler connected in sequence;

[0043] The auxiliary cooling water circuit unit includes the heat dissipation channels for the generator (motor, electronic control) and the drive motor (motor, electronic control);

[0044] The hydrodynamic unit includes a jet propulsion device; for motorboats, the hydrodynamic unit may also include a hull inlet / outlet and a sluice gate.

[0045] The system controller is used to implement the thermal management methods of the range-extended energy system.

[0046] The aforementioned range-extended energy system can be used in range-extended electric motorboats for outdoor engineering machinery. By equipping outdoor engineering machinery with a range-extended energy system, compared to a power generation system, the range-extended energy system operates within its optimal speed range, resulting in high efficiency and low emissions. It can also switch to pure electric mode, achieving zero emissions and low noise. Compared to a pure electric energy system, it saves charging time and battery pack costs, and meets the short-term high-power electricity demands of the motorboat. Furthermore, by flexibly identifying driver driving needs and system cooling requirements, it ensures both on-site power generation and cooling while reducing system energy consumption, thus improving the range and thermal stability of the range-extended electric motorboat.

[0047] It should be noted that the thermal management system provided in this embodiment of the invention can be applied not only to range-extended motorboats, but also to range-extended energy systems for vehicles such as range-extended motorcycles and range-extended cars, as well as outdoor engineering machinery.

[0048] In practical applications, the range extender energy system consists of an engine and an ISG generator, which together supply power to the battery pack and the load drive motor. The engine is connected to the engine controller (ECU), which is used to control the normal operation of the engine. The ISG generator is both a motor and an electronic control unit. At the same time, the motor drive shaft is connected to the engine flywheel via a spline, which can realize the functions of starting and stopping the engine, assisting the engine rotation and generating electricity, replacing the starter motor that is built into the traditional engine, and also playing a role in quickly starting the engine in low-temperature environments.

[0049] The jet drive device is used to provide driving power and water pressure to supply water to the cooling channels or heat sinks of various components of the hull bottom supply system (ISG motor, electronic control, drive motor, electronic control heat dissipation, etc.) for heat exchange. At the same time, the jet pressure and the propulsion force of the engine's own mechanical water pump are used to dissipate heat from the engine, ensuring the normal operating temperature of the range extender when generating high power.

[0050] The air conditioning condenser is used for thermal management of the battery pack. The battery pack can be a high-voltage power type, mainly used for rapid response to short-term high-power demands of the drive motor during engine starting and power compensation. Typically, the battery pack temperature is maintained between 30-40℃ to prevent overheating. When the battery pack temperature is too high, the refrigerant in the air conditioning condenser can dissipate heat, ensuring the battery pack's operating temperature and allowing the range-extended energy system to operate at high temperatures for extended periods, meeting customer application scenarios.

[0051] The 2-in-1 controller includes a step-down DC-DC converter and a slow-charge OBC controller. The step-down DC-DC converter converts the high-voltage DC power from the high-voltage battery pack into a low-voltage DC power supply, which can charge the battery and prevent it from running out of power. The slow-charge OBC controller is used to initiate the system to request battery pack charging after the customer plugs in the charger in place, and then charges the battery to meet the need for on-site battery recharging.

[0052] The whole-boat water circulation provided in this embodiment of the invention is driven by a jet drive device and expanded to two water inlets to ensure the system's heat dissipation needs. It has high heat exchange efficiency and does not require an electronic water pump to drive heat dissipation. It can prevent the engine, ISG motor or drive motor from overheating during long-term operation, as well as situations such as insufficient power generation and limited drive during continuous use.

[0053] Both the main cooling water circuit unit and the auxiliary cooling water circuit unit can be composed of inlet and outlet water ports and water pipes. The inlet water port can output water flow from the bottom of the boat and connect to different heat-generating components through water pipe interfaces. Finally, the absorbed heat flows out from the outlet water port and returns to the lake.

[0054] The system controller (VCU) communicates with the ISG motor controller, drive motor controller, engine controller, dual-function controller, battery pack, and air conditioning condenser via a CAN bus, enabling real-time acquisition of the temperature of each component and control of its operation.

[0055] like Figure 2 As shown, in another embodiment of the present invention, a thermal management method for a range-extended energy system, applied to a range extender, is also provided, comprising the following steps:

[0056] S10. Obtain the real-time operating parameters of the range extender energy system; the operating parameters include the operating status of the range extender, the temperature of each component of the system, and the accelerator pedal opening.

[0057] S20. Calculate the current system target cooling speed in real time using the aforementioned operating parameters;

[0058] S30. Determine whether the range extender is stopped in the operating parameters; if yes, proceed to step S40, otherwise proceed to step S50.

[0059] S40. Determine whether the temperature of each component in the working parameters is too high; if so, proceed to step S60; otherwise, proceed to step S70.

[0060] S50. Control the range-extending energy system to adopt the range-extending heat dissipation mode;

[0061] S60. Control the range extender energy system to adopt a forced (active) cooling mode;

[0062] S70: Obtain the required engine speed based on the accelerator pedal opening;

[0063] S80: Based on the required speed and target cooling speed corresponding to the current accelerator pedal opening, output the requested speed of the drive motor to control the injection drive device used to provide driving power and simultaneously provide water pressure to cool each component.

[0064] The method for determining the operating status of the range extender is as follows: it is determined whether the real-time speed of the generator is greater than the rated starting speed of the range extender (e.g., 300 rpm); if the real-time speed is less than the rated starting speed of the range extender, the range extender is determined to be shut down; otherwise, the range extender is determined to be operating normally.

[0065] In this embodiment of the invention, a "one-drive, dual-control" thermal management method is proposed by deeply integrating the propulsion and heat dissipation functions of the range-extended energy system through the same injection drive device. This method intelligently decides the heat dissipation mode and dynamically coordinates the drive speed by real-time fusion of the driver's throttle demand and the temperature status of various system components. This achieves both satisfactory driving dynamic response and efficient system heat dissipation and temperature stability without a separate cooling water pump, ultimately achieving multiple technical effects such as simplified structure, reduced energy consumption, and improved reliability.

[0066] In a preferred embodiment of the present invention, the operating parameters include whether the real-time temperature of each component (engine, generator, drive motor, two-in-one controller, etc.) connected via CAN bus is greater than the calibrated over-temperature threshold of the corresponding component. When the temperature of each component is greater than the calibrated over-temperature threshold of the corresponding component, the system determines that the component temperature is too high and needs to actively dissipate heat, and limits the system's maximum output capacity. Conversely, the system determines that the system temperature is normal.

[0067] In a preferred embodiment of the present invention, the driver's required speed is obtained by analyzing the accelerator pedal opening. Specifically, the accelerator pedal opening is 0-100%, wherein the required speed corresponding to the empty accelerator threshold of 0-3% is 0, and the required speed corresponding to the full accelerator threshold of 95%-100% is 6500 rpm, which is used to eliminate small errors caused by accelerator installation; the required speed corresponding to the accelerator threshold of 3%-95% is 1200-6500 rpm, that is, after the driver presses the accelerator, there is a driving demand, and the minimum speed is 1200 rpm, which is used to ensure the establishment of the water flow pressure at the inlet of the system cooling system and the operation of the cooling of each component.

[0068] In a preferred embodiment of the present invention, if it is determined that the temperature of each component in the operating parameters is too high, the range extender energy system is controlled to adopt an active cooling mode, with the system's minimum and maximum speed limited to 0-3500 rpm. The method for determining whether the temperature of each component in the operating parameters is too high is as follows: the real-time temperature of each component in the system is judged according to its own preset temperature threshold, and different handling measures are correspondingly taken; for example... Figure 3 As shown ( Figure 3 The values ​​in the table represent temperatures in °C. Different temperature thresholds include a cooling temperature calibration threshold, an overheat warning temperature calibration threshold, and an overheat alarm temperature calibration threshold. The overheat alarm temperature calibration threshold is greater than the overheat warning temperature calibration threshold, and the warning temperature calibration threshold is greater than the cooling temperature calibration threshold.

[0069] like Figure 4 As shown, in a preferred embodiment of the present invention, the method for determining the real-time temperature of each component of the system is as follows:

[0070] Obtain the real-time temperature of each component of the range-extended energy system;

[0071] Determine whether the real-time temperature of each component in the system has reached the cooling temperature calibration threshold.

[0072] Determine whether the real-time temperature of each component of the system has reached the overheat warning temperature calibration threshold;

[0073] Determine whether the real-time temperature of each component in the system has reached the over-high alarm temperature calibration threshold.

[0074] In practical applications, if the real-time temperature of each component in the system reaches the cooling temperature calibration threshold, it is determined whether the real-time temperature of each component in the system has reached the overheat warning temperature calibration threshold; if the real-time temperature of each component in the system reaches the overheat warning temperature calibration threshold, it is then determined whether the real-time temperature of each component in the system has reached the overheat alarm temperature calibration threshold; if the real-time temperature of each component in the system reaches the overheat alarm temperature calibration threshold, an overheat alarm is triggered, and the system is automatically shut down and the high pressure is reduced.

[0075] In addition, if the real-time temperature of each component of the system does not reach the cooling temperature calibration threshold, the system temperature is judged to be normal; if the real-time temperature of each component of the system reaches the cooling temperature calibration threshold, the system sets a minimum target cooling speed; the minimum target cooling speed is 1200-1350 rpm.

[0076] If the real-time temperature of the system components reaches the overheat warning temperature calibration threshold, the system limits the output power of each overheat warning component and actively reduces the system load. Specifically, if an overheat warning is detected for the buck DC-CDC controller, the system reduces the buck DC-CDC power in advance, limiting the maximum speed to 3500 rpm; if an overheat warning is detected for the drive motor and its electronic control system, the system reduces the drive motor speed in advance, limiting the maximum speed to 1500 rpm. If an overheat warning is detected for the engine, ISG motor, and its electronic control system, the system reduces the range extender's power generation in advance, limiting the maximum speed to 1500 rpm.

[0077] In a preferred embodiment of the present invention, the target cooling speed is calculated in step S20 as follows: based on the operating status of the range extender, the temperature of each component in the system, and other operating parameters, the required target cooling speed is calculated in real time by looking up a table (temperature-speed mapping table) or an interpolation algorithm, specifically including the following steps:

[0078] S21. Determine the heat dissipation mode based on the operating status of the range extender and the temperature of each component in the system. In practical applications, the heat dissipation mode selection method is as follows: If it is determined that the range extender has not stopped in the operating parameters, then control the range extender energy system to adopt the range extender heat dissipation mode; if it is determined that the range extender has stopped in the operating parameters, and the temperature of each component in the operating parameters is too high, then control the range extender energy system to adopt the forced heat dissipation mode; if it is determined that the range extender has stopped in the operating parameters, and the temperature of each component in the operating parameters is not too high, then control the range extender energy system to adopt the normal / standby mode.

[0079] S22. If the range extender cooling mode is used: In this mode, the range extender operates normally, and the system sets the final target cooling speed N. cool_target The minimum speed limit L1 (e.g., L1 = 1350 rpm) is sufficient to ensure that power generation and heat dissipation proceed synchronously and stably.

[0080] If the normal / standby mode is used: In this mode, the range extender is stopped and the temperature of each component is normal. No additional cooling power is required for each component. The system sets the final target cooling speed to the second minimum speed limit L2=0, that is, the speed of the drive motor is not limited.

[0081] If forced cooling mode is used: In this mode, if the range extender stops and component temperatures are too high, the final target cooling speed should be determined as follows:

[0082] The required cooling speed for each unit is calculated based on the temperature and heat dissipation mode of each component. The system controller collects the temperature values ​​(T) of each key thermal management component (including but not limited to the engine, ISG motor and its electronic control, drive motor and its electronic control, and the two-in-one controller) in real time via the CAN bus. i (Where i represents the component number); For each component i, the system pre-stores a "temperature-cooling speed" basic mapping table. This table is set according to the component characteristics and typically includes three key temperature thresholds: cooling temperature calibration threshold T. cool_i The initial temperature at which active cooling is required; the overheat warning temperature calibration threshold T. warn_i Temperatures requiring warning and performance limiting; overheat alarm temperature calibration threshold T. alarm_i Temperature requiring emergency protection. Ultimate target cooling speed N. cool_target And the required cooling speed N for each individual component req_i Based on its real-time temperature T i Determined according to the following rules:

[0083] If T i <T cool_i Then N req_i =0 indicates that the component does not require additional cooling power;

[0084] If T cool_i ≤T i Then N req_i =min(N min_cool +k·(T i -T cool_i ), N max_cool ); where N min_cool To ensure the minimum cooling speed required for system heat dissipation (e.g., 1200 rpm), N max_cool To ensure the system can dissipate heat, the maximum cooling speed required (e.g., 1350 rpm) is determined, where k is a proportionality coefficient. This calculation ensures that the cooling intensity increases smoothly with the temperature rise, and the system can increase the speed and water flow according to the cooling temperature gradient. The final target cooling speed is set to the third minimum speed limit L3, where L3 is equal to the maximum value of the individual cooling speed required by all components.

[0085] In addition, in step S80, the calculation method for the requested speed of the drive motor is as follows: Based on the judgment results of "whether the range extender is stopped" and "whether the component temperature is too high", the system selects the heat dissipation mode and uses the corresponding fusion algorithm to calculate the required speed N corresponding to the current throttle pedal opening. driver And the final target cooling speed calculation drive motor requested speed N req_final The details are as follows:

[0086] Mode 1: Range Extender Cooling Mode (Range Extender Operation); In this mode, priority is given to ensuring efficient power generation and basic cooling of the range extender, while also responding to driving demands. The fusion algorithm for this mode is:

[0087] N req_final =max(N driver ,L1 );

[0088] It should be noted that in this mode, the final drive motor's requested speed must simultaneously meet driving and cooling requirements; this mode ensures that heat dissipation is forcibly guaranteed during power generation.

[0089] Mode 2: Normal Driving / Standby Mode (Range Extender off, temperature normal); In this mode, it fully responds to driving needs, and the cooling system operates with minimal energy consumption. The fusion algorithm for this mode is:

[0090] N req_final =N driver ;

[0091] It should be noted that in this mode, due to Ncool_target When the temperature is normal, the speed is equal to 0, so the final speed is entirely determined by the driver, achieving optimal energy efficiency.

[0092] Mode 3: Forced Cooling Mode (Range Extender shuts down, but component temperatures are too high); in this mode, cooling is the highest priority task, temporarily exceeding some of the driver's needs to protect the system. The fusion algorithm for this mode is:

[0093] N req_final =min( N max_force , max( N driver , L3) );

[0094] It should be noted that in this mode, the system prioritizes cooling needs, but does not completely ignore driving requirements; if the driver's needs are higher, the system will operate according to those needs (because higher RPMs also contribute to heat dissipation); if cooling needs are higher, the system will operate according to cooling needs; however, the maximum RPM is limited to no more than the forced cooling limit N. max_force Within this range, a balance is achieved between efficient heat dissipation and system safety; whereby, when all components meet T... i < warn_i Then the system sets a forced heat dissipation limit N. max_force =6500rpm; when a component satisfies T warn_i ≤T i <T alarm_i Then the system sets a forced cooling limit N. max_force The speed range is 1500-3500 rpm, depending on the component type. For example, the N value corresponds to a buck DC-DC controller. max_force =3500rpm, MCU motor and its corresponding N max_force =1500rpm, N corresponding to the engine, ISG motor and its electronic control max_force =1500rpm; when a component satisfies T i ≥T alarm_i The system overheats and alarms, shuts down under high pressure, and sets a forced cooling limit of N. max_force =0.

[0095] In addition, the system controller will request the drive motor speed N calculated above. req_final The request is sent to the drive motor controller via the CAN bus, which drives the injection drive unit to operate; the requested speed of the drive motor also determines the propulsion force and the flow rate of the cooling water circulation.

[0096] It should be understood that although the steps in the flowcharts of the embodiments of the present invention are shown sequentially according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some steps in each embodiment may include multiple sub-steps or multiple stages. These sub-steps or stages are not necessarily completed at the same time, but can be executed at different times. The execution order of these sub-steps or stages is not necessarily sequential, but can be performed alternately or in turn with other steps or at least a portion of the sub-steps or stages of other steps.

[0097] Those skilled in the art will understand that all or part of the processes in the above embodiments can be implemented by a computer program instructing related hardware. The program can be stored in a non-volatile computer-readable storage medium, and when executed, it can include the processes of the embodiments of the above methods.

[0098] The above embodiments merely illustrate several implementation methods of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this patent should be determined by the appended claims.

Claims

1. A thermal management method for a range extender energy system, applied to a range extender, characterized in that, Includes the following steps: The real-time operating parameters of the range extender energy system are obtained; the operating parameters include the operating status of the range extender, the temperature of each component of the system, and the accelerator pedal opening. The target cooling speed of the current system is calculated in real time using the aforementioned operating parameters; Determine whether the range extender has stopped in the operating parameters, and / or determine whether the temperature of each component in the operating parameters is too high, and obtain the determination result; Select the cooling mode based on the judgment result, and obtain the required speed based on the accelerator pedal opening; Based on the required speed and target cooling speed corresponding to the current accelerator pedal opening, the drive motor is output to request speed in order to control the injection drive device used to provide driving power and at the same time provide water pressure to cool down each component. The steps for determining whether the range extender has stopped in the operating parameters and / or whether the temperature of each component in the operating parameters is too high, and obtaining the determination results, specifically include: Determine whether the range extender is shut down in the operating parameters: if not, control the range extender energy system to adopt the range extender cooling mode; if yes, determine whether the temperature of each component in the operating parameters is too high: if yes, control the range extender energy system to adopt the forced cooling mode.

2. The thermal management method for a range-extended energy system according to claim 1, characterized in that, The method for determining the operating status of the range extender is as follows: determine whether the real-time speed of the generator is greater than the rated starting speed of the range extender; if the real-time speed is less than the rated starting speed of the range extender, then determine that the range extender is stopped; otherwise, determine that the range extender is operating normally.

3. The thermal management method for a range-extended energy system according to claim 1, characterized in that, Methods for obtaining the required engine speed based on the accelerator pedal opening include: The accelerator pedal opening is 0-100%. Among them, the required speed is 0 when the throttle threshold is 0-3% and the required speed is 6500rpm when the full throttle threshold is 95%-100%; the required speed is 1200-6500rpm when the throttle threshold is 3%-95%.

4. The thermal management method for a range-extended energy system according to claim 1, characterized in that, The method for determining whether the temperature of each component in the operating parameters is too high is as follows: the real-time temperature of each component in the system is judged according to its own preset temperature threshold, and corresponding processing measures are taken accordingly; wherein the different temperature thresholds include cooling temperature calibration threshold, over-temperature warning temperature calibration threshold, and over-temperature alarm temperature calibration threshold; wherein the over-temperature alarm temperature calibration threshold is greater than the over-temperature warning temperature calibration threshold, and the warning temperature calibration threshold is greater than the cooling temperature calibration threshold.

5. The thermal management method for a range-extended energy system according to claim 4, characterized in that, Also includes: Obtain the real-time temperature of each component of the range-extended energy system; Determine whether the real-time temperature of each component in the system has reached the cooling temperature calibration threshold. Determine whether the real-time temperature of each component of the system has reached the overheat warning temperature calibration threshold; Determine whether the real-time temperature of each component in the system has reached the over-high alarm temperature calibration threshold.

6. The thermal management method for a range-extended energy system according to claim 5, characterized in that, If the real-time temperature of each component of the system does not reach the cooling temperature calibration threshold, the system temperature is judged to be normal; if the real-time temperature of each component of the system reaches the cooling temperature calibration threshold, the system sets the minimum target cooling speed; the minimum target cooling speed is 1200-1350 rpm.

7. The thermal management method for a range-extended energy system according to claim 5, characterized in that, Also includes: If the real-time temperature of any component in the system reaches the overheat warning temperature calibration threshold, the system will limit the output power of each overheat warning component.

8. A thermal management device for a range-extended energy system, characterized in that, include: The main cooling water circuit unit includes a two-in-one controller, an air conditioning condenser, an engine, and a water-cooled muffler connected in sequence; The auxiliary cooling water circuit unit includes the motor and electronic control heat dissipation channels corresponding to the generator and drive motor; The water-powered unit includes a jet drive device; A system controller for performing the thermal management method of the range-extended energy system according to any one of claims 1-7.

9. The thermal management device for the range-extended energy system according to claim 8, characterized in that, The injection drive device is used to provide driving power and water flow pressure to supply water to the cooling channels or heat sinks of various components of the system for heat exchange. At the same time, the injection pressure and the propulsion force of the engine's own mechanical water pump are used to cool the engine.

Images