A control system and control method for whole vehicle thermal management of a new energy bus

Abstract

The application provides a control system and control method for whole vehicle thermal management of a new energy bus, and relates to the technical field of new energy bus thermal management. The system comprises a motor electric control cooling unit, a battery water cooling and water heating unit, a passenger cabin electric water heating unit, a passenger cabin electric cooling and heating air conditioning unit and an energy management unit. The energy management unit comprises a fluid pipeline, a valve assembly and a controller. The fluid pipeline is in communication with the motor electric control cooling unit, the battery water cooling and water heating unit, the passenger cabin electric water heating unit and the passenger cabin electric cooling and heating air conditioning unit. The valve assembly is arranged on the fluid pipeline. The controller is used for receiving running state parameters and temperature parameters uploaded by each unit, and outputting a control signal according to the obtained parameters to control the valve assembly to switch the communication state of the fluid pipeline, realize heat transfer or isolation between each unit and achieve the purpose of energy saving.

Description

Technical Field

[0001] This application relates to the field of thermal management technology for new energy buses, and in particular to a control system and control method for the overall thermal management of a new energy bus. Background Technology

[0002] The core components of new energy buses, such as motors, batteries, and electronic controls, generate a large amount of heat during operation, requiring timely heat dissipation to ensure normal operation. Simultaneously, in low-temperature environments, the driver's cabin, passenger cabin, and batteries require heating. How to efficiently integrate the waste heat from the heat-generating system with the heat demand of the heating system is a key issue that urgently needs to be addressed in the field of vehicle thermal management. Currently, some vehicle thermal management solutions exist in the industry. These include obtaining charging status through the vehicle controller and executing corresponding liquid cooling and liquid heating processes, or using multi-source sensors to collect thermal status information and transfer heat through a reconfigurable heat exchange network. Other solutions utilize fluid control components to achieve series-parallel switching control between the motor circuit and the battery circuit, or, when conditions permit, utilize the waste heat from the engine and / or motor for heating.

[0003] However, the aforementioned existing technologies still suffer from low heat utilization efficiency. While some solutions involve waste heat utilization, in actual operation they often only achieve heat transfer in a single scenario, failing to perform comprehensive and precise coordinated scheduling based on different operating conditions such as driving, parking, and charging. This results in insufficient waste heat utilization and insignificant or even ineffective energy-saving effects. Furthermore, some thermal management solutions may experience increased cooling energy consumption and system instability during non-heating seasons due to ineffective system decoupling, affecting the year-round applicability and reliability of the vehicle's thermal management system.

[0004] Therefore, there is an urgent need to develop a thermal management and control solution for new energy buses that can fully integrate the heat generation system and the heating system and automatically switch between multiple modes according to different operating conditions. Summary of the Invention

[0005] To address the aforementioned technical problems, this application provides a control system and method for the thermal management of a new energy bus. By setting up an energy management unit, each unit is interconnected via fluid pipelines. A controller intelligently switches the connection status of valve components based on multi-dimensional parameters, enabling on-demand scheduling of waste heat from the motor and electronic control system for cabin heating, battery temperature control, and heat pump operation. The technical solution is as follows: In the first aspect, a control system for the thermal management of a new energy bus is provided, including a motor and electronic control cooling unit, a battery water cooling and heating unit, a passenger cabin electric water heating unit, a passenger cabin electric cooling and heating air conditioning unit, and an energy management unit. The energy management unit includes fluid piping, valve assemblies, and a controller; The fluid pipelines are respectively connected to the motor electronic control cooling unit, the battery water cooling and heating unit, the cabin electric water heating unit, and the cabin electric cooling and heating air conditioning unit; The valve assembly is disposed on the fluid pipeline; The controller is used to receive the operating status parameters and temperature parameters uploaded by each unit, and output control signals according to the acquired parameters to control the valve assembly to switch the connection state of the fluid pipeline, thereby realizing heat transfer or isolation between the units.

[0006] In one possible implementation, the valve assembly includes a six-way electrically controlled water valve and a three-way electrically controlled water valve; The first port of the six-way electrically controlled water valve is connected to the outlet pipe of the motor electrically controlled cooling unit. The second port is connected to the return water pipe of the motor electrically controlled cooling unit and the heat pump circuit of the cabin electric heating and cooling air conditioning unit through the three-way electrically controlled water valve. The third and fourth ports are connected to the outlet pipe and return water pipe of the cabin electric water heating unit, respectively. The fifth and sixth ports are connected to the outlet pipe and return water pipe of the battery water cooling and heating unit, respectively.

[0007] In one possible implementation, water temperature sensors are provided on the outlet and return water pipes of the motor electronic control cooling unit, the outlet and return water pipes of the battery water cooling and heating unit, the outlet and return water pipes of the cabin electric water heating unit, and the heat pump circuit of the cabin electric cooling and heating air conditioning unit. The cabin electric water heating unit is also equipped with a temperature sensor to collect the cabin temperature. The cabin electric heating and cooling air conditioning unit is also equipped with a temperature sensor to collect the temperature inside and outside the cabin; Each of the water temperature sensor and air temperature sensor is electrically connected to the controller and is used to upload temperature parameters to the controller.

[0008] Secondly, a control method for thermal management of a new energy bus is provided, which is applied to the control system for thermal management of a new energy bus as described in any of the above claims, including: The controller receives the operating status parameters and temperature parameters uploaded by each unit, and determines whether the current operating condition meets the preset waste heat utilization switching conditions based on the received parameters. The waste heat utilization switching conditions include at least the heating waste heat utilization conditions, battery waste heat utilization conditions and heat pump waste heat utilization conditions. When any of the waste heat utilization switching conditions are not met, the controller outputs an independent operation signal to the valve assembly, and the valve assembly controls the motor electronic cooling unit, battery water cooling and water heating unit, cabin electric water heating unit and cabin electric cooling and heating air conditioning unit to form independent circulation loops. When one of the waste heat utilization switching conditions is met, the controller outputs a connection signal corresponding to the switching condition to the valve assembly, and the valve assembly controls the motor electronic cooling unit to connect with the corresponding unit to be heated. The unit to be heated is one of the cabin electric water heating unit, the cabin electric cooling and heating air conditioning unit, and the battery water cooling and water heating unit.

[0009] In one possible implementation, the independent operating signal is used to control the six-way electrically controlled water valve to connect the first interface to the second interface, the third interface to the fourth interface, and the fifth interface to the sixth interface, and to control the three-way electrically controlled water valve to form an independent circulation loop for the heat pump circuit of the cabin electric heating and cooling air conditioning unit.

[0010] In one possible implementation, when the controller determines that any of the waste heat utilization switching conditions are met, the connection signal is specifically used for: The six-way electrically controlled water valve is switched to the corresponding working position, so that the motor electrically controlled cooling unit can selectively connect to one of the cabin electric water heating unit, the battery water cooling and water heating unit, and the cabin electric cooling and heating air conditioning unit; at the same time, the three-way electrically controlled water valve is switched to the bypass state so that the heat pump circuit of the cabin electric cooling and heating air conditioning unit forms an independent circulation circuit, or the three-way electrically controlled water valve is switched to the conduction state so that the heat pump circuit of the cabin electric cooling and heating air conditioning unit is connected to the motor electrically controlled cooling unit.

[0011] In one possible implementation, the conditions for utilizing the waste heat from the heating system are: the motor water pump of the motor-controlled cooling unit is turned on, the cabin electric water heating unit is in heating mode, the outlet water temperature of the motor-controlled cooling unit is higher than a first preset temperature value, and the outlet water temperature is higher than the inlet water temperature of the cabin electric water heating unit. When the conditions for utilizing the waste heat of the heating system are met, the controller outputs a first connection signal to control the six-way electrically controlled water valve to connect the motor-controlled cooling unit with the cabin electric water heating unit, and at the same time controls the three-way electrically controlled water valve to switch to bypass mode.

[0012] In one possible implementation, the battery waste heat utilization conditions are as follows: the motor water pump of the motor control cooling unit is in the on state, the temperature control mode of the battery water cooling and heating unit is in the heating or cooling demand state, the outlet water temperature of the motor control cooling unit is higher than the second preset temperature value, and the difference between the outlet water temperature and the return water temperature of the battery water cooling and heating unit meets the preset temperature difference threshold range. When the battery waste heat utilization conditions are met, the controller outputs a second connection signal to control the six-way electrically controlled water valve to connect the motor electrically controlled cooling unit with the battery water cooling and heating unit, and controls the three-way electrically controlled water valve to switch to bypass state.

[0013] In one possible implementation, the waste heat utilization conditions of the heat pump are as follows: the motor water pump of the motor-controlled cooling unit is in the on state, the heat pump of the cabin electric heating and cooling air conditioning unit is in the heating mode, the outlet water temperature of the motor-controlled cooling unit is higher than a third preset temperature value, and the difference between the outlet water temperature and the return water temperature of the heat pump meets the preset heat pump temperature difference threshold. When the heat pump waste heat utilization conditions are met, the controller outputs a third connection signal to control the six-way electrically controlled water valve to connect the motor electrically controlled cooling unit to the cabin electric heating and cooling air conditioning unit via the three-way electrically controlled water valve, and controls the three-way electrically controlled water valve to switch to the conducting state.

[0014] In one possible implementation, when the controller simultaneously determines that multiple waste heat utilization switching conditions are met, it outputs the corresponding connection signal in the priority order of the heating waste heat utilization condition, the heat pump waste heat utilization condition, and the battery waste heat utilization condition.

[0015] The technical solutions provided in this application can achieve the following technical effects: (1) By setting up an energy management unit, the motor control cooling unit, battery water cooling and heating unit, cabin electric water heating unit and cabin electric cooling and heating air conditioning unit are interconnected through fluid pipelines. The controller intelligently switches the connection status of valve components according to multi-dimensional parameters, realizing the on-demand scheduling of motor control waste heat between cabin heating, battery temperature control and heat pump system, effectively improving the waste heat utilization efficiency of the whole vehicle, significantly reducing the power consumption of heating in cold regions, and extending the driving range of new energy buses.

[0016] (2) By setting multiple waste heat utilization conditions and configuring the priority logic of heat allocation, the comfort of cabin heating is prioritized during vehicle discharge conditions, while taking into account the energy efficiency optimization of heat pump and the battery temperature control requirements. At the same time, by setting an independent operation mode, the increased cooling energy consumption or system instability caused by improper system connection during the non-heating season is avoided, thus achieving the unity of efficient and coordinated utilization of vehicle heat and safe and stable system operation. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the description of the embodiments of this application will be briefly introduced below. In the drawings: Figure 1 This is a control system diagram for the thermal management of a new energy bus according to an embodiment of this application; Figure 2 yes Figure 1 An example diagram of the interface of the valve assembly in the energy management unit; Figure 3This is a flowchart illustrating a control method for thermal management of a new energy bus according to an embodiment of this application. Figure 4 This is a structural diagram of an electronic device provided in an embodiment of this application. Detailed Implementation

[0018] Exemplary embodiments of the present application will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present application are shown in the drawings, it should be understood that the present application may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this application will be thorough and complete, and will fully convey the scope of the present application to those skilled in the art.

[0019] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such use can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the term "comprising" and its variations should be interpreted as open-ended terms meaning "including but not limited to."

[0020] This application provides a control system for the thermal management of a new energy bus, such as... Figure 1 As shown, the system includes a motor and electronic control cooling unit, a battery water-cooled and water-heated unit, a cabin electric water-heating unit, a cabin electric air conditioning unit, and an energy management unit. The energy management unit, as the core of the entire system's heat dispatching, is used to realize the on-demand distribution and utilization of heat among the various units. Each unit is described in detail below.

[0021] The motor and electronic control cooling unit is used to cool the motor and electronic control components. In addition to the components described in detail below, this unit also includes other conventional components known in the art, such as heat sinks, fans, and flow meters, which will not be elaborated upon further in this application. The unit contains a motor water pump that drives the coolant circulation. As the main heat source for the vehicle's waste heat, the heat generated by the motor and electronic control components is carried away and discharged by the flowing coolant. Water temperature sensors are installed on both the outlet and return water pipes of this unit to monitor the coolant temperature flowing into and out of the motor and electronic control components in real time.

[0022] The battery water-cooling and water-heating unit is used for cooling or heating the power battery and temperature control. This unit also includes other conventional components known in the art, which will not be described in detail here. Internally, it has a battery water pump to drive the circulation of coolant and a battery heater for auxiliary heating in low-temperature environments. Water temperature sensors are installed on both the outlet and return water pipes of this unit to monitor the temperature parameters of the coolant flowing into and out of the power battery in real time, providing temperature data for the execution of the battery temperature control strategy.

[0023] The cabin electro-hydraulic heating unit provides heating to the cabin. This unit also includes other conventional components known in the art, which will not be described in detail here. Internally, it has a heater pump to drive the coolant circulation and a PTC heater to supplement the coolant with electric heating when residual heat is insufficient. Water temperature sensors are installed on both the outlet and return water lines of this unit to monitor the coolant temperature flowing into and out of the cabin's electro-hydraulic circuit in real time. An air temperature sensor is also installed in the cabin to monitor the cabin temperature in real time, providing a basis for heating control.

[0024] The cabin electric heating and cooling air conditioning unit is used to cool or heat the cabin, and when needed, it exchanges heat with the battery circuit via a plate heat exchanger to assist in cooling or heating the power battery. This unit also includes other conventional components known in the art, which will not be described in detail here. This unit is equipped with at least two temperature sensors, one for measuring the cabin interior temperature and the other for measuring the exterior temperature, i.e., the ambient temperature, to provide data for the operation of the air conditioning unit.

[0025] The energy management unit includes fluid piping, valve assemblies, and a controller. The fluid piping serves as the channel for coolant flow between the various units, connecting the motor-controlled cooling unit, battery water-cooled / heated unit, cabin electric-water heating unit, and cabin electric-cooled / heated air conditioning unit, forming the physical path for heat transfer. The valve assemblies, located on the fluid piping, include a six-way electrically controlled water valve and a three-way electrically controlled water valve, used to switch the connection state between different pipes by rotating the valve core, realizing on / off control and combined switching of each circuit. In this embodiment, as... Figure 2 As shown, the six-way electrically controlled water valve has six ports. Figure 2 The numbers 1-6 are used to represent the three ports. The three-way electrically controlled water valve has three ports, one of which connects to the second port of the six-way electrically controlled water valve. The other two ports connect to the return water pipe of the motor-controlled cooling unit and the heat pump circuit of the cabin electric heating and cooling unit, respectively. Figure 2 In the diagram, 21 represents the interface connected to the return water pipe of the motor control cooling unit, and 22 represents the interface connected to the heat pump circuit of the cabin electric heating and cooling unit.

[0026] When the energy management unit starts working, the controller first receives the operating status parameters and temperature parameters uploaded by each unit. Based on the preset control logic, it determines the current working mode to be entered and outputs the corresponding control signal to the valve assembly. The valve assembly switches the valve core position of the six-way electrically controlled water valve and the three-way electrically controlled water valve according to the control signal, thereby changing the connection state of the fluid pipeline, so that each unit forms an independent circulation loop or a waste heat utilization hybrid loop, realizing the on-demand distribution of motor electrically controlled waste heat to cabin heating, battery temperature control or heat pump.

[0027] The aforementioned operating status parameters can include the status parameters of the water pumps in each unit (such as the on / off status of the motor water pump, battery water pump, and heater water pump), air conditioning operating mode parameters (such as cooling mode, heat pump heating mode, or off status), and battery temperature control mode parameters (such as self-circulation mode, heating mode, or cooling mode), which are directly uploaded by the controllers of each unit to the controller of the energy management unit. Alternatively, the coolant flow parameters uploaded by the flow meters of each unit can be used to determine whether the water pumps in that unit are operating and whether the coolant is circulating, thus indirectly obtaining the operating status of that unit. The aforementioned temperature parameters include at least the coolant temperatures at the inlet and outlet of each unit's piping (such as the outlet and return water temperatures of the motor and electronic control systems, the battery inlet and return water temperatures, the heater inlet and return water temperatures, and the heat pump return water temperature), as well as the cabin temperature uploaded by the cabin air temperature sensor and the ambient temperature uploaded by the outside air temperature sensor.

[0028] To illustrate in detail the process by which the energy management unit achieves on-demand heat distribution through multi-mode switching, this application also provides a control method for the thermal management of a new energy bus, which is mainly executed by the energy management unit. For example... Figure 3 As shown, the control method for thermal management of new energy buses includes steps S101 to S104: Step S101: Receive the operating status parameters and temperature parameters uploaded by each unit; Step S102: Determine whether the current operating condition meets the preset waste heat utilization switching conditions based on the received parameters. Step S103: When no waste heat utilization switching conditions are met, the controller outputs an independent operation signal to the valve assembly, and the valve assembly controls the motor electronic cooling unit, battery water cooling and water heating unit, cabin electric water heating unit and cabin electric cooling and heating air conditioning unit to form independent circulation loops. Step S104: When one of the waste heat utilization switching conditions is met, the controller outputs a connection signal corresponding to the switching condition to the valve assembly. The valve assembly controls the motor electronic cooling unit to connect with the corresponding heating unit circuit. The heating unit is one of the cabin electric water heating unit, cabin electric cooling and heating air conditioning unit, and battery water cooling and water heating unit.

[0029] Specifically, the controller first collects multi-dimensional parameters uploaded by each unit, and then makes a comprehensive judgment based on the acquired multi-dimensional parameters and preset waste heat utilization switching conditions. When there is no waste heat utilization demand, the controller controls each unit to operate independently to avoid increasing cooling energy consumption and causing system instability. When there is a waste heat utilization demand, the controller directs the waste heat from the motor control system to the cabin heating, battery temperature control, or heat pump as needed to achieve efficient and coordinated utilization of the vehicle's heat.

[0030] As shown in the system implementation, the multi-dimensional parameters acquired by the controller in step S101 specifically include: the motor water pump operating status parameters (on or off) and the motor water outlet temperature and return water temperature uploaded by the motor electronic control cooling unit; the battery water pump operating status parameters, battery temperature control mode parameters (self-circulation mode, heating mode, or cooling mode), and battery inlet water temperature and return water temperature uploaded by the battery water cooling and heating unit; the warm air water pump operating status parameters, PTC heater working mode parameters, warm air inlet water temperature, and return water temperature uploaded by the cabin electric water heating unit; the air conditioning working mode parameters (cooling mode, heat pump heating mode, or off state) and heat pump return water temperature uploaded by the cabin electric cooling and heating air conditioning unit; and also the cabin temperature and ambient temperature. In addition to the above parameters, the controller also acquires the liquid level parameters uploaded by the expansion tank for real-time monitoring of the coolant level in each loop. The above multi-dimensional parameters constitute the complete input dataset for the controller to make loop switching judgments.

[0031] In step S102, the waste heat utilization switching conditions include at least the conditions for utilizing waste heat from heating, the conditions for utilizing waste heat from batteries, and the conditions for utilizing waste heat from heat pumps. The specific details of each waste heat utilization condition are as follows.

[0032] Conditions for utilizing waste heat from the heating system: The motor water pump of the motor-controlled cooling unit is on, the cabin electric water heating unit is in heating mode, the outlet water temperature of the motor-controlled cooling unit (motor-controlled outlet water temperature) is higher than the first preset temperature value, and the outlet water temperature is higher than the inlet water temperature of the cabin electric water heating unit. In this embodiment, the first preset temperature value is set to 0℃, but it can be adjusted according to the low-temperature tolerance of the motor-controlled components during actual operation.

[0033] Battery waste heat utilization conditions: The motor water pump of the motor-controlled cooling unit is on; the temperature control mode of the battery water-cooling and water-heating unit is in heating or cooling demand mode; the outlet water temperature of the motor-controlled cooling unit is higher than the second preset temperature value; and the difference between the outlet water temperature and the return water temperature of the battery water-cooling and water-heating unit meets the preset temperature difference threshold range. In this embodiment, the second preset temperature value is set to 40℃, but it can be adjusted according to the specifications of the radiator in the cabin and the need for anti-cold air blowing during actual operation.

[0034] Conditions for heat pump waste heat utilization: The motor water pump of the motor-controlled cooling unit is turned on; the heat pump of the cabin electric heating and cooling air conditioning unit is in heating mode; the outlet water temperature of the motor-controlled cooling unit is higher than a third preset temperature value; and the difference between the outlet water temperature and the return water temperature of the heat pump meets the preset heat pump temperature difference threshold. In this embodiment, the third preset temperature value is set to 45°C.

[0035] Therefore, after receiving the operating status parameters and temperature parameters uploaded by the aforementioned units, the controller sequentially determines whether the conditions for utilizing waste heat from heating, batteries, and heat pumps are met. Only when all parameters meet all the sub-conditions of any given condition is the current operating condition considered to be met, thus triggering the corresponding waste heat utilization mode. When only one of the three waste heat utilization conditions is met after item-by-item evaluation, the controller directly outputs the connection signal corresponding to that condition and designates the unit meeting the condition as the unit to be heated. When two or three conditions are met simultaneously, the controller selects the highest priority condition (heating waste heat utilization condition takes precedence over heat pump waste heat utilization condition, and heat pump waste heat utilization condition takes precedence over battery waste heat utilization condition) and outputs the corresponding connection signal. When none of the three conditions are met, the controller outputs an independent operating signal.

[0036] It should be noted that all three waste heat utilization conditions mentioned above are configured with hysteresis intervals. For example, when the temperature difference (motor outlet water temperature - heater inlet water temperature) in the heater waste heat utilization condition is within the preset hysteresis interval, even if the temperature difference briefly drops below the judgment threshold, the controller will maintain the currently output control signal unchanged. The mode switching action will only be executed after the temperature difference has continuously deviated from the hysteresis interval for a certain period of time or to a certain extent. This hysteresis mechanism effectively avoids frequent mode switching caused by sensor measurement noise, minor fluctuations in coolant temperature, or transient changes in operating conditions, ensuring the operational life of valve components and the stability of system operation.

[0037] In addition, the controller monitors the expansion tank's liquid level parameters in real time. When the liquid level falls below the preset minimum liquid level threshold, it triggers the water replenishment mode. In water replenishment mode, the controller outputs a water replenishment control signal to the valve assembly, controlling the six-way electrically controlled water valve to switch to the water replenishment position. This connects the first interface, the second interface, and the heat pump circuit interface of the three-way electrically controlled water valve. Simultaneously, it controls the motor water pump to start, replenishing the coolant in the expansion tank to each circuit. Once the liquid level rises back to the normal liquid level threshold, the controller exits the water replenishment mode and returns to the original operating mode. The water replenishment process can be performed during system startup self-test or triggered at any time during system operation based on liquid level monitoring results, ensuring sufficient coolant in each circuit and preventing cavitation or circulation interruption due to low liquid levels.

[0038] When the judgment result indicates that no waste heat utilization conditions are met, the controller outputs an independent operation signal to the valve assembly. Specifically, this independent operation signal controls the six-way electrically controlled water valve to connect the first and second interfaces, enabling the motor-controlled cooling unit to form an independent circulation loop; the third and fourth interfaces to connect the cabin electric water heating unit to form an independent circulation loop; and the fifth and sixth interfaces to connect the battery water cooling and heating unit to form an independent circulation loop. Simultaneously, it controls the three-way electrically controlled water valve to disconnect the heat pump circuit of the cabin electric heating and cooling air conditioning unit from the circuit of the motor-controlled cooling unit. At this time, the units are not connected to each other and operate independently, thereby avoiding increased cooling energy consumption or system instability due to improper connection during periods of insufficient waste heat or non-heating seasons. Under the condition of independent operation of each unit, the expansion tank remains connected to each circuit through U-shaped interfaces at the high points of each circuit, such as the U-shaped interface set on the fifth interface, to balance the pressure fluctuations of each circuit in real time and automatically replenish the coolant loss caused by minor leaks or venting.

[0039] When the judgment result meets the conditions for utilizing waste heat from the heating system, the controller outputs a first connection signal to the valve assembly. This first connection signal controls the six-way electrically controlled water valve to switch to the first operating position, connecting the first interface with the fourth interface and the second interface with the third interface, thereby connecting the motor-controlled cooling unit and the cabin electric water heating unit. Simultaneously, it controls the three-way electrically controlled water valve to switch to the bypass state, isolating the heat pump circuit of the cabin electric heating and cooling unit. At this time, the coolant carrying the waste heat from the motor-controlled system flows into the cabin electric water heating unit through the six-way electrically controlled water valve, releases heat into the cabin after flowing through the radiators and defrosters, and the cooled coolant then flows back to the motor-controlled cooling unit through the six-way electrically controlled water valve, forming a complete waste heat heating cycle.

[0040] When the judgment result meets the conditions for battery waste heat utilization, the controller outputs a second connection signal to the valve assembly. This second connection signal controls the six-way electrically controlled water valve to switch to the second working position, connecting the first and sixth interfaces, the second and fifth interfaces, and the third and fourth interfaces. This connects the motor control cooling unit and the battery water-cooling and heating unit, while the cabin electric water heating unit remains in its own loop. Simultaneously, the three-way electrically controlled water valve is switched to bypass mode to isolate the heat pump circuit. At this time, the coolant carrying the waste heat from the motor control system flows into the battery water-cooling and heating unit through the six-way electrically controlled water valve, transferring heat to the power battery to assist in heating or maintaining its temperature. The cooled coolant then flows back to the motor control cooling unit through the six-way electrically controlled water valve, forming a complete battery auxiliary heating cycle.

[0041] When the judgment result meets the conditions for heat pump waste heat utilization, the controller outputs a third connection signal to the valve assembly. This third connection signal controls the six-way electrically controlled water valve to switch to the third working position, connecting the first and second interfaces. Simultaneously, it controls the three-way electrically controlled water valve to switch to the conducting state, connecting the second interface to the heat pump circuit of the cabin electric heating and cooling unit. At the same time, the six-way electrically controlled water valve keeps the third and fourth interfaces connected, so that the cabin electric water heating unit forms its own circuit, while the fifth and sixth interfaces are connected, so that the battery water cooling and heating unit forms its own circuit. At this time, the coolant carrying the waste heat of the motor and electrical control system flows out through the first and second interfaces of the six-way electrically controlled water valve, and then flows into the first cold water plate heat exchanger in the heat pump circuit through the three-way electrically controlled water valve. The heat pump absorbs heat from the coolant through the plate heat exchanger, raises the temperature through the heat pump compression cycle, and then supplies heat to the cabin. The coolant, after releasing heat, flows back to the motor and electrical control cooling unit through the three-way and six-way electrically controlled water valves, forming a complete waste heat heat pump efficiency enhancement cycle.

[0042] When the controller determines that multiple waste heat utilization conditions are met at the same time, it will output only the connection signal corresponding to the highest priority condition, according to the priority order of the heating waste heat utilization condition taking precedence over the heat pump waste heat utilization condition, and the heat pump waste heat utilization condition taking precedence over the battery waste heat utilization condition. The other conditions will not be responded to at the moment.

[0043] Furthermore, during the maintenance of any of the above-mentioned waste heat utilization modes, the controller continuously monitors the relevant temperature parameters. When the exit condition corresponding to the current mode is met, the controller automatically exits the current mode and re-executes the judgment process of step S102. For example, if the current mode is in heating mode because the conditions for utilizing waste heat in the heating mode are met, and the outlet water temperature of the motor control is lower than the second preset temperature value or lower than the heating return water temperature in the heating mode, then the heating mode will automatically exit.

[0044] Meanwhile, regardless of the current waste heat utilization mode, once the controller detects that the motor control outlet temperature is higher than the safe temperature threshold (set to 55°C in this embodiment), the controller will unconditionally prioritize outputting an independent operation signal and controlling the three-way electrically controlled water valve to switch to the heat dissipation mode, forcing the motor control unit to enter the heat dissipation state, thus ensuring the safe operation of the motor control components.

[0045] Based on the above-defined waste heat utilization conditions and priority rules, the overall working logic of the controller can be summarized as follows: During the discharge operation of the new energy bus, when the motor and electronic control system have sufficient waste heat and the passenger cabin requires heating, priority is given to utilizing the waste heat from the heater. Secondly, battery waste heat utilization or heat pump waste heat utilization is used as needed, and the three-way electronically controlled water valve switches to bypass mode to ensure no heat loss. When there is no waste heat utilization requirement, each unit operates independently. During the charging operation of the new energy bus while parked, if the battery needs cooling and the ambient temperature is low, the external air-cooled radiator is used to replace the compressor of the passenger cabin air conditioning unit to reduce energy consumption; otherwise, each unit operates independently. When the passenger cabin temperature reaches the set value, the passenger cabin electric water heating unit automatically switches to low-temperature water mode, lowering the target water temperature of the PTC heater, thereby increasing the proportion of waste heat from the motor and electronic control system participating in heating. When the outlet water temperature of the motor and electronic control system exceeds the safety threshold, the controller unconditionally switches to independent operation and activates the ATS cooling system to prioritize the safety of all system components. The above strategies work together to achieve a balance between efficient utilization of vehicle heat and safe system operation.

[0046] It should be noted that the sequence numbers of the steps in the above embodiments do not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application. In practical applications, all the above possible implementation methods can be arbitrarily combined in a combined manner to form possible embodiments of this application, which will not be described in detail here.

[0047] Based on the same inventive concept, this application also provides an electronic device, including a processor and a memory, wherein the memory stores a computer program, and the processor is configured to run the computer program to execute a control method for thermal management of a new energy bus according to any of the above embodiments.

[0048] In an exemplary embodiment, an electronic device is provided, such as Figure 4 As shown, Figure 4 The illustrated electronic device includes a processor and a memory. The processor and memory are connected, for example, via a bus. Optionally, the electronic device may also include a transceiver, which integrates software programs or hardware such as applications, application programming interfaces (APIs), middleware, and kernels. It should be noted that in practical applications, the transceiver is not limited to one unit, and the structure of this electronic device does not constitute a limitation on the embodiments of this application.

[0049] The processor can be a CPU (Central Processing Unit), a DSP (Digital Signal Processor), an ASIC (Application Specific Integrated Circuit), an FPGA (Field Programmable Gate Array), or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. It can implement or execute the various exemplary logic blocks, modules, and circuits described in conjunction with the disclosure of this application. The processor can also be a combination that implements computational functions, such as a combination of one or more microprocessors, a combination of a DSP and a microprocessor, etc.

[0050] A bus can include a pathway for transmitting information between the aforementioned components or connecting these devices to hardware such as input / output interfaces, display devices, and communication interfaces. The bus can be a PCI (Peripheral Component Interconnect) bus or an EISA (Extended Industry Standard Architecture) bus, etc. Buses can be categorized as address buses, data buses, control buses, etc. For ease of representation, Figure 4 The bus is represented by a single thick line, but this does not mean that there is only one bus or one type of bus.

[0051] The memory may be ROM (Read Only Memory) or other types of static storage devices capable of storing static information and instructions, RAM (Random Access Memory) or other types of dynamic storage devices capable of storing information and instructions, or EEPROM (Electrically Erasable Programmable Read Only Memory), CD-ROM (Compact Disc Read Only Memory) or other optical disc storage, optical disc storage (including compressed optical discs, laser discs, optical discs, digital universal optical discs, Blu-ray discs, etc.), magnetic disk storage media or other magnetic storage devices, or any other medium capable of carrying or storing desired program code in the form of instructions or data structures and accessible by a computer, but not limited to these.

[0052] The memory stores computer program code that executes the scheme of this application, and its execution is controlled by a processor. The processor executes the computer program code stored in the memory to implement the content shown in the foregoing method embodiments.

[0053] Among them, electronic devices include, but are not limited to: mobile terminals such as mobile phones, laptops, digital radio receivers, PDAs (personal digital assistants), PADs (tablet computers), PMPs (portable multimedia players), and in-vehicle terminals (such as in-vehicle navigation terminals), as well as fixed terminals such as digital TVs and desktop computers. Figure 4 The electronic device shown is merely an example and should not impose any limitation on the functionality and scope of use of the embodiments of this application.

[0054] Based on the same inventive concept, this application also provides a storage medium storing a computer program, wherein the computer program is configured to execute a control method for thermal management of a new energy bus according to any of the above embodiments when running.

[0055] Those skilled in the art will clearly understand that the specific working process of the systems, devices, and modules described above can be referred to the corresponding process in the foregoing method embodiments. For the sake of brevity, it will not be repeated here.

[0056] Those skilled in the art will understand that the technical solution of this application, or all or part of it, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several program instructions to cause an electronic device (e.g., a personal computer, server, or network device) to execute all or part of the steps of the methods described in the embodiments of this application when running the program instructions. The aforementioned storage medium includes various media capable of storing program code, such as a USB flash drive, portable hard drive, read-only memory (ROM), random access memory (RAM), magnetic disk, or optical disk.

[0057] Alternatively, all or part of the steps of the foregoing method embodiments can be implemented by hardware (such as electronic devices like personal computers, servers, or network devices) associated with program instructions. The program instructions can be stored in a computer-readable storage medium. When the program instructions are executed by the processor of the electronic device, the electronic device executes all or part of the steps of the methods described in the embodiments of this application.

[0058] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit it. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that within the spirit and principles of this application, modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein; and these modifications or substitutions do not cause the corresponding technical solutions to leave the protection scope of this application.

Claims

1. A control system for the thermal management of a new energy bus, comprising a motor and electronic control cooling unit, a battery water-cooling and water-heating unit, a passenger cabin electric water-heating unit, and a passenger cabin electric cooling and heating air conditioning unit, characterized in that, It also includes an energy management unit; The energy management unit includes fluid piping, valve assemblies, and a controller; The fluid pipelines are respectively connected to the motor electronic control cooling unit, the battery water cooling and heating unit, the cabin electric water heating unit, and the cabin electric cooling and heating air conditioning unit; The valve assembly is disposed on the fluid pipeline; The controller is used to receive the operating status parameters and temperature parameters uploaded by each unit, and output control signals according to the acquired parameters to control the valve assembly to switch the connection state of the fluid pipeline, thereby realizing heat transfer or isolation between the units.

2. The control system for thermal management of a new energy bus according to claim 1, characterized in that, The valve assembly includes a six-way electrically controlled water valve and a three-way electrically controlled water valve; The first port of the six-way electrically controlled water valve is connected to the outlet pipe of the motor electrically controlled cooling unit. The second port is connected to the return water pipe of the motor electrically controlled cooling unit and the heat pump circuit of the cabin electric heating and cooling air conditioning unit through the three-way electrically controlled water valve. The third and fourth ports are connected to the outlet pipe and return water pipe of the cabin electric water heating unit, respectively. The fifth and sixth ports are connected to the outlet pipe and return water pipe of the battery water cooling and water heating unit, respectively.

3. The control system for thermal management of a new energy bus according to claim 1, characterized in that, Water temperature sensors are installed on the outlet and return water pipes of the motor electronic control cooling unit, the outlet and return water pipes of the battery water cooling and heating unit, the outlet and return water pipes of the cabin electric water heating unit, and the heat pump circuit of the cabin electric cooling and heating air conditioning unit. The cabin electric water heating unit is also equipped with a temperature sensor to collect the cabin temperature. The cabin electric heating and cooling air conditioning unit is also equipped with a temperature sensor to collect the temperature inside and outside the cabin; Each of the water temperature sensor and air temperature sensor is electrically connected to the controller and is used to upload temperature parameters to the controller.

4. A control method for thermal management of a new energy bus, applied to the control system as described in any one of claims 1-3, characterized in that, include: The controller receives the operating status parameters and temperature parameters uploaded by each unit, and determines whether the current operating condition meets the preset waste heat utilization switching conditions based on the received parameters. The waste heat utilization switching conditions include at least the heating waste heat utilization conditions, battery waste heat utilization conditions and heat pump waste heat utilization conditions. When any of the waste heat utilization switching conditions are not met, the controller outputs an independent operation signal to the valve assembly, and the valve assembly controls the motor electronic cooling unit, battery water cooling and water heating unit, cabin electric water heating unit and cabin electric cooling and heating air conditioning unit to form independent circulation loops. When one of the waste heat utilization switching conditions is met, the controller outputs a connection signal corresponding to the switching condition to the valve assembly, and the valve assembly controls the motor electronic cooling unit to connect with the corresponding unit to be heated. The unit to be heated is one of the cabin electric water heating unit, the cabin electric cooling and heating air conditioning unit, and the battery water cooling and water heating unit.

5. The control method for thermal management of a new energy bus according to claim 4, characterized in that, The independent operating signal is used to control the six-way electrically controlled water valve to connect the first interface with the second interface, the third interface with the fourth interface, and the fifth interface with the sixth interface, and to control the three-way electrically controlled water valve to form an independent circulation loop for the heat pump circuit of the cabin electric heating and cooling air conditioning unit.

6. The control method for thermal management of a new energy bus according to claim 4, characterized in that, When the controller determines that any of the waste heat utilization switching conditions are met, the connection signal is specifically used for: The six-way electrically controlled water valve is switched to the corresponding working position, so that the motor electrically controlled cooling unit can selectively connect to one of the cabin electric water heating unit, the battery water cooling and water heating unit, and the cabin electric cooling and heating air conditioning unit; at the same time, the three-way electrically controlled water valve is switched to the bypass state so that the heat pump circuit of the cabin electric cooling and heating air conditioning unit forms an independent circulation circuit, or the three-way electrically controlled water valve is switched to the conduction state so that the heat pump circuit of the cabin electric cooling and heating air conditioning unit is connected to the motor electrically controlled cooling unit.

7. The control method for thermal management of a new energy bus according to claim 6, characterized in that, The conditions for utilizing the waste heat from the heating system are as follows: the motor water pump of the motor-controlled cooling unit is in the on state, the cabin electric water heating unit is in the heating mode, the outlet water temperature of the motor-controlled cooling unit is higher than the first preset temperature value, and the outlet water temperature is higher than the inlet water temperature of the cabin electric water heating unit. When the conditions for utilizing the waste heat of the heating system are met, the controller outputs a first connection signal to control the six-way electrically controlled water valve to connect the motor-controlled cooling unit with the cabin electric water heating unit, and at the same time controls the three-way electrically controlled water valve to switch to bypass mode.

8. The control method for thermal management of a new energy bus according to claim 6, characterized in that, The conditions for utilizing the waste heat of the battery are as follows: the motor water pump of the motor control cooling unit is in the on state; the temperature control mode of the battery water cooling and heating unit is in the heating or cooling demand state; the outlet water temperature of the motor control cooling unit is higher than the second preset temperature value; and the difference between the outlet water temperature and the return water temperature of the battery water cooling and heating unit meets the preset temperature difference threshold range. When the battery waste heat utilization conditions are met, the controller outputs a second connection signal to control the six-way electrically controlled water valve to connect the motor electrically controlled cooling unit with the battery water cooling and heating unit, and controls the three-way electrically controlled water valve to switch to bypass state.

9. The control method for thermal management of a new energy bus according to claim 6, characterized in that, The conditions for utilizing the waste heat of the heat pump are as follows: the motor water pump of the motor-controlled cooling unit is in the on state, the heat pump of the cabin electric heating and cooling air conditioning unit is in the heating mode, the outlet water temperature of the motor-controlled cooling unit is higher than the third preset temperature value, and the difference between the outlet water temperature and the return water temperature of the heat pump meets the preset heat pump temperature difference threshold. When the heat pump waste heat utilization conditions are met, the controller outputs a third connection signal to control the six-way electrically controlled water valve to connect the motor electrically controlled cooling unit to the cabin electric heating and cooling air conditioning unit via the three-way electrically controlled water valve, and controls the three-way electrically controlled water valve to switch to the conducting state.

10. The control method for thermal management of a new energy bus according to claim 4, characterized in that, When the controller simultaneously determines that multiple waste heat utilization switching conditions are met, it outputs the corresponding connection signal in the priority order of the heating waste heat utilization condition, the heat pump waste heat utilization condition, and the battery waste heat utilization condition.

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