CN112158047A - Control method of whole vehicle thermal management system, vehicle and storage medium - Google Patents
Control method of whole vehicle thermal management system, vehicle and storage medium Download PDFInfo
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- CN112158047A CN112158047A CN202011027785.3A CN202011027785A CN112158047A CN 112158047 A CN112158047 A CN 112158047A CN 202011027785 A CN202011027785 A CN 202011027785A CN 112158047 A CN112158047 A CN 112158047A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00271—HVAC devices specially adapted for particular vehicle parts or components and being connected to the vehicle HVAC unit
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00271—HVAC devices specially adapted for particular vehicle parts or components and being connected to the vehicle HVAC unit
- B60H1/00278—HVAC devices specially adapted for particular vehicle parts or components and being connected to the vehicle HVAC unit for the battery
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
- B60H1/00735—Control systems or circuits characterised by their input, i.e. by the detection, measurement or calculation of particular conditions, e.g. signal treatment, dynamic models
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
- B60H1/00814—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation
- B60H1/00878—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation the components being temperature regulating devices
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00271—HVAC devices specially adapted for particular vehicle parts or components and being connected to the vehicle HVAC unit
- B60H2001/00307—Component temperature regulation using a liquid flow
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- Mechanical Engineering (AREA)
- Air-Conditioning For Vehicles (AREA)
Abstract
The embodiment of the invention provides a control method of a finished automobile thermal management system, a vehicle and a storage medium, wherein the control method of the finished automobile thermal management system comprises the following steps: determining a requirement threshold value of thermal management operation matched with the working state based on the acquired working state of the whole vehicle; generating requirement information of the whole vehicle heat management system according to the collected working condition parameters of the whole vehicle heat management system and the corresponding relation between the working condition parameters and the requirement threshold; generating control information according to the integration relation and the demand information of the plurality of heat exchange loops; and configuring the operation state of the refrigerant adjusting device according to the control information. Through the technical scheme of the invention, the coordinated control of a plurality of heat exchange loops in the whole vehicle heat management system is realized, so that the error control mode and switching mode of the whole vehicle heat management system are prevented, and the running safety of the whole vehicle heat management system is further improved.
Description
Technical Field
The invention relates to the technical field of automobiles, in particular to a control method of a whole automobile thermal management system, a vehicle and a computer readable storage medium.
Background
The automobile is provided with a heat management system, the heat management system is controlled to execute heat management operation, so that the temperature of heating devices such as an engine and the like in the automobile and the temperature of a cab in the automobile are maintained in a proper temperature range, the heat exchange loops in the heat management system gradually develop towards complexity and integration, and refrigerants in the heat exchange loops such as an air conditioning loop and a battery heat exchange loop can be crossed in other loops so as to realize mixed linkage of a plurality of heat exchange loops.
Therefore, if the heat management system with the plurality of heat exchange loops in hybrid linkage operates according to the mode that each existing heat exchange loop is controlled relatively independently, each heat exchange loop cannot be coordinated and controlled in the operation process, error control and switching of energy management of the whole vehicle are easily caused, and the operation safety of the whole vehicle is further influenced.
Disclosure of Invention
The technical problem to be solved by the embodiment of the invention is to provide a control method of a whole vehicle thermal management system, so as to prevent the whole vehicle thermal management system from generating an error control mode and a switching mode through the coordinated control of a plurality of heat exchange loops in the whole vehicle thermal management system.
Correspondingly, the embodiment of the invention also provides a vehicle and a storage medium, which are used for ensuring the implementation and the application of the method.
In order to solve the above problem, an embodiment of a first aspect of the present invention discloses a control method for a vehicle thermal management system, including:
determining a requirement threshold value of the thermal management operation matched with the working state based on the acquired working state of the whole vehicle;
generating requirement information of the whole vehicle thermal management system according to the collected working condition parameters of the whole vehicle thermal management system and the corresponding relation between the working condition parameters and the requirement threshold;
generating control information according to the integration relation of the plurality of heat exchange loops and the demand information;
and configuring the running state of the refrigerant adjusting device according to the control information.
Optionally, the generating control information according to the integration relationship of the plurality of heat exchange loops and the demand information includes:
determining the operating state of the refrigerant adjusting device to be configured according to the demand information and the integration relation;
judging whether the running state to be configured has an interference phenomenon in a plurality of simultaneous thermal management operations;
under the condition that the interference phenomenon exists, adjusting the running state to be configured according to a preset adjusting mode to eliminate the interference phenomenon;
and updating the demand information according to the adjusted running state so as to regenerate the control information.
Optionally, the adjusting, when the interference phenomenon exists, the operating state to be configured according to a preset adjustment manner to eliminate the interference phenomenon includes:
determining a plurality of thermal management operations corresponding to a plurality of running states to be configured as requirements to be adjusted under the condition that the interference phenomenon exists;
calculating the difference between the working condition parameter in the demand to be adjusted and the corresponding demand threshold;
and determining the requirement to be adjusted with the largest difference value as the thermal management operation to be executed, and canceling other thermal management operations in the requirement to be adjusted so as to eliminate the interference phenomenon.
Optionally, the adjusting, when the interference phenomenon exists, the operating state to be configured according to a preset adjustment manner to eliminate the interference phenomenon includes:
determining the execution priority of various thermal management operations corresponding to a plurality of running states to be configured respectively under the condition that the interference phenomenon exists;
and sequentially configuring the refrigerant adjusting devices to the corresponding operating states according to the execution priority so as to eliminate the interference phenomenon.
Optionally, the generating control information according to the integration relationship of the plurality of heat exchange loops and the demand information further includes:
under the condition that the integration relation comprises that at least one refrigerant adjusting device is controlled by an independent controller, sending a configuration instruction of the at least one refrigerant adjusting device to the independent controller according to the requirement information;
receiving a feedback signal fed back by the independent controller according to the configuration instruction;
if the feedback signal is an enabling signal, determining the corresponding demand information as the control information;
and if the feedback signal is a non-enabling signal, deleting the corresponding requirement information.
Optionally, the control method further includes:
under the condition that the working state of the whole vehicle is changed, the working condition parameters and/or the requirement threshold are/is updated according to the changed working state, so that the updated requirement information is obtained according to the updated working condition parameters and/or the requirement threshold;
and regenerating the control information according to the updated demand information.
Optionally, the determining a requirement threshold of the thermal management operation matched with the operating state includes:
determining the temperature and humidity regulation requirement of the heat exchange loop matched with the working state;
determining a heating demand threshold and/or a cooling demand threshold for executing the temperature and humidity regulation demand in the working state;
determining the heating demand threshold and/or the cooling demand threshold as the demand threshold.
Optionally, the generating of the requirement information of the complete vehicle thermal management system according to the collected operating condition parameters of the complete vehicle thermal management system and the correspondence between the operating condition parameters and the requirement thresholds includes:
respectively collecting working condition parameters of each heat exchange loop;
determining a cooling demand as a thermal management operation of the heat exchange loop under the condition that the working condition parameter is greater than a cooling demand threshold of the heat exchange loop;
determining the heating requirement as the heat management operation of the heat exchange loop under the condition that the working condition parameter is smaller than the heating requirement threshold of the heat exchange loop;
generating corresponding requirement information according to the thermal management operation,
the heat exchange loop comprises at least one of an air conditioner loop, a power system heat exchange loop and a battery heat exchange loop.
Optionally, before determining the requirement threshold of the thermal management operation, which is matched with the operating state, based on the acquired operating state of the entire vehicle, the method further includes:
detecting the charge-discharge state of a battery of the whole vehicle;
under the condition that the working state of the whole vehicle is a discharging state, determining that the working state of the whole vehicle is a running state;
and under the condition that the working state of the whole vehicle is a charging state, acquiring the charging power of the battery, and determining whether the charging state is a fast charging state or a slow charging state according to the charging power.
Optionally, the refrigerant adjusting device includes at least one of a control valve, a pump body, a fan, a compressor, and an expansion valve.
An embodiment of a second aspect of the invention discloses a vehicle, comprising: the method comprises the steps of storing instructions capable of being executed by the vehicle controller, and storing the instructions in a memory, so that the vehicle controller can execute the steps of the control method of the vehicle thermal management system according to any one of the embodiments of the second aspect of the invention.
The embodiment of the third aspect of the invention discloses a computer-readable medium, which stores computer-executable instructions, and is characterized in that the computer-executable instructions are used for executing the control method of the whole vehicle thermal management system in any one of the embodiments of the first aspect of the invention.
The whole vehicle heat management system in the embodiment of the invention comprises a plurality of heat exchange loops, wherein at least parts of the heat exchange loops are mutually communicated, namely, a refrigerant can flow into different heat exchange loops under the control of different refrigerant adjusting devices so as to realize refrigerant mixed flow.
After the demand information is obtained, the heat management operation which can be completed by the whole vehicle heat management system is obtained according to the integration relation among the heat exchange loops, so that the coordination control of the heat exchange loops is realized, the control information is generated according to the heat management operation which can be completed, the refrigerant adjusting device is controlled to operate according to the control information, the wrong control mode and switching mode of the whole vehicle heat management system can be prevented, and the running safety of the whole vehicle is improved under the condition of improving the utilization efficiency of the refrigerant.
Drawings
FIG. 1 is a flowchart illustrating steps of an embodiment of a method for controlling a vehicle thermal management system according to the present invention;
FIG. 2 is a flowchart illustrating steps of another exemplary embodiment of a method for controlling a vehicle thermal management system according to the present invention;
FIG. 3 is a flowchart illustrating steps of another embodiment of a method for controlling a vehicle thermal management system according to the present invention;
FIG. 4 is a flowchart illustrating steps of another exemplary embodiment of a method for controlling a vehicle thermal management system according to the present invention;
FIG. 5 is a flowchart illustrating steps of another exemplary embodiment of a method for controlling a vehicle thermal management system according to the present invention;
FIG. 6 is a schematic diagram of a heat exchange loop of another overall vehicle thermal management system of the present invention;
FIG. 7 is a flowchart illustrating a control method of another embodiment of the finished vehicle thermal management system according to the present invention;
fig. 8 is a block diagram of a vehicle embodiment of the invention.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
So that the manner in which the above recited objects, features and advantages of the present invention can be understood in detail, a more particular description of the invention, briefly summarized above, may be had by reference to the embodiments thereof which are illustrated in the appended drawings. It should be noted that the embodiments of the present invention and features of the embodiments may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.
Referring to fig. 1, a flowchart illustrating steps of an embodiment of a control method of a vehicle thermal management system according to the present invention is shown, which may specifically include the following steps:
and S102, determining a requirement threshold value of the thermal management operation matched with the working state based on the obtained working state of the whole vehicle.
The corresponding heat requirements of the whole vehicle are different when the whole vehicle runs in different working states, and the heat management operation required to be executed by the whole vehicle heat management system is different, so that the corresponding requirement threshold can be read when the running state is identified by presetting the corresponding requirement threshold according to different working states, and the heat management operation of the whole vehicle heat management system can be determined according to the requirement threshold.
Specifically, the operating state includes, but is not limited to, a driving state, a fast charging state, a slow charging state, and the like, such as in the driving state and the fast charging state, a threshold value required to perform a battery cooling operation is different, and thus corresponding control logic is also different.
Additionally, thermal management operations include, but are not limited to: an air-conditioning cooling operation, an air-conditioning heating operation, an in-vehicle air dehumidifying (defogging) operation, a power device (driving motor, compressor, transmission, intercooler, on-vehicle charger, voltage converter, power distributor, etc.) cooling operation, a battery heating operation, and a battery cooling operation, etc.
Demand thresholds include, but are not limited to: a battery heating demand threshold, a battery cooling demand threshold, a motor cooling threshold, a compressor cooling demand threshold, and the like.
Those skilled in the art will also appreciate that the demand threshold may include, but is not limited to, temperature thresholds of the power device and the coolant and pressure thresholds in the circuit.
And step S104, generating requirement information of the whole vehicle heat management system according to the collected working condition parameters of the whole vehicle heat management system and the corresponding relation between the working condition parameters and the requirement threshold.
The requirement information of the whole vehicle heat management system is obtained according to the relation between the detected working condition parameters and the corresponding requirement thresholds, so that the whole vehicle heat management operation is accurately planned, the heat management operation matched with the current working state is further realized, and the safe operation of the whole vehicle is ensured.
Specifically, the requirement information may be represented in a requirement code, and the requirement information includes but is not limited to: air conditioner cooling demand, air conditioner heating demand, in-vehicle air dehumidification (defogging) demand, power device (driving motor, compressor, transmission, intercooler, on-board charger, voltage converter, power distributor, etc.) cooling demand, battery heating demand, battery cooling demand, and the like.
And S106, generating control information according to the integration relation and the demand information of the plurality of heat exchange loops.
In any working state of the vehicle, multiple kinds of demand information may exist simultaneously, for example, in a driving state of the vehicle, the vehicle may have a cabin heating demand, a battery heating demand, a motor cooling demand, and the like, and based on an integration relation among multiple heat exchange loops, interference may exist between heat management operations corresponding to the demand information, for example, when the heat pump operates, the temperature of a refrigerant in the heat exchange loops is low, and heating of the battery cannot be achieved.
In order to prevent interference between thermal management operations from influencing normal operation of the thermal management system, an interference elimination mode is determined according to the integration relation, and the requirement information is updated based on the interference elimination mode to obtain control information so as to ensure normal operation of the thermal management system.
And step S108, configuring the operation state of the refrigerant adjusting device according to the control information.
The refrigerant adjusting device comprises at least one of a control valve, a pump body, a fan, a compressor, an active air inlet grille and an expansion valve.
The operation state of the refrigerant adjusting device is controlled based on the obtained control information, so that the temperature of the refrigerant in the heat exchange loop can reach a required temperature threshold, and the refrigerant reaching the temperature threshold is reserved in the specified heat exchange loop according to a required flow direction, so that the mixed flow of the refrigerant among the plurality of integrated heat exchange loops is realized.
In the embodiment, at least parts of the plurality of heat exchange loops in the finished automobile heat management system are communicated with each other, that is, the refrigerant can flow into different heat exchange loops under the control of different refrigerant adjusting devices to realize refrigerant mixing, in the finished automobile heat management system, whether the heat management operation corresponding to the demand threshold is executed or not is determined by determining the demand threshold matched with the working state of the finished automobile when the heat management operation is required to be executed according to the relation between the collected working condition parameters of the finished automobile heat management system and the corresponding demand threshold in the working state, and then the demand information of the heat management system meeting the working state is obtained.
After the demand information is obtained, the heat management operation which can be completed by the whole vehicle heat management system is obtained according to the integration relation among the heat exchange loops, the heat exchange loops are coordinately controlled, control information is generated according to the heat management operation which can be completed, the refrigerant adjusting device is controlled to operate according to the control information, the wrong control mode and the wrong switching mode of the whole vehicle heat management system can be prevented, and the running safety of the whole vehicle is improved under the condition that the utilization efficiency of the refrigerant is improved.
Referring to fig. 2, a flowchart illustrating steps of an embodiment of a control method of a vehicle thermal management system according to the present invention is shown, which may specifically include the following steps:
step S202, based on the obtained working state of the whole vehicle, determining a requirement threshold value of the thermal management operation matched with the working state.
And S204, generating requirement information of the whole vehicle thermal management system according to the collected working condition parameters of the whole vehicle thermal management system and the corresponding relation between the working condition parameters and the requirement threshold.
In this embodiment, for specific implementation processes of step S202 and step S204, reference may be made to relevant descriptions in the embodiment shown in fig. 1, and details are not described here again.
And step S206, determining the running state of the refrigerant adjusting device to be configured according to the demand information and the integration relation.
The operation states of the refrigerant adjusting devices for valves comprise an opening state and a closing state, and in the opening state, the refrigerant adjusting devices further comprise an opening degree state, an opening angle state and the like.
For power-type refrigerant adjusting devices, such as a water pump, a fan, a compressor, and the like, the operation state may specifically refer to operation power.
And step S208, judging whether the running state to be configured has an interference phenomenon in a plurality of simultaneous thermal management operations.
The method includes the steps of judging whether an interference phenomenon exists in a plurality of kinds of thermal management operations existing at the same time in an operation state to be configured, for example, a first kind of thermal management operation and a second kind of thermal management operation need to be executed at the same time, wherein a control valve A in the first kind of thermal management operation needs to be configured in a closed state, and a control valve A in the second kind of thermal management operation needs to be configured in an open state.
Step S210, in the case of interference, adjusting the operating state to be configured according to a preset adjustment mode to eliminate the interference.
Step S212, updating the demand information according to the adjusted operation state to regenerate the control information.
Step S212 specifically includes: under the condition that the working state of the whole vehicle is changed, the working condition parameters and/or the requirement threshold are/is updated according to the changed working state, so that the updated requirement information is obtained according to the updated working condition parameters and/or the requirement threshold;
and regenerating the control information according to the updated demand information.
The operating state to be configured is adjusted according to a preset adjusting mode to eliminate interference phenomenon, so that the working state is changed, the working condition parameters and/or the requirement threshold are updated due to the change of the working state, the requirement information is regenerated according to the updated working condition parameters and/or the requirement threshold, the control information is regenerated according to the regenerated requirement, and the operation reliability of the heat management system is guaranteed.
And step S214, configuring the operation state of the refrigerant adjusting device according to the control information.
In this embodiment, by setting a preset adjustment mode, the starting conditions and priorities of the demands can be comprehensively considered, which demands can be started and which demands need to be prohibited are determined, and the execution of the thermal management operation corresponding to at least part of the demand information is realized, so that the safe and reliable operation of the whole thermal management system is ensured.
In some embodiments, in the presence of an interference phenomenon, the operating state to be configured is adjusted according to a preset adjustment manner to eliminate the interference phenomenon, which may be implemented as follows:
one possible way is to: determining a plurality of thermal management operations corresponding to a plurality of running states to be configured as requirements to be adjusted under the condition that an interference phenomenon exists; calculating a difference value between a working condition parameter in the demand to be adjusted and a corresponding demand threshold value; and determining the requirement to be adjusted with the largest difference as the thermal management operation to be executed, and canceling other thermal management operations in the requirement to be adjusted so as to eliminate the interference phenomenon.
In the embodiment, the difference between the actual working condition temperature and the requirement threshold is detected to judge the execution priority of the corresponding thermal management operation according to the difference, the higher the difference is, the higher the priority is, so that the refrigerant adjusting device is controlled to execute the demand to be adjusted with the highest priority, and the demand to be adjusted with the low execution priority is cancelled, so that the interference phenomenon is eliminated.
Another possible way is: determining the execution priority of various thermal management operations corresponding to a plurality of running states to be configured respectively under the condition that an interference phenomenon exists; and sequentially configuring the refrigerant adjusting devices to corresponding operating states according to the execution priority so as to eliminate the interference phenomenon.
In the embodiment, when a plurality of thermal management operations need to be executed simultaneously, the priority of each thermal management operation is preset to control the refrigerant adjusting device to execute in sequence according to the sequence from high to low, so that the normal operation of the thermal management system is ensured, a plurality of thermal management requirements can be met, and the vehicle can be in a more stable and safe working state.
Referring to fig. 3, a flowchart illustrating steps of an embodiment of a control method of a vehicle thermal management system according to the present invention is shown, which may specifically include the following steps:
step S302, determining a requirement threshold value of the thermal management operation matched with the working state based on the obtained working state of the whole vehicle.
And step S304, generating requirement information of the whole vehicle thermal management system according to the collected working condition parameters of the whole vehicle thermal management system and the corresponding relation between the working condition parameters and the requirement threshold.
And S306, determining the running state of the refrigerant adjusting device to be configured according to the demand information and the integration relation.
Step S308, judging whether the running state to be configured has interference phenomenon in a plurality of thermal management operations existing at the same time.
Step S310, under the condition that the interference phenomenon exists, the running state to be configured is adjusted according to a preset adjusting mode so as to eliminate the interference phenomenon.
Step S312, updating the demand information according to the adjusted operating state to regenerate the first control information.
Step S314, sending a configuration instruction of the at least one refrigerant adjusting device to the independent controller according to the demand information under the condition that the integration relationship includes that the at least one refrigerant adjusting device is controlled by the independent controller.
And step S316, receiving a feedback signal fed back by the independent controller according to the configuration instruction.
In step S318, if the feedback signal is an enable signal, the corresponding demand information is determined as the second control information.
In step S320, if the feedback signal is a non-enable signal, the corresponding requirement information is deleted to regenerate the second control information.
If part of the refrigerant adjusting devices and the heat management operation executed by the refrigerant adjusting devices are controlled by a non-vehicle controller, namely controlled by an independent controller, a feedback signal sent by the independent controller is obtained through communication interaction between the vehicle controller and the independent controller, and whether the refrigerant adjusting devices controlled by the independent controller can be added into the vehicle control or not is determined according to the feedback signal so as to reduce the probability of system operation abnormity.
In step S322, the operation state of the refrigerant adjusting device is configured according to the first control information and the second control information.
In the embodiment, the vehicle controller is required to send a state and demand request to the independent controller and the non-automatic control accessory, when the independent controller feeds back the demand enable and the accessory state conforms to the demand, the demand information is kept, since the logic determination of all controllers is not necessarily consistent, if the feedback of the independent controller is not enabled or the status of the individual accessories is contrary to the requirement, the requirement information is updated according to the heat pipe requirements of the whole vehicle and the status of each requirement enabling item and accessory, the actual control information is obtained, the various requirements of the whole vehicle are checked one by one through the code form, can ensure that no omission or missing of function requirements exists, individual function codes can never occur in the real vehicle working condition, which leads to strategy redundancy, but the dead cycle can not be entered due to identification omission in the strategy execution process, and the safe operation of the whole vehicle is ensured.
In some embodiments, when the working state of the entire vehicle changes, the demand information is updated according to the changed working state, so as to regenerate the control information according to the updated demand information.
In the embodiment, the working condition of the whole vehicle is an unsteady working condition, and the state and the environment of the whole vehicle are constantly changed and updated, so that the state of the whole vehicle is switched at any time, the heat management requirement is constantly updated, and then the generated code is updated to implement the function mode switching of the whole vehicle.
Referring to fig. 4, a flowchart illustrating steps of an embodiment of a control method of a vehicle thermal management system according to the present invention is shown, which may specifically include the following steps:
and S402, acquiring the working state of the whole vehicle.
And S404, determining the temperature and humidity regulation requirement of the heat exchange loop matched with the working state.
Step S406, determining a heating demand threshold and/or a cooling demand threshold for performing a temperature and humidity adjustment demand in an operating state.
In step S408, a heating demand threshold and/or a cooling demand threshold is determined as the demand threshold.
Step S410, generating requirement information of the whole vehicle thermal management system according to the collected working condition parameters of the whole vehicle thermal management system and the corresponding relation between the working condition parameters and the requirement threshold.
Step S412, generating control information according to the integration relation and the demand information of the plurality of heat exchange loops.
And step S414, configuring the operation state of the refrigerant adjusting device according to the control information.
In this embodiment, for specific implementation processes of step S410 to step S414, refer to relevant descriptions in the embodiments shown in fig. 1 to fig. 3, which are not described herein again.
In this embodiment, after the working state of the entire vehicle is detected, the thermal management requirement that needs to be matched with the working state, that is, the temperature and humidity regulation requirement of the heat exchange loop, is determined, and the heating requirement threshold and/or the cooling requirement threshold that executes the regulation requirement in the working state is further determined based on the temperature and humidity regulation requirement, and is used as the requirement threshold, and the execution time of the corresponding thermal management operation is determined according to the requirement threshold, so as to be more favorable for ensuring the reasonable distribution of the refrigerant in the heat exchange loop.
Referring to fig. 5, a flowchart illustrating steps of an embodiment of a control method of a vehicle thermal management system according to the present invention is shown, which may specifically include the following steps:
step S502, determining a requirement threshold value of the thermal management operation matched with the working state based on the obtained working state of the whole vehicle.
And step S504, respectively collecting working condition parameters of each heat exchange loop.
Step S506, under the condition that the working condition parameter is larger than the cooling requirement threshold value of the heat exchange loop, determining the cooling requirement as the heat management operation of the heat exchange loop.
For example, if the temperature of the battery is too high, the cooling demand of the battery needs to be taken as a thermal management operation, and if the temperature of high-voltage devices such as a motor, a compressor, and the like is too high, the cooling demand of the high-voltage devices needs to be taken as a thermal management operation.
Step S508, in a case that the operating condition parameter is smaller than the heating demand threshold of the heat exchange loop, determining the heating demand as the heat management operation of the heat exchange loop.
For example, if the temperature of the cabin is too low, the heating requirement of the cabin needs to be determined as a thermal management operation of the heat exchange circuit.
Step S510, generating corresponding demand information according to the thermal management operation, where the heat exchange loop includes at least one of an air conditioning loop, a power system heat exchange loop, and a battery heat exchange loop.
And S512, generating control information according to the integration relation and the demand information of the plurality of heat exchange loops.
And step S514, configuring the operation state of the refrigerant adjusting device according to the control information.
In the embodiment, the heat management operation and the working state of the heat management system are adapted by accurately determining the heating requirement and the cooling requirement of the heat exchange loop, so that the safe operation of the vehicle is ensured.
In some embodiments, the step S402 may be: detecting the charge-discharge state of a battery of the whole vehicle; determining the working state of the whole vehicle as a running state under the condition that the working state of the whole vehicle is a discharging state; and under the condition that the working state of the whole vehicle is a charging state, acquiring the charging power of the battery, and determining whether the charging state is a fast charging state or a slow charging state according to the charging power.
Fig. 6 shows a schematic diagram of a heat exchange loop of a complete vehicle thermal management system according to the present invention.
The entire vehicle thermal management system specifically includes an air conditioning loop 602, a power system heat exchange loop 604 and a battery loop 606, as shown in fig. 6, the air conditioning loop 602 and the battery loop 606 can interact with the power system heat exchange loop 604 respectively.
The refrigerant adjusting device includes, but is not limited to, an electronic water pump 6024, an electronic water pump 6044, an electronic water pump 6064, a condenser 6022, a one-way valve 6026, a shutoff valve 6028, a radiator 6042, a four-way valve 6046, a three-way valve 6048, a shutoff valve 6062, and the like.
By controlling the running state of the refrigerant adjusting device, the execution of the heat management operation in the heat management system is realized.
With reference to the finished vehicle management system in fig. 6, fig. 7 is a flowchart illustrating steps of another embodiment of a control method of a finished vehicle thermal management system according to the present invention, where the method includes:
and detecting the temperature of the cooling liquid at the battery inlet in the battery loop so as to determine the temperature of the cooling liquid as a first working condition parameter.
And under the condition that the first working condition parameter is smaller than the corresponding cooling liquid threshold value, detecting the temperature of the battery core body in the battery loop so as to determine the temperature of the battery core body as a second working condition parameter.
Generating a battery heating demand code or a battery cooling demand code based on a relationship between the second operating condition parameter and the battery heating demand threshold and/or the battery cooling demand threshold.
And detecting the temperature of the member cabin of the whole vehicle to determine the temperature of the member cabin as a third working condition parameter.
And generating an air-conditioning refrigeration demand code and/or an air-conditioning heating demand code according to the relationship between the third working condition parameter and the air-conditioning refrigeration demand threshold and/or the air-conditioning heating demand threshold.
And detecting the radiator inlet water temperature in the heat exchange loop of the power system to determine the radiator inlet water temperature as a fourth working condition parameter.
In the event that the fourth operating condition parameter is greater than the ambient temperature, a cooling demand code for the power system heat exchange loop is generated.
As shown in fig. 7, the demand code of the demand information includes three stages, the first stage corresponds to a battery heat exchange circuit, the second stage corresponds to an air conditioning circuit, and the third stage corresponds to a power system heat exchange circuit, where the power system heat exchange circuit includes a vehicle-mounted charger, a voltage converter, a power distribution unit, an MCU, a driving motor, and the like.
For example, the cooling requirement of the battery is judged, the temperature of the battery is higher than 35 ℃ under the driving working condition of the vehicle, the battery needs to be cooled, and the temperature of the battery is higher than 25 ℃ under the quick charging working condition, and other judgment principles are similar.
The generation process of the code 2 is slightly different from that of the code 1, because the vehicle control unit can send a request for starting and a request for switching the accessory state to other controllers according to the code 1, for example, the vehicle control unit can send a battery cooling request to the air conditioning system, after the air conditioning system is enabled by feedback, the battery cooling request can be finally established, that is, the code representing the battery cooling request in the code 2 can be the same as the code 1, and if the air conditioning system is not enabled by feedback of the battery cooling request, the battery cooling request is determined to be the battery cooling-free request in the generation process of the code 2. Other decisions are analogized. And the final code 2 is the requirement that all controllers of the whole vehicle can realize together. And thus performs the subsequent processes.
It should be noted that, for simplicity of description, the method embodiments are described as a series of acts or combination of acts, but those skilled in the art will recognize that the present invention is not limited by the illustrated order of acts, as some steps may occur in other orders or concurrently in accordance with the embodiments of the present invention. Further, those skilled in the art will appreciate that the embodiments described in the specification are presently preferred and that no particular act is required to implement the invention.
Referring to fig. 8, there is shown a block diagram of a vehicle 80 according to the present invention, including: the controller 802 and the memory 804, wherein the memory 804 stores instructions executable by the controller 802, so that the controller 802 can execute the steps of the control method of the vehicle thermal management system according to any embodiment of the present invention.
The computer-readable medium of an embodiment of the present invention stores computer-executable instructions for performing:
determining a requirement threshold value of the thermal management operation matched with the working state based on the acquired working state of the whole vehicle;
generating requirement information of the whole vehicle thermal management system according to the collected working condition parameters of the whole vehicle thermal management system and the corresponding relation between the working condition parameters and the requirement threshold;
generating control information according to the integration relation of the plurality of heat exchange loops and the demand information;
and configuring the running state of the refrigerant adjusting device according to the control information.
Optionally, the generating control information according to the integration relationship of the plurality of heat exchange loops and the demand information includes:
determining the operating state of the refrigerant adjusting device to be configured according to the demand information and the integration relation;
judging whether the running state to be configured has an interference phenomenon in a plurality of simultaneous thermal management operations;
under the condition that the interference phenomenon exists, adjusting the running state to be configured according to a preset adjusting mode to eliminate the interference phenomenon;
and updating the demand information according to the adjusted running state so as to regenerate the control information.
Optionally, the adjusting, when the interference phenomenon exists, the operating state to be configured according to a preset adjustment manner to eliminate the interference phenomenon includes:
determining a plurality of thermal management operations corresponding to a plurality of running states to be configured as requirements to be adjusted under the condition that the interference phenomenon exists;
calculating the difference between the working condition parameter in the demand to be adjusted and the corresponding demand threshold;
and determining the requirement to be adjusted with the largest difference value as the thermal management operation to be executed, and canceling other thermal management operations in the requirement to be adjusted so as to eliminate the interference phenomenon.
Optionally, the adjusting, when the interference phenomenon exists, the operating state to be configured according to a preset adjustment manner to eliminate the interference phenomenon includes:
determining the execution priority of various thermal management operations corresponding to a plurality of running states to be configured respectively under the condition that the interference phenomenon exists;
and sequentially configuring the refrigerant adjusting devices to the corresponding operating states according to the execution priority so as to eliminate the interference phenomenon.
Optionally, the generating control information according to the integration relationship of the plurality of heat exchange loops and the demand information further includes:
under the condition that the integration relation comprises that at least one refrigerant adjusting device is controlled by an independent controller, sending a configuration instruction of the at least one refrigerant adjusting device to the independent controller according to the requirement information;
receiving a feedback signal fed back by the independent controller according to the configuration instruction;
if the feedback signal is an enabling signal, determining the corresponding demand information as the control information;
and if the feedback signal is a non-enabling signal, deleting the corresponding requirement information.
Optionally, the control method further includes:
under the condition that the working state of the whole vehicle is changed, the working condition parameters and/or the requirement threshold are/is updated according to the changed working state, so that the updated requirement information is obtained according to the updated working condition parameters and/or the requirement threshold;
and regenerating the control information according to the updated demand information.
Optionally, the determining a requirement threshold of the thermal management operation matched with the operating state includes:
determining the temperature and humidity regulation requirement of the heat exchange loop matched with the working state;
determining a heating demand threshold and/or a cooling demand threshold for executing the temperature and humidity regulation demand in the working state;
determining the heating demand threshold and/or the cooling demand threshold as the demand threshold.
Optionally, the generating of the requirement information of the complete vehicle thermal management system according to the collected operating condition parameters of the complete vehicle thermal management system and the correspondence between the operating condition parameters and the requirement thresholds includes:
respectively collecting working condition parameters of each heat exchange loop;
determining a cooling demand as a thermal management operation of the heat exchange loop under the condition that the working condition parameter is greater than a cooling demand threshold of the heat exchange loop;
determining the heating requirement as the heat management operation of the heat exchange loop under the condition that the working condition parameter is smaller than the heating requirement threshold of the heat exchange loop;
generating corresponding requirement information according to the thermal management operation,
the heat exchange loop comprises at least one of an air conditioner loop, a power system heat exchange loop and a battery heat exchange loop.
Optionally, before determining the requirement threshold of the thermal management operation, which is matched with the operating state, based on the acquired operating state of the entire vehicle, the method further includes:
detecting the charge-discharge state of a battery of the whole vehicle;
under the condition that the working state of the whole vehicle is a discharging state, determining that the working state of the whole vehicle is a running state;
and under the condition that the working state of the whole vehicle is a charging state, acquiring the charging power of the battery, and determining whether the charging state is a fast charging state or a slow charging state according to the charging power.
Optionally, the refrigerant adjusting device includes at least one of a control valve, a pump body, a fan, a compressor, and an expansion valve.
The embodiments in the present specification are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, apparatus, or computer program product. Accordingly, embodiments of the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, embodiments of the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
Embodiments of the present invention are described with reference to flowchart illustrations and/or block diagrams of methods, terminal devices (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing terminal to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing terminal, create means for implementing the requirements specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing terminal to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing terminal to cause a series of operational steps to be performed on the computer or other programmable terminal to produce a computer implemented process such that the instructions which execute on the computer or other programmable terminal provide steps for implementing the requirements specified in the flowchart flow or flows and/or block diagram block or blocks.
While preferred embodiments of the present invention have been described, additional variations and modifications of these embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the embodiments of the invention.
Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or terminal that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or terminal. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or terminal that comprises the element.
The control method of the vehicle thermal management system and the clock calibration device provided by the invention are described in detail, a specific example is applied in the text to explain the principle and the implementation mode of the invention, and the description of the embodiment is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (12)
1. The control method of the whole vehicle heat management system is characterized by comprising a plurality of integrated heat exchange loops, wherein a refrigerant adjusting device is arranged on each heat exchange loop, and each heat exchange loop correspondingly executes at least one heat management operation, and the control method comprises the following steps:
determining a requirement threshold value of the thermal management operation matched with the working state based on the acquired working state of the whole vehicle;
generating requirement information of the whole vehicle thermal management system according to the collected working condition parameters of the whole vehicle thermal management system and the corresponding relation between the working condition parameters and the requirement threshold;
generating control information according to the integration relation of the plurality of heat exchange loops and the demand information;
and configuring the running state of the refrigerant adjusting device according to the control information.
2. The method for controlling the finished automobile thermal management system according to claim 1, wherein the generating control information according to the integration relationship of the plurality of heat exchange loops and the demand information comprises:
determining the operating state of the refrigerant adjusting device to be configured according to the demand information and the integration relation;
judging whether the running state to be configured has an interference phenomenon in a plurality of simultaneous thermal management operations;
under the condition that the interference phenomenon exists, adjusting the running state to be configured according to a preset adjusting mode to eliminate the interference phenomenon;
and updating the demand information according to the adjusted running state so as to regenerate the control information.
3. The control method of the finished automobile thermal management system according to claim 2, wherein the adjusting the running state to be configured according to a preset adjusting mode to eliminate the interference phenomenon under the condition that the interference phenomenon exists comprises:
determining a plurality of thermal management operations corresponding to a plurality of running states to be configured as requirements to be adjusted under the condition that the interference phenomenon exists;
calculating the difference between the working condition parameter in the demand to be adjusted and the corresponding demand threshold;
and determining the requirement to be adjusted with the largest difference value as the thermal management operation to be executed, and canceling other thermal management operations in the requirement to be adjusted so as to eliminate the interference phenomenon.
4. The control method of the finished automobile thermal management system according to claim 2, wherein the adjusting the running state to be configured according to a preset adjusting mode to eliminate the interference phenomenon under the condition that the interference phenomenon exists comprises:
determining the execution priority of various thermal management operations corresponding to a plurality of running states to be configured respectively under the condition that the interference phenomenon exists;
and sequentially configuring the refrigerant adjusting devices to the corresponding operating states according to the execution priority so as to eliminate the interference phenomenon.
5. The method for controlling the finished automobile thermal management system according to claim 1, wherein the step of generating control information according to the integration relationship of the plurality of heat exchange loops and the demand information further comprises the steps of:
under the condition that the integration relation comprises that at least one refrigerant adjusting device is controlled by an independent controller, sending a configuration instruction of the at least one refrigerant adjusting device to the independent controller according to the requirement information;
receiving a feedback signal fed back by the independent controller according to the configuration instruction;
if the feedback signal is an enabling signal, determining the corresponding demand information as the control information;
and if the feedback signal is a non-enabling signal, deleting the corresponding requirement information.
6. The control method of the finished automobile thermal management system according to claim 1, further comprising:
under the condition that the working state of the whole vehicle is changed, the working condition parameters and/or the requirement threshold are/is updated according to the changed working state, so that the updated requirement information is obtained according to the updated working condition parameters and/or the requirement threshold;
and regenerating the control information according to the updated demand information.
7. The method for controlling the finished automobile thermal management system according to claim 1, wherein the determining the requirement threshold of the thermal management operation matched with the working state comprises:
determining the temperature and humidity regulation requirement of the heat exchange loop matched with the working state;
determining a heating demand threshold and/or a cooling demand threshold for executing the temperature and humidity regulation demand in the working state;
determining the heating demand threshold and/or the cooling demand threshold as the demand threshold.
8. The method for controlling the finished automobile thermal management system according to claim 7, wherein the step of generating the requirement information of the finished automobile thermal management system according to the collected working condition parameters of the finished automobile thermal management system and the corresponding relationship between the working condition parameters and the requirement threshold comprises the steps of:
respectively collecting working condition parameters of each heat exchange loop;
determining a cooling demand as a thermal management operation of the heat exchange loop under the condition that the working condition parameter is greater than a cooling demand threshold of the heat exchange loop;
determining the heating requirement as the heat management operation of the heat exchange loop under the condition that the working condition parameter is smaller than the heating requirement threshold of the heat exchange loop;
generating corresponding requirement information according to the thermal management operation,
the heat exchange loop comprises at least one of an air conditioner loop, a power system heat exchange loop and a battery heat exchange loop.
9. The control method of the finished automobile thermal management system according to any one of claims 1 to 8, wherein before determining the requirement threshold of the thermal management operation that matches the operating state based on the acquired finished automobile operating state, the method further includes:
detecting the charge-discharge state of a battery of the whole vehicle;
under the condition that the working state of the whole vehicle is a discharging state, determining that the working state of the whole vehicle is a running state;
and under the condition that the working state of the whole vehicle is a charging state, acquiring the charging power of the battery, and determining whether the charging state is a fast charging state or a slow charging state according to the charging power.
10. The control method of the whole vehicle thermal management system according to any one of claims 1 to 8, wherein the refrigerant adjusting device comprises at least one of a control valve, a pump body, a fan, a compressor and an expansion valve.
11. A vehicle, characterized by comprising: the vehicle control unit and the memory are arranged, wherein,
the memory stores instructions executable by the vehicle control unit to enable the vehicle control unit to perform the steps of the control method of the vehicle thermal management system of any of claims 1 to 10.
12. A computer-readable storage medium storing computer-executable instructions for performing the method of controlling the overall vehicle thermal management system according to any one of claims 1 to 10.
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