CN115991074A - Heat management system of new energy automobile and adjusting method thereof - Google Patents
Heat management system of new energy automobile and adjusting method thereof Download PDFInfo
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- CN115991074A CN115991074A CN202211504864.8A CN202211504864A CN115991074A CN 115991074 A CN115991074 A CN 115991074A CN 202211504864 A CN202211504864 A CN 202211504864A CN 115991074 A CN115991074 A CN 115991074A
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Abstract
The invention discloses a thermal management system of a new energy automobile and an adjusting method thereof, wherein the thermal management system comprises an air conditioner warm air subsystem, a driving and electric control assembly subsystem and a battery pack subsystem, the air conditioner warm air subsystem, the driving and electric control assembly subsystem and the battery pack subsystem are all controlled by a whole automobile controller (VCU) of the new energy automobile, and the driving and electric control assembly subsystem comprises an electronic water pump, a pressure sensor, a flow sensor, a water temperature sensor, a driving motor, a three-way water valve, an expansion kettle, a radiator and a controller. In the using process, the invention fully utilizes the waste heat of the heating component to carry out temperature management through the functions of real-time feedback and real-time control, thereby effectively reducing the energy consumption of the battery, achieving the energy saving effect, being capable of being freely switched under three loops to adapt to different using working conditions of the new energy automobile, and being capable of realizing the advantages of controlling the electronic water pump, along with low energy consumption, high efficiency and stable performance.
Description
Technical Field
The invention relates to the technical field of new energy automobiles, in particular to a heat management system of a new energy automobile and an adjusting method thereof.
Background
Compared with the traditional fuel oil automobile, the new energy (hybrid power/electric) automobile must meet the heat management requirements of an air conditioner and a driving motor, and strict heat management control of a storage battery. The battery is used as a main storage battery pack of the new energy (hybrid power/electric) automobile, is a key component of the new energy (hybrid power/electric) automobile, and the performance of the new energy (hybrid power/electric) automobile is directly influenced.
However, there is a problem in the new energy (hybrid/electric) automobile thermal management system: because the space in the vehicle is limited, the heat accumulation of the storage battery in the running process can lead to uneven temperature of the storage battery, and the consistency of the storage battery is influenced, so that the efficiency of charge and discharge circulation of the storage battery is influenced, the power and energy utilization rate of the storage battery are influenced, and the thermal runaway is caused, so that the safety and the reliability of a vehicle system are influenced. At low temperature, the charge capacity and discharge power of the battery drop sharply, and the battery cannot be charged and discharged normally when severe. In order to maximize battery performance, new energy (hybrid/electric) vehicles must thermally manage the battery and maintain its temperature within a reasonable range.
At present, most heat management systems adopt open loop control, namely pressure, flow and temperature sensors do not feed back real-time to actual conditions, and cannot be controlled in real time according to the actual conditions. The heat generated by the driving motor can not be fully utilized in the running process of the new energy (hybrid power/electric) automobile, so that energy waste is caused, and the energy conservation and the environmental protection are not facilitated. Therefore, we propose a new energy automobile thermal management system and its adjusting method.
Disclosure of Invention
The invention aims to solve the defects in the prior art, and provides a heat management system of a new energy automobile and an adjusting method thereof.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
the heat management system of the new energy automobile comprises an air conditioning and warm air subsystem, a driving and electric control assembly subsystem and a battery pack subsystem, wherein the air conditioning and warm air subsystem, the driving and electric control assembly subsystem and the battery pack subsystem are controlled by a whole automobile controller (VCU) of the new energy automobile;
the driving and electric control assembly subsystem comprises an electronic water pump 1, a pressure sensor 2, a flow sensor 1, a water temperature sensor 1, a driving motor, a three-way water valve 1, an expansion kettle, a radiator and a controller;
the air conditioning and heating subsystem comprises an electronic water pump 2, a pressure sensor 3, a pressure sensor 4, a flow sensor 2, a water temperature sensor 2, a PTC heater, a three-way water valve 3, an evaporator, a three-way water valve 2 and an expansion kettle;
the battery pack subsystem comprises an electronic water pump 2, a pressure sensor 3, a pressure sensor 4, a flow sensor 2, a water temperature sensor 2, a PTC heater, a three-way water valve 3, a battery pack, a three-way water valve 2 and an expansion kettle;
the battery pack subsystem is connected with the driving and electric control assembly subsystem through a three-way water valve 1, and the battery pack subsystem is connected with the air conditioning and heating subsystem through a three-way water valve 2 and a three-way water valve 3;
the cooling liquid circulation loop of the heating mode of the air conditioning and heating subsystem is as follows: expansion kettle, pressure sensor 3, electronic water pump 2, pressure sensor 4, flow sensor 2, water temperature sensor 2, PTC heater, three-way water valve 3, evaporator, three-way water valve 2 and expansion kettle;
the cooling liquid circulation loop 1 of the cooling mode of the driving and electric control assembly subsystem is as follows: expansion kettle, radiator, pressure sensor 1, electronic water pump 1, pressure sensor 2, flow sensor 1, water temperature sensor 1, controller, driving motor, three-way water valve and expansion kettle;
the driving and electric control assembly subsystem and the battery pack subsystem are connected, and the cooling liquid circulation loop 2 giving the battery pack heating mode by utilizing heat generated by the controller and the driving motor during operation is as follows: expansion kettle, radiator, pressure sensor 1, electronic water pump 1, pressure sensor 2, flow sensor 1, water temperature sensor 1, controller, driving motor, three-way water valve 1, battery pack and expansion kettle;
the loop that air conditioner warm braw subsystem, battery package subsystem are connected utilizes PTC heater to give battery package heating mode's coolant liquid circulation loop to be: expansion kettle, pressure sensor 3, electronic water pump 2, pressure sensor 4, flow sensor 2, water temperature sensor 2, PTC heater, three-way water valve 3, battery pack, three-way water valve 2 and expansion kettle.
Preferably, in the air conditioning and heating subsystem, the PTC heater heats the cooling liquid, and then blows heat into the cabin via a fan on the evaporator, thereby realizing heating in the vehicle.
Preferably, in the battery pack subsystem, after the PTC heater heats the cooling liquid, heat passes through the inside of the battery pack, so as to heat the battery pack.
Preferably, the PTC heater is a positive temperature coefficient resistance wire.
Preferably, the measuring ranges of the pressure sensor 1 and the pressure sensor 3 are-100-100 kPa, the measuring ranges of the pressure sensor 2 and the pressure sensor 4 are 0-200kPa, the precision is 0.5% F.S., the working voltage is 5-24V, and the output signal is 1-5V.
Preferably, the measuring ranges of the flow sensor 1 and the flow sensor 2 are 0-100L/min, the precision is +/-1%, the lowest rated voltage is 4.5V, the power supply range is 5-24V, the load capacity is less than or equal to 10mA, and the maximum working current is 15mA.
Preferably, the temperature sensor 1 and the temperature sensor 2 are Pt100, NTC thermistor, and are connected to a temperature control instrument by a three-wire connection method, so as to realize water temperature measurement.
A method for adjusting a thermal management system of a new energy automobile comprises the following steps:
step 1: the lift of the electronic water pump 1 during working, namely the system pressure of a loop, is obtained by calculating the pressures measured by the pressure sensor 1 and the pressure sensor 2;
step 2: measuring the flow of the electronic water pump 1 during working, namely the flow of the cooling liquid of the loop through the flow sensor 1;
step 3: the temperature of the cooling liquid of the loop is measured through the water temperature sensor 1, so that the working state of the electronic water pump 1 is controlled in real time, when the temperature of the cooling liquid is measured to be lower, the VCU of the whole vehicle sends out a control signal, the rotating speed of the electronic water pump 1 is reduced, the pressure and the flow of the system are synchronously reduced, otherwise, the rotating speed of the electronic water pump 1 is increased, and the pressure and the flow of the system are synchronously increased;
step 4: the lift of the electronic water pump 2 during working, namely the system pressure of a loop, is obtained by calculating the pressures measured by the pressure sensor 3 and the pressure sensor 4;
step 5: measuring the flow of the electronic water pump 2 during working, namely the flow of the cooling liquid of the loop through the flow sensor 2;
step 6: the temperature of the cooling liquid is measured by the water temperature sensor 2, the working state of the electronic water pump 2 is controlled in real time, when the temperature of the cooling liquid is measured to be lower, the VCU of the whole vehicle sends out a control signal, the rotating speed of the electronic water pump 2 is reduced, the system pressure and the flow are synchronously reduced, otherwise, the rotating speed of the electronic water pump 2 is increased, and the system pressure and the flow are synchronously increased.
The invention provides a heat management system of a new energy automobile and an adjusting method thereof, which have the beneficial effects that:
in the running process of the automobile, the heat of the heating component is fully utilized to carry out temperature management, the energy consumption of the battery is effectively reduced, the effects of comfort and energy conservation are achieved, the real-time feedback on the specific working condition of the automobile is realized through the adaptive control of three closed loops, and the heat management system can effectively carry out real-time control according to the actual working state of the automobile, so that the energy waste is avoided, and the energy conservation and the environmental protection are facilitated.
Drawings
FIG. 1 is a schematic diagram of a thermal management system for a new energy vehicle according to the present invention;
FIG. 2 is a heating pattern loop diagram of an air conditioning and heating subsystem of a thermal management system of a new energy automobile according to the present invention;
FIG. 3 is a circuit diagram of a heat dissipation mode of a driving and electric control assembly subsystem of a thermal management system of a new energy automobile according to the present invention;
FIG. 4 is a schematic diagram showing a heating mode loop of a thermal management system of a new energy automobile after the driving and electric control subsystem and the battery pack subsystem are connected;
FIG. 5 is a circuit diagram of a heating mode of a new energy automobile after the connection of an air conditioning and heating subsystem and a battery pack subsystem of the heat management system of the new energy automobile;
fig. 6 is a graph showing the variation of the lift of an electronic water pump of a thermal management system of a new energy automobile according to the present invention;
FIG. 7 is a graph showing the driving power of the thermal management system of the new energy automobile according to the present invention;
fig. 8 is a graph showing a pump efficiency value of a thermal management system of a new energy automobile according to the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments.
In the description of the present invention, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present invention and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Referring to fig. 1-8, a thermal management system of a new energy automobile comprises an air conditioning and heating subsystem, a driving and electric control assembly subsystem and a battery pack subsystem, wherein the air conditioning and heating subsystem, the driving and electric control assembly subsystem and the battery pack subsystem are all controlled by a Vehicle Control Unit (VCU) of the new energy automobile;
the driving and electric control assembly subsystem comprises an electronic water pump 1, a pressure sensor 2, a flow sensor 1, a water temperature sensor 1, a driving motor, a three-way water valve 1, an expansion kettle, a radiator and a controller;
the air conditioning and heating subsystem comprises an electronic water pump 2, a pressure sensor 3, a pressure sensor 4, a flow sensor 2, a water temperature sensor 2, a PTC heater, a three-way water valve 3, an evaporator, a three-way water valve 2 and an expansion kettle;
the battery pack subsystem comprises an electronic water pump 2, a pressure sensor 3, a pressure sensor 4, a flow sensor 2, a water temperature sensor 2, a PTC heater, a three-way water valve 3, a battery pack, a three-way water valve 2 and an expansion kettle;
the battery pack subsystem is connected with the driving and electric control assembly subsystem through a three-way water valve 1, and the battery pack subsystem is connected with the air conditioning and heating subsystem through a three-way water valve 2 and a three-way water valve 3;
the cooling liquid circulation loop of the heating mode of the air conditioning and heating subsystem is as follows: expansion kettle, pressure sensor 3, electronic water pump 2, pressure sensor 4, flow sensor 2, water temperature sensor 2, PTC heater, three-way water valve 3, evaporator, three-way water valve 2 and expansion kettle;
the cooling liquid circulation loop 1 of the cooling mode of the driving and electric control assembly subsystem is as follows: expansion kettle, radiator, pressure sensor 1, electronic water pump 1, pressure sensor 2, flow sensor 1, water temperature sensor 1, controller, driving motor, three-way water valve and expansion kettle;
the driving and electric control assembly subsystem and the battery pack subsystem are connected, and the cooling liquid circulation loop 2 giving the battery pack heating mode by utilizing heat generated by the controller and the driving motor during operation is as follows: expansion kettle, radiator, pressure sensor 1, electronic water pump 1, pressure sensor 2, flow sensor 1, water temperature sensor 1, controller, driving motor, three-way water valve 1, battery pack and expansion kettle;
the loop that air conditioner warm braw subsystem, battery package subsystem are connected utilizes PTC heater to give battery package heating mode's coolant liquid circulation loop to be: expansion kettle, pressure sensor 3, electronic water pump 2, pressure sensor 4, flow sensor 2, water temperature sensor 2, PTC heater, three-way water valve 3, battery pack, three-way water valve 2 and expansion kettle.
When in use, the utility model is characterized in that: the lift of the electronic water pump 1 during working, namely the system pressure of a loop, is obtained by calculating the pressures measured by the pressure sensor 1 and the pressure sensor 2; measuring the flow of the electronic water pump 1 during working, namely the flow of the cooling liquid of the loop through the flow sensor 1; the temperature of the cooling liquid of the loop is measured through the water temperature sensor 1, so that the working state of the electronic water pump 1 is controlled in real time, when the temperature of the cooling liquid is measured to be lower, the VCU of the whole vehicle sends out a control signal, the rotating speed of the electronic water pump 1 is reduced, the pressure and the flow of the system are synchronously reduced, otherwise, the rotating speed of the electronic water pump 1 is increased, and the pressure and the flow of the system are synchronously increased; the lift of the electronic water pump 2 during working, namely the system pressure of a loop, is obtained by calculating the pressures measured by the pressure sensor 3 and the pressure sensor 4; measuring the flow of the electronic water pump 2 during working, namely the flow of the cooling liquid of the loop through the flow sensor 2; the temperature of the cooling liquid is measured by the water temperature sensor 2, the working state of the electronic water pump 2 is controlled in real time, when the temperature of the cooling liquid is measured to be lower, the VCU of the whole vehicle sends out a control signal, the rotating speed of the electronic water pump 2 is reduced, the system pressure and the flow are synchronously reduced, otherwise, the rotating speed of the electronic water pump 2 is increased, and the system pressure and the flow are synchronously increased.
In the air conditioning and heating subsystem, after the PTC heater heats the cooling liquid, heat is blown into the cabin through a fan on the evaporator, heating in the vehicle is achieved, in the battery pack subsystem, after the PTC heater heats the cooling liquid, heat passes through the inside of the battery pack, heating of the battery pack is achieved, and the PTC heater is a positive temperature coefficient resistance wire.
The measuring ranges of the pressure sensor 1 and the pressure sensor 3 are-100-100 kPa, the measuring ranges of the pressure sensor 2 and the pressure sensor 4 are 0-200kPa, the precision is 0.5 percent F.S., the working voltage is 5-24V, the output signal is 1-5V, the measuring ranges of the flow sensor 1 and the flow sensor 2 are 0-100L/min, the precision is +/-1%, the lowest rated voltage is 4.5V, the power supply range is 5-24V, the load capacity is less than or equal to 10mA, the maximum working current is 15mA, the models of the temperature sensor 1 and the temperature sensor 2 are Pt100, the models are NTC thermistors, and a three-wire connection method is adopted to connect into a temperature control instrument so as to realize the measurement of water temperature.
A method for adjusting a thermal management system of a new energy automobile comprises the following steps:
step 1: the lift of the electronic water pump 1 during working, namely the system pressure of a loop, is obtained by calculating the pressures measured by the pressure sensor 1 and the pressure sensor 2;
step 2: measuring the flow of the electronic water pump 1 during working, namely the flow of the cooling liquid of the loop through the flow sensor 1;
step 3: the temperature of the cooling liquid of the loop is measured through the water temperature sensor 1, so that the working state of the electronic water pump 1 is controlled in real time, when the temperature of the cooling liquid is measured to be lower, the VCU of the whole vehicle sends out a control signal, the rotating speed of the electronic water pump 1 is reduced, the pressure and the flow of the system are synchronously reduced, otherwise, the rotating speed of the electronic water pump 1 is increased, and the pressure and the flow of the system are synchronously increased;
step 4: the lift of the electronic water pump 2 during working, namely the system pressure of a loop, is obtained by calculating the pressures measured by the pressure sensor 3 and the pressure sensor 4;
step 5: measuring the flow of the electronic water pump 2 during working, namely the flow of the cooling liquid of the loop through the flow sensor 2;
step 6: the temperature of the cooling liquid is measured by the water temperature sensor 2, the working state of the electronic water pump 2 is controlled in real time, when the temperature of the cooling liquid is measured to be lower, the VCU of the whole vehicle sends out a control signal, the rotating speed of the electronic water pump 2 is reduced, the system pressure and the flow are synchronously reduced, otherwise, the rotating speed of the electronic water pump 2 is increased, and the system pressure and the flow are synchronously increased.
According to the invention, through the functions of real-time feedback and real-time control, the waste heat of the heating component is fully utilized for temperature management, so that the energy consumption of the battery is effectively reduced, and the comfortable energy-saving effect is achieved; and can freely switch under three kinds of closed loop in order to adapt to the different operating modes of new energy automobile, can also realize controlling electronic water pump's advantage, the energy consumption is low, efficient, stable performance.
The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical scheme of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.
Claims (8)
1. The utility model provides a new energy automobile's thermal management system which characterized in that: the system comprises an air-conditioning warm air subsystem, a driving and electric control assembly subsystem and a battery pack subsystem, wherein the air-conditioning warm air subsystem, the driving and electric control assembly subsystem and the battery pack subsystem are all controlled by a whole Vehicle Controller (VCU) of a new energy automobile;
the driving and electric control assembly subsystem comprises an electronic water pump 1, a pressure sensor 2, a flow sensor 1, a water temperature sensor 1, a driving motor, a three-way water valve 1, an expansion kettle, a radiator and a controller;
the air conditioning and heating subsystem comprises an electronic water pump 2, a pressure sensor 3, a pressure sensor 4, a flow sensor 2, a water temperature sensor 2, a PTC heater, a three-way water valve 3, an evaporator, a three-way water valve 2 and an expansion kettle;
the battery pack subsystem comprises an electronic water pump 2, a pressure sensor 3, a pressure sensor 4, a flow sensor 2, a water temperature sensor 2, a PTC heater, a three-way water valve 3, a battery pack, a three-way water valve 2 and an expansion kettle;
the battery pack subsystem is connected with the driving and electric control assembly subsystem through a three-way water valve 1, and the battery pack subsystem is connected with the air conditioning and heating subsystem through a three-way water valve 2 and a three-way water valve 3;
the cooling liquid circulation loop of the heating mode of the air conditioning and heating subsystem is as follows: expansion kettle, pressure sensor 3, electronic water pump 2, pressure sensor 4, flow sensor 2, water temperature sensor 2, PTC heater, three-way water valve 3, evaporator, three-way water valve 2 and expansion kettle;
the cooling liquid circulation loop 1 of the cooling mode of the driving and electric control assembly subsystem is as follows: expansion kettle, radiator, pressure sensor 1, electronic water pump 1, pressure sensor 2, flow sensor 1, water temperature sensor 1, controller, driving motor, three-way water valve and expansion kettle;
the driving and electric control assembly subsystem and the battery pack subsystem are connected, and the cooling liquid circulation loop 2 giving the battery pack heating mode by utilizing heat generated by the controller and the driving motor during operation is as follows: expansion kettle, radiator, pressure sensor 1, electronic water pump 1, pressure sensor 2, flow sensor 1, water temperature sensor 1, controller, driving motor, three-way water valve 1, battery pack and expansion kettle;
the loop that air conditioner warm braw subsystem, battery package subsystem are connected utilizes PTC heater to give battery package heating mode's coolant liquid circulation loop to be: expansion kettle, pressure sensor 3, electronic water pump 2, pressure sensor 4, flow sensor 2, water temperature sensor 2, PTC heater, three-way water valve 3, battery pack, three-way water valve 2 and expansion kettle.
2. The thermal management system of a new energy automobile according to claim 1, wherein in the air conditioning and heating subsystem, the PTC heater heats the cooling liquid and blows the heat into the cabin via a fan on the evaporator to heat the interior of the automobile.
3. The thermal management system of a new energy automobile according to claim 1, wherein in the battery pack subsystem, the PTC heater heats the cooling liquid, and then the heat passes through the inside of the battery pack to heat the battery pack.
4. The thermal management system of a new energy vehicle of claim 1, wherein said PTC heater is a PTC resistive wire.
5. The thermal management system of the new energy automobile according to claim 1, wherein the measuring ranges of the pressure sensor 1 and the pressure sensor 3 are-100-100 kPa, the measuring ranges of the pressure sensor 2 and the pressure sensor 4 are 0-200kPa, the precision is 0.5% f.s., the working voltage is 5-24V, and the output signal is 1-5V.
6. The thermal management system of the new energy automobile according to claim 1, wherein the measuring range of the flow sensor 1 and the flow sensor 2 is 0-100L/min, the precision is +/-1%, the lowest rated voltage is 4.5V, the power supply range is 5-24V, the load capacity is less than or equal to 10mA, and the maximum working current is 15mA.
7. The thermal management system of a new energy automobile according to claim 1, wherein the temperature sensor 1 and the temperature sensor 2 are Pt100 and NTC thermistor, and the temperature control instrument is connected by a three-wire connection method to measure the water temperature.
8. A method of adjusting a thermal management system of a new energy vehicle according to any one of claims 1 to 7, comprising the steps of:
step 1: the lift of the electronic water pump 1 during working, namely the system pressure of a loop, is obtained by calculating the pressures measured by the pressure sensor 1 and the pressure sensor 2;
step 2: measuring the flow of the electronic water pump 1 during working, namely the flow of the cooling liquid of the loop through the flow sensor 1;
step 3: the temperature of the cooling liquid of the loop is measured through the water temperature sensor 1, so that the working state of the electronic water pump 1 is controlled in real time, when the temperature of the cooling liquid is measured to be lower, the VCU of the whole vehicle sends out a control signal, the rotating speed of the electronic water pump 1 is reduced, the pressure and the flow of the system are synchronously reduced, otherwise, the rotating speed of the electronic water pump 1 is increased, and the pressure and the flow of the system are synchronously increased;
step 4: the lift of the electronic water pump 2 during working, namely the system pressure of a loop, is obtained by calculating the pressures measured by the pressure sensor 3 and the pressure sensor 4;
step 5: measuring the flow of the electronic water pump 2 during working, namely the flow of the cooling liquid of the loop through the flow sensor 2;
step 6: the temperature of the cooling liquid is measured by the water temperature sensor 2, the working state of the electronic water pump 2 is controlled in real time, when the temperature of the cooling liquid is measured to be lower, the VCU of the whole vehicle sends out a control signal, the rotating speed of the electronic water pump 2 is reduced, the system pressure and the flow are synchronously reduced, otherwise, the rotating speed of the electronic water pump 2 is increased, and the system pressure and the flow are synchronously increased.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211504864.8A CN115991074A (en) | 2022-11-28 | 2022-11-28 | Heat management system of new energy automobile and adjusting method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211504864.8A CN115991074A (en) | 2022-11-28 | 2022-11-28 | Heat management system of new energy automobile and adjusting method thereof |
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| CN115991074A true CN115991074A (en) | 2023-04-21 |
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| CN202211504864.8A Pending CN115991074A (en) | 2022-11-28 | 2022-11-28 | Heat management system of new energy automobile and adjusting method thereof |
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