CN106711548B - Air thermal management system for power battery of pure electric vehicle and working method of air thermal management system - Google Patents
Air thermal management system for power battery of pure electric vehicle and working method of air thermal management system Download PDFInfo
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- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/61—Types of temperature control
- H01M10/613—Cooling or keeping cold
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- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
- B60L58/24—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries
- B60L58/26—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries by cooling
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- H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
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- H01M10/63—Control systems
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- H01M10/63—Control systems
- H01M10/635—Control systems based on ambient temperature
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- H—ELECTRICITY
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- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
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- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
- H01M10/6561—Gases
- H01M10/6566—Means within the gas flow to guide the flow around one or more cells, e.g. manifolds, baffles or other barriers
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- H—ELECTRICITY
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- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
- H01M2010/4271—Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing
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- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
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Abstract
The invention relates to an air thermal management system of a power battery of a pure electric vehicle and a working method thereof, wherein the air thermal management system comprises an air distribution pipeline, a temperature sensor and a battery management system all-in-one machine which are connected with a power battery box; one end of the air distribution pipeline is sequentially connected with a heater, an air pump, an air storage tank, a two-position three-way electromagnetic directional valve E, a cooler, a two-position three-way electromagnetic directional valve F and a two-position two-way electromagnetic directional valve, and the two-position three-way electromagnetic directional valve E is also connected with the two-position three-way electromagnetic directional valve F through a pipeline; the other end of the air distribution pipeline is sequentially connected with a two-position three-way electromagnetic directional valve A and a two-position two-way electromagnetic directional valve. The air thermal management system of the power battery has multiple temperature regulation modes, can select corresponding modes according to different battery working conditions, realizes reasonable and fine management of the power battery, can realize automatic switching and control of the multiple modes according to temperature change in a battery box, and has the advantages of accurate regulation, quick conversion and the like.
Description
Technical Field
The invention relates to an air thermal management system of a power battery of a pure electric vehicle and a working method thereof, and belongs to the technical field of electric vehicles.
Background
With the rapid development of economy, the problems of global energy shortage, environmental pollution and the like are increasingly serious, and the development of pure electric vehicles becomes an effective way for solving the problem at present. The power battery is used as a core component for restricting the development of the electric automobile, and is always a hot spot for the disputed investment of a plurality of research and development units and production units. Wherein thermal management of the power cells is one of the key technologies.
The battery thermal management method for engineering application is mainly air cooling and liquid cooling. The liquid cooling system has the advantages of complex structure, large mass, easy short circuit and easy leakage of cooling medium, so the use is less. The air is used as a medium to carry out heat management on the power battery, namely, the air is transversely swept across the battery pack to take away or bring heat, so that the purposes of heat dissipation or heating are achieved. The air-cooled heat dissipation system has the advantages of simple structure, small mass, no pollution to the environment due to leakage of cooling medium, effective ventilation when harmful gas is generated, low cost and the like, and becomes a preferred scheme for heat dissipation of the power battery of the electric automobile.
Most of the existing air cooling schemes are simpler, and some batteries are exposed to air for natural cooling, so that the requirements of power battery thermal management cannot be met. The cooling scheme of part of the power batteries adopts invariable forced cooling, and cannot be correspondingly cooled according to the temperature change of the batteries, so that the extra consumption of the electric quantity of the batteries is increased, and the energy-saving effect is poor.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides an air thermal management system for a power battery of a pure electric vehicle.
The invention also provides a working method of the air thermal management system of the power battery of the pure electric vehicle.
The technical scheme of the invention is as follows:
the air heat management system for the power battery of the pure electric vehicle is characterized by comprising an air distribution pipeline, a temperature sensor and a battery management system all-in-one machine, wherein the air distribution pipeline is connected with a power battery box;
one end of the air distribution pipeline is sequentially connected with a heater, an air pump, an air storage tank, a two-position three-way electromagnetic directional valve E, a cooler, a two-position three-way electromagnetic directional valve F and a two-position two-way electromagnetic directional valve, wherein the two-position three-way electromagnetic directional valve E is also connected with the two-position three-way electromagnetic directional valve F through a pipeline; the other end of the air distribution pipeline is sequentially connected with a two-position three-way electromagnetic reversing valve A and a two-position two-way electromagnetic reversing valve;
the temperature sensor is arranged in the power battery pack box and is in integral electromechanical connection with the battery management system, and the battery management system integral machine is also respectively and electrically connected with the two-position three-way electromagnetic directional valve A, the heater, the air pump, the two-position three-way electromagnetic directional valve E, the cooler, the two-position three-way electromagnetic directional valve F and the two-position two-way electromagnetic directional valve.
Preferably, the two-position two-way electromagnetic directional valve is also connected with an air filter A.
Preferably, the two-position three-way electromagnetic directional valve E is also connected with an air filter B.
Preferably, the air thermal management system further comprises a two-position three-way electromagnetic directional valve C, a two-position three-way electromagnetic directional valve D and a two-position three-way electromagnetic directional valve B; one end of the air distribution pipeline is connected with a two-position three-way electromagnetic directional valve C and a two-position three-way electromagnetic directional valve D through a pipeline, then is connected with a heater, and the other end of the air distribution pipeline is connected with a two-position three-way electromagnetic directional valve A through a pipeline after being connected with a two-position three-way electromagnetic directional valve B; the two-position three-way electromagnetic directional valve C, the two-position three-way electromagnetic directional valve D and the two-position three-way electromagnetic directional valve B are also respectively and integrally and mechanically connected with the battery management system.
Preferably, three interfaces are respectively arranged on the upper side and the lower side of the power battery box, and the air distribution pipeline is communicated with the power battery box through the interfaces. The design has the advantages that the air distribution pipeline inputs air into the power battery box through the three inlets which are distributed in a dispersed way, then outputs the air through heat conduction through the three outlets which are distributed in a dispersed way, so that heat dissipation (heating) is prevented from being concentrated, the heat dissipation (heating) is favorably dispersed and balanced, and the design and processing cost of the power battery box body can be reduced.
The working method of the air heat management system of the power battery of the pure electric vehicle is characterized by comprising the following steps of,
a gas storage circulation mode:
when the pure electric vehicle starts to start, the battery management system all-in-one machine starts a gas storage circulation mode, at the moment, the two-position three-way electromagnetic reversing valve A is electrified, and the air pump is started to circulate air;
and B, normal temperature cooling mode:
when the temperature in the power battery pack box reaches a set threshold value, the battery management system all-in-one machine starts a normal temperature cooling mode I, at the moment, the two-position three-way electromagnetic reversing valve E is electrified, the air pump is started, external air enters the system, and normal temperature cooling is carried out on the power battery pack from bottom to top;
when the normal temperature cooling mode I is operated for a period of time, the battery management system integrated machine restarts the normal temperature cooling mode II, and at the moment, the two-position three-way electromagnetic directional valve B, the two-position three-way electromagnetic directional valve C, the two-position three-way electromagnetic directional valve D and the two-position three-way electromagnetic directional valve E are electrified, the air pump is started, so that external air enters the system, and normal temperature cooling is performed on the power battery pack from top to bottom;
c cryocooling mode:
when the temperature in the power battery pack box reaches a set threshold value, the battery management system all-in-one machine starts a low-temperature cooling mode I, at the moment, the two-position three-way electromagnetic reversing valve A is electrified, the air pump and the cooler are started, external normal-temperature air is cooled into low-temperature air through the cooler, and the low-temperature air carries out low-temperature cooling on the power battery pack from bottom to top;
when the low-temperature cooling mode I is operated for a period of time, the battery management system all-in-one machine restarts the low-temperature cooling mode II, at the moment, the two-position three-way electromagnetic directional valve A, the two-position three-way electromagnetic directional valve B, the two-position three-way electromagnetic directional valve C and the two-position three-way electromagnetic directional valve D are electrified, the air pump and the cooler are started, external normal-temperature air is cooled into low-temperature air through the cooler, and the low-temperature air carries out low-temperature cooling on the power battery pack from top to bottom;
d heating mode:
when the temperature in the power battery pack box reaches a set threshold value, the battery management system all-in-one machine starts a heating mode I, at the moment, the two-position three-way electromagnetic reversing valve F and the two-position two-way electromagnetic reversing valve are electrified to form a closed internal circulation air loop, the air pump and the heater are started, internal air starts to circulate, and meanwhile, the air starts to be heated, so that the power battery pack is heated from bottom to top;
when the heating mode I is operated for a period of time, the battery management system all-in-one machine restarts the heating mode II, and at the moment, the two-position three-way electromagnetic directional valve B, the two-position three-way electromagnetic directional valve C, the two-position three-way electromagnetic directional valve D, the two-position three-way electromagnetic directional valve F and the two-position two-way electromagnetic directional valve are electrified, the air pump and the heater are started, internal air starts to circulate, and meanwhile, the air starts to be heated, and the power battery pack is heated from top to bottom.
The invention has the beneficial effects that:
1. the air thermal management system of the power battery has a plurality of temperature regulation modes, and can select corresponding modes according to different battery working conditions, so that rationalization and refinement management of the power battery are realized.
2. The air thermal management system of the power battery adopts a relatively closed air cooling mode, and compared with the traditional open cooling mode, the air thermal management system of the power battery has the advantages of more accurate temperature regulation and higher air quality.
3. The power battery air heat management system adopts a closed heating mode, so that the recycling of hot air can be realized, energy sources are saved, and heating efficiency is improved.
4. The intelligent control air heat management system is adopted, so that the automatic switching and control of multiple modes can be realized according to the temperature change in the battery box, and the intelligent control air heat management system has the advantages of being accurate in adjustment, rapid in conversion and the like.
5. The invention selects the proper air electromagnetic reversing valve, ensures that fewer parts are electrified to act as much as possible under different modes in the system, and ensures that the electricity consumption of the system is the lowest.
Drawings
FIG. 1 is a schematic diagram of the connection of the components of the air thermal management system of the present invention;
FIG. 2 is a diagram showing the operation of the air thermal management system of the present invention in a storage circulation mode;
FIG. 3 is a diagram showing the operation of the air thermal management system of the present invention in the normal temperature cooling mode I;
FIG. 4 is a diagram showing the operation of the air thermal management system of the present invention in the normal temperature cooling mode II;
FIG. 5 is a diagram showing the operation of the air thermal management system of the present invention in a low temperature cooling mode I;
FIG. 6 is a diagram illustrating the operation of the air thermal management system of the present invention in a low temperature cooling mode II;
FIG. 7 is a diagram showing the operation of the air thermal management system of the present invention in heating mode I;
FIG. 8 is a diagram showing the operation of the air thermal management system of the present invention in heating mode II;
wherein: 1. an air filter A; 2. a two-position three-way electromagnetic reversing valve A; 3. a two-position three-way electromagnetic reversing valve B; 4. the battery management system is integrated; 5. a temperature sensor; 6. a power battery box; 7. an air distribution line; 8. a two-position three-way electromagnetic reversing valve C; 9. a two-position three-way electromagnetic reversing valve D; 10. a heater; 11. an air pump; 12. a gas storage tank; 13. an air filter B; 14. a two-position three-way electromagnetic reversing valve E; 15. a cooler; 16. a two-position three-way electromagnetic reversing valve F; 17. two-position two-way electromagnetic reversing valve.
Detailed Description
The invention will now be further illustrated by way of example, but not by way of limitation, with reference to the accompanying drawings.
Example 1:
the utility model provides a pure electric vehicles power battery air thermal management system, includes air distribution pipeline 7, temperature sensor 5 and battery management system all-in-one 4 that connect power battery box 6;
one end of the air distribution pipeline 7 is sequentially connected with a heater 10, an air pump 11, an air storage tank 12, a two-position three-way electromagnetic directional valve E14, a cooler 15, a two-position three-way electromagnetic directional valve F16 and a two-position two-way electromagnetic directional valve 17, wherein the two-position three-way electromagnetic directional valve E14 is also connected with the two-position three-way electromagnetic directional valve F16 through a pipeline; the other end of the air distribution pipeline 7 is connected with a two-position three-way electromagnetic directional valve A2 and a two-position two-way electromagnetic directional valve 17;
the temperature sensor 5 is arranged in the power battery box 6 and is electrically connected with the battery management system integrated machine 4, and the battery management system integrated machine 4 is also electrically connected with the two-position three-way electromagnetic directional valve A2, the heater 10, the air pump 11, the two-position three-way electromagnetic directional valve E14, the cooler 15, the two-position three-way electromagnetic directional valve F16 and the two-position two-way electromagnetic directional valve 17 respectively.
In the embodiment, the model of the air pump is air sea FQY4816, the two-position three-way electromagnetic directional valve is a direct-acting electromagnetic valve with the model PC23-1/2T, the two-position two-way electromagnetic directional valve is a direct-acting electromagnetic valve with the model PC22-1/2T, the model of the air filter is LF-1/8-D-5M-MINI-A, the temperature sensor is a thermistor sensor with the model SA1-TH-44004-40-T, the air storage tank, the cooler and the heater are customized according to actual conditions, and the battery management system all-in-one machine is a battery management system all-in-one machine with the model QT-BCU-48T16C manufactured by Zhejiang Gao Taihao energy technology Co.
Four temperature sensors are respectively arranged at the upper side and the lower side in the power battery box 6, and one temperature sensor is arranged at the middle position. The design can comprehensively and accurately collect the temperature at each position in the battery box, provides a basis for the follow-up accurate regulation of the temperature in the battery box, and avoids the phenomenon of overlarge temperature difference in the battery box.
The upper and lower sides of the power battery box 6 are respectively provided with three interfaces, and the air distribution pipeline 7 is communicated with the power battery box 6 through the interfaces. The design has the advantages that the air distribution pipeline inputs air into the power battery box through the three inlets which are distributed in a dispersed way, then outputs the air through heat conduction through the three outlets which are distributed in a dispersed way, so that heat dissipation (heating) is prevented from being concentrated, the heat dissipation (heating) is favorably dispersed and balanced, and the design and processing cost of the power battery box body can be reduced.
In addition, the two-position two-way electromagnetic directional valve 17 is also connected with the air filter A1, and the two-position three-way electromagnetic directional valve E14 is also connected with the air filter B13. The added air filter can ensure the purity of air entering the system, and avoid the influence of impurities on the service effect and service life of the power battery.
Working principle: according to the technical scheme, the temperature sensor is used for collecting temperature data in the battery pack box, the temperature data are converted into electric signals and transmitted to the battery management system all-in-one machine, the battery management system all-in-one machine is used for judging, when a certain threshold range is reached, corresponding programs implanted in the battery management system all-in-one machine in advance are started, corresponding mechanical and electronic elements under the programs are started, operation in different working modes is achieved, and therefore the purpose of adjusting the temperature in the battery pack box is achieved, and normal operation of a power battery is guaranteed.
Example 2:
an air heat management system for a power battery of a pure electric vehicle, which has a structure as in embodiment 1 and is different in that: the air thermal management system also comprises a two-position three-way electromagnetic directional valve B3, a two-position three-way electromagnetic directional valve C8 and a two-position three-way electromagnetic directional valve D9, wherein one end of the air distribution pipeline 7 is connected with the two-position three-way electromagnetic directional valve C8 and the two-position three-way electromagnetic directional valve D9 and then connected with the heater 10; the other end of the air distribution pipeline 7 is connected with a two-position three-way electromagnetic directional valve B3 and then is connected with a two-position three-way electromagnetic directional valve A2, the two-position three-way electromagnetic directional valve C7 is also connected with the two-position three-way electromagnetic directional valve A2 through a pipeline, and the two-position three-way electromagnetic directional valve D9 is also connected with the two-position three-way electromagnetic directional valve B3 through a pipeline; the two-position three-way electromagnetic directional valve C8, the two-position three-way electromagnetic directional valve D9 and the two-position three-way electromagnetic directional valve B3 are also respectively and electrically connected with the battery management system integrated machine 4.
According to the embodiment, on the basis of the embodiment 1, the temperature adjustment of the power battery can be realized in the same mode in the two directions of air flow from bottom to top or from top to bottom, and the purpose is to enable the temperature difference of different positions inside the power battery pack to be smaller and better balanced heat dissipation.
Example 3:
the working method of the air thermal management system of the power battery of the pure electric vehicle utilizes the air thermal management system of the embodiment 2, and the specific working process comprises the following steps,
a gas storage circulation mode: (as shown in FIG. 2)
When the pure electric vehicle starts to start, the battery management system integrated machine 4 starts a gas storage circulation mode, at the moment, the two-position three-way electromagnetic reversing valve A2 is electrified, and the air pump 11 is started to circulate air;
in this mode, the toxic gas released by the battery operation in the whole system is exhausted, and at the same time, whether the whole system is unobstructed is tested, the system blockage caused by the long-time unrechanged air filter element or the internal structure fault is prevented, and the air storage tank has enough air, so that the preparation is made for the internal circulation of the system.
And B, normal temperature cooling mode:
under the ordinary working condition, the power battery of the pure electric vehicle generates lower heat, and the temperature requirement can be met by cooling the pure electric vehicle with normal-temperature air. The normal temperature cooling mode is divided into two modes, namely I and II, wherein the normal temperature cooling mode I enables hot air to enter from the lower part of the power battery pack and then to be discharged from the upper part of the power battery pack; the normal temperature cooling mode II enables hot air to enter from the upper part of the power battery pack and be discharged from the lower part of the power battery pack, so that alternate normal temperature cooling is realized.
When the temperature sensor detects that the temperature in the power battery pack box reaches a set threshold value, the battery management system all-in-one machine 4 starts a normal temperature cooling mode I (shown in fig. 3), at the moment, the two-position three-way electromagnetic reversing valve E14 is electrified, the air pump 11 is started, external air enters the system, and normal temperature cooling is carried out on the power battery pack from bottom to top;
when the normal temperature cooling mode I is operated for a period of time (the operation time can be set through programming), the battery management system integrated machine 4 restarts the normal temperature cooling mode II (shown in fig. 4), and at the moment, the two-position three-way electromagnetic directional valve B3, the two-position three-way electromagnetic directional valve C8, the two-position three-way electromagnetic directional valve D9 and the two-position three-way electromagnetic directional valve E14 are electrified, the air pump 11 is started, so that external air enters the system, and normal temperature cooling is performed on the power battery pack from top to bottom;
in the mode, the normal-temperature cooling mode I and the normal-temperature cooling mode II are adopted to be alternately carried out, so that the temperature of the power battery is finally maintained in a reasonable range, and the influence on the service effect and the service life of the power battery due to overheat temperature of the power battery and overlarge temperature difference at an inlet and an outlet in a power battery box is prevented.
C cryocooling mode:
under the heavy load working condition, the output power of the power battery of the pure electric vehicle is increased, the self-heating is serious, the normal-temperature air cooling can not meet the heat dissipation requirement, and a low-temperature cooling mode is needed at this time. The low-temperature cooling mode is divided into two modes, namely I and II, wherein the low-temperature cooling mode I enables hot air to enter from the lower part of the power battery pack and be discharged from the upper part of the power battery pack; the low-temperature cooling mode II enables hot air to enter from the upper part of the power battery pack and be discharged from the lower part of the power battery pack, so that alternating low-temperature cooling is realized.
When the temperature sensor detects that the temperature in the power battery pack box reaches a set threshold value, the battery management system all-in-one machine 4 starts a low-temperature cooling mode I (shown in fig. 5), at the moment, the two-position three-way electromagnetic reversing valve A2 is electrified, the air pump 11 and the cooler 15 are started, external normal-temperature air is cooled into low-temperature air through the cooler 15, and the low-temperature air carries out low-temperature cooling on the power battery pack from bottom to top through the air pump 11;
when the low-temperature cooling mode I is operated for a period of time (the operation time can be set through programming), the battery management system integrated machine 4 restarts the low-temperature cooling mode II (as shown in fig. 6), at the moment, the two-position three-way electromagnetic directional valve A2, the two-position three-way electromagnetic directional valve B3, the two-position three-way electromagnetic directional valve C8 and the two-position three-way electromagnetic directional valve D9 are electrified, the air pump 11 and the cooler 15 are started, external normal-temperature air is cooled into low-temperature air through the cooler 15, and the low-temperature air carries out low-temperature cooling on the power battery pack from top to bottom through the air pump 11;
in the mode, the low-temperature cooling mode I and the low-temperature cooling mode II are adopted to be alternately carried out, so that the temperature of the power battery is finally maintained in a reasonable range, and the influence on the service effect and the service life of the power battery due to overheat temperature of the power battery and overlarge temperature difference at an inlet and an outlet in a power battery box is prevented.
D heating mode:
in north of China, the temperature in winter can reach minus thirty ℃ to ensure that the power battery cannot work normally, and the popularization of the pure electric automobile is limited. Therefore, the power battery needs to be heated to enable the power battery to work within a reasonable temperature range, so that the power battery can work normally in cold regions.
The heating mode belongs to internal circulation heating, can better heat the internal air, enables the hot air to be recycled, improves the heating speed, and reduces the energy consumption of the battery in the aspect. The heating mode is divided into two modes, namely I and II, wherein the heating mode I enables hot air to enter from the lower part of the power battery pack and be discharged from the upper part of the power battery pack; the heating mode II enables hot air to enter from the upper part of the power battery pack and be discharged from the lower part of the power battery pack, so that alternating heating is realized.
When the temperature sensor detects that the temperature in the power battery pack box reaches a set threshold value, the battery management system all-in-one machine 4 starts a heating mode I (shown in fig. 7), and at the moment, the two-position three-way electromagnetic reversing valve F16 and the two-position two-way electromagnetic reversing valve 17 are electrified to form a closed internal circulation air loop, the air pump 11 and the heater 10 are started, internal air starts to circulate, and meanwhile, the air starts to be heated, so that the power battery pack is heated from bottom to top;
when the heating mode i is operated for a period of time (the operation time can be set by programming), the battery management system integrated machine 4 restarts the heating mode ii (as shown in fig. 8), and at this time, the two-position three-way electromagnetic directional valve B3, the two-position three-way electromagnetic directional valve C8, the two-position three-way electromagnetic directional valve D9, the two-position three-way electromagnetic directional valve F16, the two-position two-way electromagnetic directional valve 17 are electrified, the air pump 11 and the heater 10 are started, the internal air starts to circulate, and at the same time, the air starts to be heated, and the power battery pack is heated from top to bottom.
Under the mode, the heating mode I and the heating mode II are alternately adopted, so that the temperature of the power battery is finally maintained in a reasonable range, and the influence on the service effect and the service life of the power battery caused by supercooling of the temperature of the power battery and overlarge temperature difference at the inlet and outlet in the power battery box is prevented.
Claims (4)
1. The air heat management system for the power battery of the pure electric vehicle is characterized by comprising an air distribution pipeline, a temperature sensor and a battery management system all-in-one machine, wherein the air distribution pipeline is connected with a power battery box;
one end of the air distribution pipeline is sequentially connected with a heater, an air pump, an air storage tank, a two-position three-way electromagnetic directional valve E, a cooler, a two-position three-way electromagnetic directional valve F and a two-position two-way electromagnetic directional valve, wherein the two-position three-way electromagnetic directional valve E is also connected with the two-position three-way electromagnetic directional valve F through a pipeline; the other end of the air distribution pipeline is sequentially connected with a two-position three-way electromagnetic reversing valve A and a two-position two-way electromagnetic reversing valve;
the temperature sensor is arranged in the power battery pack box and is in integral electromechanical connection with the battery management system, and the battery management system integral machine is also respectively and electrically connected with the two-position three-way electromagnetic directional valve A, the heater, the air pump, the two-position three-way electromagnetic directional valve E, the cooler, the two-position three-way electromagnetic directional valve F and the two-position two-way electromagnetic directional valve;
the two-position two-way electromagnetic reversing valve is also connected with an air filter A;
the two-position three-way electromagnetic reversing valve E is also connected with an air filter B.
2. The air thermal management system of the power battery of the pure electric vehicle according to claim 1, wherein the air thermal management system further comprises a two-position three-way electromagnetic directional valve C, a two-position three-way electromagnetic directional valve D and a two-position three-way electromagnetic directional valve B; one end of the air distribution pipeline is connected with a two-position three-way electromagnetic directional valve C and a two-position three-way electromagnetic directional valve D through a pipeline, then is connected with a heater, and the other end of the air distribution pipeline is connected with a two-position three-way electromagnetic directional valve A through a pipeline after being connected with a two-position three-way electromagnetic directional valve B; the two-position three-way electromagnetic directional valve C, the two-position three-way electromagnetic directional valve D and the two-position three-way electromagnetic directional valve B are also respectively and integrally and mechanically connected with the battery management system.
3. The air thermal management system for the power battery of the pure electric vehicle according to claim 1, wherein three interfaces are respectively arranged on the upper side and the lower side of the power battery box, and the air distribution pipeline is communicated with the power battery box through the interfaces.
4. A method for operating an air thermal management system for a power cell of a pure electric vehicle according to any one of the claim 1-3, comprising the steps of,
a gas storage circulation mode:
when the pure electric vehicle starts to start, the battery management system all-in-one machine starts a gas storage circulation mode, at the moment, the two-position three-way electromagnetic reversing valve A is electrified, and the air pump is started to circulate air;
and B, normal temperature cooling mode:
when the temperature in the power battery pack box reaches a set threshold value, the battery management system all-in-one machine starts a normal temperature cooling mode I, at the moment, the two-position three-way electromagnetic reversing valve E is electrified, the air pump is started, external air enters the system, and normal temperature cooling is carried out on the power battery pack from bottom to top;
when the normal temperature cooling mode I is operated for a period of time, the battery management system integrated machine restarts the normal temperature cooling mode II, and at the moment, the two-position three-way electromagnetic directional valve B, the two-position three-way electromagnetic directional valve C, the two-position three-way electromagnetic directional valve D and the two-position three-way electromagnetic directional valve E are electrified, the air pump is started, so that external air enters the system, and normal temperature cooling is performed on the power battery pack from top to bottom;
c low temperature cooling mode:
when the temperature in the power battery pack box reaches a set threshold value, the battery management system all-in-one machine starts a low-temperature cooling mode I, at the moment, the two-position three-way electromagnetic reversing valve A is electrified, the air pump and the cooler are started, external normal-temperature air is cooled into low-temperature air through the cooler, and the low-temperature air carries out low-temperature cooling on the power battery pack from bottom to top;
when the low-temperature cooling mode I is operated for a period of time, the battery management system all-in-one machine restarts the low-temperature cooling mode II, at the moment, the two-position three-way electromagnetic directional valve A, the two-position three-way electromagnetic directional valve B, the two-position three-way electromagnetic directional valve C and the two-position three-way electromagnetic directional valve D are electrified, the air pump and the cooler are started, external normal-temperature air is cooled into low-temperature air through the cooler, and the low-temperature air carries out low-temperature cooling on the power battery pack from top to bottom;
d heating mode:
when the temperature in the power battery pack box reaches a set threshold value, the battery management system all-in-one machine starts a heating mode I, at the moment, the two-position three-way electromagnetic reversing valve F and the two-position two-way electromagnetic reversing valve are electrified to form a closed internal circulation air loop, the air pump and the heater are started, internal air starts to circulate, and meanwhile, the air starts to be heated, so that the power battery pack is heated from bottom to top;
when the heating mode I is operated for a period of time, the battery management system all-in-one machine restarts the heating mode II, and at the moment, the two-position three-way electromagnetic directional valve B, the two-position three-way electromagnetic directional valve C, the two-position three-way electromagnetic directional valve D, the two-position three-way electromagnetic directional valve F and the two-position two-way electromagnetic directional valve are electrified, the air pump and the heater are started, internal air starts to circulate, and meanwhile, the air starts to be heated, and the power battery pack is heated from top to bottom.
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| CN109037853B (en) * | 2018-10-29 | 2023-04-21 | 重庆科技学院 | Temperature management system for power battery of electric automobile |
| CN109638381B (en) * | 2018-12-14 | 2023-12-26 | 华南理工大学 | High-efficient integrated initiative thermal management system of electric automobile |
| KR102647197B1 (en) * | 2019-03-18 | 2024-03-13 | 현대자동차주식회사 | System and method of managing battery of vehicle |
| CN110808435B (en) * | 2019-11-20 | 2020-08-25 | 江苏华鹏智能仪表科技股份有限公司 | New energy automobile battery performance promotes protector |
| CN111180830B (en) * | 2020-01-21 | 2021-03-30 | 合肥工业大学 | Battery motor integrated thermal management system of pure electric or hybrid electric vehicle |
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