CN112768803B - Air-cooled battery thermal management method - Google Patents
Air-cooled battery thermal management method Download PDFInfo
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- CN112768803B CN112768803B CN202110003299.6A CN202110003299A CN112768803B CN 112768803 B CN112768803 B CN 112768803B CN 202110003299 A CN202110003299 A CN 202110003299A CN 112768803 B CN112768803 B CN 112768803B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- 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
- H01M10/61—Types of temperature control
- H01M10/613—Cooling or keeping cold
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- 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
- H01M10/61—Types of temperature control
- H01M10/615—Heating or keeping warm
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- 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
- H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
- H01M10/625—Vehicles
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- 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
- H01M10/63—Control systems
- H01M10/635—Control systems based on ambient temperature
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- 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
- H01M10/6561—Gases
- H01M10/6563—Gases with forced flow, e.g. by blowers
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- 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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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Automation & Control Theory (AREA)
- Secondary Cells (AREA)
Abstract
The application provides a battery thermal management system and a battery thermal management method, wherein the system comprises an air conditioning system, an air duct and a negative pressure fan air-cooled battery. The air conditioning system comprises a heating mechanism, a refrigerating mechanism and an air outlet pipeline, wherein one end of the air outlet pipeline is respectively connected with the heating mechanism and the refrigerating mechanism; the air duct is communicated with the other end of the air outlet pipeline; the negative pressure fan and the air channel are respectively arranged on two sides of the air-cooled battery, when the negative pressure fan is started, power can be provided so as to accelerate the air outlet speed of the air channel, the air flow rate is increased, forced cooling or heating of the battery is realized, the cooling or heating efficiency of the battery is improved, and the requirements of a battery thermal management system are met.
Description
Technical Field
The application relates to the technical field of power battery thermal management, in particular to an air-cooled battery thermal management method.
Background
When a new power battery is mounted on a new energy vehicle such as a pure electric vehicle, a fuel cell vehicle, a range extender vehicle and the like, the cooling and heating effects of the battery need to be considered, and modes such as indirect water cooling/heating, direct air cooling, direct cooling by a refrigerant and the like are generally adopted. When a water cooling system is adopted, accessories such as a water pump, a radiator, a PTC (positive temperature coefficient) and the like need to be considered, the system is complex in arrangement, and the manufacturing cost is high; when the traditional direct air cooling is adopted, the ambient air temperature can not meet the requirements of heat dissipation and heating of the battery along with the increase of the power density of the battery; the battery cooling system needs to be upgraded because the system complexity and the manufacturing cost are higher due to the adoption of the refrigerant for direct cooling.
Disclosure of Invention
An object of the present application is to provide a battery thermal management system and method, so as to solve the above problems in the prior art, improve the cooling and heating efficiency of the battery, and meet the requirements of the battery thermal management system.
A first aspect of the present application provides a battery thermal management system, comprising:
the air conditioning system comprises a heating mechanism, a refrigerating mechanism and an air outlet pipeline, wherein one end of the air outlet pipeline is respectively connected with the heating mechanism and the refrigerating mechanism;
the air duct is communicated with the other end of the air outlet pipeline;
an air-cooled battery;
and the negative pressure fan and the air channel are respectively arranged on two sides of the air-cooled battery.
In one possible implementation, the heating mechanism is a warm air core, and the cooling mechanism is an evaporator.
In a possible implementation manner, the air conditioning system further comprises a water pump and an expansion water tank, the water outlet of the warm air core is communicated with the water inlet of the expansion water tank, the water outlet of the expansion water tank is communicated with the water inlet of the water pump, and the water outlet of the water pump is communicated with the water inlet of the warm air core.
In one possible implementation, the air conditioning system further includes a compressor and a condenser, an outlet of the evaporator is communicated with an inlet of the compressor, an outlet of the compressor is communicated with an inlet of the condenser, and an outlet of the condenser is communicated with an inlet of the evaporator.
In a possible implementation, a shut-off valve is provided between the evaporator and the condenser.
In a possible implementation manner, heat dissipation fins are arranged in both the air duct and the air outlet pipeline.
The second aspect of the present application further provides a battery thermal management method, where the battery thermal management system provided in the first aspect of the present application is adopted, including the following steps:
detecting whether the ambient temperature outside the vehicle is a first temperature threshold value;
if yes, starting a negative pressure fan and an air conditioning system to input hot air to the air-cooled battery through a heating mechanism and the air outlet pipeline, and controlling the temperature of the battery to be a first battery temperature threshold value;
if not, detecting whether the temperature of the environment outside the vehicle is a second temperature threshold value, wherein the second temperature threshold value is larger than the first temperature threshold value;
if yes, starting the negative pressure fan, and controlling the temperature of the battery to be a second battery temperature threshold value;
if not, detecting whether the temperature of the environment outside the vehicle is a third temperature threshold value, wherein the third temperature threshold value is larger than the second temperature threshold value;
if so, starting the negative pressure fan and the air conditioning system to input cold air to the air-cooled battery through the refrigeration mechanism and the air outlet pipeline, and controlling the temperature of the battery to be a third battery temperature threshold value.
In one possible implementation, the first temperature threshold is greater than or equal to-40 ℃ and less than 0 ℃.
In one possible implementation, the second temperature threshold is greater than or equal to 0 ℃ and less than 30 ℃.
In one possible implementation, the third temperature threshold is greater than or equal to 30 ℃ and less than 40 ℃.
The technical scheme provided by the application can achieve the following beneficial effects:
the battery thermal management system and the battery thermal management method realize forced cooling or heating of the battery, improve cooling or heating efficiency of the battery, and meet requirements of the battery thermal management system.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.
Drawings
Fig. 1 is a schematic structural diagram of a battery thermal management system according to an embodiment of the present disclosure;
fig. 2 is a flowchart of a battery management method according to an embodiment of the present disclosure.
Reference numerals:
1-a warm air core body;
2-an evaporator;
3-an air outlet pipeline;
4-an air duct;
5-negative pressure fan;
6-air cooling the battery;
7-a water pump;
8-an expansion water tank;
9-a compressor;
10-a condenser;
11-stop valve.
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and together with the description, serve to explain the principles of the application.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
In the description of the present application, unless explicitly stated or limited otherwise, the terms "first", "second", and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more unless specified or indicated otherwise; the terms "connected," "fixed," and the like are to be construed broadly and may, for example, be fixedly connected, detachably connected, integrally connected, or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the description of the present application, it should be understood that the terms "upper" and "lower" used in the description of the embodiments of the present application are used in a descriptive sense only and not for purposes of limitation. In addition, in this context, it will also be understood that when an element is referred to as being "on" or "under" another element, it can be directly on "or" under "the other element or be indirectly on" or "under" the other element via an intermediate element.
As shown in fig. 1, the present embodiment provides an air-cooled battery 6 thermal management system, which includes an air conditioning system, an air duct 4, a negative pressure fan 5, and an air-cooled battery 6. The air conditioning system comprises a heating mechanism, a refrigerating mechanism and an air outlet pipeline 3, wherein one end of the air outlet pipeline 3 is respectively connected with the heating mechanism and the refrigerating mechanism; the air duct 4 is communicated with the other end of the air outlet pipeline 3; the negative pressure fan 5 and the air duct 4 of the air-cooled battery 6 are respectively arranged at two sides of the air-cooled battery 6, when the negative pressure fan 5 is started, power can be provided so as to accelerate the air outlet speed of the air duct 4, the air flow rate is increased, the forced cooling or heating of the air-cooled battery 6 is realized, the cooling or heating efficiency of the air-cooled battery 6 is improved, and the requirement of a heat management system of the air-cooled battery 6 is met. The negative pressure fan 5 may be disposed on any side of the air-cooled battery 6.
As a specific implementation manner, the heating mechanism is a warm air core 1, and the refrigerating mechanism is an evaporator 2. The warm air core 1 can heat the surrounding space, so that hot air can be input into the air outlet pipeline 3, and the air-cooled battery 6 can be heated. The evaporator 2 can convert the liquid substance into a gaseous state to reduce the air temperature, so that cold air can be conveniently input into the air outlet pipeline 3, and the air-cooled battery 6 can be cooled.
As a specific implementation manner, the air conditioning system further comprises a water pump 7 and an expansion water tank 8, the water outlet of the warm air core 1 is communicated with the water inlet of the expansion water tank 8, the water outlet of the expansion water tank 8 is communicated with the water inlet of the water pump 7, and the water outlet of the water pump 7 is communicated with the water inlet of the warm air core 1.
Wherein, the water pump 7, the expansion tank 8 and the warm air core body 1 can form a heating loop. Wherein, because the effect of expend with heat and contract with cold of system water, when hot water intensifies, the water volume in the system increases, when this partial expansion volume of no department holding water, the water pressure in the system increases, will influence normal operating. The expansion water tank 8 is used for accommodating the water expansion amount of the system, the water pressure fluctuation of the system caused by the expansion of water can be reduced, the safety and the reliability of the operation of the system are improved, and when the system leaks water or the system is cooled due to some reason, the water level of the expansion water tank 8 is lowered to supplement water for the system. The expansion tank 8 also serves to stabilize the pressure of the system and to exclude air released by the water during heating.
As a specific implementation, the air conditioning system further comprises a compressor 9 and a condenser 10, an outlet of the evaporator 2 is communicated with an inlet of the compressor 9, an outlet of the compressor 9 is communicated with an inlet of the condenser 10, and an outlet of the condenser 10 is communicated with an inlet of the evaporator 2. Wherein the evaporator 2, the compressor 9 and the condenser 10 constitute a refrigeration circuit.
As a specific implementation, a stop valve 11 is provided between the evaporator 2 and the condenser 10 to facilitate the conduction or the interruption of the cooling water.
As a specific implementation manner, in order to improve the heat dissipation effect, heat dissipation fins are disposed in both the air duct 4 and the air outlet pipe 3.
As shown in fig. 2, an embodiment of the present application further provides a battery thermal management method, which uses the air-cooled battery 6 thermal management system provided in any embodiment of the present application, and the method includes the following steps:
step S1, detecting whether the battery temperature is a first temperature threshold value; if yes, go to step S2; if not, the flow proceeds to step S3.
Wherein the first temperature threshold may be greater than or equal to-20 ℃ and less than 10 ℃. I.e. in cold winter, the air-cooled battery 6 may be heated by the air-cooled battery 6 thermal management system.
And step S2, starting the negative pressure fan 5 and the air conditioning system to input hot air to the air-cooled battery 6 through the heating mechanism and the air outlet pipeline 3, and controlling the temperature of the air-cooled battery 6 to be a first battery temperature threshold value.
The heating mechanism can heat air and input the air into the air-cooled battery 6 through the air outlet pipeline 3, so that the temperature of the air-cooled battery 6 is maintained at a first battery temperature threshold, and the first battery temperature threshold can be 20-40 ℃.
Step S3, detecting whether the battery temperature is a second temperature threshold value, wherein the second temperature threshold value is larger than the first temperature threshold value; if yes, go to step S4; if not, the flow proceeds to step S5.
Wherein the second temperature threshold may be greater than or equal to 20 ℃ and less than 30 ℃. In spring or autumn, the climate temperature is appropriate, and the air-cooled battery 6 can be ensured to normally work by keeping the temperature of the air-cooled battery 6 at a temperature level equivalent to the ambient temperature without starting an air conditioning system.
And step S4, starting the negative pressure fan 5, and controlling the temperature of the air-cooled battery 6 to be the second battery temperature threshold.
Wherein the second battery temperature threshold may be 20 ℃ to 30 ℃.
Step S5, detecting whether the battery temperature is a third temperature threshold value, wherein the third temperature threshold value is larger than the second temperature threshold value; if so, the process proceeds to step S6.
Wherein the third temperature threshold may be greater than or equal to 45 ℃. I.e. in hot summer, where the climate temperature is high, the temperature of the air-cooled battery 6 can be lowered by the air conditioning system.
And step S6, starting the negative pressure fan 5 and the air conditioning system to input cold air to the air-cooled battery 6 through the refrigeration mechanism and the air outlet pipeline 3, and controlling the temperature of the air-cooled battery 6 to be a third battery temperature threshold value.
Wherein the third battery temperature threshold may be 20 ℃ to 40 ℃.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (4)
1. The air-cooled battery (6) thermal management method is characterized in that an air-cooled battery thermal management system is adopted, and the air-cooled battery (6) thermal management system comprises the following steps:
the air conditioning system comprises a heating mechanism, a refrigerating mechanism and an air outlet pipeline (3), wherein one end of the air outlet pipeline (3) is connected with the heating mechanism and the refrigerating mechanism respectively;
the air duct (4) is communicated with the other end of the air outlet pipeline (3);
an air-cooled battery (6);
the negative pressure fan (5), the negative pressure fan (5) and the air duct (4) are respectively arranged on two sides of the air-cooled battery (6);
the heating mechanism is a warm air core body (1), and the refrigerating mechanism is an evaporator (2);
the air conditioning system further comprises a water pump (7) and an expansion water tank (8), wherein a water outlet of the warm air core body (1) is communicated with a water inlet of the expansion water tank (8), a water outlet of the expansion water tank (8) is communicated with a water inlet of the water pump (7), and a water outlet of the water pump (7) is communicated with a water inlet of the warm air core body (1);
the air conditioning system further comprises a compressor (9) and a condenser (10), an outlet of the evaporator (2) is communicated with an inlet of the compressor (9), an outlet of the compressor (9) is communicated with an inlet of the condenser (10), and an outlet of the condenser (10) is communicated with an inlet of the evaporator (2);
a stop valve (11) is arranged between the evaporator (2) and the condenser (10);
radiating fins are arranged in the air duct (4) and the air outlet pipeline (3);
the air-cooled battery (6) heat management method comprises the following steps:
detecting whether the ambient temperature outside the vehicle is a first temperature threshold value;
if yes, starting a negative pressure fan (5) and an air conditioning system to input hot air to the air-cooled battery (6) through a heating mechanism and the air outlet pipeline (3), and controlling the temperature of the air-cooled battery (6) to be a first air-cooled battery (6) temperature threshold value;
if not, detecting whether the temperature of the environment outside the vehicle is a second temperature threshold value, wherein the second temperature threshold value is larger than the first temperature threshold value;
if yes, starting the negative pressure fan (5), and controlling the temperature of the air-cooled battery (6) to be a second air-cooled battery (6) temperature threshold value;
if not, detecting whether the temperature of the environment outside the vehicle is a third temperature threshold value, wherein the third temperature threshold value is larger than the second temperature threshold value;
if so, starting the negative pressure fan (5) and the air conditioning system to input cold air to the air-cooled battery (6) through the refrigeration mechanism and the air outlet pipeline (3), and controlling the temperature of the air-cooled battery (6) to be a temperature threshold of the third air-cooled battery (6).
2. The air-cooled battery (6) thermal management method according to claim 1, characterized in that the first temperature threshold is greater than or equal to-20 ℃ and less than 10 ℃.
3. The air-cooled battery (6) thermal management method according to claim 1, characterized in that the second temperature threshold is greater than or equal to 20 ℃ and less than 30 ℃.
4. The air-cooled battery (6) thermal management method according to claim 1, characterized in that the third temperature threshold is greater than or equal to 45 ℃.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110003299.6A CN112768803B (en) | 2021-01-04 | 2021-01-04 | Air-cooled battery thermal management method |
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| CN202110003299.6A CN112768803B (en) | 2021-01-04 | 2021-01-04 | Air-cooled battery thermal management method |
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| CN112768803B true CN112768803B (en) | 2022-03-29 |
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