CN118173945B - Optimizing method for carrying out thermal management on new energy battery - Google Patents
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- 238000000034 method Methods 0.000 title claims abstract description 39
- 238000010438 heat treatment Methods 0.000 claims abstract description 32
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims abstract description 23
- 229910052744 lithium Inorganic materials 0.000 claims abstract description 23
- 238000005057 refrigeration Methods 0.000 claims abstract description 21
- 238000005457 optimization Methods 0.000 claims abstract description 6
- 230000001105 regulatory effect Effects 0.000 claims abstract description 6
- 230000000087 stabilizing effect Effects 0.000 claims abstract description 3
- 238000004220 aggregation Methods 0.000 claims description 24
- 230000002776 aggregation Effects 0.000 claims description 24
- 230000001276 controlling effect Effects 0.000 claims description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000009826 distribution Methods 0.000 description 3
- 230000033228 biological regulation Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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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
- H01M10/633—Control systems characterised by algorithms, flow charts, software details or the like
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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
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
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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
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
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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
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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
- H01M10/657—Means for temperature control structurally associated with the cells by electric or electromagnetic means
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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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Abstract
The invention relates to an optimization method for carrying out thermal management on a new energy battery, which belongs to the technical field of power batteries and comprises the following steps: step 1): a refrigeration loop and a heating loop are arranged in the lithium battery; step 2): collecting the temperature of the heat exchanger, and collecting the temperature of the heat exchanger by using an AI intelligent method; step 3): judging the temperature of the collected heat exchanger by using a temperature difference method; step 4): regulating the temperature of the heat exchanger by using a temperature stabilizing method to ensure that the temperature of the heat exchanger is kept within the range of a temperature threshold; the invention has the beneficial effects that: the efficiency of energy coordination and utilization of lithium batteries is improved.
Description
Technical Field
The invention belongs to the technical field of power batteries, and particularly relates to an optimization method for thermal management of a new energy battery, which is specifically used for a power lithium battery.
Background
New energy is considered as an energy source for reducing petroleum consumption, low pollution and low noise, and is an important way to solve energy crisis and environmental deterioration. The new energy replaces the traditional non-renewable energy, effectively improves the fuel economy, reduces the emission, and is considered as one of the effective paths of energy conservation and emission reduction.
Development of novel energy sources (wind energy, electric energy, water energy, ocean energy, solar energy and the like) as important components of energy strategy, but the electric energy technology represented by lithium batteries improves application of the novel energy sources, so that preparation of the lithium batteries for safe use is an important point of development of the current lithium battery industry.
In the current electric lithium battery, a battery management system performs battery thermal management for a battery module, and performs overall thermal management for the temperature within a new energy lithium battery. The battery thermal management and the whole thermal management have independent refrigeration and heating functions respectively. In the prior art, two sets of systems, namely refrigeration and heating, exist in an electric battery system, which is unfavorable for coordination and utilization of electric energy, so that the utilization efficiency of the energy of a lithium battery is low.
Disclosure of Invention
The invention aims to solve the technical problem that the energy coordination and utilization efficiency of a lithium battery is not high, and provides an optimization method for carrying out heat management on a new energy battery.
In order to achieve the above purpose, the present invention is realized by the following technical scheme:
An optimizing method for carrying out thermal management on a new energy battery comprises the following steps:
Step 1): a refrigeration loop and a heating loop are arranged in the lithium battery; wherein, a heat exchanger is arranged between the refrigerating loop and the heating loop, and the heat exchanger is used for circularly controlling the refrigerating and heating of the lithium battery;
step 2): collecting the temperature of the heat exchanger, and collecting the temperature of the heat exchanger by using an AI intelligent method;
Step 3): judging the temperature of the collected heat exchanger by using a temperature difference method; wherein the heat exchanger generates refrigeration if the temperature of the heat exchanger is higher than a set temperature threshold, and generates heating if the temperature of the heat exchanger is lower than the set temperature threshold;
step 4): the temperature of the heat exchanger is regulated by a temperature stabilization method, so that the temperature of the heat exchanger is kept within the range of the temperature threshold.
Optionally, in step 1), the heat exchanger cycle controls cooling and heating of the lithium battery, and the following steps are adopted:
Step 11): connecting the upper surface of the heat exchanger to the refrigerating circuit through a circuit, connecting the lower surface of the heat exchanger to the heating circuit through a circuit, keeping the temperature of the upper surface of the heat exchanger not higher than 10 ℃, keeping the temperature of the lower surface of the heat exchanger not lower than-10 ℃, and measuring the temperatures of the upper surface and the lower surface of the heat exchanger;
Step 12): if the temperature of the upper surface of the heat exchanger is higher than 10 ℃, starting a refrigeration circuit connected with the upper surface of the heat exchanger to reduce the temperature of the upper surface of the heat exchanger; if the temperature of the lower surface of the heat exchanger is lower than-10 ℃, starting a heating circuit connected with the lower surface of the heat exchanger to raise the temperature of the lower surface of the heat exchanger;
step 13): measuring a temperature difference between the upper surface and the lower surface of the heat exchanger, and if the temperature difference between the upper surface and the lower surface of the heat exchanger is in the range of 0-3 ℃, not starting the operation of the refrigeration circuit and the heating circuit; if the temperature difference between the upper surface of the heat exchanger and the lower surface of the heat exchanger exceeds the range of 0-3 c, the refrigeration circuit and the heating circuit are simultaneously activated such that the temperature difference between the upper surface of the heat exchanger and the lower surface of the heat exchanger is in the range of 0-3 c.
Optionally, in step 13), the temperature difference between the upper surface and the lower surface of the heat exchanger is calculated using the following formula (1):
(1)；
Wherein, Is the area of the electrical vortex at the upper surface of the heat exchanger,For the conductivity of the heat exchanger,Is the normal operating temperature of the upper surface of the heat exchanger,Is the temperature of the heat exchanger after the upper surface temperature is raised,For the relative comparison of the elevated temperature of the upper surface of the heat exchanger and the normal operating temperature of the upper surface of the heat exchanger, exp (·) is a calculated function of the relative ratio;
is the area of the electrical vortex at the lower surface of the heat exchanger, Is the normal operating temperature of the lower surface of the heat exchanger,Is the temperature of the lower surface of the heat exchanger after the temperature is reduced,A reduced temperature for the lower surface of the heat exchanger relative to a normal operating temperature for the lower surface of the heat exchanger;
[ ] is a function of calculating the current temperature of the upper surface of the heat exchanger or a function of calculating the current temperature of the lower surface of the heat exchanger, As a function of the absolute value of the function,Is the temperature difference between the upper and lower surfaces of the heat exchanger,Positive values.
Further, the current vortex area of the upper surface of the heat exchanger is calculated as formula (2); the area of the electric vortex of the lower surface of the heat exchanger is calculated as formula (3):
(2)；
(3)；
in the formula (2) of the present invention, I is the number of the eddy currents on the upper surface of the heat exchanger, N is the total number of the eddy currents on the upper surface of the heat exchanger,Is the aggregation of the eddy currents on the upper surface of the heat exchanger,Is the current that a certain eddy current of the upper surface of the heat exchanger has,Is the aggregation of the current possessed by the eddy current of the upper surface of the heat exchanger,For the aggregation of the electric vortex of the upper surface of the heat exchanger, corresponding to the aggregation of the electric current of the electric vortex of the upper surface of the heat exchanger, making the number of the electric vortex of the upper surface of the heat exchanger equal to the number of the electric current of the electric vortex of the upper surface of the heat exchanger;
In the formula (3) of the present invention, For a certain eddy current of the lower surface of the heat exchanger, q is the number of eddy currents of the lower surface of the heat exchanger, K is the total number of eddy currents of the lower surface of the heat exchanger,Is the aggregation of the eddy currents of the lower surface of the heat exchanger,Is the current that a certain eddy current of the lower surface of the heat exchanger has,Is the aggregation of the current possessed by the eddy current of the lower surface of the heat exchanger,The aggregation of the electric vortex of the lower surface of the heat exchanger corresponds to the aggregation of the electric current of the electric vortex of the lower surface of the heat exchanger, so that the number of the electric vortex of the lower surface of the heat exchanger is equal to the number of the electric current of the electric vortex of the lower surface of the heat exchanger.
Optionally, in step 2), the temperature of the heat exchanger is collected by using the AI intelligent method, and the following formula (4) is adopted:
(4)；
Wherein, For the temperature acquired by the heat exchanger at time j,The temperature of the heat exchanger at time j, j being a time,Is the resistance temperature of the heat exchanger at time j,Is the temperature ratio of the temperature of the heat exchanger at time j to the temperature of the heat exchanger at time j +1,As a function of the absolute value of the function,Take a positive value.
Optionally, in step 3), the temperature difference method is used to determine the collected temperature of the heat exchanger, and the following formula (5) is adopted:
(5)；
where a is the temperature difference between the upper and lower surfaces of the heat exchanger, Is the unit area of the upper surface of the heat exchanger,Is the number of the unit areas of the upper surface of the heat exchanger,Is the unit area of the lower surface of the heat exchanger,Is the number of the unit areas of the lower surface of the heat exchanger,Is the thermal conductivity between the upper and lower surfaces of the heat exchanger,Is the thickness between the upper and lower surfaces of the heat exchanger,As a function of absolute value.
Further, the calculation of the thermal conductivity coefficient between the upper surface and the lower surface of the heat exchanger adopts formula (6):
(6)；
Wherein, Is the heat conduction vector of the upper surface of the heat exchanger toward the lower surface of the heat exchanger or the heat conduction vector of the lower surface of the heat exchanger toward the upper surface of the heat exchanger,Is the heat conduction temperature per unit thickness between the upper and lower surfaces of the heat exchanger,Is the rated heat conducting temperature of the heat exchanger.
Optionally, in step 4), the calculation of the temperature plateau method is formula (7):
(7)；
Wherein, As a result of the temperature threshold value in question,For the operating temperature of the heat exchanger,As a temperature correction factor, a temperature correction factor is used,Is the operating temperature coefficient of the heat exchanger,Is the rated heat conduction temperature coefficient of the heat exchanger,Is the rated heat conducting temperature of the heat exchanger.
Optionally, in step 4), the adjustment of the temperature threshold of the heat exchanger is performed by:
step 41): detecting the temperature of the upper surface and the temperature of the lower surface of the heat exchanger;
Step 42): the temperature of the upper surface and the temperature of the lower surface of the heat exchanger are adjusted to be equal temperatures, and the temperature of the upper surface and the temperature of the lower surface of the heat exchanger are within a range of temperature thresholds.
The invention has the beneficial effects that:
The temperature difference method is used for judging the temperature of the collected heat exchanger, if the temperature of the heat exchanger is higher than the set temperature threshold, the heat exchanger generates refrigeration, if the temperature of the heat exchanger is lower than the set temperature threshold, the heat exchanger generates heating, the temperature of the heat exchanger is regulated by the temperature stabilizing method, the temperature of the heat exchanger is kept within the range of the temperature threshold, and the energy coordination and utilization efficiency of the lithium battery are improved.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic workflow diagram of the present invention;
fig. 2 is a schematic diagram of the structural operation of the heat exchanger of the present invention.
Icon: 1-a heat exchanger; 2-eddy current.
Detailed Description
Embodiments of the present application will be described in detail below with reference to the accompanying drawings.
Example 1:
As shown in fig. 1, the present embodiment provides an optimization method for performing thermal management on a new energy battery, including the following steps:
Step 1): a refrigeration loop and a heating loop are arranged in the lithium battery; wherein, a heat exchanger is arranged between the refrigerating loop and the heating loop, and the heat exchanger is used for circularly controlling the refrigerating and heating of the lithium battery;
step 2): collecting the temperature of the heat exchanger, and collecting the temperature of the heat exchanger by using an AI intelligent method;
Step 3): judging the temperature of the collected heat exchanger by using a temperature difference method; wherein the heat exchanger generates refrigeration if the temperature of the heat exchanger is above a set temperature threshold (±3 ℃ range), and generates heating if the temperature of the heat exchanger is below the set temperature threshold;
step 4): the temperature of the heat exchanger is regulated by a temperature stabilization method, so that the temperature of the heat exchanger is kept within the range of the temperature threshold.
Specifically, in step 1), the heat exchanger cycle controls the cooling and heating of the lithium battery, and the following steps are adopted:
Step 11): connecting the upper surface of the heat exchanger to a refrigerating circuit through a circuit, connecting the lower surface of the heat exchanger to a heating circuit through a circuit, keeping the temperature of the upper surface of the heat exchanger not higher than 10 ℃, keeping the temperature of the lower surface of the heat exchanger not lower than-10 ℃, and measuring the temperatures of the upper surface and the lower surface of the heat exchanger;
Step 12): if the temperature of the upper surface of the heat exchanger is higher than 10 ℃, starting a refrigeration circuit connected with the upper surface of the heat exchanger to reduce the temperature of the upper surface of the heat exchanger; if the temperature of the lower surface of the heat exchanger is lower than-10 ℃, starting a heating circuit connected with the lower surface of the heat exchanger to raise the temperature of the lower surface of the heat exchanger;
step 13): measuring a temperature difference between the upper surface and the lower surface of the heat exchanger, and if the temperature difference between the upper surface and the lower surface of the heat exchanger is in the range of 0-3 ℃, not starting the operation of the refrigeration circuit and the heating circuit; if the temperature difference between the upper surface of the heat exchanger and the lower surface of the heat exchanger exceeds the range of 0-3 c, the refrigeration circuit and the heating circuit are simultaneously activated such that the temperature difference between the upper surface of the heat exchanger and the lower surface of the heat exchanger is in the range of 0-3 c.
In step 13), the temperature difference between the upper surface and the lower surface of the heat exchangerIs calculated by the following formula (1):
(1)；
Wherein, Is the area of the electrical vortex at the upper surface of the heat exchanger,For the conductivity of the heat exchanger,Is the normal operating temperature of the upper surface of the heat exchanger,Is the temperature of the heat exchanger after the upper surface temperature is raised,For the comparison of the elevated temperature of the upper surface of the heat exchanger with the normal operating temperature of the upper surface of the heat exchanger, exp (-) is a relative calculated function,Is the upper surface temperature of the heat exchanger;
is the area of the electrical vortex at the lower surface of the heat exchanger, Is the normal operating temperature of the lower surface of the heat exchanger,Is the temperature of the lower surface of the heat exchanger after the temperature is reduced,To compare the reduced temperature of the lower surface of the heat exchanger with the normal operating temperature of the lower surface of the heat exchanger,Is the lower surface temperature of the heat exchanger;
[ ] is a function of calculating the current temperature of the upper surface of the heat exchanger or a function of calculating the current temperature of the lower surface of the heat exchanger, As a function of the absolute value of the function,Is the temperature difference between the upper and lower surfaces of the heat exchanger,Positive values.
Calculating a temperature difference between an upper surface and a lower surface of the heat exchanger by determining the upper surface temperature and the lower surface temperature of the heat exchanger。
Further, the calculation of the current vortex area of the upper surface of the heat exchanger is formula (2); the calculation of the current vortex area of the lower surface of the heat exchanger is equation (3):
(2)；
(3)；
in the formula (2) of the present invention, I is the number of the eddy currents on the upper surface of the heat exchanger, N is the total number of the eddy currents on the upper surface of the heat exchanger,Is the aggregation of the eddy currents on the upper surface of the heat exchanger,Is the current that a certain eddy current of the upper surface of the heat exchanger has,Is the aggregation of the current possessed by the eddy current of the upper surface of the heat exchanger,For the aggregation of the electric vortex of the upper surface of the heat exchanger, corresponding to the aggregation of the electric current of the electric vortex of the upper surface of the heat exchanger, making the number of the electric vortex of the upper surface of the heat exchanger equal to the number of the electric current of the electric vortex of the upper surface of the heat exchanger;
In the formula (3) of the present invention, For a certain eddy current of the lower surface of the heat exchanger, q is the number of eddy currents of the lower surface of the heat exchanger, K is the total number of eddy currents of the lower surface of the heat exchanger,Is the aggregation of the eddy currents of the lower surface of the heat exchanger,Is the current that a certain eddy current of the lower surface of the heat exchanger has,Is the aggregation of the current possessed by the eddy current of the lower surface of the heat exchanger,The aggregation of the electric vortex of the lower surface of the heat exchanger corresponds to the aggregation of the electric current of the electric vortex of the lower surface of the heat exchanger, so that the number of the electric vortex of the lower surface of the heat exchanger is equal to the number of the electric current of the electric vortex of the lower surface of the heat exchanger.
In the step 2), the temperature of the heat exchanger is acquired by using an AI intelligent method, and the following formula (4) is adopted:
(4)；
Wherein, For the temperature acquired by the heat exchanger at time j,The temperature of the heat exchanger at time j, j being a time,Is the resistance temperature of the heat exchanger at time j,Is the temperature ratio of the temperature of the heat exchanger at time j to the temperature of the heat exchanger at time j +1,As a function of the absolute value of the function,Take a positive value.
In step 3), the temperature of the heat exchanger is determined by using a temperature difference method, and the following formula (5) is adopted:
(5)；
where a is the temperature difference between the upper and lower surfaces of the heat exchanger, Is the unit area of the upper surface of the heat exchanger,Is the number of the unit areas of the upper surface of the heat exchanger,Is the unit area of the lower surface of the heat exchanger,Is the number of the unit areas of the lower surface of the heat exchanger,Is the thermal conductivity between the upper and lower surfaces of the heat exchanger,Is the thickness between the upper and lower surfaces of the heat exchanger,As a function of absolute value.
Further, the calculation of the thermal conductivity between the upper and lower surfaces of the heat exchanger uses equation (6):
(6)；
Wherein, Is the heat conduction vector of the upper surface of the heat exchanger toward the lower surface of the heat exchanger or the heat conduction vector of the lower surface of the heat exchanger toward the upper surface of the heat exchanger,Is the heat conduction temperature per unit thickness between the upper and lower surfaces of the heat exchanger,Is the rated heat conducting temperature of the heat exchanger.
Is a vector, when the upper surface temperature of the heat exchanger is higher than the lower surface temperature of the heat exchanger,A heat conduction vector of a lower surface of the heat exchanger toward an upper surface of the heat exchanger; when the upper surface temperature of the heat exchanger is lower than the lower surface temperature of the heat exchanger,A heat conduction vector of an upper surface of the heat exchanger toward a lower surface of the heat exchanger;
in step 4), the calculation of the temperature plateau method is the formula (7):
(7)；
Wherein, As a result of the temperature threshold value,For the operating temperature of the heat exchanger,As a temperature correction factor, a temperature correction factor is used,Is the operating temperature coefficient of the heat exchanger,Is the rated heat conduction temperature coefficient of the heat exchanger,Is the rated heat conducting temperature of the heat exchanger.
SOC is the management software that the thermal management system of the lithium battery itself has,Setting the working temperature of the heat exchanger; The temperature correction factor of the thermal management system of the SOC lithium battery is that of the lithium battery under the conditions of cyclic use and service life satisfaction 。
In step 4), the temperature threshold of the heat exchanger is adjusted by:
step 41): detecting the temperature of the upper surface and the temperature of the lower surface of the heat exchanger;
Step 42): the temperature of the upper surface and the temperature of the lower surface of the heat exchanger are adjusted to be equal (e.g., 0 ℃) and the temperature of the upper surface and the temperature of the lower surface of the heat exchanger are within a range of a temperature threshold (. + -. 3 ℃).
Example 2:
based on example 1, the optimization method of the invention is mainly embodied in: the temperature of the upper surface of the heat exchanger and the temperature of the lower surface of the heat exchanger are regulated, and the temperature of the upper surface of the heat exchanger and the temperature of the lower surface of the heat exchanger are kept within the range of temperature threshold values through temperature refrigeration regulation of the upper surface of the heat exchanger and temperature heating regulation of the lower surface of the heat exchanger, namely the temperature difference between the upper surface temperature of the heat exchanger and the lower surface temperature of the heat exchanger is small (such as within the range of +/-3 ℃).
Example 3:
Based on the embodiment 1, as shown in fig. 2, the heat exchanger 1 has upper and lower surfaces, the heat exchanger 1 itself is made of semiconductor material, the heat exchanger 1 can be energized or conductive, after the heat exchanger 1 is energized or conductive, the upper and lower surfaces of the heat exchanger 1 generate eddy currents 2, and the generation of the eddy currents 2 causes the upper and lower surfaces of the heat exchanger 1 to have temperatures.
The generation of the electric vortex 2 and the distribution of the electric vortex 2 on the upper and lower surfaces of the heat exchanger 1 are determined according to the distribution of the electric conductivities of the upper and lower surfaces of the heat exchanger 1, and the uneven distribution of the electric conductivities of the upper and lower surfaces of the heat exchanger 1 causes the electric vortex 2 to be unevenly distributed on the upper and lower surfaces of the heat exchanger 1.
The above description is merely an embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think about changes or substitutions within the technical scope of the present invention, and it is intended to cover the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (8)
1. An optimization method for carrying out thermal management on a new energy battery is characterized by comprising the following steps:
Step 1): a refrigeration loop and a heating loop are arranged in the lithium battery; wherein, a heat exchanger is arranged between the refrigerating loop and the heating loop, and the heat exchanger is used for circularly controlling the refrigerating and heating of the lithium battery;
step 2): collecting the temperature of the heat exchanger, and collecting the temperature of the heat exchanger by using an AI intelligent method;
Step 3): judging the temperature of the collected heat exchanger by using a temperature difference method; wherein the heat exchanger generates refrigeration if the temperature of the heat exchanger is higher than a set temperature threshold, and generates heating if the temperature of the heat exchanger is lower than the set temperature threshold;
step 4): regulating the temperature of the heat exchanger by using a temperature stabilizing method to ensure that the temperature of the heat exchanger is kept within the range of a temperature threshold;
Wherein, in the step 1), the heat exchanger circularly controls the refrigeration and heating of the lithium battery, and the following steps are adopted:
Step 11): connecting the upper surface of the heat exchanger to the refrigerating circuit through a circuit, connecting the lower surface of the heat exchanger to the heating circuit through a circuit, keeping the temperature of the upper surface of the heat exchanger not higher than 10 ℃, keeping the temperature of the lower surface of the heat exchanger not lower than-10 ℃, and measuring the temperatures of the upper surface and the lower surface of the heat exchanger;
Step 12): if the temperature of the upper surface of the heat exchanger is higher than 10 ℃, starting a refrigeration circuit connected with the upper surface of the heat exchanger to reduce the temperature of the upper surface of the heat exchanger; if the temperature of the lower surface of the heat exchanger is lower than-10 ℃, starting a heating circuit connected with the lower surface of the heat exchanger to raise the temperature of the lower surface of the heat exchanger;
step 13): measuring a temperature difference between the upper surface and the lower surface of the heat exchanger, and if the temperature difference between the upper surface and the lower surface of the heat exchanger is in the range of 0-3 ℃, not starting the operation of the refrigeration circuit and the heating circuit; if the temperature difference between the upper surface of the heat exchanger and the lower surface of the heat exchanger exceeds the range of 0-3 c, the refrigeration circuit and the heating circuit are simultaneously activated such that the temperature difference between the upper surface of the heat exchanger and the lower surface of the heat exchanger is in the range of 0-3 c.
2. The optimizing method for heat management of a new energy battery according to claim 1, wherein in the step 13), the calculation of the temperature difference between the upper surface and the lower surface of the heat exchanger is performed using the following formula (1):
(1)；
Wherein, Is the area of the electrical vortex at the upper surface of the heat exchanger,For the conductivity of the heat exchanger,Is the normal operating temperature of the upper surface of the heat exchanger,Is the temperature of the heat exchanger after the upper surface temperature is raised,For the relative comparison of the elevated temperature of the upper surface of the heat exchanger and the normal operating temperature of the upper surface of the heat exchanger, exp (·) is a calculated function of the relative ratio;
is the area of the electrical vortex at the lower surface of the heat exchanger, Is the normal operating temperature of the lower surface of the heat exchanger,Is the temperature of the lower surface of the heat exchanger after the temperature is reduced,A reduced temperature for the lower surface of the heat exchanger relative to a normal operating temperature for the lower surface of the heat exchanger;
[ ] is a function of calculating the current temperature of the upper surface of the heat exchanger or a function of calculating the current temperature of the lower surface of the heat exchanger, As a function of the absolute value of the function,Is the temperature difference between the upper and lower surfaces of the heat exchanger,Positive values.
3. The optimizing method for heat management of a new energy battery according to claim 2, wherein the calculation of the current vortex area of the upper surface of the heat exchanger is formula (2); the calculation of the current vortex area of the lower surface of the heat exchanger is represented by formula (3):
(2)；
(3)；
in the formula (2) of the present invention, I is the number of the eddy currents on the upper surface of the heat exchanger, N is the total number of the eddy currents on the upper surface of the heat exchanger,Is the aggregation of the eddy currents on the upper surface of the heat exchanger,Is the current that a certain eddy current of the upper surface of the heat exchanger has,Is the aggregation of the current possessed by the eddy current of the upper surface of the heat exchanger,For the aggregation of the electric vortex of the upper surface of the heat exchanger, corresponding to the aggregation of the electric current of the electric vortex of the upper surface of the heat exchanger, making the number of the electric vortex of the upper surface of the heat exchanger equal to the number of the electric current of the electric vortex of the upper surface of the heat exchanger;
In the formula (3) of the present invention, For a certain eddy current of the lower surface of the heat exchanger, q is the number of eddy currents of the lower surface of the heat exchanger, K is the total number of eddy currents of the lower surface of the heat exchanger,Is the aggregation of the eddy currents of the lower surface of the heat exchanger,Is the current that a certain eddy current of the lower surface of the heat exchanger has,Is the aggregation of the current possessed by the eddy current of the lower surface of the heat exchanger,The aggregation of the electric vortex of the lower surface of the heat exchanger corresponds to the aggregation of the electric current of the electric vortex of the lower surface of the heat exchanger, so that the number of the electric vortex of the lower surface of the heat exchanger is equal to the number of the electric current of the electric vortex of the lower surface of the heat exchanger.
4. The optimizing method for heat management of a new energy battery according to claim 1, wherein in the step 2), the temperature of the heat exchanger is collected by the AI intelligent method, using the following formula (4):
(4)；
Wherein, For the temperature acquired by the heat exchanger at time j,The temperature of the heat exchanger at time j, j being a time,Is the resistance temperature of the heat exchanger at time j,Is the temperature ratio of the temperature of the heat exchanger at time j to the temperature of the heat exchanger at time j +1,As a function of the absolute value of the function,Take a positive value.
5. The optimizing method for heat management of a new energy battery according to claim 1, wherein in the step 3), the temperature of the heat exchanger collected is judged by the temperature difference method, using the following formula (5):
(5)；
where a is the temperature difference between the upper and lower surfaces of the heat exchanger, Is the unit area of the upper surface of the heat exchanger,Is the number of the unit areas of the upper surface of the heat exchanger,Is the unit area of the lower surface of the heat exchanger,Is the number of the unit areas of the lower surface of the heat exchanger,Is the thermal conductivity between the upper and lower surfaces of the heat exchanger,Is the thickness between the upper and lower surfaces of the heat exchanger,As a function of absolute value.
6. The optimizing method for heat management of a new energy battery according to claim 5, wherein the calculation of the thermal conductivity between the upper surface and the lower surface of the heat exchanger uses formula (6):
(6)；
Wherein, Is the heat conduction vector of the upper surface of the heat exchanger toward the lower surface of the heat exchanger or the heat conduction vector of the lower surface of the heat exchanger toward the upper surface of the heat exchanger,Is the heat conduction temperature per unit thickness between the upper and lower surfaces of the heat exchanger,Is the rated heat conducting temperature of the heat exchanger.
7. The optimizing method for thermal management of a new energy battery according to claim 1, wherein in the step 4), the calculation of the temperature plateau method is represented by the formula (7):
(7)；
Wherein, As a result of the temperature threshold value in question,For the operating temperature of the heat exchanger,As a temperature correction factor, a temperature correction factor is used,Is the operating temperature coefficient of the heat exchanger,Is the rated heat conduction temperature coefficient of the heat exchanger,Is the rated heat conducting temperature of the heat exchanger.
8. The method of optimizing thermal management of a new energy battery according to claim 1, characterized in that in said step 4), the adjustment of said temperature threshold of said heat exchanger is performed by:
step 41): detecting the temperature of the upper surface and the temperature of the lower surface of the heat exchanger;
Step 42): the temperature of the upper surface and the temperature of the lower surface of the heat exchanger are adjusted to be equal temperatures, and the temperature of the upper surface and the temperature of the lower surface of the heat exchanger are within a range of temperature thresholds.
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Non-Patent Citations (1)
| Title |
|---|
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