CN109546234B - Power battery thermal management control method, power battery thermal management system and vehicle - Google Patents
Power battery thermal management control method, power battery thermal management system and vehicle Download PDFInfo
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- CN109546234B CN109546234B CN201711229460.1A CN201711229460A CN109546234B CN 109546234 B CN109546234 B CN 109546234B CN 201711229460 A CN201711229460 A CN 201711229460A CN 109546234 B CN109546234 B CN 109546234B
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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
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
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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
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
- H01M10/486—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for measuring 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
- H01M10/63—Control systems
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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
- H01M2220/00—Batteries for particular applications
- H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
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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
Abstract
The invention provides a power battery thermal management control method, a power battery thermal management system and a vehicle. The power battery thermal management control method comprises the following steps: detecting the temperature of the power battery and the temperature of the cooling medium; and determining a corresponding temperature control mode according to the temperature interval of the power battery temperature and the temperature of the cooling medium, and adjusting the power battery temperature to a target temperature according to the determined temperature control mode, wherein different temperature control modes have different energy consumptions. The thermal management control method for the power battery can optimize the temperature control of the power battery, reduce energy consumption and control the temperature of the power battery within the optimal working temperature range.
Description
Technical Field
The invention relates to the technical field of automobiles, in particular to a power battery thermal management control method, a power battery thermal management system and a vehicle.
Background
In the related art, although the power battery heat control method determines whether to perform heat control on the power battery based on the temperature of the power battery, the control method is only simple on-off control, that is: when the temperature of the power battery exceeds a certain set value, the thermal control system heats or cools the power battery, and the control mode is single. The thermal control requirements of the power battery in different temperature intervals cannot be met, meanwhile, the control method is only to simply control the thermal management system to carry out thermal control on the power battery, the efficiency and the thermal control effect are not considered, and the thermal control effect of the power battery is not ideal.
Disclosure of Invention
In view of this, the present invention is directed to a method for controlling thermal management of a power battery. The power battery thermal management control method can optimize the temperature control of the power battery, reduce energy consumption and control the temperature of the power battery within the optimal working temperature range.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a thermal management control method for a power battery comprises the following steps: detecting the temperature of the power battery and the temperature of the cooling medium; and determining a corresponding temperature control mode according to the temperature interval of the power battery temperature and the temperature of the cooling medium, and adjusting the power battery temperature to a target temperature according to the determined temperature control mode, wherein different temperature control modes have different energy consumptions.
Further, the temperature control mode comprises a low energy consumption temperature control mode, a medium energy consumption control mode and a high energy consumption control mode, wherein the energy consumption is increased in sequence.
Further, the determining a corresponding temperature control mode according to the temperature interval of the power battery temperature and the magnitude of the cooling medium temperature, and adjusting the power battery temperature to a target temperature according to the determined temperature control mode includes: if the power battery temperature is in a first temperature interval and the cooling medium temperature is lower than a first preset temperature, adjusting the power battery temperature to a target temperature in a low-energy-consumption temperature control mode; if the power battery temperature is in a second temperature interval, adjusting the power battery temperature to a target temperature in a medium energy consumption control mode; and if the temperature of the power battery is in a third temperature interval, adjusting the temperature of the power battery to a target temperature in a high energy consumption control mode, wherein the upper limit temperature of the first temperature interval is smaller than the lower limit temperature of the second temperature interval, and the upper limit temperature of the second temperature interval is smaller than the lower limit temperature of the third temperature interval.
Further, the first temperature interval is [30 ℃ -35 ℃), the second temperature interval is [35 ℃ -40 ℃), the third temperature interval is [40 ℃ -50 ℃), and the first preset temperature is [20 ℃ -30 ℃).
Further, the method also comprises the following steps: and if the temperature of the power battery is higher than a second preset temperature, alarming, wherein the second preset temperature is determined according to the limit temperature of the power battery capable of working normally.
The thermal management control method for the power battery can optimize the temperature control of the power battery, reduce energy consumption and control the temperature of the power battery within the optimal working temperature range. In addition, the temperature control mode of automatic adjustment can carry out automatic adjustment according to power battery temperature variation to control power battery temperature at optimum temperature, effectively prolonged power battery life, reduced user's use cost.
The second purpose of the invention is to provide a power battery thermal management system. The power battery thermal management system can optimize the temperature control of the power battery, reduce energy consumption and control the temperature of the power battery within the optimal working temperature range.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a power cell thermal management system, comprising: the detection module is used for detecting the temperature of the power battery and the temperature of the cooling medium; and the control module is used for determining a corresponding temperature control mode according to the temperature interval of the power battery temperature and the temperature of the cooling medium, and adjusting the power battery temperature to a target temperature according to the determined temperature control mode, wherein the energy consumption of different temperature control modes is different.
Further, the temperature control mode comprises a low energy consumption temperature control mode, a medium energy consumption control mode and a high energy consumption control mode, wherein the energy consumption is increased in sequence.
Further, the control module is configured to: if the power battery temperature is in a first temperature interval and the cooling medium temperature is lower than a first preset temperature, adjusting the power battery temperature to a target temperature in a low-energy-consumption temperature control mode; if the power battery temperature is in a second temperature interval, adjusting the power battery temperature to a target temperature in a medium energy consumption control mode; and if the temperature of the power battery is in a third temperature interval, adjusting the temperature of the power battery to a target temperature in a high energy consumption control mode, wherein the upper limit temperature of the first temperature interval is smaller than the lower limit temperature of the second temperature interval, and the upper limit temperature of the second temperature interval is smaller than the lower limit temperature of the third temperature interval.
Further, the first temperature interval is [30 ℃ -35 ℃), the second temperature interval is [35 ℃ -40 ℃), the third temperature interval is [40 ℃ -50 ℃), and the first preset temperature is [20 ℃ -30 ℃).
Compared with the prior art, the power battery thermal management system and the power battery thermal management control method have the same advantages, and are not repeated herein.
A third object of the present invention is to provide a vehicle that can optimize the temperature control of a power battery, reduce energy consumption, and control the temperature of the power battery within an optimal operating temperature range.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a vehicle is provided with the power battery thermal management system according to any one of the embodiments.
Compared with the prior art, the vehicle and the power battery thermal management system have the same advantages, and the detailed description is omitted.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a flowchart of a power battery thermal management control method according to an embodiment of the present invention;
fig. 2 is a block diagram of a power battery thermal management system according to an embodiment of the present invention.
Description of reference numerals:
the system comprises a power battery thermal management system 200, a detection module 210 and a control module 220.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
Fig. 1 is a flowchart of a power battery thermal management control method according to an embodiment of the invention. As shown in fig. 1, a method for controlling thermal management of a power battery according to an embodiment of the present invention includes the following steps:
s101: and detecting the temperature of the power battery and the temperature of the cooling medium.
S102: and determining a corresponding temperature control mode according to the temperature interval of the power battery temperature and the temperature of the cooling medium, and adjusting the power battery temperature to the target temperature according to the determined temperature control mode, wherein the energy consumption of different temperature control modes is different.
As a specific example, the temperature control mode includes three temperature control modes, for example: the energy consumption control system comprises a low energy consumption temperature control mode, a medium energy consumption control mode and a high energy consumption control mode, wherein the energy consumption of the low energy consumption temperature control mode, the medium energy consumption control mode and the high energy consumption control mode is increased in sequence.
Specifically, if the power battery temperature is in a first temperature interval and the cooling medium temperature is less than a first preset temperature, the power battery temperature is adjusted to a target temperature in a low-energy-consumption temperature control mode; if the temperature of the power battery is in a second temperature interval, adjusting the temperature of the power battery to a target temperature in a medium energy consumption control mode; and if the temperature of the power battery is in a third temperature interval, adjusting the temperature of the power battery to a target temperature in a high energy consumption control mode, wherein the upper limit temperature of the first temperature interval is smaller than the lower limit temperature of the second temperature interval, and the upper limit temperature of the second temperature interval is smaller than the lower limit temperature of the third temperature interval.
For example: the first temperature interval is 30-35 ℃, the second temperature interval is 35-40 ℃, the third temperature interval is 40-50 ℃, and the first preset temperature is 20-30 ℃.
That is, when the temperature of the power battery is higher than the threshold T1 (i.e., the lower limit temperature of the first temperature interval, such as 30 ℃) and the temperature of the cooling medium is less than or equal to the threshold TL1 (i.e., the first predetermined temperature, such as 25 ℃), the power battery is thermally controlled by using the low-energy consumption temperature control mode, the low-energy consumption temperature control mode can realize pre-control of the temperature of the power battery, reduce the starting frequency of the medium-energy consumption control mode and the high-energy consumption control mode, and the low-energy consumption temperature control mode thermally manages the power battery in a low-energy consumption mode, for example: only the natural circulation of a cooling medium in the thermal management system is controlled, heat dissipation is performed in a natural heat dissipation mode, and the like, so that the temperature of the power battery can be controlled to be at an appropriate working temperature while the energy consumption is effectively reduced, and the appropriate working temperature refers to the upper limit temperature of the power battery, which can meet the service life and the optimal discharge performance.
When the temperature of the power battery is higher than the threshold T2 (namely, the lower limit temperature of the second temperature interval, for example, 35 ℃), the power battery is subjected to thermal control by using the medium energy consumption control mode, and the medium energy consumption control mode can effectively control the temperature of the power battery and meet the control of the temperature of the power battery under the conventional use conditions which cannot be covered by the low energy consumption control mode, for example, the conventional use conditions in summer. Although the medium energy consumption control mode can increase energy consumption properly compared with the low energy consumption control mode, the energy consumption is not high relatively, the requirement for controlling the temperature of the power battery can be met, and the temperature of the power battery is controlled at a proper working temperature.
In the medium energy consumption control mode, a compressor, a heat exchanger and the like are needed to exchange heat for cooling media, but the compressor and the like can run with relatively low power, so that the requirement on temperature control of the power battery is met while the energy consumption is relatively low.
When the temperature of the power battery is higher than the threshold T3 (namely, the lower limit temperature of the third temperature interval, such as 40 ℃), the power battery is subjected to thermal control by using the high-energy consumption control mode, and the temperature of the power battery can be rapidly controlled by using the high-energy consumption control mode, so that the temperature control requirement of the power battery under the high-load condition, such as the use condition under the high-temperature environment, is met. The high energy consumption control mode can control the temperature of the power battery at full power, the energy consumption for controlling the temperature of the power battery is relatively high at the moment, but the temperature of the power battery can be controlled at the fastest speed, and therefore the damage to the power battery caused by the fact that the temperature of the power battery continuously rises is avoided.
In one embodiment of the present invention, further comprising: and if the temperature of the power battery is higher than a second preset temperature, alarming, wherein the second preset temperature is determined according to the limit temperature of the power battery which can normally work. For example: when the temperature of the power battery exceeds 40-50 ℃, the temperature range is close to the limit of the normal working temperature of the power battery, and the power battery can be damaged by the continuous temperature rise, so the second preset temperature can be set to be between 40-50 ℃.
According to the power battery thermal management control method provided by the embodiment of the invention, the optimization of power battery temperature control can be realized, the energy consumption is reduced, and the power battery temperature is controlled within the optimal working temperature range. In addition, the temperature control mode of automatic adjustment can carry out automatic adjustment according to power battery temperature variation to control power battery temperature at optimum temperature, effectively prolonged power battery life, reduced user's use cost.
Fig. 2 is a block diagram of a power battery thermal management system according to an embodiment of the invention. As shown in fig. 2, a power battery thermal management system 200 according to an embodiment of the present invention includes: a detection module 210 and a control module 220.
The detection module 210 is configured to detect a power battery temperature and a cooling medium temperature; the control module 220 is configured to determine a corresponding temperature control mode according to a temperature interval where the power battery temperature is located and the magnitude of the cooling medium temperature, and adjust the power battery temperature to a target temperature according to the determined temperature control mode, where energy consumption of different temperature control modes is different.
In one embodiment of the invention, the temperature control mode comprises a low energy consumption temperature control mode, a medium energy consumption control mode and a high energy consumption control mode in which the energy consumption is increased in sequence.
In one embodiment of the present invention, the control module 220 is configured to: if the power battery temperature is in a first temperature interval and the cooling medium temperature is lower than a first preset temperature, adjusting the power battery temperature to a target temperature in a low-energy-consumption temperature control mode; if the power battery temperature is in a second temperature interval, adjusting the power battery temperature to a target temperature in a medium energy consumption control mode; and if the temperature of the power battery is in a third temperature interval, adjusting the temperature of the power battery to a target temperature in a high energy consumption control mode, wherein the upper limit temperature of the first temperature interval is smaller than the lower limit temperature of the second temperature interval, and the upper limit temperature of the second temperature interval is smaller than the lower limit temperature of the third temperature interval.
In one embodiment of the invention, the first temperature interval is [30 ℃ -35 ℃), the second temperature interval is [35 ℃ -40 ℃), the third temperature interval is [40 ℃ -50 ℃), and the first predetermined temperature is [20 ℃ -30 ℃).
According to the power battery thermal management system provided by the embodiment of the invention, the temperature control of the power battery can be optimized, the energy consumption is reduced, and the temperature of the power battery is controlled within an optimal working temperature range. In addition, the temperature control mode of automatic adjustment can carry out automatic adjustment according to power battery temperature variation to control power battery temperature at optimum temperature, effectively prolonged power battery life, reduced user's use cost.
It should be noted that the specific implementation manner of the power battery thermal management system according to the embodiment of the present invention is similar to the specific implementation manner of the power battery thermal management control method according to the embodiment of the present invention, and please refer to the description of the method part specifically, and details are not repeated here in order to reduce redundancy.
Further, a vehicle is provided with the power battery thermal management system according to any one of the above embodiments. The vehicle is, for example, an electric vehicle, and the vehicle can optimize the temperature control of the power battery, reduce energy consumption, and control the temperature of the power battery within an optimal working temperature range. In addition, the temperature control mode of automatic adjustment can carry out automatic adjustment according to power battery temperature variation to control power battery temperature at optimum temperature, effectively prolonged power battery life, reduced user's use cost.
In addition, other configurations and functions of the vehicle according to the embodiment of the present invention are known to those skilled in the art, and are not described herein in detail in order to reduce redundancy.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (6)
1. The power battery thermal management control method is characterized by comprising the following steps:
detecting the temperature of the power battery and the temperature of the cooling medium;
determining a corresponding temperature control mode according to the temperature interval of the power battery temperature and the size of the cooling medium temperature, adjusting the power battery temperature to a target temperature according to the determined temperature control mode,
wherein, the energy consumption of different temperature control modes is different;
the temperature control mode comprises a low energy consumption temperature control mode, a medium energy consumption control mode and a high energy consumption control mode, wherein the energy consumption is increased in sequence;
the determining a corresponding temperature control mode according to a temperature interval where the power battery temperature is located and the size of the cooling medium temperature, and adjusting the power battery temperature to a target temperature according to the determined temperature control mode includes:
if the power battery temperature is in a first temperature interval and the cooling medium temperature is lower than a first preset temperature, adjusting the power battery temperature to a target temperature in a low-energy-consumption temperature control mode;
if the power battery temperature is in a second temperature interval, adjusting the power battery temperature to a target temperature in a medium energy consumption control mode;
if the power battery temperature is in a third temperature interval, adjusting the power battery temperature to a target temperature in a high energy consumption control mode,
the upper limit temperature of the first temperature interval is smaller than the lower limit temperature of the second temperature interval, and the upper limit temperature of the second temperature interval is smaller than the lower limit temperature of the third temperature interval.
2. The power battery thermal management control method according to claim 1, wherein the first temperature interval is [30 ℃ -35 ℃), the second temperature interval is [35 ℃ -40 ℃), the third temperature interval is [40 ℃ -50 ℃), and the first predetermined temperature is [20 ℃ -30 ℃).
3. The power battery thermal management control method according to any one of claims 1-2, further comprising:
and if the temperature of the power battery is higher than a second preset temperature, alarming, wherein the second preset temperature is determined according to the limit temperature of the power battery capable of working normally.
4. A power battery thermal management system, comprising:
the detection module is used for detecting the temperature of the power battery and the temperature of the cooling medium;
the control module is used for determining a corresponding temperature control mode according to a temperature interval where the temperature of the power battery is located and the temperature of the cooling medium, and adjusting the temperature of the power battery to a target temperature according to the determined temperature control mode, wherein different temperature control modes have different energy consumptions;
the temperature control mode comprises a low energy consumption temperature control mode, a medium energy consumption control mode and a high energy consumption control mode, wherein the energy consumption is increased in sequence;
the control module is used for:
if the power battery temperature is in a first temperature interval and the cooling medium temperature is lower than a first preset temperature, adjusting the power battery temperature to a target temperature in a low-energy-consumption temperature control mode;
if the power battery temperature is in a second temperature interval, adjusting the power battery temperature to a target temperature in a medium energy consumption control mode;
if the power battery temperature is in a third temperature interval, adjusting the power battery temperature to a target temperature in a high energy consumption control mode,
the upper limit temperature of the first temperature interval is smaller than the lower limit temperature of the second temperature interval, and the upper limit temperature of the second temperature interval is smaller than the lower limit temperature of the third temperature interval.
5. The power cell thermal management system of claim 4, wherein the first temperature interval is [30 ℃ -35 ℃), the second temperature interval is [35 ℃ -40 ℃), the third temperature interval is [40 ℃ -50 ℃), and the first predetermined temperature is [20 ℃ -30 ℃).
6. A vehicle, characterized in that a power battery thermal management system according to any one of claims 4-5 is provided.
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| US11342601B2 (en) | 2020-07-10 | 2022-05-24 | Contemporary Amperex Technology Co., Limited | Thermal runaway detection method and battery management system |
| CN111751756B (en) * | 2020-07-31 | 2022-06-03 | 中国汽车工程研究院股份有限公司 | Method for identifying fault battery monomer by using accumulated power battery temperature curve |
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