CN113285147B - Battery temperature control method and device, battery management system and storage medium - Google Patents

Battery temperature control method and device, battery management system and storage medium Download PDF

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CN113285147B
CN113285147B CN202110562456.7A CN202110562456A CN113285147B CN 113285147 B CN113285147 B CN 113285147B CN 202110562456 A CN202110562456 A CN 202110562456A CN 113285147 B CN113285147 B CN 113285147B
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pdo
strategy
temperature
battery
changed
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CN113285147A (en
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请求不公布姓名
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Suzhou Zhendi Intelligent Technology Co Ltd
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Suzhou Zhendi Intelligent Technology Co Ltd
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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
    • 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
    • H01M10/44—Methods for charging or discharging
    • H01M10/443—Methods for charging or discharging in response to temperature
    • 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
    • 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
    • H01M10/637—Control systems characterised by the use of reversible temperature-sensitive devices, e.g. NTC, PTC or bimetal devices; characterised by control of the internal current flowing through the cells, e.g. by switching
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/007—Regulation of charging or discharging current or voltage
    • H02J7/007188—Regulation of charging or discharging current or voltage the charge cycle being controlled or terminated in response to non-electric parameters
    • H02J7/007192—Regulation of charging or discharging current or voltage the charge cycle being controlled or terminated in response to non-electric parameters in response to temperature
    • H02J7/007194—Regulation of charging or discharging current or voltage the charge cycle being controlled or terminated in response to non-electric parameters in response to temperature of the battery
    • 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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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Automation & Control Theory (AREA)
  • Power Engineering (AREA)
  • Secondary Cells (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

The application provides a battery temperature control method and device, a battery management system and a storage medium. The battery temperature control method comprises the following steps: acquiring the battery temperature under the current PDO strategy; determining whether the current PDO strategy needs to be changed or not according to the battery temperature and a preset temperature range; when the current PDO strategy is determined to be changed, the changed PDO strategy is determined according to the corresponding relation between the preset PDO strategy and the temperature rise rate, the battery temperature and the preset temperature range; and charging or discharging the battery according to the changed PDO strategy. The method is used for realizing effective control of the battery temperature and improving the safety of the battery management system.

Description

Battery temperature control method and device, battery management system and storage medium
Technical Field
The present disclosure relates to the field of battery technologies, and in particular, to a method and an apparatus for controlling a battery temperature, a battery management system, and a storage medium.
Background
During the charging or discharging process of the battery, the temperature of the battery changes correspondingly. The battery temperature has an effect on the operation of the battery, such as: the battery temperature is too high and the battery may have a poor working effect. Therefore, during the charging or discharging process, the temperature of the battery needs to be controlled so that the battery operates at a more desirable temperature.
In the prior art, a battery management system controls the charging or discharging of a battery according to the real-time battery temperature, but the effective control of the battery temperature cannot be realized, the battery cannot be at a more ideal working temperature, and the safety of the battery management system is poor.
Disclosure of Invention
An object of the embodiments of the present application is to provide a method and an apparatus for controlling a battery temperature, a battery management system, and a storage medium, so as to achieve effective control of the battery temperature and improve the safety of the battery management system.
In a first aspect, an embodiment of the present application provides a method for controlling a battery temperature, including: acquiring the battery temperature under the current PDO strategy; determining whether the current PDO strategy needs to be changed or not according to the battery temperature and a preset temperature range; when the current PDO strategy is determined to need to be changed, the changed PDO strategy is determined according to the corresponding relation between the preset PDO strategy and the temperature rise rate, the battery temperature and the preset temperature range; and charging or discharging the battery according to the changed PDO strategy.
In the embodiment of the application, compared with the prior art, the corresponding relation between the PDO strategy and the temperature rise rate and the temperature range are preset, when the PDO strategy needs to be changed based on the battery temperature and the preset temperature range, the changed PDO strategy is determined according to the corresponding relation, the battery temperature and the preset temperature range, and the battery is charged or discharged through the changed PDO strategy. The temperature rise rate can represent the rise rate of the battery temperature, the PDO strategy is adjusted based on the corresponding relation between the characteristic and the PDO strategy and by combining the current temperature and the preset temperature range, the battery temperature can be effectively adjusted, and therefore the battery can work at a relatively ideal temperature, and the safety of a battery management system is improved.
As a possible implementation manner, the control method further includes: and when the current PDO strategy is determined to need to be changed, generating and outputting alarm information according to the battery temperature and the preset temperature range.
In the embodiment of the application, when the current PDO strategy is determined to need to be changed, the battery works at a temperature which is not ideal, and corresponding warning information is generated and output, so that a corresponding early warning effect can be achieved.
As a possible implementation manner, the upper temperature limit of the preset temperature range is a first preset temperature; when the current PDO strategy is determined to be required to be changed, the changed PDO strategy is determined according to the corresponding relation between the preset PDO strategy and the temperature rise rate, the battery temperature and the preset temperature range, and the method comprises the following steps: if the battery temperature is higher than the first preset temperature, determining the temperature rise rate corresponding to the current PDO strategy according to the corresponding relation; determining a first PDO strategy according to the corresponding relation and the temperature rise rate corresponding to the current PDO strategy; the temperature rise rate corresponding to the first PDO strategy is lower than that corresponding to the current PDO strategy; and determining a changed PDO strategy according to the first PDO strategy.
In the embodiment of the application, when determining the changed PDO strategy, if the battery temperature is greater than the upper temperature limit of the preset temperature range, the first PDO strategy is determined, and then the changed PDO strategy is determined based on the first PDO strategy. Because the temperature rise rate of the first PDO strategy is lower than that of the current PDO strategy, the battery temperature can be reduced by changing the PDO strategy, and the effective control of the battery temperature is realized.
As a possible implementation manner, the lower temperature limit of the preset temperature range is a second preset temperature; when the current PDO strategy is determined to be required to be changed, the changed PDO strategy is determined according to the corresponding relation between the preset PDO strategy and the temperature rise rate, the battery temperature and the preset temperature range, and the method comprises the following steps: if the battery temperature is lower than the second preset temperature, determining the temperature rise rate corresponding to the current PDO strategy according to the corresponding relation; determining a second PDO strategy according to the corresponding relation and the temperature rise rate corresponding to the current PDO strategy; the temperature rise rate corresponding to the second PDO strategy is higher than that corresponding to the current PDO strategy; and determining the changed PDO strategy according to the second PDO strategy.
In the embodiment of the present application, when determining the changed PDO policy, if the battery temperature is less than the lower temperature limit of the preset temperature range, the second PDO policy is determined, and then the changed PDO policy is determined based on the second PDO policy. Because the temperature rise rate of the second PDO strategy is higher than that of the current PDO strategy, the battery temperature can be raised by changing the PDO strategy, and the effective control of the battery temperature is realized.
As a possible implementation manner, the control method further includes: acquiring the current environment temperature; the PDO strategy determining the change according to the correspondence between the preset PDO strategy and the temperature rise rate, the battery temperature, and the preset temperature range further includes: and determining a changed PDO strategy according to a preset corresponding relation between the PDO strategy corresponding to the current environment temperature and the temperature rise rate, the battery temperature and the preset temperature range.
In the embodiment of the application, the corresponding relationship between the PDO strategy and the temperature rise rate may also correspond to different ambient temperatures, and thus a more reasonably changed PDO strategy may be determined based on the corresponding relationship between the PDO strategy corresponding to the current ambient temperature and the temperature rise rate.
As a possible implementation manner, before the obtaining of the battery temperature under the current PDO strategy, the control method further includes: performing a charge test or a discharge test on the battery through different PDO strategies at different environmental temperatures; recording temperature change information of the battery under different PDO strategies in the process of a charging test or a discharging test; and determining the corresponding relation between the PDO strategy corresponding to different environmental temperatures and the temperature rise rate according to the temperature change information of the battery.
In the embodiment of the application, the battery is subjected to charging test or discharging test through different PDO strategies at different environmental temperatures in advance, corresponding temperature change information is obtained, and the presetting of the corresponding relation between the PDO strategies corresponding to the different environmental temperatures and the temperature rise rate is realized based on the temperature change information.
As a possible implementation manner, the control method further includes: determining PDO strategies supported by a charging end and a receiving end corresponding to the battery; the all-supported PDO policies include the current PDO policy and/or the changed PDO policy.
In the embodiment of the application, the current PDO strategy and/or the changed PDO strategy are/is limited by determining the PDO strategies supported by the charging end and the receiving end corresponding to the battery, so that the charging or discharging stability of the battery is improved.
In a second aspect, an embodiment of the present application provides a device for controlling a battery temperature, including: functional modules for implementing the method for controlling battery temperature according to the first aspect and any one of the possible implementations of the first aspect.
In a third aspect, an embodiment of the present application provides a battery management system, including: a processor; and a memory communicatively coupled to the processor; wherein the memory stores instructions executable by the processor, and the instructions are executed by the processor to enable the processor to execute the method for controlling battery temperature as described in the first aspect and any one of the possible implementations of the first aspect.
In a fourth aspect, an embodiment of the present application provides a readable storage medium, where a computer program is stored, and when the computer program is executed by a computer, the method for controlling a battery temperature as described in the first aspect and any one of the possible implementation manners of the first aspect is performed.
Drawings
To more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments of the present application will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and that those skilled in the art can also obtain other related drawings based on the drawings without inventive efforts.
Fig. 1 is a flowchart of a method for controlling a battery temperature according to an embodiment of the present disclosure;
fig. 2 is a schematic structural diagram of a device for controlling the temperature of a battery according to an embodiment of the present disclosure;
fig. 3 is a schematic structural diagram of a battery management system according to an embodiment of the present application.
Icon: 200-control means of the battery temperature; 210-an acquisition module; 220-a processing module; 300-a battery management system; 310-a processor; 320-memory.
Detailed Description
The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application.
The technical scheme provided by the embodiment of the application can be applied to battery temperature control under a rapid charging protocol and can also be applied to battery temperature control under other protocols. Based on battery temperature control, the technical scheme can be applied to equipment with a battery, such as: mobile phones, computers, various electric devices, and the like. The battery may be a lithium battery, or may be other types of batteries, and is not limited in the embodiment of the present application.
For the above-mentioned devices, the battery and the battery management system may constitute a battery system, and the battery management system may manage various parameters (voltage, current, temperature, etc.) of the battery. That is, the control of the battery temperature is realized by the battery management system, and therefore, the hardware operating environment corresponding to the control method of the battery temperature provided by the embodiment of the present application is the battery management system.
The battery management system may be connected to other modules and charging terminals of the device, besides being connected to the battery to manage the battery, where the connection includes an electrical connection, a physical connection, and other applicable connections.
The battery management system may communicate data with other modules and charging terminals, such as: the battery temperature acquisition module transmits the real-time battery temperature to a battery management system; for another example: the battery management system transmits a charging request to the charging terminal and the like.
The battery Temperature collecting module may be an NTC (Negative Temperature Coefficient) resistor installed in the battery. An NTC resistor is a thermistor with a negative temperature coefficient whose resistance decreases exponentially with increasing temperature. Through the NTC resistance, the battery management system can realize the collection of battery temperature.
In the embodiment of the present application, in addition to installing the NTC resistor in the battery, an NTC resistor may be installed in the device to collect the ambient temperature (i.e., the temperature of the device in which the battery is located).
In addition, in the embodiment of the present application, when the battery is charged or discharged, a PDO (Power Delivery Option) strategy is adopted to implement the charging or discharging. The PDO policy, representing the manner of power delivery, may be, for example: 5V/3A, 9V/2A, 12V/1.5A, etc., which are well-established in the art, and will not be described in detail in the examples of this application.
With reference to fig. 1, a flowchart of a method for controlling a battery temperature according to an embodiment of the present application is shown based on the introduction of the application scenario, where the method includes:
step 110: and acquiring the battery temperature under the current PDO strategy.
Step 120: and determining whether the current PDO strategy needs to be changed or not according to the battery temperature and the preset temperature range.
Step 130: and when the current PDO strategy is determined to be required to be changed, determining the changed PDO strategy according to the corresponding relation between the preset PDO strategy and the temperature rise rate, the battery temperature and the preset temperature range.
Step 140: and charging or discharging the battery according to the changed PDO strategy.
In the embodiment of the application, compared with the prior art, the corresponding relation between the PDO strategy and the temperature rise rate and the temperature range are preset, when the PDO strategy needs to be changed based on the battery temperature and the preset temperature range, the changed PDO strategy is determined according to the corresponding relation, the battery temperature and the preset temperature range, and the battery is charged or discharged through the changed PDO strategy. The temperature rise rate can represent the rising rate of the battery temperature, the PDO strategy is adjusted by combining the battery temperature and a preset temperature range based on the corresponding relation between the characteristic and the PDO strategy, the effective adjustment of the battery temperature can be realized, and then the battery can work at a more ideal temperature, and the safety of a battery management system is improved.
The detailed implementation of steps 110-140 is described next.
In step 110, the battery management system acquires the battery temperature under the current PDO strategy through the NTC resistor installed in the battery.
The current PDO strategy may be understood as a real-time PDO strategy used during battery charging or discharging. Thus, step 110 can be understood as: and acquiring the battery temperature under the current PDO strategy in the process of charging or discharging the battery. Correspondingly, the current PDO strategy may be a charging PDO strategy or a discharging PDO strategy.
After the battery temperature is obtained in step 110, if the battery temperature is an ideal battery temperature, the battery temperature does not need to be controlled; if the battery temperature is not ideal, the battery temperature needs to be controlled. Therefore, in step 120, it is determined whether the current PDO strategy needs to be changed according to the battery temperature and the preset temperature range.
As an alternative embodiment, step 120 includes: if the battery temperature is within the preset temperature range, determining that the current PDO strategy does not need to be changed; and if the battery temperature is not within the preset temperature range, determining that the current PDO strategy needs to be changed.
The preset temperature range may be an ideal working temperature of the battery, and the preset temperature range corresponding to the charging process is generally different from the preset temperature range corresponding to the discharging process. Such as: the corresponding preset temperature range in the charging process can be more than 20 ℃ and less than or equal to 45 ℃; the preset temperature range corresponding to the discharging process can be more than or equal to 0 ℃ and less than or equal to 60 ℃. For different types of batteries, the preset temperature range may also be different, so that in the embodiment of the present application, only the preset temperature range is exemplarily described, and in actual application, the temperature range may be reasonably set in combination with the ideal operating temperature of the battery in a specific application scenario.
It will be appreciated that if it is determined in step 120 that the current PDO policy does not need to be changed, then the battery management system does not adjust the current PDO policy and continues to monitor the battery temperature. If it is determined in step 120 that the current PDO policy needs to be changed, step 130 is performed to determine a changed PDO policy according to a corresponding relationship between a preset PDO policy and a temperature increase rate, a battery temperature, and a preset temperature range.
The temperature rise rate can be understood as the variation amplitude of the temperature within a preset time period, such as: assuming that the preset time period is 3 minutes and the temperature rise rate is 6 degrees, it means that the temperature rises 6 degrees every three minutes. The preset time period can be set when the corresponding relation between the PDO strategy and the temperature rise rate is preset. To facilitate understanding of the embodiment of step 130, a preset manner of the corresponding relationship between the PDO strategy and the temperature rise rate will be described.
As a first optional implementation manner, before the device leaves a factory, the corresponding relationship between the PDO policy and the temperature increase rate may be directly imported or stored in the battery management system. The correspondence at this time may be a correspondence obtained by a developer through an experimental test.
The implementation mode is suitable for application scenes with low temperature precision requirements.
As a second optional implementation manner, before the device leaves the factory, the battery management system of the device autonomously learns to determine the corresponding relationship. In this embodiment, the control method further includes: carrying out charging or discharging tests on the battery through different PDO strategies; recording temperature change information of the battery under different PDO strategies in the charging or discharging test process; and determining the corresponding relation between the PDO strategy and the temperature rise rate according to the temperature change information of the battery.
The test of charging or discharging the battery may be initiated by a developer, and the test request may include a recording manner of the temperature change information, such as: the temperature was collected every 1 second and recorded.
Correspondingly, the temperature rise rate corresponding to each PDO strategy is determined according to a preset time period based on the temperature change information. And counting the temperature change amplitude in a preset time period based on the temperature change information to obtain the temperature rise rate. It should be noted that, in each preset time period, the variation amplitudes of the temperatures may be different, at this time, the variation amplitudes of the temperatures in different preset time periods may be weighted and averaged, and the finally obtained weighted average value is the temperature rise rate corresponding to the PDO policy.
It will be appreciated that the battery temperature may also be affected by the ambient temperature. Therefore, in the embodiment of the present application, the corresponding relationship between the PDO policy and the temperature rise rate may also correspond to different environmental temperatures, that is, the corresponding relationship between the environmental temperature-the PDO policy-the temperature rise rate.
In this embodiment, when the corresponding relationship is preset, the corresponding relationship between the PDO strategy and the temperature rise rate corresponding to different environmental temperatures is preset. The preset mode of the corresponding relationship is similar to the preset mode of the corresponding relationship between the PDO strategy and the temperature rise rate, and two embodiments may be included.
As a first optional implementation manner, before the device leaves a factory, the correspondence between the PDO policy and the temperature increase rate corresponding to different environmental temperatures may be directly imported or stored in the battery management system. The corresponding relationship at this time may be obtained by the developer through experimental tests.
The implementation mode is suitable for application scenes with low temperature precision requirements.
As a second optional implementation manner, before the device leaves the factory, the battery management system of the device autonomously learns to determine the corresponding relationship. In this embodiment, the control method further includes: performing a charge test or a discharge test on the battery through different PDO strategies at different environmental temperatures; recording temperature change information of the battery under different PDO strategies in the process of a charging test or a discharging test; and determining the corresponding relation between the PDO strategy corresponding to different environmental temperatures and the temperature rise rate according to the temperature change information of the battery.
The test request can be initiated by a developer when the battery is charged or discharged, and the developer can initiate the test request at different environmental temperatures. It is also possible to define the respective ambient temperatures in the test request and then the battery management system performs autonomous learning according to the ambient temperatures defined in the test request. The test request may include a recording manner of the temperature change information, such as: the temperature was collected every 1S and recorded.
Correspondingly, based on the temperature change information, the temperature rise rate corresponding to each PDO strategy at different environmental temperatures is determined according to a preset time period. And counting the temperature change amplitude in a preset time period based on the temperature change information to obtain the temperature rise rate. It should be noted that, in each preset time period, the variation amplitudes of the temperatures may be different, at this time, the variation amplitudes of the temperatures in different preset time periods may be weighted and averaged, and the finally obtained weighted average value is the temperature rise rate corresponding to the PDO policy.
Of course, the test request may not be limited to the ambient temperature (or the ambient temperature corresponding to the test request is not fixed), and when recording the temperature change information, the battery management system records the ambient temperature together (obtained from the temperature acquisition module installed in the device), and then generates the corresponding relationship between the corresponding PDO policy and the temperature increase rate based on different ambient temperatures.
Based on the introduction of the preset manner of the correspondence, the introduction of the temperature control manner based on the correspondence is continued.
In this embodiment, the preset temperature range may include an upper temperature limit and a lower temperature limit, and assuming that the upper temperature limit is a first preset temperature and the lower temperature limit is a second preset temperature, in step 130, the modified PDO policy may be determined according to a relationship between the battery temperature and the first preset temperature and the second preset temperature, and by combining a predetermined corresponding relationship.
As a first alternative implementation, step 130 includes: if the battery temperature is higher than a first preset temperature, determining the temperature rise rate corresponding to the current PDO strategy according to the corresponding relation; determining a first PDO strategy according to the corresponding relation and the temperature rise rate corresponding to the current PDO strategy; the temperature rise rate corresponding to the first PDO strategy is lower than that corresponding to the current PDO strategy; and determining the changed PDO strategy according to the first PDO strategy.
In such an embodiment, when determining the modified PDO strategy, if the battery temperature is greater than the upper temperature limit of the preset temperature range, the first PDO strategy is determined, and then the modified PDO strategy is determined based on the first PDO strategy. Because the temperature rise rate of the first PDO strategy is lower than that of the current PDO strategy, the battery temperature can be reduced by changing the PDO strategy, and the effective control of the battery temperature is realized.
There may be only one or more first PDO policies. If there is only one first PDO policy, the one PDO policy is the final changed PDO policy. If there are multiple first PDO strategies, then an altered PDO strategy may be determined from the difference between the battery temperature and the upper temperature limit.
As an alternative embodiment, if the difference between the battery temperature and the upper temperature limit is large (for example, larger than the first preset difference), the PDO policy with the lowest temperature increase rate in the first PDO policy is determined as the changed PDO policy. And if the difference between the battery temperature and the upper temperature limit is small (for example, smaller than a second preset difference), determining the PDO strategy with the highest temperature rise rate in the first PDO strategy as the changed PDO strategy. The first preset difference and the second preset difference may be reasonably set in combination with an actual application scenario, which is not limited in the embodiment of the application.
For example, in the case that the battery temperature is higher, a PDO strategy with a lower temperature rise rate may be selected, for example: 12V/1.5A.
As a second alternative, step 130 includes: if the battery temperature is lower than a second preset temperature, determining the temperature rise rate corresponding to the current PDO strategy according to the corresponding relation; determining a second PDO strategy according to the corresponding relation and the temperature rise rate corresponding to the current PDO strategy; the temperature rise rate corresponding to the second PDO strategy is higher than that corresponding to the current PDO strategy; and determining the changed PDO strategy according to the second PDO strategy.
In such an embodiment, when determining the modified PDO strategy, if the battery temperature is less than the lower temperature limit of the preset temperature range, the second PDO strategy is determined, and then the modified PDO strategy is determined based on the second PDO strategy. Because the temperature rise rate of the second PDO strategy is higher than that of the current PDO strategy, the battery temperature can be raised by changing the PDO strategy, and the effective control of the battery temperature is realized.
There may be only one or more second PDO strategies. If there is only one second PDO policy, then the one PDO policy is the final changed PDO policy. If there are a plurality of second PDO strategies, a modified PDO strategy may be determined from the difference between the battery temperature and the lower temperature limit.
As an alternative embodiment, if the difference between the battery temperature and the lower temperature limit is large (for example, larger than a third preset difference), the PDO policy with the highest temperature increase rate in the second PDO policy is determined as the modified PDO policy. If the difference between the battery temperature and the lower temperature limit is small (for example, smaller than a fourth preset difference), the PDO strategy with the lowest temperature rise rate in the second PDO strategy is determined as the changed PDO strategy. The third preset difference and the fourth preset difference may be reasonably set by combining with an actual application scenario, which is not limited in the embodiment of the present application.
For example, when the battery temperature is low, a PDO strategy with a high temperature rise rate may be selected, for example: 5V/3A.
In the foregoing embodiment, in addition to the implementation manner of presetting the corresponding relationship between the PDO policy and the temperature rise rate, the corresponding relationship between the PDO policy and the temperature rise rate corresponding to different preset environmental temperatures may also be adopted. In this embodiment, the control method further includes: and acquiring the current ambient temperature. Step 130 further comprises: and determining a changed PDO strategy according to the corresponding relation between the preset PDO strategy corresponding to the current environment temperature and the temperature rise rate, the battery temperature and the preset temperature range.
In this embodiment, the embodiment of step 130 may refer to the above embodiment that does not include the ambient temperature, except that before the above embodiment is executed, the corresponding relationship between the corresponding PDO strategy and the temperature increase rate needs to be determined according to the current ambient temperature. Such as: the corresponding relation between the PDO strategy and the temperature rise rate comprises the following steps: the corresponding relationship of the three environmental temperatures of 10 degrees, 20 degrees and 30 degrees, and the current environmental temperature is 20 degrees, the corresponding relationship between the PDO strategy corresponding to 20 degrees and the temperature rise rate is used in the subsequent determination process, and the specific determination method refers to the foregoing embodiment and is not described again here.
In this embodiment of the application, the ambient temperature may be collected by a temperature collection module in the device and then transmitted to the battery management system.
In the embodiment of the application, the corresponding relationship between the PDO strategy and the temperature rise rate may also correspond to different ambient temperatures, and thus a more reasonably changed PDO strategy may be determined based on the corresponding relationship between the PDO strategy corresponding to the current ambient temperature and the temperature rise rate.
After the changed PDO policy is determined in step 130, the battery is charged or discharged according to the changed PDO policy in step 140. Taking charging as an example, the battery management system may synchronize the changed PDO policy to the charging device, and the charging device changes the charging policy accordingly to charge the battery.
It will be appreciated that after the performance of step 140, the battery management system will continue to monitor the battery temperature, and if the battery temperature has been less than ideal, the PDO strategy will continue to be adjusted until after the battery temperature has stabilized below the ideal operating temperature.
In the embodiment of the application, the battery can be used as a power receiving end in the processes of charging and discharging; the charging equipment can be used as a charging terminal; the PDO strategy employed between the charging and receiving terminals (including charging and discharging) may be defined. Therefore, as an optional implementation manner, the control method further includes: determining PDO strategies supported by a charging end and a receiving end corresponding to a battery; the PDO policies that are each supported include a current PDO policy and/or a changed PDO policy.
The charging terminal corresponding to the battery may be a charging device, and the power receiving terminal corresponding to the battery may be the battery itself. Prior to charging, the battery management system may negotiate PDO policies with the charging device via a protocol that are both supported. Such as: the battery management system sends the PDO strategy supported by the battery to the charging equipment, the charging equipment sends the PDO strategy supported by the charging equipment to the battery management system, and the PDO strategies supported by the battery and the charging equipment are recorded through respective comparison.
Further, based on the supported PDO policies, subsequent real-time PDO policies (i.e., current PDO policies) and/or changed PDO policies may be defined. Such as: the current PDO strategy is a strategy in all supported PDO strategies; the changed PDO strategy is a strategy in the PDO strategies which are all supported; the current PDO strategy and the changed PDO strategy are both supported strategies in the PDO strategy and the like.
In the embodiment of the application, the current PDO strategy and/or the changed PDO strategy are/is limited by determining the PDO strategies supported by the charging end and the receiving end corresponding to the battery, so that the charging or discharging stability of the battery is improved.
In the embodiment of the application, if it is determined that the current PDO strategy needs to be changed, which indicates that the battery does not operate at the ideal temperature, the battery management system may also perform an early warning. Therefore, the control method further includes: and when the current PDO strategy is determined to be required to be changed, generating alarm information according to the battery temperature and a preset temperature range and outputting the alarm information.
In the embodiment, corresponding warning information is generated and output, so that a corresponding warning function can be achieved.
The warning information may include a battery temperature, a difference between the battery temperature and an upper temperature limit or a lower temperature limit, a risk coefficient, and the like. The risk factor may be determined from the difference between the battery temperature and the upper or lower temperature limit, such as: and presetting the relation between the risk coefficient and the difference, and determining the corresponding risk coefficient according to the relation after determining the difference. Generally, the larger the difference, the higher the hazard coefficient.
The manner of outputting the alarm information may be: and sending the alarm information to a processor of the equipment, and controlling a display module of the equipment to display the alarm information by the processor. Or the processor controls a voice module of the equipment to broadcast the alarm information in voice and the like.
In different application scenarios, different embodiments may be adopted in the above-mentioned generation manner of the alarm information and the output manner of the alarm information, which are only exemplary examples in the embodiment of the present application and do not constitute a limitation to the embodiment of the present application.
Based on the same inventive concept, please refer to fig. 2, an embodiment of the present application further provides a control apparatus 200 for battery temperature, which includes an obtaining module 210 and a processing module 220.
An obtaining module 210, configured to obtain a battery temperature under a current PDO policy; a processing module 220 for: judging whether the current PDO strategy needs to be changed or not according to the battery temperature and a preset temperature range; when the current PDO strategy is determined to be changed, the changed PDO strategy is determined according to the corresponding relation between the preset PDO strategy and the temperature rise rate, the battery temperature and the preset temperature range; and charging or discharging the battery according to the changed PDO strategy.
In an embodiment of the present application, the processing module 220 is further configured to: and when the current PDO strategy is determined to be required to be changed, generating alarm information according to the battery temperature and the preset temperature range and outputting the alarm information.
The processing module 220 is further specifically configured to: if the battery temperature is higher than the first preset temperature, determining the temperature rise rate corresponding to the current PDO strategy according to the corresponding relation; determining a first PDO strategy according to the corresponding relation and the temperature rise rate corresponding to the current PDO strategy; the temperature rise rate corresponding to the first PDO strategy is lower than that corresponding to the current PDO strategy; and determining a changed PDO strategy according to the first PDO strategy.
In this embodiment of the application, the processing module 220 is further specifically configured to: if the battery temperature is lower than the second preset temperature, determining the temperature rise rate corresponding to the current PDO strategy according to the corresponding relation; determining a second PDO strategy according to the corresponding relation and the temperature rise rate corresponding to the current PDO strategy; the temperature rise rate corresponding to the second PDO strategy is higher than that corresponding to the current PDO strategy; and determining the changed PDO strategy according to the second PDO strategy.
In this embodiment of the present application, the obtaining module 210 is further configured to: and acquiring the current ambient temperature. The processing module 220 is further specifically configured to: and determining a changed PDO strategy according to a preset corresponding relation between the PDO strategy corresponding to the current environment temperature and the temperature rise rate, the battery temperature and the preset temperature range.
In an embodiment of the present application, the processing module 220 is further configured to: performing a charge test or a discharge test on the battery through different PDO strategies at different environmental temperatures; recording temperature change information of the battery under different PDO strategies in the process of a charging test or a discharging test; and determining the corresponding relation between the PDO strategy corresponding to different environmental temperatures and the temperature rise rate according to the temperature change information of the battery.
In an embodiment of the present application, the processing module 220 is further configured to: determining PDO strategies supported by a charging end and a receiving end corresponding to the battery; the all-supported PDO policies include the current PDO policy and/or the changed PDO policy.
The control device 200 for the battery temperature corresponds to the control method for the battery temperature in the foregoing embodiment, and each functional module corresponds to each step of the control method for the battery temperature. Therefore, the implementation of each functional module refers to the implementation of each step in the foregoing embodiments, and the description is not repeated here.
Based on the same inventive concept, referring to fig. 3, an embodiment of the present application further provides a battery management system 300, including: a processor 310; and a memory 320 communicatively coupled to the processor; the memory 320 stores instructions executable by the processor, and the instructions are executed by the processor 310, so that the processor 310 can execute the method for controlling the battery temperature according to the embodiment of the present disclosure.
Wherein the processor 310 and the memory 320 are electrically connected directly or indirectly to enable data transmission or interaction. For example, electrical connections between these components may be made through one or more communication or signal buses. The control method of the battery temperature includes at least one software functional module that may be stored in the memory 320 in the form of software or firmware (firmware).
The processor 310 may be an integrated circuit chip having signal processing capabilities. Processor 310 may be a general-purpose Processor including a CPU (Central Processing Unit), an NP (Network Processor), and the like; but may also be a digital signal processor, an application specific integrated circuit, an off-the-shelf programmable gate array or other programmable logic device, discrete gate or transistor logic, discrete hardware components. Which may implement or perform the methods, steps, and logic blocks disclosed in the embodiments of the present application. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
The memory 320 may store various software programs and modules, such as program instructions/modules corresponding to the method and apparatus for controlling the battery temperature provided by the embodiments of the present application. The processor 310 executes various functional applications and data processing by running software programs and modules stored in the memory 320, so as to implement the technical solution in the embodiment of the present application.
The Memory 320 may include, but is not limited to, a RAM (Random Access Memory), a ROM (Read Only Memory), a PROM (Programmable Read-Only Memory), an EPROM (Erasable Read-Only Memory), an EEPROM (electrically Erasable Read-Only Memory), and the like.
The battery management system 300 may also include more components than those shown in fig. 3, and the structure shown in fig. 3 does not limit the embodiments of the present application, such as: the battery management system 300 also includes a communication module for enabling communication with the external module as well as the internal module.
In the embodiment of the present application, an electronic device is further provided, which includes a battery and the battery management system 300 shown in fig. 3, and further includes a display module, a communication module, an input/output module, and other basic structures or components of the electronic device.
In an embodiment of the present application, a readable storage medium is further provided, where a computer program is stored on the readable storage medium, and when the computer program is executed by a computer, the method for controlling the temperature of the battery provided in the embodiment of the present application is executed.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units is only one logical division, and there may be other divisions when actually implemented, and for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection of devices or units through some communication interfaces, and may be in an electrical, mechanical or other form.
In addition, units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional modules in the embodiments of the present application may be integrated together to form an independent part, or each module may exist alone, or two or more modules may be integrated to form an independent part.
In this document, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions.
The above description is only an example of the present application and is not intended to limit the scope of the present application, and various modifications and changes may be made to the present application 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 (10)

1. A method for controlling battery temperature, comprising:
acquiring the battery temperature under the current PDO strategy;
determining whether the current PDO strategy needs to be changed or not according to the battery temperature and a preset temperature range;
when the current PDO strategy is determined to be changed, the changed PDO strategy is determined according to the corresponding relation between the preset PDO strategy and the temperature rise rate, the battery temperature and the preset temperature range;
and charging or discharging the battery according to the changed PDO strategy.
2. The control method according to claim 1, characterized by further comprising:
and when the current PDO strategy is determined to be required to be changed, generating alarm information according to the battery temperature and the preset temperature range and outputting the alarm information.
3. The control method according to claim 1, wherein the upper temperature limit of the preset temperature range is a first preset temperature; when the current PDO strategy is determined to be required to be changed, the changed PDO strategy is determined according to the corresponding relation between the preset PDO strategy and the temperature rise rate, the battery temperature and the preset temperature range, and the method comprises the following steps:
if the battery temperature is higher than the first preset temperature, determining the temperature rise rate corresponding to the current PDO strategy according to the corresponding relation;
determining a first PDO strategy according to the corresponding relation and the temperature rise rate corresponding to the current PDO strategy; the temperature rise rate corresponding to the first PDO strategy is lower than that corresponding to the current PDO strategy;
and determining a changed PDO strategy according to the first PDO strategy.
4. The control method according to claim 1, wherein a lower temperature limit of the preset temperature range is a second preset temperature; when the current PDO strategy is determined to be required to be changed, the changed PDO strategy is determined according to the corresponding relation between the preset PDO strategy and the temperature rise rate, the battery temperature and the preset temperature range, and the method comprises the following steps:
if the battery temperature is lower than the second preset temperature, determining the temperature rise rate corresponding to the current PDO strategy according to the corresponding relation;
determining a second PDO strategy according to the corresponding relation and the temperature rise rate corresponding to the current PDO strategy; the temperature rise rate corresponding to the second PDO strategy is higher than that corresponding to the current PDO strategy;
and determining the changed PDO strategy according to the second PDO strategy.
5. The control method according to claim 1, characterized by further comprising:
acquiring the current environment temperature;
the PDO strategy determining the change according to the correspondence between the preset PDO strategy and the temperature rise rate, the battery temperature, and the preset temperature range further includes:
and determining a changed PDO strategy according to a preset corresponding relation between the PDO strategy corresponding to the current environment temperature and the temperature rise rate, the battery temperature and the preset temperature range.
6. The control method of claim 5, wherein prior to said obtaining the battery temperature under the current PDO strategy, the control method further comprises:
performing a charging test or a discharging test on the battery through different PDO strategies at different ambient temperatures;
recording temperature change information of the battery under different PDO strategies in the process of a charging test or a discharging test;
and determining the corresponding relation between the PDO strategy corresponding to different environmental temperatures and the temperature rise rate according to the temperature change information of the battery.
7. The control method according to claim 1, characterized by further comprising:
determining PDO strategies supported by a charging end and a receiving end corresponding to the battery; the all-supported PDO policies include the current PDO policy and/or the changed PDO policy.
8. A battery temperature control apparatus, comprising:
the acquisition module is used for acquiring the battery temperature under the current PDO strategy;
a processing module to:
judging whether the current PDO strategy needs to be changed or not according to the battery temperature and a preset temperature range; when the current PDO strategy is determined to be changed, the changed PDO strategy is determined according to the corresponding relation between the preset PDO strategy and the temperature rise rate, the battery temperature and the preset temperature range; and charging or discharging the battery according to the changed PDO strategy.
9. A battery management system, comprising:
a processor; and a memory communicatively coupled to the processor;
wherein the memory stores instructions executable by the processor to enable the processor to perform the method of controlling battery temperature of any one of claims 1 to 7.
10. A readable storage medium, characterized in that the readable storage medium has stored thereon a computer program which, when executed by a computer, executes the method of controlling the temperature of a battery according to any one of claims 1 to 7.
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