CN113889680A - Battery charging method and device, and storage medium - Google Patents
Battery charging method and device, and storage medium Download PDFInfo
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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
- H01M10/44—Methods for charging or discharging
- H01M10/443—Methods for charging or discharging in response to temperature
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- 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
- H02J7/0069—Charging or discharging for charge maintenance, battery initiation or rejuvenation
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- 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
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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 disclosure relates to a battery charging method and device and a storage medium. The method is applied to the electronic equipment and comprises the following steps: detecting the charging temperature of the electronic equipment in the process of charging the battery; determining the temperature change rate of the electronic equipment according to the charging temperature; and adjusting the charging power of the battery charging according to the temperature change rate. Through the technical scheme of the embodiment of the disclosure, when the battery is charged, the charging power is adjusted in real time according to the temperature change rate of the electronic equipment, and the damage to the battery and the electronic equipment caused by overhigh temperature is reduced.
Description
Technical Field
The present disclosure relates to the field of electronic technologies, and in particular, to a method and an apparatus for charging a battery, and a storage medium.
Background
With the development of wireless and mobile electronic devices, the performance requirements of rechargeable batteries applied to various electronic devices are also continuously increasing. In charging a rechargeable battery, the battery is often directly charged in a state where the battery is located inside an electronic device. During the charging process, the battery generates heat, so that the temperature of the electronic device is increased, the performance of the electronic device is affected, and even components in the electronic device may be damaged. Therefore, how to reduce the overheating of temperature while meeting the requirement of rapid charging in the process of charging the battery becomes one of the technical problems to be solved in the art.
Disclosure of Invention
The disclosure provides a battery charging method and device and a storage medium.
According to a first aspect of the embodiments of the present disclosure, there is provided a method for charging a battery, the method being applied to an electronic device, including:
detecting the charging temperature of the electronic equipment in the process of charging the battery;
determining the temperature change rate of the electronic equipment according to the charging temperature;
and adjusting the charging power of the battery charging according to the temperature change rate.
In some embodiments, said adjusting the charging power of said battery charging according to said rate of temperature change comprises:
determining corresponding charging power according to the temperature change rate and the charging temperature;
and charging the battery with the corresponding charging power.
In some embodiments, said determining a corresponding charging power from said rate of temperature change and said charging temperature comprises:
if the charging temperature is within a maximum temperature range for charging the battery and the temperature change rate is less than a predetermined threshold, maintaining the charging power of the current charge.
In some embodiments, the rate of temperature change comprises: rate of temperature rise; determining a corresponding charging power according to the temperature change rate and the charging temperature includes:
if the charging temperature is within a maximum temperature range for charging the battery and the temperature rise rate is greater than a predetermined threshold, then the charging power is reduced.
In some embodiments, said determining a corresponding charging power from said rate of temperature change and said charging temperature further comprises:
and if the charging temperature is less than the lower temperature limit of the maximum temperature range, increasing the charging power of the battery according to the temperature change rate, or determining the maximum rated charging power of the battery as the actual charging power of the battery.
In some embodiments, said adjusting the charging power of said battery charging according to said rate of temperature change comprises:
when the temperature change rate is detected to be in a first interval, and the lower limit of the first interval is greater than or equal to the upper limit of a second interval, maintaining the current charging power for a preset time;
after maintaining the current charging power for the predetermined period of time, reducing the current charging power until the temperature change rate is reduced to the second interval; when the temperature change rate is in the second interval, the charging temperature is reduced or maintained unchanged.
In some embodiments, said adjusting the charging power of said battery charging according to said rate of temperature change comprises:
when the charging temperature is larger than a temperature threshold value for triggering power adjustment, adjusting the charging power for charging the battery according to the temperature change rate;
maintaining a current charge power when the charge temperature is less than or equal to the temperature threshold.
In some embodiments, the detecting the charging temperature of the electronic device during the charging of the battery includes:
detecting a temperature value of at least one position in the electronic equipment in the process of charging the battery;
and determining the charging temperature of the electronic equipment according to the different weights of the positions and the temperature value.
According to a second aspect of the embodiments of the present disclosure, there is provided a charging apparatus for a battery, the apparatus being applied to an electronic device, including:
the detection module is used for detecting the charging temperature of the electronic equipment in the process of charging the battery;
the first determining module is used for determining the temperature change rate of the electronic equipment according to the charging temperature;
and the adjusting module is used for adjusting the charging power of the battery charging according to the temperature change rate.
In some embodiments, the adjustment module comprises:
the first determining submodule is used for determining corresponding charging power according to the temperature change rate and the charging temperature;
and the charging module is used for charging the battery with the corresponding charging power.
In some embodiments, the first determining submodule is specifically configured to:
if the charging temperature is within a maximum temperature range for charging the battery and the temperature change rate is less than a predetermined threshold, maintaining the charging power of the current charge.
In some embodiments, the rate of temperature change comprises: rate of temperature rise; the first determining submodule is specifically configured to:
if the charging temperature is within a maximum temperature range for charging the battery and the temperature rise rate is greater than a predetermined threshold, then the charging power is reduced.
In some embodiments, the first determining sub-module is further configured to:
and if the charging temperature is less than the lower temperature limit of the maximum temperature range, increasing the charging power of the battery according to the temperature change rate, or determining the maximum rated charging power of the battery as the actual charging power of the battery.
In some embodiments, the adjustment module comprises:
the first maintenance submodule is used for maintaining the current charging power for a preset time when the temperature change rate is detected to be in a first interval and the lower limit of the first interval is greater than or equal to the upper limit of a second interval;
a first adjusting submodule, configured to decrease the current charging power until the temperature change rate decreases to the second interval after maintaining the current charging power for the predetermined time period; when the temperature change rate is in the second interval, the charging temperature is reduced or maintained unchanged.
In some embodiments, the adjustment module comprises:
the second adjusting submodule is used for adjusting the charging power of the battery according to the temperature change rate when the charging temperature is larger than a temperature threshold value for triggering power adjustment;
a maintaining sub-module for maintaining a current charging power when the charging temperature is less than or equal to the temperature threshold.
In some embodiments, the detection module comprises:
the detection submodule is used for detecting the temperature value of at least one position in the electronic equipment in the process of charging the battery;
and the second determining submodule is used for determining the charging temperature of the electronic equipment according to the different weights of the positions and the temperature value.
According to a third aspect of embodiments of the present disclosure, there is provided a charging apparatus for a battery, the apparatus including at least: a processor and a memory for storing executable instructions operable on the processor, wherein:
the processor is used for executing the executable instructions, and the executable instructions execute the steps in the charging method of any battery.
According to a fourth aspect of embodiments of the present disclosure, there is provided a non-transitory computer-readable storage medium having stored therein computer-executable instructions that, when executed by a processor, implement the steps in the method of charging a battery of any of the above.
The technical scheme provided by the embodiment of the disclosure can have the following beneficial effects: through the technical scheme of the embodiment of the disclosure, when the battery is charged, the charging power is adjusted in real time according to the temperature change rate of the electronic equipment, on one hand, the charging power can be timely reduced under the condition that the charging temperature rises too fast, the rising of the charging temperature is slowed down, the influence on the electronic equipment or the battery caused by the fact that the charging temperature exceeds a safety range is further reduced, and the damage to the electronic equipment caused by overhigh temperature is reduced. On the other hand, compared with a mode of reducing the charging power after the charging temperature is too high, the change of the charging temperature can be more stable. Meanwhile, the charging power is adjusted according to the temperature change rate, and compared with the method for adjusting the charging power according to the temperature value, the waste caused by the large-amplitude change of the charging power can be reduced, so that the proper charging power is always kept in the charging process, and the faster charging speed is further maintained.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
FIG. 1 is a flow chart illustrating a method of charging a battery according to an exemplary embodiment;
FIG. 2 is a graph illustrating temperature variation for adjusting charging power according to temperature values, according to an exemplary embodiment;
FIG. 3 is a graph illustrating a power variation for adjusting charging power according to temperature values, according to an example embodiment;
FIG. 4 is a schematic diagram illustrating a charge level adjusting a charging power according to a temperature value according to an exemplary embodiment;
FIG. 5 is a graph illustrating temperature variation for adjusting charging power according to temperature values, according to an example embodiment;
FIG. 6 is a graph illustrating temperature variation and a graph illustrating power variation for adjusting charging power according to a rate of temperature variation, according to an exemplary embodiment;
FIG. 7 is a schematic diagram illustrating a comparison of adjusting charging power according to a rate of temperature change and adjusting charging power according to a temperature value, according to an exemplary embodiment;
fig. 8 is a schematic diagram illustrating a structure of a charging apparatus for a battery according to an exemplary embodiment;
FIG. 9 is a block diagram illustrating a physical structure of an electronic device in accordance with an exemplary embodiment.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the invention, as detailed in the appended claims.
Fig. 1 is a flowchart illustrating a method for charging a battery according to an exemplary embodiment, where the method is applied to an electronic device, as shown in fig. 1, and includes the following steps:
step S101, detecting the charging temperature of the electronic equipment in the process of charging the battery;
step S102, determining the temperature change rate of the electronic equipment according to the charging temperature;
and step S103, adjusting the charging power of the battery charging according to the temperature change rate.
In the embodiments of the present disclosure, the electronic device is any device powered by a rechargeable battery, including a household electronic device, a vehicle-mounted device, and the like. For example, mobile phones, notebook computers, smart wearable devices, car audio devices, and the like. When the battery of the electronic equipment is charged, the battery can be taken out of the electronic equipment and charged through an external charging power supply, and the battery can also be directly charged through a charging interface of the electronic equipment when the battery is positioned in the electronic equipment. If the battery is taken out and charged by an external charging power supply, the charging temperature may be the temperature on the surface of the battery or in the battery. The charging temperature here refers to the temperature of the electronic device detected during charging, and when the battery is located inside the electronic device, the charging temperature is influenced by the charging of the battery, and also by the ambient temperature and the operating state of the electronic device.
During the charging of the battery, a temperature rise phenomenon occurs due to rapid movement of internal charge, and the temperature rise may be faster or the temperature of the battery may be higher as the charging power is larger. In addition, the temperature of the battery is also affected by the environment, the quality of the battery itself, and the battery charge. Therefore, if charging is performed while maintaining a constant charging power during charging, the temperature of the battery may be continuously increased, and if the temperature of the battery is too high, the performance of the electronic device may be easily affected, and the battery may be exposed to a risk of burning or explosion. Therefore, during the charging process of the battery, the temperature of the electronic device needs to be controlled to be maintained within a safe range.
In the embodiment of the disclosure, the temperature change in the charging process is monitored by detecting the charging temperature of the electronic device. Here, the charging temperature may be a temperature of a location in the electronic device where the temperature sensor is provided, for example, a surface of the battery, a location where the charging chip is located, a motherboard, or an arbitrary location within the electronic device. The charging temperature may also be an average temperature of temperature parameters, or a weighted average temperature, of a plurality of different locations of the electronic device. In summary, the charging temperature is the temperature of the electronic device during charging. Through the charging temperature, the temperature change rate of the electronic device can be calculated in real time, and the temperature change rate can comprise: acceleration of temperature. For example, from the charging temperature profile, the temperature rate of change is determined from the slope value.
Further, an upper limit value of the charging temperature or the charging power may be set. When the charging temperature reaches the upper temperature limit, the charging power is not increased even if the temperature change rate is low; or when the charging power reaches the upper power limit, the charging power is not increased even if the temperature change rate is low. In this way, the charging temperature is prevented from increasing continuously as the charging power increases continuously.
In the embodiment of the disclosure, the charging power is adjusted according to the temperature change rate, so that when the temperature rises too fast, the charging power is reduced, and then the rise of the temperature is slowed down, or the charging power is increased when the temperature rise rate is lower, and then the charging speed is increased. The temperature change rate value or the interval of the temperature change rate and the corresponding value of the charging power can be preset, and different charging powers can be adopted in intervals of different temperature change rates. Thus, compared with the charging power adjustment according to the temperature value, the large change of the charging temperature can be reduced. The charging is performed at a high charging power as much as possible, and the situation in which the charging temperature rises too fast to be lowered is reduced.
Therefore, by the method of the embodiment of the present disclosure, the temperature change rate can be changed by adjusting the charging power while maintaining a high charging power, thereby enabling the charging temperature to change in a small range. So, can reduce the interference to the electronic equipment performance under the battery is in the condition of safe state, simultaneously, can also accomplish with faster speed and charge, promoted charging efficiency.
In some embodiments, the adjusting the charging power for charging the battery according to the temperature change rate includes:
determining corresponding charging power according to the temperature change rate and the charging temperature;
and charging the battery with the corresponding charging power.
In the embodiment of the present disclosure, the charging power may be correspondingly adjusted according to two terms, namely, the temperature change rate and the charging temperature, as parameters. The temperature value can be divided into at least two temperature intervals, and different charging power adjustment strategies are adopted in different temperature intervals. A charging power adjustment strategy comprising: and adjusting the charging power according to the corresponding relation between the temperature change rate and the charging power. The different temperature ranges have different corresponding relationships. The correspondence relationship here may be a discrete correspondence relationship or a continuous correspondence relationship. For example, the correspondence may be characterized by a relationship curve between the temperature change rate and the charging power.
In general, the lower the mean temperature of the temperature interval is, the smaller the power drop between the temperature increase rate indicated by the correspondence and the charging power adjustment is; and/or the correspondence indicates a greater power rise between the rate of temperature decrease and the charging power adjustment.
For example, the charging temperature is divided into three sections, and the temperature ranges of the first section, the second section, and the third section are sequentially increased. And when the charging temperature belongs to the first interval, charging according to the fixed charging power. For example, charging is performed at the maximum rated charging power. And when the charging temperature belongs to the second interval, charging the determined charging power according to the first relation curve of the temperature change rate and the charging power. And when the charging temperature belongs to a third interval, charging according to the determined charging power according to a second relation curve of the temperature and the charging power. The first relation curve is different from the second relation curve, for example, the change rate of the first relation curve is smaller than that of the second relation curve. In this way, the charging power may not be adjusted in the first interval, and the charging power may be fine-tuned according to the temperature change rate in the second interval, so that the temperature is maintained in the second interval as much as possible; and in the third interval, the charging power is adjusted in a larger range according to the temperature change rate, so that the charging temperature is prevented from continuously rising above the safe upper temperature limit.
The charging power can be adjusted in real time according to the change curve of the temperature value, namely: a continuous relation curve is set between the temperature change rate and the charging power. For example: and calculating the temperature change rate at each sampling point of the charging temperature, and adjusting the charging power according to the relation curve.
Therefore, the charging power is determined together according to the temperature change rate and the charging temperature, the charging power can be more finely adjusted, and the large-amplitude change of the charging temperature is reduced.
Besides, in an embodiment, the adjusting the charging power according to the operation condition of the electronic device includes: detecting the operating power of the electronic equipment; detecting the residual capacity of the current battery; and determining the minimum power value of the charging power according to the running power and/or the residual capacity of the battery.
In the process of adjusting the charging power according to the temperature change rate and the charging temperature, if the charging power is lower than the minimum power value, a prompt message is sent out, or all or part of background processes running on the electronic equipment are closed. Wherein, the reminding information can comprise: and the display picture or audio information is used for reminding the user to close part or all of the application programs or reminding the user to close the charging device.
Therefore, the electronic equipment can be charged in the operation process of the electronic equipment, and the adjustment of the charging power is determined through the parameters, so that the influence of heat generated by the operation and the charging of the electronic equipment on the performance and the safety of the electronic equipment is reduced.
In another embodiment, the charging protocol may be adjusted to charge at different standards depending on the rate of temperature change and the charging temperature. For example, when the temperature change rate is lower than a predetermined range and the charging temperature is lower than the predetermined range, the charging is performed using a fast charging protocol; and when the temperature change rate is larger than a preset range or the charging temperature is larger than the preset range, charging by adopting a standard charging protocol. Like this, can balance the security of charging and quick charge's demand, promote the holistic efficiency of charging process and security performance.
In some embodiments, the determining the corresponding charging power according to the temperature change rate and the charging temperature includes:
if the charging temperature is within the maximum temperature range for charging the battery and the temperature change rate is less than a predetermined threshold, the charging power for the current charge is maintained.
Here, the maximum temperature range is a temperature range below a maximum temperature value at which safety of the battery and the electronic device is maintained during charging of the battery. In the charging process, if the charging temperature is in the temperature range, the temperature is required to be maintained as far as possible and is not increased, otherwise, the temperature is easily increased to be higher than the maximum temperature value, and the performance stability and the safety of the battery and the electronic equipment are threatened.
If the temperature change rate is small in the maximum temperature range, the charging temperature is slowly increased or not increased, and the possibility of threatening the performance stability and safety of the battery and the electronic equipment is low. Meanwhile, the charging temperature is higher, so that the corresponding charging power is higher, and the charging speed can be higher. Therefore, the current charging power can be maintained at this time, and rapid charging is achieved. Of course, if it is detected that the battery is fully charged, the charging power may be reduced or the charging may be directly stopped so that the charging temperature is reduced.
In some embodiments, the rate of temperature change comprises: rate of temperature rise; determining a corresponding charging power according to the temperature change rate and the charging temperature, comprising:
if the charging temperature is within a maximum temperature range for charging the battery and the temperature rise rate is greater than a predetermined threshold, the charging power is reduced.
In the embodiment of the present disclosure, if the charging temperature is within the maximum charging range and the charging temperature continues to rise at a fast speed, the charging temperature may exceed the safe maximum temperature value in a short time, which threatens the performance stability and safety of the battery and the electronic device. Therefore, at this time, the charging power needs to be reduced to slow down the rise of the charging temperature, and even to enable the charging temperature to be properly reduced, so that the charging temperature is maintained below the maximum temperature value, and the influence on the electronic device and the battery is reduced.
In some embodiments, the determining the corresponding charging power according to the temperature change rate and the charging temperature further includes:
if the charging temperature is less than the lower temperature limit of the maximum temperature range, the charging power of the battery is increased or the maximum rated charging power of the battery is determined as the actual charging power of the battery according to the rate of temperature change.
In the embodiment of the present disclosure, when the charging temperature is low, even if a high charging power is used or the temperature rising speed is high, the performance of the battery and the electronic device is not affected in a short time. Therefore, when the charging temperature is within the interval of the lower temperature limit of the maximum temperature, the charging power can be adjusted according to the corresponding relation between the temperature change rate and the charging power, and the situation that the temperature rises too fast is reduced, and meanwhile, the quick charging is realized by the charging power as much as possible. Or directly charging with the maximum rated charging power of the battery until the charging temperature is raised to the maximum temperature range, and then adjusting the charging power according to the corresponding relation between the temperature change rate and the charging power in the maximum temperature range.
In this way, when the charging temperature of the electronic device is low, charging can be performed with a high charging power, so that the battery can be charged quickly. Therefore, if the battery has more electric quantity or the ambient temperature is lower, the charging can be completed quickly in a short time, and the charging temperature cannot rise to an excessively high temperature in the charging process. By the method, the charging speed is improved, and the performance and safety of the battery and the electronic equipment cannot be influenced by overhigh charging temperature in the charging process.
In some embodiments, said adjusting the charging power of said battery charging according to said rate of temperature change comprises:
when the temperature change rate is detected to be in a first interval, and the lower limit of the first interval is greater than or equal to the upper limit of a second interval, maintaining the current charging power for a preset time;
after maintaining the current charging power for the predetermined period of time, reducing the current charging power until the temperature change rate is reduced to the second interval; when the temperature change rate is in the second interval, the charging temperature is reduced or maintained unchanged.
Here, the temperature change rate during charging may be divided into a plurality of rate sections. The first interval may be any one of a plurality of preset temperature change rate intervals in which the temperature is in an increased state, and the second interval may be a preset minimum temperature change rate interval, for example, a rate value of the temperature change rate is less than or equal to 0. When the change rate of the charging temperature is in the second interval, the charging temperature is reduced or maintained unchanged, so that the charging power can not be reduced any more, and even the charging power can be increased again.
When the current temperature change rate belongs to the first interval, the charging power can be maintained for a preset time period, and the temperature can be increased along with the time period. After maintaining the charging power for a predetermined period of time, if the temperature continues to rise without decreasing the charging power, the upper limit of the temperature may be exceeded. Therefore, after a predetermined period of time, the charging power can be reduced, and the temperature change rate can be reduced, so that the temperature slowly rises. At this time, the temperature change rate enters the next rate interval, and whether the interval is the second interval is continuously judged.
If the next rate interval is not the second interval, the temperature will continue to rise, so the above steps can be repeated, and after maintaining the current charging power for a predetermined time period, the charging power is reduced.
If the next speed interval is the second interval, the temperature can be kept unchanged or reduced, the safety performance is not affected any more, and therefore the current charging power can be maintained all the time subsequently. However, when the temperature change rate is in the second interval, the charging power is also in a low state, and the requirement of fast charging may not be met.
Therefore, in the embodiment of the present disclosure, when the temperature change rate is in the second interval, the current charging power may be maintained for a predetermined time period, and after the predetermined time period, the charging power may be increased.
Therefore, the charging power is maintained for a period of time in the second interval, so that the temperature can be gentle and even reduced, and then the charging power is increased, so that the temperature cannot be too high in the subsequent charging process for a period of time. Through the different processing modes of the multiple sections, the temperature can not fluctuate greatly in the charging process and can be always kept in a safe range. Meanwhile, the situation of too slow charging caused by excessively reducing the charging power can be reduced, so that the whole charging process is a process of dynamically balancing the charging power and the temperature. In some embodiments, the adjusting the charging power for charging the battery according to the temperature change rate includes:
when the temperature change rate is larger than the rate threshold value for triggering power adjustment, adjusting the charging power for charging the battery according to the temperature change rate;
when the rate of temperature change is less than or equal to the rate threshold, the current charge power is maintained.
In the embodiment of the present disclosure, the function of adjusting the charging power according to the temperature change rate may be performed only when the charging temperature is within a specified range. In other cases, the charging is performed at a default charging power, such as a maximum rated charging power.
In this way, the charging power can be adjusted when temperature control is required. In the case where the ambient temperature is low or the heat dissipation performance of the electronic device is good, the maximum rated charging power does not cause an excessively rapid increase in temperature, and therefore, adjustment is not required.
In some embodiments, the detecting the charging temperature of the electronic device during the charging of the battery includes:
detecting a temperature value of at least one location in the electronic device during charging of the battery;
and determining the charging temperature of the electronic equipment according to the weights and the temperature values of the different positions.
In the embodiment of the present disclosure, temperature may be affected at different positions in the electronic device during the battery charging process, and therefore, the charging temperature may be determined according to a temperature value at one position in the electronic device, or according to temperature values at multiple positions in the electronic device. For example, during charging, the battery surface, the charging chip, the electronic device motherboard chip, and the charging interface are most prone to heat generation and tend to degrade performance when the temperature is too high. Therefore, temperature sensors may be provided at these locations to detect temperature values.
Different weights may be set for different positions according to the degree of influence of the temperature increase on the different positions or the degree of influence of the temperature at the different positions on the whole electronic device, and then the charging temperature may be determined according to the weight at each position and the corresponding temperature value. For example, the temperature values at different positions are multiplied by the weight and then summed to obtain the charging temperature; or the temperature values of different positions are weighted and averaged to obtain the charging temperature.
Therefore, the charging process of the battery can be controlled according to the charging temperature determined by the actual conditions and the requirements of different positions of the electronic equipment. Therefore, the influence on the performance and safety of the battery or the electronic equipment caused by overhigh local temperature of the position or the area which cannot be detected in the charging process can be reduced.
The disclosed embodiments also provide the following examples:
electronic equipment (any equipment needing a battery, such as a mobile phone, a computer and the like) and an automobile battery and the like need to charge the battery, and the battery can obviously generate heat when the battery is charged at high power; if the battery temperature is too high, a measure of charging and reducing power is taken to prevent the battery temperature from continuously increasing; the reduced power will undoubtedly increase the charging time of the battery; therefore, the method is pursued by various industries and families in the aspect of battery charging under the condition of ensuring that the temperature of the battery does not exceed the standard and the full charging time of the battery is shortest.
When the battery is charged for a desired charging time, the power needs to be increased; if the battery is expected to generate heat less seriously, the battery needs to be charged under non-high power; the two are restricted with each other, so the maximum power when the battery temperature does not exceed the standard needs to be searched for charging.
In one embodiment, NTC (Negative Temperature Coefficient) thermocouples or thermistors are mounted at various locations on a circuit board or the like of an electronic device for acquiring temperatures at the location, which reflect the Temperature of certain chips or certain areas. Determining the temperature of the device by giving a certain weight to each temperature; the NTC temperatures correspond to different module temperatures, for example, for the interior of a mobile phone, NTC for measuring a camera module, NTC for measuring a CPU (central processing unit), NTC for measuring a charging chip or a charging battery, and the like, the final device temperature is obtained by giving a certain proportion to different NTC temperatures, and comprehensively considering the weights to obtain the temperature of the device, so that the grade of using a temperature control strategy is determined according to the device temperature. An example is as follows:
the rated charging power of the electronic device is substantially the maximum charging power during the charging process of the electronic device. Fig. 2 is a schematic diagram of a temperature variation curve in the charging process of the electronic device, and fig. 3 is a schematic diagram of a charging power adjustment curve in the charging process. As shown in fig. 2 and 3, in the early stage of charging, the overall temperature of the device is low, the initial temperature is assumed to be t0, the "temperature control strategy" is not triggered, and the charging power is 40W charging (40W charging is referred to as the zeroth order of the "temperature control strategy"). As charging progresses, the temperature of the electronic device gradually increases until the temperature rises to t2, the first stage of the "temperature control strategy" is triggered, and the charging power is reduced by one step to 30W. After 30W, the cases are divided into 2 types: (1) when the device is charged by 30W, the heat generation of the device is still larger than the heat dissipation, the temperature of the device is still increased, and only the increasing speed is not as fast as before; when the temperature rises to t3, triggering a second stage of a temperature control strategy, reducing the charging power to 20W, and so on, if the temperature of the 20W charging complete machine is still increased, triggering a third stage power reduction strategy along with the rise of the temperature; (2) when the temperature drops below the temperature recovery threshold t1 of 40W charging, the charging power is recovered from the current 30W to 40W, at this time, the zero-order charging can be continued, the temperature is increased again, and the temperature exceeds t1 again, and the first-stage 30W charging is triggered again; similarly, no matter the current charging is in the stage I of the temperature control strategy, when the heat dissipation is larger than the heat generation and the temperature of the whole machine is reduced, the higher-stage charging power is recovered, the temperature is increased again, and the power reduction gear is triggered again.
The temperature of the electronic device, i.e., the charging temperature T in the above embodiment, may be determined according to T ═ a1 × -NTC 1+ a2 × -NTC 2+ a3 × -NTC 3+ a4 × -NTC 4+ … …. The NTC1 and NTC2 … … are temperature measurement values of different positions, and a1 and a2 … … are weights of the different positions. The weight obtaining method can be adjusted by giving an initial weight value through simulation and then actually measuring. It should be noted that the temperature is simulated by assigning a certain weight to a plurality of NTCs, and the maximum temperature of the whole machine is generally simulated. Of course, the temperature of each local part of the whole machine can be simulated more accurately according to actual requirements, and the simulation method is determined according to requirements.
The battery has a limited capacity, for example, x mAh (milliampere hours), and then the battery can be fully charged with x mA (milliampere) current for one hour. The charged voltage was multiplied, i.e., the charged power of x1 mW (milliwatt) was used, and the full charge was obtained within one hour. If P W (watts) of charging power is used to charge the battery, the battery may be fully charged for x1/P hours. The battery capacity during the charging process is the area value of the area enclosed by the power variation curve and the coordinate axis as shown in fig. 4.
If the strategy of adjusting the charging power according to the temperature is adopted, the temperature change of the whole charging process is a steady-state process, and the temperature change is oscillating within a steady-state range, as shown in fig. 5.
In the disclosed embodiment, as shown in fig. 6, the charging power is determined using the rate of change of temperature, i.e., the "temperature rise slope". Since the temperature rises faster and the rate of change of temperature is higher at higher charging powers, a temperature control strategy may be triggered to reduce the charging power. As shown in fig. 6, the initial charging power is 40w, and when the temperature change rate reaches k1, the adjustment of the power is triggered to decrease to 36 w. At this point, the temperature continues to rise, but the rate of temperature change gradually decreases. When the temperature change rate is reduced to k2(k3 or k4), the charging power is continuously reduced, so that the temperature change rate is reduced, and finally the charging temperature is maintained at a stable temperature value below the upper temperature limit as much as possible, and the temperature is not directly reduced too fast, so that the temperature oscillation is avoided, and the charging efficiency is reduced.
When the above fig. 6 and fig. 3 are stacked, a comparison image shown in fig. 7 can be seen, as shown in fig. 7, the determination of the optimal charging power cannot be achieved by adjusting the charging power only according to the temperature value, and the temperature can fluctuate within the maximum temperature range only through the jump of large power and small power. And the charging power is adjusted according to the temperature change rate, so that the stepped fine adjustment of the charging power can be realized, and the charging temperature is gradually balanced to reach a stable state with small fluctuation or even no fluctuation. In addition, as can be seen from the shaded area, the power of the scheme of adjusting the charging power by using the temperature change rate can be increased more quickly, so that the charging can be completed in a shorter time.
The charging process may be as follows:
1) starting charging, and rapidly increasing the charging power to the maximum required power, for example, 40W is the maximum required power; temperature and rate of temperature change are both detected at the moment, but do not function when the trigger condition is not reached.
2) Under the condition of a temperature trigger temperature threshold t1, a temperature change rate judgment mechanism starts to function, and a temperature and temperature change rate dual judgment mechanism is carried out;
namely, the requirements are as follows: before the temperature change rate starts to work, the maximum power must reach the maximum required power of 40W; the maximum required power is prevented from being not reached, and the power is reduced due to triggering temperature control, so that the maximum required power can not be reached;
3) the relationship shown in FIG. 7 is k1> k2> k3> k 4;
when the temperature change rate k is greater than k1, the charging power is reduced to the next power level 37W; if the temperature change rate k is still larger than k1 at 37W and at intervals (the time can be set), the charging power gear is continuously reduced; it is assumed here that the rate of temperature change at 37W is less than k 1;
at 37W, at intervals (the time duration can be set), when the temperature change rate k is detected to be greater than the threshold k2 (less than k1), the charging power is reduced to the next power level 34W; if the temperature change rate k is still larger than k2 at 34W and at intervals (the time can be set), the charging power gear is continuously reduced; it is assumed here that the rate of temperature change at 34W is less than k 2;
by analogy, finally, the temperature at steady state is just kept at the maximum allowable temperature value, and the charging time is shortest.
In fig. 7, k1, k2, k3 and k4 are slope change points for adjusting the charging power according to the temperature change rate, respectively, and correspond to different temperature change rates; t1, t2 and t3 are different temperature thresholds for adjusting the charging power according to the temperature values, respectively. Taking a mobile phone as an example, assuming that the maximum charging temperature of the mobile phone is 41 ℃, 39 ℃ may be taken as t1, and 40 ℃ may be taken as t 2. In practical application, the change gear of the charging power can be set more finely, and the division of the temperature change rate also corresponds to more stages, which is not limited herein and can be determined according to the type of the electronic device and the actual heat dissipation condition. In addition, the temperature change rate can be calculated by directly adding a code for calculating the slope of the temperature curve to software in the electronic equipment system without adding extra cost.
Fig. 8 is a schematic structural diagram illustrating a charging apparatus for a battery according to an exemplary embodiment, and as shown in fig. 8, the apparatus 800 is applied to an electronic device, and includes:
a detection module 801, configured to detect a charging temperature of the electronic device during a battery charging process;
a first determining module 802, configured to determine a temperature change rate of the electronic device according to the charging temperature;
an adjusting module 803, configured to adjust the charging power for charging the battery according to the temperature change rate.
In some embodiments, the adjustment module comprises:
the first determining submodule is used for determining corresponding charging power according to the temperature change rate and the charging temperature;
and the charging module is used for charging the battery with the corresponding charging power.
In some embodiments, the first determining submodule is specifically configured to:
if the charging temperature is within a maximum temperature range for charging the battery and the temperature change rate is less than a predetermined threshold, maintaining the charging power of the current charge.
In some embodiments, the rate of temperature change comprises: rate of temperature rise; the first determining submodule is specifically configured to:
if the charging temperature is within a maximum temperature range for charging the battery and the temperature rise rate is greater than a predetermined threshold, then the charging power is reduced.
In some embodiments, the first determining sub-module is further configured to:
and if the charging temperature is less than the lower temperature limit of the maximum temperature range, increasing the charging power of the battery according to the temperature change rate, or determining the maximum rated charging power of the battery as the actual charging power of the battery.
In some embodiments, the adjustment module comprises:
the first maintenance submodule is used for maintaining the current charging power for a preset time when the temperature change rate is detected to be in a first interval and the lower limit of the first interval is greater than or equal to the upper limit of a second interval;
a first adjusting submodule, configured to decrease the current charging power until the temperature change rate decreases to the second interval after maintaining the current charging power for the predetermined time period; when the temperature change rate is in the second interval, the charging temperature is reduced or maintained unchanged.
In some embodiments, the adjustment module comprises:
the second adjusting submodule is used for adjusting the charging power of the battery according to the temperature change rate when the charging temperature is larger than a temperature threshold value for triggering power adjustment;
a maintaining sub-module for maintaining a current charging power when the charging temperature is less than or equal to the temperature threshold.
In some embodiments, the detection module comprises:
the detection submodule is used for detecting the temperature value of at least one position in the electronic equipment in the process of charging the battery;
and the second determining submodule is used for determining the charging temperature of the electronic equipment according to the different weights of the positions and the temperature value.
With regard to the apparatus in the above-described embodiment, the specific manner in which each module performs the operation has been described in detail in the embodiment related to the method, and will not be elaborated here.
Fig. 9 is a block diagram illustrating an electronic device 900 in accordance with an example embodiment. For example, the electronic device 900 may be a mobile phone, a computer, a digital broadcast terminal, a messaging device, a gaming console, a tablet device, a medical device, a fitness device, a personal digital assistant, and so forth.
Referring to fig. 9, electronic device 900 may include one or more of the following components: processing component 901, memory 902, power component 903, multimedia component 904, audio component 905, input/output (I/O) interface 906, sensor component 907, and communications component 908.
The processing component 901 generally controls overall operation of the electronic device 900, such as operations associated with display, telephone calls, data communications, camera operations, and recording operations. The processing component 901 may include one or more processors 910 to execute instructions to perform all or part of the steps of the methods described above. Further, the processing component 901 may also include one or more modules that facilitate interaction between the processing component 901 and other components. For example, the processing component 901 may include a multimedia module to facilitate interaction between the multimedia component 904 and the processing component 901.
The memory 910 is configured to store various types of data to support operation at the electronic device 900. Examples of such data include instructions for any application or method operating on the electronic device 900, contact data, phonebook data, messages, pictures, videos, and so forth. The memory 902 may be implemented by any type or combination of volatile or non-volatile storage devices, such as Static Random Access Memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic or optical disks.
The power supply component 903 provides power to the various components of the electronic device 900. The power supply component 903 may include: a power management system, one or more power sources, and other components associated with generating, managing, and distributing power for electronic device 900.
The multimedia component 904 comprises a screen that provides an output interface between the electronic device 900 and a user. In some embodiments, the screen may include a Liquid Crystal Display (LCD) and a Touch Panel (TP). If the screen includes a touch panel, the screen may be implemented as a touch screen to receive an input signal from a user. The touch panel includes one or more touch sensors to sense touch, slide, and gestures on the touch panel. The touch sensor may not only sense the boundary of a touch or slide action, but also detect the duration and pressure associated with the touch or slide operation. In some embodiments, the multimedia component 904 includes a front facing camera and/or a rear facing camera. The front camera and/or the rear camera may receive external multimedia data when the electronic device 900 is in an operating mode, such as a shooting mode or a video mode. Each front camera and/or rear camera may be a fixed optical lens system or have a focal length and optical zoom capability.
I/O interface 906 provides an interface between processing component 901 and peripheral interface modules, which may be keyboards, click wheels, buttons, etc. These buttons may include, but are not limited to: a home button, a volume button, a start button, and a lock button.
The communication component 908 is configured to facilitate wired or wireless communication between the electronic device 900 and other devices. The electronic device 900 may access a wireless network based on a communication standard, such as WiFi, 2G, or 3G, or a combination thereof. In an exemplary embodiment, the communication component 908 receives broadcast signals or broadcast related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 908 further includes a Near Field Communication (NFC) module to facilitate short-range communications. For example, the NFC module may be implemented based on Radio Frequency Identification (RFID) technology, infrared data association (IrDA) technology, Ultra Wideband (UWB) technology, Bluetooth (BT) technology, or other technologies.
In an exemplary embodiment, the electronic device 900 may be implemented by one or more Application Specific Integrated Circuits (ASICs), Digital Signal Processors (DSPs), Digital Signal Processing Devices (DSPDs), Programmable Logic Devices (PLDs), Field Programmable Gate Arrays (FPGAs), controllers, micro-controllers, microprocessors or other electronic components for performing the above-described methods.
In an exemplary embodiment, a non-transitory computer readable storage medium comprising instructions, such as the memory 902 comprising instructions, executable by the processor 910 of the electronic device 900 to perform the above-described method is also provided. For example, the non-transitory computer readable storage medium may be a ROM, a Random Access Memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, and the like.
The disclosed embodiments also provide a non-transitory computer readable storage medium, where instructions, when executed by a processor of a mobile terminal, enable the mobile terminal to perform the steps of the method provided in any of the above embodiments.
Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.
It will be understood that the invention is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.
Claims (18)
1. A method for charging a battery, the method being applied to an electronic device, comprising:
detecting the charging temperature of the electronic equipment in the process of charging the battery;
determining the temperature change rate of the electronic equipment according to the charging temperature;
and adjusting the charging power of the battery charging according to the temperature change rate.
2. The method of claim 1, wherein said adjusting a charging power of said battery charging based on said rate of temperature change comprises:
determining corresponding charging power according to the temperature change rate and the charging temperature;
and charging the battery with the corresponding charging power.
3. The method of claim 2, wherein determining the corresponding charging power based on the rate of temperature change and the charging temperature comprises:
if the charging temperature is within a maximum temperature range for charging the battery and the temperature change rate is less than a predetermined threshold, maintaining the charging power of the current charge.
4. The method of claim 2, wherein the rate of temperature change comprises: rate of temperature rise; determining a corresponding charging power according to the temperature change rate and the charging temperature includes:
if the charging temperature is within a maximum temperature range for charging the battery and the temperature rise rate is greater than a predetermined threshold, then the charging power is reduced.
5. The method of claim 4, wherein determining the corresponding charging power based on the rate of temperature change and the charging temperature further comprises:
and if the charging temperature is less than the lower temperature limit of the maximum temperature range, increasing the charging power of the battery according to the temperature change rate, or determining the maximum rated charging power of the battery as the actual charging power of the battery.
6. The method of claim 1, wherein said adjusting a charging power of said battery charging based on said rate of temperature change comprises:
when the temperature change rate is detected to be in a first interval, and the lower limit of the first interval is greater than or equal to the upper limit of a second interval, maintaining the current charging power for a preset time;
after maintaining the current charging power for the predetermined period of time, reducing the current charging power until the temperature change rate is reduced to the second interval; when the temperature change rate is in the second interval, the charging temperature is reduced or maintained unchanged.
7. The method of any of claims 1 to 6, wherein said adjusting the charging power for charging the battery based on the rate of temperature change comprises:
when the charging temperature is larger than a temperature threshold value for triggering power adjustment, adjusting the charging power for charging the battery according to the temperature change rate;
maintaining a current charge power when the charge temperature is less than or equal to the temperature threshold.
8. The method of any one of claims 1 to 6, wherein detecting the charging temperature of the electronic device during charging of the battery comprises:
detecting a temperature value of at least one position in the electronic equipment in the process of charging the battery;
and determining the charging temperature of the electronic equipment according to the different weights of the positions and the temperature value.
9. A charging device for a battery, the device being applied to an electronic apparatus, comprising:
the detection module is used for detecting the charging temperature of the electronic equipment in the process of charging the battery;
the first determining module is used for determining the temperature change rate of the electronic equipment according to the charging temperature;
and the adjusting module is used for adjusting the charging power of the battery charging according to the temperature change rate.
10. The apparatus of claim 9, wherein the adjustment module comprises:
the first determining submodule is used for determining corresponding charging power according to the temperature change rate and the charging temperature;
and the charging module is used for charging the battery with the corresponding charging power.
11. The apparatus of claim 10, wherein the first determining submodule is specifically configured to:
if the charging temperature is within a maximum temperature range for charging the battery and the temperature change rate is less than a predetermined threshold, maintaining the charging power of the current charge.
12. The apparatus of claim 11, wherein the rate of temperature change comprises: rate of temperature rise; the first determining submodule is specifically configured to:
if the charging temperature is within a maximum temperature range for charging the battery and the temperature rise rate is greater than a predetermined threshold, then the charging power is reduced.
13. The apparatus of claim 12, wherein the first determining submodule is further configured to:
and if the charging temperature is less than the lower temperature limit of the maximum temperature range, increasing the charging power of the battery according to the temperature change rate, or determining the maximum rated charging power of the battery as the actual charging power of the battery.
14. The apparatus of claim 9, wherein the adjustment module comprises:
the first maintenance submodule is used for maintaining the current charging power for a preset time when the temperature change rate is detected to be in a first interval and the lower limit of the first interval is greater than or equal to the upper limit of a second interval;
a first adjusting submodule, configured to decrease the current charging power until the temperature change rate decreases to the second interval after maintaining the current charging power for the predetermined time period; when the temperature change rate is in the second interval, the charging temperature is reduced or maintained unchanged.
15. The apparatus of any one of claims 9 to 14, wherein the adjustment module comprises:
the second adjusting submodule is used for adjusting the charging power of the battery according to the temperature change rate when the charging temperature is larger than a temperature threshold value for triggering power adjustment;
a maintaining sub-module for maintaining a current charging power when the charging temperature is less than or equal to the temperature threshold.
16. The apparatus of any one of claims 9 to 14, wherein the detection module comprises:
the detection submodule is used for detecting the temperature value of at least one position in the electronic equipment in the process of charging the battery;
and the second determining submodule is used for determining the charging temperature of the electronic equipment according to the different weights of the positions and the temperature value.
17. A device for charging a battery, characterized in that it comprises at least: a processor and a memory for storing executable instructions operable on the processor, wherein:
the processor is configured to execute the executable instructions, and the executable instructions perform the steps of the method for charging a battery as claimed in any one of the preceding claims 1 to 8.
18. A non-transitory computer-readable storage medium having stored thereon computer-executable instructions that, when executed by a processor, perform steps in a method of charging a battery as set forth in any of claims 1 to 8.
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