CN109149689B - Wireless charging method and device - Google Patents
Wireless charging method and device Download PDFInfo
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- CN109149689B CN109149689B CN201810981906.4A CN201810981906A CN109149689B CN 109149689 B CN109149689 B CN 109149689B CN 201810981906 A CN201810981906 A CN 201810981906A CN 109149689 B CN109149689 B CN 109149689B
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- 238000007600 charging Methods 0.000 title claims abstract description 318
- 238000000034 method Methods 0.000 title claims abstract description 77
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 57
- 229910052744 lithium Inorganic materials 0.000 claims description 57
- 230000008569 process Effects 0.000 claims description 31
- 238000003860 storage Methods 0.000 claims description 13
- 238000012544 monitoring process Methods 0.000 claims description 12
- 238000004364 calculation method Methods 0.000 claims description 6
- 230000009467 reduction Effects 0.000 claims description 4
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- 239000000126 substance Substances 0.000 claims description 2
- 238000005516 engineering process Methods 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 14
- 238000004590 computer program Methods 0.000 description 9
- 238000010277 constant-current charging Methods 0.000 description 9
- 230000008901 benefit Effects 0.000 description 5
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- 238000012545 processing Methods 0.000 description 4
- 238000010280 constant potential charging Methods 0.000 description 3
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- 230000002159 abnormal effect Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010281 constant-current constant-voltage charging Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
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- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B40/00—Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers
Abstract
The embodiment of the invention discloses a wireless charging method and device, relates to the technical field of charging, and can improve the efficiency of wireless charging. The embodiment of the invention adopts the main technical scheme that: acquiring a first voltage value output by a wireless charging receiving end to a charging management chip, wherein the charging management chip receives electric energy transmitted by the wireless charging receiving end and charges a battery; detecting a second voltage value of the battery; judging whether the difference value of the first voltage value and the second voltage value is greater than a preset threshold value or not; if yes, adjusting the first voltage value until the difference between the first voltage value and the second voltage value is smaller than or equal to a preset threshold value, and charging the battery according to the adjusted first voltage value. The embodiment of the invention is mainly used for charging the battery according to the wireless charging technology.
Description
Technical Field
The embodiment of the invention relates to the technical field of charging, in particular to a wireless charging method and device.
Background
With the continuous maturity of battery technology, consumer electronics products generally adopt lithium cell power supply today, based on the self characteristic of lithium cell, mainly experience three charging phase when charging the lithium cell: trickle charge, constant current charge and constant voltage charge, wherein, in the trickle charge and the constant current charge stage, the battery voltage is in a rising state, when the battery voltage is charged to the floating charge voltage of the battery by using a larger constant current, the constant voltage charge stage is entered, the voltage of the battery is kept unchanged, and simultaneously, the charge current is gradually reduced until the charge cutoff current, the charge is stopped and the charge is finished. Because the lithium battery has the advantages of quick charge and discharge, no memory effect, small volume, long cycle service life, high charging efficiency and the like, the lithium battery is widely applied to power supply solutions in various fields and gradually becomes the mainstream.
At present, can utilize wireless charging equipment to charge to lithium cell in the consumer electronics product, according to wireless charging technique promptly, through with in the electronic product wireless receiving terminal that charges with in the wireless charging equipment wireless transmitting terminal contact, receive its electric energy of transmission, to lithium cell charging in the electronic product, this charging process is simple, need not to insert the power cord, can realize filling along with using etc.. However, in the process of charging the lithium battery, due to the fixed voltage output of the wireless charging receiving end, the larger pressure difference between trickle charging and constant current charging of the battery enables the heat productivity of the wireless charging device in the early and middle periods to be larger, and the charging efficiency of the wireless charging device on the lithium battery is greatly reduced.
Disclosure of Invention
In view of the above, the present invention provides a method and an apparatus for wireless charging, and mainly aims to dynamically adjust a constant voltage output from a wireless charging receiving terminal to a charging management chip, so as to reduce a voltage difference between an input voltage of the charging management chip to a battery and a current voltage of the battery, thereby reducing a large amount of heat generated during a charging process of a lithium battery, reducing a heat loss during the charging process, and greatly improving a charging efficiency.
In order to achieve the above purpose, the embodiments of the present invention mainly provide the following technical solutions:
in a first aspect, an embodiment of the present invention provides a wireless charging method, where the method includes:
acquiring a first voltage value output by a wireless charging receiving end to a charging management chip, wherein the charging management chip receives electric energy transmitted by the wireless charging receiving end and charges a battery;
detecting a second voltage value of the battery;
judging whether the difference value of the first voltage value and the second voltage value is greater than a preset threshold value or not;
if yes, adjusting the first voltage value until the difference between the first voltage value and the second voltage value is smaller than or equal to a preset threshold value, and charging the battery according to the adjusted first voltage value.
Optionally, the adjusting the first voltage value to a difference with the second voltage value smaller than or equal to a preset threshold includes:
setting a voltage increment value, the voltage increment value being less than or equal to the preset threshold;
performing addition calculation on the second voltage value and the voltage increment value to obtain a third voltage value;
adjusting the first voltage value to the third voltage value.
Optionally, after the obtaining of the first voltage value output by the wireless charging receiving terminal to the charging management chip, the method further includes:
judging whether the first voltage value is larger than a preset protection voltage value or not;
and if not, sending indication information for resetting the first voltage value to the wireless charging receiving terminal.
Optionally, the method further includes:
monitoring a temperature value of the battery;
judging whether the temperature value is larger than a preset early warning value or not;
if so, controlling the current charging current value of the battery to be reduced to a preset protection current value;
and when the current temperature value of the battery is judged to be reduced to be lower than the preset early warning value, controlling the charging current of the battery to be restored to the corresponding current value before reduction.
In a second aspect, an embodiment of the present invention further provides a wireless charging apparatus, where the apparatus includes:
the wireless charging management device comprises an acquisition unit, a charging management chip and a control unit, wherein the acquisition unit is used for acquiring a first voltage value output by a wireless charging receiving terminal to the charging management chip, and the charging management chip receives electric energy transmitted by the wireless charging receiving terminal and charges a battery;
a detection unit for detecting a second voltage value of the battery;
the judging unit is used for judging whether the difference value between the first voltage value acquired by the acquiring unit and the second voltage value detected by the detecting unit is larger than a preset threshold value or not;
and the adjusting unit is used for adjusting the first voltage value to a value which is less than or equal to a preset threshold value different from the second voltage value when the judging unit judges whether the difference value between the first voltage value and the second voltage value is larger than the preset threshold value, and charging the battery according to the adjusted first voltage value.
Optionally, the adjusting unit includes:
a setting module for setting a voltage increment value, the voltage increment value being less than or equal to the preset threshold;
the calculating module is used for performing addition calculation on the second voltage value and the voltage increment value set by the setting module to obtain a third voltage value;
and the adjusting module is used for adjusting the first voltage value to the third voltage value calculated by the calculating module.
Optionally, the apparatus further comprises:
the judging unit is further used for judging whether the first voltage value is larger than a preset protection voltage value;
and the sending unit is used for sending indication information for resetting the first voltage value to the wireless charging receiving end when the judging unit judges that the first voltage value is not greater than a preset protection voltage value.
Optionally, the apparatus further comprises:
the monitoring unit is used for monitoring the temperature value of the battery;
the judging unit is also used for judging whether the temperature value monitored by the monitoring unit is larger than a preset early warning value or not;
the control unit is used for controlling the current charging current value of the battery to be reduced to a preset protection current value when the judging unit judges that the temperature value is larger than a preset early warning value;
the control unit is further configured to control the charging current of the battery to be restored to a corresponding current value before the reduction when the judging unit judges that the current temperature value of the battery is reduced below the preset early warning value.
By the technical scheme, the technical scheme provided by the embodiment of the invention at least has the following advantages:
the embodiment of the invention provides a wireless charging method and device. In the embodiment of the invention, the wireless charging receiving terminal receives the electric energy transmitted by the wireless charging transmitting terminal and outputs constant voltage to the charging management chip so as to charge the lithium battery by using the charging management chip. Compared with the prior art, the problem that the heat productivity is larger in the early and middle periods of wireless charging due to the fact that the fixed voltage output of the wireless charging receiving end is output and the larger pressure difference is generated in trickle charging and constant current charging of the battery is solved in the charging process of the lithium battery.
The foregoing description is only an overview of the technical solutions of the embodiments of the present invention, and the embodiments of the present invention can be implemented according to the content of the description in order to make the technical means of the embodiments of the present invention more clearly understood, and the detailed description of the embodiments of the present invention is provided below in order to make the foregoing and other objects, features, and advantages of the embodiments of the present invention more clearly understandable.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the embodiments of the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
fig. 1 shows a flowchart of a wireless charging method according to an embodiment of the present invention;
fig. 2 is a flowchart illustrating another wireless charging method according to an embodiment of the present invention;
fig. 3 is a block diagram illustrating a wireless charging device according to an embodiment of the present invention;
fig. 4 is a block diagram illustrating another wireless charging apparatus according to an embodiment of the present invention;
fig. 5 is a schematic diagram illustrating a charging process of a lithium battery according to an embodiment of the present invention;
fig. 6 shows a schematic structural diagram of an electronic device for wireless charging according to an embodiment of the present invention.
Detailed Description
Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the embodiments to those skilled in the art.
The embodiment of the invention provides a wireless charging method, as shown in fig. 1, the method further judges whether the voltage output from a wireless charging receiving terminal to a charging management chip needs to be dynamically adjusted by judging whether the voltage value output from the wireless charging receiving terminal received by the charging management chip and the current voltage value of a battery are greater than a preset threshold value, and then ensures that the difference value between the two is within a preset threshold value range, and the method provides the following specific steps:
101. the method comprises the steps of obtaining a first voltage value output by a wireless charging receiving end to a charging management chip.
The first voltage value refers to a value of voltage output by the wireless charging receiving terminal to the charging management chip. The charging management chip receives the electric energy transmitted by the wireless charging receiving end and charges the battery. The embodiment of the invention receives the electric energy transmitted by the wireless charging transmitting terminal through the wireless charging receiving terminal and outputs constant voltage to the charging management chip so as to charge the battery by using the charging management chip.
In the embodiment of the invention, the battery to be charged can be a lithium battery, so that in the process of charging the lithium battery, the voltage output from the wireless charging receiving terminal to the charging management chip is acquired in real time, so that the power supply voltage value input from the charging management chip to the lithium battery can be known in real time.
102. A second voltage value of the battery is detected.
The second voltage value is a current voltage value of the battery detected in the process of charging the lithium battery.
In the embodiment of the invention, the voltage value of the battery continuously rises in the early stage and the middle stage of charging the lithium battery (namely trickle charging and constant-current charging), and the voltage value of the battery keeps unchanged in the later stage of charging the lithium battery (namely constant-voltage charging).
103. And judging whether the difference value of the first voltage value and the second voltage value is greater than a preset threshold value.
The preset threshold is used for limiting a difference value between a voltage output by the wireless charging receiving terminal to the charging management chip and a current voltage of the battery (between the voltage output by the wireless charging receiving terminal and the current voltage) within a threshold range, so that on the premise that a voltage difference exists between the wireless charging receiving terminal and the charging management chip, that is, on the premise that the charging management chip can normally charge the battery, the voltage difference value between the wireless charging receiving terminal and the charging management chip is reduced as much as possible, and the phenomenon that the voltage difference value between the wireless charging receiving terminal and the charging management chip is too large, so that a large amount of heat is generated by components such as.
For example, the wireless charging receiving end outputs 5 watts of electric power to the charging management chip (where, the voltage is 5 volts, and the current is 1 ampere), detects that the current voltage of the battery is 4 volts, and the current is 1 ampere, so that the current electric power value of the battery is 4 watts by using the formula P ═ UI, P is the electric power, U is the voltage, I is the current, and obtains 80%, that is, the wireless charging efficiency value at this time, by calculating the percentage of the above 4 watts and 5 watts. Therefore, in the embodiment of the present invention, the difference between the voltage output from the wireless charging receiving terminal to the charging management chip and the current voltage of the battery is reduced by using the preset threshold, so as to improve the charging efficiency.
It should be noted that the wireless charging receiving end outputs a constant voltage to the charging management chip, and at the same time, during the early stage (trickle charging) and the middle stage (constant current charging) of the charging, the voltage of the battery is in an increasing state, although the difference between the output voltage of the wireless charging receiving end to the charging management chip and the detected current voltage of the battery is gradually reduced, the initial difference during the reduction process is still very large, and the charging efficiency is reduced by such a very large difference value. Therefore, the embodiment of the invention utilizes the preset threshold value to determine whether the constant voltage output from the wireless charging receiving terminal to the charging management chip needs to be adjusted in time, and timely reduces the difference between the voltage output from the wireless charging receiving terminal to the charging management chip and the current voltage of the battery.
In the embodiment of the invention, whether the difference between the voltage value output by the wireless charging receiving terminal received by the charging management chip and the current voltage value of the battery is greater than a preset threshold value is judged, so as to further judge whether the voltage output by the wireless charging receiving terminal to the charging management chip needs to be adjusted, and ensure that the difference between the output voltage value and the current voltage value of the battery is within a preset threshold value range.
104. If the difference value between the first voltage value and the second voltage value is judged to be larger than the preset threshold value, the first voltage value is adjusted until the difference value between the first voltage value and the second voltage value is smaller than or equal to the preset threshold value, and the battery is charged according to the adjusted first voltage value.
In the embodiment of the present invention, when it is determined that the difference between the first voltage value and the second voltage value is greater than the preset threshold, it is determined that the voltage output from the wireless charging receiving terminal to the charging management chip needs to be adjusted, and the difference between the first voltage value and the second voltage value needs to be adjusted to be less than or equal to the preset threshold, where it needs to be noted that the voltage output from the wireless charging receiving terminal to the charging management chip is adjusted, that is, the voltage input from the charging management chip to the battery is adjusted at the same time, so as to ensure that the difference between the voltage input from the charging management chip to the battery and the current voltage value is within the preset threshold range, so as to avoid that the difference between the voltage input to the battery and the current voltage of the battery is too large in the charging process of the lithium battery, which results in a large amount of heat generated by components such.
In the embodiment of the invention, by judging that the difference value between the first voltage value and the second voltage value is greater than the preset threshold value, real-time comparison and real-time adjustment can be realized, and voltage can be input to the charging management chip in time according to the adjusted voltage value, so that the phenomenon of heat loss is avoided in time.
The embodiment of the invention provides a wireless charging method. In the embodiment of the invention, the wireless charging receiving terminal receives the electric energy transmitted by the wireless charging transmitting terminal and outputs constant voltage to the charging management chip so as to charge the lithium battery by using the charging management chip. Compared with the prior art, the problem that the heat productivity is larger in the early and middle periods of wireless charging due to the fact that the fixed voltage output of the wireless charging receiving end is output and the larger pressure difference is generated in trickle charging and constant current charging of the battery is solved in the charging process of the lithium battery.
In order to describe the above embodiments in more detail, an embodiment of the present invention further provides another wireless charging method, as shown in fig. 2, in which a voltage output by a wireless charging receiving terminal to a charging management chip is determined in advance to determine whether the voltage is too low to complete charging of a lithium battery, and therefore needs to be reset, and meanwhile, a battery temperature is monitored during charging to avoid a heat loss phenomenon due to too high battery temperature, and the following specific steps are provided in the embodiment of the present invention:
201. the method comprises the steps of obtaining a first voltage value output by a wireless charging receiving end to a charging management chip.
The first voltage value refers to a value of voltage output by the wireless charging receiving terminal to the charging management chip. The charging management chip receives the electric energy transmitted by the wireless charging receiving end and charges the battery. The embodiment of the invention receives the electric energy transmitted by the wireless charging transmitting terminal through the wireless charging receiving terminal and outputs constant voltage to the charging management chip so as to charge the battery by using the charging management chip.
In the embodiment of the invention, the battery to be charged can be a lithium battery, so that in the process of charging the lithium battery, the voltage output from the wireless charging receiving terminal to the charging management chip is acquired in real time, so that the power supply voltage value input from the charging management chip to the lithium battery can be known in real time.
Furthermore, after the voltage output from the wireless charging receiving terminal to the charging management chip is obtained, whether the output voltage is greater than a preset protection voltage value is judged, wherein the preset protection voltage value is a protection voltage set to avoid over-discharge in the discharging process of the lithium battery, and accordingly, when the lithium battery is charged, the initial charging voltage value should be greater than the preset protection voltage so that the lithium battery can be normally charged. Therefore, in the embodiment of the present invention, when it is determined that the output voltage from the wireless charging receiving terminal to the charging management chip is less than or equal to the preset protection voltage, the indication information is sent to the wireless charging receiving terminal, and the wireless charging receiving terminal is instructed to reset the output voltage.
202. A second voltage value of the battery is detected.
The second voltage value is a current voltage value of the battery detected in the process of charging the lithium battery.
In the embodiment of the invention, the voltage value of the battery continuously rises in the early stage and the middle stage of charging the lithium battery (namely trickle charging and constant-current charging), and the voltage value of the battery keeps unchanged in the later stage of charging the lithium battery (namely constant-voltage charging).
203. And judging whether the difference value of the first voltage value and the second voltage value is greater than a preset threshold value.
The preset threshold is used for limiting a difference value between a voltage output by the wireless charging receiving terminal to the charging management chip and a current voltage of the battery (between the voltage output by the wireless charging receiving terminal and the current voltage) within a threshold range, so that on the premise that a voltage difference exists between the wireless charging receiving terminal and the charging management chip, that is, on the premise that the charging management chip can normally charge the battery, the voltage difference value between the wireless charging receiving terminal and the charging management chip is reduced as much as possible, and the phenomenon that the voltage difference value between the wireless charging receiving terminal and the charging management chip is too large, so that a large amount of heat is generated by components such as.
In the embodiment of the invention, whether the difference between the voltage value output by the wireless charging receiving terminal received by the charging management chip and the current voltage value of the battery is greater than a preset threshold value is judged, so as to further judge whether the voltage output by the wireless charging receiving terminal to the charging management chip needs to be adjusted, and ensure that the difference between the output voltage value and the current voltage value of the battery is within a preset threshold value range.
204. If the difference value between the first voltage value and the second voltage value is judged to be larger than the preset threshold value, the first voltage value is adjusted until the difference value between the first voltage value and the second voltage value is smaller than or equal to the preset threshold value, and the battery is charged according to the adjusted first voltage value.
In the embodiment of the present invention, when it is determined that the difference between the first voltage value and the second voltage value is greater than the predetermined threshold, the first voltage value is adjusted to a value different from the second voltage value by less than or equal to the predetermined threshold, and the specific adjustment step includes: setting a voltage increment value, wherein the voltage increment value is smaller than or equal to a preset threshold value, performing addition calculation on the second voltage value and the voltage increment value to obtain a third voltage value, and adjusting the first voltage value to the third voltage value.
The difference value between the output voltage of the wireless charging receiving end and the current voltage of the battery can be ensured in the three stages (namely trickle charging, constant-current charging and constant-voltage charging) of the lithium battery by using the voltage increment value, namely, the difference value between the input voltage of the charging management chip and the current voltage of the battery is fixed, and according to performance indexes of different lithium batteries, the minimum pressure difference of the difference value between the input voltage of the charging management chip and the current voltage of the battery can be obtained on the premise that the charging management chip is ensured to normally charge the lithium battery, so that the heat loss generated in the charging process of the lithium battery is ensured to be as small as possible, the electric energy received by the wireless charging receiving end is transmitted to the charging management chip as much as possible and received by the battery, and the charging efficiency of the wireless charging equipment to the lithium battery is improved.
205. The temperature value of the battery is monitored.
In the embodiment of the invention, in the process of charging the lithium battery, whether the charging is abnormal or not can be detected in real time by monitoring the temperature value of the battery, and the heat loss possibly generated by overhigh temperature value can be avoided.
206. And judging whether the temperature value is larger than a preset early warning value or not.
The preset early warning value refers to an upper limit value of the battery temperature in the lithium battery charging process, and specifically, the preset early warning value mainly undergoes three charging stages when the lithium battery is charged: trickle charge, constant current charge, constant voltage charge, so correspondingly, can predetermine a plurality of temperature early warning numerical values according to concrete application scenario, for example, can predetermine temperature early warning numerical value respectively in this three stage to monitor the temperature variation of battery in real time.
In the embodiment of the invention, the current temperature of the battery can be sampled according to the preset time period, and whether the current temperature is greater than the preset early warning value or not is judged.
207. And if the temperature value is judged to be larger than the preset early warning value, controlling the current charging current value of the battery to be reduced to a preset protection current value.
In the embodiment of the present invention, when it is determined that the current temperature value of the sampled battery is greater than the preset warning value, the battery needs to be cooled in time, and the influence of the thermal loss phenomenon on the charging needs to be reduced in time, for example, the current value of the battery can be controlled to be reduced to the preset protection current value.
Further, as shown in fig. 3, in order to describe the above embodiment in more detail, the embodiment of the present invention further provides a schematic diagram of a charging process of a lithium battery, where the diagram mainly goes through three charging stages when charging the lithium battery: trickle charge (low-voltage pre-charge), constant-current charge, constant-voltage charge, wherein, in the trickle charge stage, the battery voltage is lower, it should be guaranteed here that the input voltage value of charge management chip is greater than the preset protection voltage value of battery (this preset protection voltage value is the protection voltage that avoids being set up by excessive discharge in the lithium cell discharge process), otherwise can cause charging anomaly, utilize less constant current to charge the battery voltage to the settlement threshold value this moment, follow-up entering constant-current charge stage, utilize great constant current to charge the voltage of battery to the float charge voltage of battery this moment, enter constant-voltage charge stage afterwards, keep the voltage of battery unchangeable, charging current reduces gradually, reduce to the end current of charging until the electric current, the charge stops, this time ends to the lithium cell charging task.
In the three stages of the charging, the battery voltage is raised in the early stage of the charging (trickle charging) and in the middle stage of the charging (constant-current charging), and the battery voltage is maintained in the latter stage of the charging (constant-voltage charging). As shown in fig. 3, in the three charging stages, although it is detected that the current voltage value of the battery is changed, according to the determination result, whether the difference value between the output voltage from the wireless charging receiving terminal to the charging management chip and the detected current voltage of the battery is within the preset threshold range, then further when the difference value between the two is not within the preset threshold range, the output voltage of the wireless charging receiving terminal is dynamically adjusted in time to ensure that the difference value between the two is timely controlled and maintained within the preset threshold range, or alternatively, a fixed value may be further selected within the preset threshold range to ensure that the difference value between the output voltage from the wireless charging receiving terminal to the charging management chip and the detected current voltage of the battery is maintained to be fixed during the charging process, and further, on the premise that the charging is normally maintained, the selected fixed value is as small as possible, to ensure that the fixed value is the minimum pressure differential.
Through the analysis, when the phase difference value between the output voltage of the wireless charging receiving end to the charging management chip and the detected current voltage of the battery is within the preset threshold range, further a selected fixed value, further a fixed minimum voltage difference, then the phase difference value between the electric power input by the charging management chip and the current electric power of the battery is reduced, even the phase difference value obtained according to the minimum voltage difference is the minimum difference value, so that the charging efficiency is improved as much as possible, and even the charging efficiency is maximized, therefore, the voltage difference value between the voltage input by the charging management chip to the battery and the current voltage of the battery is reduced, heat generated in the charging process of the lithium battery is reduced, heat loss in the charging process is reduced, and the charging efficiency is greatly improved.
Further, as an implementation of the method shown in fig. 1 and fig. 2, an embodiment of the present invention provides a wireless charging device. The embodiment of the apparatus corresponds to the embodiment of the method, and for convenience of reading, details in the embodiment of the apparatus are not repeated one by one, but it should be clear that the apparatus in the embodiment can correspondingly implement all the contents in the embodiment of the method. The device is applied to improving wireless charging efficiency, and specifically as shown in fig. 4, the device includes:
the acquiring unit 31 is configured to acquire a first voltage value output by a wireless charging receiving terminal to a charging management chip, where the charging management chip receives electric energy transmitted by the wireless charging receiving terminal and charges a battery;
a detection unit 32 for detecting a second voltage value of the battery;
a determining unit 33, configured to determine whether a difference between the first voltage value acquired by the acquiring unit 31 and the second voltage value detected by the detecting unit 32 is greater than a preset threshold;
an adjusting unit 34, configured to, when the determining unit 33 determines whether the difference between the first voltage value and the second voltage value is greater than a preset threshold, adjust the first voltage value until the difference between the first voltage value and the second voltage value is smaller than or equal to the preset threshold, and charge the battery according to the adjusted first voltage value.
In the embodiment of the present invention, by determining that the difference between the first voltage value and the second voltage value is greater than the preset threshold, real-time comparison and real-time adjustment can be achieved, and a voltage can be input to the charge management chip in time according to the adjusted voltage value, so as to avoid the phenomenon of heat loss in time, as shown in fig. 5, the adjusting unit 34 includes:
a setting module 341 configured to set a voltage increment value, where the voltage increment value is less than or equal to the preset threshold;
a calculating module 342, configured to perform an addition calculation on the second voltage value and the voltage increment value set by the setting module 341 to obtain a third voltage value;
an adjusting module 343, configured to adjust the first voltage value to the third voltage value calculated by the calculating module 342.
In the embodiment of the invention, after the voltage output from the wireless charging receiving terminal to the charging management chip is obtained, whether the output voltage is greater than a preset protection voltage value is also judged, wherein the preset protection voltage value is a protection voltage set for avoiding over-discharge in the discharging process of the lithium battery, so that correspondingly, when the lithium battery is charged, the initial charging voltage value should be greater than the preset protection voltage, so that the lithium battery can be normally charged. Therefore, in the embodiment of the present invention, when it is determined that the output voltage from the wireless charging receiving terminal to the charging management chip is less than or equal to the preset protection voltage, the apparatus further includes:
the judging unit 33 is further configured to judge whether the first voltage value is greater than a preset protection voltage value;
the sending unit 35 is configured to send, to the wireless charging receiving terminal, indication information for resetting the first voltage value when the determining unit 33 determines that the first voltage value is not greater than a preset protection voltage value.
In the embodiment of the present invention, during charging the lithium battery, the temperature value of the battery may be monitored to detect whether the charging is abnormal in real time, and avoid heat loss possibly generated due to an excessively high temperature value, as shown in fig. 5, the apparatus further includes:
a monitoring unit 36 for monitoring a temperature value of the battery;
the judging unit 33 is further configured to judge whether the temperature value monitored by the monitoring unit 35 is greater than a preset early warning value;
the control unit 37 is configured to control the charging current value of the battery to be reduced to a preset protection current value when the determining unit 33 determines that the temperature value is greater than a preset early warning value;
the control unit 37 is further configured to control the charging current of the battery to return to a corresponding current value before the current value is reduced when the determining unit 33 determines that the current temperature value of the battery is reduced to be lower than the preset early warning value.
Further, an embodiment of the present invention further provides an electronic device for wireless charging, configured to execute the wireless charging method according to any of the foregoing embodiments, as shown in fig. 6, where the electronic device includes a processor and a memory, the acquiring unit, the detecting unit, the determining unit, the adjusting unit, and the like are stored in the memory as program units, and the processor executes the program units stored in the memory to implement corresponding functions. Specifically, the electronic device according to the embodiment of the present invention includes:
at least one processor (processor) 41;
and at least one memory (memory)42, a bus 43 connected to the processor 41; wherein the content of the first and second substances,
the processor 41 and the memory 42 complete mutual communication through the bus 43;
the processor 41 is configured to call program instructions in the memory 42 to perform the methods provided by the above-described method embodiments. The processor 41 includes a kernel, and the kernel calls a corresponding program unit from the memory. The kernel can be set to be one or more, and the wireless charging efficiency is improved by adjusting kernel parameters.
The memory 42 may include volatile memory in a computer readable medium, Random Access Memory (RAM) and/or nonvolatile memory such as Read Only Memory (ROM) or flash memory (flash RAM), and the memory 42 includes at least one memory chip.
Further, an embodiment of the present invention also provides a non-transitory computer-readable storage medium, which stores computer instructions, and the computer instructions cause the computer to execute the above wireless charging method.
Since the wireless charging device described in this embodiment is a device capable of executing the wireless charging method in this embodiment of the present invention, based on the wireless charging method described in this embodiment of the present invention, a person skilled in the art can understand the specific implementation manner of the wireless charging device in this embodiment and various variations thereof, and therefore, how to implement the wireless charging method in this embodiment of the present invention by the wireless charging device is not described in detail herein. As long as those skilled in the art implement the apparatus used in the wireless charging method in the embodiment of the present invention, the apparatus is within the scope of the present application.
In summary, the embodiments of the present invention provide a wireless charging method and apparatus. The embodiment of the invention receives the electric energy transmitted by the wireless charging transmitting terminal through the wireless charging receiving terminal, and outputs constant voltage to the charging management chip so as to charge the lithium battery by using the charging management chip, in the process, whether the voltage value output by the wireless charging receiving terminal and received by the charging management chip is different from the current voltage value of the battery by more than a preset threshold value is judged, so as to further judge whether the voltage output by the wireless charging receiving terminal and output to the charging management chip needs to be adjusted, so as to ensure that the difference between the output voltage value and the current voltage value of the battery is within a preset threshold value range, and further avoid the problem that the wireless charging receiving terminal is connected with an induction coil, the charging management chip and other components and the battery generates great heat in the early and middle stages (trickle charging and constant current charging stages) of charging the lithium battery because the difference between the voltage value input by the charging management chip to the battery and the current voltage value of the battery is too large, the embodiment of the invention can dynamically adjust the constant voltage output by the wireless charging receiving terminal to the charging management chip so as to reduce the voltage difference between the input voltage of the charging management chip to the battery and the current voltage of the battery, thereby reducing the heat generated in the process of charging the lithium battery, reducing the heat loss in the charging process and greatly improving the charging efficiency. Furthermore, the embodiment of the invention also judges the voltage output by the wireless charging receiving terminal to the charging management chip in advance to determine whether the voltage is too low to complete the charging of the lithium battery, so that the resetting is needed, and simultaneously monitors the temperature of the battery in the charging process to avoid the phenomenon of heat loss caused by too high temperature of the battery, so as to further improve the charging efficiency.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
In a typical configuration, a computing device includes one or more processors (CPUs), input/output interfaces, network interfaces, and memory.
The memory may include forms of volatile memory in a computer readable medium, Random Access Memory (RAM) and/or non-volatile memory, such as Read Only Memory (ROM) or flash memory (flash RAM). The memory is an example of a computer-readable medium.
Computer-readable media, including both non-transitory and non-transitory, removable and non-removable media, may implement information storage by any method or technology. The information may be computer readable instructions, data structures, modules of a program, or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), Static Random Access Memory (SRAM), Dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), Read Only Memory (ROM), Electrically Erasable Programmable Read Only Memory (EEPROM), flash memory or other memory technology, compact disc read only memory (CD-ROM), Digital Versatile Discs (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices, or any other non-transmission medium that can be used to store information that can be accessed by a computing device. As defined herein, a computer readable medium does not include a transitory computer readable medium such as a modulated data signal and a carrier wave.
It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in the process, method, article, or apparatus that comprises the element.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The above are merely examples of the present application and are not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.
Claims (8)
1. A wireless charging method, the method comprising:
acquiring a first voltage value output by a wireless charging receiving end to a charging management chip, wherein the charging management chip receives electric energy transmitted by the wireless charging receiving end and charges a battery;
detecting a second voltage value of the battery;
judging whether the difference value between the first voltage value and the second voltage value is larger than a preset threshold value, wherein the preset threshold value is used for limiting the difference value between the voltage output to a charging management chip by the wireless charging receiving terminal and the current voltage of the battery within a specified range so as to achieve normal charging and reduce the difference value;
if yes, adjusting the first voltage value until the difference between the first voltage value and the second voltage value is smaller than or equal to a preset threshold value, and charging the battery according to the adjusted first voltage value, specifically comprising: setting a voltage increment value, wherein the voltage increment value is used for ensuring that the difference value between the output voltage of a wireless charging receiving terminal and the current voltage of a battery is fixed in the three stages of lithium battery charging so as to control the fixed voltage difference value to be the minimum voltage difference by combining performance indexes of different lithium batteries, and the voltage increment value is less than or equal to the preset threshold value; performing addition calculation on the second voltage value and the voltage increment value to obtain a third voltage value; adjusting the first voltage value to the third voltage value.
2. The method of claim 1, wherein after the obtaining the first voltage value output by the wireless charging receiving terminal to the charging management chip, the method further comprises:
judging whether the first voltage value is larger than a preset protection voltage value or not;
and if not, sending indication information for resetting the first voltage value to the wireless charging receiving terminal.
3. The method of claim 1, further comprising:
monitoring a temperature value of the battery;
judging whether the temperature value is larger than a preset early warning value or not;
if so, controlling the current charging current value of the battery to be reduced to a preset protection current value;
and when the current temperature value of the battery is judged to be reduced to be lower than the preset early warning value, controlling the charging current of the battery to be restored to the corresponding current value before reduction.
4. A wireless charging apparatus, the apparatus comprising:
the wireless charging management device comprises an acquisition unit, a charging management chip and a control unit, wherein the acquisition unit is used for acquiring a first voltage value output by a wireless charging receiving terminal to the charging management chip, and the charging management chip receives electric energy transmitted by the wireless charging receiving terminal and charges a battery;
a detection unit for detecting a second voltage value of the battery;
the judging unit is used for judging whether the difference value between the first voltage value acquired by the acquiring unit and the second voltage value detected by the detecting unit is larger than a preset threshold value, wherein the preset threshold value is used for limiting the difference value between the voltage output to a charging management chip by the wireless charging receiving terminal and the current voltage of the battery within a specified range so as to achieve normal charging and reduce the difference value;
the adjusting unit is used for adjusting the first voltage value to a value which is less than or equal to a preset threshold value different from the second voltage value when the judging unit judges whether the difference value between the first voltage value and the second voltage value is larger than the preset threshold value or not, and charging the battery according to the adjusted first voltage value;
the adjusting unit includes:
the setting module is used for setting a voltage increment value, the voltage increment value is smaller than or equal to the preset threshold, and the voltage increment value is used for ensuring that the difference value between the output voltage of the wireless charging receiving end and the current voltage of the battery is fixed in the three-stage process of charging the lithium battery, so that the fixed voltage difference value is controlled to be the minimum voltage difference value by combining performance indexes of different lithium batteries;
the calculating module is used for performing addition calculation on the second voltage value and the voltage increment value set by the setting module to obtain a third voltage value;
and the adjusting module is used for adjusting the first voltage value to the third voltage value calculated by the calculating module.
5. The apparatus of claim 4, further comprising:
the judging unit is further used for judging whether the first voltage value is larger than a preset protection voltage value;
and the sending unit is used for sending indication information for resetting the first voltage value to the wireless charging receiving end when the judging unit judges that the first voltage value is not greater than a preset protection voltage value.
6. The apparatus of claim 4, further comprising:
the monitoring unit is used for monitoring the temperature value of the battery;
the judging unit is also used for judging whether the temperature value monitored by the monitoring unit is larger than a preset early warning value or not;
the control unit is used for controlling the current charging current value of the battery to be reduced to a preset protection current value when the judging unit judges that the temperature value is larger than a preset early warning value;
the control unit is further configured to control the charging current of the battery to be restored to a corresponding current value before the reduction when the judging unit judges that the current temperature value of the battery is reduced below the preset early warning value.
7. An electronic device, comprising:
at least one processor;
and at least one memory, bus connected with the processor; wherein the content of the first and second substances,
the processor and the memory complete mutual communication through the bus;
the processor is configured to invoke program instructions in the memory to perform the wireless charging method of any one of claims 1 to 3.
8. A non-transitory computer-readable storage medium storing computer instructions for causing a computer to perform the wireless charging method of any one of claims 1 to 3.
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|---|---|---|---|---|
| CN109802465A (en) * | 2019-03-12 | 2019-05-24 | 广州道动新能源有限公司 | UPS battery charging online test method, device, storage medium and terminal device |
| CN110556892A (en) * | 2019-08-16 | 2019-12-10 | 歌尔股份有限公司 | Charging box |
| CN112636403B (en) * | 2019-09-24 | 2023-11-21 | 北京小米移动软件有限公司 | Wireless charging control method and device and computer storage medium |
| CN110649688B (en) * | 2019-10-21 | 2023-03-14 | 广西电网有限责任公司电力科学研究院 | Wireless charging control system and method based on battery temperature detection |
| CN111554399B (en) * | 2020-05-25 | 2023-07-25 | 出门问问信息科技有限公司 | Reset method and device, electronic equipment and computer storage medium |
| CN111562505B (en) * | 2020-05-29 | 2023-05-30 | Oppo广东移动通信有限公司 | Battery identification method, electronic equipment and storage medium |
| CN114256988A (en) * | 2020-09-22 | 2022-03-29 | 深南电路股份有限公司 | Wireless charging method and wireless charging system |
| CN116845998A (en) * | 2022-03-24 | 2023-10-03 | 华为技术有限公司 | Charging device, method and related equipment |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105790362A (en) * | 2016-04-12 | 2016-07-20 | 广东欧珀移动通信有限公司 | Battery charging management method and device and user device |
| CN106786820A (en) * | 2015-11-20 | 2017-05-31 | 西安中兴新软件有限责任公司 | A kind of method for charging batteries and device |
| CN107947305A (en) * | 2017-12-01 | 2018-04-20 | 珠海市魅族科技有限公司 | A kind of wireless charging circuit, system, method and terminal device |
| CN108233456A (en) * | 2017-07-31 | 2018-06-29 | 珠海市魅族科技有限公司 | A kind of wireless charging circuit, system, method and electronic equipment |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9789784B2 (en) * | 2015-05-13 | 2017-10-17 | Ford Global Technologies, Llc | Maintaining a vehicle battery |
| CN106970332B (en) * | 2017-05-04 | 2019-09-03 | 成都雅骏新能源汽车科技股份有限公司 | Based on the adaptive charging SOC modification method of feedback |
-
2018
- 2018-08-27 CN CN201810981906.4A patent/CN109149689B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106786820A (en) * | 2015-11-20 | 2017-05-31 | 西安中兴新软件有限责任公司 | A kind of method for charging batteries and device |
| CN105790362A (en) * | 2016-04-12 | 2016-07-20 | 广东欧珀移动通信有限公司 | Battery charging management method and device and user device |
| CN108233456A (en) * | 2017-07-31 | 2018-06-29 | 珠海市魅族科技有限公司 | A kind of wireless charging circuit, system, method and electronic equipment |
| CN107947305A (en) * | 2017-12-01 | 2018-04-20 | 珠海市魅族科技有限公司 | A kind of wireless charging circuit, system, method and terminal device |
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