CN116317026A - Battery charging control method and device and intelligent equipment - Google Patents
Battery charging control method and device and intelligent equipment Download PDFInfo
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- CN116317026A CN116317026A CN202310512690.8A CN202310512690A CN116317026A CN 116317026 A CN116317026 A CN 116317026A CN 202310512690 A CN202310512690 A CN 202310512690A CN 116317026 A CN116317026 A CN 116317026A
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- 238000007600 charging Methods 0.000 title claims abstract description 339
- 238000000034 method Methods 0.000 title claims abstract description 46
- 238000010277 constant-current charging Methods 0.000 claims abstract description 47
- 238000010280 constant potential charging Methods 0.000 claims description 13
- 238000013459 approach Methods 0.000 claims 1
- 230000001276 controlling effect Effects 0.000 description 11
- 238000001514 detection method Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 6
- 230000001105 regulatory effect Effects 0.000 description 6
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- 230000009286 beneficial effect Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 125000004122 cyclic group Chemical group 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
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- 230000002035 prolonged effect Effects 0.000 description 2
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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
- H02J7/007194—Regulation of charging or discharging current or voltage the charge cycle being controlled or terminated in response to non-electric parameters in response to temperature of the battery
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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
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/00309—Overheat or overtemperature protection
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The invention discloses a battery charging control method, a device and intelligent equipment, wherein the battery charging control method comprises the following steps: when the battery is in a constant current charging stage, the charging temperature of the battery is acquired for a plurality of times; after each time of obtaining the charging temperature of the battery, calculating a temperature difference value between the charging temperature obtained at this time and the charging temperature obtained last time; and controlling the charging current of the battery according to the obtained charging temperature, the obtained temperature difference value and the obtained preset charging temperature, so that the charging temperature of the battery tends to the preset charging temperature. The technical scheme of the invention can improve the charging safety and the charging speed of the battery in the intelligent equipment in the constant-current charging stage.
Description
Technical Field
The present invention relates to the field of intelligent device charging technologies, and in particular, to a battery charging control method and apparatus, and an intelligent device.
Background
With the development and progress of charging technology, in recent years, the charging rate of smart devices, particularly smart wearable devices, is increasing. However, during the charging process, the intelligent device generates heat, and as heat is accumulated, if heat treatment is not good, the charging duration of the battery, even fire and explosion, can be affected.
But current smart machine can't carry out effective control to the charging temperature of battery to lead to smart machine battery to charge long length, and charge the security lower.
Disclosure of Invention
The invention mainly aims to provide a battery charging control method, which aims to solve the problems of longer battery charging time and lower charging safety.
In order to achieve the above object, the present invention provides a battery charge control method, including:
when the battery is in a constant current charging stage, the charging temperature of the battery is acquired for a plurality of times;
after the charging temperature of the battery is obtained each time, the charging current of the battery is controlled according to the charging temperature obtained this time, the charging temperature obtained last time and the preset charging temperature, so that the charging temperature of the battery tends to the preset charging temperature.
Optionally, the step of controlling the charging current of the battery according to the charging temperature acquired this time, the charging temperature acquired last time and the preset charging temperature, so that the charging temperature of the battery tends to the preset charging temperature includes:
calculating a temperature difference value between the charging temperature acquired at this time and the charging temperature acquired at last time, and determining whether the charging temperature acquired at this time reaches a preset charging temperature;
if the acquired charging temperature reaches the preset charging temperature, the charging current of the battery is controlled according to the temperature difference value, so that the charging temperature of the battery tends to the preset charging temperature.
Optionally, if it is determined that the current acquired charging temperature reaches the preset charging temperature, controlling the charging current of the battery according to the temperature difference value, so that the charging temperature of the battery tends to the preset charging temperature, including:
if the acquired charging temperature reaches the preset charging temperature, determining whether the temperature difference is a positive value;
if the temperature difference is determined to be a positive value, the charging current of the battery is reduced.
Alternatively, if it is determined that the temperature difference is a positive value, the charging current is reduced to decrease the charge-discharge rate of the battery by 0.2C.
Optionally, if it is determined that the current acquired charging temperature reaches the preset charging temperature, controlling the charging current of the battery according to the temperature difference value, so that the charging temperature of the battery tends to the preset charging temperature, including:
determining whether the temperature difference is negative;
if the temperature difference is determined to be negative, the charging current of the battery is increased.
Alternatively, the increase of the charging current of the battery is stopped when the charging current of the battery increases to the maximum charging current of the battery in the constant current charging stage.
Optionally, the battery charging control method further includes:
when the battery enters a constant-voltage charging stage from a constant-current charging stage, the charging current of the battery is reduced, and the battery is subjected to constant-voltage charging.
Optionally, the battery charging control method further includes:
acquiring the temperature of a circuit board of the circuit board where the power management integrated circuit is located;
controlling the charging current of the battery according to the temperature of the circuit board and the charging temperature of the battery
The invention also provides a battery charging control device, which comprises:
a memory;
a processor; the method comprises the steps of,
a battery charge control program stored on the memory and executable on the processor, wherein: the battery charge control program, when executed by the processor, implements the battery charge control method as described above.
The invention also provides intelligent equipment, which comprises a battery and the battery charging control device.
According to the battery charging control method, the charging temperature of the battery is regulated according to the temperature difference value in the constant-current charging stage, so that the charging temperature of the battery is dynamically regulated, and once the charging temperature rises or falls, the charging temperature can be quickly restored to the preset charging temperature by regulating the charging current, so that potential safety hazards caused by overhigh charging temperature of the battery are avoided. Compared with the battery charging over-temperature protection mechanism adopted by the existing intelligent equipment, the temperature adjusting time is early, the charging current is only reduced in the adjusting process, and the battery charging can not be stopped, so that the influence on the whole charging time of the battery is small, and the problem that the charging time of the battery in the intelligent equipment is long is solved. The preset charging temperature maintained by the technical scheme of the invention is the initial temperature of the battery entering the constant-current charging stage and is far lower than the preset high-temperature set by the conventional battery charging over-temperature protector, so that even if the battery fails, the temperature margin of the battery in the subsequent charging stage is sufficient, the probability of safety accidents caused by high temperature of the battery continuously charging is low, and the problem of low charging safety of the battery in the constant-current charging stage in the intelligent equipment is solved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flowchart illustrating a battery charge control method according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of another embodiment of a battery charge control method according to the present invention;
FIG. 3 is a schematic diagram illustrating a battery charging control method according to another embodiment of the present invention;
FIG. 4 is a schematic diagram illustrating a battery charging control method according to another embodiment of the present invention;
FIG. 5 is a schematic diagram illustrating temperature difference versus charge current adjustment according to an embodiment of a battery charge control method of the present invention;
FIG. 6 is a schematic diagram of a battery charging control device according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of an embodiment of the present smart device.
Reference numerals illustrate:
the achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Furthermore, descriptions such as those referred to as "first," "second," and the like, are provided for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implying an order of magnitude of the indicated technical features in the present disclosure. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.
The invention provides a battery charging control method.
Referring to fig. 1, the battery charge control method includes:
and step S100, when the battery is in the constant current charging stage, the charging temperature of the battery is acquired for a plurality of times.
The battery charging method provided by the invention can be applied to intelligent equipment, such as, but not limited to, intelligent wearable equipment such as intelligent wrist bands or intelligent headphones, intelligent mobile phones, health monitoring equipment, intelligent household equipment and the like. Taking the intelligent wearable device as an example, the execution subject of the battery charging method may be a battery charging control device in the intelligent wearable device. The intelligent wearable device can be provided with a charging interface and a power management integrated circuit, and the battery charging control device can enable the charging current of the battery output by the power management integrated circuit to be constant by controlling the charging voltage of the battery output by the power management integrated circuit after the battery enters a constant current charging stage, so that constant current charging of the battery is realized.
In actual charging, besides the constant-current charging phase, the battery in the intelligent wearable device may further have more charging phases, for example, a fast charging phase, a constant-voltage charging phase and a trickle charging phase, and the sequence of the charging phases and the constant-current charging phase may be determined according to actual needs, which is not limited herein. In different charging phases, the battery control device can control the output current and/or the output voltage of the power management integrated circuit to the battery according to corresponding control strategies, and can realize switching of each charging phase by determining whether the battery voltage of the battery during charging reaches a battery voltage threshold required by another charging phase. In the charging stage, since the constant current charging stage has the characteristics of larger charging current and longer stage duration, the charging temperature of the battery tends to rise faster in the constant current charging stage, and the battery charging over-temperature protection mechanism adopted by the existing intelligent wearable device controls the power management integrated circuit to stop charging the battery when the charging temperature of the battery is determined to reach a higher preset high temperature, and controls the power management integrated circuit to continue charging the battery when the temperature of the battery falls back to reach a lower preset low temperature, so as to realize the charging over-temperature protection of the battery. However, when the over-temperature protection mechanism is triggered, the charging time of the battery can be prolonged greatly, and the battery with high temperature is easy to cause safety accidents due to the fact that the preset high temperature is higher once the over-temperature protection mechanism fails.
The intelligent wearable device can be provided with a battery temperature detection circuit corresponding to the battery, and the battery temperature detection circuit can detect the real-time temperature of the battery and output a battery temperature detection signal to the battery charging control device. The battery charging control device can acquire a battery temperature detection signal every interval for a preset time period when the battery is in a constant current charging stage, and can acquire the current battery charging temperature by analyzing and processing the battery temperature detection signal of the digital signal after converting the battery temperature detection signal of the analog signal acquired every time into the digital signal, so as to realize multiple acquisition of the battery charging temperature.
Step 200, after each time of obtaining the charging temperature of the battery, controlling the charging current of the battery according to the charging temperature obtained this time, the charging temperature obtained last time and the preset charging temperature, so that the charging temperature of the battery tends to the preset charging temperature.
The battery charging control device can correspondingly calculate the charging temperature acquired at this time and the charging temperature acquired at last time after acquiring the charging temperature of the battery each time so as to obtain a corresponding calculation result of the charging temperature acquired at this time and the charging temperature acquired at last time. It should be noted that, after the charging temperature of the battery is obtained for the first time in the constant current charging stage, no calculation is performed; or, the charging temperature obtained for the first time and a preset temperature value can be correspondingly calculated to obtain a calculation result; or, a preset value can be directly called as the calculation result, wherein the preset value can be selected according to the actual requirement, and details are not repeated here.
The battery charging control device can determine the change condition of the battery charging temperature according to the calculation result. It can be understood that the change condition of the charging temperature of the battery can be divided into three conditions of rising charging temperature, falling charging temperature and unchanged charging temperature, so that the battery charging control device can control the charging current of the battery according to the change condition of the charging temperature of the battery, thereby avoiding the over-high charging temperature of the battery. The method comprises the following steps: when the change condition of the charging temperature of the battery is that the charging temperature is increased, correspondingly reducing the charging current of the battery so as to reduce the charging temperature of the battery; when the change condition of the charging temperature of the battery is that the charging temperature is reduced, correspondingly increasing the charging current of the battery so as to increase the charging temperature of the battery; when the charging temperature of the battery is unchanged, the charging current of the battery is maintained unchanged, so that the charging temperature of the battery is unchanged. Thus, the charging temperature of the battery in the constant-current charging stage can be maintained to be above and below the preset charging temperature by cyclic reciprocation; it is understood that the preset charging temperature may be an initial temperature of the battery entering the constant current charging stage or a preset charging temperature value.
According to the battery charging control method, the charging temperature of the battery is regulated according to the temperature difference value in the constant-current charging stage, so that the charging temperature of the battery is dynamically regulated, and once the charging temperature rises or falls, the charging temperature can be quickly restored to the preset charging temperature by regulating the charging current, so that potential safety hazards caused by overhigh charging temperature of the battery are avoided. Compared with a battery charging over-temperature protection mechanism adopted by the existing intelligent wearable equipment, the temperature adjusting time is early, the charging current is only reduced in the adjusting process, and the battery charging can not be stopped, so that the influence on the whole charging time length of the battery is small, and the problem that the charging time length of the battery in the intelligent wearable equipment is long is solved. The preset charging temperature maintained by the technical scheme of the invention is the initial temperature of the battery entering the constant-current charging stage and is far lower than the preset high-temperature set by the conventional battery charging over-temperature protector, so that even if the battery fails, the temperature margin of the battery in the subsequent charging stage is sufficient, the probability of safety accidents caused by high temperature due to continuous charging of the battery is low, and the problem of low charging safety of the battery in the constant-current charging stage in the intelligent wearable equipment is solved.
Referring to fig. 2, step S200 of controlling the charging current of the battery according to the current acquired charging temperature, the last acquired charging temperature and the preset charging temperature so that the charging temperature of the battery tends to the preset charging temperature includes:
step S210, calculating a temperature difference between the charging temperature acquired at this time and the charging temperature acquired at last time, and determining whether the charging temperature acquired at this time reaches a preset charging temperature.
The temperature difference value can be divided into three cases of positive value, negative value and zero value, wherein the positive value is used for representing that the charging temperature of the battery is increased, the negative value is used for representing that the charging temperature of the battery is decreased, and the zero value is used for representing that the charging temperature of the battery is unchanged, so that the battery charging control device can control the charging current of the battery according to the temperature difference value, and the charging temperature of the battery is prevented from being too high. The method comprises the following steps: when the temperature difference is positive, correspondingly reducing the charging current of the battery so as to reduce the charging temperature of the battery; when the temperature difference is a negative value, correspondingly increasing the charging current of the battery so as to increase the charging temperature of the battery; when the temperature difference is zero, the charging current of the battery is maintained unchanged, so that the charging temperature of the battery is unchanged. Thus, the charging temperature of the battery in the constant-current charging stage can be maintained to be above and below the preset charging temperature by cyclic reciprocation; it is understood that the preset charging temperature may be an initial temperature of the battery entering the constant current charging stage or a preset charging temperature value.
Step S220, if the acquired charging temperature reaches the preset charging temperature, the charging current of the battery is controlled according to the temperature difference value, so that the charging temperature of the battery tends to the preset charging temperature.
Since the initial temperature of the battery entering the constant-current charging stage, namely the preset charging temperature is in direct proportion to the environmental temperature of the environment where the intelligent wearable device is located, the method specifically comprises the following steps: a higher ambient temperature will result in a higher initial temperature for the constant current charging phase and a lower ambient temperature will result in a lower initial temperature for the battery to enter the constant current charging phase. For the initial temperature with lower temperature, even if the temperature difference is a positive value, the charging temperature of the battery is still lower, and the probability of safety accidents caused by high temperature of the battery is also lower, so that the charging time of the whole battery can be prolonged by reducing the charging current.
In order to solve the problem, the technical scheme of the invention comprises the steps of firstly determining whether the acquired battery charging temperature reaches the preset charging temperature, controlling the charging current according to the temperature difference value under the condition that the acquired battery charging temperature reaches the preset charging temperature, and maintaining the current charging current of the battery under the condition that the acquired battery charging temperature does not reach the preset charging temperature. The preset charging temperature may be set to be an initial temperature of the battery entering the constant current charging stage in the normal temperature environment, that is, an initial temperature of the battery entering the constant current charging stage in the low temperature environment, and an initial temperature of the battery entering the constant current charging stage in the high temperature environment. Of course, the preset charging temperature may also be set to other temperature values according to actual needs, which will not be described herein.
Therefore, the preset charging temperature is not influenced by the environmental temperature of the intelligent wearable device, the charging speed is reduced by excessively adjusting the charging current in a low-temperature environment, and the charging temperature of the battery can be reduced in time in a high-temperature environment, so that the probability of safety accidents of the battery in a constant-current charging stage is reduced, and the charging speed and the charging safety of the intelligent wearable device in the constant-current charging stage are further improved.
Optionally, referring to fig. 3, if it is determined that the current acquired charging temperature reaches the preset charging temperature, a step S220 of controlling the charging current of the battery according to the temperature difference value so that the charging temperature of the battery tends to the preset charging temperature includes:
step S221, determining whether the temperature difference is a positive value;
step S222, if the temperature difference is determined to be a positive value, the charging current of the battery is reduced.
The charging control device can determine whether the temperature difference is larger than 0 value or not by judging whether the temperature difference is larger than 0 value or not, and can determine that the temperature difference is a positive value when the judgment result is larger than 0 value, and control the power management integrated circuit to reduce the charging current output to the battery. And when the judgment result is not more than 0 value, the charging control device can determine that the temperature difference value is not a positive value. Therefore, compared with other conditions of preferentially determining the temperature difference, the battery charging control device can reduce the charging temperature of the battery at the first time of the rise of the battery temperature, thereby being beneficial to improving the timeliness of battery cooling.
Alternatively, if it is determined that the temperature difference is a positive value, the charging current is reduced to decrease the charge-discharge rate of the battery by 0.2C.
According to the technical scheme, the descending amplitude of the battery charge-discharge multiplying power after the charging current is reduced is set to be 0.2C, so that the technical scheme of the invention can be suitable for batteries with different rated capacities in intelligent wearing equipment, and the charging speed of the battery in a constant-current charging stage can be ensured on the premise of effectively reducing the charging temperature of the battery.
Referring specifically to fig. 5, T1-T5 are the battery temperatures obtained five times, respectively, the battery enters a constant current charging stage in T2-T3, and the preset temperature threshold may be not less than 10 ℃, not more than 40 ℃, for example, may be 40 ℃. Because the temperature of the battery in the T1-T2 does not reach the preset temperature threshold, even if the temperature difference between the battery temperature obtained in the T2 and the battery temperature in the T1 is +10 ℃, the charging current is still increased, so that the charging and discharging multiplying power of the battery is increased from 0.2C to 1C; the temperature difference between the battery temperature obtained at the time of T4 and the battery temperature at the time of T3 is-5 ℃, so that the charging current is reduced, and the charging and discharging multiplying power of the battery is reduced from 1C to 0.8C; the temperature difference between the battery temperature obtained at T5 and the battery temperature at T4 is +5℃, and thus the charging current is increased so that the charge/discharge rate of the battery is increased from 0.8C. It should be noted that, C is characterized as the charge-discharge rate of the battery, and represents a measure of the discharge rate, which is equal to the ratio of the charge-discharge current to the rated capacity; for example: when a battery having a rated capacity of 100 A.h is charged with 20A, the discharge rate is 0.2C.
Optionally, referring to fig. 4, if it is determined that the current acquired charging temperature reaches the preset charging temperature, a step S220 of controlling the charging current of the battery according to the temperature difference value so that the charging temperature of the battery tends to the preset charging temperature includes:
step S223, determining whether the temperature difference is a negative value;
in step S224, if the temperature difference is determined to be negative, the charging current of the battery is increased.
The charging control device may continuously determine whether the temperature difference is less than 0 value by determining that the temperature difference is not greater than 0 value, and may determine that the temperature difference is negative when the determination result is less than 0 value, and control the power management integrated circuit to increase the charging current output to the battery. When the judgment result is not more than 0 value, the charging control device can determine that the temperature difference value is 0 value, and can control the power management integrated circuit to maintain the charging current output to the battery unchanged. In this embodiment, step S223 may occur after step S222, so that the battery charging control device may raise the charging temperature of the battery at the second time when the battery temperature is lowered, so as to avoid the too low charging temperature from affecting the charging speed of the battery, thereby being beneficial to improving the timeliness of the battery temperature raising. Of course, in other embodiments, the step S223 may also occur synchronously with the step S222 or occur before the step S222, which is not described herein.
Alternatively, the increase of the charging current of the battery is stopped when the charging current of the battery increases to the maximum charging current of the battery in the constant current charging stage.
The constant current charging phase of the battery may have a maximum charging current. The battery charging control device may obtain the real-time charging current of the battery, and may determine whether the real-time charging current of the battery reaches the maximum charging current of the battery in the constant current charging stage when executing step S224, and may stop continuously increasing the charging current when determining that the real-time charging current of the battery reaches the maximum charging current of the battery in the constant current charging stage, i.e. continuously charging the battery. It is understood that when it is determined that the maximum charging current of the battery in the constant current charging stage is not reached, the battery charging control device may continue to perform step S224 to increase the charging current of the battery. Therefore, the increased charging current can be prevented from exceeding the maximum charging current of the battery in the constant-current charging stage, and the charging safety of the intelligent wearable device in the constant-current charging stage is further improved.
Referring to fig. 1 to 4, the battery charge control method further includes:
when the battery enters a constant-voltage charging stage from a constant-current charging stage, the charging current of the battery is reduced, and the battery is subjected to constant-voltage charging.
In this embodiment, the next charging stage of the constant current charging stage may be a constant voltage charging stage, and the charging current of the constant voltage charging stage may be smaller than the charging current of the constant current charging stage. When the battery voltage reaches the battery voltage threshold corresponding to the constant voltage charging stage, the battery charging control device controls the power management integrated circuit to adjust the charging voltage output to the battery to the charging voltage corresponding to the constant voltage charging stage, and reduces the charging voltage output to the battery to the charging voltage corresponding to the constant voltage charging stage, and maintains the charging voltage until the next charging stage is entered, so as to perform constant voltage charging on the battery.
Referring to fig. 1 to 4, the battery charge control method further includes:
acquiring the temperature of a circuit board of the circuit board where the power management integrated circuit is located;
controlling the charging current of the battery according to the temperature of the circuit board and the charging temperature of the battery
In practical application, the circuit board where the power management integrated circuit is located is usually a main control board (for simplifying the description, the main board is hereinafter referred to as a main board) of the intelligent wearable device, and other various functional circuits required by the operation of the intelligent wearable device such as a main controller are usually integrated on the main board. In order to solve the problem, the control method of the invention also controls the charging current, that is, the step S220 is executed, and meanwhile, the circuit board temperature of the circuit board where the power management integrated circuit is located is obtained, so that the battery charging current is increased or decreased, and meanwhile, whether the circuit board temperature reaches the preset circuit board temperature is also determined, and when the preset circuit board temperature is determined not to be reached, the power management integrated circuit is controlled to continuously control the charging current output to the battery; upon determining that the preset circuit board temperature is reached, the power management integrated circuit is controlled to maintain or reduce the charging current output to the battery. The preset circuit board temperature can be obtained through multiple pre-tests, and details are not described here. Therefore, other functional circuits on the circuit board where the power management integrated circuit is located can be prevented from being damaged due to high temperature of the main board during charging, and the charging safety of the intelligent wearable device is improved.
The invention also provides a battery charging control device.
Referring to fig. 6, in an embodiment, the battery charge control device includes:
a memory 11;
a processor 12; the method comprises the steps of,
a battery charge control program stored on the memory 11 and executable on the processor 12, wherein: the battery charge control program, when executed by the processor 12, implements the battery charge control method as described above.
The specific steps of the battery charging control method refer to the above embodiments, and since the battery charging control device adopts all the technical solutions of all the embodiments, at least all the beneficial effects brought by the technical solutions of the embodiments are provided, and will not be described in detail herein. The memory 11 may be a high-speed RAM memory or a stable memory (non-volatile memory), such as a disk memory, and the memory 11 may alternatively be a storage device independent of the control device; the processor 12 may be a CPU. The memory 11 and the processor 12 are connected by a communication bus 13, which communication bus 13 may be a UART bus or an I2C bus. It can be understood that the battery control device can also be directly realized by adopting a main control unit in the intelligent equipment.
The present invention also proposes an intelligent device, referring to fig. 7, the intelligent device includes a battery 20 and a battery charging control device 10, and the specific structure of the battery charging control device 10 refers to the above embodiment.
In this embodiment, the smart device may further include a power management integrated circuit 30, where the power management integrated circuit 30 may be connected to the battery 20 and the battery charging control device 10, respectively, and the power management integrated circuit 30 is configured to charge the battery 20 under the control of the battery charging control device 10.
The foregoing description is only of the optional embodiments of the present invention, and is not intended to limit the scope of the invention, and all the equivalent structural changes made by the description of the present invention and the accompanying drawings or the direct/indirect application in other related technical fields are included in the scope of the invention.
Claims (10)
1. A battery charge control method, characterized by comprising:
when the battery is in a constant current charging stage, the charging temperature of the battery is acquired for a plurality of times;
after the charging temperature of the battery is obtained each time, the charging current of the battery is controlled according to the charging temperature obtained this time, the charging temperature obtained last time and the preset charging temperature, so that the charging temperature of the battery tends to the preset charging temperature.
2. The battery charge control method according to claim 1, wherein the step of controlling the charge current of the battery so that the charge temperature of the battery approaches the preset charge temperature based on the charge temperature acquired this time, the charge temperature acquired last time, and the preset charge temperature, comprises:
calculating a temperature difference value between the charging temperature acquired at this time and the charging temperature acquired at last time, and determining whether the charging temperature acquired at this time reaches a preset charging temperature;
if the acquired charging temperature reaches the preset charging temperature, the charging current of the battery is controlled according to the temperature difference value, so that the charging temperature of the battery tends to the preset charging temperature.
3. The battery charge control method according to claim 2, wherein the step of controlling the charge current of the battery according to the temperature difference value so that the charge temperature of the battery tends to the preset charge temperature if it is determined that the charge temperature acquired this time reaches the preset charge temperature, comprises:
if the acquired charging temperature reaches the preset charging temperature, determining whether the temperature difference is a positive value;
if the temperature difference is determined to be a positive value, the charging current of the battery is reduced.
4. The battery charge control method according to claim 3, wherein if the temperature difference is determined to be a positive value, the charge current is reduced to decrease the charge-discharge rate of the battery by 0.2C.
5. The battery charge control method according to claim 2, wherein if it is determined that the current acquired charge temperature reaches the preset charge temperature, the step of controlling the charge current of the battery according to the temperature difference value so that the charge temperature of the battery tends to the preset charge temperature, further comprises:
determining whether the temperature difference is negative;
if the temperature difference is determined to be negative, the charging current of the battery is increased.
6. The battery charge control method according to claim 5, wherein the increase in the charging current of the battery is stopped when the charging current of the battery increases to the maximum charging current of the battery in the constant current charging stage.
7. The battery charge control method according to claim 1, characterized in that the battery charge control method further comprises:
when the battery enters a constant-voltage charging stage from a constant-current charging stage, the charging current of the battery is reduced, and the battery is subjected to constant-voltage charging.
8. The battery charge control method according to any one of claims 1 to 7, characterized in that the battery charge control method further comprises:
acquiring the temperature of a circuit board of the circuit board where the power management integrated circuit is located;
and controlling the charging current of the battery according to the temperature of the circuit board and the charging temperature of the battery.
9. A battery charge control device, characterized by comprising:
a memory;
a processor; the method comprises the steps of,
a battery charge control program stored on the memory and executable on the processor, wherein: the battery charge control program, when executed by the processor, implements the battery charge control method according to any one of claims 1 to 8.
10. A smart device comprising a battery and the battery charge control device of claim 9.
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| CN202310512690.8A CN116317026A (en) | 2023-05-09 | 2023-05-09 | Battery charging control method and device and intelligent equipment |
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Application publication date: 20230623 |