CN111092468A - Charging management module, method, device and storage medium - Google Patents
Charging management module, method, device and storage medium Download PDFInfo
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Abstract
The application relates to a charging management module, a method, a device and a storage medium. The main control module of the charging management module configures a charging mode of the charging module in an initial charging stage according to initial electric quantity of the lithium battery detected by the charging module, and further configures the charging module to enter a rapid charging stage according to real-time electric quantity of the lithium battery in a charging process. The charging mode of the initial charging stage at least comprises a trickle charging mode and a first constant current charging mode; the charging mode of the quick charging stage at least comprises a second constant current charging mode; and the constant current of the first constant current charging mode is smaller than that of the second constant current charging mode. Based on this, can guarantee that the lithium cell passes through recovery charging or the mode of precharging in initial charging stage, gets into normal charged state, improves the security in initial charging stage, reduces the loss to the lithium cell, prolongs the life-span of lithium cell.
Description
Technical Field
The present disclosure relates to the field of battery technologies, and in particular, to a charging management module, a method, an apparatus, and a storage medium.
Background
Lithium batteries are excellent and reliable members of secondary batteries, and are used in portable electronic devices (mobile phones, handheld fans, electronic watches, etc.), tablet computers, digital cameras, wireless speakers, and the like. With the use of batteries, the properties of the batteries change during repeated charging and discharging, and the cruising ability of the batteries also decreases continuously.
With the mass production of lithium batteries, problems such as battery explosion, short battery life, low charging speed and the like also occur in the application process of the lithium batteries, the charging technology used in many current electronic products, such as fans, watches, digital cameras and the like, is quite crude, and has great potential safety hazards, and even smart phones and tablet computers have reports that explosion and leakage of the lithium batteries occur in the charging process. In the implementation process, the inventor finds that the traditional charging scheme has at least the following problems: the potential safety hazard is many, influences the life-span of lithium cell.
Disclosure of Invention
Therefore, it is necessary to provide a charging management module, a method, a device and a storage medium for solving the problems that the conventional charging scheme has many potential safety hazards and affects the service life of a lithium battery.
In order to achieve the above object, in one aspect, an embodiment of the present application provides a charging management module, including:
the charging module is used for being connected between a charging source and the lithium battery;
and the main control module is connected with the charging module.
The charging module is used for detecting initial electric quantity when the lithium battery is connected and real-time electric quantity of the lithium battery in the charging process, and sending the initial electric quantity and the real-time electric quantity to the main control module.
The main control module is used for:
when the initial electric quantity is smaller than a full discharge threshold value, the charging module is configured to be in a trickle charging mode, and when the real-time electric quantity is larger than the full discharge threshold value, the charging module is configured to be in a first constant-current charging mode until the real-time electric quantity is larger than a first electric quantity threshold value;
when the initial electric quantity is greater than a full discharge threshold and less than a first electric quantity threshold, configuring the charging module into a first constant current charging mode, and when the real-time electric quantity is greater than the first electric quantity threshold, configuring the charging module into a second constant current charging mode; the constant current of the first constant current charging mode is smaller than that of the second constant current charging mode;
when the initial electric quantity is larger than a first electric quantity threshold value, configuring the charging module into a first constant current charging mode and charging the lithium battery for preset time; and when the charging for the preset time is finished, configuring the charging module into a second constant-current charging mode or a constant-voltage charging mode.
On the other hand, the embodiment of the application also provides a charging management method, which is applied to the charging management module.
The charging management method comprises the following steps:
the method comprises the steps that a main control module obtains initial electric quantity and real-time electric quantity of a lithium battery; the initial electric quantity is detected by the charging module when the lithium battery is accessed; the real-time electric quantity is obtained by detecting the charging module in the charging process of the lithium battery.
The main control module configures the charging module into a trickle charging mode when the initial electric quantity is smaller than a full discharging threshold value, and configures the charging module into a first constant current charging mode when the real-time electric quantity is larger than the full discharging threshold value until the real-time electric quantity is larger than the first electric quantity threshold value.
The main control module configures the charging module into a first constant current charging mode when the initial electric quantity is greater than a full discharging threshold and smaller than a first electric quantity threshold, and configures the charging module into a second constant current charging mode when the real-time electric quantity is greater than the first electric quantity threshold; the constant current of the first constant current charging mode is smaller than that of the second constant current charging mode.
When the initial electric quantity is larger than a first electric quantity threshold value, the main control module configures the charging module into a first constant current charging mode and charges the lithium battery for preset time; and when the charging for the preset time is finished, configuring the charging module into a second constant-current charging mode or a constant-voltage charging mode.
In one embodiment, a charging management device is provided, which is applied to the charging management module. The charging management device is arranged in the main control module.
The charging management device includes:
the electric quantity obtaining unit is used for obtaining the initial electric quantity and the real-time electric quantity of the lithium battery; the initial electric quantity is detected by the charging module when the lithium battery is accessed; the real-time electric quantity is obtained by detecting the charging module in the charging process of the lithium battery.
The first initial charging unit is used for configuring the charging module into a trickle charging mode when the initial electric quantity is smaller than a full discharging threshold value, and configuring the charging module into a first constant current charging mode when the real-time electric quantity is larger than the full discharging threshold value until the real-time electric quantity is larger than the first electric quantity threshold value.
The second initial charging unit is used for configuring the charging module into a first constant current charging mode when the initial electric quantity is greater than the full discharging threshold and smaller than the first electric quantity threshold, and configuring the charging module into a second constant current charging mode when the real-time electric quantity is greater than the first electric quantity threshold; the constant current of the first constant current charging mode is smaller than that of the second constant current charging mode.
The third initial charging unit is used for configuring the charging module into a first constant current charging mode and charging the lithium battery for preset time when the initial electric quantity is greater than the first electric quantity threshold value; and when the charging for the preset time is finished, configuring the charging module into a second constant-current charging mode or a constant-voltage charging mode.
In one embodiment, a computer storage medium is provided, on which a computer program is stored, which when executed by a processor implements the charging management method as described above.
One of the above technical solutions has the following advantages and beneficial effects:
in the charging management module, the main control module configures a charging mode of the charging module in an initial charging stage according to initial electric quantity of the lithium battery detected by the charging module, and further configures the charging module to enter a rapid charging stage according to real-time electric quantity of the lithium battery in a charging process. The charging mode of the initial charging stage at least comprises a trickle charging mode and a first constant current charging mode; the charging mode of the quick charging stage at least comprises a second constant current charging mode; and the constant current of the first constant current charging mode is smaller than that of the second constant current charging mode. Based on this, can guarantee that the lithium cell passes through recovery charging or the mode of precharging in initial charging stage, gets into normal charged state, improves the security in initial charging stage, reduces the loss to the lithium cell, prolongs the life-span of lithium cell.
Drawings
Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings in which:
FIG. 1 is a first schematic block diagram of a charge management module in accordance with one embodiment;
FIG. 2 is a second schematic block diagram of a charge management module in accordance with one embodiment;
FIG. 3 is a third schematic block diagram of a charge management module in accordance with one embodiment;
FIG. 4 is a schematic diagram illustrating a charging process of the charging management module according to an embodiment;
FIG. 5 is a schematic diagram illustrating a temperature warning process of the charging management module according to an embodiment;
FIG. 6 is a first schematic flow chart diagram illustrating a method for charge management in one embodiment;
FIG. 7 is a second schematic flow chart diagram illustrating a method for charge management in one embodiment;
fig. 8 is a schematic structural diagram of a charging management device according to an embodiment.
Detailed Description
To facilitate an understanding of the present application, the present application will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present application are shown in the drawings. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element and be integral therewith, or intervening elements may also be present.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
In the traditional lithium battery charging process, the voltage and the current are unchanged in the whole charging process, so that huge pressure is brought to the battery; in particular the initial charging phase, there is no corresponding pre-charging mode for different initial charge amounts. Therefore, the embodiment of the application provides a charging management module, which can ensure the safety and high efficiency of a lithium battery in the charging process.
In one embodiment, as shown in fig. 1, the charging management module includes:
the charging module is used for being connected between a charging source and the lithium battery;
and the main control module is connected with the charging module.
The charging module is used for detecting initial electric quantity when the lithium battery is connected and real-time electric quantity of the lithium battery in the charging process, and sending the initial electric quantity and the real-time electric quantity to the main control module.
The main control module is used for:
when the initial electric quantity is smaller than a full discharge threshold value, the charging module is configured to be in a trickle charging mode, and when the real-time electric quantity is larger than the full discharge threshold value, the charging module is configured to be in a first constant-current charging mode until the real-time electric quantity is larger than a first electric quantity threshold value;
when the initial electric quantity is greater than a full discharge threshold and less than a first electric quantity threshold, configuring the charging module into a first constant current charging mode, and when the real-time electric quantity is greater than the first electric quantity threshold, configuring the charging module into a second constant current charging mode; the constant current of the first constant current charging mode is smaller than that of the second constant current charging mode;
when the initial electric quantity is larger than a first electric quantity threshold value, configuring the charging module into a first constant current charging mode and charging the lithium battery for preset time; and when the charging for the preset time is finished, configuring the charging module into a second constant-current charging mode or a constant-voltage charging mode.
Specifically, in the charging management module, the control end of the charging module is connected with the main control module, the input end of the charging module is used for connecting a charging source, and the output end of the charging module is used for connecting a lithium battery to be charged. The charging module can be used for detecting whether the lithium battery or the charging source is connected or not, detecting the initial electric quantity, the real-time electric quantity, the charging current, the charging voltage and the like of the lithium battery, and also can be used for controlling the electric connection or disconnection of the charging source and the lithium battery. Wherein the initial electric quantity is the electric quantity detected before the lithium battery is charged; the real-time electric quantity is the electric quantity of the lithium battery in the charging process. The main control module can acquire the initial electric quantity and the real-time electric quantity of the lithium battery through the charging module, and configures the charging mode of the charging module according to the acquired electric quantity.
Specifically, when the charging module detects that the initial electric quantity of the lithium battery is smaller than the full discharge threshold value, it indicates that the lithium battery is currently close to full discharge, and at this time, the main control module configures the charging module as a trickle charging mode, so that the charging module charges the lithium battery in the trickle charging mode. The trickle charge mode has very low current and can be used for restoring charging of the fully discharged lithium battery unit until the real-time electric quantity is larger than the full discharge threshold. Further, in the charging process in the trickle charge mode, if the real-time electric quantity of the lithium battery is greater than the full discharge threshold, the main control module configures the charging module into a first constant-current charging mode, so that the charging module pre-charges the lithium battery by adopting a smaller constant current, and the quick charging stage is not started until the real-time electric quantity is greater than the first electric quantity threshold. When the real-time electric quantity is larger than the first electric quantity threshold value, the main control module configures the charging module into a second constant current charging mode so as to rapidly charge the lithium battery; the constant current of the first constant current charging mode is smaller than that of the second constant current charging mode. Based on this, in the embodiment of the application, when the lithium battery is in a state of nearly complete discharge, the charging transition of the lithium battery can be performed through trickle charging and constant-current charging, the trickle charging is firstly performed to recover the lithium battery, and then the small constant-current charging is performed to transition the lithium battery to a rapid charging stage. It should be noted that, in the conventional technology, the trickle charge mode is applied to the late charging stage of the lithium battery, that is, the electric quantity is close to a full state, but in the case that the lithium battery is close to complete discharge, the trickle charge mode is adopted to recover the lithium battery, so that the loss of the lithium battery can be reduced, the safety of the initial charging stage is improved, and the service life of the lithium battery is prolonged.
When the charging module detects that the initial electric quantity is larger than the full-discharge threshold and smaller than the first electric quantity threshold, the trickle charging mode does not need to be adopted for the lithium battery for transition; the main control module can configure the charging module into a first constant current charging mode so that the charging module charges the lithium battery with a smaller constant current, and the quick charging stage is not started until the electric quantity of the lithium battery is larger than a first electric quantity threshold value. When the real-time electric quantity is larger than the first electric quantity threshold value, the main control module configures the charging module into a second constant current charging mode so as to rapidly charge the lithium battery. In addition, when the charging module detects that the initial electric quantity is greater than the first electric quantity threshold value, the main control module can configure the charging module into a first constant current charging mode, and charges the lithium battery for a preset time at a lower constant current; when the charging within the preset time is finished, the main control module can configure the charging module to be in a second constant-current charging mode to enter a rapid charging stage or configure the charging module to be in a constant-voltage charging mode to enter a constant-voltage charging stage according to the real-time electric quantity. Based on this, before entering the quick charge stage or the constant voltage charge stage, this application embodiment all can pass through first constant current charging mode and pass through, just enter the quick charge stage or the constant voltage charge stage after precharging the lithium cell with less constant current, can reduce the loss to the lithium cell, the life-span of extension lithium cell.
It should be noted that, in the embodiment of the present application, the charging management module is used for charging the lithium battery, and specifically, the charging management module may be an independent charging device, and is used for charging various portable electronic devices, and may also be embedded into an embedded system as a charging system. Wherein, the charging source can be a socket power supply or other power supplies such as a lithium battery and the like.
The charging module can mainly comprise a power management chip and an interface circuit. The power management chip can be used for providing constant charging current and/or stable charging voltage; optionally, the power management chip at least includes five charging modes according to different current modes and sizes: a trickle charge mode, a first constant current charge mode (i.e., a pre-charge mode), a second constant current charge mode (i.e., a fast charge mode), a constant voltage charge mode, and a charge termination mode. The main control module mainly comprises a processor and an interface circuit and is used for acquiring the electrical parameters of the lithium battery, realizing the operation of a charging algorithm and monitoring the charging condition, and different charging modes can be configured by controlling a power management chip of the charging module. The embodiment of the application can ensure that the lithium battery enters a normal charging state through a restorable charging or pre-charging mode in an initial charging stage, improve the safety of the initial charging stage, reduce the charging loss of the lithium battery and prolong the service life of the lithium battery. In addition, the embodiment of the application adopts a multi-stage charging scheme, so that the charging efficiency and the charging speed of the lithium battery are greatly improved.
In one embodiment, the full discharge threshold value ranges from 5% to 12% of the total charge of the lithium battery. Illustratively, the full discharge threshold may be 6%, 7%, 8%, 9%, 10%, or 11% of the total charge of the lithium battery, etc.; specifically, the setting may be made according to the actual specification of the lithium battery.
In one embodiment, the first threshold value of the amount of electricity may range from 18% to 23% of the total amount of electricity of the lithium battery. Illustratively, the first charge threshold may be 19%, 20%, 21%, 22%, etc. of the total charge of the lithium battery; specifically, the setting may be made according to the actual specification of the lithium battery.
In one embodiment, the predetermined time may range from 2 minutes to 5 minutes. Illustratively, the preset time may be 3 minutes or 4 minutes, etc.; specifically, the setting may be made according to the actual specification of the lithium battery.
In one embodiment, the constant current of the second constant current charging mode is a maximum charging current set by the main control module. Optionally, the maximum charging current may range from 800mA (milliampere) to 1200 mA; illustratively, the maximum charging current may be 900mA, 1000mA, 1100mA, or the like; specifically, the setting may be made according to the actual specification of the lithium battery. Further, the constant current of the first constant current charging mode is less than the maximum charging current; optionally, the value range of the constant current of the first constant current charging mode may be 400mA to 700 mA; for example, the constant current of the first constant current charging mode may be 500mA or 600mA, etc.; specifically, the setting may be made according to the actual specification of the lithium battery.
In one example, in the initial charging stage, if it is detected that the initial charge of the lithium battery is less than 7%, it indicates that the lithium battery is nearly completely discharged, and it is required that the main control module configures the charging module to enter the trickle charging mode. In the trickle charge mode, the current is very small, and the fully discharged lithium battery is firstly subjected to recovery charging until the real-time electric quantity is larger than 7%. Then the main control module configures the charging module to enter a pre-charging mode, and performs constant current charging with a small constant current until the battery capacity reaches 20%. If the initial electric quantity of the lithium battery exceeds 20% at the beginning, the lithium battery works in a pre-charging mode for 3 minutes to ensure that the battery enters a normal charging state, the voltage of the lithium battery slowly rises at the moment, and the configurable charging module enters a quick charging stage.
In one embodiment, the main control module configures the charging module to be in a charging termination mode when the charging module meets a termination condition; the termination condition comprises that the charging module is in a constant voltage charging mode and the charging current is smaller than the termination current, and/or the charging module charges the lithium battery in the constant voltage charging mode for the charging termination time.
And the charging module disconnects the electric connection between the lithium battery and the charging source in the charging termination mode and enters a dormant state.
When the main control module monitors that the voltage of the lithium battery is lower than the full-electricity voltage, the charging module controls the lithium battery to be electrically connected with the charging source, and the lithium battery is charged again.
Specifically, in the later stage of constant-voltage charging, the charging current is very small and is basically equivalent to trickle charging; however, unlike nickel batteries, lithium batteries cannot be trickle charged continuously, which can lead to battery instability; the traditional technology can not ensure that the battery is not damaged under the condition of long-time charging. Therefore, the main control module configures the charging module to enter a charging termination mode at this stage, and the charging is not continued. In one example, when the charging module is in a constant voltage charging mode and the charging current is less than the termination current, the main control module configures the charging module to a charging termination mode to disconnect the electrical connection between the lithium battery and the charging source and to put the charging module into a sleep state. In another example, when the charging module charges the lithium battery in the constant voltage charging mode and the charging duration reaches the charging termination time, the main control module configures the charging module in the charging termination mode to disconnect the electrical connection between the lithium battery and the charging source and to enable the charging module to enter the sleep state.
Furthermore, when the main control module configures the charging module to be in a charging termination mode, the voltage of the lithium battery is monitored in real time; and if the voltage is less than the full-electricity voltage, controlling the lithium battery to be electrically connected with the charging source again through the charging module, and recharging the lithium battery. Based on this, this application embodiment can end the constant voltage charging and enter the charge termination stage when the electric quantity of lithium cell is close to full charge, in time breaks off the electric connection of lithium cell and charging source, avoids long-time trickle to the harm of lithium cell, prolongs the life-span of lithium cell.
It should be noted that the value range of the termination current can be 120mA to 180 mA; illustratively, the termination current may be 130mA, 140mA, 150mA, 160mA, 170mA, or the like; specifically, the setting may be made according to the actual specification of the lithium battery. The full-electricity voltage is less than the maximum charging voltage, and the difference value of the full-electricity voltage and the maximum charging voltage can be 80mV (millivolt) to 120 mV; illustratively, the difference may be 90mV, 100mV, 110mV, or the like; specifically, the setting may be made according to the actual specification of the lithium battery.
In one example, in the constant voltage charging stage, the voltage of the lithium battery is kept at the highest value after the constant current charging is completed; in order to ensure full charge and to optimize the battery performance, the main control module configures the charging module to enter a constant voltage charging mode, in which the charging current is decreased in a tapered manner from the maximum charging current, and when the charging current is less than a termination current (150mA), or after the charging is continued for one hour from the beginning of the current stage, the constant voltage charging is ended, and the charging termination stage is entered.
In the later stage of constant voltage charging, the charging current is very small and is basically equivalent to trickle charging, at the moment, the main control module configures the charging module to enter a charging termination mode, the charging is not continued, but simultaneously the battery voltage is monitored in real time, and when the voltage of the lithium battery is smaller than the set maximum battery voltage minus 100mV, a charging cycle is restarted from the initial stage of charging.
In one embodiment, the master control module is further configured to:
and when the real-time electric quantity is greater than the first electric quantity threshold value and the charging voltage is less than the maximum charging voltage, configuring the charging module to be in a second constant current charging mode.
And when the charging voltage reaches the maximum charging voltage, configuring the charging module into a constant-voltage charging mode.
Specifically, in the charging process, if the real-time electric quantity rises and exceeds a first electric quantity threshold value and the charging voltage is lower than the maximum charging voltage at the moment, the main control module configures the charging module to be in a second constant current charging mode so as to enter a rapid charging stage; that is, after the transition of the pre-charge is completed, the rapid charge is performed to improve the charging efficiency and speed. Further, if the charging voltage reaches the maximum charging voltage, the main control module configures the charging module to be in a constant voltage charging mode to ensure full charge of the electric quantity and to optimize the battery performance. It should be noted that the maximum charging voltage can range from 7.2V (volts) to 7.6V; illustratively, the maximum charging voltage may be 7.3V, 7.4V, 7.5V, or the like; specifically, the setting may be made according to the actual specification of the lithium battery.
In one example, in the fast charging phase, the main control module configures the charging module to enter a second constant current charging mode, where the current is rapidly increased to a set maximum charging current, and the current is maintained in a stable state for constant current charging. The constant current charging can be continued for a certain period of time, and the voltage of the lithium battery rises linearly in the process until the set maximum charging voltage is reached; at the moment, the electric quantity of the battery generally reaches more than 80%, the constant-current charging is finished, and the constant-voltage charging stage is started. Based on the embodiment of the application, the charging efficiency of the lithium battery can reach more than 92.5%.
In one embodiment, when the main control module monitors that the temperature of the charging module exceeds a temperature window, the charging module is configured to be in a charging termination mode; and if the temperature of the charging module is reduced to the temperature window within the first time in the charging termination mode, configuring the charging module to enter a recharging mode.
The charging module performs pre-charging on the lithium battery for a second time in a first constant current charging mode in a re-charging mode, and performs re-charging on the lithium battery for a third time in a second constant current charging mode when the pre-charging is completed; if the temperature exceeds the temperature window in the recharging process, the main control module configures the charging module to be in a charging termination mode, finishes charging and gives an alarm.
Specifically, the main control module monitors the temperature of the charging module in real time in the charging process, and if the temperature of the charging module exceeds a set temperature window, the charging module is configured to be in a charging termination mode, so that the lithium battery and a charging source are electrically disconnected, the temperature reduction is promoted, and potential safety hazards caused by overhigh charging temperature are prevented. Further, if the charging module is cooled to a temperature window within a first time, the main control module may configure the charging module to enter a recharging mode, instruct the charging module to pre-charge in a first constant current charging mode, and transition to recharging in a second constant current mode. In the process of recharging, if the temperature still rises to exceed the temperature window, the main control module configures the charging module into a charging termination mode, ends the charging process and gives an alarm; if the temperature does not exceed the temperature window, the corresponding charging mode can be configured according to parameters such as real-time electric quantity, charging voltage and the like.
The temperature window may be 0 ℃ to 45 ℃, 5 ℃ to 50 ℃, etc., and is not particularly limited herein. The temperature reduction time, the pre-charging time and the recharging time, namely the first time, the second time and the third time, can be within the range of 3 minutes to 8 minutes, such as 4 minutes, 5 minutes or 6 minutes; specifically, the setting may be made according to the actual specification of the lithium battery. The embodiment of the application has the lithium battery charging protection function, can avoid potential safety hazards caused by overhigh temperature, and prolongs the service life of the lithium battery.
In one example, the charging full-process main control module monitors the temperature of the power management chip in real time, and if the temperature of the chip exceeds a temperature window (0 ℃ -45 ℃), the charging termination mode is immediately entered, and the charging operation is disconnected. And if the temperature is recovered after five minutes, the battery is charged again in a pre-charging mode, and the battery is charged again in a quick charging mode after five minutes, so that the battery enters a quick charging stage. If the temperature value still exceeds the specified window after the five minutes of pre-charging or the temperature exceeds the temperature window again after the charging is restarted, the charging termination stage is entered, the charging is not attempted, a small buzzer is used for giving a warning for more than 10 seconds, and the power is automatically cut off within 10 minutes.
In one embodiment, the main control module is further configured to configure the charging module to enter a sleep state when detecting that the charging module is not connected to the lithium battery and/or the charging source.
Specifically, the main control module detects whether a lithium battery is accessed and whether a charging source is accessed in real time, and charging operation can be performed only under the condition that the lithium battery and the charging source are accessed simultaneously. When a charging source and/or a lithium battery is not connected, the module enters a sleep mode, and the current drawn from the power supply is extremely small; for example, the current may be less than one microampere. The embodiment of the application can timely enter the dormant state under the condition of lacking the charging source or the lithium battery, and consumption of the module is reduced.
In one embodiment, when detecting that the electric quantity of the charging source is lower than the power supply threshold value, the main control module controls the charging module to disconnect the electric connection with the charging source within a fourth time, and performs alarm prompt.
Specifically, the main control module detects the electric quantity condition of the charging source in real time, and if the charging source is an independent charger, the power supply source is a socket, so that the condition of low electric quantity generally cannot occur; in the case of an embedded charging system, the power supply may be a lithium battery, in which case the battery level needs to be detected in real time. The charging device is configured in a real-time detection mode because the type of the charging source cannot be judged, and simultaneously has an overdischarge protection function, once the battery serving as the charging source is too low in electric quantity (for example, lower than 3.7V), a low-electric-quantity alarm and a buzzer alarm for less than three seconds can be generated, the power is automatically cut off within 10 minutes, and the battery of the charging source is prevented from being overdischarged. Based on this, this application embodiment possesses lithium cell charge protect function, the low electric quantity of charging source reminds function, overdischarge protect function etc. has avoided the potential safety hazard that the circumstances such as charging temperature is too high, long-time charging brought.
In one embodiment, as shown in fig. 2, the charging module includes:
the power interface is used for connecting a charging source;
the charging interface is used for connecting a lithium battery;
and the power management chip is respectively connected with the main control module, the power interface and the charging interface.
Specifically, the charging module comprises a power management chip, a power interface and a charging interface; the power management chip can be used for acquiring parameters of a charging source through the power interface, acquiring parameters of the lithium battery through the charging interface, sending the acquired parameters to the main control module, and meanwhile, the power management chip can also receive instructions of the main control module, enter a corresponding charging mode or termination mode and the like.
In one embodiment, as shown in fig. 2, the main control module includes:
the SPI interface is connected with the power management chip;
an external interface for connecting an external computer device;
an indicating unit;
and the single chip microcomputer is respectively connected with the SPI interface, the external interface and the indicating unit.
Specifically, in the main control module, the single chip microcomputer is a high-speed, full-duplex and synchronous communication bus by an abbreviation of an SPI (Serial Peripheral Interface), and parameters, instructions and the like are transmitted between a tube of the chip and a power management chip, so that the main control module can be used for charge monitoring and charge mode configuration. The single chip microcomputer is also in data transmission with external computer equipment through an external interface, and can be used for receiving the configuration of the computer equipment and modifying charging parameters, such as maximum charging current, maximum charging voltage and the like. In addition, singlechip connection indicating unit can be used to the suggestion of reporting to the police when the abnormal conditions appears. The indication unit may include, but is not limited to, an indicator light, a buzzer, a display screen, and the like.
In one example, as shown in fig. 3, the charging module includes a power management chip, a power interface, a charging interface, and the like. The power interface and the charging interface are adapted to a Universal Serial Bus (USB), a Micro USB and the like, so as to be suitable for different types of devices. The power management chip is used for providing constant current and stable voltage, and can be divided into five charging modes according to different magnitudes of the provided current: a trickle charge mode, a pre-charge mode, a fast charge mode, a constant voltage charge mode, and a charge termination mode. The main control module controls the chip through the SPI bus and selects different charging modes.
The main control module mainly completes the functions of controlling the charging module, calculating the charging algorithm and monitoring the charging condition. The main control module includes a plurality of monitoring units such as an MCU (micro controller Unit), an SPI interface, a UART (Universal Asynchronous Receiver/Transmitter), a serial port, an LED (Light Emitting Diode) indicator, and a small buzzer. The SPI is used for communicating with a power management chip, configuring a charging mode, reading the current temperature value of the chip and the like; the UART serial port can be used for communicating with a computer and is used for configuring the maximum battery voltage, the maximum charging current and the like; the LED indicator light can be used for displaying the current charging state, for example, the light is on to indicate that charging is in progress, the light is off to indicate that charging is completed, and frequent flashing indicates that the current lithium battery is insufficient in electric quantity; the buzzer can be used for an abnormal alarm. Exemplarily, the module defaults to 7.4V lithium batteries for charging, at this time, the maximum charging voltage can default to 7.4V, the maximum charging current can default to 1000mA, and if a user needs to charge other types of lithium batteries, parameter configuration needs to be performed through a UART serial port.
In one example, the charging workflow of the charging management module can be divided into four stages as shown in fig. 4: the charging method comprises a charging initial stage, a quick charging stage, a constant voltage charging stage and a charging termination stage.
In the initial stage of charging, there are three branches: if the battery electric quantity is detected to be less than 7%, entering a trickle charge mode; if the battery capacity is detected to be more than 7% but less than 20%, entering a pre-charging mode; if the battery charge exceeds 20% at the beginning, the system will operate in the pre-charge mode for 3 minutes, and then enter the fast charge phase.
The quick charging stage is the main stage of the charging process, and the voltage charged to the lithium battery reaches the maximum charging voltage value in the constant current charging mode.
The constant voltage charging stage is an important stage of the charging process and is a key for ensuring the service life of the battery and preventing overcharge, and the charging current is reduced in a conical manner in the stage. The charging phase has two branches: if the charging current is less than the termination current, entering a charging termination stage; and if the charging time exceeds one hour, entering a charging termination phase.
And in the charging termination stage, the connection between the charging source and the lithium battery is disconnected, and meanwhile, the module enters a sleep mode to ensure the minimum power consumption until the voltage value of the lithium battery is less than the full-electricity voltage, the module is awakened again, and a new charging cycle is started from the initial charging stage.
In an example, the charging temperature early warning workflow of the charging management module can be as shown in fig. 5, if the temperature exceeds the temperature window, the charging termination mode is entered, if the temperature recovers after five minutes, the charging is performed again in the pre-charging mode, and after five minutes, the charging is performed again in the fast charging mode, and the fast charging stage is entered; if the temperature value still exceeds the temperature window after five minutes or the temperature exceeds the specified window again after the charging is restarted, the charging termination stage is entered, the charging is not attempted any more, and a warning is given.
The warning condition of the charging management module comprises two types: and a low-power alarm and an overhigh charging temperature alarm of the charging source are given. Illustratively, when the charging source is low-battery and alarms, the indicator lamp quickly flickers and is warned by a buzzer for less than three seconds, and the power is automatically cut off within 10 minutes; when the charging temperature is too high, the alarm does not have the indication lamp to flash, but has the buzzer alarm for more than 10 seconds, and the power is automatically cut off within 10 minutes.
The charging management module enters a sleep mode under the condition of no charging service, and the current consumption in the sleep mode is less than one microampere. When the charging source is connected again, or when the charging source exists and the voltage of the lithium battery is lower than the full-electricity voltage, the module can be awakened.
In one embodiment, a charging management method is applied to the charging management module.
As shown in fig. 6, the charge management method includes the steps of:
step S110, the main control module obtains initial electric quantity and real-time electric quantity of the lithium battery; the initial electric quantity is detected by the charging module when the lithium battery is accessed; the real-time electric quantity is obtained by detecting the charging module in the charging process of the lithium battery.
Step S120, the main control module configures the charging module to be in a trickle charging mode when the initial electric quantity is less than the full discharging threshold, and configures the charging module to be in a first constant current charging mode when the real-time electric quantity is greater than the full discharging threshold until the real-time electric quantity is greater than the first electric quantity threshold.
Step S130, the main control module configures the charging module into a first constant current charging mode when the initial electric quantity is greater than a full discharging threshold value and less than a first electric quantity threshold value, and configures the charging module into a second constant current charging mode when the real-time electric quantity is greater than the first electric quantity threshold value; the constant current of the first constant current charging mode is smaller than that of the second constant current charging mode.
Step S140, when the initial electric quantity is greater than a first electric quantity threshold value, the main control module configures the charging module into a first constant current charging mode and charges the lithium battery for a preset time; and when the charging for the preset time is finished, configuring the charging module into a second constant-current charging mode or a constant-voltage charging mode.
In one embodiment, as shown in fig. 7, the charging management method further includes the steps of:
step S150, when the charging module meets the termination condition, the main control module configures the charging module to be in a charging termination mode, so that the charging module disconnects the electric connection between the lithium battery and the charging source in the charging termination mode and enters a dormant state; the terminal condition includes that the charging module is in a constant voltage charging mode and the charging current is smaller than the terminal current, and/or the charging module charges the lithium battery in the constant voltage charging mode for the charging terminal time.
And step S160, when the main control module monitors that the voltage of the lithium battery is lower than the full-electricity voltage, the main control module controls the lithium battery to be electrically connected with a charging source through the charging module, and recharges the lithium battery.
In one embodiment, as shown in fig. 7, the charging management method further includes the steps of:
step S170, when monitoring that the temperature of the charging module exceeds a temperature window, the main control module configures the charging module to be in a charging termination mode; if the temperature of the charging module is reduced to the temperature window within the first time in the charging termination mode, configuring the charging module to enter a recharging mode; the recharging mode is that the charging module performs the pre-charging on the lithium battery for the second time in the first constant current charging mode, and performs the recharging on the lithium battery for the third time in the second constant current charging mode when the pre-charging is completed.
And step S180, when the temperature exceeds the temperature window in the recharging process of the main control module, configuring the charging module to be in a charging termination mode, ending charging and giving an alarm prompt.
For the specific limitation of the charging management method, reference may be made to the above limitation of the charging management module, which is not described herein again. It should be understood that although the steps in the flowcharts of fig. 7 and 8 are shown in order as indicated by the arrows, the steps are not necessarily performed in order as indicated by the arrows. The steps are not performed in the exact order shown and described, and may be performed in other orders, unless explicitly stated otherwise. Moreover, at least some of the steps in fig. 7 and 8 may include multiple sub-steps or multiple stages, which are not necessarily performed at the same time, but may be performed at different times, and the order of performing the sub-steps or stages is not necessarily sequential, but may be performed alternately or alternately with other steps or at least some of the sub-steps or stages of other steps.
In one embodiment, a charging management device is provided, which is applied to the charging management module. The charging management device is arranged in the main control module.
As shown in fig. 8, the charge management device includes:
the electric quantity obtaining unit is used for obtaining the initial electric quantity and the real-time electric quantity of the lithium battery; the initial electric quantity is detected by the charging module when the lithium battery is accessed; the real-time electric quantity is obtained by detecting the charging module in the charging process of the lithium battery.
The first initial charging unit is used for configuring the charging module into a trickle charging mode when the initial electric quantity is smaller than a full discharging threshold value, and configuring the charging module into a first constant current charging mode when the real-time electric quantity is larger than the full discharging threshold value until the real-time electric quantity is larger than the first electric quantity threshold value.
The second initial charging unit is used for configuring the charging module into a first constant current charging mode when the initial electric quantity is greater than the full discharging threshold and smaller than the first electric quantity threshold, and configuring the charging module into a second constant current charging mode when the real-time electric quantity is greater than the first electric quantity threshold; the constant current of the first constant current charging mode is smaller than that of the second constant current charging mode.
The third initial charging unit is used for configuring the charging module into a first constant current charging mode and charging the lithium battery for preset time when the initial electric quantity is greater than the first electric quantity threshold value; and when the charging for the preset time is finished, configuring the charging module into a second constant-current charging mode or a constant-voltage charging mode.
For specific limitations of the charging management device, reference may be made to the above limitations of the charging management module, which are not described herein again. It should be noted that, in the embodiment of the present application, the division of the module is schematic, and is only one logic function division, and there may be another division manner in actual implementation. The modules in the charging management device can be wholly or partially implemented by software, hardware and a combination thereof. The modules can be embedded in a hardware form or independent from a processor in the computer device, and can also be stored in a memory in the computer device in a software form, so that the processor can call and execute operations corresponding to the modules.
In one embodiment, a computer-readable storage medium is provided, having a computer program stored thereon, which when executed by a processor, performs the steps of:
acquiring initial electric quantity and real-time electric quantity of a lithium battery; the initial electric quantity is detected by the charging module when the lithium battery is accessed; the real-time electric quantity is obtained by detecting the charging module in the charging process of the lithium battery.
When the initial electric quantity is smaller than the full discharge threshold value, the charging module is configured to be in a trickle charging mode, and when the real-time electric quantity is larger than the full discharge threshold value, the charging module is configured to be in a first constant-current charging mode until the real-time electric quantity is larger than the first electric quantity threshold value.
When the initial electric quantity is greater than a full discharge threshold and less than a first electric quantity threshold, configuring the charging module into a first constant current charging mode, and when the real-time electric quantity is greater than the first electric quantity threshold, configuring the charging module into a second constant current charging mode; the constant current of the first constant current charging mode is smaller than that of the second constant current charging mode.
When the initial electric quantity is larger than a first electric quantity threshold value, configuring the charging module into a first constant current charging mode and charging the lithium battery for preset time; and when the charging for the preset time is finished, configuring the charging module into a second constant-current charging mode or a constant-voltage charging mode.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by hardware instructions of a computer program, which can be stored in a non-volatile computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. Any reference to memory, storage, database, or other medium used in the embodiments provided herein may include non-volatile and/or volatile memory, among others. Non-volatile memory can include read-only memory (ROM), Programmable ROM (PROM), Electrically Programmable ROM (EPROM), Electrically Erasable Programmable ROM (EEPROM), or flash memory. Volatile memory can include Random Access Memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms such as Static RAM (SRAM), Dynamic RAM (DRAM), Synchronous DRAM (SDRAM), Double Data Rate SDRAM (DDRSDRAM), Enhanced SDRAM (ESDRAM), Synchronous Link DRAM (SLDRAM), Rambus Direct RAM (RDRAM), direct bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present application. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present application shall be subject to the appended claims.
Claims (12)
1. A charging management module, comprising:
the charging module is used for being connected between a charging source and the lithium battery;
the main control module is connected with the charging module;
the charging module is used for detecting initial electric quantity when the lithium battery is accessed and real-time electric quantity of the lithium battery in a charging process, and sending the initial electric quantity and the real-time electric quantity to the main control module;
the main control module is used for:
when the initial electric quantity is smaller than a full discharge threshold value, configuring the charging module into a trickle charging mode, and when the real-time electric quantity is larger than the full discharge threshold value, configuring the charging module into a first constant-current charging mode until the real-time electric quantity is larger than a first electric quantity threshold value;
when the initial electric quantity is greater than the full discharge threshold and less than the first electric quantity threshold, configuring the charging module to be in a first constant current charging mode, and when the real-time electric quantity is greater than the first electric quantity threshold, configuring the charging module to be in a second constant current charging mode; wherein the constant current of the first constant current charging mode is less than the constant current of the second constant current charging mode;
when the initial electric quantity is larger than the first electric quantity threshold value, configuring the charging module into the first constant current charging mode and charging the lithium battery for preset time; and when the charging within the preset time is finished, configuring the charging module into the second constant-current charging mode or the constant-voltage charging mode.
2. The charging management module of claim 1,
when the charging module meets a termination condition, the main control module configures the charging module to be in a charging termination mode; the termination condition comprises that the charging module is in the constant voltage charging mode and the charging current is smaller than the termination current, and/or the charging module charges the lithium battery in the constant voltage charging mode for the charging termination time;
the charging module disconnects the electric connection between the lithium battery and the charging source in the charging termination mode and enters a dormant state;
when monitoring that the voltage of the lithium battery is lower than the full-electricity voltage, the main control module controls the lithium battery to be electrically connected with the charging source through the charging module and recharges the lithium battery.
3. The charging management module of claim 1,
the main control module is further configured to:
when the real-time electric quantity is larger than the first electric quantity threshold value and the charging voltage is smaller than the maximum charging voltage, configuring the charging module to be in the second constant current charging mode;
and when the charging voltage reaches the maximum charging voltage, configuring the charging module to be in the constant-voltage charging mode.
4. The charging management module of claim 1,
when monitoring that the temperature of the charging module exceeds a temperature window, the main control module configures the charging module to be in the charging termination mode; if the temperature of the charging module is reduced to the temperature window within the first time in the charging termination mode, configuring the charging module to enter a recharging mode;
the charging module performs pre-charging on the lithium battery for a second time in the first constant current charging mode in the recharging mode, and performs recharging on the lithium battery for a third time in the second constant current charging mode when the pre-charging is completed; and if the temperature exceeds the temperature window in the recharging process, the main control module configures the charging module to be in a charging termination mode, finishes charging and gives an alarm.
5. The charging management module according to any one of claims 1 to 4, wherein the main control module is further configured to configure the charging module to enter the sleep state when detecting that the charging module is not connected to the lithium battery and/or the charging source.
6. The charging management module of any one of claims 1 to 4, wherein the charging module comprises:
the power interface is used for connecting the charging source;
the charging interface is used for connecting the lithium battery;
and the power management chip is respectively connected with the main control module, the power interface and the charging interface.
7. The charging management module of claim 6, wherein the master control module comprises:
the SPI interface is connected with the power management chip;
an external interface for connecting an external computer device;
an indicating unit;
and the single chip microcomputer is respectively connected with the SPI interface, the external interface and the indicating unit.
8. A charging management method is characterized in that the charging management method is applied to a charging management module;
the charge management module includes:
the charging module is used for being connected between a charging source and the lithium battery;
the main control module is connected with the charging module;
the charging management method comprises the following steps:
the main control module acquires initial electric quantity and real-time electric quantity of the lithium battery; the initial electric quantity is detected by the charging module when the lithium battery is accessed; the real-time electric quantity is detected by the charging module in the charging process of the lithium battery;
the main control module configures the charging module into a trickle charging mode when the initial electric quantity is smaller than a full discharging threshold value, and configures the charging module into a first constant current charging mode when the real-time electric quantity is larger than the full discharging threshold value until the real-time electric quantity is larger than a first electric quantity threshold value;
the main control module configures the charging module into the first constant current charging mode when the initial electric quantity is greater than the full discharge threshold and smaller than the first electric quantity threshold, and configures the charging module into the second constant current charging mode when the real-time electric quantity is greater than the first electric quantity threshold; wherein the constant current of the first constant current charging mode is less than the constant current of the second constant current charging mode;
when the initial electric quantity is larger than the first electric quantity threshold value, the main control module configures the charging module into the first constant current charging mode and charges the lithium battery for preset time; and when the charging within the preset time is finished, configuring the charging module into the second constant-current charging mode or the constant-voltage charging mode.
9. The charge management method according to claim 8, further comprising the steps of:
when the charging module meets a termination condition, the main control module configures the charging module to be in a charging termination mode, so that the charging module disconnects the electric connection between the lithium battery and the charging source in the charging termination mode and enters a dormant state; the terminal condition comprises that the charging module is in the constant voltage charging mode and the charging current is smaller than the terminal current, and/or the time for the charging module to charge the lithium battery in the constant voltage charging mode reaches the charging terminal time;
when monitoring that the voltage of the lithium battery is lower than the full-electricity voltage, the main control module controls the lithium battery to be electrically connected with the charging source through the charging module and recharges the lithium battery.
10. The charge management method according to claim 8, further comprising the steps of:
when monitoring that the temperature of the charging module exceeds a temperature window, the main control module configures the charging module to be in the charging termination mode; if the temperature of the charging module is reduced to the temperature window within the first time in the charging termination mode, configuring the charging module to enter a recharging mode; the recharging mode is that the charging module performs pre-charging on the lithium battery for a second time in the first constant current charging mode, and performs recharging on the lithium battery for a third time in the second constant current charging mode when the pre-charging is completed;
and when the temperature exceeds the temperature window in the recharging process, the main control module configures the charging module to be in a charging termination mode, finishes charging and gives an alarm prompt.
11. A charging management device is characterized in that the charging management device is applied to a charging management module;
the charge management module includes:
the charging module is used for being connected between a charging source and the lithium battery;
the main control module is connected with the charging module;
the charge management device set up in host system, the charge management device includes:
the electric quantity obtaining unit is used for obtaining the initial electric quantity and the real-time electric quantity of the lithium battery; the initial electric quantity is detected by the charging module when the lithium battery is accessed; the real-time electric quantity is detected by the charging module in the charging process of the lithium battery;
the first initial charging unit is used for configuring the charging module into a trickle charging mode when the initial electric quantity is smaller than a full discharging threshold value, and configuring the charging module into a first constant current charging mode when the real-time electric quantity is larger than the full discharging threshold value until the real-time electric quantity is larger than a first electric quantity threshold value;
the second initial charging unit is used for configuring the charging module into the first constant current charging mode when the initial electric quantity is larger than the full discharging threshold and smaller than the first electric quantity threshold, and configuring the charging module into the second constant current charging mode when the real-time electric quantity is larger than the first electric quantity threshold; wherein the constant current of the first constant current charging mode is less than the constant current of the second constant current charging mode;
the third initial charging unit is used for configuring the charging module into the first constant current charging mode and charging the lithium battery for preset time when the initial electric quantity is greater than the first electric quantity threshold value; and when the charging within the preset time is finished, configuring the charging module into the second constant-current charging mode or the constant-voltage charging mode.
12. A computer storage medium on which a computer program is stored, the program, when executed by a processor, implementing a charge management method according to any one of claims 8 to 10.
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Address after: 510663 Shenzhou Road 10, Guangzhou Science City, Guangzhou economic and Technological Development Zone, Guangzhou, Guangdong Applicant after: Jingxin Network System Co.,Ltd. Address before: 510663 Shenzhou Road 10, Guangzhou Science City, Guangzhou economic and Technological Development Zone, Guangzhou, Guangdong Applicant before: Comba Telecom System (China) Ltd. |
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