CN117375126A - Terminal equipment, charging control system, charging method and device - Google Patents
Terminal equipment, charging control system, charging method and device Download PDFInfo
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- CN117375126A CN117375126A CN202210772163.6A CN202210772163A CN117375126A CN 117375126 A CN117375126 A CN 117375126A CN 202210772163 A CN202210772163 A CN 202210772163A CN 117375126 A CN117375126 A CN 117375126A
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- 238000007600 charging Methods 0.000 title claims abstract description 82
- 238000000034 method Methods 0.000 title claims abstract description 42
- 238000010280 constant potential charging Methods 0.000 claims abstract description 32
- 238000010277 constant-current charging Methods 0.000 claims description 19
- 230000005611 electricity Effects 0.000 claims description 4
- 238000004590 computer program Methods 0.000 claims description 2
- 239000004020 conductor Substances 0.000 claims 2
- 238000010278 pulse charging Methods 0.000 abstract description 11
- 230000008569 process Effects 0.000 abstract description 8
- 230000002035 prolonged effect Effects 0.000 abstract description 6
- 238000004891 communication Methods 0.000 description 10
- 238000012545 processing Methods 0.000 description 9
- 238000005516 engineering process Methods 0.000 description 7
- 230000006870 function Effects 0.000 description 6
- 230000003287 optical effect Effects 0.000 description 4
- 230000005236 sound signal Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000001133 acceleration Effects 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
- 238000007726 management method Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000003491 array Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013500 data storage Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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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
- H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
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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
- H01M10/441—Methods for charging or discharging for several batteries or cells simultaneously or sequentially
-
- 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
-
- 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
- H02J7/00711—Regulation of charging or discharging current or voltage with introduction of pulses during the charging process
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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
- H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
- H02J7/007182—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters in response to battery voltage
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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
- H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
- H02J7/007182—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters in response to battery voltage
- H02J7/007184—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters in response to battery voltage in response to battery voltage gradient
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The present disclosure relates to a terminal device, a charging control system, a charging method and a device, wherein the method is applied to a terminal device having a battery with a plurality of cells, and the charging control system comprises: the protection circuit is used for being connected with a power supply; the switch circuit is connected with the protection circuit and is used for connecting at least one cell of the plurality of cells to the protection circuit; and the control circuit is used for controlling the switching circuit to sequentially connect each cell in the plurality of cells to the protection circuit. Thereby realizing the independent charging of each battery cell and balancing the energy of the battery cells; the pulse charging of the battery core can be realized, the charging speed in the constant-voltage charging stage is improved, the charging time is shortened, and the service life of the battery is prolonged; furthermore, because different electric cores are respectively charged in pulse mode, the electric cores are charged at any time in the charging process, and therefore the pulse charging is avoided, and the charging time is prolonged.
Description
Technical Field
The disclosure relates to the technical field of charging, and in particular relates to a terminal device, a charging control system, a charging method and a charging device.
Background
In recent years, functions of the terminal equipment are more and more abundant, and performances of various functions are gradually improved, but the functions also cause the increase of energy consumption of the terminal equipment, so that electric quantity requirements of the terminal equipment are greatly increased. Under the condition of limited battery capacity improvement, rapid charging technology is continuously developed to meet the increasing electric quantity demand, and the charging speed is improved. However, in the related art, the speed of the quick charge has yet to be improved, which makes the use experience of the user general.
Disclosure of Invention
In order to overcome the problems in the related art, embodiments of the present disclosure provide a terminal device, a charging control system, a charging method and a device, which are used for solving the defects in the related art.
According to a first aspect of embodiments of the present disclosure, there is provided a charge control system applied to a terminal device, a battery of the terminal device having a plurality of cells, the system comprising:
the protection circuit is used for being connected with a power supply;
the switch circuit is connected with the protection circuit and is used for connecting at least one cell of the plurality of cells to the protection circuit;
and the control circuit is used for controlling the switching circuit to sequentially connect each cell in the plurality of cells to the protection circuit.
In one embodiment, the control circuit is configured to control the switching circuit to sequentially connect each of the plurality of cells to the protection circuit during a constant voltage charging phase.
In one embodiment, the control circuit is configured to control the switching circuit to sequentially connect each of the plurality of cells to the protection circuit according to a preset waveform.
In one embodiment, the control circuit is further configured to detect a terminal voltage of each of the electrical cores, and control the switch circuit to connect at least one of the electrical cores to the protection circuit according to the terminal voltage of each of the electrical cores, so that a terminal voltage difference value of any two of the electrical cores is within a preset voltage difference range.
In one embodiment, the battery has a first cell and a second cell, and the control circuit is configured to control the switching circuit to alternately connect the first cell and the second cell to the protection circuit.
In one embodiment, the switching circuit includes a first wire and a second wire connected to the protection circuit, respectively, and a first switch, a second switch, a third switch, and a fourth switch;
the first electric core, the first switch, the second electric core and the second switch are sequentially connected, the first wire is respectively connected with one end of the first electric core far away from the first switch and one end of the third switch, the second wire is respectively connected with one end of the second switch far away from the second electric core and one end of the fourth switch, the other end of the third switch and the other end of the fourth switch are respectively connected with a third wire, and the third wire is a wire between the first switch and the second electric core;
the control circuit is respectively connected with the first switch, the second switch, the third switch and the fourth switch and is used for controlling the on-off of the first switch, the second switch, the third switch and the fourth switch.
In one embodiment, the switching circuit further includes a fourth wire connected to the protection circuit and the third wire, respectively;
the control circuit is respectively connected with the first wire, the second wire and the third wire and is used for acquiring the terminal voltage of the first battery cell through the first wire and the third wire and acquiring the terminal voltage of the second battery cell through the second wire and the third wire.
In one embodiment, the protection circuit includes a protection chip, an electricity meter, and a filter connected in sequence, wherein the filter is connected to the power source, and the protection chip is connected to the first wire, the second wire, and the fourth wire.
According to a second aspect of embodiments of the present disclosure, there is provided a terminal device including a battery having a plurality of electric cells and the charge control system of the first aspect.
According to a third aspect of embodiments of the present disclosure, there is provided a charging method including:
in a constant current charging stage of the battery, acquiring terminal voltage of each of a plurality of battery cells of the battery, and controlling the switch circuit to connect at least one battery cell of the plurality of battery cells to the protection circuit according to the terminal voltage of each battery cell so that terminal voltage difference values of any two battery cells of the plurality of battery cells are within a preset voltage difference range; and/or the number of the groups of groups,
and in a constant voltage charging stage of the battery, controlling the switching circuit to sequentially connect each of the plurality of battery cells to the protection circuit.
In one embodiment, the controlling the switch circuit according to the terminal voltage of each cell connects at least one cell of the plurality of cells to the protection circuit, so that the terminal voltage difference between any two cells of the plurality of cells is within a preset voltage difference range, includes:
and under the condition that the terminal voltage difference value of any two cells in the plurality of cells is within a preset voltage difference range, controlling the switch circuit to connect the plurality of cells in series and then connecting the plurality of cells to the protection circuit.
In one embodiment, the controlling the switching circuit to connect each of the plurality of cells to the protection circuit in turn includes:
and controlling the switch circuit to sequentially connect each of the plurality of battery cells to the protection circuit according to a preset waveform.
In one embodiment, the controlling the switching circuit to connect each of the plurality of cells to the protection circuit in turn includes:
the switching circuit is controlled to alternately connect the first cell and the second cell of the battery to the protection circuit.
In one embodiment, further comprising:
and under the condition that the terminal voltage of each of the plurality of battery cells is not smaller than the limiting voltage, switching from the constant-current charging stage to the constant-voltage charging stage.
According to a fourth aspect of embodiments of the present disclosure, there is provided a charging device including:
the constant current module is used for acquiring the terminal voltage of each of a plurality of battery cells of the battery in a constant current charging stage of the battery, and controlling the switch circuit to connect at least one battery cell of the plurality of battery cells to the protection circuit according to the terminal voltage of each battery cell so that the terminal voltage difference value of any two battery cells of the plurality of battery cells is within a preset voltage difference range; and/or the number of the groups of groups,
and the constant voltage module is used for controlling the switch circuit to sequentially connect each of the plurality of battery cells to the protection circuit in a constant voltage charging stage of the battery.
In one embodiment, the constant current module is specifically configured to:
and under the condition that the terminal voltage difference value of any two cells in the plurality of cells is within a preset voltage difference range, controlling the switch circuit to connect the plurality of cells in series and then connecting the plurality of cells to the protection circuit.
In one embodiment, the constant voltage module is specifically configured to:
and controlling the switch circuit to sequentially connect each of the plurality of battery cells to the protection circuit according to a preset waveform.
In one embodiment, the constant voltage module is specifically configured to:
the switching circuit is controlled to alternately connect the first cell and the second cell of the battery to the protection circuit.
In one embodiment, the method further comprises a switching module for:
and under the condition that the terminal voltage of each of the plurality of battery cells is not smaller than the limiting voltage, switching from the constant-current charging stage to the constant-voltage charging stage.
According to a fifth aspect of embodiments of the present disclosure, there is provided an electronic device comprising a memory for storing computer instructions executable on a processor for, when executing the computer instructions, based on the charging method of the third aspect.
According to a sixth aspect of embodiments of the present disclosure, there is provided a computer readable storage medium having stored thereon a computer program which, when executed by a processor, implements the method of the third aspect.
The technical scheme provided by the embodiment of the disclosure can comprise the following beneficial effects:
according to the charging control system provided by the embodiment of the disclosure, the protection circuit is arranged to be connected with the power supply and acquire electric energy from the power supply, the switching circuit is arranged to select at least one cell from a plurality of cells of the battery to be connected to the protection circuit, and finally the switching circuit is controlled to sequentially connect each cell to the protection circuit. Thereby realizing the independent charging of each battery cell and balancing the energy of the battery cells; the pulse charging of the battery core can be realized, the charging speed in the constant-voltage charging stage is improved, the charging time is shortened, and the service life of the battery is prolonged; furthermore, because different electric cores are respectively charged in pulse mode, the electric cores are charged at any time in the charging process, and therefore the pulse charging is avoided, and the charging time is prolonged.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
Fig. 1 is a schematic configuration diagram of a charge control device shown in an exemplary embodiment of the present disclosure;
fig. 2 is a schematic structural view of a charge control device shown in another exemplary embodiment of the present disclosure;
FIG. 3 is a flow chart of a charging method shown in an exemplary embodiment of the present disclosure;
fig. 4 is a flowchart of a charging method shown in another exemplary embodiment of the present disclosure;
fig. 5A is a graph of voltage and current variation during a constant voltage charging phase of a related art charging method;
fig. 5B is a graph of voltage and current variation during a constant voltage charging phase of a charging method according to an exemplary embodiment of the present disclosure;
fig. 6 is a schematic structural view of a charging device shown in an exemplary embodiment of the present disclosure;
fig. 7 is a block diagram of an electronic device shown in an exemplary embodiment of the present disclosure.
Detailed Description
Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The implementations described in the following exemplary examples are not representative of all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with some aspects of the present disclosure as detailed in the accompanying claims.
The terminology used in the present disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. As used in this disclosure and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any or all possible combinations of one or more of the associated listed items.
It should be understood that although the terms first, second, third, etc. may be used in this disclosure to describe various information, these information should not be limited to these terms. These terms are only used to distinguish one type of information from another. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope of the present disclosure. The word "if" as used herein may be interpreted as "at … …" or "at … …" or "responsive to a determination", depending on the context.
In recent years, functions of the terminal equipment are more and more abundant, and performances of various functions are gradually improved, but the functions also cause the increase of energy consumption of the terminal equipment, so that electric quantity requirements of the terminal equipment are greatly increased. Under the condition of limited battery capacity improvement, rapid charging technology is continuously developed to meet the increasing electric quantity demand, and the charging speed is improved. However, in the related art, the speed of the quick charge has yet to be improved, which makes the use experience of the user general.
For example, the charging process of the battery comprises a constant-current charging stage and a constant-voltage charging stage, wherein the current is kept unchanged in the constant-current charging stage, and the voltage is gradually increased; when the voltage rises to the limit voltage, the constant voltage charging stage starts to enter, the voltage is kept unchanged in the constant voltage charging stage, the current is gradually reduced, and the charging speed in the constant voltage charging stage is slower due to the reduction of the current.
Based on this, in a first aspect, at least one embodiment of the present disclosure provides a charging control system applied to a terminal device for charging a battery of the terminal device, which may have a plurality of battery cells. Referring to fig. 1, the system may include: a protection circuit 101, the protection circuit 101 being configured to be connected to a power source; a switch circuit 102 connected to the protection circuit 101 for connecting at least one of the plurality of battery cells to the protection circuit 101; a control circuit 103 for controlling the switch circuit 102 to sequentially connect each of the plurality of cells to the protection circuit 101.
The protection circuit 101 may be connected to a power supply through a charger, thereby obtaining electric power from the power supply. The switch circuit 102 may include a wire and at least one switch, and the on state of the switch circuit 102 may be switched by the on-off of each switch; in different conducting states, different electric cores can be connected to the protection circuit 101, so that the protection circuit 101 can transmit electric energy to the different electric cores, namely, the electric cores are charged. The switch of the switch circuit 102 can be a MOS tube switch, so that the switch is convenient and the control is flexible; further, the switch of the switch circuit 102 is preferably two opposite MOS switches, so that current and power transmission can be blocked bidirectionally when the switch is turned off.
The control circuit 103 may include a control chip, which may have a plurality of control pins, each pin being connected to one switch and controlling the on-off of the switch, so that the control circuit 103 may select a cell connected to the protection current by controlling the on-off of each switch.
The control circuit 103 may control the switching circuit 102 to sequentially connect each of the plurality of cells to the protection circuit 101 in the constant voltage charging stage. For example, the switching circuit 102 may be controlled to sequentially connect each of the plurality of battery cells to the protection circuit 101 according to a preset waveform (e.g., PWM waveform), thereby implementing pulse charging. For example, the plurality of electric cores may be divided into a plurality of groups, each group includes one electric core or a plurality of electric cores connected in series, the number of electric cores included in each group may be the same or different, and then each group of electric cores is controlled to be connected to the protection circuit 101 in sequence according to the PWM waveform.
According to the charging control system provided by the embodiment of the disclosure, the protection circuit 101 can be connected with a power supply to obtain electric energy from the power supply, the switch circuit 102 is arranged, at least one cell can be selected from a plurality of cells of a battery to be connected to the protection circuit 101, and finally the switch circuit 102 can be controlled to sequentially connect each cell to the protection circuit 101 through the control circuit 103. Thereby realizing the independent charging of each battery cell and balancing the energy of the battery cells; the pulse charging of the battery core can be realized, the charging speed in the constant-voltage charging stage is improved, the charging time is shortened, and the service life of the battery is prolonged; furthermore, because different electric cores are respectively charged in pulse mode, the electric cores are charged at any time in the charging process, and therefore the pulse charging is avoided, and the charging time is prolonged.
In some embodiments of the present disclosure, during the constant current charging stage, the control circuit 103 is further configured to detect a terminal voltage of each of the battery cells, and control the switch circuit 102 to connect at least one of the plurality of battery cells to the protection circuit 101 according to the terminal voltage of each of the battery cells, so that a terminal voltage difference value of any two of the plurality of battery cells is within a preset voltage difference range. Optionally, the control circuit 103 may further control the switch circuit 102 to connect the plurality of cells to the protection circuit 101 after the plurality of cells are connected in series when the terminal voltage difference between any two of the plurality of cells is within a preset voltage difference range, and switch from the constant current charging stage to the constant voltage charging stage when the terminal voltage of each of the plurality of cells is not less than the limiting voltage. For example, the control cell has a plurality of voltage pins for detecting the terminal voltage of the cell.
The capacity or voltage difference of the multi-cell battery occurs during the use process, and thus, the difference needs to be reduced during the discharging process of the battery. In the related art, an equalization circuit is adopted to reduce the difference, but the equalization circuit realizes passive equalization through resistance discharge shunt, which causes capacity loss and cannot realize the full utilization of electric quantity. In this embodiment, the control circuit 103 monitors the terminal voltage of each cell, so as to charge the cells individually when the terminal voltage of each cell is lower than the terminal voltages of other cells, thereby realizing charge balance without causing power loss.
In some embodiments of the present disclosure, the battery has a first cell and a second cell, and the control circuit 103 is configured to control the switch circuit 102 to alternately connect the first cell and the second cell to the protection circuit 101.
Referring to fig. 2, the switch circuit 102 includes a first conductive line and a second conductive line connected to the protection circuit 101, and a first switch Q1, a second switch Q2, a third switch Q3, and a fourth switch Q4; the first electric core Cell1, the first switch Q1, the second electric core Cell2 and the second switch Q2 are sequentially connected, the first wire is respectively connected with one end of the first electric core Cell1, which is far away from the first switch Q1, and one end of the third switch Q3, the second wire is respectively connected with one end of the second switch Q2, which is far away from the second electric core Cell2, and one end of the fourth switch Q4, the other end of the third switch Q3 and the other end of the fourth switch Q4 are respectively connected with a third wire, and the third wire is a wire between the first switch Q1 and the second electric core Cell 2; the control circuit 103 is connected to the first switch Q1, the second switch Q2, the third switch Q3, and the fourth switch Q4, respectively, and is configured to control on/off of the first switch Q1, the second switch Q2, the third switch Q3, and the fourth switch Q4. The first switch Q1, the second switch Q2, the third switch Q3, and the fourth switch Q4 are two MOS transistor switches disposed opposite to each other; the control circuit 103 is a control chip, the control chip is provided with four control pins OUT1, OUT2, OUT3 and OUT4, the control pin OUT1 is connected with the first switch Q1 and used for controlling the on-off of the first switch Q1, the control pin OUT2 is connected with the second switch Q2 and used for controlling the on-off of the second switch Q2, the control pin OUT3 is connected with the third switch Q3 and used for controlling the on-off of the third switch Q3, and the control pin OUT4 is connected with the fourth switch Q4 and used for controlling the on-off of the fourth switch Q4. For example, the control pin may cause the corresponding switch to be on (i.e., open) by outputting a high level to the corresponding switch and off (i.e., close) by outputting a low level to the corresponding switch.
As can be seen from fig. 2, when the first switch Q1 and the second switch Q2 are turned on and the third switch Q3 and the fourth switch Q4 are turned off, the first Cell1 and the second Cell2 are connected in series and then connected to the protection circuit 101; when the first switch Q1 and the fourth switch Q4 are turned on and the second switch Q2 and the third switch Q3 are turned off, the first Cell1 is separately connected to the protection circuit 101, and the second Cell is bypassed; when the second switch Q2 and the third switch Q3 are turned on and the first switch Q1 and the fourth switch Q4 are turned off, the second Cell2 is individually connected to the protection circuit 101, and the first Cell1 is bypassed.
With continued reference to fig. 2, the switch circuit 102 further includes a fourth wire connected to the protection circuit 101 and the third wire, respectively; the control circuit 103 is connected to the first wire, the second wire, and the third wire, and is configured to obtain a terminal voltage of the first Cell1 through the first wire and the third wire, and obtain a terminal voltage of the second Cell2 through the second wire and the third wire. The control chip further has three voltage pins V1, V2 and V3, the voltage pin V1 is connected to the first wire, the voltage pin V2 is connected to the third wire, and the voltage pin V3 is connected to the second wire, so that a voltage difference between the two voltage pins of the control chip V1 and V2 is a terminal voltage of the first Cell1, and a voltage difference between the two voltage pins of the control chip V3 and V2 is a terminal voltage of the second Cell 2.
In addition, the control chip is also provided with a power supply pin VSS and a ground pin GND, wherein the power supply pin VSS is connected with the second wire, the ground pin GND is connected with the first wire, and power can be supplied to the control chip through the power supply pin VSS and the ground pin GND so as to maintain the normal operation of the control chip.
With continued reference to fig. 2, the protection circuit 101 may include a protection chip 1011, an electricity meter 1012, and a filter 1013 connected in sequence, where the filter 1013 is connected to a power source, and the protection chip 1011 is connected to the first wire, the second wire, and the fourth wire.
In this embodiment, in the charge control system shown in fig. 2, in the constant current charging stage, the first Cell1 and the second Cell2 may be connected in series and then connected to the protection circuit 101 for charging, and the equalization charge of the first Cell1 and the second Cell2 is realized by monitoring the difference value of the terminal voltages of the first Cell1 and the second Cell 2. For example, if the difference between the terminal voltages of the first Cell1 and the second Cell2 exceeds the preset voltage difference range, the second Cell2 may be charged to a voltage difference between the terminal voltages of the two cells within the preset voltage difference range; if the difference between the terminal voltages of the second Cell2 and the first Cell1 exceeds the preset voltage difference range, the first Cell1 may be charged to a voltage difference between the terminal voltages of the two cells that is smaller than the preset voltage difference range. After the terminal voltages of the two battery cores reach the limiting voltage, the constant-current charging stage can be switched to the constant-voltage charging stage.
In the constant voltage charging stage, the control circuit 103 may control the first Cell1 and the second Cell2 to be alternately connected to the protection circuit 101 to be charged according to the PWM wave, thereby realizing pulse charging of the first Cell1 and the second Cell 2. When the first Cell1 is connected to the protection circuit 101, the second Cell2 is bypassed, so that the voltage of the second Cell2 is rapidly reduced by the limiting voltage, and the current is increased accordingly; when the two battery cells are switched, the voltage drop current of the first battery Cell1 is increased after being bypassed, the second battery Cell2 is connected to the protection circuit 101, and the voltage is increased to the limiting voltage by charging with the increased current, and the connection state of the two battery cells is switched again. Therefore, pulse charging of two battery cores is realized, and when one battery core is bypassed, the other battery core is charged, so that time waste and extension of charging time are avoided. It will be appreciated that the alternating frequency of the first Cell1 and the second Cell2 may be adjusted by adjusting the frequency and the duty cycle of the PWM.
According to a second aspect of embodiments of the present disclosure, there is provided a terminal device including a battery having a plurality of electric cells and the charge control system of the first aspect.
According to a third aspect of embodiments of the present disclosure, there is provided a charging method, which may be applied to the charging control system described in the first aspect or the terminal device described in the second aspect, and in particular may be applied to a control circuit. Referring to fig. 3, a flow of the method is shown, including step S301 and/or step S302.
In step S301, in a constant current charging stage of the battery, obtaining a terminal voltage of each of a plurality of battery cells of the battery, and controlling the switch circuit to connect at least one of the plurality of battery cells to the protection circuit according to the terminal voltage of each battery cell, so that a terminal voltage difference value of any two battery cells in the plurality of battery cells is within a preset voltage difference range;
in one example, in a case that a terminal voltage difference value of any two cells in the plurality of cells is within a preset voltage difference range, the switch circuit is controlled to connect the plurality of cells in series and then to connect the plurality of cells to the protection circuit.
In another example, the constant current charging phase is switched to the constant voltage charging phase in the case where the terminal voltage of each of the plurality of cells is not less than the limit voltage.
In step S302, the switching circuit is controlled to sequentially connect each of the plurality of cells to the protection circuit in a constant voltage charging stage of the battery.
Optionally, according to a preset waveform, the switch circuit is controlled to sequentially connect each of the plurality of battery cells to the protection circuit. For example, according to a PWM wave, the switching circuit is controlled to sequentially connect each of the plurality of cells to the protection circuit.
In one example, the switching circuit may be controlled to alternately connect the first and second cells of the battery to the protection circuit.
Details of the foregoing steps are described in more detail when describing the charging control system in the first aspect, and are not repeated here.
In some embodiments of the present disclosure, the charging method is applied to a control chip of a charging control system as shown in fig. 2, and a flow of the method is described in detail below with reference to fig. 4.
Firstly, starting charging, when the charging is started, conducting Q1 and Q2, closing Q3 and Q4, and realizing series connection electricity transmission of two battery cores; then the control chip respectively collects terminal voltages of the two battery cores; and then judging whether the terminal voltages of the two battery cells reach the limit voltage.
If the terminal voltages of the two electric cores do not reach the limiting voltage, continuously judging whether the difference value of the terminal voltages of the two electric cores is within a preset voltage difference range, if the difference value is within the preset voltage difference range, returning to the step of judging whether the terminal voltages of the two electric cores reach the limiting voltage, if the difference value is not within the preset voltage difference range and the terminal voltage of the first electric core Cell1 is higher than the terminal voltage of the second electric core Cell2, controlling to close Q2 and Q3, opening Q1 and Q4, and independently charging the first electric core Cell1, and if the difference value is not within the preset voltage difference range and the terminal voltage of the second electric core Cell2 is higher than the terminal voltage of the first electric core Cell1, controlling to close Q1 and Q4, opening Q2 and Q3, and independently charging the second electric core Cell 2.
If the terminal voltages of the two electric cores reach the limiting voltage, the first electric core Cell1 and the second electric core Cell2 are respectively and alternately conducted, namely PWM waves with a fixed duty ratio are output through 4 control pins of the control chip, and the PWM waves control Q1, Q2 and Q3 to be alternately opened and closed in groups. When Q1 and Q4 are closed, the second Cell2 is charged independently, the first Cell1 is bypassed, and the terminal voltage is reduced; when Q2 and Q3 are off, the first Cell1 is charged alone, the first Cell2 is bypassed, and the terminal voltage drops.
Referring to fig. 5A and 5B, voltage-current variation curves at the constant voltage charging stage are shown for the charging method in the related art and the charging method in the present embodiment, respectively. As can be seen from fig. 5A, after constant current charging, the two battery cells reach a constant voltage charging stage, the current voltage is 4.48V, the charging current is 5A, and the charging current is continuously reduced in the constant voltage charging process. As can be seen from fig. 5B, pulse charging of the single cells is achieved during constant voltage charging. During pulse charging, the battery terminal voltage drops after the charging current is bypassed, allowing for charging with a greater charging current. And the battery terminal voltage is maintained at about 4.48V of the charging limit voltage by alternating charging and suspending. Therefore, by adopting the charging method provided by the embodiment, the charging rate in the constant voltage charging process can be improved, and the charging time can be shortened.
According to a fourth aspect of the embodiments of the present disclosure, a charging device is provided, referring to fig. 6, the device includes:
the constant current module 601 is configured to obtain a terminal voltage of each of a plurality of battery cells of the battery in a constant current charging stage of the battery, and control the switch circuit to connect at least one of the plurality of battery cells to the protection circuit according to the terminal voltage of each battery cell, so that a terminal voltage difference value of any two battery cells in the plurality of battery cells is within a preset voltage difference range; and/or the number of the groups of groups,
and a constant voltage module 602, configured to control the switching circuit to sequentially connect each of the plurality of battery cells to the protection circuit during a constant voltage charging phase of the battery.
In some embodiments of the present disclosure, the constant current module is specifically configured to:
and under the condition that the terminal voltage difference value of any two cells in the plurality of cells is within a preset voltage difference range, controlling the switch circuit to connect the plurality of cells in series and then connecting the plurality of cells to the protection circuit.
In some embodiments of the present disclosure, the constant voltage module is specifically configured to:
and controlling the switch circuit to sequentially connect each of the plurality of battery cells to the protection circuit according to a preset waveform.
In some embodiments of the present disclosure, the constant voltage module is specifically configured to:
the switching circuit is controlled to alternately connect the first cell and the second cell of the battery to the protection circuit.
In some embodiments of the present disclosure, a switching module is further included for:
and under the condition that the terminal voltage of each of the plurality of battery cells is not smaller than the limiting voltage, switching from the constant-current charging stage to the constant-voltage charging stage.
The specific manner in which the various modules perform the operations in relation to the apparatus of the above embodiments has been described in detail in relation to the embodiments of the method of the first aspect and will not be described in detail here.
In accordance with a third aspect of embodiments of the present disclosure, reference is made to fig. 7, which schematically illustrates a block diagram of an electronic device. For example, apparatus 700 may be a mobile phone, computer, digital broadcast terminal, messaging device, game console, tablet device, medical device, exercise device, personal digital assistant, or the like.
Referring to fig. 7, an apparatus 700 may include one or more of the following components: a processing component 702, a memory 704, a power component 706, a multimedia component 708, an audio component 710, an input/output (I/O) interface 712, a sensor component 714, and a communication component 716.
The processing component 702 generally controls overall operation of the apparatus 700, such as operations associated with display, telephone calls, data communications, camera operations, and recording operations. The processing element 702 may include one or more processors 720 to execute instructions to perform all or part of the steps of the methods described above. Further, the processing component 702 can include one or more modules that facilitate interaction between the processing component 702 and other components. For example, the processing component 702 may include a multimedia module to facilitate interaction between the multimedia component 708 and the processing component 702.
Memory 704 is configured to store various types of data to support operations at device 700. Examples of such data include instructions for any application or method operating on the apparatus 700, contact data, phonebook data, messages, pictures, videos, and the like. The memory 704 may be implemented by any type or combination of volatile or nonvolatile memory devices such as Static Random Access Memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic or optical disk.
The power component 706 provides power to the various components of the device 700. Power component 706 can include a power management system, one or more power sources, and other components associated with generating, managing, and distributing power for device 700.
The multimedia component 708 includes a screen between the device 700 and the user that provides an output interface. In some embodiments, the screen may include a Liquid Crystal Display (LCD) and a Touch Panel (TP). If the screen includes a touch panel, the screen may be implemented as a touch screen to receive input signals from a user. The touch panel includes one or more touch sensors to sense touch, swipe, and gestures on the touch panel. The touch sensor may sense not only the boundary of a touch or sliding action, but also the duration and pressure associated with the touch or sliding operation. In some embodiments, the multimedia component 708 includes a front-facing camera and/or a rear-facing camera. The front-facing camera and/or the rear-facing camera may receive external multimedia data when the apparatus 700 is in an operational mode, such as a photographing mode or a video mode. Each front camera and rear camera may be a fixed optical lens system or have focal length and optical zoom capabilities.
The audio component 710 is configured to output and/or input audio signals. For example, the audio component 710 includes a Microphone (MIC) configured to receive external audio signals when the device 700 is in an operational mode, such as a call mode, a recording mode, and a voice recognition mode. The received audio signals may be further stored in the memory 704 or transmitted via the communication component 716. In some embodiments, the audio component 710 further includes a speaker for outputting audio signals.
The I/O interface 712 provides an interface between the processing component 702 and peripheral interface modules, which may be a keyboard, click wheel, buttons, etc. These buttons may include, but are not limited to: homepage button, volume button, start button, and lock button.
The sensor assembly 714 includes one or more sensors for providing status assessment of various aspects of the apparatus 700. For example, the sensor assembly 714 may detect an on/off state of the device 700, a relative positioning of the components, such as a display and keypad of the device 700, a change in position of the device 700 or a component of the device 700, the presence or absence of user contact with the device 700, an orientation or acceleration/deceleration of the device 700, and a change in temperature of the device 700. The sensor assembly 714 may also include a proximity sensor configured to detect the presence of nearby objects in the absence of any physical contact. The sensor assembly 714 may also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor assembly 714 may also include an acceleration sensor, a gyroscopic sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.
The communication component 716 is configured to facilitate communication between the apparatus 700 and other devices in a wired or wireless manner. The device 700 may access a wireless network based on a communication standard, such as WiFi,2G or 3G,4G or 5G, or a combination thereof. In one exemplary embodiment, the communication part 716 receives a broadcast signal or broadcast related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 716 further includes a Near Field Communication (NFC) module to facilitate short range communications. For example, the NFC module may be implemented based on Radio Frequency Identification (RFID) technology, infrared data association (IrDA) technology, ultra Wideband (UWB) technology, bluetooth (BT) technology, and other technologies.
In an exemplary embodiment, the apparatus 700 may be implemented by one or more Application Specific Integrated Circuits (ASICs), digital Signal Processors (DSPs), digital Signal Processing Devices (DSPDs), programmable Logic Devices (PLDs), field Programmable Gate Arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic elements for performing the power supply methods of electronic devices described above.
In a fourth aspect, the present disclosure also provides, in an exemplary embodiment, a non-transitory computer-readable storage medium, such as memory 704, comprising instructions executable by processor 720 of apparatus 700 to perform the method of powering an electronic device described above. For example, the non-transitory computer readable storage medium may be ROM, random Access Memory (RAM), CD-ROM, magnetic tape, floppy disk, optical data storage device, etc.
Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any adaptations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.
It is to be understood that the present disclosure is not limited to the precise arrangements and instrumentalities shown in the drawings, and that various modifications and changes may be effected without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.
Claims (21)
1. A charge control system, characterized by being applied to a terminal device, a battery of which has a plurality of cells, the system comprising:
the protection circuit is used for being connected with a power supply;
the switch circuit is connected with the protection circuit and is used for connecting at least one cell of the plurality of cells to the protection circuit;
and the control circuit is used for controlling the switching circuit to sequentially connect each cell in the plurality of cells to the protection circuit.
2. The charge control system of claim 1, wherein the control circuit is configured to control the switching circuit to sequentially connect each of the plurality of cells to the protection circuit during a constant voltage charging phase.
3. The charge control system of claim 1, wherein the control circuit is configured to control the switching circuit to sequentially connect each of the plurality of cells to the protection circuit according to a preset waveform.
4. The charge control system of claim 1, wherein the control circuit is further configured to detect a terminal voltage of each of the plurality of cells, and control the switching circuit to connect at least one of the plurality of cells to the protection circuit according to the terminal voltage of each of the plurality of cells such that a terminal voltage difference between any two of the plurality of cells is within a preset voltage difference range.
5. The charge control system of any one of claims 1 to 4 wherein the battery has a first cell and a second cell, the control circuit being configured to control the switching circuit to alternately connect the first cell and the second cell to the protection circuit.
6. The charge control system of claim 5, wherein the switching circuit comprises a first conductor and a second conductor connected to the protection circuit, respectively, and a first switch, a second switch, a third switch, and a fourth switch;
the first electric core, the first switch, the second electric core and the second switch are sequentially connected, the first wire is respectively connected with one end of the first electric core far away from the first switch and one end of the third switch, the second wire is respectively connected with one end of the second switch far away from the second electric core and one end of the fourth switch, the other end of the third switch and the other end of the fourth switch are respectively connected with a third wire, and the third wire is a wire between the first switch and the second electric core;
the control circuit is respectively connected with the first switch, the second switch, the third switch and the fourth switch and is used for controlling the on-off of the first switch, the second switch, the third switch and the fourth switch.
7. The charge control system according to claim 6, wherein the switching circuit further includes fourth wires connected to the protection circuit and the third wire, respectively;
the control circuit is respectively connected with the first wire, the second wire and the third wire and is used for acquiring the terminal voltage of the first battery cell through the first wire and the third wire and acquiring the terminal voltage of the second battery cell through the second wire and the third wire.
8. The charge control system of claim 7, wherein the protection circuit comprises a protection chip, an electricity meter, and a filter connected in sequence, wherein the filter is connected to the power source, and wherein the protection chip is connected to the first wire, the second wire, and the fourth wire.
9. A terminal device comprising a battery having a plurality of cells and a charge control system as claimed in any one of claims 1 to 8.
10. A charging method, comprising:
in a constant current charging stage of a battery, acquiring terminal voltage of each of a plurality of battery cells of the battery, and controlling a switch circuit to connect at least one battery cell of the plurality of battery cells to a protection circuit according to the terminal voltage of each battery cell so that terminal voltage difference values of any two battery cells of the plurality of battery cells are within a preset differential pressure range; and/or the number of the groups of groups,
and in a constant voltage charging stage of the battery, controlling the switching circuit to sequentially connect each of the plurality of battery cells to the protection circuit.
11. The charging method according to claim 10, wherein the controlling the switching circuit to connect at least one of the plurality of cells to the protection circuit according to the terminal voltage of each cell so that the terminal voltage difference between any two of the plurality of cells is within a preset voltage difference range includes:
and under the condition that the terminal voltage difference value of any two cells in the plurality of cells is within a preset voltage difference range, controlling the switch circuit to connect the plurality of cells in series and then connecting the plurality of cells to the protection circuit.
12. The charging method of claim 10, wherein the controlling the switching circuit to sequentially connect each of the plurality of cells to the protection circuit comprises:
and controlling the switch circuit to sequentially connect each of the plurality of battery cells to the protection circuit according to a preset waveform.
13. The charging method of claim 10, wherein the controlling the switching circuit to sequentially connect each of the plurality of cells to the protection circuit comprises:
the switching circuit is controlled to alternately connect the first cell and the second cell of the battery to the protection circuit.
14. The charging method according to claim 10, characterized by further comprising:
and under the condition that the terminal voltage of each of the plurality of battery cells is not smaller than the limiting voltage, switching from the constant-current charging stage to the constant-voltage charging stage.
15. A charging device, characterized by comprising:
the constant current module is used for acquiring the terminal voltage of each of a plurality of battery cells of the battery in a constant current charging stage of the battery, and controlling the switch circuit to connect at least one battery cell of the plurality of battery cells to the protection circuit according to the terminal voltage of each battery cell so that the terminal voltage difference value of any two battery cells of the plurality of battery cells is within a preset differential pressure range; and/or the number of the groups of groups,
and the constant voltage module is used for controlling the switch circuit to sequentially connect each of the plurality of battery cells to the protection circuit in a constant voltage charging stage of the battery.
16. The charging device according to claim 15, wherein the constant current module is specifically configured to:
and under the condition that the terminal voltage difference value of any two cells in the plurality of cells is within a preset voltage difference range, controlling the switch circuit to connect the plurality of cells in series and then connecting the plurality of cells to the protection circuit.
17. The charging device according to claim 15, wherein the constant voltage module is specifically configured to:
and controlling the switch circuit to sequentially connect each of the plurality of battery cells to the protection circuit according to a preset waveform.
18. The charging device according to claim 15, wherein the constant voltage module is specifically configured to:
the switching circuit is controlled to alternately connect the first cell and the second cell of the battery to the protection circuit.
19. The charging device of claim 15, further comprising a switching module for:
and under the condition that the terminal voltage of each of the plurality of battery cells is not smaller than the limiting voltage, switching from the constant-current charging stage to the constant-voltage charging stage.
20. An electronic device comprising a memory, a processor for storing computer instructions executable on the processor, the processor for executing the computer instructions based on the charging method of any one of claims 10 to 14.
21. A computer readable storage medium, on which a computer program is stored, characterized in that the program, when being executed by a processor, implements the method of any of claims 10 to 14.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210772163.6A CN117375126A (en) | 2022-06-30 | 2022-06-30 | Terminal equipment, charging control system, charging method and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210772163.6A CN117375126A (en) | 2022-06-30 | 2022-06-30 | Terminal equipment, charging control system, charging method and device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117375126A true CN117375126A (en) | 2024-01-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210772163.6A Pending CN117375126A (en) | 2022-06-30 | 2022-06-30 | Terminal equipment, charging control system, charging method and device |
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| Country | Link |
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| CN (1) | CN117375126A (en) |
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- 2022-06-30 CN CN202210772163.6A patent/CN117375126A/en active Pending
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