CN111313489B - Electronic device, charging method and storage medium - Google Patents
Electronic device, charging method and storage medium Download PDFInfo
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- CN111313489B CN111313489B CN201811509966.2A CN201811509966A CN111313489B CN 111313489 B CN111313489 B CN 111313489B CN 201811509966 A CN201811509966 A CN 201811509966A CN 111313489 B CN111313489 B CN 111313489B
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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
- H02J7/0014—Circuits for equalisation of charge between batteries
- H02J7/0019—Circuits for equalisation of charge between batteries using switched or multiplexed charge circuits
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Abstract
The embodiment of the application discloses electronic equipment, a charging method and a storage medium, wherein the electronic equipment comprises: the system comprises N charging paths and a control module, wherein each charging path is provided with a power conversion module and a single battery cell; n is an integer greater than or equal to 2; the control module is configured to: acquiring a state parameter value of each single battery cell in a charging state; controlling the output power of each power conversion module based on each state parameter value so as to keep the state parameter value of each single battery cell within the same preset range; each of the power conversion modules is configured to: and charging the corresponding single battery cell according to the output power indicated by the control module.
Description
Technical Field
The embodiments of the present application relate to electronic technology, and relate to, but are not limited to, an electronic device, a charging method, and a storage medium.
Background
With the development of electronic technology, mobile terminals can meet various requirements of people in daily life and work, and people have stronger and stronger dependence on the mobile terminals. The frequent use of the mobile terminal by the user increases the electricity consumption speed of the mobile terminal, which causes the frequent charging of the mobile terminal, and therefore, how to rapidly charge the mobile terminal becomes one of the concerns.
Disclosure of Invention
In view of the above, embodiments of the present application provide an electronic device, a charging method, and a storage medium to solve at least one problem in the related art.
The technical scheme of the embodiment of the application is realized as follows:
in a first aspect, an embodiment of the present application provides an electronic device, where the electronic device includes: the system comprises N charging paths and a control module, wherein each charging path is provided with a power conversion module and a single battery cell; n is an integer greater than or equal to 2; wherein the content of the first and second substances,
the control module is configured to: acquiring a state parameter value of each single battery cell in a charging state; controlling the output power of each power conversion module based on each state parameter value so as to keep the state parameter value of each single battery cell within the same preset range;
each of the power conversion modules is configured to: and charging the corresponding single battery cell according to the output power indicated by the control module.
In a second aspect, an embodiment of the present application provides a charging method, where the method includes:
acquiring state parameter values of N single-section battery cells in a charging state, wherein the N single-section battery cells are respectively arranged on N charging paths, and N is an integer greater than or equal to 2;
determining the output power of each power conversion module based on each state parameter value, wherein each single battery cell is connected with one power conversion module;
and controlling the power conversion module corresponding to each single battery cell to output corresponding output power to charge the corresponding single battery cell so as to keep the state parameter value of each single battery cell within the same preset range.
In a third aspect, an embodiment of the present application provides a computer-readable storage medium, on which a computer program is stored, and the computer program, when executed by a processor, implements the steps in the charging method described above.
In the embodiment of the application, an electronic device, a charging method and a storage medium are provided, in which the electronic device includes N charging paths, each charging path has a power conversion module and a single battery cell, and thus, when the voltage of a certain single battery cell needs to be balanced, the purpose of balancing the voltage of the battery cell can be achieved only by adjusting the output power of the power conversion module corresponding to the single battery cell, thereby avoiding the problem of increased charging duration caused by balancing the voltage of the battery cell by adding a balancing circuit.
Drawings
Fig. 1 is a schematic structural diagram of an electronic device according to an embodiment of the present disclosure;
fig. 2 is a schematic structural diagram of another electronic device according to an embodiment of the present application;
fig. 3A is a schematic structural diagram of another electronic device according to an embodiment of the present application;
fig. 3B is a schematic structural diagram of another electronic device according to an embodiment of the present application;
fig. 3C is a schematic structural diagram of another electronic device according to an embodiment of the present application;
FIG. 4 is a schematic diagram of a component structure of another electronic device according to an embodiment of the present application;
FIG. 5 is a schematic diagram of a structure of another electronic device according to an embodiment of the present application;
fig. 6 is a schematic flow chart illustrating an implementation of a charging method according to an embodiment of the present application;
fig. 7 is a hardware entity diagram of an electronic device according to an embodiment of the present application.
Detailed Description
The technical solution of the present application is further elaborated below with reference to the drawings and the embodiments.
In recent years, in order to increase the charging speed of a mobile terminal (i.e., the electronic device), a battery composed of a plurality of battery cells is increasingly used for the mobile terminal. Taking a mobile phone as an example, when a battery of the mobile phone includes a battery cell, when the mobile phone is charged, a voltage across the battery cell is generally between 3.0 volts (Volt) and 4.35V. When the battery of the mobile phone comprises two battery cores connected in series, the total voltage of the two battery cores connected in series is 6.0V to 8.7V. Compared with a single battery cell, the charging speed is equivalent, and the charging current required by the multiple battery cells is about 1/N of the charging current required by the single battery cell (wherein N is the number of the battery cells connected in series in the mobile terminal). In other words, on the premise of ensuring the same charging speed (i.e., the same charging power), the scheme of multiple cell batteries is adopted, so that the magnitude of the charging current can be reduced, and the heat productivity of the mobile terminal in the charging process can be reduced. On the other hand, compared with a mobile terminal with only one battery cell, when the mobile terminal is charged, the mobile terminal with the multiple battery cells has higher charging voltage and higher charging speed, and can complete charging in a shorter time.
In the process of charging a mobile terminal having multiple battery cells, in order to prolong the service life of the battery cells, the voltage of each battery cell needs to be kept consistent. A common method for equalizing cell voltages is: and the two ends of each battery cell are connected with an equalizing circuit, and the voltages at the two ends of the battery cells are equalized through the equalizing circuits, so that the voltages of the battery cells are consistent.
For example, as shown in fig. 1, the electronic device 10 includes: a charging path 11 and a load 12; the charging path 11 is provided with a power conversion module 111 and N single battery cells (for example, battery cell B1 to battery cell BN in fig. 1, where N is an integer greater than or equal to 1), a positive electrode of each single battery cell is connected to a negative electrode of an adjacent single battery cell, so that the N single battery cells form a battery pack 113, the battery pack 113 has a positive electrode 1131 and a negative electrode 1132, and the negative electrode of the battery pack 113 is grounded; two ends of each single battery cell are connected with an equalizing circuit, namely an equalizing circuit 1 to an equalizing circuit N in fig. 1; wherein the content of the first and second substances,
the battery pack 113 is connected to the power conversion module 111, so that after the power conversion module 111 is powered on (for example, as shown in fig. 1, the power conversion module 111 is connected to an adapter connected to a commercial power), the power conversion module 111 charges each single battery cell in the battery pack 113, and in the charging process, each equalization circuit adjusts the voltage of the corresponding single battery cell according to the voltage of the corresponding connected single battery cell. The simplest balancing circuit is a load consumption type balancing circuit, that is, a resistor is connected in parallel to each single battery cell, and a switch is connected in series to the resistor, so as to control the connection state between the resistor and the corresponding single battery cell. When the voltage of a certain section of battery cell is too high, the equalizing circuit corresponding to the battery cell is closed, the charging current is shunted through the resistor, and the voltage of the battery cell is reduced by reducing the current flowing into the battery cell. In practice, of course, the equalization circuit has more implementation manners, including an active equalization manner and a passive equalization manner, and the composition structure and the operation manner of the equalization circuit are not described too much here.
The battery pack 113 is connected to the load 12 and supplies power to the load 12.
In the embodiment corresponding to fig. 1 of the present application, when charging multiple battery cells, the multiple battery cells are charged through one charging path, that is, the multiple battery cells correspond to one power conversion module; therefore, an equalizing circuit must be added at two ends of each battery cell to equalize the cell voltage; however, since the cell energy is consumed when the equalization circuit operates, the charging time of the electronic device is affected.
In view of the above, in order to solve the above technical problem, another electronic device is provided in the following embodiments, generally, the electronic device has multiple battery cells, and the electronic device may be various types of devices having the capability of equalizing the battery cell voltage during implementation, for example, the electronic device may include a mobile phone, a tablet computer, a desktop computer, a personal digital assistant, a navigator, a digital phone, a video phone, a television, a sensing device, and the like.
Fig. 2 is a schematic structural diagram of another electronic device according to an embodiment of the present application, and as shown in fig. 2, the electronic device 20 includes: the battery pack comprises a control module 21 and N charging paths, wherein each charging path is provided with a power conversion module (namely, the power conversion module 1 to the power conversion module N shown in fig. 2) and a single battery cell (namely, the battery cell B1 to the battery cell BN shown in fig. 2); n is an integer greater than or equal to 2; wherein the content of the first and second substances,
a battery pack 230 composed of N single battery cells, configured to: supplying power to a load in the electronic device 20; as shown in fig. 2, the positive electrode of each single cell is connected to the negative electrode of the adjacent single cell, so that N single cells form a battery pack 230, the battery pack 230 has a positive electrode 2301 and a negative electrode 2302, in practical product development, a plurality of single cells are connected in series to form the battery pack 230, the battery pack 230 and a battery protection board are packaged into a whole together, and the positive electrode 2301 and the negative electrode 2302 are led out, so as to supply power to the load in the electronic device 20 to meet the energy required by the load during operation; the negative pole 2302 of the battery pack 230 is grounded.
The control module 21 is configured to: acquiring a state parameter value of each single battery cell in a charging state; and controlling the output power of each power conversion module based on each state parameter value so as to keep the state parameter value of each single battery cell within the same preset range. For example, based on each state parameter value, a target single battery cell to be balanced is determined from the N single battery cells; and re-determining the output power of the power conversion module corresponding to each target single-section battery cell based on the state parameter value of each single-section battery cell, so as to trigger the power conversion module corresponding to each target single-section battery cell, and charging the target single-section battery cell according to the re-determined output power, so that the state parameter value of each single-section battery cell is kept in the same preset range.
In general, the control module 21 has a connection link with each power conversion module, so that after the control module 21 re-determines the output power of the power conversion module corresponding to the corresponding target single-cell battery, the control module may transmit an indication signal to the power conversion module corresponding to the target single-cell battery through the connection link with the power conversion module corresponding to the target single-cell battery, so that the power conversion module corresponding to the target single-cell battery outputs power according to the power indicated by the indication signal.
It should be noted that, generally, the single battery cell is a lithium battery cell, and the lithium battery cell itself is composed of a chemical substance, so that in the process of charging each single battery cell, each single battery cell is affected by factors such as the surrounding environment, and the voltage consistency of each single battery cell is unstable, for example, the voltage of a certain two single battery cells is the same before 5 minutes, and the voltage difference of the two single battery cells is 0.1V after 5 minutes. Therefore, in order to keep the voltage or the electric quantity of each single battery cell as consistent as possible during the charging process of the battery pack 230, the control module 21 may periodically obtain the state parameter value of each single battery cell according to a preset time interval, so as to periodically adjust the output power of the power conversion module, so that the voltage of each single battery cell is always kept within the same preset range. The state parameter values may be voltage, current, electric quantity, and the like of the single cell.
Each of the power conversion modules is configured to: and charging the corresponding single battery cell according to the output power indicated by the control module 21. As can be appreciated, each of the power conversion modules may operate based on the output power indicated by the control module 21, so as to charge the corresponding single battery cell. After the control module 21 determines the target single-cell battery to be balanced and the output power of the power conversion module corresponding to the target single-cell battery again, the power conversion module corresponding to the target single-cell battery works according to the output power determined again by the control module 21, and the output power of the power conversion module corresponding to other non-target single-cell batteries is unchanged. In actual product development, the power conversion module may adopt a DC-DC converter (Direct Current-Direct Current converter), and different types of DC-DC converters may be selected according to actual requirements.
In the embodiment of the application, an electronic device, a charging method, and a storage medium are provided, where the electronic device includes N charging paths, and each charging path has a power conversion module and a single-cell electric core, so that when the voltage of a certain single-cell electric core needs to be equalized, the purpose of equalizing the voltage of the electric core can be achieved only by adjusting the output power of the power conversion module corresponding to the target single-cell electric core, and the voltage or the electric quantity of each single-cell electric core is kept within the same preset range, thereby avoiding the problem of increasing the charging duration caused by equalizing the voltage of the electric core by adding an equalizing circuit.
In an embodiment of the present application, a further electronic device is provided, and fig. 3A is a schematic structural diagram of a further electronic device in an embodiment of the present application, and as shown in fig. 3A, the electronic device 30 includes: the battery charging system comprises a control module 31, a load 32, and N charging paths, wherein each charging path is provided with a power conversion module (i.e., the power conversion module 1 to the power conversion module N shown in fig. 3A), a single cell (i.e., the cell B1 to the cell BN shown in fig. 3A), and a detection module (i.e., the detection module 1 to the detection module N shown in fig. 3A); n is an integer greater than or equal to 2; wherein the content of the first and second substances,
a battery pack 330 composed of N single battery cells, configured to: supplying power to the load 32; as shown in fig. 3A, the positive electrode of each single cell is connected to the negative electrode of the adjacent single cell, so that N single cells form a battery pack 330, the battery pack 330 has a positive electrode 3301 and a negative electrode 3302, and the positive electrode 3301 and the negative electrode 3302 of the battery pack 330 are correspondingly connected to the load 32, so as to supply power to the load 32; the negative electrode 3302 of the battery pack 330 is grounded.
Each of the detection modules is configured to: when each of the single battery cells is in a charging state, the state parameter value of the corresponding single battery cell is detected, and the state parameter value of the single battery cell is fed back to the control module 31. Generally, each of the detection modules may periodically detect the state parameter value of the single cell at a time interval indicated by the control module 31, and feed back the state parameter value of the single cell to the control module 31.
It can be understood that, the resistance of each single battery cell in a charging state is dynamically changed, which may be affected by factors such as temperature and the current electric quantity of the battery cell, so that directly measuring the state parameter value of each single battery cell is inaccurate, for example, directly measuring the voltage across each single battery cell or the current flowing into each single battery cell is inaccurate, in this embodiment of the present application, in order to more accurately measure the state parameter value of each single battery cell in the charging state, the state parameter value of each single battery cell may be correspondingly detected by the detection module, for example, in an embodiment corresponding to fig. 3B below, each single battery cell is connected in series with a current detection module, and the current flowing into the corresponding single battery cell is detected by the current detection module; alternatively, in the embodiment corresponding to fig. 3C, each single battery cell is connected in parallel with one voltage detection module, and the voltage at two ends of the corresponding single battery cell is detected by the voltage detection module.
The control module 31 is configured to: acquiring a state parameter value of each single battery cell in a charging state; if the state parameter values of any two of the N single battery cells are different, determining the single battery cell with the largest state parameter value from the N single battery cells; determining the single battery cells except the single battery cell with the largest state parameter value in the N single battery cells as target single battery cells to be balanced; and re-determining the output power of the power conversion module corresponding to each target single-section battery cell based on the state parameter value of each single-section battery cell, so as to trigger the power conversion module corresponding to each target single-section battery cell, and charging the target single-section battery cell according to the re-determined output power, so that the voltage or the electric quantity of each single-section battery cell is kept within the same preset range.
Here, when determining the target single cell to be equalized, for example, the electronic device 30 has 3 single cells (for convenience of description, referred to as cell 1, cell 2, and cell 3) connected in series, and when charging the electronic device 30, the control module 31 obtains that the voltage of the cell 1 is 3.6V, the voltage of the cell 2 is 3.7V, and the voltage of the cell 3 is 3.7V, where the voltage of the cell 1 is different from the voltage of the cell 2, and the voltages of the cell 2 and the cell 3 are the maximum (both are 3.7V), so that it may be determined that the cell 1 is the target single cell to be equalized. At this time, the output power of the power conversion module 1 corresponding to the battery cell 1 may be re-determined based on the voltage of the battery cell 2, that is, 3.7V, for example, the re-determined output power of the power conversion module 1 is (maximum voltage) 2 /R), where the maximum voltage refers to the voltage value of the cell having the largest voltage among all the cells, and R is the resistance value of the power conversion module 1, so that the output power of the power conversion module 1 newly determined here is (3.7) 2 and/R) watts. Of course, after the output power of the power conversion module corresponding to each target single-cell battery is re-determined, the charging mode of each target single-cell battery, that is, the output mode of the power conversion module corresponding to each target single-cell battery is not limited, and the power output may be performed in a constant current mode (that is, constant current charging) or a constant voltage mode (that is, constant voltage charging).
In other embodiments, the control module 31 may also determine, as the target single-cell battery to be balanced, a single-cell battery of which a state parameter value is smaller than a preset threshold value among the N single-cell batteries. Also in the case where the above-described electronic apparatus 30 has the battery cells 1 to 3,assuming that the preset threshold is 4.0V, then, the battery cells with the cell voltage smaller than 4.0V include the battery cell 1, the battery cell 2, and the battery cell 3, and therefore, the battery cell 1, the battery cell 2, and the battery cell 3 may be determined as the target single battery cell to be balanced. At this time, the output power corresponding to the power conversion module corresponding to the battery cells 1 to 3 may be re-determined based on the voltage 3.6V of the battery cell 1, the voltage 3.7V of the battery cell 2, and the voltage 3.7V of the battery cell 3, for example, the maximum voltage is determined to be 3.7V based on the voltage 3.6V of the battery cell 1, the voltage 3.7V of the battery cell 2, and the voltage 3.7V of the battery cell 3, and on this basis, the output power of the power conversion module corresponding to each battery cell is set to be (the maximum voltage + the preset voltage difference) 2 Where the maximum voltage refers to a voltage value of a cell with the maximum voltage among all the cells, and the preset voltage difference is, for example, 0.2V, then the output power of the power conversion module corresponding to each cell is (3.9) 2 and/R) watts. Similarly, after the output power of the power conversion module corresponding to each target single-cell is re-determined, the charging mode of each target single-cell is not limited, that is, the output mode of the power conversion module corresponding to each target single-cell is not limited, and the power output may be performed in a constant current mode (that is, constant current charging) or in a constant voltage mode (that is, constant voltage charging).
It should be further noted that, after the output power of the power conversion module corresponding to each target single-cell is re-determined, if the voltage or the electric quantity of each single-cell is kept within the same preset range, the control module 31 instructs each power conversion module 331 to charge the corresponding single-cell with the same output power, so that it can be ensured that the voltage or the electric quantity of each single-cell is kept within the same preset range in a short time in a subsequent charging process.
Each of the power conversion modules 331 is configured to: and charging the corresponding single battery cell according to the output power indicated by the control module 31.
An embodiment of the present application provides another electronic device, and fig. 3B is a schematic structural diagram of another electronic device according to an embodiment of the present application, and as shown in fig. 3B, the electronic device 30 includes: the battery charging system comprises a control module 41, a load 32, and N charging paths, wherein each charging path is provided with a power conversion module (i.e., the power conversion module 1 to the power conversion module N shown in fig. 3B), a single cell (i.e., the cell B1 to the cell BN shown in fig. 3B), and a current detection module (i.e., the current detection module 1 to the current detection module N shown in fig. 3B); n is an integer greater than or equal to 2; wherein the content of the first and second substances,
a battery pack 330 composed of N single battery cells, configured to: supplying power to the load 32; as shown in fig. 3B, the positive electrode of each single cell is connected to the negative electrode of the adjacent single cell, so that N single cells form the battery pack 330, the battery pack 330 has a positive electrode 3301 and a negative electrode 3302, and the positive electrode 3301 and the negative electrode 3302 of the battery pack 330 are correspondingly connected to the load 32, so as to supply power to the load 32; the negative electrode 3302 of the battery pack 330 is grounded.
Each current detection module is connected with a corresponding single battery cell in series; each of the streaming modules is configured to: and detecting a current value of the corresponding single battery cell in the charging state, and feeding back the current value as the state parameter value to the control module 31.
It can be understood that, the resistance of each of the single battery cells in the charging state is dynamically changed, which may be affected by factors such as temperature and the current electric quantity of the battery cell, so that the current flowing into the battery cell obtained by directly measuring the current is inaccurate, and therefore, in this embodiment of the application, in order to more accurately measure the state parameter value of each of the single battery cells in the charging state, the state parameter value of each of the single battery cells may be correspondingly detected by the detection module, for example, as shown in fig. 3B, each of the single battery cells is connected in series with a current detection module, and the current flowing into the corresponding single battery cell is detected by the current detection module.
The control module 31 is configured to: acquiring a current value of each single battery cell in a charging state; determining a target single battery cell to be balanced from the N single battery cells based on each current value; and re-determining the output power of the power conversion module corresponding to each target single-section battery cell based on the current value of each single-section battery cell, so as to trigger the power conversion module corresponding to each target single-section battery cell, and charging the target single-section battery cell according to the re-determined output power, so that the voltage or the electric quantity of each single-section battery cell is kept within the same preset range.
An embodiment of the present application provides another electronic device, and fig. 3C is a schematic structural diagram of another electronic device in an embodiment of the present application, and as shown in fig. 3C, the electronic device 30 includes: the battery pack comprises a control module 31, a load 32, and N charging paths, each of which has a power conversion module (i.e., the power conversion module 1 to the power conversion module N shown in fig. 3C), a single cell (i.e., the cell B1 to the cell BN shown in fig. 3C), and a voltage detection module (i.e., the voltage detection module 1 to the voltage detection module N shown in fig. 3C); n is an integer greater than or equal to 2; wherein the content of the first and second substances,
a battery pack 330 composed of N single battery cells, configured to: supplying power to the load 32; as shown in fig. 3C, the positive electrode of each single cell is connected to the negative electrode of the adjacent single cell, so that N single cells form the battery pack 330, the battery pack 330 has a positive electrode 3301 and a negative electrode 3302, and the positive electrode 3301 and the negative electrode 3302 of the battery pack 330 are correspondingly connected to the load 32, so as to supply power to the load 32; the negative electrode 3302 of the battery pack 330 is grounded.
Each voltage detection module is connected with a corresponding single battery cell in parallel; each pressure detection module is configured to: the voltage value of the corresponding single battery cell in the charging state is detected, and the voltage value is fed back to the control module 31 as the state parameter value.
It can be understood that, the resistance of each of the single battery cells in the charging state is dynamically changed, which may be affected by factors such as temperature and the current electric quantity of the battery cell, so that the voltage across the battery cell obtained by direct measurement is inaccurate, and in this embodiment, in order to more accurately measure the voltage value of each single battery cell in the charging state, each single battery cell is connected in parallel with one voltage detection module, and the voltage across the corresponding single battery cell is detected by the voltage detection module.
The control module 31 is configured to: acquiring a voltage value of each single battery cell in a charging state; determining a target single-section battery cell to be balanced from the N single-section battery cells based on each voltage value; and re-determining the output power of the power conversion module corresponding to each target single battery cell based on the voltage value of each single battery cell, so as to trigger the power conversion module corresponding to each target single battery cell, and charging the target single battery cell according to the re-determined output power, so that the voltage or the electric quantity of each single battery cell is kept in the same preset range.
An embodiment of the present application provides another electronic device, and fig. 4 is a schematic structural diagram of the another electronic device in the embodiment of the present application, and as shown in fig. 4, the electronic device 40 includes: the charging system comprises a control module 41, a load 42, a first charging path 43 and a second charging path 44, wherein each charging path is provided with a DC-DC converter (namely, a DC-DC converter 431 and a DC-DC converter 441 shown in FIG. 4) and a single battery cell (namely, a battery cell 432 and a battery cell 442 shown in FIG. 4), a voltage detection module (namely, a voltage detection module 433 and a voltage detection module 443 shown in FIG. 4); n is an integer greater than or equal to 2; wherein the content of the first and second substances,
battery pack 430 composed of battery cells 432 and 442, configured to: supplying power to the load 42; as shown in fig. 4, the positive electrode of the battery cell 432 is connected to the negative electrode of the battery cell 442, so that the two battery cells constitute the battery pack 430, the positive electrode of the battery cell 442 serves as the positive electrode 4301 of the battery pack 430, the negative electrode of the battery cell 432 serves as the negative electrode 4302 of the battery pack 430, and the positive electrode 4301 and the negative electrode 4302 of the battery pack 430 are correspondingly connected to the load 42, so as to supply power to the load 42; the negative pole 4302 of the battery pack 430 is grounded.
The voltage detection module 433 is connected in parallel with the battery cell 432, detects a voltage value at two ends of the battery cell 432 in a charging state, and feeds the voltage value back to the control module 41; the voltage detection module 443 is connected in parallel with the battery cell 442, detects a voltage value across the battery cell 442 in a charging state, and feeds back the voltage value to the control module 41.
The control module 41 is configured to: acquiring voltage values of the battery cells 432 and 442 in a charging state; determining a target single battery cell to be balanced from the battery cells 432 and 442 based on each voltage value; based on each voltage value, re-determining the output power of the DC-DC converter corresponding to the target single-cell, so as to trigger the DC-DC converter corresponding to the target single-cell, and charging the target single-cell according to the re-determined output power, so that the voltages or electric quantities of the cell 432 and the cell 442 are kept within a preset range.
For example, if the acquired voltage value of the battery cell 432 is 3.8V, the acquired voltage value of the battery cell 442 is 4.0V, and the voltage value of the battery cell 432 is smaller than the voltage value of the battery cell 442, it may be determined that a target single battery cell to be balanced is the battery cell 432, and at this time, the output power of the DC-DC converter 431 corresponding to the battery cell 432 may be increased, for example, the output power of the DC-DC converter 431 is controlled (3.8V) to control the output power of the DC-DC converter 431 2 Increase in/R) Watt to (4.0) 2 and/R) watts.
An embodiment of the present application provides another electronic device, and fig. 5 is a schematic structural diagram of another electronic device according to an embodiment of the present application, and as shown in fig. 5, the electronic device 50 includes: the charging system comprises a control module 51, a load 52, a first charging path 53 and a second charging path 54, wherein each charging path is provided with a DC-DC converter (namely, a DC-DC converter 531 and a DC-DC converter 541 shown in FIG. 5) and a single battery cell (namely, a battery cell 532 and a battery cell 542 shown in FIG. 5), and a current detection module (namely, a current detection module 533 and a current detection module 543 shown in FIG. 5); n is an integer greater than or equal to 2; wherein the content of the first and second substances,
battery pack 530 composed of battery cells 532 and 542, configured to: supplying power to the load 52; as shown in fig. 5, the positive electrode of the battery cell 532 is connected to the negative electrode of the battery cell 542, so that the two battery cells form the battery pack 530, the positive electrode of the battery cell 542 serves as the positive electrode 5301 of the battery pack 530, the negative electrode of the battery cell 532 serves as the negative electrode 5302 of the battery pack 530, and the positive electrode 5301 and the negative electrode 5302 of the battery pack 530 are correspondingly connected to the load 52, so as to supply power to the load 52; the negative electrode 5302 of the battery pack 530 is grounded.
The current detection module 533 is connected in series with the battery cell 532, detects a current flowing into the battery cell 532 when the battery cell is in a charging state, and feeds a current value of the current back to the control module 51; the current detection module 543 is connected in series with the battery cell 542, detects a current flowing into the battery cell 542 in a charging state, and feeds a current value of the current back to the control module 51.
The control module 51 is configured to: acquiring current values of the battery cell 532 and the battery cell 542 in a charging state; determining a target single-section battery cell to be balanced from the battery cells 532 and 542 based on each current value; based on each current value, the output power of the DC-DC converter corresponding to the target single-cell is re-determined, so as to trigger the DC-DC converter corresponding to the target single-cell, and the target single-cell is charged according to the re-determined output power, so that the voltages or electric quantities of the cell 532 and the cell 542 are kept within a preset range.
For example, if the obtained current value of the battery cell 532 is 1.8 amperes (Ampere, a), the obtained current value of the battery cell 542 is 2.0A, and the current value of the battery cell 532 is smaller than the current value of the battery cell 542, it may be determined that the electric quantity of the battery cell 532 is smaller than the electric quantity of the battery cell 542, and therefore, the target single battery cell to be balanced is the battery cell 532, at this time, the output power of the DC-DC converter 531 corresponding to the battery cell 532 may be increased, for example, the output power of the DC-DC converter 531 is controlled so as to obtain (1.8) 2 * R) Watt increase to (2.0) 2 * R) watts.
In recent years, in order to increase the charging speed of a mobile terminal (i.e., the electronic device), a battery composed of a plurality of battery cells is increasingly used for the mobile terminal. Taking a mobile phone as an example, when a battery of the mobile phone includes a battery cell, when the mobile phone is charged, a voltage across the battery cell is generally between 3.0V and 4.35V. When the battery of the mobile phone comprises two battery cores connected in series, the total voltage of the two battery cores connected in series is 6.0V to 8.7V. Compared with a single battery cell, the charging speed is equivalent, and the charging current required by the multiple battery cells is about 1/N of the charging current required by the single battery cell (wherein N is the number of the battery cells connected in series in the mobile terminal). In other words, on the premise of ensuring the same charging speed (i.e., the same charging power), the scheme of using multiple cell batteries can reduce the magnitude of the charging current, thereby reducing the heat productivity of the mobile terminal in the charging process. On the other hand, compared with a mobile terminal with only one battery cell, when the mobile terminal is charged, the mobile terminal with the multiple battery cells has higher charging voltage and higher charging speed, and can complete charging in a shorter time.
At present, in a mobile terminal having multiple battery cells, a battery pack formed by multiple battery cells is generally charged, that is, all battery cells are charged simultaneously, and during the charging process, the problem of voltage imbalance of each battery cell needs to be removed by a balancing circuit (including passive balancing and active balancing) to keep the voltage of each battery cell consistent, however, the balancing circuit needs to consume the energy of the battery cell during the working process, thereby affecting the charging duration of the battery pack. Based on this, in the embodiment of the present application, a mobile terminal having two charging paths or more than two charging paths is provided, when the mobile terminal is charged, corresponding battery cells are respectively charged through each charging path, and in a charging process, a charging voltage of each charging path may be controlled according to a voltage of each battery cell fed back, that is, an output power of a power conversion module on each charging path is controlled, so that it is ensured that the voltage and the electric quantity of each battery cell are consistent, thereby canceling an equalization circuit, and shortening a charging time of the mobile terminal.
Based on the foregoing embodiments, an embodiment of the present application provides a charging method, where the charging method is applied to an electronic device in an embodiment corresponding to fig. 2 to 5, and fig. 6 is a schematic view of an implementation flow of the charging method in the embodiment of the present application, and as shown in fig. 6, the method includes steps S601 to S604:
s601, obtaining state parameter values of N single battery cells in a charging state, wherein the N single battery cells are respectively arranged on N charging paths, and N is an integer greater than or equal to 2;
s602, determining the output power of each power conversion module based on each state parameter value, wherein each single battery cell is connected with one power conversion module;
and S603, controlling the power conversion module corresponding to each single battery cell to output corresponding output power to charge the corresponding single battery cell, so that the state parameter value of each single battery cell is kept in the same preset range.
In other embodiments, for step S602, the determining the output power of each power conversion module based on each of the state parameter values includes steps S6021 to S6022:
s6021, determining a target single battery cell to be balanced from the N single battery cells based on each state parameter value;
and S6022, re-determining the output power of the power conversion module corresponding to each target single-cell electric core based on the state parameter value of each single-cell electric core, so that the power conversion module corresponding to each target single-cell electric core charges the corresponding target single-cell electric core according to the output power re-determined by the control module, thereby keeping the state parameter value of each single-cell electric core within the same preset range.
In other embodiments, for step S6021, the determining, from the N single-cell cells, a target single-cell to be equalized based on each of the state parameter values includes:
if the state parameter values of any two single battery cells in the N single battery cells are different, determining the single battery cell with the largest state parameter value from the N single battery cells; determining the single battery cells except the single battery cell with the largest state parameter value in the N single battery cells as the target single battery cell; alternatively, the first and second electrodes may be,
and determining the single battery cell with the state parameter value smaller than a preset threshold value in the N single battery cells as the target single battery cell.
In other embodiments, the method further comprises: when each single-section battery cell is in a charging state, a detection module is used for detecting the state parameter value of the corresponding single-section battery cell and feeding the state parameter value of the single-section battery cell back to the control module, and each detection module is arranged on the corresponding charging passage.
In other embodiments, the detecting, by the detecting module, the state parameter value of the corresponding single battery cell includes: detecting the current value of the corresponding single battery cell through a current detection module connected with each single battery cell in series; or, the voltage value of the corresponding single battery cell is detected through a voltage detection module connected with each single battery cell in parallel.
In other embodiments, the method further comprises: after the output power of the power conversion module corresponding to each target single-battery cell is re-determined, if the state parameter value of each single-battery cell is kept in the same preset range, each power conversion module is controlled to charge the corresponding single-battery cell with the same output power.
The above description of the apparatus embodiments, similar to the above description of the method embodiments, has similar beneficial effects as the method embodiments. For technical details not disclosed in the embodiments of the apparatus of the present application, reference is made to the description of the embodiments of the method of the present application for understanding.
It should be noted that, in the embodiment of the present application, if the charging method is implemented in the form of a software functional module and sold or used as a standalone product, the charging method may also be stored in a computer readable storage medium. Based on such understanding, the technical solutions of the embodiments of the present application may be essentially implemented or a part contributing to the related art may be embodied in the form of a software product stored in a storage medium, and including a plurality of instructions for enabling an electronic device (which may be a mobile phone, a tablet computer, a desktop computer, a personal digital assistant, a navigator, a digital phone, a video phone, a television, a sensing device, etc.) to execute all or part of the methods described in the embodiments of the present application. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read Only Memory (ROM), a magnetic disk, or an optical disk. Thus, embodiments of the present application are not limited to any specific combination of hardware and software.
Correspondingly, an embodiment of the present application provides an electronic device, fig. 7 is a schematic diagram of a hardware entity of the electronic device according to the embodiment of the present application, and as shown in fig. 7, the hardware entity of the electronic device 700 includes: comprising a memory 701 and a processor 702, said memory 701 storing a computer program operable on the processor 702, said processor 702 implementing the steps in the power supply method provided in the above embodiments when executing said program.
The Memory 701 is configured to store instructions and applications executable by the processor 702, and may also cache data to be processed or already processed by the processor 702 and modules in the electronic device 700 (e.g., image data, audio data, voice communication data, and video communication data), which may be implemented by a FLASH Memory (FLASH) or a Random Access Memory (RAM).
Correspondingly, the embodiment of the present application provides a computer readable storage medium, on which a computer program is stored, and the computer program, when executed by a processor, implements the steps in the charging method provided in the above embodiment.
Here, it should be noted that: the above description of the storage medium and device embodiments is similar to the description of the method embodiments above, with similar advantageous effects as the method embodiments. For technical details not disclosed in the embodiments of the storage medium and apparatus of the present application, reference is made to the description of the embodiments of the method of the present application for understanding.
It should be appreciated that reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure or characteristic described in connection with the embodiment is included in at least one embodiment of the present application. Thus, the appearances of the phrases "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. It should be understood that, in the various embodiments of the present application, the sequence numbers of the above-mentioned processes do not mean the execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present application. The above-mentioned serial numbers of the embodiments of the present application are merely for description and do not represent the merits of the embodiments.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising a … …" does not exclude the presence of another identical element in a process, method, article, or apparatus that comprises the element.
In the several embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. The above-described device embodiments are merely illustrative, for example, the division of the unit is only a logical functional division, and there may be other division ways in actual implementation, such as: multiple units or components may be combined, or may be integrated into another system, or some features may be omitted, or not implemented. In addition, the coupling, direct coupling or communication connection between the components shown or discussed may be through some interfaces, and the indirect coupling or communication connection between the devices or units may be electrical, mechanical or other forms.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units; can be located in one place or distributed on a plurality of network units; some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, all functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may be separately regarded as one unit, or two or more units may be integrated into one unit; the integrated unit can be realized in a form of hardware, or in a form of hardware plus a software functional unit.
Those of ordinary skill in the art will understand that: all or part of the steps for realizing the method embodiments can be completed by hardware related to program instructions, the program can be stored in a computer readable storage medium, and the program executes the steps comprising the method embodiments when executed; and the aforementioned storage medium includes: various media that can store program codes, such as a removable Memory device, a Read Only Memory (ROM), a magnetic disk, or an optical disk.
Alternatively, the integrated units described above in the present application may be stored in a computer-readable storage medium if they are implemented in the form of software functional modules and sold or used as independent products. Based on such understanding, the technical solutions of the embodiments of the present application may be essentially or partially embodied in the form of a software product stored in a storage medium, and including instructions for enabling a terminal (which may be a mobile phone, a tablet computer, a desktop computer, a personal digital assistant, a navigator, a digital phone, a video phone, a television, a sensing device, etc.) to execute all or part of the methods described in the embodiments of the present application. And the aforementioned storage medium includes: a removable storage device, a ROM, a magnetic or optical disk, or other various media that can store program code.
The above description is only for the embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (8)
1. An electronic device, characterized in that the electronic device comprises: the system comprises N charging paths and a control module, wherein each charging path is provided with a power conversion module, a single-section battery cell and a detection module; n is an integer greater than or equal to 2; wherein the content of the first and second substances,
the control module is configured to: acquiring a state parameter value of each single battery cell in a charging state;
controlling the output power of each power conversion module based on each state parameter value so as to keep the state parameter value of each single battery cell within the same preset range;
each of the power conversion modules is configured to: charging the corresponding single battery cell according to the output power indicated by the control module;
each of the detection modules is configured to: when each single battery cell is in a charging state, detecting a state parameter value of the corresponding single battery cell, and feeding back the state parameter value of the single battery cell to the control module;
the control module is further configured to: determining a target single-section battery cell to be balanced from the N single-section battery cells based on each state parameter value; re-determining the output power of the power conversion module corresponding to each target single battery cell based on the state parameter value of each single battery cell, so that the power conversion module corresponding to each target single battery cell charges the corresponding target single battery cell according to the output power re-determined by the control module, and the state parameter value of each single battery cell is kept in the same preset range; the step of re-determining the output power of the power conversion module corresponding to each target single-cell battery cell is determined according to the voltage value of the battery cell with the largest voltage in all the battery cells and a preset voltage difference.
2. The electronic device of claim 1, wherein the control module is configured to:
if the state parameter values of any two single battery cells in the N single battery cells are different, determining the single battery cell with the largest state parameter value from the N single battery cells; determining the single battery cells except the single battery cell with the largest state parameter value in the N single battery cells as the target single battery cell; alternatively, the first and second electrodes may be,
and determining the single battery cells with the state parameter values smaller than a preset threshold value in the N single battery cells as the target single battery cells.
3. The electronic device of claim 1 or 2, wherein the state parameter values of the single battery cells include current values, and correspondingly, each of the detection modules is a current detection module connected in series with the corresponding single battery cell;
each of the streaming modules is configured to: and feeding back the current value of the corresponding single battery cell in the charging state to the control module as a state parameter value.
4. The electronic device of claim 1 or 2, wherein the state parameter values of the single battery cells include voltage values, and correspondingly, each of the detection modules is a voltage detection module connected in parallel with the corresponding single battery cell;
each pressure detection module is configured to: and feeding back the voltage value of the corresponding single battery cell in the charging state to the control module as a state parameter value.
5. The electronic device of any of claims 1-2, wherein the control module is further configured to: after the output power of the power conversion module corresponding to each target single-battery cell is re-determined, if the state parameter value of each single-battery cell is kept in the same preset range, each power conversion module is controlled to charge the corresponding single-battery cell with the same output power.
6. A method of charging, the method comprising:
acquiring state parameter values of N single-section battery cells in a charging state, wherein the N single-section battery cells are respectively arranged on N charging paths, and N is an integer greater than or equal to 2; wherein, the state parameter value when obtaining N single section electricity core and being in the charged state includes: when each single battery cell is in a charging state, detecting a state parameter value of the corresponding single battery cell;
determining the output power of each power conversion module based on each state parameter value, wherein each single battery cell is connected with one power conversion module;
determining a target single-section battery cell to be balanced from the N single-section battery cells based on each state parameter value; re-determining the output power of the power conversion module corresponding to each target single battery cell based on the state parameter value of each single battery cell, so that the power conversion module corresponding to each target single battery cell charges the corresponding target single battery cell according to the output power re-determined by the control module, and the state parameter value of each single battery cell is kept in the same preset range; the step of re-determining the output power of the power conversion module corresponding to each target single-cell battery cell is determined according to the voltage value of the battery cell with the maximum voltage in all the battery cells and a preset voltage difference;
and controlling the power conversion module corresponding to each single battery cell to output corresponding output power to charge the corresponding single battery cell so as to keep the state parameter value of each single battery cell within the same preset range.
7. The method of claim 6, wherein determining the output power of each power conversion module based on each of the state parameter values comprises:
determining a target single-section battery cell to be balanced from the N single-section battery cells based on each state parameter value;
and re-determining the output power of the power conversion module corresponding to each target single battery cell based on the state parameter value of each single battery cell.
8. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the charging method according to claim 6 or 7.
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| US7489106B1 (en) * | 2006-03-31 | 2009-02-10 | Victor Tikhonov | Battery optimization system and method of use |
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