CN117955187A - Charging and discharging circuit, electronic device, control method, and readable storage medium - Google Patents
Charging and discharging circuit, electronic device, control method, and readable storage medium Download PDFInfo
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- CN117955187A CN117955187A CN202211275906.5A CN202211275906A CN117955187A CN 117955187 A CN117955187 A CN 117955187A CN 202211275906 A CN202211275906 A CN 202211275906A CN 117955187 A CN117955187 A CN 117955187A
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- 238000000034 method Methods 0.000 title claims abstract description 28
- 238000007599 discharging Methods 0.000 title description 8
- 230000002457 bidirectional effect Effects 0.000 claims abstract description 52
- 238000004590 computer program Methods 0.000 claims description 7
- 230000006870 function Effects 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000009977 dual effect Effects 0.000 description 3
- HEZMWWAKWCSUCB-PHDIDXHHSA-N (3R,4R)-3,4-dihydroxycyclohexa-1,5-diene-1-carboxylic acid Chemical compound O[C@@H]1C=CC(C(O)=O)=C[C@H]1O HEZMWWAKWCSUCB-PHDIDXHHSA-N 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000013307 optical fiber 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
- H02J7/0014—Circuits for equalisation of charge between batteries
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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
- H02J7/0068—Battery or charger load switching, e.g. concurrent charging and load supply
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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
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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
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Secondary Cells (AREA)
Abstract
The application discloses a charge-discharge circuit, electronic equipment, a control method and a computer readable storage medium. The battery cell module comprises a first battery cell and a second battery cell which are arranged in series, and the capacities of the first battery cell and the second battery cell are unequal. The bidirectional voltage converter comprises a first end and a second end, wherein the first end is connected with the buck charging chip, and the first battery cell is respectively connected with the second end and the second battery cell. The equalization circuit comprises a first connecting end and a second connecting end, the first connecting end is connected with the first end, the second connecting end is connected between the first battery cell and the second battery cell, and the equalization circuit is used for realizing active equalization of the battery cells in the battery cell module. According to the application, through the cooperation of the bidirectional voltage converter and the simple equalization circuit, active equalization is realized when the cells with unequal capacities are connected in series, and an equalization module is not required to be additionally arranged, so that the cost and the loss are reduced.
Description
Technical Field
The present application relates to the field of consumer electronics, and more particularly, to a charge-discharge circuit, an electronic device, a control method, and a computer-readable storage medium.
Background
In the related art, a folded mobile phone may include two battery cells arranged in series, and the capacities of the two battery cells are unequal, so that in order to facilitate charging and discharging, an equalization module needs to be additionally arranged to adjust the voltages of the two battery cells, so that the cost is high and the loss is high.
Disclosure of Invention
The embodiment of the application provides a charge and discharge circuit, an electronic device, a control method and a computer readable storage medium.
The embodiment of the application provides a charge-discharge circuit which comprises a battery cell module, a step-down charge chip, a bidirectional voltage converter and an equalizing circuit. The battery cell module comprises a first battery cell and a second battery cell which are arranged in series, and the capacities of the first battery cell and the second battery cell are unequal. The bidirectional voltage converter comprises a first end and a second end, wherein the first end is connected with the step-down charging chip, and the first battery cell is respectively connected with the second end and the second battery cell. The bidirectional voltage converter can double the voltage of the step-down charging chip and output the double voltage to the battery cell module for charging, and/or the bidirectional voltage converter can reduce the voltage of the battery cell module by half and output the half voltage to the step-down charging chip for supplying power to the electric element. The equalization circuit comprises a first connecting end and a second connecting end, the first connecting end is connected with the first end, the second connecting end is connected between the first electric core and the second electric core, under the condition that the voltage of the second electric core is larger than that of the first end, current is output from the second electric core to the first end through the equalization circuit and then is output to the electric core module through the bidirectional voltage converter, so that energy of the second electric core is transferred to the first electric core, under the condition that the voltage of the second electric core is smaller than that of the first end, current is output from the electric core module to the first end through the bidirectional voltage converter and then is output to the second electric core through the equalization circuit, and energy of the first electric core is transferred to the second electric core.
The embodiment of the application provides electronic equipment, which comprises the charging and discharging circuit and the power utilization element in any one of the embodiments, wherein the charging and discharging circuit is used for supplying power to the power utilization element.
The embodiment of the application provides a control method, which is used for a charge-discharge circuit, wherein the charge-discharge circuit comprises a battery cell module, a buck charge chip, a bidirectional voltage converter and an equalization circuit, the battery cell module comprises a first battery cell and a second battery cell which are arranged in series, and the capacities of the first battery cell and the second battery cell are unequal; the bidirectional voltage converter comprises a first end and a second end, wherein the first end is connected with the step-down charging chip, and the first battery cell is respectively connected with the second end and the second battery cell; the bidirectional voltage converter can increase the voltage of the step-down charging chip and output the voltage to the battery cell module for charging, and/or the bidirectional voltage converter can reduce the voltage of the battery cell module and output the voltage to the step-down charging chip for supplying power to the electric element; the equalization circuit comprises a first connecting end and a second connecting end, the first connecting end is connected with the first end, and the second connecting end is connected between the first battery cell and the second battery cell; the control method comprises the following steps: when the voltage of the second battery cell is larger than that of the first end, the first end is controlled to be an input end, the second end is controlled to be an output end, current is output from the second battery cell to the first end through the equalizing circuit, and then the current is output to the battery cell module through the bidirectional voltage converter, so that energy of the second battery cell is transferred to the first battery cell; and under the condition that the voltage of the second battery cell is smaller than that of the first end, controlling the second end to be an input end, wherein the first end is an output end, and current is output from the battery cell module to the first end through the bidirectional voltage converter and then is output to the second battery cell through the equalizing circuit so as to realize energy transfer of the first battery cell to the second battery cell.
An embodiment of the present application provides an electronic device including one or more processors and a memory storing a computer program that, when executed by the processors, implements the steps of the control method in the above embodiment.
An embodiment of the present application provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the steps of the control method in the above embodiment.
In the charge and discharge circuit, the electronic equipment, the control method and the computer readable storage medium, the active equalization when the battery cores with different capacities are connected in series is realized through the cooperation of the bidirectional voltage converter and the simple equalization circuit, and an equalization module is not required to be additionally arranged, so that the cost and the loss are reduced.
Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the application.
Drawings
The foregoing and/or additional aspects and advantages of the application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, in which:
FIG. 1 is a schematic diagram of an electronic device according to an embodiment of the application;
FIG. 2 is a schematic diagram of an electronic device according to an embodiment of the application;
fig. 3 is a schematic diagram of a control method according to an embodiment of the present application.
Detailed Description
Embodiments of the present application are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present application and should not be construed as limiting the application.
In the related art, the folded mobile phone may include two battery cells arranged in series, and for models with unequal capacities of the two battery cells, a parallel charging scheme is adopted. However, in the parallel charging scheme, due to the current distribution of the dual battery cells, the voltages of the dual battery cells are difficult to be equal in real time, so that the dual battery cells are fully charged simultaneously, and the overall charging time is increased. For the model with equal capacity of the double battery cells, a serial charging scheme can be adopted, and compared with a parallel charging scheme, the method can realize the nearly real-time equal voltage of the double battery cells, and the charging time is shorter. However, the whole structure requires the same capacity of the double battery cells, so that the stacking flexibility is poor. For the series connection of the battery cores with different capacities, the active equalization module is required to distribute the current of the double battery cores in the charge and discharge process so as to ensure that the voltages of the double battery cores are equal in real time. And when the equalization module is added, the cost is high. And the equalization module needs to control equalization current, and inductance type DCDC topology is needed, so that the efficiency is lower, and only about 90% is usually needed. The single cell voltage 4V, the loss power reached p= 4*2 x (1-90%) 1000=800 mW, calculated as the equalized 2A current.
Referring to fig. 1, an embodiment of the present application provides a charge-discharge circuit 100, where the charge-discharge circuit 100 includes a battery cell module 10, a buck charging chip 20, a bidirectional voltage converter 30, and an equalizing circuit 40. The battery cell module 10 includes a first battery cell 11 and a second battery cell 12 that are arranged in series, and capacities of the first battery cell 11 and the second battery cell 12 are unequal. The bidirectional voltage converter 30 includes a first end 31 and a second end 32, the first end 31 is connected to the buck charging chip 20, and the first battery cell 11 is connected to the second end 32 and the second battery cell 12 respectively. The bi-directional voltage converter 30 can double the voltage of the buck charging chip 20 and output it to the cell module 10 for charging, and/or the bi-directional voltage converter 30 can half-reduce the voltage of the cell module 10 and output it to the buck charging chip 20 for powering the powered element 200. The equalizing circuit 40 includes a first connection end 41 and a second connection end 42, the first connection end 41 is connected to the first end 31, the second connection end 42 is connected between the first cell 11 and the second cell 12, when the voltage of the second cell 12 is greater than that of the first end 31, current is output from the second cell 12 to the first end 31 through the equalizing circuit 40 and then output to the cell module 10 through the bidirectional voltage converter 30, so as to realize energy transfer of the second cell 12 to the first cell 11, and when the voltage of the second cell 12 is less than that of the first end 31, current is output from the cell module 10 to the first end 31 through the bidirectional voltage converter 30 and then output to the second cell 12 through the equalizing circuit 40, so as to realize energy transfer of the first cell 11 to the second cell 12.
Specifically, the bidirectional voltage converter 30 is located between the cell module 10 and the buck charging chip 20 in the charge-discharge circuit 100, and has a bidirectional voltage conversion function, and can be used for power conversion. An equalizing line 40 is added between the midpoints of the first cell 11 and the second cell 12 with unequal capacities and the first end 31 of the bidirectional voltage converter 30, and the equalizing line 40 is used for equalizing the voltage of the first cell 11 and the voltage of the second cell 12 in the cell module 10. Because the bidirectional voltage converter 30 performs voltage conversion at 1:2 or 2:1, the voltage at the first end 31 is approximately equal to the voltage of the first battery cell 11 plus half the voltage of the second battery cell 12, when the voltage of the second battery cell 12 is higher than the voltage at the first end 31, it is indicated that the voltage of the second battery cell 12 is higher than the voltage of the first battery cell 11, and at this time, current is output from the second battery cell 12 to the first end 31 through the equalizing circuit 40, and the voltage of the first battery cell 11 is given by the bidirectional voltage converter 30, so as to realize energy transfer from the second battery cell 12 to the first battery cell 11; when the voltage of the second battery 12 is lower than the voltage of the first terminal 31, it is indicated that the voltage of the second battery 12 is lower than the voltage of the first battery 11, and at this time, the current is output from the first terminal 31 to the second battery 12 through the equalizing circuit 40, and the energy of the first terminal 31 is derived from the second terminal 32, that is, the voltage of the second battery 12 is applied to the first battery 11, so as to realize the energy transfer from the first battery 11 to the second battery 12. The equalization function of the series double battery cells can be realized.
Thus, through the cooperation of the bidirectional voltage converter 30 and the simple equalization circuit 40, active equalization is realized when the cells with unequal capacities are connected in series, and an equalization module is not required to be additionally arranged, so that the cost and the loss are reduced.
In some embodiments, where half of the voltage at the second terminal 32 is greater than the voltage at the first terminal 31, the second terminal 32 is an input terminal, the first terminal 31 is an output terminal, and the second terminal 32 discharges toward the first terminal 31. Specifically, referring to fig. 1, V1X is used as the first end, V2X is used as the second end, when half of the voltage V2X is greater than V1X, V2X is used as the input end, V1X is used as the output end, and the bidirectional voltage converter 30 half-presses the dual-cell voltage 2:1 from the cell module 10 to discharge the power consumption element 200. In this way, the operation of discharging the power consumption element 200 can be achieved.
In some embodiments, where the voltage at the first end 31 is greater than half the voltage at the second end 32, the first end 31 is an input end, the second end 32 is an output end, and the first end 31 discharges toward the second end 32. Specifically, referring to fig. 1, when half of the voltage V2X is smaller than V1X, V1X is the input end and V2X is the output end, and the bidirectional voltage converter 30 charges the battery module 10 after 1:2 times of the single-battery voltage output by the buck charging chip 20. In this manner, a universal operation of the cell module 10 can be achieved.
In some embodiments, the equalization line 40 further includes a current limiting circuit for reducing the current of the equalization line 40. Specifically, since the bidirectional voltage converter 30 performs voltage conversion at 1:2 or 2:1, the voltage V1X is approximately equal to the voltage of the first battery cell 11 plus half the voltage of the second battery cell 12, and when the voltage of the second battery cell 12 is higher than the voltage V1X, it is indicated that the voltage of the second battery cell 12 is higher than the voltage of the first battery cell 11, and at this time, the current is output from the second battery cell 12 to the V1X through the current limiting circuit, and the voltage of the first battery cell 11 is given to the second battery cell 12 through the bidirectional voltage converter 30, so as to realize energy transfer from the second battery cell 12 to the first battery cell 11; when the voltage of the second battery cell 12 is lower than the voltage of V1X, it is indicated that the voltage of the second battery cell 12 is lower than the voltage of the first battery cell 11, and at this time, the current is output from V1X to the second battery cell 12 through the current limiting circuit, and the energy of V1X is derived from V2X, that is, the voltage of the first battery cell 11 and the second battery cell 12 is added, so as to realize energy transfer from the first battery cell 11 to the second battery cell 12. The equalization function of the series double battery cells can be realized. For example, the equalizing current is 2A, the current limiting circuit 50mR, and the loss power is only p=2×2×50=200 mW, so that higher efficiency can be achieved. Thus, adding a current limiting circuit can limit the equalization current.
In some embodiments, the equalizing circuit 40 further includes a switching circuit for being turned on when the voltage difference between the voltage of the first connection terminal 41 and the voltage of the second connection terminal 42 is within a preset voltage difference range, and turned off when the voltage difference is outside the preset voltage difference range. Specifically, when the voltage of the second cell 12 and the voltage of V1X are detected within a suitable voltage difference range, the switch is turned on again to ensure that the balance current is within a controllable range.
In some embodiments, the charging and discharging circuit 100 includes a charging interface 50, and when charging is performed in the first charging mode, the charging interface 50 outputs to the battery module 10 through the buck charging chip 20 and the bidirectional voltage converter 30 for charging. Specifically, the charging interface 50 is used for taking power from an external power supply device for power consumption in the charging and discharging circuit 100, and the first charging mode is that when half of the voltage V2X is less than V1X, V1X is an input end, V2X is an output end, and the bidirectional voltage converter 30 charges the battery module 10 after 1:2 times of the single-battery voltage output by the step-down charging chip 20.
In some embodiments, in the case of charging in the second charging mode, the charging interface 50 outputs to the battery module 10 for charging through the fast charging circuit 60, and the charging speed in the second charging mode is greater than the charging speed in the first charging mode. In one embodiment, the first charging mode may be a normal charging mode and the second charging mode may be a rapid charging mode. Specifically, in the first charging mode, the current flows from the charging interface 50 through the Power management chip 70 (PMIC, power MANAGEMENT IC) of the mobile phone, through the bidirectional voltage converter 30, and finally into the cell module 10; in the second charging mode, the current flows from the charging interface 50 directly to the battery module 10 through the fast charging circuit 60. The fast charging circuit 60 may include an electronic switch, which is not specifically limited herein.
Referring to fig. 2, an embodiment of the present application provides an electronic device 1000, where the electronic device 1000 includes the charge-discharge circuit 100 and the power consumption element 200 in any of the above embodiments, and the charge-discharge circuit 100 is used to supply power to the power consumption element 200. In particular, the electronic device 1000 may include a smart phone, a tablet computer, a smart watch, a smart bracelet, etc., which are not particularly limited herein. The electronic device 1000 according to the embodiment of the present application is illustrated by using a smart phone as an example, and is not to be construed as limiting the present application. The power consumption element 200 is a component in the electronic device 1000, and may be an operating system or the like, for example.
The embodiment of the application provides a control method, which is used for a charge-discharge circuit 100, wherein the charge-discharge circuit 100 comprises a battery cell module 10, a buck charge chip 20, a bidirectional voltage converter 30 and an equalizing circuit 40, the battery cell module 10 comprises a first battery cell 11 and a second battery cell 12 which are arranged in series, and the capacities of the first battery cell 11 and the second battery cell 12 are unequal; the bidirectional voltage converter 30 comprises a first end 31 and a second end 32, the first end 31 is connected with the buck charging chip 20, and the first battery cell 11 is respectively connected with the second end 32 and the second battery cell 12; the bidirectional voltage converter 30 can double the voltage of the buck charging chip 20 and output the voltage to the battery cell module 10 for charging, and/or the bidirectional voltage converter 30 can reduce the voltage of the battery cell module 10 by half and output the voltage to the buck charging chip 20 for supplying power to the power consumption element 200; the equalizing circuit 40 includes a first connection end 41 and a second connection end 42, the first connection end 41 is connected to the first end 31, and the second connection end 42 is connected between the first battery cell 11 and the second battery cell 12; referring to fig. 3, the control method includes:
01: when the voltage of the second cell 12 is greater than the voltage of the first end 31, the first end 31 is controlled to be an input end, the second end 32 is controlled to be an output end, and current is output from the second cell 12 to the first end 31 through the equalizing circuit 40 and then to the cell module 10 through the bidirectional voltage converter 30, so that energy of the second cell 12 is transferred to the first cell 11;
02: in the case that the voltage of the second battery cell 12 is smaller than the voltage of the first terminal 31, the second terminal 32 is controlled to be an input terminal, the first terminal 31 is controlled to be an output terminal, and the current is output from the battery cell module 10 to the first terminal 31 through the bidirectional voltage converter 30 and then output to the second battery cell 12 through the equalizing circuit 40, so as to realize the energy transfer of the first battery cell 11 into the second battery cell 12.
In step 01, when the voltage of the second cell 12 is greater than the voltage of the first terminal 31, the first terminal 31 is controlled to be an input terminal, the second terminal 32 is controlled to be an output terminal, and the current is output from the second cell 12 to the first terminal 31 through the equalizing circuit 40 and then output to the cell module 10 through the bidirectional voltage converter 30, so as to realize energy transfer of the second cell 12 into the first cell 11. Specifically, current is output from the first cell 12 to the first terminal through a current limiting/switching circuit. In this way, the energy transfer from the second cell 12 to the first cell 11 is achieved by the voltage provided to the first cell 11 by the bi-directional voltage converter 30.
In step 02, when the voltage of the second battery cell 12 is smaller than the voltage of the first terminal 31, the second terminal 32 is controlled to be an input terminal, the first terminal 31 is an output terminal, and the current is output from the battery cell module 10 to the first terminal 31 through the bidirectional voltage converter 30 and then output to the second battery cell 12 through the equalizing circuit 40, so as to realize energy transfer of the first battery cell 11 into the second battery cell 12. Specifically, the current is output from the first end 31 to the second battery cell 12 through the current limiting/switching circuit, and the energy of the first end 31 is derived from the second end 32, that is, the voltage of the first battery cell 11 plus the voltage of the second battery cell 12, so as to realize the energy transfer from the first battery cell 11 to the second battery cell 12.
The above explanation of the charge-discharge circuit 100 is applicable to the control method, and will not be repeated here.
Referring again to fig. 2, an electronic device 1000 is provided according to an embodiment of the present application, where the electronic device includes one or more processors 300 and a memory 400, and the memory 400 stores a computer program, and when the computer program is executed by the processors, the steps of the control method in the above embodiment are implemented.
The embodiment of the present application provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the steps of the control method in the above embodiment. In particular, a computer readable medium can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (control method) with one or more wires, a portable computer cartridge (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM).
In the charge and discharge circuit 100, the electronic device 1000, the control method and the computer readable storage medium according to the embodiments of the present application, active equalization is achieved when the battery cells with unequal capacities are connected in series by matching the bidirectional voltage converter 30 with the simple equalization line 40, and an additional equalization module is not required, thereby reducing cost and loss. In particular, the electronic device 1000 may include a smart phone, a tablet computer, a smart watch, a smart bracelet, etc., which are not particularly limited herein. The electronic device 1000 according to the embodiment of the present application is illustrated by using a smart phone as an example, and is not to be construed as limiting the present application. The power consumption element 200 is a component in the electronic device 1000.
In the charge and discharge circuit 100, the electronic device 1000, the control method and the computer readable storage medium according to the embodiments of the present application, active equalization is achieved when the battery cells with unequal capacities are connected in series by matching the bidirectional voltage converter 30 with the simple equalization line 40, and an additional equalization module is not required, thereby reducing cost and loss.
In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present application, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and further implementations are included within the scope of the preferred embodiment of the present application in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the present application.
While embodiments of the present application have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the application, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the application.
Claims (11)
1. A charge-discharge circuit, comprising:
The battery cell module comprises a first battery cell and a second battery cell which are arranged in series, and the capacities of the first battery cell and the second battery cell are unequal;
A step-down charging chip;
The bidirectional voltage converter comprises a first end and a second end, wherein the first end is connected with the buck charging chip, and the first battery cell is respectively connected with the second end and the second battery cell; the bidirectional voltage converter can output the voltage of the step-down charging chip to the battery cell module for charging by doubling, and/or can reduce the voltage of the battery cell module by half and output the voltage to the step-down charging chip for supplying power to an electric element;
the equalization circuit comprises a first connecting end and a second connecting end, the first connecting end is connected with the first end, and the second connecting end is connected between the first battery cell and the second battery cell; under the condition that the voltage of the second battery cell is larger than that of the first end, current is output from the second battery cell to the first end through the equalizing circuit and then is output to the battery cell module through the bidirectional voltage converter, so that energy of the second battery cell is transferred into the first battery cell; under the condition that the voltage of the second battery cell is smaller than that of the first end, current is output from the battery cell module to the first end through the bidirectional voltage converter and then is output to the second battery cell through the equalizing circuit, so that energy of the first battery cell is transferred into the second battery cell.
2. The charge-discharge circuit of claim 1, wherein in the case where half of the voltage of the second terminal is greater than the voltage of the first terminal, the second terminal is an input terminal, the first terminal is an output terminal, and the second terminal discharges toward the first terminal.
3. The charge-discharge circuit of claim 1, wherein the first terminal is an input terminal, the second terminal is an output terminal, and the first terminal discharges toward the second terminal in the case where the voltage of the first terminal is greater than half the voltage of the second terminal.
4. The charge-discharge circuit of claim 1, wherein the equalization circuit further comprises a current limiting circuit for reducing the current of the equalization circuit.
5. The charge-discharge circuit of claim 1, wherein the equalization circuit further comprises a switching circuit for turning on if a voltage difference between the voltage at the first connection terminal and the voltage at the second connection terminal is within a preset voltage difference range, and turning off if the voltage difference is outside the preset voltage difference range.
6. The charge-discharge circuit of claim 1, wherein the charge-discharge circuit comprises a charge interface that charges through the buck charge chip and the bi-directional voltage converter output to the cell module when charged in a first charge mode.
7. The charge and discharge circuit of claim 6, wherein the charge interface is configured to output to the cell module for charging via a fast charge circuit when charging in a second charge mode, the second charge mode having a charge rate greater than the first charge mode.
8. An electronic device comprising the charge-discharge circuit of any one of claims 1-7 and an electrical component, the charge-discharge circuit being operable to power the electrical component.
9. The control method is used for a charge-discharge circuit and is characterized by comprising a battery cell module, a step-down charging chip, a bidirectional voltage converter and an equalizing circuit, wherein the battery cell module comprises a first battery cell and a second battery cell which are arranged in series, and the capacities of the first battery cell and the second battery cell are unequal; the bidirectional voltage converter comprises a first end and a second end, wherein the first end is connected with the step-down charging chip, and the first battery cell is respectively connected with the second end and the second battery cell; the bidirectional voltage converter can increase the voltage of the step-down charging chip and output the voltage to the battery cell module for charging, and/or the bidirectional voltage converter can reduce the voltage of the battery cell module and output the voltage to the step-down charging chip for supplying power to the electric element; the equalization circuit comprises a first connecting end and a second connecting end, the first connecting end is connected with the first end, and the second connecting end is connected between the first battery cell and the second battery cell; the control method comprises the following steps:
when the voltage of the second battery cell is larger than that of the first end, the first end is controlled to be an input end, the second end is controlled to be an output end, current is output from the second battery cell to the first end through the equalizing circuit, and then the current is output to the battery cell module through the bidirectional voltage converter, so that energy of the second battery cell is transferred to the first battery cell;
And under the condition that the voltage of the second battery cell is smaller than that of the first end, controlling the second end to be an input end, wherein the first end is an output end, and current is output from the battery cell module to the first end through the bidirectional voltage converter and then is output to the second battery cell through the equalizing circuit so as to realize energy transfer of the first battery cell to the second battery cell.
10. An electronic device comprising one or more processors and a memory storing a computer program that, when executed by the processor, implements the steps of the control method of claim 9.
11. 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 steps of the control method of claim 9.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211275906.5A CN117955187A (en) | 2022-10-18 | 2022-10-18 | Charging and discharging circuit, electronic device, control method, and readable storage medium |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211275906.5A CN117955187A (en) | 2022-10-18 | 2022-10-18 | Charging and discharging circuit, electronic device, control method, and readable storage medium |
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| Publication Number | Publication Date |
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| CN117955187A true CN117955187A (en) | 2024-04-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211275906.5A Pending CN117955187A (en) | 2022-10-18 | 2022-10-18 | Charging and discharging circuit, electronic device, control method, and readable storage medium |
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| Country | Link |
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| CN (1) | CN117955187A (en) |
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