CN113725931A - Battery pack charging circuit, battery pack discharging circuit and battery pack - Google Patents
Battery pack charging circuit, battery pack discharging circuit and battery pack Download PDFInfo
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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
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Abstract
The application provides a group battery charging circuit, group battery discharge circuit and group battery, wherein, group battery charging circuit includes: the battery pack comprises N battery cells; n voltage conversion circuits and power supply input ends; the input end of the ith voltage conversion circuit is connected with the power supply input end, the feedback end of the ith voltage conversion circuit is connected with the input end of the ith battery cell, and the output end of the ith voltage conversion circuit is connected with the input end of the ith battery cell; and the ith voltage conversion circuit is used for converting the voltage input by the power supply input end into the voltage which is the same as the current voltage of the ith battery cell. The circuit adjusts the voltage input from the external power supply input end to the battery cells through the voltage conversion circuit so as to provide corresponding required voltage for each battery cell, thereby reducing the size requirement on the battery cells, realizing the setting of a plurality of battery cells at different positions in a plurality of connection modes, increasing the battery capacity and improving the endurance time of the battery pack.
Description
Technical Field
The application relates to the technical field of electronic equipment, in particular to a battery pack charging circuit, a battery pack discharging circuit and a battery pack.
Background
At present, in the charging process of a mobile terminal, it is difficult to provide voltages required by each cell to two or more cells connected in parallel, so in the related art, a battery is usually a single cell, or, since the voltages of the cells are related to the sizes and volumes thereof, a design scheme of a battery with two cells having the same series size may also be adopted.
The above scheme of serially connecting two battery cells requires that the battery cells have the same size, so that a plurality of battery cells are inconvenient to arrange in the limited available space of the mobile terminal at present, which results in less battery capacity of the battery and is not beneficial to the endurance of the mobile terminal.
Content of application
The present application is directed to solving, at least to some extent, one of the technical problems in the related art.
Therefore, a first objective of the present application is to provide a battery pack charging circuit, which adjusts the voltage input from an external power input end to battery cells through a voltage conversion circuit according to the voltage difference between the power input end and each battery cell in the charging process, so as to provide the current required voltage for each battery cell, thereby reducing the size requirement for the battery cells, and can realize the space in the device where the battery pack is located according to mobile terminals and the like, and set up a plurality of battery cells at different positions in a plurality of connection modes, thereby increasing the battery capacity, and improving the endurance time of the battery pack.
A second objective of the present application is to provide a battery pack discharge circuit.
A third object of the present application is to provide a battery pack.
A fourth object of the present application is to provide another battery pack.
In order to achieve the above object, an embodiment of a first aspect of the present application provides a battery pack charging circuit, including: the battery pack comprises N battery cells, wherein N is an integer greater than 0; n voltage conversion circuits and power supply input ends; the input end of an ith voltage conversion circuit is connected with the power supply input end, the feedback end of the ith voltage conversion circuit is connected with the input end of an ith battery cell, the output end of the ith voltage conversion circuit is connected with the input end of the ith battery cell, and i is an integer which is greater than 0 and less than or equal to N; the ith voltage conversion circuit is configured to convert the voltage input by the power supply input end into a voltage that is the same as the current voltage of the ith battery cell.
The battery pack charging circuit of the embodiment of the application, according to the voltage difference of power input end and each electric core in the charging process, adjust the voltage that external power input end inputs to electric core through voltage conversion circuit, in order to provide the required voltage of current correspondence to each electric core, thereby the dimensional requirement to electric core has been reduced, can realize according to the space in the battery pack place equipment such as mobile terminal, set up a plurality of electric cores in different positions department with multiple connected mode, thereby the battery capacity has been increased, the duration of a journey of battery pack has been improved.
In order to achieve the above object, an embodiment of a second aspect of the present application proposes a battery pack discharge circuit, including: the battery pack comprises N battery cells, wherein N is an integer greater than 0; n voltage conversion circuits and power supply output ends; the input end of the ith voltage conversion circuit is connected with the output end of the ith battery cell, the feedback end of the ith voltage conversion circuit is connected with the power output end, the output end of the ith voltage conversion circuit is connected with the power output end, and i is an integer which is greater than 0 and less than or equal to N; and the ith voltage conversion circuit is used for converting the voltage output by the ith battery cell into the voltage which is the same as the voltage at the power output end.
The battery pack discharging circuit of the embodiment of the application, the difference of the voltage of each electric core output end and the voltage of power output end is according to in-process that discharges, through the voltage of each electric core external power supply of voltage conversion circuit adjustment, thereby under the condition that there is the difference in the voltage of each electric core, still can provide fixed voltage to the consumer of battery packs such as mobile terminal, the dimensional requirement to electric core has been reduced from this, can be according to the space situation in the equipment of battery pack place, set up a plurality of electric cores in different positions department with multiple connected mode, the battery capacity has been increased, the duration of battery pack has been improved.
In order to achieve the above object, an embodiment of a third aspect of the present application provides a battery pack including the battery pack charging circuit according to any one of the above embodiments, and the battery pack discharging circuit according to any one of the above embodiments.
In order to achieve the above object, a fourth embodiment of the present application provides another battery pack, including N battery cells, N voltage conversion circuits, N control circuits, N switching circuits, and an access terminal, where N is an integer greater than 0; a first input end of an ith control circuit is connected with an ith battery cell, a second input end of the ith control circuit is connected with the access terminal, an output end of the ith control circuit is connected with a first free end and a second free end of the ith switching circuit and used for controlling the first free end and the second free end of the ith switching circuit to be connected with corresponding fixed ends respectively according to voltage values input by the first input end and the second input end, and i is an integer greater than 0 and less than or equal to N; the first fixed end of the ith switching circuit is connected with the input end of the ith voltage conversion circuit, and the second fixed end of the ith switching circuit is connected with the output end of the ith voltage conversion circuit.
Additional aspects and advantages of the present 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 present application.
Drawings
The foregoing and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic structural diagram of a battery charging circuit according to an embodiment of the present disclosure;
fig. 2 is a schematic structural diagram of a specific battery charging circuit according to an embodiment of the present disclosure;
fig. 3 is a schematic structural diagram of a battery discharging circuit according to an embodiment of the present disclosure;
fig. 4 is a schematic structural diagram of a specific battery discharging circuit according to an embodiment of the present disclosure;
fig. 5 is a schematic structural diagram of another specific battery charging circuit according to an embodiment of the present disclosure;
fig. 6 is a schematic structural diagram of a battery pack according to an embodiment of the present disclosure; and
fig. 7 is a schematic structural diagram of another battery pack provided in an embodiment of the present application.
Detailed Description
Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present application and should not be construed as limiting the present application.
Each embodiment of the application is mainly used for solving the technical problems that in the related technology, because it is difficult to provide the voltage required by each electric core corresponding to the parallel double electric cores or multiple electric cores, a plurality of electric cores are inconvenient to be arranged in the limited available space of the mobile terminal, the battery capacity of the battery is less, and the endurance of the mobile terminal is not facilitated.
In order to solve the problems, the application provides a battery pack, a charging circuit and a discharging circuit of the battery pack, in the charging and discharging process of the battery pack, the voltage for charging each battery cell and supplying power to each battery cell is adjusted through a voltage conversion circuit, so that the size requirement of the battery cells is reduced, a plurality of battery cells can be arranged at different positions in multiple connection modes according to the space conditions in equipment where the battery pack is located, the battery capacity is increased, and the endurance time of the battery pack is prolonged.
A battery pack charging circuit, a battery pack discharging circuit, and a battery pack of the embodiments of the present application are described in detail below with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of a battery pack charging circuit according to an embodiment of the present disclosure, as shown in fig. 1, the battery pack charging circuit includes: a battery pack 10, N voltage conversion circuits 20, and a power input terminal 30.
As shown in fig. 1, the battery pack 10 includes N battery cells 11, where N is an integer greater than 0, an input end of an ith voltage conversion circuit 20 in the N voltage conversion circuits 20 is connected to the power input end 30, a feedback end of the ith voltage conversion circuit 20 is connected to an input end of an ith battery cell 11 in the battery pack 10, and an output end of the ith voltage conversion circuit 20 is connected to an input end of the ith battery cell 11, where i is an integer greater than 0 and less than or equal to N.
That is, each of the N voltage conversion circuits 20 is connected to a corresponding battery cell in the battery pack 10 according to the above connection manner, and then connected to the power input terminal 30, so that the N battery cells 11 are connected to the corresponding voltage conversion circuit 20 to form parallel connection. Of course, in other embodiments of the present application, the N battery cells 11 may also be connected in other various connection manners, for example, the N battery cells 11 are connected to the power input end 30 in a series-parallel connection manner, and it is only necessary to ensure that each battery cell is connected to a corresponding voltage conversion circuit.
The ith voltage conversion circuit 20 is configured to convert the voltage input by the power input terminal 30 into a voltage that is the same as the current voltage of the ith battery cell 11. The voltage converting circuit 20 may be a DC-DC circuit having a step-up and step-down function, such as a BUCK/BOOST circuit, for converting the voltage inputted from the power input terminal 30.
Specifically, in the charging process of the battery pack 10, the voltage input to the external power input end 30 of the battery pack 10 passes through each voltage conversion circuit 20, and the voltage conversion circuit 20 performs voltage boosting or voltage dropping conversion to convert the externally input voltage into the charging voltage required by the corresponding electric core 11, for example, the voltage input to the power input end 30 is converted into a fixed voltage with the same size, or each voltage conversion circuit 20 converts the input voltage into a preset voltage which is the same as the voltage of the corresponding electric core 11. Then, the converted charging voltage is output to the corresponding battery cell 11 through the output terminal thereof.
Further, since the voltage of the battery cell may change during the charging process, the feedback end of each voltage conversion circuit 20 obtains the current actual voltage of each battery cell 11 from the input end of the corresponding battery cell 11, and then performs corresponding voltage conversion, so as to convert the voltage input by the power input end 30 into the same voltage as the current voltage of the corresponding battery cell 11, for example, if the current voltage of the ith battery cell 11 is 3.8V, and the voltage input by the power input end 30 is 4.2V, the corresponding voltage conversion circuit 20 reduces the input 4.2V to 3.8V, so as to charge the battery cell.
From this, this group battery charging circuit compares the voltage of power input and the current voltage of the electric core that corresponds in order to carry out the pressure differential management and control, convert the voltage of power input into the voltage that the current voltage of electric core is the same, thereby can realize charging the electric core of different voltages, the dimensional requirement to electric core has been reduced, can make to contain the electric core of not unidimensional in the group battery, and freely set up the position that each electric core belonged to according to the space in the equipment of group battery place, for example, narrow and small region in space in mobile terminal's printed circuit board, set up the less electric core of volume, thereby available space in the make full use of mobile terminal, the capacity of the group battery that increases.
The battery pack charging circuit of the embodiment of the application, in the charging process, according to the pressure difference of the power input end and each electric core, the voltage input to the electric core is adjusted through the voltage conversion circuit by the external power input end, so that the current required voltage corresponding to each electric core is provided, the size requirement on the electric core is reduced, the space in the equipment where the battery pack is located can be realized according to the mobile terminal and the like, a plurality of electric cores are arranged at different positions in multiple connection modes, the battery capacity is increased, and the endurance time of the battery pack is prolonged.
In order to more clearly illustrate the operation process of the voltage conversion circuit in the embodiment of the present application, a specific battery pack charging circuit proposed in the present application is described below, and fig. 2 is a schematic structural diagram of the specific battery pack charging circuit provided in the embodiment of the present application.
As shown in fig. 2, taking any one of the N voltage conversion circuits 20 in the above-described embodiments as an example, each voltage conversion circuit 20 further includes a voltage boosting circuit 21, a voltage dropping circuit 22, a control circuit 23, and a switching circuit 24, respectively, in addition to the battery pack charging circuit shown in fig. 1.
The power input end 30 is connected to the free end 243 of the switching circuit 24 and the first input end 231 of the control circuit 23, the first fixed end 241 of the switching circuit 24 is connected to the input end of the voltage boost circuit 21, the second fixed end 242 of the switching circuit is connected to the input end of the voltage step-down circuit, the second input end 232 of the control circuit 23 is connected to the input end of the corresponding electric core 11, the output end 233 of the control circuit 23 is connected to the control end 244 of the switching circuit 24, and the output ends of the voltage boost circuit 21 and the voltage step-down circuit 22 are connected to the input ends of the corresponding electric core 11.
In a specific application, the control circuit 23 is configured to control the free end 243 of the switching circuit 24 to be connected to the second fixed end 242 when it is determined that the voltage at the input end of the battery cell 11 is smaller than the voltage input at the power input end 30, and control the free end 243 of the switching circuit 24 to be connected to the first fixed end 241 when it is determined that the voltage at the input end of the battery cell 11 is larger than the voltage input at the power input end 30.
The second input end 232 of the control circuit 23 in this embodiment is equivalent to the feedback end in the above embodiment, and is configured to obtain the current actual voltage of the battery cell 11 from the input end of the corresponding battery cell 11, and compare the current actual voltage with the voltage input by the power input end 30, if the current voltage of the battery cell 11 is smaller than the voltage input by the power input end 30, the step-down circuit 22 is connected through the switching circuit 24, the voltage input by the power input end 30 is reduced to the current voltage of the battery cell 11 through the step-down circuit 22, if the current voltage of the battery cell 11 is greater than the voltage input by the power input end 30, the step-up circuit 21 is connected through the switching circuit 24, and the voltage input by the power input end 30 is raised to the current voltage of the battery cell 11 through the step-up circuit 21. Therefore, the voltage input by the power input end is converted into the voltage with the same current voltage of the battery cell by comparing the voltage input by the power input end with the current voltage of the corresponding battery cell to carry out voltage difference management and control.
It should be noted that, in practical applications, the voltage input at the power input end and the current voltage of the corresponding electric core may have different proportional relationships, and specifically, when the step-up/step-down circuit is controlled to perform voltage conversion at a corresponding degree, as a possible implementation manner, a power switching device may be arranged in the voltage conversion circuit in advance, so that the control circuit may control the operating frequency and/or the on-duty ratio of the power switching device according to the difference between the voltage at the input end of the electric core and the voltage at the power input end, so as to adjust the relationship between the input voltage and the output voltage of the conversion circuit, and implement the step-up conversion and the step-down conversion at a corresponding degree.
Based on the above embodiments, it can be understood that, when the battery pack includes a plurality of battery cells with different sizes, it is further necessary to ensure that voltages output by the battery cells are the same in the discharging process of the battery pack, so as to implement power supply of the electrical equipment. Therefore, the present application further provides a battery pack discharging circuit, and fig. 3 is a schematic structural diagram of the battery pack discharging circuit provided in the embodiment of the present application.
As shown in fig. 3, the battery discharge circuit includes: the battery pack 10, N voltage conversion circuits 20, and a power output terminal 30.
As shown in fig. 3, the battery pack 10 includes N battery cells, where N is an integer greater than 0, an input end of an ith voltage conversion circuit 20 in the N voltage conversion circuits 20 is connected to an output end of the ith battery cell, a feedback end of the ith voltage conversion circuit 20 is connected to an output end of the ith battery cell, and an output end 20 of the ith voltage conversion circuit is connected to a power output end 30, where i is an integer greater than 0 and less than or equal to N.
That is, each battery cell in the battery pack 10 is connected to the corresponding voltage conversion circuit 20 according to the above connection manner, and then is connected to the power output end 30, and of course, in other embodiments of the present application, the N battery cells 11 may also be connected to the power output end 30 through other multiple connection manners to supply power to the power output end 30, and it is only necessary to ensure that each battery cell is connected to the corresponding voltage conversion circuit.
And the ith voltage conversion circuit 20 is configured to convert the voltage output by the ith battery cell into a voltage that is the same as the voltage at the power output terminal 30. The voltage conversion circuit 20 may be a DC-DC circuit having a voltage boosting function and a voltage dropping function, such as a BUCK/BOOST circuit, to convert the voltage output by each of the battery cells 11.
Specifically, in the discharging process of the battery pack 10, the voltage output from each battery cell 11 passes through each voltage conversion circuit 20, the voltage conversion circuits 20 perform voltage boosting or voltage dropping conversion, the voltages output from each battery cell 11 are converted into voltages with the same magnitude, the voltages are preset voltages at the power output end 30, and then the power output end 30 supplies power to the electrical equipment where the battery pack 10 is located.
For example, set up power output 30 voltage according to the consumer demand in advance and be 4.0V, if first electric core 11 is 4.2V to the voltage of outer output, and second electric core 11 is 3.8V to the voltage of outer output, then voltage conversion circuit 20 that first electric core 11 and second electric core 11 correspond carries out step-down transform and step-up transform respectively, all convert the voltage of first electric core 11 and second electric core 11 output into 4.0V and export power output 30 behind with supplying power through group battery 10.
Further, since the voltage of the battery cell may change during the discharging process, the feedback end of each voltage conversion circuit 20 obtains the current output voltage of each battery cell 11 from the output end of the corresponding battery cell 11, and then performs corresponding voltage conversion, so as to convert the voltage output by each battery cell 11 into the voltage the same as the voltage of the power output end 30, thereby implementing real-time monitoring of the output voltage of each battery cell 11, and ensuring that the voltages output by each battery cell 11 to the power output end during the discharging process are the same.
Therefore, the battery pack discharging circuit compares the current output voltage of each battery cell with the voltage of the power output end and performs pressure difference control, so that the voltage output by each battery cell is kept consistent, thereby being capable of realizing the simultaneous discharging of the battery cells with a plurality of different voltages, reducing the size requirement on the battery cells, being capable of enabling the battery packs to contain the battery cells with different sizes, and freely setting the positions of the battery cells according to the space in the equipment where the battery packs are located, for example, a narrow and small area is arranged in the printed circuit board of the mobile terminal, and the battery cells with small size are arranged, thereby fully utilizing the available space in the mobile terminal and increasing the capacity of the battery pack.
The battery pack discharging circuit of the embodiment of the application, the difference of the voltage of each electric core output end and the voltage of power output end is according to in-process that discharges, through the voltage of each electric core external power supply of voltage conversion circuit adjustment, thereby under the condition that there is the difference in the voltage of each electric core, still can provide fixed voltage to the consumer of battery packs such as mobile terminal, the dimensional requirement to electric core has been reduced from this, can be according to the space situation in the equipment of battery pack place, set up a plurality of electric cores in different positions department with multiple connected mode, the battery capacity has been increased, the duration of battery pack has been improved.
In order to more clearly explain the operation process of the voltage conversion circuit in the embodiment of the present application, a specific battery discharging circuit proposed in the present application is described below, and fig. 4 is a schematic structural diagram of the specific battery discharging circuit provided in the embodiment of the present application.
As shown in fig. 4, taking any one of the N voltage conversion circuits 20 in the above-described embodiment as an example, each voltage conversion circuit 20 further includes a voltage boosting circuit 21, a voltage dropping circuit 22, a control circuit 23, and a switching circuit 24, respectively, in addition to the battery pack discharge circuit shown in fig. 3.
The output end of the electric core is connected with the first input end of the free end control circuit 23 of the switching circuit 24, the first fixed end 241 of the switching circuit 24 is connected with the input end of the voltage boosting circuit 21, the second fixed end 242 of the switching circuit 24 is connected with the input end of the voltage reducing circuit 22, the second input end of the control circuit 23 is connected with the power output end 30, the output end of the control circuit 23 is connected with the control end 244 of the switching circuit 24, and the output ends of the voltage boosting circuit 21 and the voltage reducing circuit 22 are connected with the power output end 30.
In a specific application, the control circuit 23 is configured to control the free end 243 of the switching circuit 24 to be connected to the first fixed end 241 when it is determined that the voltage of the output end of the battery cell 11 is smaller than the voltage of the power output end 30, and control the free end of the switching circuit 24 to be connected to the second fixed end when it is determined that the voltage of the output end of the battery cell 11 is larger than the voltage of the power output end 30.
In this embodiment, the first input end 231 of the control circuit 23 may be used as a feedback end, obtain the current output voltage of the battery cell 11 from the output end of the corresponding battery cell 11, and compare the current output voltage with the voltage of the power output end 30, if the current output voltage of the battery cell 11 is smaller than the voltage of the power output end 30, connect the boost circuit 22 through the switching circuit 24, boost the voltage output by the battery cell 11 to the voltage required by the power output end 30 through the boost circuit 22, if the current output voltage of the battery cell 11 is greater than the voltage of the power output end 30, connect the buck circuit 21 through the switching circuit 24, and reduce the current output voltage of the battery cell 11 to the voltage required by the power output end 30 through the buck circuit 21.
Therefore, the voltage output by each battery cell is kept consistent, and a plurality of battery cells with different voltages in the battery pack 10 are discharged simultaneously to supply power to the electric equipment, so that the size requirement on the battery cells in the battery pack is reduced.
Similarly, in practical applications, the current output voltage of the battery cell may have a different proportional relationship with the voltage at the power output end, and specifically, when the step-up/step-down circuit is controlled to perform voltage conversion at a corresponding degree, as a possible implementation manner, a power switching device may be arranged in the voltage conversion circuit in advance, so that the control circuit may control the operating frequency and/or the on-duty ratio of the power switching device according to the difference between the voltage at the output end of the battery cell and the voltage at the power output end, so as to adjust the relationship between the input voltage and the output voltage of the conversion circuit, and implement the step-up conversion and the step-down conversion at a corresponding degree.
In order to more clearly describe the operation process of the battery charging circuit according to the embodiment of the present application, a specific embodiment of the battery charging circuit for performing step-down charging in practical applications is described below:
as shown in fig. 5, the battery pack charging circuit is connected between a power input terminal and a protection board, and a voltage input from the power input terminal is input to each cell of the battery pack through the battery pack charging circuit and the protection board, wherein, on the basis of the above embodiments, the battery pack charging circuit further includes N comparators, each comparator obtains and compares a voltage at the power input terminal and a current voltage of the cell in real time, when the voltage at the power input terminal is greater than the current voltage of the cell, the comparator sends a determination result to the control module, the control module sends an instruction for connecting a corresponding BUCK circuit to the switch according to the received determination result, after the BUCK circuit is connected, the BUCK circuit is controlled to perform corresponding step-down conversion on the voltage input from the power input terminal by controlling the operating frequency and/or the on duty ratio of the power switch device, and enabling the voltage output by the BUCK circuit to be equal to the current voltage of the battery cell.
In order to implement the above embodiments, the present embodiment further provides a battery pack 100, as shown in fig. 6, the battery pack 100 includes a battery pack charging circuit 200 according to any of the above embodiments, and a battery pack discharging circuit 300 according to any of the above embodiments.
In order to implement the above embodiments, the present embodiment further provides another battery pack 1000, as shown in fig. 7, where the battery pack 1000 includes: the battery comprises N battery cores 100, N voltage conversion circuits 200, N control circuits 300, N switching circuits 400 and an access terminal 500, wherein N is an integer greater than 0;
a first input end of the ith control circuit 300 is connected to the ith battery cell 100, a second input end of the ith control circuit 300 is connected to the access terminal 500, an output end of the ith control circuit 400 is connected to the first free end 410 and the second free end 420 of the ith switching circuit 400, and the first free end 410 and the second free end 420 of the ith switching circuit 400 are respectively controlled to be connected to corresponding fixed ends according to voltage values input by the first input end and the second input end of the control circuit 300, wherein the first fixed end 430 of the ith switching circuit 400 is connected to an input end of the ith voltage conversion circuit 200, the second fixed end 440 of the ith switching circuit is connected to an output end of the ith voltage conversion circuit 200, and i is an integer greater than 0 and less than or equal to N.
In an embodiment of the present application, the voltage conversion circuit 200 may include the voltage boost circuit and the voltage step-down circuit described in the above embodiments, and an output end of the voltage conversion circuit 200 may be connected to an input end of the battery cell 100 or an output end of the power supply according to the current charge and discharge state. The access terminal 500 may be connected to a power input terminal or a power output terminal according to a state of the battery pack 1000 at present, and connected to an input terminal or an output terminal of the ith battery cell 100 to obtain feedback information of the input terminal or the output terminal of the battery cell 100 during charging or discharging. Therefore, the control circuit 300 may control the battery pack to perform corresponding connection according to the current charge and discharge state, and control the voltage converting circuit 200 to perform corresponding step-up or step-down conversion, and the specific implementation process may refer to the description of the above embodiment.
Therefore, the battery pack can control the voltage conversion circuit to perform corresponding voltage conversion according to the current actual charging state or discharging state so as to discharge and charge the battery cells with different voltages.
In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited 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 steps of a custom logic function or process, and alternate 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.
The logic and/or steps represented in the flowcharts or otherwise described herein, e.g., an ordered listing of executable instructions that can be considered to implement logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, 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 (electronic device) having one or more wires, a portable computer diskette (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). Additionally, the computer-readable medium could even be paper or another suitable medium upon which the program is printed, as the program can be electronically captured, via for instance optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner if necessary, and then stored in a computer memory.
It should be understood that portions of the present application may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. If implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and when the program is executed, the program includes one or a combination of the steps of the method embodiments.
In addition, functional units in the embodiments of the present application may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may also be stored in a computer readable storage medium.
The storage medium mentioned above may be a read-only memory, a magnetic or optical disk, etc. Although embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application, and that variations, modifications, substitutions and alterations may be made to the above embodiments by those of ordinary skill in the art within the scope of the present application.
Claims (10)
1. A battery pack charging circuit, comprising:
the battery pack comprises N battery cells, wherein N is an integer greater than 0;
n voltage conversion circuits and power supply input ends;
the input end of an ith voltage conversion circuit is connected with the power supply input end, the feedback end of the ith voltage conversion circuit is connected with the input end of an ith battery cell, the output end of the ith voltage conversion circuit is connected with the input end of the ith battery cell, and i is an integer which is greater than 0 and less than or equal to N;
the ith voltage conversion circuit is configured to convert the voltage input by the power supply input end into a voltage that is the same as the current voltage of the ith battery cell.
2. The charging circuit of claim 1, wherein the ith voltage conversion circuit comprises an ith boost circuit, an ith buck circuit, an ith control circuit and an ith switching circuit;
the power supply input end is respectively connected with the free end of the ith switching circuit and the first input end of the ith control circuit;
a first fixed end of the ith switching circuit is connected with the input end of the ith boosting circuit, and a second fixed end of the ith switching circuit is connected with the input end of the ith voltage reducing circuit;
a second input end of the ith control circuit is connected with an input end of the ith battery cell,
and the output end of the ith control circuit is connected with the control end of the ith switching circuit.
3. The charging circuit of claim 2, wherein the ith control circuit is configured to control the free end of the ith switching circuit to be connected to the second fixed end when the voltage at the input end of the ith cell is determined to be less than the voltage at the power input end, and to control the free end of the ith switching circuit to be connected to the first fixed end when the voltage at the input end of the ith cell is determined to be greater than the voltage at the power input end.
4. A battery charging circuit according to claim 2 or 3, wherein the ith voltage conversion circuit includes a power switch device;
the ith control circuit is specifically configured to control the operating frequency and/or the on-duty ratio of the power switching device according to a difference between the input voltage of the ith battery cell and the input voltage of the power supply input end.
5. A battery discharge circuit, comprising:
the battery pack comprises N battery cells, wherein N is an integer greater than 0;
n voltage conversion circuits and power supply output ends;
the input end of an ith voltage conversion circuit is connected with the output end of an ith electric core, the feedback end of the ith voltage conversion circuit is connected with the output end of the ith electric core, the output end of the ith voltage conversion circuit is connected with the power supply output end, and i is an integer which is greater than 0 and less than or equal to N;
the ith voltage conversion circuit is configured to convert the voltage output by the ith battery cell into a voltage that is the same as the voltage at the power output end.
6. The discharge circuit of claim 5, wherein the ith voltage conversion circuit comprises an ith boost circuit, an ith buck circuit, an ith control circuit and an ith switching circuit;
the output end of the ith battery cell is respectively connected with the free end of the ith switching circuit and the first input end of the ith control circuit;
a first fixed end of the ith switching circuit is connected with the input end of the ith boosting circuit, and a second fixed end of the ith switching circuit is connected with the input end of the ith voltage reducing circuit;
the second input end of the ith control circuit is connected with the power supply output end,
and the output end of the ith control circuit is connected with the control end of the ith switching circuit.
7. The discharge circuit of claim 6, wherein the ith control circuit is configured to control the free end of the ith switching circuit to be connected to the first fixed end when the output terminal voltage of the ith cell is determined to be less than the power supply output terminal voltage, and to control the free end of the ith switching circuit to be connected to the second fixed end when the output terminal voltage of the ith cell is determined to be greater than the power supply output terminal voltage.
8. The discharge circuit of claim 6 or 7, wherein the ith voltage conversion circuit includes a power switch device;
the ith control circuit is specifically configured to control the operating frequency and/or the on-duty ratio of the power switching device according to a difference between the output voltage of the ith battery cell and the output voltage of the power output terminal.
9. A battery pack comprising a battery pack charging circuit as claimed in any one of claims 1 to 4 and a battery pack discharging circuit as claimed in any one of claims 1 to 4.
10. A battery pack is characterized by comprising N battery cells, N voltage conversion circuits, N control circuits, N switching circuits and an access terminal, wherein N is an integer greater than 0;
the first input end of an ith control circuit is connected with an ith battery cell, the second input end of the ith control circuit is connected with the access terminal, the output end of the ith control circuit is connected with the first free end and the second free end of the ith switching circuit and used for controlling the first free end and the second free end of the ith switching circuit to be connected with the corresponding fixed ends respectively according to voltage values input by the first input end of the control circuit and the second input end of the control circuit, and i is an integer greater than 0 and less than or equal to N;
the first fixed end of the ith switching circuit is connected with the input end of the ith voltage conversion circuit, and the second fixed end of the ith switching circuit is connected with the output end of the ith voltage conversion circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010450909.2A CN113725931A (en) | 2020-05-25 | 2020-05-25 | Battery pack charging circuit, battery pack discharging circuit and battery pack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010450909.2A CN113725931A (en) | 2020-05-25 | 2020-05-25 | Battery pack charging circuit, battery pack discharging circuit and battery pack |
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| CN113725931A true CN113725931A (en) | 2021-11-30 |
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| CN202010450909.2A Pending CN113725931A (en) | 2020-05-25 | 2020-05-25 | Battery pack charging circuit, battery pack discharging circuit and battery pack |
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