CN117254540A - Battery control circuit, method, terminal device and storage medium - Google Patents
Battery control circuit, method, terminal device and storage medium Download PDFInfo
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- CN117254540A CN117254540A CN202210654670.XA CN202210654670A CN117254540A CN 117254540 A CN117254540 A CN 117254540A CN 202210654670 A CN202210654670 A CN 202210654670A CN 117254540 A CN117254540 A CN 117254540A
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- 238000000034 method Methods 0.000 title claims description 21
- 230000009467 reduction Effects 0.000 claims abstract description 121
- 230000009466 transformation Effects 0.000 claims abstract description 44
- 238000007599 discharging Methods 0.000 claims description 21
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- 238000004590 computer program Methods 0.000 claims description 4
- 238000004364 calculation method Methods 0.000 claims description 3
- 230000010354 integration Effects 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 230000005611 electricity Effects 0.000 abstract description 4
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 14
- 229910001416 lithium ion Inorganic materials 0.000 description 14
- 238000010586 diagram Methods 0.000 description 8
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- 239000004065 semiconductor Substances 0.000 description 2
- 239000002210 silicon-based material Substances 0.000 description 2
- 239000010409 thin film Substances 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
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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
- H02J7/0063—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with circuits adapted for supplying loads from the battery
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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
- H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
- H02J7/007182—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters in response to battery voltage
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Abstract
The battery control circuit comprises a control module and a voltage transformation module, wherein the voltage transformation module comprises a first voltage reduction unit and a second voltage reduction unit, when the output voltage of a battery is higher, the first voltage reduction unit reduces the output voltage according to a preset voltage reduction multiple, the voltage reduction can be rapidly and conveniently completed, when the output voltage of the battery is lower, the second voltage reduction unit can adjust a variable voltage reduction multiple according to the output voltage of the current battery and the working voltage of a load so as to flexibly determine the voltage reduction multiple according to actual working conditions, the working stability of the load can be ensured when the first discharge voltage and the second discharge voltage are used for supplying power to the load, and the suitability of the battery and the load and the electricity safety of the battery are improved; and by integrating the first voltage reducing unit and the second voltage reducing unit in the voltage transformation module, the area of the voltage transformation element in the battery control circuit is reduced, the integration level and wiring flexibility of the battery control circuit can be improved, and the production cost can be reduced.
Description
Technical Field
The application belongs to the technical field of batteries, and particularly relates to a battery control circuit, a battery control method, terminal equipment and a storage medium.
Background
Along with the continuous improvement and development of the lithium ion battery (Lithium Lon Cells And Batteries) technology, the application of the lithium ion battery in different fields is more and more extensive, and the lithium ion battery can be applied to electronic equipment such as a mobile phone, a notebook computer, a camera and the like, and can also be applied to electric equipment such as an electric bicycle, an electric automobile, an electric airplane and the like. At present, a plurality of lithium ion batteries are commonly connected in series to form a lithium ion battery pack with a multi-cell structure, so that the charging power can be improved, and the charging time can be shortened.
When the lithium ion battery pack with the multi-cell structure is used for supplying power to electronic equipment, the output voltage of the lithium ion battery pack is increased by times compared with the output voltage of a single lithium ion battery, and the output voltage is easily overhigh and exceeds the rated working voltage of each component in the electronic equipment, so that the components are over-pressed and damaged. Therefore, how to ensure the working stability of the electric equipment when the lithium ion battery pack with the multi-cell structure is used for supplying power is a current problem to be solved urgently.
Disclosure of Invention
In view of this, the embodiments of the present application provide a battery control circuit, a method, a terminal device, and a storage medium, so as to solve the problem that when a lithium ion battery is connected in series with multiple batteries, the output voltage is easily too high to damage components.
A first aspect of an embodiment of the present application provides a battery control circuit, including a control module and a voltage transformation module, where the voltage transformation module includes a first voltage reduction unit and a second voltage reduction unit, and the control module is connected with the first voltage reduction unit and the second voltage reduction unit respectively;
the control module is used for being connected with a battery, and sending a first discharging signal to the first voltage reduction unit when the output voltage of the battery is greater than or equal to a preset output voltage; when the output voltage of the battery is smaller than a preset output voltage, a second discharging signal is sent to the second voltage reducing unit;
the first voltage reduction unit is used for being connected with the battery and the load respectively, reducing the output voltage according to the first discharge signal and a preset voltage reduction multiple to obtain a first discharge voltage and outputting the first discharge voltage to the load;
the second voltage reduction unit is used for being connected with the battery and the load respectively, obtaining variable voltage reduction multiples according to the second discharge signals, reducing the output voltage to obtain a second discharge voltage and outputting the second discharge voltage to the load;
the variable voltage reduction multiple is determined according to the output voltage of the battery and the working voltage of the load, and is smaller than the preset voltage reduction multiple.
The first aspect of the embodiment of the application provides a battery control circuit, which comprises a control module and a voltage transformation module, wherein the voltage transformation module comprises a first voltage reduction unit and a second voltage reduction unit, when the output voltage of a battery is higher, the first voltage reduction unit reduces the output voltage according to a preset voltage reduction multiple, so that the voltage reduction can be quickly and conveniently completed, when the output voltage of the battery is lower, the second voltage reduction unit can adjust a variable voltage reduction multiple according to the output voltage of the current battery and the working voltage of a load, so that the voltage reduction multiple can be flexibly determined according to actual working conditions, the working stability of the load can be ensured when the first discharge voltage and the second discharge voltage are used for supplying power to the load, and the suitability of the battery and the load and the electricity use safety of the battery are improved; and by integrating the first voltage reducing unit and the second voltage reducing unit in the voltage transformation module, the area of the voltage transformation element in the battery control circuit is reduced, the integration level and wiring flexibility of the battery control circuit can be improved, and the production cost can be reduced.
A second aspect of the embodiments of the present application provides a terminal device, including a battery, a load, and a battery control circuit provided in the first aspect of the embodiments of the present application, where the battery control circuit is connected to the battery and the load respectively.
A third aspect of the embodiments of the present application provides a battery control method, which is applied to the battery control circuit provided in the first aspect of the embodiments of the present application, and the method includes:
when the output voltage of the battery is greater than or equal to a preset output voltage, a first discharging signal is sent to a first voltage reducing unit;
when the output voltage of the battery is smaller than the preset output voltage, a second discharging signal is sent to a second voltage reducing unit;
the output voltage is reduced by the first voltage reduction unit according to the first discharge signal and a preset voltage reduction multiple, so that a first discharge voltage is obtained and output to a load;
obtaining variable voltage reduction multiples according to the second discharge signals through the second voltage reduction unit, reducing the output voltage to obtain second discharge voltage and outputting the second discharge voltage to a load;
the variable voltage reduction multiple is determined according to the output voltage of the battery and the working voltage of the load, and is smaller than the preset voltage reduction multiple.
A fourth aspect of the embodiments of the present application provides a computer-readable storage medium storing a computer program which, when executed by a processor, implements the steps of the battery control method provided in the third aspect of the embodiments of the present application.
It will be appreciated that the advantages of the second aspect to the fourth aspect may be referred to in the description of the first aspect, and will not be repeated here.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following description will briefly introduce the drawings that are needed in the embodiments or the description of the prior art, it is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a first terminal device provided in an embodiment of the present application;
fig. 2 is a schematic diagram of a first structure of a battery control circuit according to an embodiment of the present application;
fig. 3 is a schematic diagram of a second structure of the battery control circuit according to the embodiment of the present application;
fig. 4 is a schematic diagram of a third structure of the battery control circuit according to the embodiment of the present application;
fig. 5 is a schematic diagram of a fourth configuration of a battery control circuit provided in an embodiment of the present application;
fig. 6 is a schematic diagram of a first flow of a battery control method according to an embodiment of the present disclosure;
fig. 7 is a schematic diagram of a second flow of a battery control method according to an embodiment of the present disclosure;
Fig. 8 is a schematic diagram of a second structure of a terminal device according to an embodiment of the present application.
Detailed Description
In the following description, for purposes of explanation and not limitation, specific details are set forth, such as particular system configurations, techniques, etc. in order to provide a thorough understanding of the embodiments of the present application. It will be apparent, however, to one skilled in the art that the present application may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present application with unnecessary detail.
It should be understood that the terms "comprises" and/or "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
It should also be understood that the term "and/or" as used in this specification and the appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes such combinations.
As used in this specification and the appended claims, the term "if" may be interpreted as "when..once" or "in response to a determination" or "in response to detection" depending on the context. Similarly, the phrase "if a determination" or "if a [ described condition or event ] is detected" may be interpreted in the context of meaning "upon determination" or "in response to determination" or "upon detection of a [ described condition or event ]" or "in response to detection of a [ described condition or event ]".
In addition, in the description of the present application and the appended claims, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and are not to be construed as indicating or implying relative importance.
Reference in the specification to "one embodiment" or "some embodiments" or the like means that a particular feature, structure, or characteristic described in connection with the embodiment is included in one or more embodiments of the application. Thus, appearances of the phrases "in one embodiment," "in some embodiments," "in other embodiments," and the like in the specification are not necessarily all referring to the same embodiment, but mean "one or more but not all embodiments" unless expressly specified otherwise. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless expressly specified otherwise.
In application, when the lithium ion battery pack with the multi-cell structure is used for supplying power to electronic equipment, the output voltage of the lithium ion battery pack is increased by times compared with the output voltage of a single lithium ion battery, and the output voltage is easily overhigh and exceeds the rated working voltage of each component in the electronic equipment, so that the components are over-pressed and damaged. Therefore, how to ensure the working stability of the electric equipment when the lithium ion battery pack with the multi-cell structure is used for supplying power is a current problem to be solved urgently.
In view of the above technical problems, the embodiment of the present application provides a battery control circuit, including a control module and a voltage transformation module, where the voltage transformation module includes a first voltage reduction unit and a second voltage reduction unit, when the output voltage of the battery is higher, the first voltage reduction unit reduces the output voltage according to a preset voltage reduction multiple, so that the voltage reduction can be quickly and conveniently completed, when the output voltage of the battery is lower, the second voltage reduction unit can adjust a variable voltage reduction multiple according to the output voltage of the current battery and the working voltage of the load, so as to flexibly determine the voltage reduction multiple according to the actual working condition, so that the working stability of the load can be ensured when the first discharge voltage and the second discharge voltage are used for power supply of the load, and the suitability of the battery and the load and the power safety of the battery are improved; and by integrating the first voltage reducing unit and the second voltage reducing unit in the voltage transformation module, the area of the voltage transformation element in the battery control circuit is reduced, the integration level and wiring flexibility of the battery control circuit can be improved, and the production cost can be reduced.
The battery control circuit provided by the embodiment of the application can be applied to terminal equipment provided with a battery. The terminal device may be a mobile phone, a tablet computer, a wearable device, a vehicle-mounted device, an augmented reality (augmented reality, AR)/Virtual Reality (VR) device, a notebook computer, an ultra-mobile personal computer (UMPC), a netbook, a personal digital assistant (personal digital assistant, PDA), or the like, and the specific type of the terminal device is not limited in the embodiments of the present application.
Fig. 1 exemplarily shows a schematic structure of a terminal device 100, and the terminal device 100 may include a power module 110 and a load 120, the power module 110 may include a battery 111, and the load 120 may include a processor 10, a memory 20, an audio module 30, a camera module 40, a sensor module 50, an input module 60, a display module 70, a wireless communication module 80, and the like. The audio module 30 may include a speaker 31, a microphone 32, and the like, the camera module 40 may include a short-focus camera 41, a long-focus camera 42, a flash 43, and the like, the sensor module 50 may include an infrared sensor 51, an acceleration sensor 52, a position sensor 53, a fingerprint sensor 54, an iris sensor 55, and the like, the input module 60 may include a touch panel 61, an external input unit 62, and the like, and the Wireless communication module 80 may include Wireless communication units such as bluetooth, optical Wireless communication (Optical Wireless), mobile communication (Mobile Communications), wireless local area network (Wireless Local Area Network, WLAN), near field communication (Near Field Communication, NFC), and ZigBee (ZigBee).
In application, the battery 111 may be a single-cell battery or a multi-cell battery formed by connecting at least two cells in series, specifically may be a battery formed by connecting two cells in series, and compared with a single-cell battery, under the same working condition, the output voltage of the battery formed by connecting two cells in series is about twice of the output voltage of the single-cell battery, and the battery has the characteristics of large battery capacity and high output voltage; the material of the negative electrode of the battery 111 may be a carbon material, specifically an artificial graphite material or a natural graphite material; the material may be a non-carbon material, and specifically may be a silicon-based material, an alloy material, a metal oxide material, or the like. The battery 111 may specifically include a first electric core and a second electric core, where the first electric core and the second electric core are connected in series, and a negative electrode of the first electric core and a negative electrode of the second electric core are made of a silicon material, and the specific type of the battery 111 is not limited in the embodiments of the present application. The power module 110 may further include a fuel gauge (Coulomb Counter) that may be used to detect the remaining power of the battery 111, and may also be used to detect the output voltage of the battery 111. The power module 110 is used to supply power to the load 120 of the terminal device 100 through the battery 111.
In application, the processor 10 may be a central processing unit (Central Processing Unit, CPU), which may also be other general purpose processors, digital signal processors (Digital Signal Processor, DSPs), application specific integrated circuits (Application Specific Integrated Circuit, ASICs), off-the-shelf programmable gate arrays (Field-Programmable Gate Array, FPGAs) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, or the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
In applications, the memory 20 may in some embodiments be an internal storage unit of the terminal device, such as a hard disk or a memory of the terminal device. The memory 20 may in other embodiments also be an external storage device of the terminal device, such as a plug-in hard disk provided on the terminal device, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash Card (Flash Card) or the like. Further, the memory 20 may also include both an internal storage unit of the terminal device and an external storage device. The memory 20 is used for storing an operating system, application programs, boot loader (BootLoader), data, and other programs, etc., such as program codes of computer programs, etc. The memory 20 may also be used to temporarily store data that has been output or is to be output.
It is to be understood that the structure illustrated in the embodiment of the present application does not constitute a specific limitation on the terminal device 100. In other embodiments of the present application, terminal device 100 may include more or less components than illustrated, or may combine certain components, or different components, such as may also include a graphics processor, etc. The illustrated components may be implemented in hardware, software, or a combination of software and hardware.
As shown in fig. 2, the battery control circuit 200 provided in the embodiment of the present application includes a control module 210 and a voltage transformation module 220, where the voltage transformation module 220 includes a first voltage reduction unit 221 and a second voltage reduction unit 222, and the control module 210 is connected to the first voltage reduction unit 221 and the second voltage reduction unit 222 respectively;
the control module 210 is configured to be connected to the battery 111, and send a first discharge signal to the first step-down unit 221 when the output voltage of the battery 111 is greater than or equal to a preset output voltage; when the output voltage of the battery 111 is smaller than the preset output voltage, a second discharging signal is sent to the second step-down unit 222;
the first step-down unit 221 is configured to be connected to the battery 111 and the load 120, and step-down the output voltage according to the first discharge signal and a preset step-down multiple, so as to obtain a first discharge voltage and output the first discharge voltage to the load 120;
the second step-down unit 222 is configured to be connected to the battery 111 and the load 120, obtain a variable step-down multiple according to a second discharge signal, step down the output voltage, obtain a second discharge voltage, and output the second discharge voltage to the load 120;
wherein, the variable step-down multiple is determined according to the output voltage of the battery 111 and the operating voltage of the load 120, and the variable step-down multiple is smaller than a preset step-down multiple.
In an application, the voltage transformation module 220 may include at least one voltage reduction unit, each voltage reduction unit including at least one voltage reduction device. The voltage reduction device can be different types of voltage reduction devices such as a voltage reduction type DC/DC converter (Direct Current-Direct Current Converter), a voltage reduction capacitor, a resistance-capacitance voltage reduction device, a Current limiting resistor or a voltage reduction integrated chip, and the like, and the different voltage reduction devices can reduce voltage according to corresponding voltage reduction multiples, or the voltage reduction multiples of the voltage reduction devices can be adjusted according to actual needs; so as to realize flexible depressurization effect. Specifically, the voltage transformation module 220 may include a first voltage reduction unit 221 and a second voltage reduction unit 222, where a preset voltage reduction multiple of the first voltage reduction unit 221 is a preset constant, and a variable voltage reduction multiple of the second voltage reduction unit 222 may be adjusted in real time according to the current output voltage of the battery 111 and the operating voltage of the load 120.
In application, the first voltage reducing unit 221 may be a Charge Pump (Charge Pump), and may increase the voltage reducing speed by a fixed voltage reducing multiple, reduce the loss generated by voltage reduction, and increase the discharge efficiency of the battery 111. The second voltage reducing unit 222 may be a voltage reducing multiple adjustable charge pump, for example, a multi-capacitor charge pump, including multiple groups of sub-charge pumps with different capacitor combinations (with different capacitor sizes), where each group of sub-charge pumps can implement different voltage reducing multiple, and can conveniently adjust the voltage reducing multiple, reduce the loss generated by voltage reducing, and improve the discharge efficiency of the battery 111.
In an application, the control module 210 may be connected to each buck unit of the buck module. The control module 210 may be directly connected to the battery 111 or connected to the battery 111 through an electricity meter, and the control module 210 may read parameters of the battery 111, including the number of cells of the battery 111, the output voltage of the battery 111, and the like. The control module 210 may be a central processing unit, but may also be other general purpose processors, digital signal processors, application specific integrated circuits, off-the-shelf programmable gate arrays or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, or the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The control module 210 may be connected to the processor 10 of the terminal device, or may directly multiplex the processor 10 of the terminal device 100.
In application, the control module 210 may determine a discharge mode based on the output voltage of the battery 111, and may include a high voltage discharge mode and a low voltage discharge mode to adjust the adjustment strategy for the output voltage of the battery 111. Specifically, when the output voltage of the battery 111 is greater than or equal to the preset output voltage, it indicates that the current output voltage of the battery 111 is higher, the load 120 may be powered by the high-voltage discharging mode, and the first discharging signal is sent to the first step-down unit 221; when the output voltage of the battery 111 is smaller than the preset output voltage, it indicates that the current output voltage of the battery 111 is lower, and the load 120 may be powered by the low-voltage discharging mode, and the second discharging signal is sent to the second step-down unit 222.
In application, when the first voltage step-down unit 221 receives the first discharge signal, the output voltage may be stepped down according to the first discharge signal and a preset step-down multiple, so as to obtain a first discharge voltage and output the first discharge voltage to the load 120. The preset voltage reduction multiple may be stored in the first voltage reduction unit 221 in advance, or may be sent to the first voltage reduction unit 221 through the control module 210, or may be carried with the preset voltage reduction multiple through the first discharge signal and sent to the first voltage reduction unit 221; the preset voltage reduction multiple may be set according to the number of the electric cores, specifically, the preset voltage reduction multiple may be equal to the number of the electric cores, for example, the preset voltage reduction multiple is 1 when the number of the electric cores is 1, that is, the output voltage is not reduced, the preset voltage reduction multiple is 2 when the number of the electric cores is 2, that is, the first discharge voltage is equal to 1/2 of the output voltage, and the preset voltage reduction multiple is 3 when the number of the electric cores is 3, that is, the first discharge voltage is equal to 1/3 of the output voltage; or, the preset voltage reduction multiple may be equal to the number of the electric cores multiplied by the preset conversion multiple, for example, when the preset conversion multiple is 0.8 and the number of the electric cores is 2, the preset voltage reduction multiple is 1.6, and the setting mode or the specific size of the preset voltage reduction multiple is not limited in the embodiment of the present application.
In application, when the second voltage step-down unit 222 receives the second discharge signal, the variable voltage step-down multiple may be obtained according to the second discharge signal and the output voltage is stepped down, so as to obtain the second discharge voltage and output the second discharge voltage to the load 120. The second step-down unit 222 may obtain a variable step-down multiple when receiving the second discharge signal, or the control module 210 may obtain the variable step-down multiple when generating the second discharge signal and send the variable step-down multiple to the second step-down unit 222; the magnitude of the variable step-down multiple may be determined according to the output voltage of the battery 111 and the working voltage of the load 120, and specifically, after the output voltage is stepped down by the variable step-down multiple to obtain the second discharge voltage, the second discharge voltage needs to satisfy the highest working voltage smaller than the load 120 and be greater than the lowest working voltage of the load 120.
In one embodiment, the control module 210 is further configured to determine the range of values of the variable step-down multiple according to a minimum operating voltage of the load 120, a maximum operating voltage of the load 120, a minimum output voltage of the battery 111, and a maximum output voltage of the battery 111.
In application, the control module 210 may determine the value range of the variable step-down multiple according to the working voltage range of the load 120 and the output voltage range of the battery 111, so as to determine the variable step-down multiple according to the value range, where the calculation formula of the value range may be:
Wherein V is smin Representing the lowest operating voltage of load 120, V smax Representing the highest operating voltage, V, of load 120 bmin Represents the lowest output voltage of battery 111, V bmax Represents the highest output voltage of the battery 111, and K represents a variable step-down multiple.
In application, the minimum variable step-down multiple may be obtained according to the minimum operating voltage of the load 120 and the minimum output voltage of the battery 111, and the maximum variable step-down multiple may be obtained according to the maximum operating voltage of the load 120 and the maximum output voltage of the battery 111, so that the value range of the variable step-down multiple may be obtained according to the minimum variable step-down multiple and the maximum variable step-down multiple. After the variable depressurization multiple is obtained, the control module 210 or the second depressurization unit 222 may determine whether the variable depressurization multiple is within the range of the variable depressurization multiple, if so, output the variable depressurization multiple, and if not, re-obtain the variable depressurization multiple until the variable depressurization multiple is within the range of the variable depressurization multiple. After the variable step-down multiple is obtained by screening according to the value range of the variable step-down multiple, the variable step-down multiple needs to satisfy the step-down of the output voltage to obtain the second discharge voltage, and the second discharge voltage is smaller than the highest working voltage of the load 120 and larger than the lowest working voltage of the load 120, and if the second discharge voltage cannot satisfy the second discharge voltage, the variable step-down multiple is obtained again.
Assuming that the battery 111 is a dual-cell battery formed by connecting two cells in series, the output voltage interval of the dual-cell battery is 6V to 9V, the working voltage interval of the load 120 is 3.4V to 5V, the preset output voltage is 6.8V, the preset voltage reduction multiple is equal to the number of the cells and is 2, the value range of the variable voltage reduction multiple is more than 17/30 and less than 9/5, when the output voltage of the dual-cell battery is 7V (more than the preset output voltage of 6.8V), the control module 210 sends a first discharge signal to the first voltage reduction unit 221, the first voltage reduction unit 221 reduces the voltage according to the first discharge signal and the preset voltage reduction multiple, and the obtained first discharge voltage is 3.5V; when the output voltage of the dual-cell battery is 6.6V (less than the preset output voltage of 6.8V), the control module 210 sends a second discharge signal to the second voltage reduction unit 222, the variable voltage reduction multiple may be 17/30, and the second voltage reduction unit 222 reduces the voltage according to the second discharge signal and the variable voltage reduction multiple, so that the obtained second discharge voltage is 3.74V.
The preset output voltage may be set according to the minimum working voltage and the number of the electric cores of the load 120 (for example, the minimum working voltage of the load 120 is 3.4V, the number of the electric cores is 2, and the minimum working voltage and the number of the electric cores of the load 120 may be multiplied to obtain the preset output voltage 6.8V), which is not limited in the embodiment of the present application.
In application, the battery control circuit 200 includes a control module 210 and a voltage transformation module 220, the voltage transformation module 220 includes a first voltage reduction unit 221 and a second voltage reduction unit 222, when the output voltage of the battery 111 is higher, the first voltage reduction unit 221 reduces the output voltage according to a preset voltage reduction multiple, so that the voltage reduction can be quickly and conveniently completed, when the output voltage of the battery 111 is lower, the second voltage reduction unit 222 can adjust a variable voltage reduction multiple according to the current output voltage of the battery 111 and the working voltage of the load 120, so as to flexibly determine the voltage reduction multiple according to the actual working condition, so that when the first discharge voltage and the second discharge voltage are used for supplying power to the load 120, the working stability of the load 120 can be ensured, and the suitability of the battery 111 and the load 120 and the electricity use safety of the battery 111 are improved; and by integrating the first voltage dropping unit 221 and the second voltage dropping unit 222 in the voltage transformation module 220, the area of the voltage transformation element in the battery control circuit 200 is reduced, and wires used when the voltage transformation element is arranged are reduced, the integration level and wiring flexibility of the battery control circuit 200 can be improved and the production cost can be reduced.
As shown in fig. 3, in one embodiment, based on the embodiment corresponding to fig. 2, the device further includes a charging port 230 and a charging/discharging module 240, the transforming module 220 further includes a transforming unit 223 and a boosting unit 224, and the charging/discharging module 240 is respectively connected with the charging port 230, the control module 210, the transforming unit 223 and the boosting unit 224;
The charging port 230 is used for connecting with the power supply device 300 to access the power supply voltage output by the power supply device 300;
the control module 210 is configured to:
is connected to the battery 111;
when the power supply device 300 supports a preset fast charge protocol and the output voltage of the battery 111 is greater than or equal to the preset output voltage, sending a fast charge signal to the charge-discharge module 240;
when the power supply device 300 does not support the preset fast charge protocol and the output voltage of the battery 111 is greater than or equal to the preset output voltage, transmitting a normal charge signal to the charge-discharge module 240;
when the output voltage of the battery 111 is less than the preset output voltage, a precharge signal is sent to the charge-discharge module 240;
the charge and discharge module 240 is configured to:
is connected to the load 120;
step-down the power supply voltage according to the rapid charging signal, to obtain a first step-down voltage, and output the first step-down voltage to the load 120, or output the first step-down voltage to the load 120 and the transformation unit 223;
step-down the power supply voltage according to the normal charging signal to obtain a second step-down voltage, and outputting the second step-down voltage to the load 120, or outputting the second step-down voltage to the load 120 and the step-up unit 224;
step-down the power supply voltage according to the precharge signal to obtain a third step-down voltage, and outputting the third step-down voltage to the load 120, or to the load 120 and the step-up unit 224;
The voltage transformation unit 223 is configured to be connected to the battery 111, and when receiving the first reduced voltage, transform the first reduced voltage according to the fast charging transformation multiple to obtain a fast charging voltage and output the fast charging voltage to the battery 111;
the boosting unit 224 is configured to:
is connected to the battery 111;
upon receiving the second reduced voltage, the second reduced voltage is boosted to obtain a normal charging voltage and output to the battery 111;
upon receiving the third step-down voltage, the third step-down voltage is stepped up to obtain a precharge voltage and output to the battery 111;
wherein the third step-down voltage is less than the second step-down voltage, and the third step-down voltage is greater than or equal to the lowest operating voltage of the load 120.
In application, the battery control circuit 200 may further include a charging port 230 and a charging and discharging module 240, where the charging port 230 may be a universal serial bus (Universal Serial Bus, USB) port, a Lightning port (Lightning) or other different types of ports that may be used to charge the terminal device. The charge and discharge module 240 may be an integrated chip (Integrated Circuit, IC) with functions of fast charge, normal charge, precharge, etc., and the specific structure of the charge and discharge module 240 is not limited in this embodiment.
In application, the voltage transformation unit 223 may include at least one voltage boosting device, where the voltage boosting device may be a voltage boosting device of different types such as a voltage boosting DC/DC converter or a voltage boosting integrated chip, and each voltage boosting device may implement different voltage boosting multiples or may adjust the voltage boosting multiples according to actual needs; the boost unit 224 may include at least one boost device, where the boost device may be a boost DC/DC converter, a boost regulator, or a boost integrated chip, and each boost device may implement a different boost multiple, or the boost multiple of the boost device may be adjusted according to actual needs.
In an application, when the charging port 230 is connected to the power supply apparatus 300, the control module 210 may be connected to the charging port 230 and read parameters of the power supply apparatus 300 via the charging port 230; the control module 210 may also read parameters of the power supply device 300 via the charge-discharge module 240, including whether to support a preset fast charge protocol and the magnitude of the power supply voltage; the control module 210 may determine the charging mode according to the magnitude of the output voltage of the battery 111 and whether the power supply device 300 supports a preset fast charge protocol.
In application, when the power supply device 300 supports the preset fast charge protocol and the output voltage of the battery 111 is greater than or equal to the preset output voltage, it indicates that the current output voltage of the battery 111 is high enough and the battery 111 can be charged fast, the control module 210 sends a fast charge signal to the charge/discharge module 240. The charge and discharge module 240, upon receiving the rapid charge signal, steps down the power supply voltage to obtain a first step-down voltage, and outputs the first step-down voltage to the load 120 or to the load 120 and the transformation unit 223. The transforming unit 223 may transform the first reduced voltage according to a fast charge transformation multiple, and the transforming may specifically be increasing the voltage or decreasing the voltage, and may implement fast charging of the battery 111 in a high voltage charging manner when the fast charge voltage is obtained by increasing the voltage, and may implement fast charging of the battery 111 in a high current charging manner when the fast charge voltage is obtained by decreasing the voltage. The embodiment of the application does not limit the specific size of the fast-charging voltage transformation factor and the fast-charging mode of the battery 111.
In application, when the power supply device 300 does not support the preset fast charge protocol and the output voltage of the battery 111 is greater than or equal to the preset output voltage, it indicates that the current output voltage of the battery 111 is high enough and the battery 111 can be normally charged, and the control module 210 sends a normal charging signal to the charging and discharging module 240. The charge-discharge module 240, upon receiving the normal charge signal, steps down the power supply voltage to obtain a second step-down voltage, and outputs the second step-down voltage to the load 120, or outputs the second step-down voltage to the load 120 and the step-up unit 224. The boosting unit 224 may boost the second reduced voltage, and the boosting multiple may be determined according to the number of battery cells of the battery 111, and may specifically be equal to the number of battery cells of the battery 111, so as to match the magnitude of the charging voltage according to the number of battery cells.
In application, when the output voltage of the battery 111 is smaller than the preset output voltage, it indicates that the current output voltage of the battery 111 is too low, and the pre-charge is needed to increase the output voltage, the control module 210 sends a fast charge signal to the charge/discharge module 240. The charge-discharge module 240, upon receiving the precharge signal, steps down the power supply voltage to obtain a third step-down voltage, and outputs the third step-down voltage to the load 120, or outputs the third step-down voltage to the load 120 and the step-up unit 224. The boosting mode of the boosting unit 224 for the third step-down voltage is identical to the boosting mode for the second step-down voltage, and is not described herein, except that the third step-down voltage is smaller than the second step-down voltage, and the corresponding precharge voltage is smaller than the normal charge voltage. It should be noted that the third step-down voltage needs to be greater than or equal to the lowest operating voltage of the load 120, so as to ensure the operating stability of the load 120 when the load 120 is powered by the third step-down voltage.
It should be noted that, when the charge-discharge module 240 obtains the first step-down voltage, the first step-down voltage may be preferentially output to the load 120, so as to ensure power supply of the load 120. When the first step-down voltage is all output to the load 120 to supply power, the first step-down voltage is not output to the transforming unit 223; when the first reduced voltage is not all output to the transformation unit 223 to supply power, the remaining first reduced voltage may be output to the transformation unit 223 to charge the battery 111. The output principle of the second step-down voltage and the third step-down voltage is identical to that of the first step-down voltage, and is not described herein, except that the remaining second step-down voltage and the second step-down voltage are output to the step-up unit 224.
In application, by integrating the boost unit 224 in the voltage transformation module 220, the voltage transformation module 220 can have a boost function on the charging voltage, so that the charging voltage output to the battery 111 can be increased when the multi-cell battery 111 is used, the charging efficiency of the multi-cell battery 111 is improved, the battery control circuit 200 has five charge and discharge functions of quick charge, normal charge, precharge, high-voltage buck and low-voltage buck, and the integration level and wiring flexibility of the battery control circuit 200 are further improved, and the production cost is reduced.
As shown in fig. 4, in an embodiment, based on the embodiment corresponding to fig. 3, the charging port 230 and the direct charging module 250, the transformation module 220 further includes a control unit 225, and the direct charging module 250 is connected to the charging port 230 and the control unit 225, and the control unit 225 is connected to the control module 210, respectively;
the charging port 230 is used for connecting with the power supply device 300 to access the power supply voltage output by the power supply device 300;
the control module 210 is configured to:
is connected to the battery 111;
when the power supply apparatus 300 supports the preset direct charge protocol and the output voltage of the battery 111 is greater than or equal to the preset output voltage, transmitting a direct charge signal to the control unit 225;
The control unit 225 is configured to:
upon receiving the direct charge signal, sending a turn-on signal to the direct charge module 250;
the direct charging module 250 is configured to:
outputting a power supply voltage to the battery 111 according to the on signal;
when the on signal is not received, the output of the power supply voltage to the battery 111 is blocked, and the output voltage of the battery 111 is blocked from being transmitted to the charging port 230.
In application, the selection of the charging port 230 may refer to the related description of the above embodiment, which is not described herein. The direct charging module 250 may be formed by an electronic switch or a component such as a charge pump, and the electronic switch may be a device or a circuit having an electronic switching function, for example, a transistor, a thin film field effect transistor (Thin Film Transistor, TFT) or a composite logic gate circuit, and specifically, may be a metal oxide semiconductor field effect transistor (Metal Oxide Semiconductor Field Effect Transistor, MOSFET).
In application, the control unit 225 may include a buck-boost device, and the selection of the buck-boost device may refer to the related description of the above embodiment, which is not described herein.
In application, when the power supply device 300 supports the preset direct charging protocol and the output voltage of the battery 111 is greater than or equal to the preset output voltage, it indicates that the current output voltage of the battery 111 is high enough and the battery 111 can be directly charged, and the control module 210 sends a direct charging signal to the control unit 225. When receiving the direct charging signal, the control unit 225 may transform the power voltage to obtain a conducting signal, and output the conducting signal to the direct charging module 250. In the terminal device, the maximum voltage output by the control module 210 is typically 5V, and the voltage (e.g. 12V) of the on signal for controlling the operation of the direct charging module 250 is typically higher than the maximum voltage that can be output by the control module 210, so that the control stability of the direct charging module 250 can be improved by generating the on signal by the control unit 225, thereby improving the operation stability of the battery control circuit 200.
In application, the direct charging module 250 may be turned on when receiving the on signal, receive the power voltage and output the power voltage to the battery 111 to perform direct charging on the battery 111; when receiving the on signal, the battery 111 is disconnected, the output of the power supply voltage is blocked, the battery 111 is prevented from being charged rapidly when the output voltage of the battery 111 is smaller than the preset output voltage, so that the power consumption risks of rapid temperature rise, leakage, explosion and the like of the battery 111 are reduced, the output voltage of the battery 111 is blocked from being reversely output to the charging port 230, the charging port 230 is prevented from generating electric leakage, and the power consumption safety is improved.
As shown in fig. 5, in one embodiment, based on the embodiment corresponding to fig. 4, the direct charging module 250 includes a first electronic switch 251 and a second electronic switch 252;
a first end of the first electronic switch 251 is connected with the charging port 230, a second end of the first electronic switch 251 is connected with a first end of the second electronic switch 252, and a control end of the first electronic switch 251 and a control end of the second electronic switch 252 are respectively connected with the control unit 225; a second terminal of the second electronic switch 252 is used for connecting the battery 111;
the first electronic switch 251 is configured to:
upon receipt of the on signal, the supply voltage is sent to the second electronic switch 252;
When the on signal is not received, blocking the power supply voltage from being sent to the second electronic switch 252;
the second electronic switch 252 is for:
upon receiving the on signal, the power supply voltage is received via the first electronic switch 251 and output to the battery 111;
when the on signal is not received, the output voltage of the battery 111 is blocked from being transmitted to the first electronic switch 251.
In application, the control terminal of the first electronic switch 251 and the control terminal of the second electronic switch 252 are used for receiving a conducting signal, the first electronic switch 251 is used for receiving a power supply voltage through the charging port 230 and sending the power supply voltage to the second electronic switch 252 when conducting, and the second electronic switch 252 is used for outputting the power supply voltage to the battery 111 when conducting; the first electronic switch 251 is further used for blocking the power supply voltage from being sent to the second electronic switch 252 when the direct charging module 250 is turned on, and the second electronic switch 252 is further used for blocking the output voltage from being sent to the first electronic switch 251 when the direct charging module 250 is turned off, so that direct charging of the battery 111 is achieved, and bidirectional isolation between the charging port 230 and the battery 111 is achieved when the direct charging module 250 is turned off, and the direct charging module 250 is formed through the first electronic switch 251 and the second electronic switch 252.
As shown in fig. 6, the battery control method provided in the embodiment of the present application is applied to the battery control circuit 200 provided in the above embodiment, and includes the following steps S601 to S605:
step S601, obtaining the output voltage of a battery;
step S602, when the output voltage of the battery is greater than or equal to a preset output voltage, a first discharging signal is sent to a first voltage reduction unit;
step S603, when the output voltage of the battery is smaller than the preset output voltage, sending a second discharging signal to a second step-down unit;
step S604, step down the output voltage by a first step-down unit according to the first discharge signal and a preset step-down multiple to obtain a first discharge voltage and output the first discharge voltage to a load;
step S605, obtaining variable reduction multiples according to a second discharge signal through a second voltage reduction unit, reducing the output voltage to obtain a first discharge voltage and outputting the first discharge voltage to a load;
the variable voltage reduction multiple is determined according to the output voltage of the battery and the working voltage of the load, and is smaller than the preset voltage reduction multiple.
In application, the battery control method provided in step S601 to step S605 may refer to the related functional descriptions of the control module, the first voltage reduction unit and the second voltage reduction unit, which are not described herein.
As shown in fig. 7, in one embodiment, based on the embodiment corresponding to fig. 6, the following steps S701 to S706 are included:
step S701, obtaining the output voltage of the battery
Step S702, when the output voltage of the battery is greater than or equal to a preset output voltage, a first discharging signal is sent to a first voltage reduction unit;
step S703, when the output voltage of the battery is smaller than the preset output voltage, sending a second discharge signal to a second step-down unit;
step S704, step down the output voltage by a first step-down unit according to the first discharge signal and a preset step-down multiple to obtain a first discharge voltage and output the first discharge voltage to a load;
step S705, determining a value range of the variable step-down multiple according to the lowest operating voltage of the load, the highest operating voltage of the load, the lowest output voltage of the battery, and the highest output voltage of the battery.
In one embodiment, the calculation formula for determining the value range of the variable depressurization multiple is:
wherein V is smin Representing the lowest operating voltage of the load, V smax Representing the highest operating voltage of the load, V bmin Representing the lowest output voltage of the battery, V bmax Represents the highest output voltage of the battery, and K represents a variable step-down multiple.
Step S706, obtaining a variable step-down multiple according to the second discharge signal through the second step-down unit, and step-down the output voltage to obtain a first discharge voltage and output the first discharge voltage to the load.
In application, the battery control method provided in step S701 to step S706 may refer to the above-mentioned control module, the related function descriptions of the first step-down unit and the second step-down unit, which are not described herein again.
As shown in fig. 8, a terminal device 100 provided in the embodiment of the present application includes a battery 111, a load 120, and a battery control circuit 200 provided in the foregoing embodiment, where the battery control circuit 200 is connected to the battery 111 and the load 120, respectively, and the battery 111 is formed by connecting at least two electric cores in series.
The number of battery cells of the battery 111 may be set according to an actual operation voltage interval of the load 120, and the embodiment of the present application does not make any limitation on the number of battery cells of the battery 111.
It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-described division of the functional modules is illustrated, and in practical application, the above-described functional allocation may be performed by different functional modules according to needs, i.e. the internal structure of the apparatus is divided into different functional modules to perform all or part of the functions described above. The functional modules in the embodiment may be integrated in one processing module, or each module may exist alone physically, or two or more modules may be integrated in one module, where the integrated modules may be implemented in a form of hardware or a form of software functional modules. In addition, the specific names of the functional modules are only for distinguishing from each other, and are not used for limiting the protection scope of the application. The specific working process of the modules in the above system may refer to the corresponding process in the foregoing method embodiment, which is not described herein again.
In the foregoing embodiments, the descriptions of the embodiments are emphasized, and in part, not described or illustrated in any particular embodiment, reference is made to the related descriptions of other embodiments.
Those of ordinary skill in the art will appreciate that the various illustrative modules and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.
The above embodiments are only for illustrating the technical solution of the present application, and are not limiting; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present application, and are intended to be included in the scope of the present application.
Claims (10)
1. The battery control circuit is characterized by comprising a control module and a voltage transformation module, wherein the voltage transformation module comprises a first voltage reduction unit and a second voltage reduction unit, and the control module is respectively connected with the first voltage reduction unit and the second voltage reduction unit;
the control module is used for being connected with a battery, and sending a first discharging signal to the first voltage reduction unit when the output voltage of the battery is greater than or equal to a preset output voltage; when the output voltage of the battery is smaller than a preset output voltage, a second discharging signal is sent to the second voltage reducing unit;
the first voltage reduction unit is used for being connected with the battery and the load respectively, reducing the output voltage according to the first discharge signal and a preset voltage reduction multiple to obtain a first discharge voltage and outputting the first discharge voltage to the load;
the second voltage reduction unit is used for being connected with the battery and the load respectively, obtaining variable voltage reduction multiples according to the second discharge signals, reducing the output voltage to obtain a second discharge voltage and outputting the second discharge voltage to the load;
the variable voltage reduction multiple is determined according to the output voltage of the battery and the working voltage of the load, and is smaller than the preset voltage reduction multiple.
2. The battery control circuit of claim 1, wherein the control module is further configured to determine the range of values for the variable step-down multiple based on a lowest operating voltage of the load, a highest operating voltage of the load, a lowest output voltage of the battery, and a highest output voltage of the battery.
3. The battery control circuit of claim 1, further comprising a charge port and a charge-discharge module, the transformation module further comprising a transformation unit and a boost unit, the charge-discharge module being connected to the charge port, the control module, the transformation unit and the boost unit, respectively;
the charging port is used for being connected with power supply equipment to access power supply voltage output by the power supply equipment;
the control module is used for:
is connected with the battery;
when the power supply equipment supports a preset fast charge protocol and the output voltage of the battery is greater than or equal to a preset output voltage, sending a fast charge signal to the charge-discharge module;
when the power supply equipment does not support a preset fast charge protocol and the output voltage of the battery is greater than or equal to a preset output voltage, a common charge signal is sent to the charge-discharge module;
When the output voltage of the battery is smaller than a preset output voltage, a precharge signal is sent to the charge-discharge module;
the charging and discharging module is used for:
is connected with the load;
reducing the power supply voltage according to the rapid charging signal to obtain a first reduced voltage, and outputting the first reduced voltage to the load or to the load and the transformation unit;
step-down the power supply voltage according to the common charging signal to obtain a second step-down voltage, and outputting the second step-down voltage to the load or to the load and the step-up unit;
step-down the power supply voltage according to the precharge signal to obtain a third step-down voltage, and outputting the third step-down voltage to the load or to the load and the step-up unit;
the transformation unit is used for being connected with the battery, transforming the first step-down voltage according to the quick charge transformation multiple when the first step-down voltage is received, obtaining the quick charge voltage and outputting the quick charge voltage to the battery;
the boosting unit is used for:
is connected with the battery;
when the second reduced voltage is received, the second reduced voltage is boosted to obtain a common charging voltage and output to the battery;
When the third step-down voltage is received, the third step-down voltage is stepped up to obtain a precharge voltage and output the precharge voltage to the battery;
the third step-down voltage is smaller than the second step-down voltage, and the third step-down voltage is larger than or equal to the lowest working voltage of the load.
4. The battery control circuit of claim 1, further comprising a charging port and a direct charging module, the transformation module further comprising a control unit, the direct charging module being connected to the charging port and the control unit, respectively, the control unit and the control module being connected;
the charging port is used for being connected with power supply equipment to access power supply voltage output by the power supply equipment;
the control module is used for:
is connected with the battery;
when the power supply equipment supports a preset direct charging protocol and the output voltage of the battery is greater than or equal to a preset output voltage, a direct charging signal is sent to the control unit;
the control unit is used for:
when the direct charging signal is received, a conducting signal is sent to the direct charging module;
the direct charging module is used for:
outputting the power supply voltage to the battery according to the conduction signal;
And when the on signal is not received, blocking the power supply voltage from being output to the battery, and blocking the output voltage of the battery from being sent to the charging port.
5. The battery control circuit of claim 4, wherein the direct-charge module comprises a first electronic switch and a second electronic switch;
the first end of the first electronic switch is connected with the charging port, the second end of the first electronic switch is connected with the first end of the second electronic switch, and the control end of the first electronic switch and the control end of the second electronic switch are respectively connected with the control unit; the second end of the second electronic switch is used for being connected with the battery;
the first electronic switch is used for:
when the conduction signal is received, the power supply voltage is sent to the second electronic switch;
when the on signal is not received, the power supply voltage is blocked from being sent to the second electronic switch;
the second electronic switch is used for:
when the on signal is received, the power supply voltage is received through the first electronic switch and is output to the battery;
and when the on signal is not received, blocking the output voltage of the battery from being sent to the first electronic switch.
6. A terminal device comprising a battery, a load and a battery control circuit according to any one of claims 1 to 5, said battery control circuit being connected to said battery and said load, respectively.
7. A battery control method, characterized by being applied to the control module of the battery control circuit according to any one of claims 1 to 5, comprising:
when the output voltage of the battery is greater than or equal to a preset output voltage, a first discharging signal is sent to a first voltage reducing unit;
when the output voltage of the battery is smaller than the preset output voltage, a second discharging signal is sent to a second voltage reducing unit;
the output voltage is reduced by the first voltage reduction unit according to the first discharge signal and a preset voltage reduction multiple, so that a first discharge voltage is obtained and output to a load;
obtaining variable voltage reduction multiples according to the second discharge signals through the second voltage reduction unit, reducing the output voltage to obtain second discharge voltage and outputting the second discharge voltage to a load;
the variable voltage reduction multiple is determined according to the output voltage of the battery and the working voltage of the load, and is smaller than the preset voltage reduction multiple.
8. The battery control method according to claim 7, wherein the step-down unit obtains a variable step-down multiple according to the second discharge signal, and steps down the output voltage to obtain a second discharge voltage and outputs the second discharge voltage to a load, and further comprising:
and determining the value range of the variable voltage reduction multiple according to the lowest working voltage of the load, the highest working voltage of the load, the lowest output voltage of the battery and the highest output voltage of the battery.
9. The battery control method according to claim 8, wherein the calculation formula for determining the value range of the variable step-down multiple is:
wherein V is smin Representing the lowest operating voltage of the load, V smax Representing the highest operating voltage of the load, V bmin Representing the lowest output voltage of the battery, V bmax Represents the highest output voltage of the battery, and K represents a variable step-down multiple.
10. A computer readable storage medium storing a computer program, characterized in that the computer program when executed by a processor implements the steps of the battery control method according to any one of claims 7 to 9.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210654670.XA CN117254540A (en) | 2022-06-10 | 2022-06-10 | Battery control circuit, method, terminal device and storage medium |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210654670.XA CN117254540A (en) | 2022-06-10 | 2022-06-10 | Battery control circuit, method, terminal device and storage medium |
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| CN117254540A true CN117254540A (en) | 2023-12-19 |
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| CN202210654670.XA Pending CN117254540A (en) | 2022-06-10 | 2022-06-10 | Battery control circuit, method, terminal device and storage medium |
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