CN113540585B - Power supply management method - Google Patents
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- CN113540585B CN113540585B CN202110653435.6A CN202110653435A CN113540585B CN 113540585 B CN113540585 B CN 113540585B CN 202110653435 A CN202110653435 A CN 202110653435A CN 113540585 B CN113540585 B CN 113540585B
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- 238000007726 management method Methods 0.000 title claims abstract description 64
- 230000006870 function Effects 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 10
- 230000005540 biological transmission Effects 0.000 claims description 6
- 238000012544 monitoring process Methods 0.000 claims description 6
- 230000006798 recombination Effects 0.000 claims description 6
- 238000005215 recombination Methods 0.000 claims description 6
- 230000008859 change Effects 0.000 claims description 5
- 238000011084 recovery Methods 0.000 claims description 4
- 230000002159 abnormal effect Effects 0.000 claims description 3
- 230000005611 electricity Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000012806 monitoring device Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
- H01M2010/4271—Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
- H01M2010/4278—Systems for data transfer from batteries, e.g. transfer of battery parameters to a controller, data transferred between battery controller and main controller
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Secondary Cells (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a power management method, which comprises the following steps: the power management system of the equipment receives a mark sent by equipment polling, if the received mark is 1, the current battery voltage of the battery pack is read as the highest voltage currently available for the battery pack, and the highest voltage is written into a memory to be temporarily stored as temporary storage voltage; if the received mark is 0, reading the current battery voltage of the battery pack and judging whether the current battery voltage is greater than the preset maximum limit voltage of the battery pack, if so, stopping charging the battery pack; if not, judging whether the current voltage of the battery pack is larger than the temporary storage voltage written when the mark '1' is polled at the previous moment, if so, taking the battery voltage of the battery pack read when the mark is '0' as the highest current available voltage of the battery pack and updating the temporary storage voltage; if not, switching to a power management flow; and repeatedly executing the steps to realize the power management of the equipment. The invention realizes the effective management of the power supply of the equipment.
Description
Technical Field
The invention relates to the technical field of power management, in particular to a power management method.
Background
Power management refers to how power is effectively allocated to different components of a device or system. Power management is critical to battery powered devices, and an excellent power management system can extend battery life by a factor of two to three by reducing the power consumption when the components are idle. Some safety monitoring devices such as the electricity consumption peak of a vehicle speed measuring device usually send speed measuring data, after the data transmission is completed, the speed measuring device enters a standby state, the power consumption is greatly reduced, and the technical problem to be solved in the industry is urgent at present for how to effectively manage the power supply to the devices with the electricity consumption peak and the electricity consumption peak, and prevent battery feeding so as to prolong the service life of the battery.
Disclosure of Invention
The invention aims to realize effective management of power supply of equipment with high and low power consumption peaks, prevent battery feed and prolong the service life of a battery, and provides a power supply management method.
To achieve the purpose, the invention adopts the following technical scheme:
the power management method comprises the following steps:
1) The device's power management system receives the device's poll transmitted flag,
if the received mark is 1, reading the current battery voltage of the battery pack as the highest voltage currently available for the battery pack and writing the highest voltage into a memory to temporarily store the highest voltage as temporary storage voltage;
if the received mark is 0, the step 2) is carried out;
2) Reading the current battery voltage of the battery pack and judging whether the current battery voltage is greater than the preset maximum limit voltage of the battery pack,
if yes, stopping charging the battery pack;
if not, turning to the step 3);
3) Judging whether the current voltage of the battery pack is larger than the temporary storage voltage written when the mark '1' is polled at the last moment,
if yes, taking the battery cell voltage read in the step 2) as the highest voltage currently available for the battery and updating the temporary storage voltage;
if not, switching to a power management flow;
4) And repeatedly executing the steps 1) -3), and realizing power management of the equipment.
As a preferable mode of the present invention, if the polling interval time from "0" to "1" of the flag is longer than 60s and the current battery voltage of the battery pack is always longer than the temporary voltage written when "1" was last polled in the polling interval time, the voltage value of the current battery voltage of the battery pack read in the step 2) is stored in the EEPROM memory.
As a preferred solution of the present invention, if the current battery voltage of the battery pack read in the step 2) is greater than the safety voltage and less than or equal to the temporary storage voltage, the power management flow in the step 3) is as follows:
monitoring the current battery voltage of the battery pack in real time;
if the current battery voltage of the battery pack read in the step 2) is greater than the minimum voltage and less than or equal to the safety voltage, the power management flow in the step 3) includes the steps of:
3.1 a) determining whether the battery packs have been grouped,
if yes, go to step 3.2 a);
if not, separating the battery pack into an output pack and a standby pack, and then transferring to the step 3.2 a);
3.2 a) charging the standby group, and monitoring the output voltage of the output group in real time;
3.3 a) switching or recombining the functions of the output group and the standby group into the battery group according to the voltage change of the output group and the standby group.
As a preferred aspect of the present invention, if the current battery voltage of the battery pack read in the step 2) is less than or equal to a minimum voltage, the power management procedure in the step 3) includes the steps of:
3.1 b) determining whether the battery packs have been grouped into a standby pack and an output pack,
if yes, go to step 3.2 b);
if not, generating abnormal alarm information of the battery and continuously alarming;
3.2 b) judging whether the battery voltage of the standby group is less than or equal to the minimum voltage,
if yes, generating stop alarm information and continuously alarming;
if not, turning to the step 3.3 b);
3.3 b) generating shutdown early warning information and early warning, and then carrying out function switching or recombination on the output group and the standby group into the battery group according to the voltage change of the standby group and the output group.
As a preferred embodiment of the present invention, the method for performing function switching or recombination between the output group and the standby group into the battery group includes:
when the standby group is charged to a safe voltage of which the battery voltage is larger than the lowest voltage and smaller than or equal to the battery voltage, the standby group is used as the output group to supply power for the equipment, and the output group is used as the standby group to charge;
and when the battery voltage of the standby group is larger than the safety voltage of the battery group and the voltage difference between the battery voltages of the standby group and the output group is smaller than a preset voltage difference threshold value, recombining the standby group and the output group into the battery group to supply power for the equipment, and generating power supply recovery information to prompt a user.
As a preferred embodiment of the present invention, the safety voltage of the battery pack is calculated by the following formula (1):
a=b+cx2 formula (1)
In formula (1), a represents the safety voltage;
b represents a minimum limit voltage of the battery pack;
c represents a single power consumption voltage of the device per transmission of data.
As a preferable embodiment of the present invention, the minimum voltage is calculated by the following formula (2):
d=b+c formula (2)
In formula (2), D represents the minimum voltage;
b represents a minimum limit voltage of the battery pack;
c represents a single power consumption voltage at each time the device transmits data.
As a preferable mode of the present invention, the single power consumption voltage is a battery voltage difference of the battery pack before and after the device transmits data.
The invention realizes the effective management of the power supply of the equipment with the peak and the low power consumption, can avoid the power supply of the power supply battery, and is beneficial to prolonging the service life of the battery.
Drawings
In order to more clearly illustrate the technical solution of the embodiments of the present invention, the drawings that are required to be used in the embodiments of the present invention will be briefly described below. It is evident that the drawings described below are only some embodiments of the present invention and that other drawings may be obtained from these drawings without inventive effort for a person of ordinary skill in the art.
FIG. 1 is a diagram showing steps for implementing a power management method according to an embodiment of the present invention;
FIG. 2 is a flow chart of a power management method according to an embodiment of the present invention;
FIG. 3 is a flowchart of a power management process according to an embodiment of the present invention;
FIG. 4 is a second flowchart of power management according to an embodiment of the present invention;
FIG. 5 is a third power management flow chart provided by an embodiment of the present invention;
FIG. 6 is a fourth flowchart of power management provided by an embodiment of the present invention;
FIG. 7 is a flow chart I of power management initialization for a new device;
FIG. 8 is a second flowchart of power management initialization for an old device;
FIG. 9 is a flow chart for calculating and storing results for power consumption of a device;
fig. 10 is a flow chart for querying and controlling the battery status of a device.
Detailed Description
The technical scheme of the invention is further described below by the specific embodiments with reference to the accompanying drawings.
Wherein the drawings are for illustrative purposes only and are shown in schematic, non-physical, and not intended to be limiting of the present patent; for the purpose of better illustrating embodiments of the invention, certain elements of the drawings may be omitted, enlarged or reduced and do not represent the size of the actual product; it will be appreciated by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The same or similar reference numbers in the drawings of embodiments of the invention correspond to the same or similar components; in the description of the present invention, it should be understood that, if the terms "upper", "lower", "left", "right", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, only for convenience in describing the present invention and simplifying the description, rather than indicating or implying that the apparatus or elements being referred to must have a specific orientation, be constructed and operated in a specific orientation, so that the terms describing the positional relationships in the drawings are merely for exemplary illustration and should not be construed as limiting the present patent, and that the specific meaning of the terms described above may be understood by those of ordinary skill in the art according to specific circumstances.
In the description of the present invention, unless explicitly stated and limited otherwise, the term "coupled" or the like should be interpreted broadly, as it may be fixedly coupled, detachably coupled, or integrally formed, as indicating the relationship of components; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between the two parts or interaction relationship between the two parts. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
The power management method provided by the embodiment of the invention, as shown in fig. 1 and fig. 2, specifically comprises the following steps:
1) The device's power management system receives the device's poll transmitted flag,
if the received mark is '1' (indicating that the equipment has completed data transmission), the current battery voltage of the battery pack is read as the highest voltage currently available for the battery pack, and the highest voltage is written into a memory as temporary storage voltage;
if the received flag is "0" (indicating that the device is not transmitting data), the step 2) is shifted to;
step 2) reading the current battery voltage of the battery pack and judging whether the current battery voltage is greater than the preset maximum limit voltage (preferably 4.2V) of the battery pack,
if yes, stopping charging the battery pack;
if not, turning to the step 3);
step 3) judging whether the current voltage of the battery pack is greater than the temporary voltage written when the flag "1" is polled at the previous time (i.e. "highest voltage" in fig. 3),
if yes, taking the battery cell voltage read in the step 2) as the highest voltage currently available for the battery, and updating the temporary storage voltage written in the step 1) by using the highest voltage;
if not, switching to a power management flow;
step 4) repeatedly executing the steps 1) -3), and realizing power management of the equipment.
Here, since the battery pack may be continuously charged during the flag polling time interval, when the current time (flag "0") is polled from the previous time (flag "1"), the battery pack voltage acquired at the current time may be greater than the temporary voltage written at the previous polling time.
Since some burst states such as a sudden power failure may cause the memory data (the temporary voltage temporarily stored in the memory) to be cleared, resulting in the failure to implement the subsequent power management procedure, preferably, if the polling interval time of the flag from "0" to "1" is greater than 60s and the current battery voltage of the battery pack is always greater than the temporary voltage written when "1" was last polled in the polling interval time of 60s, the voltage value of the current battery voltage of the battery pack read in step 2) (preferably, the maximum battery voltage value read in the polling interval time or the average value of the battery voltage values read a plurality of times) is stored in the EEPROM memory. The power management system will directly flush the EEPROM memory to obtain the stored battery voltage value if the burst state occurs to cause the memory data to be cleared.
The following specifically describes a power management method provided by the present invention:
if the current battery voltage of the battery pack read in step 2) is greater than the safety voltage and less than or equal to the temporary storage voltage, as shown in fig. 3, the power management flow in step 3) is as follows: continuously monitoring the current battery voltage of the battery pack in real time;
if the current battery voltage of the battery pack read in step 2) is greater than the minimum voltage and less than or equal to the safety voltage, as shown in fig. 4, the power management flow in step 3) includes:
step 3.1 a) judging whether the battery packs are grouped;
if yes, go to step 3.2 a);
if not, the battery pack is separated into an output pack and a standby pack, and then the step 3.2 a) is carried out, after the battery pack is separated, the standby pack does not supply power to the equipment any more, and the output pack continues to supply power;
step 3.2 a), charging the standby group, and monitoring output voltage of the output group in real time;
step 3.3 a) switching or recombining the functions of the output group and the standby group into a battery group according to the voltage change of the output group and the standby group.
If the current battery voltage of the battery pack read in step 2) is less than or equal to the minimum voltage, as shown in fig. 5, the power management flow in step 3) includes the following steps:
step 3.1 b) determines whether the battery packs have been grouped into a standby pack and an output pack,
if yes, go to step 3.2 b);
if not, generating abnormal alarm information of the battery and continuously alarming;
step 3.2 b) judging whether the battery voltage of the standby group is less than or equal to the lowest voltage,
if yes, generating stop alarm information and continuously alarming;
if not, turning to the step 3.3 b);
and 3.3 b) generating shutdown early warning information and early warning, and then carrying out function switching or recombination on the output group and the standby group into a battery group according to the voltage change of the standby group and the output group.
The process of switching or recombining the output and standby groups into a battery set as described in step 3.3 a) or step 3.3 b) is specifically described below:
as shown in fig. 4, 5 and 6, the method for switching or recombining the functions of the output group and the standby group into the battery group according to the present invention comprises the following steps:
when the standby group is charged to a safe voltage of which the battery voltage is larger than the lowest voltage and smaller than or equal to the battery voltage, the standby group is used as an output group to supply power for equipment, and the output group is used as the standby group to charge, so that the function switching of the output group and the standby group is realized.
And when the battery voltage of the standby group is larger than the safety voltage of the battery group and the voltage difference between the battery voltages of the standby group and the output group is smaller than a preset voltage difference threshold value, recombining the standby group and the output group into the battery group to supply power for the equipment, and generating power supply recovery information to prompt a user.
Fig. 9 shows a flowchart of calculating power consumption of a device and storing a calculation result according to an embodiment of the present invention. In the embodiment of the invention, the safety voltage of the battery pack is calculated by the following formula (1):
a=b+cx2 formula (1)
In the formula (1), a represents a safety voltage;
b represents the minimum limit voltage of the battery pack;
c represents a single power consumption voltage of the device per transmission of data.
The minimum voltage described above is calculated by the following formula (2):
d=b+c formula (2)
In the formula (2), D represents the lowest voltage;
b represents the minimum limit voltage of the battery pack;
c represents a single power consumption voltage every time the device transmits data.
The single power consumption voltage in the formula (1) and the formula (2) is a battery voltage difference of the battery pack before and after the device transmits data.
The following briefly describes the method of initializing a power management system according to the present invention:
initializing the power management system includes initializing the power management system of the new device and initializing the power management system of the old device. As shown in fig. 1 and 2, the difference between initializing the new device and the old device is that initializing the new device is writing initialization data into the EEPROM memory and the memory with empty data, and initializing the old device is writing initialization data into the EEPROM memory and the memory with non-empty data, wherein the initialization data includes the highest voltage of the battery pack, the charging time, the single power consumption of the device transmitting data, the safe voltage, the data transmitting flag, the temporary storage voltage, the power management start time, the battery start state, and the like.
Fig. 10 shows a flowchart of the invention for querying and controlling the battery status of a device. When the power management system receives the query command '0 x 01', the power management system returns the queried highest voltage, charging time, single power consumption and safe voltage of the battery pack. For another example, when the power management system receives the control command "0x10", the power management system turns off the main power supply to the device (for example, turns off the power supply to the main functional modules of the device, such as the data transmission module and the data acquisition module), and retains the power supply to the MCU of the device (for example, in the sleep mode of the device, only retains the power supply to the singlechip of the device).
It should be understood that the above description is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be apparent to those skilled in the art that various modifications, equivalents, variations, and the like can be made to the present invention. However, such modifications are intended to fall within the scope of the present invention without departing from the spirit of the present invention. In addition, some terms used in the specification and claims of the present application are not limiting, but are merely for convenience of description.
Claims (6)
1. A method of power management, comprising the steps of:
1) The device's power management system receives the device's poll transmitted flag,
if the received mark is 1, reading the current battery voltage of the battery pack as the highest voltage currently available for the battery pack and writing the highest voltage into a memory to temporarily store the highest voltage as temporary storage voltage;
if the received mark is 0, the step 2) is carried out;
2) Reading the current battery voltage of the battery pack and judging whether the current battery voltage is greater than the preset maximum limit voltage of the battery pack,
if yes, stopping charging the battery pack;
if not, turning to the step 3);
3) Judging whether the current voltage of the battery pack is larger than the temporary storage voltage written when the mark '1' is polled at the last moment,
if yes, taking the battery cell voltage read in the step 2) as the highest voltage currently available for the battery and updating the temporary storage voltage;
if not, switching to a power management flow;
4) Repeatedly executing the steps 1) -3), and realizing power management of the equipment;
if the current battery voltage of the battery pack read in the step 2) is greater than the safety voltage and less than or equal to the temporary storage voltage, the power management flow in the step 3) is as follows:
monitoring the current battery voltage of the battery pack in real time;
if the current battery voltage of the battery pack read in the step 2) is greater than the minimum voltage and less than or equal to the safety voltage, the power management flow in the step 3) includes the steps of:
3.1 a) determining whether the battery packs have been grouped,
if yes, go to step 3.2 a);
if not, separating the battery pack into an output pack and a standby pack, and then transferring to the step 3.2 a);
3.2 a) charging the standby group, and monitoring the output voltage of the output group in real time;
3.3 a) switching or recombining the functions of the output group and the standby group into the battery group according to the voltage changes of the output group and the standby group;
the method for performing function switching or recombination on the output group and the standby group into the battery group comprises the following steps:
when the standby group is charged to a safe voltage of which the battery voltage is larger than the lowest voltage and smaller than or equal to the battery voltage, the standby group is used as the output group to supply power for the equipment, and the output group is used as the standby group to charge;
and when the battery voltage of the standby group is larger than the safety voltage of the battery group and the voltage difference between the battery voltages of the standby group and the output group is smaller than a preset voltage difference threshold value, recombining the standby group and the output group into the battery group to supply power for the equipment, and generating power supply recovery information to prompt a user.
2. A power management method is characterized in that 1) a power management system of a device receives a flag sent by a device poll,
if the received mark is 1, reading the current battery voltage of the battery pack as the highest voltage currently available for the battery pack and writing the highest voltage into a memory to temporarily store the highest voltage as temporary storage voltage;
if the received mark is 0, the step 2) is carried out;
2) Reading the current battery voltage of the battery pack and judging whether the current battery voltage is greater than the preset maximum limit voltage of the battery pack,
if yes, stopping charging the battery pack;
if not, turning to the step 3);
3) Judging whether the current voltage of the battery pack is larger than the temporary storage voltage written when the mark '1' is polled at the last moment,
if yes, taking the battery cell voltage read in the step 2) as the highest voltage currently available for the battery and updating the temporary storage voltage;
if not, switching to a power management flow;
4) Repeatedly executing the steps 1) -3), and realizing power management of the equipment;
if the current battery voltage of the battery pack read in the step 2) is less than or equal to the minimum voltage, the power management flow in the step 3) includes the steps of:
3.1 b) determining whether the battery packs have been grouped into a standby pack and an output pack,
if yes, go to step 3.2 b);
if not, generating abnormal alarm information of the battery and continuously alarming;
3.2 b) judging whether the battery voltage of the standby group is less than or equal to the minimum voltage,
if yes, generating stop alarm information and continuously alarming;
if not, turning to the step 3.3 b);
3.3 b) generating shutdown early warning information and early warning, and then carrying out function switching or recombination on the output group and the standby group into the battery group according to the voltage change of the standby group and the output group;
the method for performing function switching or recombination on the output group and the standby group into the battery group comprises the following steps:
when the standby group is charged to a safe voltage of which the battery voltage is larger than the lowest voltage and smaller than or equal to the battery voltage, the standby group is used as the output group to supply power for the equipment, and the output group is used as the standby group to charge;
and when the battery voltage of the standby group is larger than the safety voltage of the battery group and the voltage difference between the battery voltages of the standby group and the output group is smaller than a preset voltage difference threshold value, recombining the standby group and the output group into the battery group to supply power for the equipment, and generating power supply recovery information to prompt a user.
3. The power management method according to claim 1 or 2, wherein if the polling interval time of the flag from "0" to "1" is greater than 60s and the current battery voltage of the battery pack is always greater than the temporary voltage written when "1" was last polled during the polling interval time, the voltage value of the current battery voltage of the battery pack read in the step 2) is stored in an EEPROM memory.
4. The power management method according to claim 1, wherein the safety voltage of the battery pack is calculated by the following formula (1):
a=b+c×2 formula (1)
In formula (1), a represents the safety voltage;
b represents a minimum limit voltage of the battery pack;
c represents a single power consumption voltage of the device per transmission of data.
5. The power management method according to claim 1, wherein the minimum voltage is calculated by the following formula (2):
d=b+c formula (2)
In formula (2), D represents the minimum voltage;
b represents a minimum limit voltage of the battery pack;
c represents a single power consumption voltage at each time the device transmits data.
6. The power management method according to claim 4 or 5, wherein the single power consumption voltage is a battery voltage difference of the battery pack before and after the device transmits data.
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