CN110325868A - The electric quantity of power supply management method and system of electric tool - Google Patents
The electric quantity of power supply management method and system of electric tool Download PDFInfo
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- CN110325868A CN110325868A CN201880013401.7A CN201880013401A CN110325868A CN 110325868 A CN110325868 A CN 110325868A CN 201880013401 A CN201880013401 A CN 201880013401A CN 110325868 A CN110325868 A CN 110325868A
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- 238000007726 management method Methods 0.000 title claims abstract description 24
- 238000004364 calculation method Methods 0.000 claims abstract description 44
- 238000000034 method Methods 0.000 claims description 60
- 230000008859 change Effects 0.000 claims description 17
- 238000009333 weeding Methods 0.000 claims description 10
- 238000004891 communication Methods 0.000 claims description 8
- 230000010354 integration Effects 0.000 claims description 6
- 238000005553 drilling Methods 0.000 claims description 5
- 239000002699 waste material Substances 0.000 abstract description 4
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- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 3
- 238000007664 blowing Methods 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 229910052744 lithium Inorganic materials 0.000 description 3
- 238000013138 pruning Methods 0.000 description 3
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/382—Arrangements for monitoring battery or accumulator variables, e.g. SoC
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
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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
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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
- H01M10/4285—Testing apparatus
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- 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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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
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Abstract
A kind of electric quantity of power supply management method of electric tool, the electric tool include power supply, and Xiang Suoshu electric tool provides electric energy, further includes: obtains the remaining capacity (S1) of power supply；Obtain the load information (S2) when the electric tool operation；The remaining workload (S3) of the power supply is calculated according to the available remaining capacity of the power supply and the load information.The remaining workload of power supply is calculated according to power tool load information, particularly, different calculation methods can be used according to the power consumption type of electric tool, the remaining workload of power supply is more accurately calculated, meanwhile, for different types of electric tool, also selective display remaining working time or remaining working quantity, enough power supply packets are got out convenient for user's plan ahead good berth amount or in advance, the unnecessary time is avoided to waste, improve working efficiency.
Description
The invention belongs to the technical field of electric tools, and particularly relates to a power supply electric quantity management method and system of an electric tool.
The power tool is usually coupled to an external power source, and the power source supplies power to the power tool for operation. The traditional electric tool is not visual enough in the way of displaying the electric quantity, a user can hardly know when to replace the power supply or charge the power supply accurately, inconvenience is brought to the user, and the electric quantity of the traditional power supply is usually obtained by a method of collecting power supply voltage. The power supply capacity obtained by this method is extremely inaccurate.
In the prior art, a remaining operating time display device is disposed on the power pack to display the remaining operating time of the power pack, and an identification device is disposed in the power pack to identify the type of the electric tool coupled to the power pack and calculate the operating time of the power pack for the electric tool. In the prior art, the remaining working time of the power supply pack is calculated according to the type of the electric tool, and the result is inaccurate because even if the electric tool is of the same type, the remaining working time of the power supply is different due to different working conditions during operation, for example, an electric wrench drives a screw, the size of the screw and the material of a plate can influence the load and further influence the remaining working time of the power supply pack, so that the result of calculating the remaining working time of the power supply pack according to the type of the electric tool in the prior art is very inaccurate.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide a power supply electric quantity management method and system of an electric tool, which can accurately calculate the residual working capacity of a power supply according to the load information of the electric tool.
The technical scheme adopted by the invention for solving the problems in the prior art is as follows:
a power supply power management method for a power tool including a power supply that provides power to the power tool, comprising:
acquiring available residual capacity of a power supply;
acquiring load information of the electric tool during operation;
and calculating the residual workload of the power supply according to the available residual capacity of the power supply and the load information.
Preferably, the remaining amount of work includes a remaining work time and a remaining work amount.
Preferably, the method further comprises:
selectively displaying at least one of a remaining operating time and a remaining number of operations of the power supply according to a type of the power tool.
Preferably, the power tool includes at least one of a first power tool in which a change in load with time is insignificant and a second power tool in which a change in load with time is significant.
Preferably, the load information during the operation of the electric tool is acquired; the step of calculating the remaining workload of the power supply according to the available remaining capacity of the power supply and the load information comprises the following steps:
acquiring real-time load information of the first electric tool during operation;
and calculating the residual workload of the power supply according to the available residual capacity and the real-time load information of the power supply.
Preferably, the first electric tool is a weeding tool, and the remaining working quantity is an area where the available remaining capacity of the power supply can maintain weeding of the first electric tool.
Preferably, the load information during the operation of the electric tool is acquired; the step of calculating the remaining workload of the power supply according to the available remaining capacity of the power supply and the load information comprises the following steps:
after the second electric tool is started, recording load information of the second electric tool during operation;
calculating an average load value of the second electric tool during operation according to the recorded load information;
and calculating the remaining working time of the power supply according to the available remaining capacity of the power supply and the average load value.
Preferably, the step of calculating an average load value during the second type of electric power tool operation based on the recorded load information includes:
acquiring recorded real-time load information of the second electric tool in a first working time, and calculating first power consumption in the first working time by adopting an integral method;
acquiring recorded real-time load information of the second type of electric tool in a second working time, and calculating second power consumption in the second working time by adopting an integral method;
calculating the total power consumption in the first working time and the second working time according to the first power consumption and the second power consumption;
and acquiring the total time of the first working time and the second working time, and calculating the average load value of the second electric tool during working according to the total time and the total power consumption.
Preferably, the step of calculating an average load value during operation of the second electric power tool based on the recorded load information includes:
acquiring recorded real-time load information of the second electric tool under a first working condition, and calculating first power consumption of the second electric tool under the first working condition by adopting an integral method;
acquiring recorded real-time load information of the second electric tool under a second working condition, and calculating second power consumption of the second electric tool under the second working condition by adopting an integral method;
calculating the total power consumption under the first working condition and the second working condition according to the first power consumption and the second power consumption;
and acquiring the total time of the first working condition and the second working condition, and calculating the average load value under the first working condition and the second working condition according to the total time and the total power consumption.
Preferably, the load information during the operation of the electric tool is acquired; the step of calculating the remaining workload of the power supply according to the available remaining capacity of the power supply and the load information comprises the following steps:
recording load information of the second electric tool for completing preset operation;
calculating an average load value of the second electric tool when the second electric tool completes preset operation according to the recorded load information;
and calculating the residual work quantity of the power supply according to the available residual capacity of the power supply and the average load value.
Preferably, the step of recording load information of the second electric tool for completing the preset operation, and calculating an average load value of the second electric tool for completing the preset operation according to the recorded load information includes:
recording time and load information of the second type of electric tool from the beginning of preset operation to when the load information meets preset conditions;
calculating the total electric quantity for completing the preset operation by utilizing an integral method according to the time and the load information;
and calculating the average load value when the preset operation is finished according to the time and the total electric quantity.
Preferably, the preset operation includes at least one of drilling, screwing or unscrewing, and the remaining operation number includes at least one of the number of holes drilled by the second power tool, the number of screws screwed or the number of screws unscrewed by the second power tool, which can be maintained by the available remaining power of the power supply.
Preferably, the step of acquiring the available remaining capacity of the power supply comprises:
acquiring the residual capacity of the power supply;
acquiring a manufacturer and historical working condition parameters of the power supply;
calculating the capacity attenuation of the power supply according to the manufacturer of the power supply and the historical working condition parameters;
and calculating the available residual capacity of the power supply according to the residual capacity of the power supply and the capacity attenuation quantity of the power supply.
Preferably, the step of acquiring the available remaining capacity of the power supply further includes:
and recording the discharge current of the power supply, and calculating the capacity attenuation amount of the power supply according to the recorded discharge current.
Preferably, the historical operating condition parameters of the power supply include at least one of the parameters of charge and discharge times, charge multiplying power, charge cut-off voltage, charge current, discharge cut-off voltage and power supply temperature.
Preferably, the method further comprises the following steps:
reading the identification information provided by the identification module of the electric tool to identify the type of the electric tool, and selectively displaying at least one of the remaining working time and the remaining working amount of the power supply according to the type of the electric tool.
Preferably, the method further comprises the following steps:
and communicating with an external device through the identification module of the power supply, and updating the identification information in the identification module.
Preferably, the method further comprises the following steps:
pre-storing the corresponding relation between the historical working condition parameters of the power supply and the capacity attenuation amount;
determining the capacity attenuation amount of the power supply according to the corresponding relation between the historical working condition parameters of the power supply and the capacity attenuation;
and calculating the available residual capacity of the power supply according to the capacity attenuation of the power supply.
Preferably, the step of acquiring the remaining capacity of the power supply includes:
calculating the charging electric quantity of the power supply; the charging capacity of the power supply is equal to the result of time integration of the charging current multiplied by the charging efficiency;
determining the total electric quantity of the power supply according to the electric quantity before the power supply is charged and the charging electric quantity;
calculating the discharge electric quantity of the power supply; the discharge capacity of the power supply is equal to the integral of the discharge current over time;
and determining the residual capacity of the power supply according to the total capacity and the discharge capacity of the power supply.
Preferably, the power source includes a battery pack and a backpack battery pack.
The present invention also provides a power supply power management system for an electric tool, the electric tool including a power supply that supplies electric power to the electric tool, the power supply further including:
the available residual electric quantity acquisition module is used for acquiring the available residual electric quantity of the power supply;
the load information acquisition module is used for acquiring load information of the electric tool during operation;
and the residual operation amount calculation module is respectively connected with the available residual electric quantity acquisition module of the power supply and the load information acquisition module and is used for calculating the residual operation amount of the power supply according to the residual electric quantity and the load information of the power supply.
Preferably, the remaining amount of work includes a remaining work time and a remaining work amount.
Preferably, the power tool further comprises a display module for selectively displaying at least one of the remaining operating time and the remaining number of operations of the power source according to the type of the power tool.
Preferably, the power tool includes at least one of a first power tool in which a change in load with time is insignificant and a second power tool in which a change in load with time is significant.
Preferably, the load information acquiring module is configured to acquire real-time load information of the first electric tool during operation;
the residual workload calculation module is respectively connected with the available residual power acquisition module of the power supply and the load information acquisition module, and calculates the residual workload of the power supply according to the residual power and the real-time load information of the power supply.
Preferably, the first electric tool is a weeding tool, and the remaining working quantity is an area where the available remaining capacity of the power supply can maintain weeding of the first electric tool.
Preferably, the load information acquiring module includes a recording unit, configured to record load information of the second electric tool during operation after the second electric tool is started;
the load information acquisition module further comprises an average load value calculation unit which is used for calculating an average load value of the second electric tool during operation according to the recorded load information;
the residual work amount calculating module is respectively connected with the available residual electric quantity obtaining module of the power supply, the recording unit and the average load value calculating unit, and calculates the residual work time of the power supply according to the residual electric quantity of the power supply and the average load value.
Preferably, the load information acquiring module includes a recording unit, configured to record load information that the second electric tool completes a preset operation;
the load information acquisition module further comprises an average load value calculation unit which is used for calculating an average load value of the second electric tool during operation according to the recorded load information;
the residual work amount calculation module is respectively connected with the available residual electric quantity acquisition module of the power supply, the recording unit and the average load value calculation unit, and calculates the residual work amount of the power supply according to the residual electric quantity and the average load value of the power supply.
Preferably, the preset operation includes at least one of drilling, screwing or unscrewing, and the remaining operation number includes at least one of the number of holes drilled by the second power tool, the number of screws screwed or the number of screws unscrewed by the second power tool, which can be maintained by the available remaining power of the power supply.
Preferably, the method further comprises the following steps:
the residual electric quantity acquisition module is used for acquiring the residual electric quantity of the power supply;
the communication module is used for acquiring the manufacturer and the historical working condition parameters of the power supply stored in the power supply;
and the available residual electric quantity acquisition module of the power supply is used for calculating the available residual electric quantity of the power supply according to the residual electric quantity of the power supply and the historical working condition parameters of the power supply.
Preferably, the power supply further comprises a storage module, which is used for storing the corresponding relation between the manufacturer of the power supply and the historical working condition parameters and the capacity attenuation amount in advance;
the available residual electric quantity obtaining module is used for determining the capacity attenuation quantity of the power supply according to the manufacturer of the power supply and the corresponding relation between the historical working condition parameters and the capacity attenuation, and calculating the available residual electric quantity of the power supply according to the capacity attenuation of the power supply.
Preferably, the electric tool further comprises an identification module for identifying the type of the electric tool.
Preferably, the power source includes a battery pack and a backpack battery pack.
Compared with the prior art, the invention has the beneficial effects that: according to the method, the capacity attenuation of the power supply is calculated according to the historical working condition parameters of the power supply, and the residual capacity of the power supply is corrected, so that the more accurate residual capacity of the power supply is obtained compared with the prior art. According to the method, the residual working time of the power supply is calculated according to the load information of the electric tool, particularly, different calculation methods can be adopted according to the load type of the electric tool, the residual working time and the residual working quantity of the power supply are calculated more accurately, different display modes are adopted for different types of electric tools, particularly, for a second electric tool with obvious load change along with time, the number of preset operation can be completed by calculating the available residual electric quantity, a user can know the condition that the residual electric quantity of the power supply can operate more intuitively, the user can plan the working quantity in advance or prepare enough power supply in advance, unnecessary time waste is avoided, and the working efficiency is improved.
The above objects, technical solutions and advantages of the present invention can be achieved by the following drawings:
fig. 1 is a flowchart illustrating a power management method for an electric tool according to an embodiment of the invention.
Fig. 2 is a detailed flowchart of step S1 in fig. 1.
Fig. 3 is another detailed flowchart of step S11 in fig. 2.
Fig. 4 is a detailed flowchart of fig. 1.
Fig. 5 is a detailed flowchart of step S2 in fig. 1.
Fig. 6 is another detailed flowchart of step S2 in fig. 1.
Fig. 7 is a specific flowchart of step S202 in fig. 5.
Fig. 8 is another specific flowchart of step S202 in fig. 5.
Fig. 9 is another detailed flowchart of step S2 in fig. 1.
Fig. 10 is a functional block diagram of a power supply capacity management system of an electric tool according to an embodiment of the present invention.
Fig. 11 is a flowchart illustrating a power management method for an electric tool according to an embodiment of the invention.
Fig. 12 is a detailed flowchart of step S110 in fig. 11.
Fig. 13 is a functional block diagram of a constant current source of the battery of the electrically powered device of fig. 11.
Fig. 14 is a flowchart of a power supply capacity management method of an electric tool in another embodiment.
Fig. 15 is a functional block diagram of a power supply charge management system of the power tool in one embodiment.
Fig. 16 is a functional block diagram of the remaining power determining module of fig. 15.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Fig. 1 is a flowchart illustrating a power management method of an electric tool according to an embodiment of the invention. The electric tool comprises a mower, a grass trimmer, pruning shears, a blowing and sucking machine, a chain saw, an intelligent mower, a dust collector, an electric drill, an electric hammer, an electric wrench, an angle grinder, an electric circular saw or a reciprocating saw and the like. The electric tool of the present invention can be classified into a first electric tool and a second electric tool according to whether or not the change of the load with time is significant. The invention relates to a power tool, in particular to a power tool, wherein when the power tool such as a mower, a grass trimmer, a pruning shear, a blowing and sucking machine, a chain saw and the like works, the change of load along with time is not obvious, namely the working condition of the power tool is stable, and discontinuous high power cannot be generated. The load of electric tools such as an electric drill, an electric hammer, an electric wrench, an angle grinder, an electric circular saw or a reciprocating saw obviously changes along with time during operation, the working condition is unstable, for example, the current of the electric drill gradually increases in the drilling process, and becomes zero when one hole is completed, and the current is periodically circulated, namely the load of the electric tools obviously changes along with time, namely the second electric tool is the second electric tool.
The electric tool comprises a power supply which supplies electric energy to the electric tool. The power supply electric quantity measuring method of the electric tool comprises the following steps:
step S1: and acquiring the available residual capacity of the power supply. The available residual capacity of the power supply refers to the capacity that the power supply can actually emit, and the battery can have certain loss to the power supply in the charging and discharging process, namely, the power supply can age to a certain extent, so that the residual capacity of the power supply needs to be corrected to obtain more accurate available residual capacity.
Step S2: load information during operation of the electric tool is acquired.
In the invention, a current detection unit is arranged in the electric tool and used for detecting or recording the working current of the electric tool during operation. As will be appreciated by those skilled in the art, the current detection unit may be disposed in the power source, or in other parts of the power tool other than the power source, i.e., in the tool body of the power tool.
Step S3: and calculating the residual work capacity of the power supply according to the available residual electric quantity and the load information of the power supply.
In the present invention, the remaining amount of work includes the remaining work time and the remaining number of works.
Preferably, in one embodiment, the power tool further comprises a display module for selectively displaying at least one of the remaining operation time and the remaining operation amount of the power source according to the type of the power tool. Specifically, the electric tool calculates the remaining operating time and the remaining operating quantity of the power supply according to the operating current and the available remaining capacity of the power supply during the operation of the tool detected by the current detection unit, and selectively displays the remaining operating time or the remaining operating quantity or both of them in sequence or simultaneously according to the type of the electric tool. Those skilled in the art will appreciate that data may be transmitted between the power source and the tool body to communicate operating current, remaining power of the power source, or other parameters of the power source, such as the manufacturer of the power source and historical operating parameters.
According to the method and the device, the residual working time or the residual working quantity of the power supply is calculated through the available residual electric quantity and the working current of the power supply, selective display is carried out according to needs, for users without experience or with less experience, the user can plan the working quantity in advance or prepare enough power supply packets in advance by displaying the residual working time or the residual working quantity of the power supply, the situation that the user cannot estimate the residual working time even knowing the available residual electric quantity, unnecessary time waste is caused is avoided, and the working efficiency is improved.
In the above embodiment, in step S1, the step of obtaining the available remaining power of the power supply is to use voltage-based power detection in the prior art, and the basic idea of this method is to use different numbers of grids for different voltages to represent the capacity of the power supply, which is relatively poor in accuracy. In order to obtain more accurate available residual capacity, the available residual capacity of the power supply is calculated by adopting an impedance method, because the internal resistance of the power supply is influenced by temperature, charge state and power supply aging degree, the internal resistance of the power supply is doubled after 100 times of charging and discharging, and the internal resistance of the power supply is increased along with the reduction of the temperature, the available residual capacity of the power supply needs to be corrected to obtain more accurate available residual capacity. In the present embodiment, step S1: the specific steps of obtaining the available remaining power of the power supply are as follows, please refer to fig. 2:
step S11: acquiring the residual electric quantity of the power supply;
step S12: and acquiring the manufacturer and historical working condition parameters of the power supply.
The electric tool comprises a power supply and a tool body, data transmission is carried out between the power supply of the electric tool and the tool body, the transmitted data comprises a manufacturer of the power supply and historical working condition parameters of the power supply, and the historical working condition parameters of the power supply comprise at least one parameter of power supply charging and discharging times, charging multiplying power, charging cut-off voltage, charging current, discharging cut-off voltage and power supply temperature. The charging multiplying power, the charging cut-off voltage, the discharging current, the discharging cut-off voltage and the power supply temperature are all charging and discharging parameters corresponding to the historical charging and discharging processes. The parameters can be selected according to the actual required control accuracy. And for different manufacturers, the capacity attenuation of the power supply is different, for example, even if the charging and discharging times, the charging cut-off voltage, the discharging cut-off voltage, the charging multiplying power and the like of the power supply are the same, the capacity attenuation of the power supply can be different for different manufacturers, therefore, the electric tool and the power supply directly transmit data, the manufacturer and the historical working condition parameters of the power supply are obtained, and the capacity attenuation of the power supply is determined according to the manufacturer and the historical working condition parameter analysis of the power supply.
Preferably, the power supply comprises a recording component for recording the discharge condition of the power supply and analyzing the capacity fading of the power supply according to the discharge condition of the power supply. Specifically, the recording component records the maximum current and the discharge time when the power supply discharges, and analyzes the capacity attenuation of the power supply according to the recorded data.
In an embodiment of the present invention, the above parameters may be obtained simultaneously to determine the capacity attenuation of the power supply.
And step S13, calculating the capacity attenuation amount of the power supply according to the manufacturer of the power supply and the historical working condition parameters.
And determining the capacity attenuation amount of the power supply according to the corresponding relation between the manufacturer of the power supply and the historical working condition parameters, wherein the calculated capacity attenuation amount is more accurate, so that the obtained available residual electric quantity is more accurate. In this embodiment, the corresponding relationship between the historical operating condition parameters of the power supply and the capacity attenuation amount and the corresponding relationship between the historical operating condition parameters and the power supply manufacturer are stored in advance. The correspondence may be stored in a table form, or may be stored by a mathematical model. The corresponding relation can be obtained through simulation experiment tests.
In step S14, the available remaining capacity of the power supply is calculated from the remaining capacity and the capacity attenuation amount of the power supply.
The current available residual capacity of the power supply is determined according to the residual capacity and the capacity attenuation quantity of the power supply, so that the actually obtained available residual capacity can be ensured to be the capacity which can be used by an actual user, the use requirement of the user can be met, and the accuracy is high.
In the above embodiment, as shown in fig. 3, in step S11, the step of obtaining the remaining power of the power supply further includes:
step S111, calculating the charging capacity of the power supply;
the charging capacity of the power supply is equal to the result of time integration of the charging current and then multiplied by the charging efficiency; the lithium battery charger is typically a CC/CV charge. Charging capacity Q of rechargeable batterycEqual to the result of the integration of the charging current I over time t multiplied by the charging efficiency η, as follows:
step S112, determining the total electric quantity of the power supply according to the electric quantity before the power supply is charged and the charging electric quantity;
total quantity of electricity Q of batterytEqual to the amount of electricity before charging the battery, i.e.Last remaining capacity QrAnd the amount of charge QcAnd the following formula:
in step S113, the discharge power amount of the power supply is calculated.
The calculation modes of the discharging electric quantity and the charging electric quantity are the same, and the integral result of the discharging current to the time is used as the real-time discharging electric quantity Qd。
And step S114, determining the residual capacity of the battery according to the total capacity and the discharge capacity of the power supply.
The current charge of the battery is equal to the total charge Q of the batterytSubtracting real-time discharge capacity Qd。
The amount of remaining power determined in this manner has a high degree of accuracy.
In another embodiment of the present invention, a specific step in the embodiment of fig. 1 is as follows, please refer to fig. 4,
step S31: and calculating the remaining working time of the power supply according to the available remaining capacity and the load information of the power supply.
For the first electric tools, such as a mower, a grass trimmer, a pruning shear, a blowing and sucking machine, a chain saw and the like, because the change of the load along with the time is not obvious, and the user can more intuitively know the operation condition of the available residual electric quantity of the power supply through the residual operation time.
Step S4: and calculating the residual work quantity of the power supply according to the available residual capacity and the load information of the power supply.
For the second electric tool, such as an electric drill, an electric hammer, an electric wrench and the like, the residual working quantity of the power supply is calculated according to the available residual electric quantity and the load information of the power supply, specifically, the power supply matched and connected with the electric drill can drill a plurality of holes, the power supply matched and connected with the electric hammer can drill a plurality of screws and the like, so that a user can better know the residual working quantity, plan in advance, avoid unnecessary time waste and improve the working efficiency.
Step S5: the remaining operation time or the remaining operation amount of the power source is selectively displayed according to the type of the power tool.
Preferably, in an embodiment of the present invention, the power tool may selectively display the remaining operation time or the remaining operation amount of the power source. In one embodiment, the user may manually select the remaining operation time or the remaining number of operations of the power tool display power source as desired. In another embodiment, the power tool may automatically identify the type of tool, automatically display the remaining operating time of the battery if the first power tool is used, and automatically display the remaining number of operations of the power source if the second power tool is used.
In another embodiment, the power supply includes an identification component, the identification module is disposed in the power tool body, and the identification component of the power supply identifies the identification information in the identification unit in the power tool body and identifies the type of the power tool according to the identification information. If the first electric tool is identified, the remaining working time of the power supply is automatically displayed, and if the second electric tool is identified, the remaining working quantity of the power supply is automatically displayed. Preferably, the power supply can communicate with an external device to update the identification information in the power supply identification module in time. Specifically, the identification module in the power supply can perform data transmission with external terminal equipment such as a mobile phone, a computer and a pad, and the identification information in the power supply identification module is updated in time, so that the expansibility of the power supply is improved, and the power supply can identify more various electric tools.
In the embodiment, the remaining working time or the remaining working quantity of the power supply can be transmitted to the external mobile terminal and displayed by the external mobile terminal, so that the display mode is more convenient.
The invention can automatically identify the type of the tool and automatically select and display the remaining working time of the power supply or the remaining working quantity of the power supply according to different types of the tool. The intelligent multifunctional intelligent robot has the advantages of obtaining better man-machine effect and higher intelligent effect, and improving the working efficiency.
In an embodiment of the present invention, for the first electric tool, such as a garden-type electric tool, the working conditions of the garden-type electric tool are relatively stable, that is, the working conditions of the garden-type electric tool do not fluctuate greatly, and the average load value can be replaced by real-time load information of the garden-type electric tool. As shown in fig. 5, step S2: the step of acquiring load information during operation of the electric power tool includes the substeps of:
step S21: and acquiring real-time load information of the first electric tool during operation.
In the invention, the load information is mainly represented as current information, namely the real-time working current of the garden electric tool during operation is obtained, and the real-time working current can be approximated to the average working current because the working condition and the power consumption of the garden electric tool are stable.
Step S22: and calculating the remaining working time of the power supply according to the available remaining electric quantity of the power supply and the real-time load information.
The available remaining capacity Q can be calculated by the above step S1The residue is leftThe available residual capacity Q can be obtained according to the integral of the real-time current to the timeThe residue is leftThe duration of operation at this current is as follows:
in an embodiment of the present invention, for a first electric tool, such as a lawn mower, a blow-suction machine, a chain saw, etc., when a power source is installed on the first electric tool, such as a lawn mower, to supply power to the first electric tool, the electric tool is started, and after the electric tool is stably operated, a real-time operating current of the electric tool is obtained.
Preferably, in the above embodiment, the remaining operation amount of the power supply may also be calculated according to the available remaining capacity of the power supply and the real-time load information. Specifically, the first electric tool is a weeding tool, and the remaining work quantity is the available remaining electric quantity of the power supply and can maintain the weeding area of the first electric tool. When the first electric tool works, the real-time working current of the electric tool is obtained as the average working current, the working time of the unit electric quantity is obtained by dividing the unit electric quantity by the average working current, and the working area of the unit electric quantity is obtained according to the working time of the unit electric quantity multiplied by the working area in the unit time. The remaining operating time of the power supply is calculated by multiplying the remaining power amount available for the power supply by the operable time per unit power amount obtained in the above embodiment, and the operable area of the power supply is calculated by multiplying the remaining operating time of the power supply by the operable area per unit time.
In another embodiment of the present invention, for a second electric tool, such as an electric drill, an electric hammer, an electric wrench, an angle grinder, an electric circular saw, or a reciprocating saw, power consumption during operation is unstable, for example, when the electric drill drills holes on different materials, current and power consumption are different, and there may be a low power consumption, a medium power consumption, or a high power consumption. When the electric wrench is used for screwing, screws with different sizes and currents are different, or screws are screwed on different materials, so that the different materials can cause different currents and different power consumptions. In the present embodiment, step S2: the step of acquiring load information during operation of the power tool includes the following sub-steps, as shown in fig. 6:
step S201: after the second electric tool is started, recording load information of the second electric tool during operation;
after the second electric tool is started, the load information of the electric tool during operation is recorded in real time, and preferably, the real-time working current of the electric tool during operation is recorded in real time.
Step S202: calculating an average load value of the second electric tool during operation according to the recorded load information;
in this embodiment, the remaining operating time of the power supply can be calculated by calculating the average operating current of the tool according to the fact that the product of the average operating current and the remaining operating time is equal to the available remaining capacity of the power supply.
As shown in fig. 7, the step of calculating the average load value during the second electric tool operation based on the recorded load information includes:
step S212: and acquiring the recorded real-time load information of the second electric tool in the first working time, and calculating the first power consumption in the first working time by adopting an integral method.
Step S222: acquiring recorded real-time load information of the second electric tool in a second working time, and calculating second power consumption in the second working time by adopting an integral method;
acquiring load information recorded after the second electric tool is started, calculating the average working current of the second electric tool after the second electric tool is started according to the load information recorded after the second electric tool is started, and calculating the remaining working time of the power supply according to the average working current and the available remaining capacity of the power supply. Specifically, the load information recorded after the second electric tool is started can be divided into at least a first working time t according to time1Internal load information and second operating time t2Load information, in this embodiment, the load information is current information according to t1Internal real time current versus time t1The integral of (a) can yield the power consumption Q of the first operating time1According to t2Internal real time current versus time t2The integral of (a) can yield the power consumption Q of the first operating time2。
Step S232: according to the first power consumption Q1And a second power consumption amount Q2Calculating a first working time t1And a second operating time t2Total internal power consumption Q, Q ═ Q1+Q2。
Step S242: and acquiring the total time of the first working time and the second working time, and calculating the average load value of the second electric tool during operation according to the total time and the total power consumption.
Calculating the total time t of the first working time and the second working time as t1+t2And calculating the average working current I according to the integral of the average working current to the total time t when the total power consumption Q is equal to the average working current.
Step S203: and calculating the remaining working time of the power supply according to the available remaining capacity and the average load value of the power supply.
In this embodiment, the available remaining capacity Q of the power supply is determinedThe residue is leftEqual to the average operating current integrated over the remaining operating time, the remaining operating time can be calculated.
For the second electric tool, since the power consumption is related to the material of the working object or the size of the working object, there is a certain error in the method of calculating the remaining operating time of the power supply by identifying the type of the electric tool or calculating the available remaining power of the power supply according to the historical operating condition parameters of the tool in the prior art. In this embodiment, in order to accurately calculate the remaining operating time of the power supply, the real-time operating current of the tool during operation is recorded after the second electric tool is started, and the average operating current after the start is calculated according to the real-time operating current, so that the calculation structure is more accurate.
In another embodiment of the present invention, the second power tool may be in different operating conditions after being started (there may be a case of low power consumption and a case of high power consumption after being started), and the average load value is calculated by calculating the power consumption of the power tool under different power consumption, as shown in fig. 8, in the above step S202: the specific steps of calculating the average load value of the second electric tool during operation according to the recorded load information are as follows:
step S2020: acquiring recorded real-time load information of the second electric tool under the first working condition, and calculating first power consumption of the second electric tool under the first working condition by adopting an integral method;
step S2021: acquiring recorded real-time load information of the second electric tool under a second working condition, and calculating second power consumption of the second electric tool under the second working condition by adopting an integral method;
dividing the recorded load information of the second electric tool into at least a first time T according to the working conditions1Current information and second time T under first working condition2Current information in a second operating condition. According to T1Internal real-time current versus time T1The integral of (a) can yield the power consumption Q under the first operating condition11According to T2Internal real-time current versus time T2The integral of (a) can yield the power consumption Q under the second operating condition22。
Step S2022: calculating the total power consumption under the first working condition and the second working condition according to the first power consumption and the second power consumption;
according to the first power consumption Q11And a second power consumption amount Q22Calculating a first working time T1And a second operating time T2The total amount of power consumption Q in the battery,Q＝Q11+Q22。
step S2023: and acquiring the total time of the first working condition and the second working condition, and calculating the average load value under the first working condition and the second working condition according to the total time and the total power consumption.
Calculating the total time T ═ T of the first working time and the second working time1+T2And calculating the average working current I according to the integral of the total power consumption Q equal to the average working current to the total time t.
According to available residual capacity Q of power supplyThe residue is leftEqual to the average operating current integrated over the remaining operating time, the remaining operating time can be calculated.
In another embodiment of the present invention, when the power supply is installed on a second electric tool such as an electric hammer, an electric drill, an electric wrench, etc. to supply power thereto, not only the remaining operating time of the power supply can be calculated, but also the number of remaining operable electric tools, such as the number of holes that can be drilled by the electric drill, the number of screws that can be drilled by the electric wrench, etc., can be calculated. As shown in fig. 9, the specific steps are as follows:
step S2.1: recording load information of the second electric tool for completing preset operation;
taking the electric wrench as an example, the working time from the start of screwing the electric wrench to the time when the screw is flush with the surface of the material and the real-time working current in the working time are recorded. In order to accurately determine the time to complete a screw and the amount of power consumed, it is preferable to preset a current condition, which indicates that the screw is flush with the surface of the material when the current reaches the preset condition. The preset condition may be that the current reaches a preset value or that a first or higher derivative of the current reaches the preset condition.
Step S2.2: calculating an average load value of the second electric tool when the second electric tool completes the preset operation according to the recorded load information;
the total electric quantity of a screw which is driven by the electric wrench can be calculated according to the integral of the real-time current to the time, and the average working current of the screw can be calculated according to the operation time and the total electric quantity.
Step S2.3: and calculating the residual work quantity of the power supply according to the available residual capacity and the average load value of the power supply.
According to the available remaining capacity of the power supply and the average working current for completing one job in the above embodiments, the available remaining capacity of the power supply can be calculated to maintain the remaining number of works of the second electric tool, i.e., the available remaining capacity can maintain the second electric tool to drill several holes, drill several screws or unscrew several screws.
In the above embodiment, the method for calculating the remaining power available to the power supply calculates the time for which the remaining power supply can complete the operation according to the average working current for completing one operation when the electric tool operates, and the result is more accurate.
In the above embodiment, the remaining operating time of the power supply or the number of the preset operations can be displayed through the display device, so that a user can know the remaining use condition of the power supply in advance, whether a standby power supply is needed or not, and the like.
Preferably, the remaining operating time of the power supply or the number of finished preset operations may be transmitted to the mobile terminal through data, and a user may know the use condition of the power supply through the mobile terminal.
In the above embodiment, the power source includes the battery pack and the backpack battery pack, and for different power sources, the power tool can display the remaining working time or the remaining working amount of the power source according to the type selection of the power tool. And the identification information in the identification module in the power supply can be updated in time, and the expansibility is improved, so that the power supply can identify more various electric tools. To different electric tools, the display mode is different, has improved user's work efficiency, and its display mode is more intelligent, and the display result is more accurate.
The invention also provides a power supply electric quantity management system of the electric tool, and the structural block diagram is shown in fig. 10. The electric tool capable of calculating the remaining working time of the power supply comprises an available remaining power acquisition module 540 used for acquiring the available remaining power of the power supply, a load information acquisition module 310 used for acquiring load information during the operation of the electric tool, and a remaining operation amount calculation module 570 respectively connected with the available remaining power acquisition module 540 and the load information acquisition module 310 and used for calculating the remaining operation amount of the power supply according to the available remaining power of the power supply and the load information.
In the present invention, the remaining workload of the power supply includes one or both of the remaining operating time and the remaining operating quantity of the power supply, and the load information acquiring module 310 includes a current detecting unit for detecting the operating current of the power tool during operation.
In another embodiment of the present invention, a display module 590 is further included for selectively displaying one or both of the remaining operating time of the power supply and the remaining operating quantity of the power supply. Preferably, for the second power tool, the display module 590 displays the remaining number of operations of the power source.
In an embodiment of the present invention, a mode selection switch is disposed on the power tool, and a user can trigger the switch as required to select and display the remaining operating time of the power source or the remaining operating quantity of the power source. Preferably, in another embodiment, the power tool may automatically recognize its own type, and automatically select and display the remaining operation time of the power source or the remaining operation amount of the power source according to the type of the power tool.
Preferably, in another embodiment of the present invention, the power supply includes an identification component, the identification module is disposed in the power tool main body, and the identification component of the power supply identifies the identification information in the identification unit in the power tool main body and identifies the type of the power tool according to the identification information. If the first power tool is recognized, the display module 590 automatically displays the remaining operation time of the power source, and if the second power tool is recognized, the display module 590 automatically displays the remaining operation number of the power source. Preferably, the power supply can communicate with an external device to update the identification information in the power supply identification module in time. Specifically, the identification module in the power supply can perform data transmission with external terminal equipment such as a mobile phone, a computer and a pad, and the identification information in the power supply identification module is updated in time, so that the expansibility of the power supply is improved, and the power supply can identify more various electric tools.
In the embodiment, the remaining working time or the remaining working quantity of the power supply can be transmitted to the external mobile terminal and displayed by the external mobile terminal, so that the display mode is more convenient.
The invention can automatically identify the type of the tool and automatically select and display the remaining working time of the power supply or the remaining working quantity of the power supply according to different types of the tool. The intelligent multifunctional intelligent robot has the advantages of obtaining better man-machine effect and higher intelligent effect, and improving the working efficiency.
The electric tool comprises a tool body and a power supply, wherein in one embodiment, the tool body comprises a load information acquisition module 310 and a display module 590, the load information acquisition module 310 comprises a current detection unit, the current detection unit detects working current when the electric tool works and transmits the detected working current to a residual working capacity calculation module 570, the tool body and the power supply carry out data transmission through a communication module, the communication module transmits manufacturer and historical working condition parameters of the power supply to the tool body, the residual electric quantity acquisition module 320 in the tool body calculates available residual electric quantity of the power supply according to the residual electric quantity of the power supply and the manufacturer and historical working condition parameters of the power supply and transmits the available residual electric quantity to the residual working capacity calculation module 570, the residual working capacity calculation module 570 calculates the residual working time and the residual working capacity of the power supply according to the available residual electric quantity of the power supply and the working current detected by the current detection, and selectively displays the remaining operating time and the remaining number of operations of the power source through the display module 590 of the tool body.
In another embodiment of the present invention, the tool body includes a load information obtaining module 310, the power supply includes a display module 590, the load information obtaining module 310 includes a current detecting unit, the current detecting unit detects a working current of the power tool during operation and transmits the detected working current to the remaining workload calculating module 570, the remaining power obtaining module 320 calculates an available remaining power of the power supply according to the remaining power of the power supply and a manufacturer and historical operating condition parameters of the power supply and transmits the available remaining power to the remaining workload calculating module 570, the remaining workload calculating module 570 calculates a remaining operating time and a remaining operating quantity of the power supply according to the available remaining power of the power supply and the working current detected by the current detecting unit, and selectively displays the remaining operating time and the remaining operating quantity of the power supply through the display module 590 of the power supply.
In another embodiment of the present invention, the power supply includes a load information obtaining module 310 and a display module 590, the load information obtaining module 310 detects a working current of the tool body during working, and transmits the detected working current to the remaining work amount calculating module 570, the remaining power amount obtaining module 320 calculates an available remaining power amount of the power supply according to the remaining power amount of the power supply, a manufacturer of the power supply and historical operating condition parameters, and transmits the available remaining power amount to the remaining work amount calculating module 570, the remaining work amount calculating module 570 calculates a remaining working time and a remaining working amount of the power supply according to the available remaining power amount of the power supply and the working current detected by the current detecting unit, and selectively displays the remaining working time and the remaining working amount of the power supply through the display module 590 of the power supply.
In another embodiment of the present invention, the power supply includes a load information obtaining module 310, the tool body includes a display module 590, the load information obtaining module 310 in the power supply detects an operating current of the tool body during operation and transmits the detected operating current to the remaining workload calculation module 570, the remaining power obtaining module 320 calculates an available remaining power of the power supply according to the remaining power of the power supply and a manufacturer and historical operating condition parameters of the power supply and transmits the available remaining power to the remaining workload calculation module 570, the remaining workload calculation module 570 calculates a remaining operating time and a remaining operating quantity of the power supply according to the available remaining power of the power supply and the operating current detected by the current detection unit, and selectively displays the remaining operating time and the remaining operating quantity of the power supply through the display module 590 of the tool body.
In an embodiment of the present invention, for the first electric tool, such as a garden-type electric tool, the working conditions of the garden-type electric tool are relatively stable, that is, the working conditions of the garden-type electric tool do not fluctuate greatly, and the average load value can be replaced by real-time load information of the garden-type electric tool. The remaining operation amount calculation module 570 is respectively connected to the available remaining power acquisition module 540 and the load information acquisition module 310, and calculates the remaining power of the power supply according to the available remaining power and the real-time operating current of the power supplyAnd (5) making time. Specifically, the available residual capacity Q can be obtained according to the integral of the real-time current to the timeThe residue is leftThe duration of operation at this current is as follows:
preferably, in the above embodiment, the remaining work amount calculation module 570 may further calculate the remaining work amount of the power supply according to the available remaining power amount and the real-time work current of the power supply. Specifically, when the first electric tool is operated, the real-time operating current of the electric tool is acquired as the average operating current, the operable time per unit electric quantity is acquired by dividing the unit electric quantity by the average operating current, and the operable area per unit electric quantity is obtained by multiplying the operable area per unit time by the operable time per unit electric quantity. The remaining operating time of the power supply is calculated by multiplying the remaining power amount available for the power supply by the operable time per unit power amount obtained in the above embodiment, and the operable area of the power supply is calculated by multiplying the remaining operating time of the power supply by the operable area per unit time.
In an embodiment of the present invention, for a first electric tool, such as a lawn mower, a blow-suction machine, a chain saw, etc., when a power source is installed on the first electric tool, such as a lawn mower, to supply power to the first electric tool, the electric tool is started, and after the electric tool is stably operated, a real-time operating current of the electric tool is obtained.
In another embodiment of the present invention, the power tool comprises a second power tool, such as an electric hammer, an electric drill, an electric wrench, an electric circular saw, an angle grinder, or the like. For the second electric tool, because the power consumption is related to the material of the working object or the size of the working object, the load information of the tool during working can be recorded after the second electric tool is started.
Specifically, the load information obtaining module 310 includes a recording unit 311, and after the power supply is installed to the second electric tool, the second electric tool is started to record the working current of the electric tool during operation; the load information obtaining module 310 further includes an average load value calculating unit 312, configured to calculate an average working current of the second electric tool during operation according to the recorded working current; the remaining operation amount calculation module 570 is connected to the available remaining power acquisition module 540, the recording unit 311, and the average load value calculation unit 312, respectively, and calculates the remaining operation time of the power supply based on the available remaining power and the average operation current of the power supply.
Specifically, taking the electric drill as an example, after the preset power source is installed to the electric drill, the electric drill is started, the recording unit 311 records the working current and the corresponding time during the operation of the electric drill, the load information obtaining module 310 includes an average load value calculating unit 312, which is used for calculating the average working current after the electric drill is started according to the recorded working current, and preferably, the time after the electric drill is started is at least divided into a first working time t1And a second operating time t2The load information obtaining module 310 obtains the first working time t1Internal operating current and second operating time t2The working current is transmitted to the average load value calculating unit 311, and the average load value calculating unit 311 calculates the average load value according to t1Internal real time current versus time t1The integral of (a) can yield the power consumption Q of the first operating time1According to t2Internal real time current versus time t2The integral of (a) can yield the power consumption Q of the first operating time2。
And according to the first power consumption Q1And a second power consumption amount Q2Calculating a first working time t1And a second operating time t2Total internal power consumption Q, Q ═ Q1+Q2。
The average load value calculation unit 311 calculates the total time t of the first operating time and the second operating time as t1+t2According to the total power consumption Q being equal to the integral of the average operating current over the total time t, i.e.
The average operating current I may be calculated. The average load value calculating unit 311 calculatesThe average operating current I is transmitted to the remaining workload calculation module 570, and the remaining workload calculation module 570 calculates the remaining workload according to the available remaining power Q of the power supplyThe residue is leftEqual to the average operating current integrated over the remaining operating time, the remaining operating time can be calculated.
In the invention, the preset operation comprises punching, screwing or unscrewing and the like, the residual operation amount calculation module can not only calculate the residual working time of the power supply, but also calculate the number of preset operations of the power supply of the electric tool, namely, the available residual electric quantity of the power supply can drill a plurality of holes or screw a plurality of screws.
In another embodiment of the present invention, the electric tool includes a second electric tool, and the load information acquiring module 310 includes a recording unit 311 for recording load information of the second electric tool for completing a preset operation; the load information obtaining module 310 further includes an average load value calculating unit 312, configured to calculate an average load value when the second electric tool is operated according to the recorded load information; the remaining operation amount calculation module 570 is respectively connected to the available remaining power amount acquisition module 540, the recording unit 311, and the average load value calculation unit 312, and calculates the number of preset operations that can be completed by the power supply according to the available remaining power amount and the average load value of the power supply.
Specifically, taking the electric wrench as an example, the recording unit 311 in the load information acquiring module 310 records the operation time of the electric wrench from the start of screwing to the time when the screw is flush with the surface of the material and the real-time operating current in the operation time. In order to accurately determine the time to complete a screw and the amount of power consumed, it is preferable to preset a current condition, which indicates that the screw is flush with the surface of the material when the current reaches the preset condition. The preset condition may be that the current reaches a preset value or that a first or higher derivative of the current reaches the preset condition. The average load value calculating unit 312 may calculate the total electric quantity of a screw that has been driven by the electric wrench according to the real-time current integrated with time, and calculate the average working current of the screw according to the working time and the total electric quantity. The remaining work amount calculation module 570 may calculate the available remaining power amount of the power supply to drill several holes, drill several screws, or unscrew several screws based on the available remaining power amount of the power supply and the average operating current for completing one job.
In the above embodiment, the method for calculating the remaining power available to the power supply calculates the time for which the remaining power supply can complete the operation according to the average working current for completing one operation when the electric tool actually performs the operation, and the result is more accurate.
For the second electric tool, since the power consumption is related to the material of the working object or the size of the working object, there is a certain error in the method of calculating the remaining operating time of the power supply by identifying the type of the electric tool or calculating the available remaining power of the power supply according to the historical operating condition parameters of the tool in the prior art. In this embodiment, in order to accurately calculate the remaining operating time of the power supply, the real-time operating current of the tool during operation is recorded after the second electric tool is started, and the average operating current after the start is calculated according to the real-time operating current, so that the calculation structure is more accurate.
In an embodiment of the present invention, a power supply capacity management system for an electric tool further includes a remaining capacity obtaining module 320 and a communication module, wherein the remaining capacity obtaining module 320 is configured to obtain a remaining capacity of a power supply. And the communication module is used for acquiring the historical working condition parameters of the power supply stored in the power supply. The power supply is internally provided with a communication module for data transmission with the communication module of the electric tool, and the transmitted data comprises but is not limited to historical working condition parameters of the power supply. And an available remaining power acquiring module 540, configured to calculate an available remaining power of the power supply according to the remaining power of the power supply acquired by the remaining power acquiring module 320 and the historical operating condition parameter of the power supply.
Preferably, in the above embodiment, the electric tool capable of calculating the remaining operating time of the power supply further includes a storage module 560 for storing in advance a correspondence between a manufacturer of the power supply and a historical operating condition parameter and a power supply capacity attenuation, and the available remaining power acquiring module 540 is configured to determine a capacity attenuation of the power supply according to the correspondence between the manufacturer of the power supply and the historical operating condition parameter and the capacity attenuation, and calculate the available remaining power of the power supply according to the capacity attenuation of the power supply. The corresponding relation can be obtained through simulation experiment tests. For example, even if the number of times of charging and discharging the power supply, the cut-off voltage of charging the power supply, the cut-off voltage of discharging the power supply, the charging rate and the like are the same, the capacity attenuation of the power supply may be different for different manufacturers.
In the invention, the historical working condition parameters of the power supply comprise at least one parameter of charge and discharge times, charge multiplying power, charge cut-off voltage, charge current, discharge cut-off voltage and power supply temperature.
Preferably, the power supply comprises a recording component for recording the discharge condition of the power supply and analyzing the capacity fading of the power supply according to the discharge condition of the power supply. Specifically, the recording component records the maximum current and the discharge time when the power supply discharges, and analyzes the capacity attenuation of the power supply according to the recorded data
The capacity attenuation of the power supply is determined through the historical working condition parameters of the power supply, and the residual capacity of the power supply is corrected, so that the residual capacity of the power supply is calculated more accurately, and a user can know the residual capacity of the power supply more accurately. In the invention, the user can also know the remaining working time of the power supply, so that the user can know the available time of the power supply in time and prepare the standby power supply in advance, thereby avoiding influencing the working efficiency and wasting time. In order to calculate the remaining working time of the power supply more accurately, the invention adopts different calculation methods for different types of electric tools, the calculation result is more accurate, and for garden type electric tools with more stable power consumption, the real-time working current after the electric tools are started is detected as the average working current of the electric tools, and the remaining working time of the power supply is calculated. For the second electric tool with large power consumption change, the remaining working time of the power supply can be calculated by calculating the average working current after the electric tool is started, or the number of preset operations which can be completed by calculating the available remaining electric quantity of the power supply according to the average working current when the electric tool completes one operation can be calculated. According to the invention, the time and the number of the operation of the electric tool under different working conditions by using the available residual electric quantity of the power supply can be obtained by the user through respectively calculating the electric tools with different power consumption types.
Fig. 11 is a flowchart illustrating a power management method of an electric tool according to an embodiment. The electrically powered devices may include all devices that are powered by their own stored energy power source to maintain their own operation. For example, the electric device may be a digital device such as a mobile phone, a tablet, or a computer, or may be an electric tool such as an electric drill, a mower, or an electric saw. The power supply within the electrically powered device is a rechargeable lithium power supply. Referring to fig. 11, the method includes the steps of:
in step S110, the remaining capacity of the power supply is determined.
In the present embodiment, the step of determining the remaining capacity of the power supply includes the following sub-steps, as shown in fig. 12.
Step S210, calculating the charging capacity of the power supply.
The lithium battery charger is typically a CC/CV charge with a constant current source schematic as shown in fig. 13. Charging quantity Q of charging power supplycEqual to the result of the integration of the charging current I over time t multiplied by the charging efficiency η, as follows:
step S220, determining the total electric quantity of the power supply according to the electric quantity before the power supply is charged and the charging electric quantity.
Total electric quantity Q of power supplytEqual to the electric quantity before power charging, namely the last available residual electric quantity QrAnd the amount of charge QcAnd the following formula:
in step S230, the discharge capacity of the power supply is calculated.
The calculation modes of the discharging electric quantity and the charging electric quantity are the same, and the integral result of the discharging current to the time is used as the real-time discharging electric quantity Qd。
In step S240, the remaining capacity of the power supply is determined according to the total capacity of the power supply and the discharge capacity.
The residual capacity of the power supply is equal to the total capacity Q of the power supplytSubtracting real-time discharge capacity Qd。
The amount of remaining power determined in this manner has a high degree of accuracy.
And step S120, acquiring historical working condition parameters of the power supply.
The historical working condition parameters of the power supply comprise at least one parameter of charging and discharging times, charging multiplying power, charging cut-off voltage, discharging current, discharging cut-off voltage and power supply temperature. The charging multiplying power, the charging cut-off voltage, the discharging current, the discharging cut-off voltage and the power supply temperature are all charging and discharging parameters corresponding to the historical charging and discharging processes. The parameters can be selected according to the actual required control accuracy. In one embodiment, the above parameters may be obtained simultaneously to determine the capacity fade of the power supply.
And step S130, determining the capacity attenuation amount of the power supply according to the historical working condition parameters of the power supply.
And determining the capacity attenuation amount of the power supply according to the historical working condition parameters of the power supply, such as the charging and discharging times of the power supply, the ambient temperature and the like. In this embodiment, the corresponding relationship between the historical operating condition parameters of the power supply and the capacity attenuation amount is stored in advance. The correspondence may be stored in a table form, or may be stored by a mathematical model. The corresponding relation can be obtained through simulation experiment tests.
And step S140, determining the current available residual capacity of the power supply according to the residual capacity and the capacity attenuation quantity of the power supply.
The current available residual capacity of the power supply is determined according to the residual capacity and the capacity attenuation of the power supply, so that the actually obtained available residual capacity can be ensured to be the capacity which can be used by an actual user, the use requirement of the user can be met, and the accuracy is high.
And step S150, outputting the available residual capacity.
The available residual capacity can be directly output to the processing module for relevant processing so as to further obtain other target parameters, such as sustainable working time and the like. In an embodiment, the available remaining power can also be output through the display module, so that a user can visually check the available remaining power of the electric device. Due to the fact that the accuracy of the available residual electric quantity is high, a user can accurately know the available residual electric quantity condition of the electric equipment, so that the user can plan the electricity utilization in advance, and the use requirement of the user is met.
After the residual capacity of the power supply is determined, the capacity attenuation quantity of the power supply can be determined according to the historical working condition parameters of the power supply, such as the ambient temperature, the power supply charging and discharging times, the discharging current and the like in the historical charging and discharging process of the power supply, so that the available residual capacity which can be actually used by a user can be accurately determined according to the residual capacity and the capacity attenuation quantity. That is, the method determines the real-time available remaining power according to the service time (corresponding to the charging and discharging times) of the power supply and the historical service environment (corresponding to the environmental temperature), so that the value of the available remaining power is relatively accurate, and the actual service requirement of the user can be met.
In an embodiment, the method further includes steps S410 to S430 on the basis of the foregoing embodiment, as shown in fig. 14.
Step S410, obtaining the current discharging current of the power supply.
The current discharge current of the power supply is detected by a detection device such as a current sensor. In one embodiment, the discharge current of the power supply is in a variable state, so that the average value of the discharge current in a preset time interval can be counted as the discharge current of the power supply. The preset time interval can be set to be 1-10 s. Too short a predetermined time interval may result in too fast a display, frequent data beats and the eyes are not clearly visible.
And step S420, calculating the sustainable working time of the electric equipment under the current working condition according to the discharge current and the available residual capacity.
The sustainable energy supply time of the power supply under the current working condition, namely the sustainable working time of the electric equipment can be estimated according to the current discharging current and the available residual capacity. The accuracy of the available residual electric quantity is higher, so that the continuous working time can be ensured to be accurate. Moreover, the continuous working time can be updated in real time according to the change of the discharge current, namely the change of the load, the real-time performance is better, and the use requirements of users can be better met.
Step S430, displaying the sustainable working time.
According to the displayed sustainable working time, the user can know the service condition of the power supply, so that the follow-up work can be planned and laid out in advance, and the use requirement of the user can be met. In this embodiment, the electric device may display the sustainable operating time alone, or may display the sustainable operating time and the available remaining power at the same time.
The embodiment of the invention also provides a power supply electric quantity management system of the electric tool, and the structural block diagram of the power supply electric quantity management system is shown in fig. 15. The power management system comprises a residual power determining module 510, a historical operating condition parameter acquiring module 520, a capacity attenuation amount determining module 530, an available residual power calculating module 540 and an output module 550.
The remaining power determining module 510 is used for determining the remaining power of the power supply. In one embodiment, the remaining power determining module 510 includes a charging power calculating unit 610, a total power determining unit 620, a discharging power calculating unit 630, and a remaining power determining unit 640, as shown in fig. 16. The charging capacity calculation unit 610 is configured to calculate a charging capacity of the power supply. The charge capacity of the power supply is equal to the result of the integration of the charging current over time multiplied by the charging efficiency. The total power determining unit 620 is connected to the charging power calculating unit 610, and is configured to determine the total power of the power according to the power before charging and the charging power. The discharging power calculating unit 630 is used for calculating the discharging power of the power supply. The discharge capacity of the power supply is equal to the integral of the discharge current over time. The remaining power determining unit 640 is respectively connected to the total power determining unit 620 and the discharging power calculating unit 630, and is configured to determine the remaining power of the power according to the total power and the discharging power of the power. The remaining power determined by the remaining power determining module 510 having the above-described structure has high accuracy.
The historical operating condition parameter obtaining module 520 is configured to obtain historical operating condition parameters of the power supply. The historical working condition parameters of the power supply comprise at least one parameter of charging and discharging times, charging multiplying power, charging cut-off voltage, discharging current, discharging cut-off voltage and power supply temperature. Therefore, the historical operating condition parameter acquiring module 520 may be provided with a corresponding historical operating condition parameter acquiring unit, such as a charging and discharging frequency counting unit and a temperature detecting unit.
The capacity attenuation determination module 530 is coupled to the historical operating condition parameter acquisition module 520. The capacity attenuation determining module 530 is configured to determine a capacity attenuation of the power supply according to the historical operating condition parameters, such as the charging and discharging times and the ambient temperature, acquired by the historical operating condition parameter acquiring module 520. In one embodiment, the system further comprises a storage module 560. The storage module 560 is used for corresponding relation between historical operating condition parameters of the power supply and capacity attenuation. Therefore, the capacity attenuation determination module 530 may determine the capacity attenuation under the current operating condition according to the corresponding relationship.
The available remaining power calculating module 540 is respectively connected to the remaining power determining module 510 and the capacity attenuation determining module 530, and is configured to determine a current available remaining power of the power supply according to the remaining power and the capacity attenuation of the power supply. The current available residual capacity of the power supply is determined according to the residual capacity and the capacity attenuation value of the power supply, so that the actually obtained available residual capacity can be ensured to be the capacity which can be used by an actual user, the use requirement of the user can be met, and the accuracy is high.
The output module 550 is connected to the available remaining power calculating module 540 for outputting the available remaining power. The output module 550 may be a transmission device, configured to output the available remaining power calculated by the available remaining power calculation module 540 to other processing modules for further processing, so as to obtain corresponding target parameters. In an embodiment, the output module 550 may also be a display module to display the available remaining power. The display module can be an LED display screen, an LCD display screen or an electric quantity indicator lamp.
After the residual capacity of the power supply is determined, the capacity attenuation quantity of the power supply can be determined according to historical working condition parameters of the power supply, such as the ambient temperature, the power supply charging and discharging times, the discharging current and the like in the historical charging and discharging process of the power supply, so that the available residual capacity which can be actually used by a user can be accurately determined according to the residual capacity and the capacity attenuation quantity. That is, the system can determine the real-time available remaining power according to the service time (corresponding to the charging and discharging times) of the power supply, the historical service environment (corresponding to the ambient temperature) and the size condition (corresponding to the discharging current) of the load, so that the value of the available remaining power is relatively accurate, and the actual use requirement of a user can be met.
In another embodiment, the power management system further includes a sustainable working time calculation module 570, a current detection module 580 and a display module 590, as shown in fig. 15. The sustainable working time calculation module 570 is respectively connected to the available remaining power calculation module 540 and the current detection module 580. The current detection module 730 is used for detecting the current discharging current of the power supply. The current detection module 730 may be implemented by a detection device such as a current sensor. The sustainable working time calculation module 570 is used for calculating the sustainable working time of the electric device under the current working condition according to the discharge current and the available remaining capacity. The accuracy of the available residual electric quantity is higher, so that the continuous working time can be ensured to be accurate. Moreover, the continuous working time can be updated in real time according to the change of the discharge current, namely the change of the load, the real-time performance is better, and the use requirements of users can be better met. The display module 590 is used for displaying the sustainable working time. In this embodiment, the display module 590 may display the sustainable working time alone, or may display the sustainable working time and the available remaining power at the same time.
According to the sustainable working time displayed by the display module 590, the user can know the service condition of the power supply, so that the follow-up work can be planned and laid out in advance, and the use requirement of the user can be well met.
The embodiment of the invention also provides the electric equipment. The electric equipment comprises an equipment body and the electric quantity management system in any embodiment. Through the electric quantity management system, a user can accurately know the actual available residual electric quantity and the sustainable working time of the electric equipment. For example, the electric drill can drill a plurality of holes, and the mower can cut grass for a plurality of times, repair branches and leaves for a plurality of times, so that the work arrangement of a user is facilitated.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (33)
- A power supply capacity management method for a power tool including a power supply for supplying power to the power tool, the method comprising:acquiring available residual capacity of a power supply;acquiring load information of the electric tool during operation;and calculating the residual workload of the power supply according to the available residual capacity of the power supply and the load information.
- The method of claim 1, wherein the remaining amount of work comprises a remaining work time and a remaining amount of work.
- The method of claim 2, further comprising:selectively displaying at least one of a remaining operating time and a remaining number of operations of the power supply according to a type of the power tool.
- The method of claim 2, wherein the power tool comprises at least one of a first power tool having a non-significant load change over time and a second power tool having a significant load change over time.
- The method according to claim 4, wherein the obtaining load information while the electric power tool is operating; the step of calculating the remaining workload of the power supply according to the available remaining capacity of the power supply and the load information comprises the following steps:acquiring real-time load information of the first electric tool during operation;and calculating the residual workload of the power supply according to the available residual capacity and the real-time load information of the power supply.
- The method of claim 5, wherein the first power tool is a weeding tool, and the remaining number of operations is an area where the remaining amount of power available from the power source can maintain weeding with the first power tool.
- The method according to claim 4, wherein the obtaining load information while the electric power tool is operating; the step of calculating the remaining workload of the power supply according to the available remaining capacity of the power supply and the load information comprises the following steps:after the second electric tool is started, recording load information of the second electric tool during operation;calculating an average load value of the second electric tool during operation according to the recorded load information;and calculating the remaining working time of the power supply according to the available remaining capacity of the power supply and the average load value.
- The method of claim 7, wherein the step of calculating an average load value for the second type of power tool operation based on the recorded load information comprises:acquiring recorded real-time load information of the second electric tool in a first working time, and calculating first power consumption in the first working time by adopting an integral method;acquiring recorded real-time load information of the second type of electric tool in a second working time, and calculating second power consumption in the second working time by adopting an integral method;calculating the total power consumption in the first working time and the second working time according to the first power consumption and the second power consumption;and acquiring the total time of the first working time and the second working time, and calculating the average load value of the second electric tool during working according to the total time and the total power consumption.
- The method of claim 7, wherein the step of calculating an average load value while the second power tool is operating based on the recorded load information comprises:acquiring recorded real-time load information of the second electric tool under a first working condition, and calculating first power consumption of the second electric tool under the first working condition by adopting an integral method;acquiring recorded real-time load information of the second electric tool under a second working condition, and calculating second power consumption of the second electric tool under the second working condition by adopting an integral method;calculating the total power consumption under the first working condition and the second working condition according to the first power consumption and the second power consumption; and acquiring the total time of the first working condition and the second working condition, and calculating the average load value under the first working condition and the second working condition according to the total time and the total power consumption.
- The method according to claim 4, wherein the obtaining load information while the electric power tool is operating; the step of calculating the remaining workload of the power supply according to the available remaining capacity of the power supply and the load information comprises the following steps:recording load information of the second electric tool for completing preset operation;calculating an average load value of the second electric tool when the second electric tool completes preset operation according to the recorded load information;and calculating the residual work quantity of the power supply according to the available residual capacity of the power supply and the average load value.
- The method of claim 10, wherein the step of recording load information of the second power tool for completing a preset task, and the step of calculating an average load value of the second power tool for completing the preset task according to the recorded load information comprises:recording time and load information of the second type of electric tool from the beginning of preset operation to when the load information meets preset conditions;calculating the total electric quantity for completing the preset operation by utilizing an integral method according to the time and the load information;and calculating the average load value when the preset operation is finished according to the time and the total electric quantity.
- The method of claim 10, wherein the predetermined task comprises at least one of drilling, screwing, or unscrewing a screw, and wherein the remaining number of tasks comprises at least one of maintaining a number of second power tool bores, screws, or screws with a remaining amount of power available from the power source.
- The method of claim 1, wherein the step of obtaining the available remaining capacity of the power supply comprises:acquiring the residual capacity of the power supply;acquiring a manufacturer and historical working condition parameters of the power supply;calculating the capacity attenuation of the power supply according to the manufacturer of the power supply and the historical working condition parameters;and calculating the available residual capacity of the power supply according to the residual capacity of the power supply and the capacity attenuation quantity of the power supply.
- The method of claim 13, wherein the step of obtaining the available remaining capacity of the power supply further comprises:and recording the discharge current of the power supply, and calculating the capacity attenuation amount of the power supply according to the recorded discharge current.
- The method of claim 13, wherein the historical operating condition parameters of the power source comprise at least one of a number of charges and discharges, a charge rate, a charge cutoff voltage, a charge current, a discharge cutoff voltage, and a power source temperature.
- The method of claim 3, further comprising:reading the identification information provided by the identification module of the electric tool to identify the type of the electric tool, and selectively displaying at least one of the remaining working time and the remaining working amount of the power supply according to the type of the electric tool.
- The method of claim 16, further comprising:and communicating with an external device through the identification module of the power supply, and updating the identification information in the identification module.
- The method of claim 13, further comprising the step of:pre-storing the corresponding relation between the historical working condition parameters of the power supply and the capacity attenuation amount;determining the capacity attenuation amount of the power supply according to the corresponding relation between the historical working condition parameters of the power supply and the capacity attenuation;and calculating the available residual capacity of the power supply according to the capacity attenuation of the power supply.
- The method of claim 13, wherein the step of obtaining the remaining capacity of the power supply comprises:calculating the charging electric quantity of the power supply; the charging capacity of the power supply is equal to the result of time integration of the charging current multiplied by the charging efficiency;determining the total electric quantity of the power supply according to the electric quantity before the power supply is charged and the charging electric quantity;calculating the discharge electric quantity of the power supply; the discharge capacity of the power supply is equal to the integral of the discharge current over time;and determining the residual capacity of the power supply according to the total capacity and the discharge capacity of the power supply.
- The method of claim 1, wherein the power source comprises a battery pack and a backpack battery pack.
- A power supply power management system for a power tool, the power tool including a power supply that provides power to the power tool, the system comprising:the available residual electric quantity acquisition module is used for acquiring the available residual electric quantity of the power supply;the load information acquisition module is used for acquiring load information of the electric tool during operation;and the residual operation amount calculation module is respectively connected with the available residual electric quantity acquisition module of the power supply and the load information acquisition module and is used for calculating the residual operation amount of the power supply according to the residual electric quantity and the load information of the power supply.
- The system of claim 21, wherein the remaining amount of work comprises a remaining work time and a remaining amount of work.
- The system of claim 22, further comprising a display module for selectively displaying at least one of a remaining operating time and a remaining number of operations of the power supply according to a type of the power tool.
- The system of claim 22, wherein the power tool comprises at least one of a first power tool having a non-significant load change over time and a second power tool having a significant load change over time.
- The system of claim 24, wherein the load information acquisition module is configured to acquire real-time load information while the first power tool is operating;the residual workload calculation module is respectively connected with the available residual power acquisition module of the power supply and the load information acquisition module, and calculates the residual workload of the power supply according to the residual power and the real-time load information of the power supply.
- The system of claim 25, wherein the first power tool is a weeding tool, and the remaining number of operations is an area where the remaining amount of power available from the power source can maintain weeding with the first power tool.
- The system of claim 24, wherein the load information acquiring module comprises a recording unit, configured to record load information of the second electric tool during operation after the second electric tool is started;the load information acquisition module further comprises an average load value calculation unit which is used for calculating an average load value of the second electric tool during operation according to the recorded load information;the residual work amount calculating module is respectively connected with the available residual electric quantity obtaining module of the power supply, the recording unit and the average load value calculating unit, and calculates the residual work time of the power supply according to the residual electric quantity of the power supply and the average load value.
- The system of claim 27, wherein the load information acquiring module includes a recording unit for recording load information of the second electric tool for completing a preset operation;the load information acquisition module further comprises an average load value calculation unit which is used for calculating an average load value of the second electric tool during operation according to the recorded load information;the residual work amount calculation module is respectively connected with the available residual electric quantity acquisition module of the power supply, the recording unit and the average load value calculation unit, and calculates the residual work amount of the power supply according to the residual electric quantity and the average load value of the power supply.
- The system of claim 28, wherein the predetermined task comprises at least one of drilling, driving or loosening screws, and the remaining number of tasks comprises at least one of a number of holes drilled, a number of driving screws, or a number of loosening screws of the second power tool that can be maintained by the available remaining power of the power source.
- The system of claim 21, further comprising:the residual electric quantity acquisition module is used for acquiring the residual electric quantity of the power supply;the communication module is used for acquiring the manufacturer and the historical working condition parameters of the power supply stored in the power supply;and the available residual electric quantity acquisition module of the power supply is used for calculating the available residual electric quantity of the power supply according to the residual electric quantity of the power supply and the historical working condition parameters of the power supply.
- The system of claim 21, further comprising a storage module for pre-storing a correspondence between a manufacturer of the power supply and a historical operating condition parameter and a capacity attenuation amount;the available residual electric quantity obtaining module is used for determining the capacity attenuation quantity of the power supply according to the manufacturer of the power supply and the corresponding relation between the historical working condition parameters and the capacity attenuation, and calculating the available residual electric quantity of the power supply according to the capacity attenuation of the power supply.
- The system of claim 26, further comprising an identification module for identifying a type of the power tool.
- The system of claim 21, wherein the power source comprises a battery pack and a backpack battery pack.
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| CN201710288201X | 2017-04-27 | ||
| CN201710288201.XA CN108802616A (en) | 2017-04-27 | 2017-04-27 | Electrical equipment and its battery capacity management method and system |
| PCT/CN2018/084930 WO2018196862A1 (en) | 2017-04-27 | 2018-04-27 | Method and system for managing electric quantity of power supply of electric tool |
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| CN110325868B CN110325868B (en) | 2022-06-14 |
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| CN201710288201.XA Pending CN108802616A (en) | 2017-04-27 | 2017-04-27 | Electrical equipment and its battery capacity management method and system |
| CN201880013401.7A Active CN110325868B (en) | 2017-04-27 | 2018-04-27 | Power supply electric quantity management method and system of electric tool |
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| CN113792917A (en) * | 2021-08-31 | 2021-12-14 | 三一汽车起重机械有限公司 | Method and device for calculating residual operation time of electric crane and electric crane |
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| CN110970670B (en) * | 2019-03-04 | 2020-12-08 | 重庆长安新能源汽车科技有限公司 | Power battery management method and device and computer readable storage medium |
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| CN116864834A (en) | 2023-10-10 |
| CN108802616A (en) | 2018-11-13 |
| WO2018196862A1 (en) | 2018-11-01 |
| CN110325868B (en) | 2022-06-14 |
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