WO2018196862A1 - 电动工具的电源电量管理方法和系统 - Google Patents
电动工具的电源电量管理方法和系统 Download PDFInfo
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- WO2018196862A1 WO2018196862A1 PCT/CN2018/084930 CN2018084930W WO2018196862A1 WO 2018196862 A1 WO2018196862 A1 WO 2018196862A1 CN 2018084930 W CN2018084930 W CN 2018084930W WO 2018196862 A1 WO2018196862 A1 WO 2018196862A1
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- power
- remaining
- power source
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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
Definitions
- the invention belongs to the technical field of power tools, and in particular relates to a power source power management method and system for a power tool.
- Power tools are usually mated to an external power source that is powered by the power source to operate.
- the traditional power tools use the power display method is not intuitive enough, it is difficult for the user to accurately know when to replace the power or when to charge the power, which is inconvenient for the user to use, and the conventional power supply usually passes the method of collecting the power voltage. The power supply obtained by this method is extremely inaccurate.
- the power pack is provided with a remaining working time display device for displaying the remaining working time of the power pack, and the power pack is provided with an identification device, which can identify the type of the power tool to which it is mated and calculate the power pack. Provide the time for the power tool to work.
- the prior art calculates the remaining working time of the power pack according to the type of the power tool, and the result is inaccurate. The reason is that even for the same type of power tool, the remaining working time of the power source is different due to different working conditions during operation, for example, the electric wrench is screwed. The size of the screw and the material of the plate affect the load, which in turn affects the remaining working time of the power pack. Therefore, the prior art calculates the remaining working time of the power supply by the type of the power tool is inaccurate.
- the problem to be solved by the present invention is to provide a power source power management method and system for a power tool, which can accurately calculate the remaining workload of the power source according to the load information of the power tool.
- a power source management method for a power tool, the power tool including a power source, and providing power to the power tool including:
- the remaining work amount of the power source is calculated according to the available remaining power of the power source and the load information.
- the remaining work amount includes a remaining working time and a remaining work quantity.
- the method further includes:
- At least one of remaining operating time and remaining operating amount of the power source is selectively displayed according to the type of the power tool.
- the power tool includes at least one of a first power tool whose load does not change with time and a second power tool whose load changes significantly with time.
- the step of acquiring the load information when the power tool is in operation; and calculating the remaining work amount of the power source according to the available remaining power of the power source and the load information comprises:
- the remaining workload of the power source is calculated based on the available remaining power of the power source and real-time load information.
- the first power tool is a weeding tool
- the remaining working quantity is the available remaining power of the power source to maintain the area of the first power tool for weeding.
- the step of acquiring the load information when the power tool is in operation; and calculating the remaining work amount of the power source according to the available remaining power of the power source and the load information comprises:
- the remaining working time of the power source is calculated according to the available remaining power of the power source and the average load value.
- the step of calculating an average load value when the second type of power tool is operated according to the recorded load information comprises:
- the step of calculating the average load value of the second power tool during operation according to the recorded load information comprises:
- the step of acquiring the load information when the power tool is in operation; and calculating the remaining work amount of the power source according to the available remaining power of the power source and the load information comprises:
- the step of recording the load information of the preset work by the second power tool, and calculating the average load value when the second power tool completes the preset work according to the recorded load information comprises:
- the average load value when the preset job is completed is calculated according to the time and the total power.
- the preset operation comprises at least one of drilling, screwing or loosening the screw, the remaining working quantity including the available remaining power of the power source can maintain the number of holes drilled by the second power tool, playing At least one of the number of screws or the number of loosened screws.
- the step of acquiring the available remaining power of the power source includes:
- the step of acquiring the available remaining power of the power source further includes:
- a discharge current of the power source is recorded, and a capacity attenuation amount of the power source is calculated based on the recorded discharge current.
- the historical operating parameter of the power source includes at least one of a number of charging and discharging, a charging magnification, a charging cutoff voltage, a charging current, a discharge cutoff voltage, and a power supply temperature.
- the method further includes:
- the identification information provided by the identification module of the power tool is read to identify the type of the power tool, and at least one of remaining operation time and remaining work amount of the power source is selectively displayed according to the type of the power tool.
- the method further includes:
- the identification information in the identification module is updated by the identification module of the power source communicating with the external device.
- the method further comprises the steps of:
- the step of acquiring the remaining power of the power source includes:
- the charging power of the power source is equal to the result of charging current versus time integration and multiplying the charging efficiency
- the discharge capacity of the power source is equal to the integration of the discharge current with time
- the remaining power of the power source is determined according to the total power of the power source and the discharged power.
- the power source comprises a battery pack and a backpack battery pack.
- the present invention also protects a power supply management system for a power tool, the power tool including a power source, the power source providing power to the power tool, and the method further comprising:
- the remaining power acquisition module can be used to obtain the available remaining power of the power supply
- a load information obtaining module configured to acquire load information when the power tool is in operation
- the remaining workload calculation module is respectively connected to the power available remaining power acquisition module and the load information acquisition module, and configured to calculate a remaining workload of the power source according to the remaining power of the power source and the load information.
- the remaining work amount includes a remaining working time and a remaining work quantity.
- the method further includes a display module for selectively displaying at least one of a remaining working time and a remaining working amount of the power source according to the type of the power tool.
- the power tool includes at least one of a first power tool whose load does not change with time and a second power tool whose load changes significantly with time.
- the load information obtaining module is configured to acquire real-time load information when the first power tool is in operation
- the remaining workload calculation module respectively connects the power available remaining power acquisition module and the load information acquisition module, and calculates a remaining workload of the power source according to the remaining power of the power source and the real-time load information.
- the first power tool is a weeding tool
- the remaining working quantity is the available remaining power of the power source to maintain the area of the first power tool for weeding.
- the load information acquisition module includes a recording unit, configured to record load information of the second power tool during operation after the second power tool is started;
- the load information acquisition module further includes an average load value calculation unit, configured to calculate an average load value of the second power tool during operation according to the recorded load information;
- the remaining workload calculation module respectively connects the power available remaining power acquisition module, the recording unit, and the average load value calculation unit, and calculates the remaining power according to the remaining power of the power source and the average load value. operating hours.
- the load information obtaining module includes a recording unit, configured to record load information of the second power tool to complete a preset job;
- the load information acquisition module further includes an average load value calculation unit, configured to calculate an average load value of the second power tool during operation according to the recorded load information;
- the remaining workload calculation module respectively connects the power available remaining power acquisition module, the recording unit, and the average load value calculation unit, and calculates the remaining power according to the remaining power of the power source and the average load value. The number of jobs.
- the preset operation comprises at least one of drilling, screwing or loosening the screw, the remaining working quantity including the available remaining power of the power source can maintain the number of holes drilled by the second power tool, playing At least one of the number of screws or the number of loosened screws.
- the method further includes:
- a remaining power acquisition module configured to acquire a remaining power of the power source
- a communication module configured to acquire a manufacturer and a historical operating condition parameter of the power source stored in the power source
- the power supply available remaining power acquisition module is configured to calculate an available remaining power of the power supply according to a remaining power of the power source and a historical operating parameter of the power source.
- the method further includes a storage module, configured to pre-store a correspondence between a manufacturer and a historical operating condition parameter of the power supply and a capacity attenuation amount;
- the available remaining power acquiring module is configured to determine a capacity attenuation amount of the power source according to a correspondence between a manufacturer and a historical operating parameter of the power source and a capacity attenuation, and calculate an available remaining amount of the power source according to the capacity attenuation of the power source. Electricity.
- an identification module is further included for identifying the type of the power tool.
- the power source comprises a battery pack and a backpack battery pack.
- the present invention has the beneficial effects that the present invention calculates the capacity attenuation of the power source according to the historical operating parameter of the power source, and corrects the remaining capacity of the power source, thereby obtaining a more accurate power remaining capacity relative to the prior art.
- the remaining working time of the power source is calculated according to the load information of the power tool. In particular, different calculation methods may be adopted according to the load type of the power tool, and the remaining working time and remaining work quantity of the power source are calculated more accurately, for different types.
- the power tool adopts different display modes.
- the number of preset jobs can be completed by calculating the available remaining power, which is convenient for the user to understand the remaining power of the power supply. So that users can plan the workload in advance or prepare enough power in advance to avoid unnecessary time waste and improve work efficiency.
- FIG. 1 is a flow chart showing a method of managing a power source of a power tool in an embodiment of the present invention.
- FIG. 2 is a specific flow chart of step S1 in FIG. 1.
- FIG. 3 is another specific flowchart of step S11 in FIG. 2.
- FIG. 4 is a specific flow chart of FIG. 1.
- FIG. 5 is a specific flowchart of step S2 in FIG. 1.
- Fig. 6 is another specific flow chart 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 specific flow chart of step S2 in Figure 1.
- Figure 10 is a block diagram showing the principle of a power source management system for a power tool in an embodiment of the present invention.
- FIG. 11 is a flow chart showing a method of managing a power source of a power tool in an embodiment of the present invention.
- FIG. 12 is a specific flowchart of step S110 in FIG.
- Fig. 13 is a block diagram showing the principle of a constant current source of the battery of the electric device of Fig. 11.
- Fig. 14 is a flow chart showing a method of managing a power source of a power tool in another embodiment.
- Figure 15 is a schematic block diagram of a power supply management system of a power tool in an embodiment.
- FIG. 16 is a schematic block diagram of the remaining power determining module of FIG. 15.
- the power tool of the invention comprises a lawn mower, a lawn mower, a pruning shear, a blower, a chain saw, a smart lawn mower, a vacuum cleaner, an electric drill, an electric hammer, an electric wrench, an angle grinder, an electric circular saw or a reciprocating saw. Wait.
- the power tool of the present invention can be classified into a first power tool and a second power tool depending on whether the load changes with time or not.
- mowers, lawn mowers, pruning shears, blowers, chain saws and other power tools do not change the load over time when working, that is, the working conditions of such power tools are relatively stable and will not be interrupted.
- the invention is referred to as a first power tool.
- the electric tools such as electric drills, electric hammers, electric wrenches, angle grinders, electric circular saws or reciprocating saws have obvious changes in load over time, and the working conditions are unstable.
- the electric current gradually becomes larger.
- the cycle is cyclic, that is, the load of the power tool of the type changes significantly with time, that is, the second power tool of the present invention.
- the power tool of the present invention includes a power source that provides electrical energy to the power tool.
- the method for measuring the power source of the power tool of the present invention comprises the following steps:
- Step S1 Obtain the available remaining power of the power source.
- the available remaining power of the power supply refers to the amount of power that the power supply can actually discharge. Because the battery will have a certain loss in the charging and discharging process, that is, the power supply will have a certain degree of aging. Therefore, it is necessary to correct the remaining power of the power supply. Get a more accurate available battery power.
- Step S2 Acquire load information when the power tool is working.
- a current detecting unit is provided in the power tool for detecting or recording the operating current when the power tool is in operation.
- the current detecting unit can be disposed in the power source or in other parts of the power tool other than the power source, and can be disposed in the tool body of the power tool.
- Step S3 Calculate the remaining workload of the power source according to the available remaining power of the power source and the load information.
- the remaining work amount includes the remaining work time and the remaining work amount.
- the display module further comprises at least one of displaying a remaining working time of the power source and a remaining working amount according to the type of the power tool.
- the power tool calculates the remaining working time and the remaining working amount of the power source according to the working current when the tool is detected by the current detecting unit and the available remaining power of the power source, and selectively displays the remaining working time or remaining work according to the type of the power tool. The quantity or both are displayed in sequence or simultaneously.
- data transmission between the power source and the tool body can be performed to transmit the working current, the 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.
- the remaining working time of the power source or the remaining working amount is calculated by the available remaining power and working current of the power source, and the display is selectively displayed according to the need, for the user who has no experience or rich experience, by displaying the remaining working time of the power supply or remaining
- the number of jobs is convenient for the user to plan the workload in advance or prepare enough power packs in advance to prevent the user from estimating the remaining working time even if he knows the available remaining power, resulting in unnecessary time waste and improved work efficiency.
- step S1 the step of obtaining the available remaining power of the power source is based on voltage-based power detection in the prior art.
- the basic idea of this method is to use different grid numbers for different voltages to represent the power source. Capacity, this method is relatively inferior.
- the present invention uses the impedance method to calculate the available remaining power of the power supply, because the internal resistance of the power supply is affected by the temperature, the state of charge and the degree of aging of the power supply, and the internal resistance of the power supply is increased after 100 times of charging and discharging. Times, and the internal resistance of the power supply increases with the decrease of temperature, so it is necessary to correct the available remaining power of the power supply to obtain a more accurate available remaining power.
- the specific steps of the step S1: obtaining the available remaining power of the power supply are as follows, as shown in FIG. 2:
- Step S11 obtaining the remaining power of the power source
- Step S12 Obtain the manufacturer and historical operating condition parameters of the power supply.
- the power tool includes a power source and a tool body, and the data is transmitted between the power source of the power tool and the tool body.
- the data transmitted includes the historical operating condition parameters of the manufacturer and the power source of the power source, and the historical operating parameters of the power source include the charging and discharging of the power source.
- the charging magnification, the charging cutoff voltage, the discharging current, the discharging cutoff voltage, and the power supply temperature all correspond to the charging and discharging parameters in the history of charging and discharging.
- the parameters can be selected according to the actual required control accuracy.
- the capacity attenuation of the power source is different.
- different manufacturers even if the number of times of power supply and discharge, the power supply charge cutoff voltage, the discharge cutoff voltage, and the charging magnification are the same, the capacity attenuation of the power source may be different, and therefore, the present invention
- the power tool and the power supply directly perform data transmission, obtain the power supply manufacturer and historical operating condition parameters, and determine the power supply capacity attenuation according to the power supply manufacturer and historical operating parameter analysis.
- the power source comprises a recording component for recording the discharge condition of the power source, and analyzing the capacity attenuation of the power source according to the discharge condition of the power source.
- the recording component records the maximum current and the discharge time when the power source is discharged, and analyzes the capacity attenuation of the power source based on the recorded data.
- the above parameters may be acquired simultaneously to determine the amount of capacity attenuation of the power source.
- step S13 the capacity attenuation amount of the power source is calculated according to the manufacturer of the power source and the historical operating condition parameter.
- the capacity attenuation of the power supply is determined, and the calculated capacity attenuation amount is more accurate, so that the available remaining power is more accurate.
- the correspondence between the historical operating parameter of the power source and the capacity attenuation amount, and the correspondence between the historical operating parameter and the power supply manufacturer are stored in advance.
- Correspondence can be stored in tabular form or stored in a mathematical model. The correspondence can be obtained through a simulation experiment test.
- step S14 the available remaining power of the power source is calculated according to the remaining power of the power source and the capacity attenuation amount.
- the current available remaining power of the power supply is determined, so that the actually available available remaining power is the amount of power that the actual user can use, which can meet the user's use requirements and has high accuracy.
- step S11 the step of acquiring the remaining power of the power source further includes:
- Step S111 calculating a charging power of the power source
- the charging power of the power supply is equal to the result of charging current versus time integration and multiplied by the charging efficiency; the lithium battery charger is generally CC/CV charging.
- the charging power Q c of the rechargeable battery is equal to the result of integrating the charging current I with respect to time t and multiplying by the charging efficiency ⁇ as follows:
- Step S112 determining the total power of the power source according to the power and the charging power before the power is charged;
- the total power Q t of the battery is equal to the sum of the battery before charging, that is, the sum of the last remaining power Q r and the charging power Q c , as follows:
- step S113 the discharged power of the power source is calculated.
- the discharge amount and the charge amount are calculated in the same manner, and the integration result of the discharge current versus time is used as the real-time discharge amount Q d .
- step S114 the remaining power of the battery is determined according to the total power of the power source and the discharged power.
- the current battery charge is equal to the total battery charge Q t minus the real-time discharge charge Q d .
- the remaining power determined in this way has a higher accuracy.
- FIG. 4 a specific step in the foregoing embodiment of FIG. 1 is as follows, please refer to FIG. 4,
- Step S31 Calculate the remaining working time of the power source according to the available remaining power of the power source and the load information.
- the load is not obvious with time, and the user can understand the remaining power supply more intuitively through the remaining working time.
- the operation of the electricity is not obvious with time, and the user can understand the remaining power supply more intuitively through the remaining working time.
- Step S4 Calculate the remaining work quantity of the power source according to the available remaining power and load information of the power source.
- the remaining working quantity of the power source is calculated according to the available remaining power and load information of the power source.
- the power supply matched with the electric drill can also drill several holes.
- the power supply that is connected with the electric hammer can also be used with a few screws. The user can better understand the remaining work, plan well in advance, avoid unnecessary time waste, and improve work efficiency.
- Step S5 Selectively display the remaining working time of the power source or the remaining work amount according to the type of the power tool.
- the power tool selectively displays the remaining working time of the power source or the remaining amount of work.
- the user can manually select the power tool to display the remaining working time of the power source or the remaining amount of work as needed.
- the power tool can automatically identify the type of tool. If it is the first power tool, it automatically displays the remaining working time of the battery. If it is the second power tool, it automatically displays the remaining working amount of the power source.
- the power source includes an identification component in which the identification module is disposed, the identification component of the power source identifies the identification information in the identification unit within the power tool body, and identifies the type of the power tool based on the identification information. If the first power tool is recognized, the remaining working time of the power source is automatically displayed. If the second power tool is identified, the remaining working amount of the power source is automatically displayed.
- the power source can communicate with the external device to update the identification information in the power identification module in time.
- the identification module in the power source can transmit data between the external mobile phone, the computer, the pad and other terminal devices, and timely update the identification information in the power identification module, so that the power supply expandability is improved, and the power source can recognize more types. Power tools.
- the remaining working time or the remaining working quantity of the power source can also be transmitted to the external mobile terminal, and the external mobile terminal is used for display, and the display mode is more convenient.
- the invention can automatically identify the type of the tool, and automatically selects the remaining working time of the display power source or the remaining work quantity of the power source according to different types of tools. It has achieved better human-machine effect and higher intelligent effect, while improving work efficiency.
- step S2 the step of acquiring load information during the operation of the power tool includes the following sub-steps:
- Step S21 Acquire real-time load information when the first power tool is in operation.
- the load information is mainly represented by current information, that is, the real-time working current when the garden type electric tool is operated, because the garden type electric tool has relatively stable working conditions and the power consumption is relatively stable, so the real-time working current can be approximated as Average operating current.
- Step S22 Calculate the remaining working time of the power source according to the available remaining power of the power source and the real-time load information.
- Step S1 calculated by the available remaining residual quantity Q can be derived remaining time available remaining charge Q sustainable operating at real time according to the current time integral of the current, the following formula:
- the power source is installed when the first electric tool such as a lawn mower supplies electric energy thereto, and the electric motor is started.
- the tool when the power tool is stably working, obtains a real-time working current of the power tool, and the working condition is relatively stable after the power tool is stably operated, so the real-time working current can be approximated as the average working current of the power tool, according to the tool.
- the real-time working current and the remaining power of the power supply can be used to calculate the remaining working time of the power supply, and the user can prepare the power to be replaced in advance according to the remaining working time.
- the remaining working quantity of the power source may also be calculated according to the available remaining power of the power source and the real-time load information.
- the first power tool is a weeding tool
- the remaining working quantity is the available remaining power of the power source to maintain the weeding area of the first power tool.
- the real-time working current of the electric tool is obtained as the average working current
- the unit working amount is divided by the average working current to obtain the working time of the unit electric quantity
- the working time of the unit electric quantity is multiplied by the unit time.
- the work area gives the workable area of the unit of electricity.
- the power tool is unstable in operation, such as an electric drill in different materials.
- the current is different and the power consumption is different. There may be low power consumption, medium power consumption or high power consumption.
- the electric wrench is screwed, different sizes of screws, different currents, or screws on different materials, different materials will also lead to different currents, power consumption is also different.
- the step S2: the step of acquiring the load information during the operation of the power tool includes the following sub-steps, as shown in FIG. 6:
- Step S201 after the second power tool is started, record the load information when the second power tool is in operation;
- the load information of the power tool during operation is recorded in real time, and the real-time working current when the power tool is operated is preferably recorded in real time.
- Step S202 Calculate an average load value when the second power tool is operated according to the recorded load information
- the remaining working time of the power source can be calculated by calculating the average operating current of the tool.
- the step of calculating the average load value of the second power tool during operation based on the recorded load information includes:
- Step S212 Acquire real-time load information of the recorded second power tool during the first working time, and calculate the first power consumption amount during the first working time by using the integral method.
- Step S222 Acquiring the recorded real-time load information of the second power tool in the second working time, and calculating the second power consumption in the second working time by using the integral method;
- the load information recorded after the second power tool is started is obtained, and the average working current of the second power tool after starting is calculated according to the load information recorded after the start, and the remaining working time of the power source is calculated according to the average working current and the available remaining power of the power source.
- the load information recorded after the second power tool is started can be divided into load information in the first working time t 1 and load information in the second working time t 2 according to the time.
- the load information is current information according to the real time t 1 current integration time t 1
- power consumption can be drawn from the first operating time Q 1
- t 2 according to the real-time current integration time t 2 may be obtained first operating time consuming Power Q 2 .
- Step S242 Acquire a total time of the first working time and the second working time, and calculate an average load value when the second power tool is operated according to the total time and the total power consumption.
- Step S203 Calculate the remaining working time of the power source according to the available remaining power of the power source and the average load value.
- the prior art calculates the power supply remaining working time by identifying the type of the power tool or calculates the power supply according to the historical operating condition parameter of the tool. There is a certain amount of error in the method of remaining power.
- the real-time working current when the tool is operated is calculated, and the average operating current after the starting is calculated according to the real-time working current, and the calculation structure is more accurate.
- the average operating current in this embodiment is closer to the real-time operating current of the power tool, and the calculation result is more accurate.
- the second power tool may be in different operating conditions after startup (there may be low power consumption and high power consumption after startup), and the power consumption of the power tool under different power consumption is calculated.
- the above step S202 the specific steps of calculating the average load value when the second power tool is operated according to the recorded load information are as follows:
- Step S2020 acquiring real-time load information of the recorded second power tool in the first working condition, and calculating, by using an integral method, a first power consumption of the second power tool in the first working condition;
- Step S2021 Acquire real-time load information of the recorded second power tool under the second working condition, and calculate a second power consumption of the second power tool in the second working condition by using an integral method;
- the recorded load information of the second power tool is divided into current information under the first operating condition in the first time T 1 and current information in the second operating condition in the second time T 2 according to the operating conditions.
- the current real-time T 1 can be derived for the integration time T 1 of the first condition of the power consumption Q 11, T 2 according to the real-time current integration time T 2, a second condition of the power consumption can be obtained The quantity Q 22 .
- Step S2022 Calculate the total power consumption in the first working condition and the second working condition according to the first power consumption amount and the second power consumption amount;
- Step S2023 Acquire a total time of the first working condition and the second working condition, and calculate an average load value in the first working condition and the second working condition according to the total time and the total power consumption.
- the available remaining quantity Q of the remaining power is equal to the average operating current of the integral of the remaining operating time calculated remaining operating time.
- the power source when the power source is installed on the second power tool such as a hammer, an electric drill, an electric wrench, etc., it can calculate not only the remaining working time of the power source but also the remaining number of working power sources. For example, the number of holes that can be drilled by the electric drill, the number of screws that the electric wrench can be used, and the like. As shown in Figure 9, the specific steps are as follows:
- Step S2.1 recording load information of the second power tool to complete the preset job
- the preset condition may be that the current reaches a preset value or the first derivative or the high order derivative of the current reaches a preset condition.
- Step S2.2 calculating an average load value when the second power tool completes the preset operation according to the recorded load information
- the total power of one screw of the electric wrench can be calculated, and the average working current of one screw is calculated according to the working time and the total electric quantity.
- Step S2.3 Calculate the remaining work quantity of the power source according to the available remaining power and the average load value of the power source.
- the remaining power of the power source can be calculated to maintain the remaining working amount of the second power tool, and the remaining power can be used to maintain the second power tool. Hole, tap a few screws or loosen a few screws.
- the calculation method of the remaining power amount of the power source can be used to calculate the remaining power source to complete the operation time according to the average operating current of the operation of the power tool, and the result is more accurate. In this embodiment, the method is avoided. Due to the difference in the size of the screw or the material of the plate, the actual working current is different, and the calculation result is inaccurate.
- the remaining working time of the power supply or the number of completed preset operations can be displayed by the display device, so that the user can know the remaining usage of the power supply in advance, whether the backup power supply is needed, and the like.
- the remaining working time of the power source or the number of preset operations can be transmitted to the mobile terminal through data, and the user can know the usage of the power source through the mobile terminal.
- the power source includes a battery pack and a backpack battery pack.
- the power tool can select the remaining working time of the power source or the remaining work amount according to the type of the power tool.
- the identification information in the identification module in the power supply can be updated in time, and the scalability is improved, so that the power source can recognize a wider variety of power tools.
- the display mode is different, which improves the user's work efficiency, and the display mode is more intelligent, and the display result is more accurate.
- the invention also provides a power source power management system for a power tool, the block diagram of which is shown in FIG.
- the power tool for calculating the remaining working time of the power source includes an available remaining power acquiring module 540 for obtaining the available remaining power of the power source, the load information acquiring module 310 for acquiring load information when the power tool is in operation, and the remaining workload calculating module 570 And respectively connected to the available remaining power acquisition module 540 and the load information acquisition module 310, for calculating the remaining workload of the power source according to the available remaining power and load information of the power source.
- the remaining working amount of the power source includes one or both of the remaining working time of the power source and the remaining working amount
- the load information acquiring module 310 includes a current detecting unit for detecting the operating current when the power tool is operating.
- a display module 590 is further included for selectively displaying one or both of remaining power consumption of the power source and remaining workload of the power source. Preferably, for the second power tool, display module 590 displays the remaining amount of power of the power source.
- the power tool is provided with a mode selection switch, and the user can trigger the switch as needed to select the remaining working time of the display power source or the remaining working amount of the power source.
- the power tool can automatically identify its type, and automatically selects the remaining working time of the power source or the remaining working amount of the power source according to the type of the power tool.
- the power source includes an identification component
- the identification module is disposed in the power tool body
- the identification component of the power source identifies the identification information in the identification unit in the power tool body, and identifies the power tool according to the identification information. type. If the first power tool is recognized, the display module 590 automatically displays the remaining working time of the power source. If the second power tool is identified, the display module 590 automatically displays the remaining working amount of the power source.
- the power source can communicate with the external device to update the identification information in the power identification module in time.
- the identification module in the power source can transmit data between the external mobile phone, the computer, the pad and other terminal devices, and timely update the identification information in the power identification module, so that the power supply expandability is improved, and the power source can recognize more types. Power tools.
- the remaining working time or the remaining working quantity of the power source can also be transmitted to the external mobile terminal, and the external mobile terminal is used for display, and the display mode is more convenient.
- the invention can automatically identify the type of the tool, and automatically selects the remaining working time of the display power source or the remaining work quantity of the power source according to different types of tools. It has achieved better human-machine effect and higher intelligent effect, while improving work efficiency.
- the power tool of the present invention includes a tool body and a power source.
- the tool body includes a load information acquisition module 310 and a display module 590.
- the load information acquisition module 310 includes a current detecting unit, and the current detecting unit detects the working current of the power tool during operation. And transmitting the detected working current to the remaining workload calculation module 570, the tool body and the power source transmit data through the communication module, and the communication module transmits the manufacturer and the historical working condition parameters of the power source to the tool body, and the remaining power in the tool body is obtained.
- the module 320 calculates the available remaining power of the power source according to the remaining power of the power source and the manufacturer and historical operating parameters of the power source, and transmits the remaining power amount to the remaining workload calculation module 570.
- the remaining workload calculation module 570 detects the operation according to the available remaining power of the power source and the current detecting unit.
- the current calculates the remaining working time and the remaining working amount of the power source, and selectively displays the remaining working time of the power source and the remaining working amount through the display module 590 of the tool body.
- the tool body includes a load information acquiring module 310
- the power source includes a display module 590
- the load information acquiring module 310 includes a current detecting unit
- the current detecting unit detects the working current when the power tool operates, and detects the The working current is transmitted to the remaining workload calculation module 570.
- the remaining power acquisition module 320 calculates the available remaining power of the power supply according to the remaining power of the power source and the manufacturer and historical operating parameters of the power source, and transmits the remaining power to the remaining workload calculation module 570, and calculates the remaining workload.
- the module 570 calculates the remaining working time and the remaining working amount of the power source according to the available remaining power of the power source and the current detecting unit detecting the working current, and selectively displays the remaining working time and the remaining working amount of the power source through the display module 590 of the power source.
- the power supply includes a load information acquisition module 310 and a display module 590.
- the load information acquisition module 310 detects an operating current when the tool body is in operation, and transmits the detected operating current to the remaining work amount calculation module 570.
- the remaining power acquiring module 320 calculates the available remaining power of the power according to the remaining power of the power source and the manufacturer and historical operating parameters of the power, and transmits the remaining power to the remaining workload calculating module 570, and the remaining workload calculating module 570 according to the available remaining power and current of the power source.
- the detecting unit detects the remaining working time and the remaining working quantity of the working current calculation power source, and selectively displays the remaining working time of the power source and the remaining working quantity through the display module 590 of the power source.
- the power supply includes a load information acquiring module 310.
- the tool body includes a display module 590.
- the load information acquiring module 310 in the power source detects the working current when the tool body is in operation, and transmits the detected working current to the working current.
- the remaining workload calculation module 570 calculates the available remaining power of the power source according to the remaining power of the power source and the manufacturer and historical operating parameters of the power source, and transmits the remaining power amount to the remaining workload calculation module 570, and the remaining workload calculation module 570 according to the power source
- the available remaining power and current detecting unit detects the working current to calculate the remaining working time and the remaining working amount of the power source, and selectively displays the remaining working time of the power source and the remaining working amount through the display module 590 of the tool body.
- the working condition of the first power tool such as a garden power tool, including a lawn mower, a lawn mower, a blower, a chain saw, etc.
- the operating conditions fluctuate not much during the operation, and the average load value can be replaced by the real-time load information of the power tool.
- the remaining workload calculation module 570 connects the available remaining power acquisition module 540 and the load information acquisition module 310, respectively, and calculates the remaining working time of the power supply according to the available remaining power of the power source and the real-time operating current. The specific time based on the real-time current versus time can be used to calculate the available remaining power Q remaining at that current for sustainable operation, as follows:
- the remaining workload calculation module 570 can also calculate the remaining workload of the power source according to the available remaining power of the power source and the real-time operating current. Specifically, when the first power tool is in operation, the real-time working current of the power tool is obtained as an average working current, and the unit working time is obtained by dividing the unit power by the average working current, and the working time of the unit power is multiplied by the unit time. The workable area within the area gives the workable area of the unit of electricity. Calculating the remaining working time of the power supply according to the available power of the power supply obtained by multiplying the remaining power by the power consumption obtained in the above embodiment, and calculating the power working according to the remaining working time of the power supply multiplied by the workable area per unit time. area.
- the power source is installed when the first electric tool such as a lawn mower supplies electric energy thereto, and the electric motor is started.
- the tool when the power tool is stably working, obtains a real-time working current of the power tool, and the working condition is relatively stable after the power tool is stably operated, so the real-time working current can be approximated as the average working current of the power tool, according to the tool.
- the real-time working current and the remaining power of the power supply can be used to calculate the remaining working time of the power supply, and the user can prepare the power to be replaced in advance according to the remaining working time.
- the power tool includes a second power tool such as a hammer, an electric drill, an electric wrench, an electric circular saw, an angle grinder, and the like.
- a second power tool such as a hammer, an electric drill, an electric wrench, an electric circular saw, an angle grinder, and the like.
- the load information at the time of the tool operation can be recorded after the second power tool is started, and the load information recorded in the present invention is the tool book.
- the information after the second start is closer to the average working condition of the tool after the start than the historical working condition information, and the calculation result is more accurate.
- the load information acquiring module 310 includes a recording unit 311. After the power is installed to the second power tool, the second power tool is started to record the working current when the power tool is in operation; the load information acquiring module 310 further includes an average load value calculating unit 312. And calculating an average working current when the second power tool is operated according to the recorded working current; the remaining work amount calculating module 570 is respectively connected to the available remaining power obtaining module 540, the recording unit 311, and the average load value calculating unit 312, according to the available power. The remaining power and average operating current are used to calculate the remaining working time of the power supply.
- the recording unit 311 records the working current and the corresponding time during the electric drill operation
- the load information obtaining module 310 includes an average load value calculating unit 312, configured to The recorded working current calculates an average working current after the electric drill is started.
- the time after the electric drill is started is divided into at least a first working time t 1 and a second working time t 2 , and the load information acquiring module 310 obtains the first working time t a second operating current and the operating time t 1 in the operating current of the transmission 2 to the average load value calculating unit 311, the average load value is calculated in real time t 1 current integration time t 1 can be drawn first operating unit 311 time power consumption Q 1, t 2 according to the current real time t 2 can be drawn from the integral power consumption of the first working time Q 2.
- the first and calculates a second power consumption of the power consumption Q 1 and Q 2 first operating times t 1 and a second operating time t of the total power consumption in the 2 Q, Q Q 1 + Q 2.
- the average operating current I can be calculated.
- Average load value calculating unit 311 calculates the average operating current I to the remaining job transmission amount calculation module 570, module 570 calculates the remaining amount of work equal to the remaining Q average operating current integration remaining operating time based on available power remaining amount, the remaining calculated operating hours.
- the preset operation includes punching, screwing or loosening the screw, etc.
- the remaining workload calculation module can not only calculate the remaining working time of the power source, but also calculate the number of preset operations of the power source of the power tool, that is, the power source. You can drill a few holes or a few screws with the remaining power available.
- the power tool includes a second power tool
- the load information acquiring module 310 includes a recording unit 311 for recording load information of the second power tool to complete the preset job
- the load information acquiring module 310 further includes
- the average load value calculation unit 312 is configured to calculate an average load value when the second power tool is operated according to the recorded load information
- the remaining work 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. Calculate the number of preset jobs that the power supply can complete according to the available remaining power and the average load value of the power source.
- the recording unit 311 in the load information acquiring module 310 records the working 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 working current during the working time.
- the preset condition may be that the current reaches a preset value or the first derivative or the high order derivative of the current reaches a preset condition.
- the average load value calculation unit 312 can calculate the total amount of power of one screw of the electric wrench by integrating the real-time current with time, and calculate the average working current of one screw according to the working time and the total electric quantity.
- the remaining workload calculation module 570 can calculate a number of holes, a few screws, or loosen a few screws according to the available remaining power of the power source and the average operating current for completing a job.
- the calculation method of the remaining power of the power source can be used to calculate the remaining power source to complete the operation time according to the average working current of the power tool during the actual operation of the power tool, and the result is more accurate. In this embodiment, the method is avoided. Due to the difference in the size of the screw or the material of the plate, the actual working current is different, and the calculation result is inaccurate.
- the prior art calculates the power supply remaining working time by identifying the type of the power tool or calculates the power supply according to the historical operating condition parameter of the tool. There is a certain amount of error in the method of remaining power.
- the real-time working current when the tool is operated is calculated, and the average operating current after the starting is calculated according to the real-time working current, and the calculation structure is more accurate.
- the average operating current in this embodiment is closer to the real-time operating current of the power tool, and the calculation result is more accurate.
- a power supply management system for a power tool further includes a remaining power acquisition module 320 and a communication module, wherein the remaining power acquisition module 320 is configured to acquire a remaining power of the power source.
- the communication module is configured to obtain historical operating condition parameters of the power stored in the power source.
- a communication module is provided in the power source for data transmission with the communication module of the power tool, and the data transmitted includes, but is not limited to, historical operating condition parameters of the power source.
- the available remaining power acquisition module 540 is configured to calculate the available remaining power of the power supply according to the remaining power of the power source acquired by the remaining power acquiring module 320 and the historical operating condition parameter of the power source.
- the power tool capable of calculating the remaining working time of the power source further includes a storage module 560, configured to pre-store the correspondence between the manufacturer and the historical operating condition parameter of the power source and the power capacity attenuation, and the available remaining power acquiring module 540 blocks are used to determine the capacity attenuation of the power supply according to the correspondence between the manufacturer and the historical operating condition parameters of the power supply and the capacity attenuation, and calculate the available remaining power of the power supply according to the capacity attenuation of the power supply.
- the correspondence can be obtained through a simulation experiment test.
- the power tool and the power source directly perform data transmission to obtain power. Vendor and historical operating parameters.
- the historical operating parameter of the power source includes at least one of a charge and discharge number, a charge rate, a charge cutoff voltage, a charge current, a discharge current, a discharge cutoff voltage, and a power supply temperature.
- the power source comprises a recording component for recording the discharge condition of the power source, and analyzing the capacity attenuation of the power source according to the discharge condition of the power source.
- the recording component records the maximum current and the discharge time when the power source is discharged, and analyzes the capacity attenuation of the power source according to the recorded data.
- the invention determines the capacity attenuation of the power source through the historical working condition parameter of the power source, and corrects the remaining capacity of the power source, so that the remaining capacity of the power source is calculated more accurately, and the user can relatively accurately know the remaining capacity of the power source.
- the user can also know the remaining working time of the power source, so that the user can know the power usable time in time and prepare the standby power source in advance, so as not to affect the work efficiency and waste time.
- the calculation method is more accurate for different types of power tools, and the calculation result is more accurate. For the garden power tools with relatively stable power consumption, the real-time detection of the power tool is started.
- the working current is used as the average operating current of the power tool, and the remaining working time of the power source is calculated.
- the remaining working time of the power supply can be calculated by calculating the average working current after the power tool is started, or the remaining working power of the power supply can be calculated according to the average working current of the power tool to complete the operation.
- Set the number of jobs In the present invention, by separately calculating the power tools of different power consumption categories, the user can know the time and the number of jobs that the power tool can operate under the different working conditions of the power supply.
- the electric device may include all devices that are powered by their own stored energy source to maintain their own operation.
- the electric device may be a digital device such as a mobile phone, a tablet, a computer, or the like, or may be a power tool such as an electric drill, a lawn mower, or a chainsaw.
- the power source in the electric device is a rechargeable lithium power source. Referring to Figure 11, the method includes the following steps:
- step S110 the remaining power of the power source is determined.
- the step of determining the remaining power of the power source includes the following sub-steps, as shown in FIG.
- step S210 the charging power of the power source is calculated.
- the lithium battery charger is generally CC/CV charging, and its constant current source principle block diagram is shown in Figure 13.
- the charging power Q c of the charging power source is equal to the result of integrating the charging current I with respect to the time t and multiplying by the charging efficiency ⁇ as follows:
- Step S220 determining the total power of the power source according to the power amount before the power source is charged and the power amount of the power source.
- the total power Q t of the power supply is equal to the sum of the power before the power is charged, that is, the sum of the last available remaining power Q r and the charged power Q c , as follows:
- step S230 the discharged power of the power source is calculated.
- the discharge amount and the charge amount are calculated in the same manner, and the integration result of the discharge current versus time is used as the real-time discharge amount Q d .
- Step S240 determining the remaining power of the power source according to the total power of the power source and the discharged power.
- the remaining power of the power supply is equal to the total power Q t of the power supply minus the real-time discharge power Q d .
- the remaining power determined in this way has a higher accuracy.
- Step S120 Obtain a historical operating condition parameter of the power source.
- the historical operating parameter of the power source includes at least one of a charge and discharge number, a charge rate, a charge cutoff voltage, a discharge current, a discharge cutoff voltage, and a power supply temperature.
- the charging magnification, the charging cutoff voltage, the discharging current, the discharging cutoff voltage, and the power supply temperature all correspond to the charging and discharging parameters in the history of charging and discharging.
- the parameters can be selected according to the actual required control accuracy. In an embodiment, the above parameters may be acquired simultaneously to determine the amount of capacity attenuation of the power source.
- Step S130 determining a capacity attenuation amount of the power source according to a historical operating condition parameter of the power source.
- the capacity attenuation amount of the power source is determined according to historical operating condition parameters of the power source, such as the number of times of charging and discharging of the power source and the ambient temperature.
- the correspondence between the historical operating condition parameter of the power source and the capacity attenuation amount is stored in advance.
- Correspondence can be stored in tabular form or stored in a mathematical model. The correspondence can be obtained through a simulation experiment test.
- Step S140 determining the current available remaining power of the power source according to the remaining power of the power source and the capacity attenuation amount.
- the current available remaining power of the power supply is determined, which can ensure that the actually available available remaining power is the amount of power that the actual user can use, which can meet the user's use requirements and has high accuracy.
- step S150 the available remaining power is output.
- the remaining power can be directly output to the processing module for related processing to further obtain other target parameters, such as sustainable working hours.
- the available remaining power can also be output through the display module, so that the user can intuitively view the available remaining power of the electric device. Due to the high accuracy of the available remaining power, the user can accurately understand the available remaining power of the electric device, so that the user can plan the power in advance to meet the user's use requirements.
- the electric power management method of the electric device determines the capacity attenuation of the power supply according to the historical operating condition parameters of the power supply, such as the ambient temperature during the charging and discharging process of the power supply, the number of times of charging and discharging of the power supply, and the discharging current.
- the amount so as to accurately determine the available remaining power that can actually be used by the user based on the remaining capacity and capacity attenuation. That is, the above method determines the real-time available remaining power according to the use time of the power source (corresponding to the number of charge and discharge times) and the historical use environment (corresponding to the ambient temperature), so that the value of the available remaining power is relatively accurate and can satisfy The actual usage needs of the user.
- the foregoing method further includes steps S410-S430 on the basis of the foregoing embodiment, as shown in FIG.
- Step S410 obtaining a current discharge current of the power source.
- the current discharge current of the power source is detected by a detecting device such as a current sensor.
- the discharge current of the power source is in a changing state, so the average value of the discharge current in the preset time interval can be counted as the discharge current of the power source.
- the preset time interval can be set from 1 to 10 s. Too short a preset time interval will cause the display to be too fast, and the data will be frequently blinked and the eyes will not be clear.
- Step S420 calculating the sustainable working time of the electric device under the current working condition according to the discharge current and the available remaining power.
- the sustainable power supply time of the power supply under the current operating conditions that is, the sustainable working time of the electric equipment. Due to the high accuracy of the available remaining power, it is possible to ensure a more sustainable working time. Moreover, the sustainable working time will be updated in real time according to the change of the discharge current, that is, the load, and the real-time performance is better, which can better meet the user's use requirements.
- step S430 the sustainable working time is displayed.
- the user can know the usage of the power supply, so that the follow-up work can be planned and laid out in advance to meet the user's use requirements.
- the electric device can display the continuous working time separately, and can also display the sustainable working time and the available remaining power at the same time.
- the embodiment of the invention further provides a power source power management system for a power tool, and a structural block diagram thereof is shown in FIG.
- the power management system includes a remaining power determination module 510, a historical operating condition parameter acquisition module 520, a capacity attenuation amount determination module 530, an available remaining power calculation module 540, and an output module 550.
- the remaining power determination module 510 is configured to determine the remaining power of the power source.
- the remaining power determining module 510 includes a charged power calculating unit 610, a total power determining unit 620, a discharged power calculating unit 630, and a remaining power determining unit 640, as shown in FIG.
- the charging power calculation unit 610 is configured to calculate the charging power of the power source.
- the charge level of the power supply is equal to the result of the charge current versus time integration and multiplied by the charge efficiency.
- the total power amount determining unit 620 is connected to the charging power amount calculating unit 610 for determining the total power amount of the power source according to the power amount before the power source is charged and the charging power amount.
- the discharged electricity amount calculation unit 630 is for calculating the discharge amount of the power source.
- the discharge capacity of the power supply is equal to the integration of the discharge current with time.
- the remaining power amount determining unit 640 is connected to the total power amount determining unit 620 and the discharging power amount calculating unit 630, respectively, for determining the remaining power amount of the power source based on the total power amount of the power source and the discharged power amount.
- the remaining power determined by the remaining power determination module 510 of the above configuration has a higher accuracy.
- the historical operating condition parameter obtaining module 520 is configured to obtain historical operating condition parameters of the power supply.
- the historical operating parameter of the power source includes at least one of a charge and discharge number, a charge rate, a charge cutoff voltage, a discharge current, a discharge cutoff voltage, and a power supply temperature. Therefore, the historical working condition parameter obtaining module 520 can set a corresponding historical working condition parameter collecting unit, for example, setting a charging and discharging number counting unit and a temperature detecting unit.
- the capacity attenuation amount determining module 530 is connected to the historical operating condition parameter obtaining module 520.
- the capacity attenuation amount determining module 530 is configured to determine the capacity attenuation amount of the power source according to historical operating condition parameters acquired by the historical operating condition parameter obtaining module 520, such as the number of charging and discharging times and the ambient temperature.
- the system further includes a storage module 560.
- the storage module 560 is used for the correspondence between the historical operating parameter of the power source and the capacity attenuation amount. Therefore, the capacity attenuation amount determining module 530 can determine the capacity attenuation amount under the current operating condition according to the correspondence relationship.
- the available remaining power calculation module 540 is respectively connected to the remaining power determination module 510 and the capacity attenuation amount determination module 530 for determining the current available remaining power of the power source according to the remaining power of the power source and the capacity attenuation amount. According to the remaining power and capacity attenuation value of the power supply, the current available remaining power of the power supply is determined, which can ensure that the actually available available remaining power is the amount of power that the actual user can use, which can meet the user's use requirements and has high accuracy.
- the output module 550 is coupled to the available remaining power calculation module 540 for outputting the available remaining power.
- the output module 550 can be a transmission device for outputting the available remaining power calculated by the available remaining power calculation module 540 to other processing modules for further processing to obtain corresponding target parameters.
- the output module 550 can also be a display module to display the available remaining power.
- the display module can be an LED display, an LCD display, or a power indicator.
- the power management system of the electric device determines the capacity attenuation of the power supply according to the historical operating condition parameters of the power supply, such as the ambient temperature during the charging and discharging process of the power supply, the number of times of charging and discharging of the power supply, and the discharging current. The amount, so as to accurately determine the available remaining power that can actually be used by the user based on the remaining capacity and capacity attenuation.
- the above system determines the real-time available remaining power according to the power usage time (corresponding to the number of charge and discharge times), the historical use environment (corresponding to the ambient temperature), and the magnitude of the load (corresponding to the discharge current), thereby making the The value of available available power is relatively accurate and can meet the actual usage needs of users.
- the power management system further includes a sustainable working time calculation module 570, a current detecting module 580, and a display module 590, as shown in FIG.
- the sustainable working time calculation module 570 is connected to the available remaining power calculation module 540 and the current detection module 580, respectively.
- the current detecting module 730 is configured to detect a current discharge current of the power source.
- the current detecting module 730 can be implemented by a detecting device such as a current sensor.
- the sustainable working time calculation module 570 is configured to calculate the sustainable working time of the electric device under current working conditions according to the discharging current and the available remaining power. Due to the high accuracy of the available remaining power, it is possible to ensure a more sustainable working time.
- Display module 590 is used to display the sustainable working time.
- the display module 590 can display the continuous working time separately, and can also display the sustainable working time and the available remaining power at the same time.
- the user can know the usage of the power supply, so that the subsequent work can be planned and laid out in advance, which can well meet the user's use requirements.
- An embodiment of the invention also provides an electric device.
- the electric device includes an apparatus body and the power management system described in any of the foregoing embodiments.
- the power management system Through the power management system, the user can accurately know the actual available remaining power of the electric device and the sustainable working time. For example, how many holes can be drilled by the electric drill, how long the lawn mower can cut the grass, how long the leaves are repaired, etc., so that the user can arrange the work.
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Abstract
一种电动工具的电源电量管理方法,所述电动工具包括电源,向所述电动工具提供电能,还包括:获取电源的剩余电量(S1);获取所述电动工具作业时的负载信息(S2);根据所述电源的可用剩余电量和所述负载信息计算所述电源的剩余作业量(S3)。根据电动工具负载信息计算电源的剩余作业量,特别的,可根据电动工具的功耗类型采用不同的计算方法,较为精确的计算电源的剩余作业量,同时,对于不同类型的电动工具,还选择性的显示剩余工作时间或者剩余工作数量,便于用户提前计划好工作量或者提前准备好足够的电源包,避免不必要的时间浪费,提高工作效率。
Description
本发明属于电动工具技术领域,具体涉及一种电动工具的电源电量管理方法和系统。
电动工具通常与外部的电源配接,由电源为其提供电能进行工作。传统的电动工具采用电量显示的方式不够直观,用户很难准确获知何时进行电源更换或者何时对电源进行充电,给用户使用带来不便,且传统电源电量通常通过采集电源电压的方法。这种方法得到的电源电量极不准确。
在现有技术中,电源包上设置有剩余工作时间显示装置,用以显示电源包的剩余工作时间,电源包内设置有识别装置,可识别与其配接的电动工具的类型并计算电源包可提供该电动工具工作的时间。现有技术根据电动工具的类型计算电源包剩余工作时间,结果不准确,原因是即使是同一类型的电动工具,由于作业时的工况不同,电源剩余工作时间也不同,例如,电动扳手打螺钉,螺钉的大小,板材的材料都会影响负载,进而影响电源包的剩余工作时间,因而,现有技术通过电动工具类型计算电源剩余工作时间的结果很不准确。
发明内容
为克服现有技术的缺陷,本发明所要解决的问题是提供一种电动工具的电源电量管理方法和系统,可根据电动工具的负载信息较为精确的计算电源的剩余作业量。
本发明解决现有技术问题所采用的技术方案是:
一种电动工具的电源电量管理方法,所述电动工具包括电源,向所述电动工具提供电能,包括:
获取电源的可用剩余电量;
获取电动工具作业时的负载信息;
根据所述电源的可用剩余电量和所述负载信息计算所述电源的剩余作业量。
优选的,所述剩余作业量包括剩余工作时间和剩余工作数量。
优选的,所述方法还包括:
根据所述电动工具的类型选择性的显示电源的剩余工作时间和剩余工作 数量中的至少一种。
优选的,所述电动工具包括负载随时间变化不明显的第一电动工具和负载随时间变化明显的第二电动工具中的至少一种。
优选的,所述获取所述电动工具作业时的负载信息;根据所述电源的可用剩余电量和所述负载信息计算所述电源的剩余作业量的步骤包括:
获取所述第一电动工具作业时的实时负载信息;
根据所述电源的可用剩余电量和实时负载信息计算所述电源的剩余作业量。
优选的,所述第一电动工具为除草工具,所述剩余工作数量为电源的可用剩余电量可维持第一电动工具除草的面积。
优选的,所述获取所述电动工具作业时的负载信息;根据所述电源的可用剩余电量和所述负载信息计算所述电源的剩余作业量的步骤包括:
所述第二电动工具启动后,记录所述第二电动工具作业时的负载信息;
根据记录的所述负载信息计算所述第二电动工具作业时的平均负载值;
根据所述电源的可用剩余电量和所述平均负载值计算所述电源的剩余工作时间。
优选的,所述根据记录的所述负载信息计算所述第二类电动工具作业时的平均负载值的步骤包括:
获取记录的所述第二电动工具在第一工作时间内的实时负载信息,采用积分法计算在第一工作时间内的第一耗电量;
获取记录的所述第二类电动工具在第二工作时间内的实时负载信息,采用积分法计算在第二工作时间内的第二耗电量;
根据所述第一耗电量和第二耗电量计算所述第一工作时间和第二工作时间内的总耗电量;
获取所述第一工作时间和第二工作时间的总时间,根据所述总时间和总耗电量计算所述第二电动工具作业时的平均负载值。
优选的,所述根据记录的所述负载信息计算所述第二电动工具作业时的平均负载值的步骤包括:
获取记录的所述第二电动工具在第一工况下的实时负载信息,采用积分法计算所述第二电动工具在第一工况下的第一耗电量;
获取记录的所述第二电动工具在第二工况下的实时负载信息,采用积分 法计算所述第二电动工具在第二工况下的第二耗电量;
根据所述第一耗电量和第二耗电量计算第一工况和第二工况下的总耗电量;
获取所述第一工况和第二工况的总时间,根据所述总时间和总耗电量计算第一工况和第二工况下的平均负载值。
优选的,所述获取所述电动工具作业时的负载信息;根据所述电源的可用剩余电量和所述负载信息计算所述电源的剩余作业量的步骤包括:
记录所述第二电动工具完成预设作业的负载信息;
根据记录的所述负载信息计算所述第二电动工具完成预设作业时的平均负载值;
根据所述电源的可用剩余电量和所述平均负载值计算所述电源的剩余工作数量。
优选的,所述记录所述第二电动工具完成预设作业的负载信息,根据记录的所述负载信息计算所述第二电动工具完成预设作业时的平均负载值的步骤包括:
记录所述第二类电动工具从开始预设作业至负载信息满足预设条件时的时间和负载信息;
根据所述时间和负载信息利用积分法计算完成预设作业的总电量;
根据所述时间和总电量计算完成预设作业时的平均负载值。
优选的,所述预设作业包括钻孔,打螺钉或拧松螺钉中的至少一种,所述剩余工作数量包括所述电源的可用剩余电量可维持第二电动工具钻孔的个数、打螺钉的个数或者拧松螺钉的个数中的至少一种。
优选的,所述获取所述电源的可用剩余电量的步骤包括:
获取所述电源的剩余电量;
获取所述电源的厂商和历史工况参数;
根据所述电源的厂商和历史工况参数计算所述电源的容量衰减量;
根据所述电源的剩余电量和所述电源的容量衰减量计算所述电源的可用剩余电量。
优选的,所述获取所述电源的可用剩余电量的步骤还包括:
记录所述电源的放电电流,根据记录的所述放电电流计算所述电源的容量衰减量。
优选的,所述电源的历史工况参数包括充放电次数、充电倍率、充电截止电压、充电电流、放电截止电压和电源温度中的至少一种参数。
优选的,还包括:
读取所述电动工具的识别模块提供的识别信息以识别所述电动工具的类型,根据所述电动工具的类型选择性的显示电源的剩余工作时间和剩余工作数量中的至少一种。
优选的,还包括:
通过所述电源的识别模块与外部设备通信,更新所述识别模块内的识别信息。
优选的,还包括步骤:
预先存储所述电源的历史工况参数与容量衰减量的对应关系;
根据所述电源的历史工况参数与容量衰减的对应关系确定所述电源的容量衰减量;
根据所述电源的容量衰减计算所述电源的可用剩余电量。
优选的,所述获取所述电源的剩余电量的步骤包括:
计算电源的充电电量;所述电源的充电电量等于充电电流对时间积分的结果再乘以充电效率;
根据电源充电前的电量和所述充电电量确定电源的总电量;
计算电源的放电电量;所述电源的放电电量等于放电电流对时间的积分;
根据所述电源的总电量和所述放电电量确定所述电源的剩余电量。
优选的,所述电源包括电池包和背包电池包。
本发明还保护一种电动工具的电源电量管理系统,所述电动工具包括电源,所述电源向所述电动工具提供电能,还包括:
可用剩余电量获取模块,用于获取电源的可用剩余电量;
负载信息获取模块,用于获取所述电动工具作业时的负载信息;
剩余作业量计算模块,分别连接所述电源可用剩余电量获取模块和所述负载信息获取模块,用于根据所述电源的剩余电量和负载信息计算所述电源的剩余作业量。
优选的,所述剩余作业量包括剩余工作时间和剩余工作数量。
优选的,还包括显示模块,用于根据所述电动工具的类型选择性的显示电源的剩余工作时间和剩余工作数量中的至少一种。
优选的,所述电动工具包括负载随时间变化不明显的第一电动工具和负载随时间变化明显的第二电动工具中的至少一种。
优选的,所述负载信息获取模块用于获取所述第一电动工具作业时的实时负载信息;
所述剩余作业量计算模块分别连接所述电源可用剩余电量获取模块和所述负载信息获取模块,并根据所述电源的剩余电量和实时负载信息计算所述电源的剩余作业量。
优选的,所述第一电动工具为除草工具,所述剩余工作数量为电源的可用剩余电量可维持第一电动工具除草的面积。
优选的,所述负载信息获取模块包括记录单元,用于第二电动工具启动后,记录所述第二电动工具作业时的负载信息;
所述负载信息获取模块还包括平均负载值计算单元,用于根据记录的所述负载信息计算所述第二电动工具作业时的平均负载值;
所述剩余作业量计算模块分别连接所述电源可用剩余电量获取模块、所述记录单元和所述平均负载值计算单元,根据所述电源的剩余电量和所述平均负载值计算所述电源的剩余工作时间。
优选的,所述负载信息获取模块包括记录单元,用于记录所述第二电动工具完成预设作业的负载信息;
所述负载信息获取模块还包括平均负载值计算单元,用于根据记录的所述负载信息计算所述第二电动工具作业时的平均负载值;
所述剩余作业量计算模块分别连接所述电源可用剩余电量获取模块、所述记录单元和所述平均负载值计算单元,根据所述电源的剩余电量和所述平均负载值计算所述电源的剩余工作数量。
优选的,所述预设作业包括钻孔,打螺钉或拧松螺钉中的至少一种,所述剩余工作数量包括所述电源的可用剩余电量可维持第二电动工具钻孔的个数、打螺钉的个数或者拧松螺钉的个数中的至少一种。
优选的,还包括:
剩余电量获取模块,用于获取所述电源的剩余电量;
通信模块,用于获取所述电源内存储的电源的厂商和历史工况参数;
所述电源可用剩余电量获取模块,用于根据所述电源的剩余电量和所述电源的历史工况参数计算所述电源的可用剩余电量。
优选的,还包括存储模块,用于预先存储所述电源的厂商和历史工况参数与容量衰减量的对应关系;
所述可用剩余电量获取模块用于根据所述电源的厂商和历史工况参数与容量衰减的对应关系确定所述电源的容量衰减量,并根据所述电源的容量衰减计算所述电源的可用剩余电量。
优选的,还包括识别模块,用于识别所述电动工具的类型。
优选的,所述电源包括电池包和背包电池包。
与现有技术相比,本发明的有益效果是:本发明根据电源的历史工况参数计算电源的容量衰减,对电源的剩余容量进行修正,从而相对于现有技术获得较为精确的电源剩余容量。本发明中,根据电动工具负载信息计算电源的剩余工作时间,特别的,可根据电动工具的负载类型采用不同的计算方法,较为精确的计算电源的剩余工作时间和剩余工作数量,对于不同的种类的电动工具采用不同的显示方式,特别的,对于负载随时间变化明显的第二电动工具,通过计算可用剩余电量可完成预设作业的数量,便于用户更直观的了解电源剩余电量可作业的情况,使得用户可提前计划好工作量或者提前准备好足够的电源,避免不必要的时间浪费,提高工作效率。
以上所述的本发明的目的、技术方案以及有益效果可以通过下面附图实现:
图1是本发明一实施例中的电动工具的电源电量管理方法的流程图。
图2是图1中的步骤S1的具体流程图。
图3是图2中的步骤S11的另一具体流程图。
图4是图1的具体流程图。
图5是图1中的步骤S2的一具体流程图。
图6是图1中的步骤S2的另一具体流程图。
图7是图5中的步骤S202的一具体流程图。
图8是图5中的步骤S202的另一具体流程图。
图9是图1中的步骤S2的另一具体流程图。
图10是本发明一实施例中的电动工具的电源电量管理系统的原理框图。
图11是本发明一实施例中的电动工具的电源电量管理方法的流程图。
图12是图11中的步骤S110的具体流程图。
图13是图11中的电动设备的电池的恒流源原理框图。
图14是另一实施例中的电动工具的电源电量管理方法的流程图。
图15是一实施例中的电动工具的电源电量管理系统的原理框图。
图16为图15中的剩余电量确定模块的原理框图。
为使本发明的上述目的、特征和优点能够更加明显易懂,下面结合附图对本发明的具体实施方式做详细的说明。在下面的描述中阐述了很多具体细节以便于充分理解本发明。但是本发明能够以很多不同于在此描述的其它方式来实施,本领域技术人员可以在不违背本发明内涵的情况下做类似改进,因此本发明不受下面公开的具体实施例的限制。
需要说明的是,当元件被称为“固定于”另一个元件,它可以直接在另一个元件上或者也可以存在居中的元件。当一个元件被认为是“连接”另一个元件,它可以是直接连接到另一个元件或者可能同时存在居中元件。
除非另有定义,本文所使用的所有的技术和科学术语与属于本发明的技术领域的技术人员通常理解的含义相同。本文中在本发明的说明书中所使用的术语只是为了描述具体的实施例的目的,不是旨在于限制本发明。本文所使用的术语“及/或”包括一个或多个相关的所列项目的任意的和所有的组合。
图1为本发明一实施例中的电动工具的电源电量管理方法的流程图。本发明的电动工具,包括割草机,打草机,修枝剪,吹吸机,链锯,智能割草机,吸尘器,电钻,电锤,电动扳手,角磨,电圆锯或往复锯等。本发明电动工具根据负载随时间变化是否明显可以分为第一电动工具和第二电动工具。其中,割草机,打草机,修枝剪,吹吸机,链锯等电动工具在工作时,负载随时间的变化不明显,即该类电动工具的工况比较稳定,不会有间断性的大功率的情况,本发明称为第一电动工具。而电钻,电锤,电动扳手,角磨,电圆锯或往复锯等电动工具作业时负载随时间的变化很明显,工况不稳定,例如,电钻在钻孔的过程中,电流逐渐变大,完成一个孔时,电流变为零,周期性循环,即该类电动工具负载随时间变化明显,即为本发明第二电动工具。
本发明电动工具包括电源,电源为电动工具提供电能。本发明电动工具 的电源电量测量方法包括以下步骤:
步骤S1:获取电源的可用剩余电量。电源的可用剩余电量是指电源实际能放出的电量,因电池在充放电过程中会对电源有一定的损耗,即电源会有一定程度的老化,因此,需要对电源的剩余电量进行修正,以获得较为精确的可用剩余电量。
步骤S2:获取电动工具作业时的负载信息。
在本发明中,电动工具内设有电流检测单元,用以检测或者记录电动工具作业时的工作电流。其中,本领域技术人员可知的,该电流检测单元既可设置于电源内,又可设置在电动工具非电源的其他部分,即可设置在电动工具的工具本体内。
步骤S3:根据电源的可用剩余电量和负载信息计算电源的剩余作业量。
在本发明中,剩余作业量包括剩余工作时间和剩余工作数量。
优选的,在其中一实施例中,还包括显示模块,可根据电动工具的类型选择性的显示电源的剩余工作时间和剩余工作数量中的至少一种。具体的,电动工具根据电流检测单元检测的工具作业时的工作电流和电源的可用剩余电量计算电源的剩余工作时间和剩余工作数量,并根据电动工具的类型选择性的显示剩余工作时间或者剩余工作数量或者两者依次显示或者同时显示。本领域技术人员可知的,电源和工具本体之间可以进行数据传输,用以传输工作电流、电源的剩余电量或者电源的其他参数,例如电源的厂商和历史工况参数等。
本发明中,通过电源的可用剩余电量和工作电流计算电源的剩余工作时间或者剩余工作数量,并根据需要选择性的显示,对于没有经验或经验不丰富的用户,通过显示电源剩余工作时间或者剩余工作数量,便于用户提前计划好工作量或者提前准备好足够的电源包,避免用户即使知道可用剩余电量也无法估计剩余工作时间,造成不必要的时间浪费,提高工作效率。
上述实施例中,步骤S1,获取电源的可用剩余电量的步骤,在现有技术中采用的是基于电压的电量检测,这个方法的基本思路是对不同电压我们采用不同的格数来表示电源的容量,这种方法精度比较差。为了获得较为准确的可用剩余电量,本发明采用阻抗法计算电源的可用剩余电量,因为电源的内阻受到温度,电荷状态及电源老化程度的影响,电源内阻在100次充放电之后会增加一倍,且电源内阻会随温度的降低而增加,因此需要对电源的可 用剩余电量进行修正,以获取较为精确的可用剩余电量。在本实施例中,步骤S1:获取电源的可用剩余电量的具体步骤如下,请参考如2所示:
步骤S11:获取电源的剩余电量;
步骤S12:获取电源的厂商和历史工况参数。
本发明中,电动工具包括电源和工具本体,电动工具的电源和工具本体之间进行数据传输,传输的数据包括电源的厂商和电源的历史工况参数,电源的历史工况参数包括电源充放电次数,充电倍率、充电截止电压,充电电流,放电电流,放电截止电压和电源温度中的至少一种参数。其中,充电倍率、充电截止电压、放电电流、放电截止电压和电源温度均为对应于历史充放电过程中的充放电参数。可以根据实际需要的控制精确度来对各参数进行选择。且对于不同的厂商,电源的容量衰减不同,例如,不同的厂商,即使电源充放电次数,电源充电截止电压,放电截止电压及充电倍率等相同,电源的容量衰减也可能不同,因此,本发明中电动工具和电源直接进行数据传输,获取电源的厂商和历史工况参数,根据电源的厂商和历史工况参数分析确定电源的容量衰减。
优选的,电源包括记录组件,用以记录电源的放电情况,根据电源的放电情况分析电源的容量衰减。具体的,记录组件记录电源放电时的最大电流及放电时间,根据记录的数据分析电源的容量衰减。
在本发明的一实施例中,可以同时获取上述参数以确定电源的容量衰减量。
步骤S13,根据电源的厂商和历史工况参数计算电源的容量衰减量。
根据电源的厂商和历史工况参数的对应关系确定电源的容量衰减量,计算的容量衰减量更为精确,从而得到的可用剩余电量更为精确。在本实施例中,会预先存储电源的历史工况参数与容量衰减量的对应关系,以及历史工况参数与电源厂商的对应关系。对应关系可以以表格形式进行存储,也可以通过数学模型进行存储。该对应关系可以通过模拟仿真实验测试进行获取。
步骤S14,根据电源的剩余电量和容量衰减量计算电源的可用剩余电量。
根据电源的剩余电量和容量衰减量来确定电源当前的可用剩余电量,可 以确保实际获得的可用剩余电量为实际用户所能够使用的电量,能够满足用户使用需求且准确度较高。
上述实施例中,如图3所示,步骤S11,获取电源的剩余电量的步骤还包括:
步骤S111,计算电源的充电电量;
电源的充电电量等于充电电流对时间积分的结果再乘以充电效率;锂电充电器一般是CC/CV充电。充电电池的充电电量Q
c等于充电电流I对时间t积分的结果再乘以充电效率η,如下式:
步骤S112,根据电源充电前的电量和充电电量确定电源的总电量;
电池的总电量Q
t等于电池充电前的电量也即上一次的剩余电量Q
r和充电电量Q
c之和,如下式:
步骤S113,计算电源的放电电量。
放电电量和充电电量的计算方式相同,采用放电电流对时间的积分结果作为实时的放电电量Q
d。
步骤S114,根据电源的总电量和放电电量确定电池的剩余电量。
电池的当前电量等于电池的总电量Q
t减去实时的放电电量Q
d。
采用这种方式确定的剩余电量具有较高的准确度。
在本发明的另一实施例中,上述图1的实施例中的一具体步骤如下,请参考图4所示,
步骤S31:根据电源的可用剩余电量和负载信息计算电源的剩余工作时间。
对于第一电动工具,如割草机,打草机,修枝剪,吹吸机,链锯等,由于负载随时间的变化不明显,且用户可通过剩余作业时间更直观的了解电源可用剩余电量的作业情况。
步骤S4:根据电源的可用剩余电量和负载信息计算电源的剩余工作数量。
对于本发明第二电动工具,如电钻,电锤,电动扳手等,根据电源的可用剩余电量和负载信息计算电源的剩余工作数量,具体的,计算与电钻配接的电源还可钻几个孔,与电锤配接的电源还可打几个螺钉等,用户可更好的了解剩余工作数量,提前做好规划,避免不必要的时间浪费,提高工作效率。
步骤S5:根据电动工具的类型选择性的显示电源的剩余工作时间或剩余工作数量。
优选的,在本发明的一实施例中,电动工具可选择性的显示电源的剩余工作时间或者剩余工作数量。在其中一实施例中,用户可根据需要,手动选择电动工具显示电源的剩余工作时间或者剩余工作数量。在另一实施例中,电动工具可自动识别工具的类型,若是第一电动工具,则自动显示电池的剩余工作时间,若是第二电动工具,则自动显示电源的剩余工作数量。
在另一实施例中,电源包括识别组件,电动工具主体内设置有识别模块,电源的识别组件识别电动工具主体内识别单元内的识别信息,并根据识别信息识别电动工具的类型。若识出是第一电动工具,则自动显示电源的剩余工作时间,若识别出是第二电动工具,则自动显示电源的剩余工作数量。优选的,电源可以与外部设备进行通讯,及时更新电源识别模块内的识别信息。具体的,电源的内的识别模块可与外部的手机,电脑,pad等终端设备之间进行数据传输,及时更新电源识别模块内的识别信息,使得电源的扩展性提高,电源可以识别更多种类的电动工具。
上述实施例中,电源的剩余工作时间或者剩余工作数量还可以传输给外部移动终端,用过外部移动终端进行显示,显示方式更为方便。
本发明可自动识别工具的类型,根据工具不同的类型自动选择显示电源的剩余工作时间或者电源的剩余工作数量。取得了人机效果更好,智能化更高的效果,同时提高了工作效率。
在本发明的一实施例中,对于第一电动工具,如花园类电动工具,包括割草机,打草机,吹吸机,链锯等作业时工况相对比较稳定,即该类电动工具作业时工况波动不是很大,可以通过电动工具的实时负载信息代替平均负载值。如图5所示,步骤S2:获取电动工具作业时的负载信息的步骤包括以下子步骤:
步骤S21:获取第一电动工具作业时的实时负载信息。
本发明中,负载信息主要表现为电流信息,即获取花园类电动工具作业时的实时工作电流,因花园类电动工具工况比较稳定,功耗也比较稳定,因此可将该实时工作电流近似为平均工作电流。
步骤S22:根据电源的可用剩余电量和实时负载信息计算电源的剩余工作时间。
由上述步骤S1可计算可用剩余电量Q
剩,根据实时电流对时间的积分可以得出可用剩余电量Q
剩在该电流下可持续工作的时间,如下式:
在本发明一实施例中,对于第一电动工具,如割草机,打草机,吹吸机和链锯等,电源安装于割草机等第一电动工具为其提供电能时,启动电动工具,当电动工具稳定工作后,获取电动工具的一实时工作电流,因电动工具稳定工作后,其工况相对稳定,因此可将该实时工作电流近似作为上述电动工具的平均工作电流,根据该实时工作电流及电源可用剩余电量计算电源剩余工作间时间,用户根据剩余工作时间可提前准备要替换的电源。
优选的,在上述实施例中,还可根据电源的可用剩余电量和实时负载信息计算电源的剩余工作数量。具体的,第一电动工具为除草工具,剩余工作数量为电源的可用剩余电量可维持第一电动工具除草的面积。第一电动工具作业时,获取电动工具的实时工作电流作为平均工作电流,通过单位电量除以平均工作电流来获取单位电量的可工作时间,根据单位电量的可工作时间乘以单位时间内的可作业面积得到单位电量的可作业面积。根据上述实施例中获得的电源可用剩余电量乘以单位电量的可工作时间来计算电源的剩余工作时间,另外,根据电源的剩余工作时间乘以单位时间内的可作业面积计算电源所能工作的面积。
在发明的另一实施例中,对于第二电动工具,如电钻,电锤,电动扳手,角磨,电圆锯或往复锯等电动工具,作业时功耗不稳定,如电钻在不同的材料上钻孔时,电流不同,功耗也不同,可能存在低功耗,中功耗或者高功耗中等情况。电动扳手在打螺钉时,不同大小的螺钉,电流大小不同,或者在不同的材料上打螺钉,材料不同也会导致电流不同,功耗也不同。在本实施例中,步骤S2:获取电动工具作业时的负载信息的步骤包括以下子步骤,如图6所示:
步骤S201:第二电动工具启动后,记录第二电动工具作业时的负载信息;
第二电动工具启动后,实时记录电动工具作业时的负载信息,优选的,实时记录电动工具作业时的实时工作电流。
步骤S202:根据记录的负载信息计算第二电动工具作业时的平均负载值;
本实施例中,根据平均工作电流与剩余工作时间的乘积等于电源的可用剩余电量,通过计算工具的平均工作电流即可计算电源的剩余工作时间。
如图7所示,根据记录的负载信息计算第二电动工具作业时的平均负载值的步骤包括:
步骤S212:获取记录的第二电动工具在第一工作时间内实时负载信息,采用积分法计算在第一工作时间内的第一耗电量。
步骤S222:获取记录的第二电动工具在第二工作时间内实时负载信息,采用积分法计算在第二工作时间内的第二耗电量;
获取第二电动工具启动后记录的负载信息,根据启动后记录的负载信息计算第二电动工具在启动后的平均工作电流,根据平均工作电流和电源的可用剩余电量计算电源的剩余工作时间。具体的,将第二电动工具启动后记录的负载信息按照时间至少可分为第一工作时间t
1内的负载信息和第二工作时间t
2内的负载信息,本实施例中,负载信息为电流信息,根据t
1内实时电流对时间t
1的积分可得出第一工作时间的耗电量Q
1,根据t
2内实时电流对时间t
2的积分可得出第一工作时间的耗电量Q
2。
步骤S232:根据第一耗电量Q
1和第二耗电量Q
2计算第一工作时间t
1和第二工作时间t
2内的总耗电量Q,Q=Q
1+Q
2。
步骤S242:获取第一工作时间和第二工作时间的总时间,根据总时间和总耗电量计算第二电动工具作业时的平均负载值。
步骤S203:根据电源的可用剩余电量和平均负载值计算所述电源的剩余工作时间。
本实施例中,根据电源的可用剩余电量Q
剩等于平均工作电流对剩余工作时间的积分,可计算剩余工作时间。
对于第二电动工具,因功耗与作业对象的材料或者作业对象的大小有关,因此现有技术中通过识别电动工具的种类来计算电源剩余工作时间或者根据工具的历史工况参数来计算电源可用剩余电量的方法会存在一定的误差。本实施例中,为了精确的计算电源的剩余工作时间,从第二电动工具启动后,记录工具作业时的实时工作电流,根据实时工作电流计算启动后的平均工作电流,计算结构更为准确,且相对于历史工况信息,本实施例中的平均工作电流更接近于电动工具实时工作电流,计算结果更准确。
在本发明的另一实施例中,第二电动工具启动后可能处于不同的工况(启动后可能存在低功耗和高功耗的情况),通过计算电动工具在不同功耗下的耗电量,来计算平均负载值,如图8所示,上述步骤S202:根据记录的负载信息计算第二电动工具作业时的平均负载值的具体步骤如下:
步骤S2020:获取记录的第二电动工具在第一工况下的实时负载信息,采用积分法计算第二电动工具在第一工况下的第一耗电量;
步骤S2021:获取记录的第二电动工具在第二工况下的实时负载信息,采用积分法计算第二电动工具在第二工况下的第二耗电量;
将记录的第二电动工具的负载信息按照工况至少分为第一时间T
1内的第一工况下的电流信息和第二时间T
2内的第二工况下的电流信息。根据T
1内实时电流对时间T
1的积分可得出第一工况下的耗电量Q
11,根据T
2内实时电流对时间T
2的积分可得出第二工况下的耗电量Q
22。
步骤S2022:根据第一耗电量和第二耗电量计算第一工况和第二工况下的总耗电量;
根据第一耗电量Q
11和第二耗电量Q
22计算第一工作时间T
1和第二工作时间T
2内的总耗电量Q,Q=Q
11+Q
22。
步骤S2023:获取所述第一工况和第二工况的总时间,根据所述总时间和总耗电量计算第一工况和第二工况下的平均负载值。
根据电源的可用剩余电量Q
剩等于平均工作电流对剩余工作时间的积分,可计算剩余工作时间。
在本发明的另一实施例中,当电源安装于电锤,电钻,电动扳手等第二 电动工具上为其提供电能时,不仅可计算电源剩余工作时间,还可计算电源剩余可作业的数量,如电钻可打孔的数量,电动扳手可打螺钉的数量等。如图9所示,具体步骤如下:
步骤S2.1:记录第二电动工具完成预设作业的负载信息;
以电动扳手为例,记录电动扳手从开始打螺钉,至螺钉与材料表面齐平时的作业时间及该作业时间内的实时工作电流。为了精确的确定完成一个螺钉的时间及消耗的电量,优选的,可预先设置电流条件,电流达到预设条件时,表示螺钉与材料表面齐平。预设条件可以是电流达到预设值或者电流的一阶导数或高阶导数达到预设条件。
步骤S2.2:根据记录的负载信息计算第二电动工具完成预设作业时的平均负载值;
根据实时电流对时间的积分可计算电动扳手打完一个螺钉的总电量,根据作业时间及总电量计算完成一个螺钉的平均工作电流。
步骤S2.3:根据电源的可用剩余电量和平均负载值计算电源的剩余工作数量。
根据上述实施例中的电源的可用剩余电量和完成一个作业的平均工作电流可计算电源可用剩余电量可维持第二电动工具的剩余工作数量,即可用剩余电量可维持第二电动工具可打几个孔、打几个螺钉或者拧松几个螺钉。
上述实施例中的电源可用剩余电量的计算方法,根据电动工具作业时,完成一个作业的平均工作电流来计算剩余电源电量可完成作业的时间,其结果更为准确,本实施例中,避免了由于螺钉大小或者板材的材料不同,实际工作电流不同,而导致的计算结果不准确的问题。
上述实施例中,电源剩余工作时间或完成预设作业的数量可通过显示装置进行显示,便于用户提前获知电源的剩余使用情况,是否需要备用电源等。
优选的,上述电源的剩余工作时间或者完成预设作业的数量可通过数据传输给移动终端,用户可通过移动终端获知电源的使用情况。
上述实施例中,电源包括电池包和背包电池包,对于不同的电源,电动工具均可根据电动工具的类型选择显示电源的剩余工作时间或者剩余工作数量。且电源内识别模块中的识别信息可及时更新,扩展性提高,使得电源可识别更多种类的电动工具。对于不同的电动工具,显示方式不同,提高了用户的工作效率,其显示方式更智能,显示结果更为准确。
本发明还提供一种电动工具的电源电量管理系统,其结构框图如图10所示。该可计算电源剩余工作时间的电动工具包括可用剩余电量获取模块540,用于获取电源的可用剩余电量,负载信息获取模块310,用于获取电动工具作业时的负载信息,剩余作业量计算模块570,分别与可用剩余电量获取模块540和负载信息获取模块310连接,用于根据电源的可用剩余电量和负载信息计算电源的剩余作业量。
本发明中,电源的剩余作业量包括电源的剩余工作时间和剩余工作数量中的一种或者两种,且负载信息获取模块310包括电流检测单元,用于检测电动工具作业时的工作电流。
在本发明的另一实施例中,还包括显示模块590,用于选择性的显示电源的剩余工作时间和电源的剩余工作数量中的一种或者两种。优选的,对于第二电动工具,显示模块590显示电源的剩余工作数量。
在本发明的一实施例中,电动工具上设置有模式选择开关,用户可根据需要触发开关,选择显示电源的剩余工作时间或者电源的剩余工作数量。优选的,另一实施例中,电动工具可自动识别自身的类型,根据电动工具的类型自动选择显示电源的剩余工作时间或者电源的剩余工作数量。
优选的,在本发明的另一实施例中,电源包括识别组件,电动工具主体内设置有识别模块,电源的识别组件识别电动工具主体内识别单元内的识别信息,并根据识别信息识别电动工具的类型。若识出是第一电动工具,则显示模块590自动显示电源的剩余工作时间,若识别出是第二电动工具,则显示模块590自动显示电源的剩余工作数量。优选的,电源可以与外部设备进行通讯,及时更新电源识别模块内的识别信息。具体的,电源的内的识别模块可与外部的手机,电脑,pad等终端设备之间进行数据传输,及时更新电源识别模块内的识别信息,使得电源的扩展性提高,电源可以识别更多种类的电动工具。
上述实施例中,电源的剩余工作时间或者剩余工作数量还可以传输给外部移动终端,用过外部移动终端进行显示,显示方式更为方便。
本发明可自动识别工具的类型,根据工具不同的类型自动选择显示电源的剩余工作时间或者电源的剩余工作数量。取得了人机效果更好,智能化更高的效果,同时提高了工作效率。
本发明电动工具包括工具本体和电源,在其中一实施例中,工具本体包括负载信息获取模块310和显示模块590,负载信息获取模块310包括电流检测单元,电流检测单元检测电动工具作业时工作电流,并将检测的工作电流传输给剩余作业量计算模块570,工具本体与电源通过通信模块进行数据传输,通讯模块将电源的厂商和历史工况参数传输给工具本体,工具本体中的剩余电量获取模块320根据电源剩余电量及电源的厂商和历史工况参数计算电源的可用剩余电量,并传输给剩余作业量计算模块570,剩余作业量计算模块570根据电源的可用剩余电量和电流检测单元检测工作电流计算电源的剩余工作时间和剩余工作数量,并通过工具本体的显示模块590选择性的显示电源的剩余工作时间和剩余工作数量。
在本发明的另一实施例中,工具本体包括负载信息获取模块310,电源包括显示模块590,负载信息获取模块310包括电流检测单元,电流检测单元检测电动工具作业时工作电流,并将检测的工作电流传输给剩余作业量计算模块570,剩余电量获取模块320根据电源剩余电量及电源的厂商和历史工况参数计算电源的可用剩余电量,并传输给剩余作业量计算模块570,剩余作业量计算模块570根据电源的可用剩余电量和电流检测单元检测工作电流计算电源的剩余工作时间和剩余工作数量,并通过电源的显示模块590选择性的显示电源的剩余工作时间和剩余工作数量。
在本发明的另一实施例中,电源包括负载信息获取模块310和显示模块590,负载信息获取模块310检测工具本体作业时的工作电流,并将检测的工作电流传输给剩余作业量计算模块570,剩余电量获取模块320根据电源剩余电量及电源的厂商和历史工况参数计算电源的可用剩余电量,并传输给剩余作业量计算模块570,剩余作业量计算模块570根据电源的可用剩余电量和电流检测单元检测工作电流计算电源的剩余工作时间和剩余工作数量,并通过电源的显示模块590选择性的显示电源的剩余工作时间和剩余工作数量。
在本发明的另一实施例中,电源包括负载信息获取模块310,工具本体包括显示模块590,电源中的负载信息获取模块310检测工具本体作业时的 工作电流,并将检测的工作电流传输给剩余作业量计算模块570,剩余电量获取模块320根据电源剩余电量及电源的厂商和历史工况参数计算电源的可用剩余电量,并传输给剩余作业量计算模块570,剩余作业量计算模块570根据电源的可用剩余电量和电流检测单元检测工作电流计算电源的剩余工作时间和剩余工作数量,并通过工具本体的显示模块590选择性的显示电源的剩余工作时间和剩余工作数量。
在本发明的一实施例中,对于第一电动工具,如花园类电动工具,包括割草机,打草机,吹吸机,链锯等作业时工况相对比较稳定,即该类电动工具作业时工况波动不是很大,可以通过电动工具的实时负载信息代替平均负载值。剩余作业量计算模块570分别连接可用剩余电量获取模块540和负载信息获取模块310,并根据电源的可用剩余电量和实时工作电流计算电源的剩余工作时间。具体的根据实时电流对时间的积分可以得出可用剩余电量Q
剩在该电流下可持续工作的时间,如下式:
优选的,在上述实施例中,剩余作业量计算模块570还可根据电源的可用剩余电量和实时工作电流计算电源的剩余工作数量。具体的,第一电动工具作业时,获取电动工具的实时工作电流作为平均工作电流,通过单位电量除以平均工作电流来获取单位电量的可工作时间,根据单位电量的可工作时间乘以单位时间内的可作业面积得到单位电量的可作业面积。根据上述实施例中获得的电源可用剩余电量乘以单位电量的可工作时间来计算电源的剩余工作时间,另外,根据电源的剩余工作时间乘以单位时间内的可作业面积计算电源所能工作的面积。
在本发明一实施例中,对于第一电动工具,如割草机,打草机,吹吸机和链锯等,电源安装于割草机等第一电动工具为其提供电能时,启动电动工具,当电动工具稳定工作后,获取电动工具的一实时工作电流,因电动工具稳定工作后,其工况相对稳定,因此可将该实时工作电流近似作为上述电动工具的平均工作电流,根据该实时工作电流及电源可用剩余电量计算电源剩余工作间时间,用户根据剩余工作时间可提前准备要替换的电源。
在本发明的另一实施例中,电动工具包括第二电动工具,例如电锤,电 钻,电动扳手,电圆锯,角磨等。对于第二电动工具,因功耗与作业对象的材料或者作业对象的大小有关,因此,可从第二电动工具启动后,记录工具作业时的负载信息,本发明中记录的负载信息为工具本次启动后的信息,相对于历史工况信息,更接近于本次启动后的工具的平均工况,计算结果更准确。
具体的,负载信息获取模块310包括记录单元311,电源安装至第二电动工具后,启动第二电动工具,记录电动工具作业时的工作电流;负载信息获取模块310还包括平均负载值计算单元312,用于根据记录的工作电流计算第二电动工具作业时的平均工作电流;剩余作业量计算模块570分别连接可用剩余电量获取模块540、记录单元311和平均负载值计算单元312,根据电源的可用剩余电量和平均工作电流计算电源的剩余工作时间。
具体的,以电钻为例,预设电源安装至电钻后,启动电钻,记录单元311记录电钻作业时的工作电流及对应的时间,负载信息获取模块310包括平均负载值计算单元312,用于根据记录的工作电流计算电钻启动后的平均工作电流,优选的,将电钻启动后的时间至少分为第一工作时间t
1和第二工作时间t
2,负载信息获取模块310获取第一工作时间t
1内的工作电流和第二工作时间t
2内的工作电流传输给平均负载值计算单元311,平均负载值计算单元311根据t
1内实时电流对时间t
1的积分可得出第一工作时间的耗电量Q
1,根据t
2内实时电流对时间t
2的积分可得出第一工作时间的耗电量Q
2。
并根据第一耗电量Q
1和第二耗电量Q
2计算第一工作时间t
1和第二工作时间t
2内的总耗电量Q,Q=Q
1+Q
2。
可计算平均工作电流I。平均负载值计算单元311将计算的平均工作电流I传输给剩余作业量计算模块570,剩余作业量计算模块570根据电源的可用剩余电量Q
剩等于平均工作电流对剩余工作时间的积分,可计算剩余工作时间。
在本发明中,预设作业包括打孔,打螺钉或拧松螺钉等,剩余作业量计算模块不仅可计算电源的剩余工作时间,还可计算电动工具的电源完成预设作业的数量,即电源的可用剩余电量可钻几个孔或者打几个螺钉。
在本发明的另一实施例中,电动工具包括第二电动工具,负载信息获取模块310包括记录单元311,用于记录第二电动工具完成预设作业的负载信息;负载信息获取模块310还包括平均负载值计算单元312,用于根据记录的负载信息计算第二电动工具作业时的平均负载值;剩余作业量计算模块570分别连接可用剩余电量获取模块540、记录单元311和平均负载值计算单元312,根据电源的可用剩余电量和平均负载值计算电源可完成预设作业的数量。
具体的,以电动扳手为例,负载信息获取模块310中的记录单元311记录电动扳手从开始打螺钉,至螺钉与材料表面齐平时的作业时间及该作业时间内的实时工作电流。为了精确的确定完成一个螺钉的时间及消耗的电量,优选的,可预先设置电流条件,电流达到预设条件时,表示螺钉与材料表面齐平。预设条件可以是电流达到预设值或者电流的一阶导数或高阶导数达到预设条件。平均负载值计算单元312根据实时电流对时间的积分可计算电动扳手打完一个螺钉的总电量,根据作业时间及总电量计算完成一个螺钉的平均工作电流。剩余作业量计算模块570根据电源的可用剩余电量和完成一个作业的平均工作电流可计算电源可用剩余电量可打几个孔、打几个螺钉或者拧松几个螺钉。
上述实施例中的电源可用剩余电量的计算方法,根据电动工具实际作业时,完成一个作业的平均工作电流来计算剩余电源电量可完成作业的时间,其结果更为准确,本实施例中,避免了由于螺钉大小或者板材的材料不同,实际工作电流不同,而导致的计算结果不准确的问题。
对于第二电动工具,因功耗与作业对象的材料或者作业对象的大小有关,因此现有技术中通过识别电动工具的种类来计算电源剩余工作时间或者根据工具的历史工况参数来计算电源可用剩余电量的方法会存在一定的误差。本实施例中,为了精确的计算电源的剩余工作时间,从第二电动工具启动后,记录工具作业时的实时工作电流,根据实时工作电流计算启动后的平均工作电流,计算结构更为准确,且相对于历史工况信息,本实施例中的平均工作电流更接近于电动工具实时工作电流,计算结果更准确。
在本发明的一实施例中,一种电动工具的电源电量管理系统,还包括剩余电量获取模块320和通信模块,其中,剩余电量获取模块320用于获取电源的剩余电量。通信模块,用于获取电源内存储的电源的历史工况参数。本 发明中电源内设通信模块,用于与电动工具的通信模块进行数据传输,传输的数据包括但不限于电源的历史工况参数。可用剩余电量获取模块540,用于根据剩余电量获取模块320获取的电源的剩余电量和电源的历史工况参数计算电源的可用剩余电量。
优选的,在上述实施例中,可计算电源剩余工作时间的电动工具内还包括存储模块560,用于预先存储电源的厂商和历史工况参数与电源容量衰减的对应关系,可用剩余电量获取模块540块用于根据电源的厂商和历史工况参数与容量衰减的对应关系确定电源的容量衰减量,并根据电源的容量衰减计算电源的可用剩余电量。该对应关系可以通过模拟仿真实验测试进行获取。例如,不同的厂商,即使电源充放电次数,电源充电截止电压,放电截止电压及充电倍率等相同,电源的容量衰减也可能不同,因此,本发明中电动工具和电源直接进行数据传输,获取电源的厂商和历史工况参数。
在本发明中,所述电源的历史工况参数包括充放电次数、充电倍率、充电截止电压、充电电流、放电电流、放电截止电压和电源温度中的至少一种参数。
优选的,电源包括记录组件,用以记录电源的放电情况,根据电源的放电情况分析电源的容量衰减。具体的,记录组件记录电源放电时的最大电流及放电时间,根据记录的数据分析电源的容量衰减
本发明通过电源的历史工况参数确定电源的容量衰减,对电源的剩余容量进行修正,使得电源的剩余容量计算的更为精确,用户可比较准确的获知电源的剩余容量。本发明中,用户还可获知电源的剩余工作时间,便于用户及时获知电源可使用时间,提前准备备用电源,以免影响工作效率,浪费时间。本发明为了更精确的计算电源的剩余工作时间,对于不同类别的电动工具,采用不用的计算方法,计算结果更为精确,对于功耗比较稳定的花园类电动工具,检测电动工具启动后的实时工作电流作为电动工具的平均工作电流,计算电源的剩余工作时间。对于功耗变化比较大的第二电动工具,可通过计算电动工具启动后的平均工作电流计算电源的剩余工作时间或者还可根据电动工具完成一个作业的平均工作电流计算电源可用剩余电量可完成预设作业的数量。本发明中,通过对不同功耗类别的电动工具的分别计算使得用户可获知电动工具在不同的工况下电源可用剩余电量可作业的时间及作业的数量。
图11为一实施例中的电动工具的电源电量管理方法的流程图。该电动设备可以包括所有通过自身储能电源进行供电以维持自身工作的设备。例如,该电动设备可以为手机、平板、计算机等数码设备,也可以为电钻、割草机、电锯等电动工具。电动设备内的电源为可充电锂电源。参见图11,该方法包括以下步骤:
步骤S110,确定电源的剩余电量。
在本实施例中,确定电源的剩余电量的步骤包括以下子步骤,如图12所示。
步骤S210,计算电源的充电电量。
锂电充电器一般是CC/CV充电,其恒流源原理框图如图13所示。充电电源的充电电量Q
c等于充电电流I对时间t积分的结果再乘以充电效率η,如下式:
步骤S220,根据电源充电前的电量和该充电电量确定电源的总电量。
电源的总电量Q
t等于电源充电前的电量也即上一次的可用剩余电量Q
r和充电电量Q
c之和,如下式:
步骤S230,计算电源的放电电量。
放电电量和充电电量的计算方式相同,采用放电电流对时间的积分结果作为实时的放电电量Q
d。
步骤S240,根据电源的总电量和该放电电量确定电源的剩余电量。
电源的剩余电量等于电源的总电量Q
t减去实时的放电电量Q
d。
采用这种方式确定的剩余电量具有较高的准确度。
步骤S120,获取电源的历史工况参数。
电源的历史工况参数包括充放电次数、充电倍率、充电截止电压、放电电流、放电截止电压和电源温度中的至少一种参数。其中,充电倍率、充电截止电压、放电电流、放电截止电压和电源温度均为对应于历史充放电过程 中的充放电参数。可以根据实际需要的控制精确度来对各参数进行选择。在一实施例中,可以同时获取上述参数以确定电源的容量衰减量。
步骤S130,根据电源的历史工况参数确定电源的容量衰减量。
根据电源的历史工况参数例如电源的充放电次数和环境温度等确定电源的容量衰减量。在本实施例中,会预先存储电源的历史工况参数与容量衰减量的对应关系。对应关系可以以表格形式进行存储,也可以通过数学模型进行存储。该对应关系可以通过模拟仿真实验测试进行获取。
步骤S140,根据电源的剩余电量和容量衰减量确定电源当前的可用剩余电量。
根据电源的剩余电量和容量衰减量来确定电源当前的可用剩余电量,可以确保实际获得的可用剩余电量为实际用户所能够使用的电量,能够满足用户使用需求且准确度较高。
步骤S150,输出可用剩余电量。
可用剩余电量可以直接输出处理模块进行相关的处理,以进一步获取其他目标参数,例如可持续工作时间等。在一实施例中,可用剩余电量也可以通过显示模块进行输出,从而供用户直观的查看电动设备的可用剩余电量。由于可用剩余电量的精准度较高,从而使得用户能够精确了解电动设备的可用剩余电量情况,以便用户对用电进行提前规划,满足用户的使用需求。
上述电动设备的电量管理方法,在确定出电源的剩余电量后,会根据电源的历史工况参数如电源历史充放电过程中的环境温度、电源充放电次数以及放电电流等来确定电源的容量衰减量,从而根据剩余电量和容量衰减量准确确定实际能够供用户使用的可用剩余电量。也即,上述方法会根据电源的使用时间(对应于充放电次数)和历史使用环境(对应于环境温度)来确定实时的可用剩余电量,从而使得该可用剩余电量的值相对较为准确,能够满足用户的实际使用需求。
在一实施例中,上述方法在前述实施例的基础上还包括步骤S410~S430,如图14所示。
步骤S410,获取电源当前的放电电流。
通过电流传感器等检测设备对电源当前的放电电流进行检测。在一实施例中,电源的放电电流处于变化状态,因此可以统计预设时间间隔内的放电电流的平均值作为该电源的放电电流。预设时间间隔可以设置为1~10s。预设时间间隔过短会导致显示太快,数据频繁跳动眼睛看不清。
步骤S420,根据放电电流和可用剩余电量计算电动设备在当前工况下的可持续工作时间。
根据当前的放电电流以及可用剩余电量即可估算在当前工况下电源的可持续供能时间,也即电动设备的可持续工作时间。由于可用剩余电量的准确度较高,从而可以确保可持续工作时间也较为精准。并且,可持续工作时间会根据放电电流的变化也即负载的变化而做实时更新,实时性较好,能更好的满足用户的使用需求。
步骤S430,显示该可持续工作时间。
根据显示的可持续工作时间,用户可以知晓电源的使用情况,从而对后续工作做提前规划和布局,满足用户的使用需求。在本实施例中,电动设备可以单独显示可持续工作时间,也可以同时对可持续工作时间和可用剩余电量进行显示。
本发明实施例还提供一种电动工具的电源电量管理系统,其结构框图如图15所示。该电量管理系统包括剩余电量确定模块510、历史工况参数获取模块520、容量衰减量确定模块530、可用剩余电量计算模块540和输出模块550。
剩余电量确定模块510用于确定电源的剩余电量。在一实施例中,剩余电量确定模块510包括充电电量计算单元610、总电量确定单元620、放电电量计算单元630和剩余电量确定单元640,如图16所示。其中,充电电量计算单元610用于计算电源的充电电量。电源的充电电量等于充电电流对时间积分的结果再乘以充电效率。总电量确定单元620与充电电量计算单元610连接,用于根据电源充电前的电量和充电电量确定电源的总电量。放电电量计算单元630用于计算电源的放电电量。电源的放电电量等于放电电流对时间的积分。剩余电量确定单元640分别与总电量确定单元620、放电电量计 算单元630连接,用于根据电源的总电量和放电电量确定电源的剩余电量。采用上述结构的剩余电量确定模块510确定的剩余电量具有较高的准确度。
历史工况参数获取模块520用于获取电源的历史工况参数。电源的历史工况参数包括充放电次数、充电倍率、充电截止电压、放电电流、放电截止电压和电源温度中的至少一种参数。故,历史工况参数获取模块520内可以设置相应的历史工况参数采集单元,例如设置充放电次数统计单元以及温度检测单元等。
容量衰减量确定模块530与历史工况参数获取模块520连接。容量衰减量确定模块530用于根据历史工况参数获取模块520获取到的历史工况参数如充放电次数和环境温度确定电源的容量衰减量。在一实施例中,该系统还包括存储模块560。存储模块560用于电源的历史工况参数与容量衰减量的对应关系。因此,容量衰减量确定模块530可以根据该对应关系确定当前工况下的容量衰减量。
可用剩余电量计算模块540分别与剩余电量确定模块510和容量衰减量确定模块530连接,用于根据电源的剩余电量和容量衰减量确定电源当前的可用剩余电量。根据电源的剩余电量和容量衰减值确定电源当前的可用剩余电量,可以确保实际获得的可用剩余电量为实际用户所能够使用的电量,能够满足用户使用需求且准确度较高。
输出模块550与可用剩余电量计算模块540连接,用于输出该可用剩余电量。输出模块550可以为传输装置,用于将可用剩余电量计算模块540计算得到的可用剩余电量输出给其他处理模块进行进一步的处理,以得到相应的目标参数。在一实施例中,输出模块550也可以为显示模块,以对该可用剩余电量进行显示。显示模块可以为LED显示屏、LCD显示屏,也可以为电量指示灯。
上述电动设备的电量管理系统,在确定出电源的剩余电量后,会根据电源的历史工况参数如电源历史充放电过程中的环境温度、电源充放电次数以及放电电流等来确定电源的容量衰减量,从而根据剩余电量和容量衰减量准确确定实际能够供用户使用的可用剩余电量。也即,上述系统会根据电源的 使用时间(对应于充放电次数)、历史使用环境(对应于环境温度)以及负载的大小情况(对应于放电电流)来确定实时的可用剩余电量,从而使得该可用可用剩余电量的值相对较为准确,能够满足用户的实际使用需求。
在另一实施例中,上述电量管理系统还包括可持续工作时间计算模块570、电流检测模块580和显示模块590,如图15所示。可持续工作时间计算模块570分别与可用剩余电量计算模块540、电流检测模块580连接。电流检测模块730用于检测电源当前的放电电流。电流检测模块730可以通过电流传感器等检测设备来实现。可持续工作时间计算模块570用于根据放电电流和可用剩余电量计算所述电动设备在当前工况下的可持续工作时间。由于可用剩余电量的准确度较高,从而可以确保可持续工作时间也较为精准。并且,可持续工作时间会根据放电电流的变化也即负载的变化而做实时更新,实时性较好,能更好的满足用户的使用需求。显示模块590用于显示该可持续工作时间。在本实施例中,显示模块590可以单独显示可持续工作时间,也可以同时对可持续工作时间和可用剩余电量进行显示。
根据显示模块590显示的可持续工作时间,用户可以知晓电源的使用情况,从而对后续工作做提前规划和布局,可以很好满足用户的使用需求。
本发明实施例还提供一种电动设备。该电动设备包括设备本体以及前述任意实施例所述的电量管理系统。通过该电量管理系统,用户可以准确获知电动设备的实际可用剩余电量以及可持续工作时间。例如,电钻可以钻多少孔,割草机可以割多久的草,修多久枝叶等等,从而方便用户进行工作安排。
以上所述实施例的各技术特征可以进行任意的组合,为使描述简洁,未对上述实施例中的各个技术特征所有可能的组合都进行描述,然而,只要这些技术特征的组合不存在矛盾,都应当认为是本说明书记载的范围。
以上所述实施例仅表达了本发明的几种实施方式,其描述较为具体和详细,但并不能因此而理解为对发明专利范围的限制。应当指出的是,对于本领域的普通技术人员来说,在不脱离本发明构思的前提下,还可以做出若干变形和改进,这些都属于本发明的保护范围。因此,本发明专利的保护范围应以所附权利要求为准。
Claims (33)
- 一种电动工具的电源电量管理方法,所述电动工具包括电源,向所述电动工具提供电能,其特征在于,还包括:获取电源的可用剩余电量;获取电动工具作业时的负载信息;根据所述电源的可用剩余电量和所述负载信息计算所述电源的剩余作业量。
- 根据权利要求1所述的方法,其特征在于,所述剩余作业量包括剩余工作时间和剩余工作数量。
- 根据权利要求2所述的方法,其特征在于,所述方法还包括:根据所述电动工具的类型选择性的显示电源的剩余工作时间和剩余工作数量中的至少一种。
- 根据权利要求2所述的方法,其特征在于,所述电动工具包括负载随时间变化不明显的第一电动工具和负载随时间变化明显的第二电动工具中的至少一种。
- 根据权利要求4所述的方法,其特征在于,所述获取所述电动工具作业时的负载信息;根据所述电源的可用剩余电量和所述负载信息计算所述电源的剩余作业量的步骤包括:获取所述第一电动工具作业时的实时负载信息;根据所述电源的可用剩余电量和实时负载信息计算所述电源的剩余作业量。
- 根据权利要求5所述的方法,其特征在于,所述第一电动工具为除草工具,所述剩余工作数量为电源的可用剩余电量可维持第一电动工具除草的面积。
- 根据权利要求4所述的方法,其特征在于,所述获取所述电动工具作业时的负载信息;根据所述电源的可用剩余电量和所述负载信息计算所述电源的剩余作业量的步骤包括:所述第二电动工具启动后,记录所述第二电动工具作业时的负载信息;根据记录的所述负载信息计算所述第二电动工具作业时的平均负载值;根据所述电源的可用剩余电量和所述平均负载值计算所述电源的剩余工作时间。
- 根据权利要求7所述的方法,其特征在于,所述根据记录的所述负载信息计算所述第二类电动工具作业时的平均负载值的步骤包括:获取记录的所述第二电动工具在第一工作时间内的实时负载信息,采用积分法计算在第一工作时间内的第一耗电量;获取记录的所述第二类电动工具在第二工作时间内的实时负载信息,采用积分法计算在第二工作时间内的第二耗电量;根据所述第一耗电量和第二耗电量计算所述第一工作时间和第二工作时间内的总耗电量;获取所述第一工作时间和第二工作时间的总时间,根据所述总时间和总耗电量计算所述第二电动工具作业时的平均负载值。
- 根据权利要求7所述的方法,其特征在于,所述根据记录的所述负载信息计算所述第二电动工具作业时的平均负载值的步骤包括:获取记录的所述第二电动工具在第一工况下的实时负载信息,采用积分法计算所述第二电动工具在第一工况下的第一耗电量;获取记录的所述第二电动工具在第二工况下的实时负载信息,采用积分法计算所述第二电动工具在第二工况下的第二耗电量;根据所述第一耗电量和第二耗电量计算第一工况和第二工况下的总耗电量;获取所述第一工况和第二工况的总时间,根据所述总时间和总耗电量计算第一工况和第二工况下的平均负载值。
- 根据权利要求4所述的方法,其特征在于,所述获取所述电动工具作业时的负载信息;根据所述电源的可用剩余电量和所述负载信息计算所述电源的剩余作业量的步骤包括:记录所述第二电动工具完成预设作业的负载信息;根据记录的所述负载信息计算所述第二电动工具完成预设作业时的平均负载值;根据所述电源的可用剩余电量和所述平均负载值计算所述电源的剩余工作数量。
- 根据权利要求10所述的方法,其特征在于,所述记录所述第二电动工具完成预设作业的负载信息,根据记录的所述负载信息计算所述第二电动工具完成预设作业时的平均负载值的步骤包括:记录所述第二类电动工具从开始预设作业至负载信息满足预设条件时的时间和负载信息;根据所述时间和负载信息利用积分法计算完成预设作业的总电量;根据所述时间和总电量计算完成预设作业时的平均负载值。
- 根据权利要求10所述方法,其特征在于,所述预设作业包括钻孔,打螺钉或拧松螺钉中的至少一种,所述剩余工作数量包括所述电源的可用剩余电 量可维持第二电动工具钻孔的个数、打螺钉的个数或者拧松螺钉的个数中的至少一种。
- 根据权利要求1所述方法,其特征在于,所述获取所述电源的可用剩余电量的步骤包括:获取所述电源的剩余电量;获取所述电源的厂商和历史工况参数;根据所述电源的厂商和历史工况参数计算所述电源的容量衰减量;根据所述电源的剩余电量和所述电源的容量衰减量计算所述电源的可用剩余电量。
- 根据权利要求13所述的方法,其特征在于,所述获取所述电源的可用剩余电量的步骤还包括:记录所述电源的放电电流,根据记录的所述放电电流计算所述电源的容量衰减量。
- 根据权利要求13所述的方法,其特征在于,所述电源的历史工况参数包括充放电次数、充电倍率、充电截止电压、充电电流、放电截止电压和电源温度中的至少一种参数。
- 根据权利要求3所述的方法,其特征在于,还包括:读取所述电动工具的识别模块提供的识别信息以识别所述电动工具的类型,根据所述电动工具的类型选择性的显示电源的剩余工作时间和剩余工作数量中的至少一种。
- 根据权利要求16所述的方法,其特征在于,还包括:通过所述电源的识别模块与外部设备通信,更新所述识别模块内的识别信息。
- 根据权利要求13所述的方法,其特征在于,还包括步骤:预先存储所述电源的历史工况参数与容量衰减量的对应关系;根据所述电源的历史工况参数与容量衰减的对应关系确定所述电源的容量衰减量;根据所述电源的容量衰减计算所述电源的可用剩余电量。
- 根据权利要求13所述的方法,其特征在于,所述获取所述电源的剩余电量的步骤包括:计算电源的充电电量;所述电源的充电电量等于充电电流对时间积分的结果再乘以充电效率;根据电源充电前的电量和所述充电电量确定电源的总电量;计算电源的放电电量;所述电源的放电电量等于放电电流对时间的积分;根据所述电源的总电量和所述放电电量确定所述电源的剩余电量。
- 根据权利要求1所述的方法,其特征在于,所述电源包括电池包和背包电池包。
- 一种电动工具的电源电量管理系统,所述电动工具包括电源,所述电源向所述电动工具提供电能,其特征在于,所述系统还包括:可用剩余电量获取模块,用于获取电源的可用剩余电量;负载信息获取模块,用于获取所述电动工具作业时的负载信息;剩余作业量计算模块,分别连接所述电源可用剩余电量获取模块和所述负载信息获取模块,用于根据所述电源的剩余电量和负载信息计算所述电源的剩余作业量。
- 根据权利要求21所述的系统,其特征在于,所述剩余作业量包括剩余工作时间和剩余工作数量。
- 根据权利要求22所述的系统,其特征在于,还包括显示模块,用于根据所述电动工具的类型选择性的显示电源的剩余工作时间和剩余工作数量中的至少一种。
- 根据权利要求22所述的系统,其特征在于,所述电动工具包括负载随时间变化不明显的第一电动工具和负载随时间变化明显的第二电动工具中的至少一种。
- 根据权利要求24所述的系统,其特征在于,所述负载信息获取模块用于获取所述第一电动工具作业时的实时负载信息;所述剩余作业量计算模块分别连接所述电源可用剩余电量获取模块和所述负载信息获取模块,并根据所述电源的剩余电量和实时负载信息计算所述电源的剩余作业量。
- 根据权利要求25所述的系统,其特征在于,所述第一电动工具为除草工具,所述剩余工作数量为电源的可用剩余电量可维持第一电动工具除草的面积。
- 根据权利要求24所述的系统,其特征在于,所述负载信息获取模块包括记录单元,用于第二电动工具启动后,记录所述第二电动工具作业时的负载信息;所述负载信息获取模块还包括平均负载值计算单元,用于根据记录的所述负载信息计算所述第二电动工具作业时的平均负载值;所述剩余作业量计算模块分别连接所述电源可用剩余电量获取模块、所述记录单元和所述平均负载值计算单元,根据所述电源的剩余电量和所述平均负载值计算所述电源的剩余工作时间。
- 根据权利要求27所述的系统,其特征在于,所述负载信息获取模块包括记录单元,用于记录所述第二电动工具完成预设作业的负载信息;所述负载信息获取模块还包括平均负载值计算单元,用于根据记录的所述负载信息计算所述第二电动工具作业时的平均负载值;所述剩余作业量计算模块分别连接所述电源可用剩余电量获取模块、所述记录单元和所述平均负载值计算单元,根据所述电源的剩余电量和所述平均负载值计算所述电源的剩余工作数量。
- 根据权利要求28所述的系统,其特征在于,所述预设作业包括钻孔,打螺钉或拧松螺钉中的至少一种,所述剩余工作数量包括所述电源的可用剩余电量可维持第二电动工具钻孔的个数、打螺钉的个数或者拧松螺钉的个数中的至少一种。
- 根据权利要求21所述的系统,其特征在于,还包括:剩余电量获取模块,用于获取所述电源的剩余电量;通信模块,用于获取所述电源内存储的电源的厂商和历史工况参数;所述电源可用剩余电量获取模块,用于根据所述电源的剩余电量和所述电源的历史工况参数计算所述电源的可用剩余电量。
- 根据权利要求21所述的系统,其特征在于,还包括存储模块,用于预先存储所述电源的厂商和历史工况参数与容量衰减量的对应关系;所述可用剩余电量获取模块用于根据所述电源的厂商和历史工况参数与容量衰减的对应关系确定所述电源的容量衰减量,并根据所述电源的容量衰减计算所述电源的可用剩余电量。
- 根据权利要求26所述的系统,其特征在于,还包括识别模块,用于识别所述电动工具的类型。
- 根据权利要求21所述的系统,其特征在于,所述电源包括电池包和背包电池包。
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