CN110391681B - Electrical apparatus - Google Patents
Electrical apparatus Download PDFInfo
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- CN110391681B CN110391681B CN201910303631.3A CN201910303631A CN110391681B CN 110391681 B CN110391681 B CN 110391681B CN 201910303631 A CN201910303631 A CN 201910303631A CN 110391681 B CN110391681 B CN 110391681B
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- 238000001514 detection method Methods 0.000 claims description 29
- 230000008859 change Effects 0.000 abstract description 36
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- 238000000034 method Methods 0.000 description 8
- 230000008569 process Effects 0.000 description 7
- 230000005611 electricity Effects 0.000 description 5
- 230000007246 mechanism Effects 0.000 description 5
- 241001417527 Pempheridae Species 0.000 description 4
- 238000004140 cleaning Methods 0.000 description 4
- 230000007423 decrease Effects 0.000 description 3
- 238000007599 discharging Methods 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
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- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L5/00—Structural features of suction cleaners
- A47L5/12—Structural features of suction cleaners with power-driven air-pumps or air-compressors, e.g. driven by motor vehicle engine vacuum
- A47L5/22—Structural features of suction cleaners with power-driven air-pumps or air-compressors, e.g. driven by motor vehicle engine vacuum with rotary fans
- A47L5/28—Suction cleaners with handles and nozzles fixed on the casings, e.g. wheeled suction cleaners with steering handle
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
- A47L9/10—Filters; Dust separators; Dust removal; Automatic exchange of filters
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
- A47L9/28—Installation of the electric equipment, e.g. adaptation or attachment to the suction cleaner; Controlling suction cleaners by electric means
- A47L9/2805—Parameters or conditions being sensed
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
- A47L9/28—Installation of the electric equipment, e.g. adaptation or attachment to the suction cleaner; Controlling suction cleaners by electric means
- A47L9/2868—Arrangements for power supply of vacuum cleaners or the accessories thereof
- A47L9/2884—Details of arrangements of batteries or their installation
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
- H01M10/4257—Smart batteries, e.g. electronic circuits inside the housing of the cells or batteries
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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
- H01M10/44—Methods for charging or discharging
- H01M10/443—Methods for charging or discharging in response to temperature
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
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- H02J7/0077—
-
- H02J7/0091—
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
- H01M2010/4271—Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/00306—Overdischarge protection
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Secondary Cells (AREA)
- Electric Vacuum Cleaner (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
An electrical device: provided is an electric cleaner (11) which can prevent deep discharge of a secondary battery (25) at the start of discharge and can restart the use in a shorter time than before. When an instruction from the outside is input from a setting button (26) when the voltage of the secondary battery (25) is greater than a predetermined voltage, a control unit (24) controls the electric blower (23) to start operating. The control unit (24) sets a predetermined voltage on the basis of the amount of change in the voltage of the secondary battery (25) at least at the start of operation and at the end of operation of the electric blower (23).
Description
The present application claims priority based on Japanese patent application 2018-81398 (application date: 2018/04/20), the entire contents of which are incorporated herein by reference.
Technical Field
Embodiments of the present invention relate to an electrical device including an electric unit that operates by power supply from a secondary battery.
Background
Conventionally, in an electric device in which an electric unit is operated by discharging from a secondary battery, the electric unit is usually stopped when the secondary battery is discharged to a predetermined voltage even if the electric unit has a voltage capable of operating. By doing so, the state in which the secondary battery is overdischarged (hereinafter referred to as "deep discharge") is avoided, and it is possible to secure safety or suppress deterioration of the secondary battery. Development of such a technique for safety control of secondary batteries has been advanced while achieving a compromise with the convenience of the electrical equipment.
Disclosure of Invention
The purpose of the present invention is to improve the conventional technology with respect to both safety control and convenience of a secondary battery in an electrical device.
An electric device according to the present invention includes an electric unit, a voltage detection unit, an input unit, an operation start control unit, and a voltage setting unit. The electric unit is operated by power supply from the secondary battery. The voltage detection mechanism detects the voltage of the secondary battery. The input unit starts operation of the electric unit and inputs an instruction from the outside. When the voltage of the secondary battery is greater than a predetermined voltage, the operation start control unit controls the electric unit to start operation if an instruction from the outside is input by the input unit. The voltage setting unit sets a predetermined voltage based on the amount of change in the voltage of the secondary battery at least at the start of operation and at the end of operation of the electric unit.
According to the above configuration, it is possible to avoid deep discharge of the secondary battery at the start of discharge and to restart the use in a shorter time than before.
Drawings
Fig. 1 is a perspective view showing an electrical device according to embodiment 1.
Fig. 2 is a circuit block diagram showing the same electric apparatus.
Fig. 3 is a graph showing an example of the relationship between the voltage and time of the secondary battery of the same electrical device.
Fig. 4 is a flowchart showing control of the same electrical device.
Fig. 5 is a flowchart showing control of the electrical equipment according to embodiment 2.
Detailed Description
The structure of embodiment 1 will be described below with reference to the drawings.
In fig. 1, 11 denotes an electric sweeper as an electric device. In the present embodiment, the electric cleaner 11 is a so-called stick-type cordless electric cleaner including a cleaner body 15 as an electric device body and a long-sized air passage body 16 connected to the cleaner body 15.
The electric cleaner 11 further includes a dust collection unit 22. The electric cleaner 11 further includes an electric blower 23 as an electric unit. The electric cleaner 11 further includes a control unit 24 as a control means. Further, the electric cleaner 11 includes a secondary battery 25 as a power supply unit. The electric cleaner 11 further includes a setting button 26 as an input unit, which is a setting unit for inputting an instruction from the outside regarding the operation start of the electric blower 23 and the like. Further, the electric cleaner 11 includes a terminal, not shown, for charging the secondary battery 25. As shown in fig. 2, the electric cleaner 11 includes a voltage detection unit 28 as a voltage detection means. Further, the electric cleaner 11 includes a temperature detecting unit 29 as a temperature detecting means.
The dust collection unit 22 shown in fig. 1 separates and collects dust from dust-containing air. The dust collection unit 22 is provided in the cleaner body 15, for example. For example, the dust collecting part 22 may be a dust collecting device such as a dust cup, a filter, a paper bag, or the like.
The electric blower 23 generates negative pressure by rotating a fan by a motor, and sucks dust-containing air into the dust collection unit 22. The electric blower 23 is housed in the cleaner body 15.
The control unit 24 is a control board including a microcomputer, for example. The control unit 24 sets the electric blower 23 to an operation state set by the setting button 26, for example, a strong mode, a weak mode, a stop, and the like. That is, the control unit 24 controls the amount of electricity supplied from the secondary battery 25 to the electric blower 23. In the present embodiment, for example, as shown in fig. 2, the control unit 24 controls the amount of electricity supplied from the secondary battery 25 to the electric blower 23 by switching on/off the element 31 such as a switching element that switches on/off the electricity supplied from the secondary battery 25 to the electric blower 23. The control unit 24 adjusts the output of the electric blower 23 to correspond to each operation state by changing the magnitude of the current supplied to the electric blower 23. The control unit 24 controls the constant current of the electric blower 23 so as to achieve a predetermined operation current in each operation mode of the electric blower 23. That is, the control unit 24 sets, for example, an operation current corresponding to each operation mode. For example, 14A in the case of the strong mode and 3A in the case of the weak mode. These operating currents can also be changed in accordance with the state of charge of the secondary battery 25.
Further, the control unit 24 is supplied with power from a predetermined power source 32 such as 5V generated by the secondary battery 25. That is, the control unit 24 uses the secondary battery 25 as a power source. The control unit 24 is housed in the cleaner body 15.
The secondary battery 25 is, for example, a battery pack having a plurality of battery cells. As the secondary battery 25, for example, a lithium ion battery, a nickel hydrogen battery, or the like is used. The secondary battery 25 is housed in the cleaner body 15. Further, the secondary battery 25 is disposed at a position cooled by the exhaust gas of the electric blower 23.
The setting button 26 is configured to set an operation mode or the like of the electric blower 23 by a user operation. In the present embodiment, for example, the setting button 26 is disposed on a handle 33 as a grip portion as shown in fig. 1. The handle 33 is provided on the cleaner body 15, for example.
The terminal is electrically connected to a charging mechanism, not shown, for charging the secondary battery 25. As the charging mechanism, for example, a charging device having a function as a storage table, an AC adapter not having a function as a storage table, or the like can be used. That is, the charging circuit may be provided on the charging mechanism side, or the charging circuit may be provided in advance in the electric cleaner 11, and the secondary battery 25 may be charged via the charging circuit by the power supply from the charging mechanism.
The voltage detection unit 28 shown in fig. 2 is a structure for detecting the voltage of the secondary battery 25. The voltage detection unit 28 may directly detect the voltage value of the secondary battery 25, or may indirectly detect other indicators corresponding to the voltage value, or the like. The voltage detection unit 28 is accommodated in the cleaner body 15, for example.
The temperature detection unit 29 is configured to detect the temperature of the secondary battery 25. The temperature detecting unit 29 directly or indirectly detects the temperature of the secondary battery 25. The temperature detecting unit 29 is accommodated in the cleaner body 15, for example.
The voltage detection unit 28 and the temperature detection unit 29 may be incorporated in the secondary battery 25 or may be provided separately from the secondary battery 25.
The air duct body 16 shown in fig. 1 is configured to communicate with the suction side of the electric blower 23 in a state of being connected to the cleaner body 15 by dividing the air duct inside. The air duct body 16 includes an elongated extension tube 35. The air duct 16 may be provided with the suction port body 36 on the upstream side of the front end side. Any structure may be used as the suction port body 36, but in this embodiment, for example, a floor brush is used. The air passage body 16 is formed substantially linearly as a whole.
Further, by removing the air duct body 16 and using only the cleaner body 15, the electric cleaner 11 can be used as a hand-held or portable electric cleaner.
Next, the operation of embodiment 1 will be described.
In a state where the secondary battery 25 is sufficiently charged and can be used normally, the electric cleaner 11 controls the amount of electricity supplied from the secondary battery 25 to the electric blower 23 by controlling the on/off of the element 31 by the control unit 24 in accordance with the operation of the setting button 26, and the electric blower 23 operates. The electric cleaner 11 sucks dust on the floor together with air by a negative pressure generated by the operation of the electric blower 23. The user grips the handle 33 and moves the suction port body 36 forward and backward on the floor surface, thereby sucking dust into the dust collection unit 22 through the suction port body 36. In the dust collection unit 22, dust is separated from the sucked dust-containing air and collected. The air from which dust is separated is sucked by the electric blower 23, and the electric blower 23 is cooled and then exhausted from the cleaner body 15. When the cleaning is completed, the control unit 24 instructs the stop by the user by the setting button 26, and reduces the amount of electricity supplied from the secondary battery 25 to the electric fan 23, thereby stopping the electric fan 23.
In the present embodiment, the control unit 24 monitors the voltage and temperature of the secondary battery 25 via the voltage detection unit 28 and the temperature detection unit 29. That is, the control unit 24 monitors the voltage V of the secondary battery 25, the temperature T of the secondary battery 25, and the like based on the information output from the voltage detection unit 28 and the temperature detection unit 29.
As shown by the solid line in fig. 3, the control unit 24 forcibly stops the operation of the electric blower 23 when the voltage V of the secondary battery 25 gradually decreases to the 1 st voltage V1 or less due to the operation of the electric blower 23. The control unit 24 is an operation start control unit: when the voltage V of the secondary battery 25 at the start of operation is greater than the 2 nd voltage V2, which is a predetermined voltage, if an instruction is input from the outside about the start of operation by the setting button 26, control is performed so that the electric blower 23 starts to operate. That is, the control unit 24 of the present embodiment restricts the start of the operation of the electric blower 23 when the voltage V of the secondary battery 25 is equal to or lower than the 2 nd voltage V2. For example, as shown by an example in the two-dot chain line of fig. 3, when the secondary battery 25 is charged, the control unit 24 does not start the operation of the electric blower 23 until time t1 in fig. 3. By doing so, the electric cleaner 11 is prevented from being repeatedly restarted in a state where the voltage V of the secondary battery 25 is low, and the secondary battery 25 is prevented from being in a deep discharge state, which is a state where the secondary battery 25 is overdischarged, and the life of the secondary battery 25 is prevented from being reduced.
The 1 st voltage V1 is a voltage higher than the discharge end voltage of the secondary battery 25. The 1 st voltage V1 may be, for example, a low voltage close to the discharge end voltage. The 2 nd voltage V2 is higher than the 1 st voltage V1 and lower than the voltage in the fully charged state of the secondary battery 25.
In the present embodiment, the control unit 24 is a voltage setting unit that sets the 2 nd voltage V2 described above based on the change amount Δ, which is the difference in voltage of the secondary battery 25 at the end of the operation of the electric blower 23. That is, as compared with the state in which the secondary battery 25 is flowing current to the electric blower 23, in the state in which no current is flowing to the electric blower 23, as in the example shown in fig. 3, the voltage is high due to the internal resistance, and the control unit 24 assumes the internal resistance of the secondary battery 25 based on the difference between these voltages, and sets the 2 nd voltage V2 based on the internal resistance.
Specifically, when the operation stop of the electric cleaner 11, that is, the stop of the electric blower 23 is instructed by the setting button 26, or when the electric blower 23 is forcibly stopped by the voltage V of the secondary battery 25 being equal to or lower than the 1 st voltage V1, that is, when the operation of the electric blower 23 is stopped, the control unit 24 holds the voltage V of the secondary battery 25 detected by the voltage detecting unit 28 at the voltage Va. The voltage Va is a voltage in a state where a current flows to the electric blower 23. Further, after a predetermined time, for example, several seconds from the stop, the control unit 24 reads the voltage V of the secondary battery 25 detected by the voltage detection unit 28. The read voltage Vp is a voltage in a state where no current flows to the electric blower 23. Next, the control unit 24 calculates a difference (Vp-Va) between the voltage Va and the voltage Vp, and sets the calculated value as the change amount Δ. The control unit 24 sets the 2 nd voltage V2 based on the change amount Δ.
Further, regarding the setting of the 2 nd voltage V2, the temperature T of the secondary battery 25 at the end of the operation of the electric blower 23 detected by the temperature detecting unit 29 may be further considered. The control unit 24 may reduce the operating current of the electric blower 23 according to the change amount Δ. These controls are described later.
Next, the above-described operation will be described in detail with reference to the flowchart shown in fig. 4.
In step S1, the control unit 24 obtains the voltage V and the temperature T of the secondary battery 25 via the voltage detection unit 28 and the temperature detection unit 29, and obtains the output from the setting button 26.
Next, in step S2, the control unit 24 determines whether or not an operation request is output from the setting button 26. In step S2, if it is determined that the operation request has not been output, the process returns to step S1. On the other hand, when the control unit 24 determines that the operation request is output in step S2, the control unit 24 determines whether or not the voltage V of the secondary battery 25 is greater than the 2 nd voltage V2 in step S3. In step S3, when the control unit 24 determines that the voltage V is not greater than the 2 nd voltage V2, the process returns to step S1. On the other hand, in step S3, when the control unit 24 determines that the voltage V is greater than the 2 nd voltage V2, the control unit 24 sets the operation current of the electric blower 23 in step S4.
In step S4, the control unit 24 sets the operation current of the electric blower 23. The operation current is set to a current corresponding to the operation mode, but the current may be reduced according to the change amount Δ measured at the previous use, depending on the discharge capacity or the remaining amount of the secondary battery 25, which is the voltage V. That is, if the operation current of the electric blower 23 is large when the variation amount Δ is large, a large voltage drop occurs. Accordingly, by reducing the operating current of the electric blower 23 according to the change amount Δ, it is possible to suppress a voltage drop and suppress or prevent deep discharge, for example, when the electric blower 23 is operated in a state where the voltage V of the secondary battery 25 is close to the 2 nd voltage V2. The discharge capacity of the secondary battery 25 may be predicted based on, for example, data or a table stored in advance indicating the correspondence between the voltage V of the secondary battery 25 and the discharge capacity. In this case, for example, the operation current may be set to be variable according to the voltage V and the change amount Δ of the secondary battery 25 before the start of the operation of the electric blower 23, or may be switched to a preset operation current. In this case, for example, when there are a plurality of operation modes in which the operation currents of the electric blower 23 are different, at least the operation current in the operation mode in which the operation current is relatively large may be reduced, or only the operation in the operation mode in which the current is relatively small may be permitted, and the operation in the operation mode in which the current is relatively large may be restricted. Further, the operation current may be reduced regardless of the operation mode. In addition, when the operating current of the electric blower 23 is reduced in this way, for example, when the secondary battery 25 becomes a predetermined 3 rd voltage greater than the 2 nd voltage V2, such as when the secondary battery 25 is fully charged, control for canceling the reduction of the operating current of the electric blower 23 may be performed.
In step S5, the control unit 24 switches the on/off state of the element 31 to the operation current set in step S4, and operates the electric blower 23.
Next, in step S6, the control unit 24 obtains the voltage V and the temperature T of the secondary battery 25 via the voltage detection unit 28 and the temperature detection unit 29, and obtains an operation request from the setting button 26.
Further, in step S7, the control unit 24 determines whether or not a request for switching the operation mode is output from the setting button 26. In step S7, when the control unit 24 determines that the operation mode switching request is output, the process returns to step S4. On the other hand, when the control unit 24 determines in step S7 that the operation mode switching request is not output, the control unit 24 determines in step S8 whether or not the stop request is output from the setting button 26.
In step S8, when the control unit 24 determines that the stop request is output, in step S9, the control unit 24 holds the voltage V of the secondary battery 25 at the voltage Va, stops the electric blower 23, and proceeds to step S11, which will be described later. On the other hand, when the control unit 24 determines in step S8 that the stop request is not output, the control unit 24 determines in step S10 whether or not the voltage V of the secondary battery 25 is less than the 1 st voltage V1. In step S10, when the control unit 24 determines that the voltage V is not less than the 1 st voltage V1, the process returns to step S6. On the other hand, in step S10, when the control unit 24 determines that the voltage V is less than the 1 st voltage V1, the process proceeds to step S9.
Next, in step S11, the control unit 24 determines whether or not a predetermined time has elapsed since the stop of the electric blower 23. In step S11, when the control unit 24 determines that the predetermined time has not elapsed, step S11 is repeated. On the other hand, when the control unit 24 determines that the predetermined time has elapsed in step S11, the control unit 24 acquires the voltage V (voltage Vp) and the temperature T of the secondary battery 25 via the voltage detection unit 28 and the temperature detection unit 29 in step S12.
In step S13, the control unit 24 sets the 2 nd voltage V2 based on the change amount Δ that is the difference (Vp-Va) between the voltage Va and the voltage Vp. Thus, in the present embodiment, the control unit 24 calculates the change amount Δ every time the operation of the electric cleaner 11, that is, the operation of the electric blower 23 is stopped. After step S13, the process returns to step S1.
In this step S13, the 2 nd voltage V2 is set relatively large when the control unit 24 determines that the change amount Δ is relatively large, and is set relatively small when the change amount Δ is relatively small, for example. In step S13, instead of the change amount Δ, the determination may be made based on the internal resistance of the secondary battery 25 calculated based on, for example, the ohm rule or calculated using a table or the like corresponding to the change amount Δ stored in advance. In this case, a current flowing through the electric blower 23 is required. This current is a current in an operation state of the electric blower 23 before the stop. That is, when the electric blower 23 has a plurality of operation modes, the current flowing to the electric blower 23 is different depending on the operation modes, and when the electric blower 23 is in an automatic mode in which the current is variable depending on the amount of dust or the like on the floor, the current flowing to the electric blower 23 is different depending on the detection timing, so that the control unit 24 sets the 2 nd voltage V2 based on the difference between the voltage Va and the voltage Vp of the secondary battery 25, that is, the change amount Δ and the current of the electric blower 23 when the change amount Δ is detected. Therefore, in the present embodiment, the current of the electric blower 23 before the operation is stopped may be taken into consideration in setting the 2 nd voltage V2.
The 2 nd voltage V2 may be set in proportion to the variation amount Δ, for example. The 2 nd voltage V2 may be set to be a voltage obtained by adding or subtracting a voltage proportional to the change amount Δ to or from a predetermined reference voltage, for example. Further, the 2 nd voltage V2 may weight the reference voltage by the change amount Δ. The 2 nd voltage V2 may be selected from a plurality of voltages set in advance according to the magnitude of the change amount Δ. In this case, for example, the 2 nd voltage V2 may be fixed when the variation Δ is equal to or smaller than a predetermined value or equal to or larger than a predetermined value, and the 2 nd voltage V2 may be variable only when the variation Δ is larger than the predetermined value or smaller than the predetermined value.
Further, the discharge capacity or the remaining amount of the secondary battery 25 may be predicted based on the data stored in advance indicating the correspondence between the voltage V of the secondary battery 25 and the discharge capacity, and the 2 nd voltage V2 may be corrected based on the prediction.
Further, regarding the setting of the 2 nd voltage V2, the temperature T of the secondary battery 25 at the end of the operation of the electric blower 23 detected by the temperature detecting unit 29 may be further considered. That is, when the ambient temperature is high or when the temperature T of the secondary battery 25 is high, such as immediately after the operation of the electric blower 23 is stopped, the internal resistance is relatively small, and when the ambient temperature is low or when the temperature T of the secondary battery 25 is low, such as when the time has elapsed since the operation of the electric blower 23 is stopped, the internal resistance is relatively large, so that, for example, the difference in the voltage V, that is, the change amount Δ or the internal resistance, or the 2 nd voltage V2 may be corrected based on the temperature. Specifically, since the internal resistance of the secondary battery 25 decreases as the temperature T increases, when the temperature T increases relatively, the difference in the voltage V or the internal resistance increases relatively, that is, the 2 nd voltage V2 increases. The correction may be set to be proportional to the temperature, weighted according to the temperature, or selected from a plurality of preset values according to the height of the temperature, or the 2 nd voltage V2 may be corrected when the temperature T is equal to or lower than a predetermined value or equal to or higher than a predetermined value, or the 2 nd voltage V2 may be corrected only when the temperature T is greater than the predetermined value or lower than the predetermined value.
As described above, in embodiment 1, the 2 nd voltage V2 is set based on the amount of change Δ of the voltage V of the secondary battery 25 at the end of the operation of the electric blower 23. At the end of the operation of the electric blower 23, the temperature T of the secondary battery 25 discharged to supply power to the electric blower 23 has also risen up to that point, and therefore the internal resistance of the secondary battery 25 has relatively decreased, and the amount of change Δ that is the difference in voltage V has also relatively decreased. Accordingly, when the 2 nd voltage V2 is set based on the change amount Δ, the 2 nd voltage V2 is also set to be relatively low, so that the operation restriction of the electric blower 23 can be released at a relatively low voltage. Therefore, the restart of the use can be performed in a shorter time than before while avoiding the deep discharge at the time of discharging the secondary battery 25, and it is possible to meet the needs of the user who wants to restart the cleaning as early as possible because of the residual cleaning, for example, when the voltage V of the secondary battery 25 is lowered and the electric blower 23 is stopped during the cleaning.
Next, embodiment 2 will be described with reference to fig. 5. The same components and actions as those of embodiment 1 are denoted by the same reference numerals, and the description thereof will be omitted.
The timing of measuring the voltage Va and the voltage Vp in embodiment 1 is when the operation of the electric blower 23 is started.
That is, the control unit 24 sets the 2 nd voltage V2 based on the amount of change in the voltage of the secondary battery 25 at the start of the operation of the electric blower 23.
Specifically, when the start of operation of the electric cleaner 11, that is, the start of operation of the electric blower 23 is instructed by the setting button 26, that is, when the operation of the electric blower 23 is started, the control unit 24 holds the voltage V of the secondary battery 25 detected by the voltage detection unit 28 at the voltage Vp. The voltage Vp is a voltage in a state where no current flows to the electric blower 23. After a predetermined time from the start of the operation, the control unit 24 reads the voltage V of the secondary battery 25 detected by the voltage detection unit 28. The read voltage Va is a voltage in a state where a current flows to the electric blower 23. Therefore, when setting the 2 nd voltage V2, the control unit 24 calculates the difference (Vp-Va) between these voltages Va and Vp, and uses the calculated value as the change amount Δ, and sets the 2 nd voltage V2 based on the change amount Δ assuming the internal resistance of the secondary battery 25.
In this case, as in embodiment 1, the internal resistance may be calculated based on, for example, the ohm rule, or may be estimated by referring to a stored table of the internal resistance and the discharge capacity corresponding to the change amount Δ. In the case of calculating the internal resistance based on the ohm rule, a current flowing into the electric blower 23 is required. This current is a current in an operation state immediately after the start of operation of the electric blower 23. Therefore, in the present embodiment, the current of the electric blower 23 immediately after the start of operation may be taken into consideration in setting the 2 nd voltage V2.
Next, these operations will be described with reference to the flowchart shown in fig. 5.
In the present embodiment, the control unit 24 includes the following control in steps S20 to S22 instead of the control in steps S9, S11, and S12.
After step S3, in step S20, the control unit 24 holds the voltage V detected by the voltage detection unit 28 at the voltage Vp, and the process proceeds to step S4.
After step S5, in step S21, the control unit 24 obtains the voltage V (voltage Va) and the temperature T of the secondary battery 25 via the voltage detection unit 28 and the temperature detection unit 29, and holds the voltages V and the temperatures T.
Further, in step S22, instead of step S9, the control unit 24 stops the electric blower 23 and proceeds to step S13.
Next, in step S13, the control unit 24 uses the voltage Vp acquired in step S20 and the voltage Va acquired in step S21 to set the 2 nd voltage V2 in the same manner as in the above-described embodiment 1.
In this way, in embodiment 2 described above, the 2 nd voltage V2 is set based on the amount of change Δ of the voltage V of the secondary battery 25 at the start of operation of the electric blower 23. When the operation of the electric blower 23 is started, the secondary battery 25 is normally in a so-called "cold-down" state in which the temperature is substantially equal to the ambient temperature, and therefore the internal resistance of the secondary battery 25 is relatively large, and the variation delta, which is the difference in voltage V, is also relatively large. Accordingly, when the 2 nd voltage V2 is set based on the difference between the voltages V, the 2 nd voltage V2 is also set relatively high, and therefore the operation restriction of the electric blower 23 can be released at a relatively high voltage. Therefore, for example, when the voltage V of the secondary battery 25 exceeds the 2 nd voltage V2 by charging and the operation restriction of the electric blower 23 is released to operate the electric blower 23, even if a large voltage drop occurs due to a high internal resistance of the secondary battery 25, the secondary battery 25 is less likely to be in a deep discharge state, and a restart of use in a shorter time than before can be achieved.
The above embodiment 1 and embodiment 2 may be combined. That is, the amount of change Δ in the voltage V of the secondary battery 25 at the time of both the start of operation and the end of operation of the electric blower 23 may be detected. In this case, the 2 nd voltage V2 may be set by selecting, for example, one of the larger, smaller, or smaller differences between the voltages V, or the 2 nd voltage V2 may be set based on an average value of the variations Δ or a value obtained by appropriately weighting the variations Δ.
In the above embodiments, the electric cleaner 11 may be configured not to include the dust collection unit 22 but to be a blower or the like that blows dust by exhaust gas from the electric blower 23.
Further, the electric device is not limited to the electric cleaner 11, and can be applied to an electric tool such as an electric drill. In this case, for example, a motor or the like may be used as the electric part in addition to the electric blower 23.
According to at least one embodiment described above, the control unit 24 sets the 2 nd voltage V2 based on the amount of change in the voltage V of the secondary battery 25 at least at a certain point in time when the operation of the electric blower 23 is started and at a certain point in time when the operation is ended, specifically, sets the 2 nd voltage V2 relatively high when the amount of change Δ is relatively large. Therefore, for example, the 2 nd voltage V2 at which the electric blower 23 can start operating can be appropriately set for the internal resistance of the secondary battery 25 that varies depending on the degree of degradation, the temperature of the secondary battery 25, the ambient temperature, and the like, so that the operation can be restarted as early as possible while suppressing deep discharge of the secondary battery 25.
That is, for example, when the internal resistance of the secondary battery 25 is relatively small, the 2 nd voltage V2 can be set low while avoiding deep discharge of the secondary battery 25, the operation restriction of the electric blower 23 can be released earlier, and the early operation restart of the electric cleaner 11 can be achieved, and when the internal resistance of the secondary battery 25 is relatively large, the 2 nd voltage V2 can be set relatively high, and even when a large voltage drop occurs due to the internal resistance of the secondary battery 25 during operation of the electric blower 23, the deep discharge of the secondary battery 25 can be suppressed, and the early operation restart of the electric cleaner 11 can be achieved.
Further, the control unit 24 has a function of changing the current supplied to the electric blower 23 to adjust the output of the electric blower 23, and sets the 2 nd voltage V2 based on the amount of change Δ of the voltage V of the secondary battery 25 and the current of the electric blower 23 when the amount of change Δ is detected, so that even when there are a plurality of operation modes or the like and the currents are different depending on the output of the electric blower 23, the 2 nd voltage V2 can be set for the voltage drop that occurs depending on the respective currents, so that the operation can be restarted as early as possible while suppressing the deep discharge of the secondary battery 25.
Further, the control unit 24 sets the 2 nd voltage V2 based on the discharge capacity of the secondary battery 25 predicted from the voltage V of the secondary battery 25 based on the data stored in advance indicating the correspondence between the voltage V of the secondary battery 25 and the discharge capacity, and can set the 2 nd voltage V2 with higher accuracy by further considering the remaining discharge capacity of the secondary battery 25.
Further, by setting the 2 nd voltage V2 further in consideration of the temperature T of the secondary battery 25 at the end of the operation of the electric blower 23, the control unit 24 can accurately predict the internal resistance of the secondary battery 25 that varies depending on the temperature T, and can further improve the setting accuracy of the 2 nd voltage V2. For example, although the intrinsic internal resistance of the secondary battery 25 is relatively large, it is conceivable that the temperature T becomes high and the internal resistance becomes relatively small due to heat generation of the secondary battery 25 immediately after the operation of the electric blower 23 is completed or the like, and therefore, by setting the 2 nd voltage V2 relatively high in consideration of the temperature T, the 2 nd voltage V2 can be set close to a value based on the intrinsic internal resistance, and deep discharge of the secondary battery 25 can be suppressed.
Further, the control unit 24 reduces the operation current of the electric blower 23 according to the amount of change Δ of the voltage V of the secondary battery 25 at least at a certain point of the start and end of the operation of the electric blower 23, so that the 2 nd voltage V2 can be set so that the operation can be restarted as early as possible while suppressing the deep discharge of the secondary battery 25.
That is, for example, when the internal resistance of the secondary battery 25 predicted from the variation amount Δ of the voltage V is small, or when the electric blower 23 is operated from a state in which the discharge capacity or the remaining amount of the secondary battery 25 is small, that is, a state in which the voltage V of the secondary battery 25 is relatively low, the operation in the operation mode in which the output is small or the operation in which the output in each operation mode is suppressed can be performed, and the deep discharge of the secondary battery 25 can be suppressed. Further, for example, even when the voltage V of the secondary battery 25 exceeds the 2 nd voltage V2 and approaches the 2 nd voltage V2 immediately after the operation restriction of the electric blower 23 is released, the control unit 24 can suppress the voltage drop by reducing the operation current of the electric blower 23, so that even if the 2 nd voltage V2 is set lower, deep discharge of the secondary battery 25 can be suppressed, and the electric sweeper 11 can be restarted earlier.
Further, since the 2 nd voltage V2 is set every time the electric blower 23 is operated, that is, every time the electric cleaner 11 is operated, the 2 nd voltage V2 can be appropriately set even for the fluctuation of the internal resistance of the secondary battery 25. Therefore, for example, even when the 2 nd voltage V2 is temporarily set to be high or low, if the internal resistance of the secondary battery 25 is changed thereafter, the 2 nd voltage V2 can be changed each time, so that the 2 nd voltage V2 corresponding to the state of the secondary battery 25 can be set.
Further, by applying the electric sweeper 11 using the electric blower 23 as the electric part, the secondary battery 25 can be reliably protected from deep discharge in the electric sweeper 11 using a large current, and the restart of use in a short time as possible can be realized.
In the above-described embodiment, the deterioration of the secondary battery 25 is estimated focusing on the characteristic that the resistance of the secondary battery 25 increases and the amount of the reduced voltage at the time of discharging also increases if the secondary battery 25 is deteriorated. The present invention is not limited to this, and degradation of the secondary battery 25 may be estimated from shortening of the charging time, focusing on the characteristic that the discharge capacity decreases if the secondary battery 25 is degraded. That is, the electrical device may include a charging time measuring unit that measures the length of the charging time of the secondary battery 25, and the voltage setting unit may set the predetermined voltage based on a change in the charging time of the secondary battery 25. The predetermined voltage is a threshold value for allowing the operation start of the electric motor, and is "the 2 nd voltage V2" described in the above embodiment. The predetermined voltage is set such that the predetermined voltage is set to be greater than before, in such a manner that the charging time taken to raise the voltage of the secondary battery 25 by a certain amount is shorter than before.
Several embodiments of the present invention have been described, but these embodiments are presented by way of example and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, substitutions, and changes can be made without departing from the spirit of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.
Claims (6)
1. An electrical apparatus, characterized in that,
the device is provided with:
an electric unit that operates by power supply from the secondary battery;
a voltage detection means for detecting a voltage of the secondary battery;
an input unit for inputting an instruction from the outside in response to start of operation of the electric unit;
an operation start control unit configured to control the electric unit to start operation if an instruction from the outside is input from the input unit when the voltage of the secondary battery is greater than a predetermined voltage; and
and a voltage setting unit that sets the predetermined voltage based on a difference between the voltage of the secondary battery at a timing before the start of the operation of the electric unit and the voltage of the secondary battery after a predetermined time from the start of the operation, or a difference between the voltage of the secondary battery at a timing when the operation of the electric unit is stopped and the voltage of the secondary battery after a predetermined time from the stop.
2. The electrical device of claim 1, wherein,
the voltage setting unit has a function of changing a current supplied to the electric unit to adjust an output of the electric unit, and sets the predetermined voltage based on the difference and the current of the electric unit when the difference is detected.
3. An electrical device according to claim 1 or 2, characterized in that,
the voltage setting unit sets the predetermined voltage based on the voltage of the secondary battery predicted from the voltage of the secondary battery at a timing before the start of the operation of the electric unit and the discharge capacity of the secondary battery predicted from the voltage of the secondary battery after a predetermined time from the start of the operation, or the voltage of the secondary battery predicted from the voltage of the secondary battery at a timing when the operation of the electric unit is stopped and the discharge capacity of the secondary battery predicted from the voltage of the secondary battery after a predetermined time from the stop, based on the data stored in advance and representing the correspondence between the voltage of the secondary battery and the discharge capacity.
4. An electrical device according to claim 1 or 2, characterized in that,
a temperature detection means for detecting the temperature of the secondary battery;
the voltage setting unit further sets the predetermined voltage in consideration of the temperature of the secondary battery at the end of the operation of the electric unit.
5. An electrical device according to claim 1 or 2, characterized in that,
the operation start control unit reduces the operation current of the electric unit based on the difference.
6. An electrical device according to claim 1 or 2, characterized in that,
the electric part is an electric blower.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
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| JP2018081398A JP7061007B2 (en) | 2018-04-20 | 2018-04-20 | Electrical equipment |
| JP2018-081398 | 2018-04-20 |
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| CN110391681A CN110391681A (en) | 2019-10-29 |
| CN110391681B true CN110391681B (en) | 2023-04-28 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006296085A (en) * | 2005-04-11 | 2006-10-26 | Furukawa Electric Co Ltd:The | Vehicular power supply control apparatus and power supply control system |
| JP2006327487A (en) * | 2005-05-27 | 2006-12-07 | Fujitsu Ten Ltd | Vehicle control device and method |
| JP2017192242A (en) * | 2016-04-15 | 2017-10-19 | 日立アプライアンス株式会社 | Motor drive device and vacuum cleaner having the same |
| JP2018019998A (en) * | 2016-08-05 | 2018-02-08 | 東芝ライフスタイル株式会社 | Vacuum cleaner |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4014995B2 (en) | 2002-10-11 | 2007-11-28 | 古河電気工業株式会社 | Storage battery deterioration determination method and apparatus |
| JP2006150997A (en) | 2004-11-25 | 2006-06-15 | Alpine Electronics Inc | Battery consumption suppression device and battery consumption suppression method |
| US9457686B2 (en) | 2014-04-29 | 2016-10-04 | Ford Global Technology, Llc | Method to adjust battery minimum state of charge limits based on battery power capability |
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2018
- 2018-04-20 JP JP2018081398A patent/JP7061007B2/en active Active
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006296085A (en) * | 2005-04-11 | 2006-10-26 | Furukawa Electric Co Ltd:The | Vehicular power supply control apparatus and power supply control system |
| JP2006327487A (en) * | 2005-05-27 | 2006-12-07 | Fujitsu Ten Ltd | Vehicle control device and method |
| JP2017192242A (en) * | 2016-04-15 | 2017-10-19 | 日立アプライアンス株式会社 | Motor drive device and vacuum cleaner having the same |
| JP2018019998A (en) * | 2016-08-05 | 2018-02-08 | 東芝ライフスタイル株式会社 | Vacuum cleaner |
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| Publication number | Publication date |
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| JP7061007B2 (en) | 2022-04-27 |
| CN110391681A (en) | 2019-10-29 |
| JP2019193368A (en) | 2019-10-31 |
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