WO1998039831A1 - Portable apparatus for recharging batteries in drills, screwers, portable electric tools generally fed by internal batteries - Google Patents

Portable apparatus for recharging batteries in drills, screwers, portable electric tools generally fed by internal batteries Download PDF

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Publication number
WO1998039831A1
WO1998039831A1 PCT/EP1997/005522 EP9705522W WO9839831A1 WO 1998039831 A1 WO1998039831 A1 WO 1998039831A1 EP 9705522 W EP9705522 W EP 9705522W WO 9839831 A1 WO9839831 A1 WO 9839831A1
Authority
WO
WIPO (PCT)
Prior art keywords
batteries
recharging
circuits
tool
charging
Prior art date
Application number
PCT/EP1997/005522
Other languages
French (fr)
Inventor
Mauro Paganini
Giorgio Paganini
Original Assignee
P.M.G. S.N.C. Dei F. Lli Paganini Mauro E Giorgio
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by P.M.G. S.N.C. Dei F. Lli Paganini Mauro E Giorgio filed Critical P.M.G. S.N.C. Dei F. Lli Paganini Mauro E Giorgio
Priority to AU49448/97A priority Critical patent/AU4944897A/en
Publication of WO1998039831A1 publication Critical patent/WO1998039831A1/en

Links

Classifications

    • 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
    • H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
    • 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
    • H02J7/0042—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by the mechanical construction
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/007—Regulation of charging or discharging current or voltage
    • H02J7/0071—Regulation of charging or discharging current or voltage with a programmable schedule
    • 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
    • H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
    • H02J7/342—The other DC source being a battery actively interacting with the first one, i.e. battery to battery charging

Definitions

  • the invention concerns electric feed to portable tools and other types of apparatus by batteries.
  • electric equipment such as drills, screwers and many other battery-fed tools is greatly limited by the difficulty of connecting them when needed to an electricity main that may be distant or inaccessible.
  • the above invention eliminates or considerably reduces this difficulty as well as offering other important advantages as will now be explained.
  • Subject of the invention is an appliance for recharging batteries fitted inside drills, screwers and generally-speaking in battery-fed portable electric tools used where electric mains are either unavailable or distant.
  • Said appliance comprises a portable container, one or more high power batteries (here cailed recharging batteries to be recharged at the main electricity supply), for recharging batteries fitted in tools, here called tool batteries, by connecting them to the recharging batteries, also comprising electronic drive circuits, circuits for protecting both the recharging and the tool batteries, for control of voltage during recharging, for the amount of current, for temperature, and for recharging times.
  • high power batteries here cailed recharging batteries to be recharged at the main electricity supply
  • tool batteries by connecting them to the recharging batteries
  • electronic drive circuits circuits for protecting both the recharging and the tool batteries, for control of voltage during recharging, for the amount of current, for temperature, and for recharging times.
  • the electronic drive circuit comprises one or more circuits for charging the tool batteries, controlled by a microprocessor.
  • the electronic drive circuit comprises one or more circuits for discharging and recharging those tool batteries that, before recharging, need to have the residual charge removed, such as nickel-cadmium, or nickel-metal-hydride batteries. The current remaining from residual charge in the batteries to be recharged is used again for recharging them.
  • the electronic control circuit for batteries to be recharged comprises a circuit for automatic release of the tool circuits on reaching minimum voltage preset for the recharging battery, a circuit for automatic release of the charging circuits on reaching maximum voltage preset for the recharging battery and a circuit for indication, by a LED, of the level of voltage in the recharging battery.
  • the main on-off switch Placed on the surface of the container are: the main on-off switch, the socket for connecting tool batteries to the mains through a suitable cable, fuses, the switch for charging tool batteries, pilot lights for control, for warnings, for the level of charge in the batteries, and a centrally balanced handle with which to carry the whole.
  • the recharging batteries are preferably of 6 to 14.4 volts and of different capacities.
  • the invention offers evident advantages.
  • Fig. 1 The portable apparatus subject of the invention, in perspective.
  • Fig. 2 A wheeled version of the above, in perspective.
  • FIG. 3 Block layout of the electronic drive and control circuits of the appa- ratus comprising circuits for discharge-recharge of tool batteries and for control on the recharging batteries.
  • Fig. 4 Block diagram of the electronic circuits for discharge-recharge of tool batteries.
  • FIG. 5 Block diagram of electronic circuits of the recharging batteries.
  • the apparatus 10 of a box-shaped structure 11 comprises inside it a current transformer 12, recharging batteries 13 and 14, electronic logic card 15 for indicating the state of these batteries, electronic cards 16, 17 for checking on discharge-charge of the tool batteries.
  • the handle 21 is placed in the barycenter of the upper surface 20. On its sides are ventilation grids 22 served by an internal fan 24 below.
  • depressions 30, 31 for receiving the tool batteries to be recharged, and the socket 32 connected to the internal batteries by a cable 35 to plug into mains electricity. Attached to cable 35 is a plug 36 to connect with the socket 32 and another plug 37 to connect with mains electricity.
  • Figure 2 shows an apparatus 50 similar to that in Figure 1 but larger and more powerful.
  • Figure 3 shows the main operative circuits in a block diagram 60
  • cable 61 feeds current to circuit 63 for charging the recharging batteries 13, 14 controlled by circuit
  • the charging-discharging circuits 16, 17 remove residual charge from batteries 70, 71 and recharge them.
  • Residual energy is transferred to recharging batteries 13, 14 so recove- ring a considerable amount of energy.
  • FIG. 4 shows details of the discharge-charge circuit 16, 17.
  • the sensor 78 for controling temperature of the tool batteries 70, 71 , is connected to the microprocessor.
  • Figure 5 shows the control circuit 15 of the recharging batteries.
  • Circuit 80 for minimum voltage control with switch 82 releases the tool battery circuits while circuit 81 for maximum voltage control releases, with its switch 83, the charging circuit 63 on reaching preset limit values.
  • Circuit 84 signals the voltage level in the internal batteries by means of a

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Secondary Cells (AREA)

Abstract

Apparatus (10) comprising a transportable container (11), one or more recharging batteries (13, 14), electronic circuits (16, 17) for control, protection and control (15) of voltage, of the amount of current, of the temperature, of charging time, both for discharging-charging the batteries fitted inside drills, screwers, portable electric apparatuses and tools generally, use being made of the charge of current taken from their residual charge, and also for recharging said recharging batteries (13, 14) by connecting them to the electricity means.

Description

Portable apparatus for recharging batteries in drills, screwers, portable electric tools generally fed by internal batteries
The invention concerns electric feed to portable tools and other types of apparatus by batteries. At present the use of electric equipment such as drills, screwers and many other battery-fed tools is greatly limited by the difficulty of connecting them when needed to an electricity main that may be distant or inaccessible. The above invention eliminates or considerably reduces this difficulty as well as offering other important advantages as will now be explained.
Subject of the invention is an appliance for recharging batteries fitted inside drills, screwers and generally-speaking in battery-fed portable electric tools used where electric mains are either unavailable or distant. Said appliance comprises a portable container, one or more high power batteries (here cailed recharging batteries to be recharged at the main electricity supply), for recharging batteries fitted in tools, here called tool batteries, by connecting them to the recharging batteries, also comprising electronic drive circuits, circuits for protecting both the recharging and the tool batteries, for control of voltage during recharging, for the amount of current, for temperature, and for recharging times.
The electronic drive circuit comprises one or more circuits for charging the tool batteries, controlled by a microprocessor. In a preferred type of execution the electronic drive circuit comprises one or more circuits for discharging and recharging those tool batteries that, before recharging, need to have the residual charge removed, such as nickel-cadmium, or nickel-metal-hydride batteries. The current remaining from residual charge in the batteries to be recharged is used again for recharging them.
The electronic control circuit for batteries to be recharged comprises a circuit for automatic release of the tool circuits on reaching minimum voltage preset for the recharging battery, a circuit for automatic release of the charging circuits on reaching maximum voltage preset for the recharging battery and a circuit for indication, by a LED, of the level of voltage in the recharging battery.
On the surface of the container are depressions for the tool batteries to be recharged, with contacts for automatically connecting the recharging circuits to said batteries.
Inside the container are two recharging batteries and a transformer for transforming main current into direct current.
Placed on the surface of the container are: the main on-off switch, the socket for connecting tool batteries to the mains through a suitable cable, fuses, the switch for charging tool batteries, pilot lights for control, for warnings, for the level of charge in the batteries, and a centrally balanced handle with which to carry the whole.
On the sides of the handle are ventilation grids served by an internal fan placed underneath. The recharging batteries are preferably of 6 to 14.4 volts and of different capacities.
The invention offers evident advantages.
Problems of electric feed are solved for using portable battery operated types of apparatus in places where main electricity is non-existent or far away, such as on work sites and in the open air.
Independence from electricity mains greatly increases safety at work especially where working conditions are such that connection to the mains would constitute a high risk. By first carrying out controlled discharge and then charging the batteries the negative effect of residual charge is avoided.
Utilization of the residual charge in nickel-cadmium batteries and similar types during discharge avoids dissipation of such energy enabling it to be used again for charging the recharging batteries, and therefore the tool batteries, ensuring recovery of a considerable quantity of energy.
The possibility of charging the recharging batteries in the appliance subject of the invention, by connecting it to the electric mains at the end of a working day, makes sure that the tools it serves can be used for at least another full day's work.
Simultaneous control over time, maximum peak of battery voltage and temperature guarantees a complete and optimum recharging phase for the tool batteries.
Characteristics and purposes of the disclosure will be made still clearer by the following examples of its execution illustrated by diagrammatically drawn figures.
Fig. 1 The portable apparatus subject of the invention, in perspective.
Fig. 2 A wheeled version of the above, in perspective.
Fig. 3 Block layout of the electronic drive and control circuits of the appa- ratus comprising circuits for discharge-recharge of tool batteries and for control on the recharging batteries.
Fig. 4 Block diagram of the electronic circuits for discharge-recharge of tool batteries.
Fig. 5 Block diagram of electronic circuits of the recharging batteries. The apparatus 10 of a box-shaped structure 11 , comprises inside it a current transformer 12, recharging batteries 13 and 14, electronic logic card 15 for indicating the state of these batteries, electronic cards 16, 17 for checking on discharge-charge of the tool batteries.
The handle 21 is placed in the barycenter of the upper surface 20. On its sides are ventilation grids 22 served by an internal fan 24 below.
Also on said surface 20 are depressions 30, 31 for receiving the tool batteries to be recharged, and the socket 32 connected to the internal batteries by a cable 35 to plug into mains electricity. Attached to cable 35 is a plug 36 to connect with the socket 32 and another plug 37 to connect with mains electricity.
Other devices on said surface are: the main on-off switch 33, fuses 38, the switch for recharging of the tool batteries and pilot lights 39 to show battery charge levels.
Figure 2 shows an apparatus 50 similar to that in Figure 1 but larger and more powerful.
On its upper surface 51 , similar to that 20 of the apparatus 10 described above, are the devices and means as in Fig. 1 , numbered as before. This apparatus, on wheels 52, is drawn along by a front handle 53.
In spite of its greater weight and size compared with apparatus 10, transport to where this larger version is needed is made equally easy.
Figure 3 shows the main operative circuits in a block diagram 60
Through the system of electrical protection 62, cable 61 feeds current to circuit 63 for charging the recharging batteries 13, 14 controlled by circuit
15 comprising adequate signalling means.
The charging-discharging circuits 16, 17 remove residual charge from batteries 70, 71 and recharge them.
Residual energy is transferred to recharging batteries 13, 14 so recove- ring a considerable amount of energy.
Figure 4 shows details of the discharge-charge circuit 16, 17.
It will be clearly seen that through the direct current discharge 75 and recharge 76 circuits controlled by microprocessor 77, recharging batteries
13, 14 charge the tool batteries 70,71. The sensor 78, for controling temperature of the tool batteries 70, 71 , is connected to the microprocessor.
Figure 5 shows the control circuit 15 of the recharging batteries.
Circuit 80 for minimum voltage control with switch 82 releases the tool battery circuits while circuit 81 for maximum voltage control releases, with its switch 83, the charging circuit 63 on reaching preset limit values.
Circuit 84 signals the voltage level in the internal batteries by means of a
LED-illuminated bar 39.

Claims

Claims
1 . Apparatus (10, 50) for recharging the batteries (70, 71) fitted into drills, screwers, portable electric tools or apparatuses generally, characterized in that it comprises, inside a transportable container (11) one or more high-powered batteries (13, 14) here called recharging batteries, for recharging these latter by plugging into the electric mains, for recharging the batteries (70, 71) in the portable apparatuses, here called tool batteries by connecting them to the recharging batteries, electronic control circuits (16, 17, 60, 63, 75, 76, 77), for protection (62) of the recharging batteries (13, 14) and the tool batteries, circuits (15, 78, 80, 81 , 84) for control, during battery recharging, of voltage, amount of current, temperature, charging time.
2. Apparatus as in claim 1 , characterized in that an electronic control circuit (60) comprises one or more circuits (16, 17, 76) controlled by a microprocessor (77) for charging the tool batteries (70, 71).
3. Apparatus as in claim 1 , characterized in that an electronic control circuit (60) comprises one or more circuits (16, 17, 75, 76) operated by a microprocessor (77) for discharging-charging tool batteries (70, 71) of the type that, before recharging, must be freed of their residual charge, like nickel-cadmium batteries or nickel-metal-hydride batteries.
4. Apparatus as in claim 1 , characterized in that an electronic control circuit (60) comprises one or more circuits (16, 17, 75, 76) operated by a microprocessor (77) for discharging-charging tool batteries (70, 71) of the type that, before recharging, must be freed of their residual charge, like nickel-cadmium batteries or nickel-metal-hydride batteries, the current from the residual charge in the batteries (70, 71 ) to be recharged being used to recharge them.
5. Apparatus as in claim 1 , characterized in that an electronic control circuit (15, 84) for the recharging batteries (13, 14) comprises a circuit (80) for automatic release by means of a switch (82) of the tool circuits on reaching the minimum voltage preset for the recharging batteries (13, 14), a circuit (81) for automatic release by means of a switch (83) of the charging circuits on reaching the maximum voltage preset for the recharging batteries (13, 14) and a circuit (84) with LED-luminated indication (39) of the level of voltage in the recharging batteries.
6. Apparatus as in claim 1 , characterized in that depressions (30, 31) are made in the surface (20) of the container (11) for the tool batteries (70, 71) to be recharged, provided with contacts for automatic connection of the recharging circuits (16, 17, 60, 75. 76. 77) with said batteries.
7. Apparatus as in clalim 1 , characterized in that the container (11 ) houses two recharging batteries (13, 14) and a transformer (12) for transforming mains electricity current into direct current.
8. Apparatus as in claim 1 , characterized in that, placed on the surface (20) of the container (11) are: the on-off switch (33) for the recharging apparatus, the socket (32) for connecting the internal batteries (13, 14) to mains electricity by a suitable cable (35), protective fuses (38), switch (40) for recharging the tool batteries, pilot lights (39) to show the charge level of the batteries.
9. Apparatus as in claim 1 , characterized in that voltage of the tool batteries (70,71) is from 6 to 14.4 volt of different capacities.
10. Apparatus (10) as in claim 1 , characterized in that a barycentral handle (21) is placed on the top of the container (11) for carrying it by hand.
1 1. Apparatus (10) as in claim 10, characterized in that ventilation grids (22), served by an internal fan below, are placed on the sides of the handle.
12. Apparatus (10) as in claim 1 , characterized in that it is portable.
13. Apparatus (50) as in claim 1 , characterized in that it moves on wheels.
PCT/EP1997/005522 1997-03-05 1997-10-08 Portable apparatus for recharging batteries in drills, screwers, portable electric tools generally fed by internal batteries WO1998039831A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU49448/97A AU4944897A (en) 1997-03-05 1997-10-08 Portable apparatus for recharging batteries in drills, screwers, portable electric tools generally fed by internal batteries

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT97NO000005A IT1297436B1 (en) 1997-03-05 1997-03-05 PORTABLE ENERGY RECOVERY CHARGING SYSTEM FOR DISCHARGING AND CHARGING BATTERIES USED ON DRILLS, SCREWDRIVERS AND TOOLS
ITNO97A000005 1997-03-05

Publications (1)

Publication Number Publication Date
WO1998039831A1 true WO1998039831A1 (en) 1998-09-11

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AU (1) AU4944897A (en)
IT (1) IT1297436B1 (en)
TW (1) TW382155B (en)
WO (1) WO1998039831A1 (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6686462B2 (en) 1997-02-28 2004-02-03 The Regents Of The University Of California Antiviral compounds and methods of administration
EP2686935A1 (en) * 2011-03-16 2014-01-22 HILTI Aktiengesellschaft Mobile charging device
ITVA20130023A1 (en) * 2013-05-13 2014-11-14 All Energy Systems S R L PORTABLE AND INDEPENDENT EQUIPMENT FOR CONTINUOUS VOLTAGE SUPPLY OF USERS AS STANDARD BATTERY CHARGERS FOR ELECTRIC TOOLS AND SIMILAR WITHOUT CONNECTION TO THE ELECTRICAL MAINS.
EP3352324A1 (en) * 2017-01-23 2018-07-25 Panasonic Intellectual Property Management Co., Ltd. Charge adapter for two batteries
US10862176B2 (en) 2018-06-15 2020-12-08 Florida Power & Light Company Portable rechargeable battery pack with a selectable battery switch and state of charge display for cordless power tools
US11114878B2 (en) 2018-03-26 2021-09-07 Milwaukee Electric Tool Corporation High-power battery-powered portable power source
USD933010S1 (en) 2019-05-29 2021-10-12 Milwaukee Electric Tool Corporation Portable power source
US11271415B2 (en) 2018-05-18 2022-03-08 Milwaukee Electric Tool Corporation Portable power source
EP3982461A1 (en) * 2020-10-09 2022-04-13 Hilti Aktiengesellschaft Mobile energy storage device and method for operating a mobile energy storage device

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EP0291131A1 (en) * 1987-05-15 1988-11-17 Emerson Electric Co. Tool for intermediate voltage
US5083076A (en) * 1989-11-13 1992-01-21 P.S.O. Electric, Incorporated Portable battery booster
WO1993014548A1 (en) * 1992-01-14 1993-07-22 Robert Bosch Gmbh Method of charging accumulators
US5432427A (en) * 1993-11-23 1995-07-11 Chiang; Chih-Cheng Battery charging control system
US5602460A (en) * 1995-04-28 1997-02-11 Motorola, Inc. Overcharge current protection circuit and battery pack using same

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0291131A1 (en) * 1987-05-15 1988-11-17 Emerson Electric Co. Tool for intermediate voltage
US5083076A (en) * 1989-11-13 1992-01-21 P.S.O. Electric, Incorporated Portable battery booster
WO1993014548A1 (en) * 1992-01-14 1993-07-22 Robert Bosch Gmbh Method of charging accumulators
US5432427A (en) * 1993-11-23 1995-07-11 Chiang; Chih-Cheng Battery charging control system
US5602460A (en) * 1995-04-28 1997-02-11 Motorola, Inc. Overcharge current protection circuit and battery pack using same

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6686462B2 (en) 1997-02-28 2004-02-03 The Regents Of The University Of California Antiviral compounds and methods of administration
EP2686935A1 (en) * 2011-03-16 2014-01-22 HILTI Aktiengesellschaft Mobile charging device
ITVA20130023A1 (en) * 2013-05-13 2014-11-14 All Energy Systems S R L PORTABLE AND INDEPENDENT EQUIPMENT FOR CONTINUOUS VOLTAGE SUPPLY OF USERS AS STANDARD BATTERY CHARGERS FOR ELECTRIC TOOLS AND SIMILAR WITHOUT CONNECTION TO THE ELECTRICAL MAINS.
EP3352324A1 (en) * 2017-01-23 2018-07-25 Panasonic Intellectual Property Management Co., Ltd. Charge adapter for two batteries
JP2018121401A (en) * 2017-01-23 2018-08-02 パナソニックＩｐマネジメント株式会社 Charging adaptor
US11114878B2 (en) 2018-03-26 2021-09-07 Milwaukee Electric Tool Corporation High-power battery-powered portable power source
US11996526B2 (en) 2018-03-26 2024-05-28 Milwaukee Electric Tool Corporation High-power battery-powered portable power source
US11271415B2 (en) 2018-05-18 2022-03-08 Milwaukee Electric Tool Corporation Portable power source
US11742771B2 (en) 2018-05-18 2023-08-29 Milwaukee Electric Tool Corporation Portable power source
US10862176B2 (en) 2018-06-15 2020-12-08 Florida Power & Light Company Portable rechargeable battery pack with a selectable battery switch and state of charge display for cordless power tools
USD933010S1 (en) 2019-05-29 2021-10-12 Milwaukee Electric Tool Corporation Portable power source
USD955334S1 (en) 2019-05-29 2022-06-21 Milwaukee Electric Tool Corporation Portable power source
EP3982461A1 (en) * 2020-10-09 2022-04-13 Hilti Aktiengesellschaft Mobile energy storage device and method for operating a mobile energy storage device
WO2022073993A1 (en) * 2020-10-09 2022-04-14 Hilti Aktiengesellschaft Mobile energy store and method for operating a mobile energy store

Also Published As

Publication number Publication date
AU4944897A (en) 1998-09-22
ITNO970005A1 (en) 1998-09-05
IT1297436B1 (en) 1999-12-17
TW382155B (en) 2000-02-11

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