WO2009048331A2 - Electric tool with protection controlled by battery monitoring - Google Patents
Electric tool with protection controlled by battery monitoring Download PDFInfo
- Publication number
- WO2009048331A2 WO2009048331A2 PCT/NL2008/050644 NL2008050644W WO2009048331A2 WO 2009048331 A2 WO2009048331 A2 WO 2009048331A2 NL 2008050644 W NL2008050644 W NL 2008050644W WO 2009048331 A2 WO2009048331 A2 WO 2009048331A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- battery
- appliance
- control circuit
- monitoring circuit
- circuit
- Prior art date
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
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/0031—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using battery or load disconnect circuits
-
- 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
Definitions
- the invention relates to an electrical appliance provided with a controllable electric motor and to be powered by a rechargeable battery, comprising an electric motor, an electronic switch element for controlling the power fed to the electric motor, a control circuit for the electronic switch element and operating means for the control circuit, wherein the appliance is adapted for power supply by a battery provided with a monitoring circuit.
- the monitoring circuit has the function here of monitoring the state of the rechargeable battery. This is because there are rechargeable batteries which must be charged or discharged with the necessary caution in order to prevent premature breakdown or even spontaneous combustion or explosion. These are particularly lithium-ion batteries, although it is not possible to rule out batteries of other type having similar properties and requiring monitoring.
- the measures according to the invention are also applicable to such batteries.
- One of the functions of the monitoring circuit which will usually be incorporated in the battery unit because it must perform monitoring functions during both charging and discharging, is to stop the discharge current during use, i.e. discharge of the battery, for instance when the terminal voltage of the battery threatens to fall below a minimum value. The terminal voltage actually falling below this value would result in destruction of the battery.
- Incorporated for this purpose in the battery unit is not only a monitoring circuit but also a switch which, with corresponding operation by the monitoring circuit, interrupts the discharge current. This switch, usually embodied as semiconductor, results in an increase in the cost price of the battery unit.
- the invention has for its object to provide measures whereby the above stated problem is obviated.
- control circuit is adapted to be controlled by the monitoring circuit of a battery connected to the appliance.
- This measure has the result that - to the extent the safety requirements allow - it is no longer necessary for a separate switch to be present in the battery unit because the function thereof is taken over by the semiconductor switch which is controlled by the control circuit of the appliance and which is normally used to regulate the power to be supplied to the electric motor.
- control circuit is adapted to switch off the electronic switch element under the control of the monitoring circuit of the battery. This embodiment results in the electronic switch element simply taking over the safety function resulting in switch-off.
- the switch incorporated in the battery unit has the drawback that, as the minimum terminal voltage draws closer, it switches off completely and blocks the operation of the combination of battery and appliance, despite the fact that the discharging state of the battery in principle allows further discharge of the battery, albeit with a smaller discharge current, so that the user of the appliance can continue to work.
- a preferred embodiment therefore provides the option that the control circuit is adapted to reduce the power fed to the electric motor by the electronic switch element under the control of the monitoring circuit of the battery. This creates the option that, as the minimum allowable terminal voltage of the battery draws closer, the discharge current can be limited by using the switch in modulating manner, whereby the discharge current of the battery is limited but it is however still possible to continue working, albeit with less power. It is noted here that safety requirements may require the presence of a switch which is mechanical or embodied as semiconductor in the battery unit; the above stated advantages of the modulating electronic switch are also obtained in combination with the presence of this switch.
- the invention also relates to a rechargeable battery, wherein this battery is adapted to be connected to an electrical appliance as according to any of the foregoing claims, wherein the battery is provided with a monitoring circuit, wherein the monitoring circuit is adapted to control the control circuit of the appliance connected to the battery.
- a simple preferred embodiment provides the measure that the control circuit is adapted to be deactivated by the monitoring circuit of the battery connected to the appliance.
- another embodiment provides a rechargeable battery with a monitoring circuit adapted to deactivate the control circuit of the appliance connected to the battery.
- the monitoring circuit present in the battery unit requires electric energy to be able to function. So as not to discharge the battery prematurely, this monitoring circuit is deactivated according to the prior art when the battery has not been used for a time. This monitoring circuit must however be re-activated when charging or discharging of the battery begins again.
- a preferred embodiment of the invention provides the measure that the control circuit is adapted to activate the monitoring circuit of the battery connected to the appliance. It hereby becomes possible for the monitoring circuit to be also activated when the appliance is switched on.
- the invention therefore likewise relates to a rechargeable battery of the above stated type wherein the monitoring circuit is adapted to be activated by the control circuit of the appliance connected to the battery.
- Another preferred embodiment provides the measure that the control circuit is adapted to deactivate the monitoring circuit of the battery connected to the appliance. When the appliance is switched off, the monitoring circuit associated with the battery is hereby also deactivated.
- the invention therefore also relates to a rechargeable battery of the above stated type wherein the monitoring circuit is adapted to be deactivated by the control circuit of the appliance connected to the battery.
- the appliance is adapted to form a single communication connection between the control circuit and the monitoring circuit of a battery connected to the appliance.
- This connection is then preferably adapted to transmit signals in both directions.
- the invention moreover relates to a rechargeable battery of the above stated type wherein the battery is adapted to form a single communication connection between the monitoring circuit and the control circuit of the appliance connected to the battery.
- This communication connection entails some problems of circuit engineering. At least some of these are resolved when the control circuit is adapted to block activation of the switch element when the communication connection is earthed. Earthing, i.e. connecting the communication connection on the side of the battery unit to the minus terminal of the battery, can be easily implemented in circuit engineering terms by switching, in the conductive mode, a switching semiconductor which is normally in the blocking mode so that it does not normally disrupt the receiving function of the monitoring circuit incorporated in the battery unit.
- Figure 1 shows a circuit diagram of a first embodiment of a combination of an appliance and a battery unit according to the present invention
- Figure 2 shows a circuit diagram of a second embodiment of a combination of an appliance and a battery unit according to the present invention.
- FIG. 1 shows circuit diagram 1 of an appliance such as for instance an electric hand tool, such as a drill.
- the appliance comprises a switch unit 2 and an electric motor 3. Coupled removably to the appliance is a battery unit 4.
- Battery unit 4 comprises a series of battery cells 5, such as lithium-ion cells, and a monitoring circuit 6 for monitoring the charging and discharging processes of battery cells 5. Monitoring circuit 6 is connected for this purpose to each of the cells S.
- Switch unit 2 comprises a mechanical switch 7, a semiconductor switch 8 connected in series thereto and a control circuit 9 for controlling semiconductor switch 7.
- Control circuit 9 is connected for power supply to the positive and negative feed connection.
- this circuit is as follows: when battery unit 4 is connected to appliance 1, the user can - assuming that the battery unit is charged - close switch 7 by pressing a trigger (not shown in the drawing), after which, when the trigger is pressed further, the control circuit is controlled such that it gradually opens the semiconductor circuit and current is supplied to motor 3, and electric motor 3 will begin to run and appliance 1 will begin to operate.
- the circuit according to the present invention is distinguished from the prior art by providing a connection between monitoring circuit 6 of battery cells S and the control circuit 9.
- a first function of this connection lies in the control of semiconductor circuit 8 by monitoring circuit 6 when monitoring circuit 6 of the battery cells determines that further discharge of battery cells 5 is not desirable since the lifespan of the cells will hereby be shortened or a dangerous situation may even occur.
- the monitoring circuit 6 opens a switch arranged in series with battery cells 5 in battery unit 4, thereby preventing further discharge of battery cells 5.
- monitoring circuit 6 - in the embodiment shown in figure 1 - opens semiconductor circuit 8 via control circuit 9, or the semiconductor circuit is controlled such that the discharge is continued at a lower current.
- This strategy can for instance be followed in situations in which continuation of the discharge does not result in a decrease in the quality of the battery cells or in hazardous situations.
- the measure can otherwise be added here that in another situation, for instance when the terminal voltage of battery cells 5 falls further, the discharge current is cut off entirely.
- This measure can be included in the functionality of monitoring circuit 6 and in that of control circuit 9.
- This complete interruption can likewise be performed by semiconductor circuit 8, but can likewise be performed by the mechanical switch 7 normally operated by the trigger.
- This latter mechanical switch does however have to be embodied for this purpose as a relay. It is also possible for that matter for the above described function to be combined with maintaining of the semiconductor switch or relay in the battery as applied according to the prior art. This is particularly the case when semiconductor switch 8 is used to reduce the discharge current.
- a connection between the two circuits 6, 9 which extends via a pair of contacts 11 is provided for the purpose of transferring the signals from monitoring circuit 6 to control circuit 9.
- control circuit 9 can however also be applied for other purposes, such as to control the mode of monitoring circuit 6 by means of control circuit 9.
- Use is made here of the fact that, in respect of a low energy consumption, it is attractive to leave monitoring circuit 6 as much at rest as possible. Only when control circuit 9 is switched on by the trigger will control circuit 9 generate a signal to monitoring circuit 6 to place it in an active position. The reverse is also possible; when control circuit 9 is switched off, the appliance is switched off so that no more current is drawn from the battery cells and there is no longer any need for monitoring circuit 6 to function. In such situations it is attractive that the control circuit is adapted to generate a relevant signal to the monitoring circuit so that this latter is deactivated.
- the output connection of the monitoring circuit is also provided with a transistor 13.
- the dual use of the connection between monitoring circuit 6 and control circuit 9 can, also in respect of the low voltage levels available, result in problems of circuit engineering which can for instance be solved by providing the monitoring circuit with a controllable semiconductor forming the connection to earth, such as the transistor 13 shown in the figure, which prior to generating a blocking signal to control circuit 9 earths the relevant signal line so that the control circuit blocks operation of semiconductor switch 8 and discharge from battery cells 5 is further blocked.
- the structure of the embodiment shown in figure 2 broadly corresponds with that of the embodiment shown in figure 1, except that the connection between control circuit 9 and the positive feed connection 12 is broken. This has the consequence that the operation of the control circuit directly depends on the connection to monitoring circuit 6 of battery unit 4; only when monitoring circuit 6 activates the control circuit can this latter fulfil its function, hi this respect transistor 13 is omitted.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Secondary Cells (AREA)
Abstract
The invention relates to an electrical appliance provided with a controllable electric motor (3) and to be powered by a rechargeable battery (5), comprising an electric motor, an electronic switch element (8) for controlling the electric power fed to the electric motor, a control circuit (9) for the electronic switch element and operating means for the control circuit, wherein the appliance is adapted for power supply by a battery provided with a monitoring circuit (6), wherein the control circuit is adapted to be controlled by the monitoring circuit of a battery connected to the appliance. The invention also relates to a rechargeable battery which is provided with a monitoring circuit, wherein the monitoring circuit is adapted to control the control circuit of the appliance connected to the battery. A separate switch in the battery unit is hereby no longer necessary because the function thereof is taken over by the semiconductor switch controlled by the control circuit of the appliance.
Description
Electric tool with protection controlled by battery monitoring
The invention relates to an electrical appliance provided with a controllable electric motor and to be powered by a rechargeable battery, comprising an electric motor, an electronic switch element for controlling the power fed to the electric motor, a control circuit for the electronic switch element and operating means for the control circuit, wherein the appliance is adapted for power supply by a battery provided with a monitoring circuit.
Such appliances are generally known, particularly though not exclusively, as electric hand tools. The monitoring circuit has the function here of monitoring the state of the rechargeable battery. This is because there are rechargeable batteries which must be charged or discharged with the necessary caution in order to prevent premature breakdown or even spontaneous combustion or explosion. These are particularly lithium-ion batteries, although it is not possible to rule out batteries of other type having similar properties and requiring monitoring. The measures according to the invention are also applicable to such batteries.
One of the functions of the monitoring circuit, which will usually be incorporated in the battery unit because it must perform monitoring functions during both charging and discharging, is to stop the discharge current during use, i.e. discharge of the battery, for instance when the terminal voltage of the battery threatens to fall below a minimum value. The terminal voltage actually falling below this value would result in destruction of the battery. Incorporated for this purpose in the battery unit is not only a monitoring circuit but also a switch which, with corresponding operation by the monitoring circuit, interrupts the discharge current. This switch, usually embodied as semiconductor, results in an increase in the cost price of the battery unit.
The invention has for its object to provide measures whereby the above stated problem is obviated.
This object is achieved in that the control circuit is adapted to be controlled by the monitoring circuit of a battery connected to the appliance. This measure has the result that - to the extent the safety requirements allow - it is no longer necessary for a
separate switch to be present in the battery unit because the function thereof is taken over by the semiconductor switch which is controlled by the control circuit of the appliance and which is normally used to regulate the power to be supplied to the electric motor.
According to a first preferred embodiment, the control circuit is adapted to switch off the electronic switch element under the control of the monitoring circuit of the battery. This embodiment results in the electronic switch element simply taking over the safety function resulting in switch-off.
Because of its discrete manner of functioning, the switch incorporated in the battery unit has the drawback that, as the minimum terminal voltage draws closer, it switches off completely and blocks the operation of the combination of battery and appliance, despite the fact that the discharging state of the battery in principle allows further discharge of the battery, albeit with a smaller discharge current, so that the user of the appliance can continue to work. A preferred embodiment therefore provides the option that the control circuit is adapted to reduce the power fed to the electric motor by the electronic switch element under the control of the monitoring circuit of the battery. This creates the option that, as the minimum allowable terminal voltage of the battery draws closer, the discharge current can be limited by using the switch in modulating manner, whereby the discharge current of the battery is limited but it is however still possible to continue working, albeit with less power. It is noted here that safety requirements may require the presence of a switch which is mechanical or embodied as semiconductor in the battery unit; the above stated advantages of the modulating electronic switch are also obtained in combination with the presence of this switch.
Given the foregoing, the invention also relates to a rechargeable battery, wherein this battery is adapted to be connected to an electrical appliance as according to any of the foregoing claims, wherein the battery is provided with a monitoring circuit, wherein the monitoring circuit is adapted to control the control circuit of the appliance connected to the battery.
In order to prevent the control of the control circuit by the monitoring circuit, a simple preferred embodiment provides the measure that the control circuit is adapted to be deactivated by the monitoring circuit of the battery connected to the appliance.
In this respect another embodiment provides a rechargeable battery with a monitoring circuit adapted to deactivate the control circuit of the appliance connected to the battery.
The monitoring circuit present in the battery unit requires electric energy to be able to function. So as not to discharge the battery prematurely, this monitoring circuit is deactivated according to the prior art when the battery has not been used for a time. This monitoring circuit must however be re-activated when charging or discharging of the battery begins again. In order to make this possible a preferred embodiment of the invention provides the measure that the control circuit is adapted to activate the monitoring circuit of the battery connected to the appliance. It hereby becomes possible for the monitoring circuit to be also activated when the appliance is switched on.
The invention therefore likewise relates to a rechargeable battery of the above stated type wherein the monitoring circuit is adapted to be activated by the control circuit of the appliance connected to the battery.
Another preferred embodiment provides the measure that the control circuit is adapted to deactivate the monitoring circuit of the battery connected to the appliance. When the appliance is switched off, the monitoring circuit associated with the battery is hereby also deactivated.
The invention therefore also relates to a rechargeable battery of the above stated type wherein the monitoring circuit is adapted to be deactivated by the control circuit of the appliance connected to the battery.
In order to reduce the number of contacts between the battery unit and the appliance to be detached from each other, it is recommended that the appliance is adapted to form a single communication connection between the control circuit and the monitoring circuit of a battery connected to the appliance. This connection is then preferably adapted to transmit signals in both directions.
The invention moreover relates to a rechargeable battery of the above stated type wherein the battery is adapted to form a single communication connection between the monitoring circuit and the control circuit of the appliance connected to the battery.
The dual function of this communication connection entails some problems of circuit engineering. At least some of these are resolved when the control circuit is adapted to block activation of the switch element when the communication connection is earthed. Earthing, i.e. connecting the communication connection on the side of the battery unit to the minus terminal of the battery, can be easily implemented in circuit engineering terms by switching, in the conductive mode, a switching semiconductor which is normally in the blocking mode so that it does not normally disrupt the receiving function of the monitoring circuit incorporated in the battery unit.
Although the invention can be applied in numerous appliances, the advantages thereof are most clearly manifest when the appliance is an electric hand tool.
According to the present prior art, only lithium-ion batteries are generally provided with a monitoring circuit. It will be apparent that the invention is also applicable to other batteries which may be developed in the future and which likewise use such a monitoring circuit.
The present invention will be elucidated hereinbelow on the basis of the accompanying figures, in which: Figure 1 shows a circuit diagram of a first embodiment of a combination of an appliance and a battery unit according to the present invention; and Figure 2 shows a circuit diagram of a second embodiment of a combination of an appliance and a battery unit according to the present invention.
Figure 1 shows circuit diagram 1 of an appliance such as for instance an electric hand tool, such as a drill. As the circuit diagram shows, the appliance comprises a switch unit 2 and an electric motor 3. Coupled removably to the appliance is a battery unit 4.
Battery unit 4 comprises a series of battery cells 5, such as lithium-ion cells, and a monitoring circuit 6 for monitoring the charging and discharging processes of battery cells 5. Monitoring circuit 6 is connected for this purpose to each of the cells S.
Switch unit 2 comprises a mechanical switch 7, a semiconductor switch 8 connected in series thereto and a control circuit 9 for controlling semiconductor switch 7. Control circuit 9 is connected for power supply to the positive and negative feed connection.
When, as shown in the drawing, battery unit 4 is connected to appliance 1 by means of contacts 10, 11 and 12, a serial connection is created of battery cells 4, contacts 10, mechanical switch 7, semiconductor switch 8, electric motor 3, contacts 12 and battery cells 4. Up to this point this circuit is in accordance with the prior art
The operation of this circuit is as follows: when battery unit 4 is connected to appliance 1, the user can - assuming that the battery unit is charged - close switch 7 by pressing a trigger (not shown in the drawing), after which, when the trigger is pressed further, the control circuit is controlled such that it gradually opens the semiconductor circuit and current is supplied to motor 3, and electric motor 3 will begin to run and appliance 1 will begin to operate.
The circuit according to the present invention is distinguished from the prior art by providing a connection between monitoring circuit 6 of battery cells S and the control circuit 9. A first function of this connection lies in the control of semiconductor circuit 8 by monitoring circuit 6 when monitoring circuit 6 of the battery cells determines that further discharge of battery cells 5 is not desirable since the lifespan of the cells will hereby be shortened or a dangerous situation may even occur. In the prior art the monitoring circuit 6 opens a switch arranged in series with battery cells 5 in battery unit 4, thereby preventing further discharge of battery cells 5.
In contrast, monitoring circuit 6 - in the embodiment shown in figure 1 - opens semiconductor circuit 8 via control circuit 9, or the semiconductor circuit is controlled such that the discharge is continued at a lower current. This strategy can for instance be followed in situations in which continuation of the discharge does not result in a decrease in the quality of the battery cells or in hazardous situations. The measure can
otherwise be added here that in another situation, for instance when the terminal voltage of battery cells 5 falls further, the discharge current is cut off entirely. This measure can be included in the functionality of monitoring circuit 6 and in that of control circuit 9. This complete interruption can likewise be performed by semiconductor circuit 8, but can likewise be performed by the mechanical switch 7 normally operated by the trigger. This latter mechanical switch does however have to be embodied for this purpose as a relay. It is also possible for that matter for the above described function to be combined with maintaining of the semiconductor switch or relay in the battery as applied according to the prior art. This is particularly the case when semiconductor switch 8 is used to reduce the discharge current.
A connection between the two circuits 6, 9 which extends via a pair of contacts 11 is provided for the purpose of transferring the signals from monitoring circuit 6 to control circuit 9.
This connection can however also be applied for other purposes, such as to control the mode of monitoring circuit 6 by means of control circuit 9. Use is made here of the fact that, in respect of a low energy consumption, it is attractive to leave monitoring circuit 6 as much at rest as possible. Only when control circuit 9 is switched on by the trigger will control circuit 9 generate a signal to monitoring circuit 6 to place it in an active position. The reverse is also possible; when control circuit 9 is switched off, the appliance is switched off so that no more current is drawn from the battery cells and there is no longer any need for monitoring circuit 6 to function. In such situations it is attractive that the control circuit is adapted to generate a relevant signal to the monitoring circuit so that this latter is deactivated.
The output connection of the monitoring circuit is also provided with a transistor 13. The dual use of the connection between monitoring circuit 6 and control circuit 9 can, also in respect of the low voltage levels available, result in problems of circuit engineering which can for instance be solved by providing the monitoring circuit with a controllable semiconductor forming the connection to earth, such as the transistor 13 shown in the figure, which prior to generating a blocking signal to control circuit 9 earths the relevant signal line so that the control circuit blocks operation of semiconductor switch 8 and discharge from battery cells 5 is further blocked.
The structure of the embodiment shown in figure 2 broadly corresponds with that of the embodiment shown in figure 1, except that the connection between control circuit 9 and the positive feed connection 12 is broken. This has the consequence that the operation of the control circuit directly depends on the connection to monitoring circuit 6 of battery unit 4; only when monitoring circuit 6 activates the control circuit can this latter fulfil its function, hi this respect transistor 13 is omitted.
It will be apparent that diverse changes can be made to the shown exemplary embodiments without departing from the invention. The polarity of the circuit can for instance thus be reversed.
Claims
1. Electrical appliance provided with a controllable electric motor and adapted to be powered by a rechargeable battery, comprising: - an electric motor,
- an electronic switch element for controlling the electric power fed to the electric motor;
- a control circuit for the electronic switch element; and
- operating means for the control circuit, - wherein the appliance is adapted for power supply by a battery provided with a monitoring circuit, characterized in that the control circuit is adapted to be controlled by the monitoring circuit of a battery connected to the appliance.
2. Appliance as claimed in claim 1, characterized in that the control circuit is adapted to switch off the electronic switch element under the control of the monitoring circuit of the battery.
3. Appliance as claimed in claim 1 or 2, characterized in that the control circuit is adapted to reduce the power fed to the electric motor by the electronic switch element under the control of the monitoring circuit of the battery.
4. Appliance as claimed in claim 1 or 2, characterized in that the control circuit is adapted to be deactivated by the monitoring circuit of the battery connected to the appliance.
5. Appliance as claimed in any of the foregoing claims, characterized in that the control circuit is adapted to activate the monitoring circuit of the battery connected to the appliance.
6. Appliance as claimed in claim 5, characterized in that the control circuit is adapted to deactivate the monitoring circuit of the battery connected to the appliance.
7. Appliance as claimed in any of the foregoing claims, characterized in that the appliance is adapted to form a single communication connection between the control circuit and the monitoring circuit of a battery connected to the appliance.
8. Appliance as claimed in claim 7, characterized in that the control circuit is adapted to inhibit activation of the switch element when the communication connection is earthed.
9. Appliance as claimed in any of the foregoing claims, characterized in that the appliance is an electric hand tool.
10. Rechargeable battery, wherein this battery is adapted to be connected to an electrical appliance as claimed in any of the foregoing claims, wherein the battery is provided with a monitoring circuit, characterized in that the monitoring circuit is adapted to control the control circuit of the appliance connected to the battery.
11. Rechargeable battery as claimed in claim 10, characterized in that the monitoring circuit is adapted to deactivate the control circuit of the appliance connected to the battery.
12. Rechargeable battery as claimed in claim 10 or 11 , characterized in that the monitoring circuit is adapted to be activated by the control circuit of the appliance connected to the battery.
13. Rechargeable battery as claimed in claim 12, characterized in that the monitoring circuit is adapted to be deactivated by the control circuit of the appliance connected to the battery.
14. Rechargeable battery as claimed in any of the claims 10-13, characterized in that the battery is adapted to form a single communication connection between the monitoring circuit and the control circuit of an appliance connected to the battery.
15. Rechargeable battery as claimed in any of the claims 10-14, characterized in that the battery is a lithium-ion battery.
16. Combination of an appliance as claimed in any of the claims 1 -9 and a rechargeable battery as claimed in any of the claims 10-15.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL2000917A NL2000917C2 (en) | 2007-10-10 | 2007-10-10 | Power tools with battery-controlled protection. |
| NL2000917 | 2007-10-10 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| WO2009048331A2 true WO2009048331A2 (en) | 2009-04-16 |
| WO2009048331A3 WO2009048331A3 (en) | 2009-07-02 |
Family
ID=39226806
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/NL2008/050644 WO2009048331A2 (en) | 2007-10-10 | 2008-10-09 | Electric tool with protection controlled by battery monitoring |
Country Status (2)
| Country | Link |
|---|---|
| NL (1) | NL2000917C2 (en) |
| WO (1) | WO2009048331A2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115267572A (en) * | 2022-09-26 | 2022-11-01 | 卧安科技(深圳)有限公司 | Switch control device and non-rechargeable battery detection method and device of intelligent equipment |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1251618A2 (en) * | 2001-04-17 | 2002-10-23 | Makita Corporation | Apparatus and methods for determining appropriate timing for recharching recharcheable batteries |
| JP2005218174A (en) * | 2004-01-27 | 2005-08-11 | Makita Corp | Battery pack monitor and battery pack |
| EP1571458A1 (en) * | 2004-03-05 | 2005-09-07 | Hitachi Koki Co., Ltd. | Battery-powered tool capable of detecting discharged battery pack |
| EP1788687A1 (en) * | 2005-11-17 | 2007-05-23 | Matsushita Electric Works, Ltd. | Rechargeable battery pack for a power tool |
-
2007
- 2007-10-10 NL NL2000917A patent/NL2000917C2/en not_active IP Right Cessation
-
2008
- 2008-10-09 WO PCT/NL2008/050644 patent/WO2009048331A2/en active Application Filing
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1251618A2 (en) * | 2001-04-17 | 2002-10-23 | Makita Corporation | Apparatus and methods for determining appropriate timing for recharching recharcheable batteries |
| JP2005218174A (en) * | 2004-01-27 | 2005-08-11 | Makita Corp | Battery pack monitor and battery pack |
| EP1571458A1 (en) * | 2004-03-05 | 2005-09-07 | Hitachi Koki Co., Ltd. | Battery-powered tool capable of detecting discharged battery pack |
| EP1788687A1 (en) * | 2005-11-17 | 2007-05-23 | Matsushita Electric Works, Ltd. | Rechargeable battery pack for a power tool |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115267572A (en) * | 2022-09-26 | 2022-11-01 | 卧安科技(深圳)有限公司 | Switch control device and non-rechargeable battery detection method and device of intelligent equipment |
| CN115267572B (en) * | 2022-09-26 | 2022-12-13 | 卧安科技(深圳)有限公司 | Switch control device and non-rechargeable battery detection method and device of intelligent equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| NL2000917C2 (en) | 2009-04-14 |
| WO2009048331A3 (en) | 2009-07-02 |
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Legal Events
| Date | Code | Title | Description |
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