CN115799668A - Battery pack for cordless power tool - Google Patents
Battery pack for cordless power tool Download PDFInfo
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- CN115799668A CN115799668A CN202210686171.9A CN202210686171A CN115799668A CN 115799668 A CN115799668 A CN 115799668A CN 202210686171 A CN202210686171 A CN 202210686171A CN 115799668 A CN115799668 A CN 115799668A
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- battery
- charging
- power tool
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- 238000007599 discharging Methods 0.000 claims abstract description 49
- 230000002457 bidirectional effect Effects 0.000 claims description 19
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 9
- 238000001514 detection method Methods 0.000 claims description 9
- 229910052744 lithium Inorganic materials 0.000 claims description 9
- 108700025151 PD protocol Proteins 0.000 claims description 4
- 238000000034 method Methods 0.000 claims 4
- 238000010586 diagram Methods 0.000 description 11
- 230000009286 beneficial effect Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000000428 dust Substances 0.000 description 3
- 244000025254 Cannabis sativa Species 0.000 description 1
- 230000003044 adaptive effect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
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Abstract
The present invention relates to a battery pack for a cordless power tool, comprising: a housing; a battery or a battery pack accommodated in the case; a control circuit electrically connected to the battery or battery pack; the circuit of the discharging end is connected with the control circuit and is suitable for being used by the electric tool; it also includes a charging terminal electrically connected to the control circuit and configured to be mechanically connected to the housing and adapted to be directly connected to an external AC power source for recharging the battery or batteries. According to the technical scheme, the charging end capable of being directly connected with the external AC power supply is directly configured on the battery pack for the cordless electric tool, and when the battery pack is exhausted and needs to be charged, the battery pack is directly connected with the external AC power supply through the charging end so as to recharge the battery or the battery pack without configuring a special charger.
Description
Technical Field
The invention relates to a battery pack, in particular to a battery pack for a cordless electric tool.
Background
The electric tools comprise cordless handheld electric tools (such as electric drills, screwdrivers and the like), garden tools (such as lawn trimmers, grass trimmers, hedge trimmers, electric saws, hair dryers and the like), cordless dust collectors, power operation equipment which adopts lithium batteries as power sources, direct-current air compressors and the like.
A battery pack conventionally adapted to be employed in a power tool generally includes a plurality of unit batteries connected to each other to supply power therefrom, the unit batteries being generally disposed in a housing, and the housing being provided with a discharge interface allowing the battery pack to be electrically connected to the power tool to supply power thereto, and the housing being further provided with an interface allowing the battery pack to be electrically connected to a charger to allow the battery in the battery pack to be recharged, the interface being generally common to the above-mentioned discharge interface, requiring a dedicated charger to be provided for charging thereof, specifically referred to by the names: the utility model provides a novel battery package charging device that radiating effect is good, application number: CN201921524151.1, application date: 2019-09-14.
Disclosure of Invention
The invention aims to provide a battery pack for a cordless electric tool without a special charger.
The invention provides a battery pack for a cordless electric tool, which comprises:
a housing;
a battery or a battery pack accommodated in the case;
a control circuit electrically connected to the battery or battery pack;
the circuit of the discharging end is connected with the control circuit and is suitable for being used by the electric tool;
it also includes a charging terminal electrically connected to the control circuit and configured to be mechanically connected to the housing and adapted to be directly connected to an external AC power source for recharging the battery or batteries.
Preferably, the control circuit comprises a rectified step-down module arranged inside the housing and connected to the charging terminal, configured to convert an external AC current into a DC current adapted to recharge the battery or battery pack.
Preferably, the control circuit further comprises a lithium battery management module disposed inside the housing and connected to the discharge end, and configured to monitor at least the voltage of the battery or battery pack.
Preferably, the lithium battery management module comprises a management chip electrically connected to the battery or the battery pack, and an MCU master controller connected to the management chip, and the MCU master controller is connected to the rectifying and voltage-dropping module.
Preferably, when the charging terminal is connected to the AC power supply, the MCU master is triggered to wake up by generating a high level signal.
Preferably, the rectified step down module further comprises a voltage detection circuit adapted to detect the presence of AC power access during AC charging and, if present, to activate a charging circuit for recharging the battery or battery pack.
Preferably, the rectification voltage-reduction module further includes a voltage detection circuit, and when the voltage detection circuit detects that the input voltage after rectification voltage-reduction is higher than a preset threshold, the charging circuit is turned off, and charging is stopped.
Preferably, the device further comprises a first circuit board and a second circuit board which are arranged in the shell and electrically connected with each other;
the first circuit board is connected with the charging terminal and is configured to convert an external AC current into a DC current suitable for recharging the battery or the battery pack;
the second circuit board is connected with the positive electrode and the negative electrode of the battery or the battery pack and at least configured to monitor the voltage of the battery or the battery pack.
Preferably, the charging end is adjacent to the discharging end, the first circuit board and the second circuit board are at least partially arranged in a stacking interval, and an insulating board is arranged in the stacking interval region.
Preferably, the second circuit board partially covers the battery or the battery pack, and the other part extends and protrudes out of the battery or the battery pack and is arranged at a lamination interval with the second circuit board.
Preferably, the discharge end includes a tool interface connected to the second circuit board, and the tool interface is disposed between the insulating plate and the second circuit board.
Preferably, the charging terminal is far away from the discharging terminal, and the first circuit board and the second circuit board are not laminated.
Preferably, the system further comprises a USB interface, wherein the USB interface is electrically connected with the control circuit and is suitable for the power utilization of the 3C electronic product.
Preferably, the control circuit further comprises a PD module disposed inside the housing and sharing a circuit board with the discharge end, and the PD module has a PD protocol and a buck-boost integrated chip.
Compared with the prior art, the invention has the beneficial technical effects that:
when the battery pack is exhausted and needs to be charged, the battery pack is directly connected with the external AC power supply through the charging terminal so as to recharge the battery or the battery pack without a specially-arranged charger.
Another object of the present invention is to provide a battery pack for a cordless power tool, which can be directly connected to an external AC power source for charging and can be conveniently matched with the power tool.
The invention provides a battery pack for a cordless electric tool, which comprises:
a housing;
a battery or a battery pack accommodated in the case;
a discharge end adapted to power an electric tool;
at least one connector disposed on a surface of the housing adapted to be in latching connection with the power tool;
the charging terminal is configured to be mechanically connected to the shell and has a first state of being accommodated in the shell and a second state of being protruded out of the shell;
during discharging, the battery pack for the cordless power tool is connected to the power tool by the connector latch, the charging terminal being in a first state;
during charging, the battery pack for the cordless power tool is separated from the power tool, and the charging terminal is in the second state and can be directly connected with an external AC power supply to recharge the battery or the battery pack.
Preferably, the charging terminal and the connector are on different surfaces of the housing.
Preferably, the charging terminal is at least partially covered by the power tool during the discharging.
Preferably, the charging terminal and the discharging terminal are on different surfaces of the housing.
Preferably, the discharge terminal adapted to supply power to the electric power tool inhibits discharge during the charging.
Compared with the prior art, the invention has the beneficial technical effects that:
on one hand, a charging terminal capable of being directly connected with an external AC power supply is directly arranged on a battery pack for the cordless electric tool, and when the battery pack is exhausted and needs to be charged, the charging terminal is directly connected with the external AC power supply so as to recharge the battery or the battery pack without arranging a special charger;
on the other hand, the charging terminal has a first state of being accommodated in the shell and a second state of being protruded out of the shell; during discharging, a battery pack for the cordless power tool is connected to the power tool by a connector latch, and a charging terminal is accommodated in the housing and is in a first state; only when charging is needed, the battery pack for the cordless electric tool is separated from the electric tool, the charging end protrudes out of the shell and is in the second state, and the battery pack can be directly connected with an external AC power supply to recharge the battery or the battery pack, so that the battery pack can be conveniently matched with the electric tool.
The invention further aims to provide a battery pack for a cordless electric tool, which can meet the power consumption of the electric tool and the power consumption of a 3C electronic product and is provided with a charging end.
The invention provides a battery pack for a cordless electric tool, which comprises:
a housing;
a battery or a battery pack accommodated in the case;
a control circuit electrically connected to the battery or battery pack;
the circuit of the discharging end is connected with the control circuit and is suitable for being used by the electric tool;
the USB interface is connected with the control circuit in a circuit manner and is suitable for the power consumption of the 3C electronic product;
it also includes a charging terminal electrically connected to the control circuit, configured to be mechanically connected to the housing, and adapted to be directly connected to an external AC power source for recharging the battery or battery pack;
the battery pack for the cordless electric tool is at least provided with one of the following using states:
a first state in which the battery pack for the cordless power tool is connected to the power tool and power is supplied to the power tool through the discharge end;
the battery pack for the cordless electric tool is connected to the 3C electronic product and supplies power to the 3C electronic product through the USB interface;
a third state in which the battery pack for the cordless power tool is connected to the external AC power source for recharging the battery or battery pack through the charging terminal;
and in a fourth state, the battery pack for the cordless electric tool is connected to the external AC power supply, and the battery or the battery pack is recharged through the charging terminal, and meanwhile, the 3C electronic product is powered through the USB interface.
Preferably, the USB interface and the charging terminal are on a different surface of the housing.
Compared with the prior art, the invention has the beneficial technical effects that:
on one hand, the power consumption of the electric tool can be met, and the power consumption of a 3C electronic product can also be met;
on the other hand, a charging terminal capable of being directly connected with an external AC power supply is directly arranged on the battery pack for the cordless electric tool, and when the battery pack is exhausted and needs to be charged, the charging terminal is directly connected with the external AC power supply through the charging terminal so as to recharge the battery or the battery pack without arranging a special charger.
It is still another object of the present invention to provide a battery pack for a cordless power tool having a plurality of different charging modes.
The invention provides a battery pack for a cordless electric tool, which comprises:
a housing;
a battery or a battery pack accommodated in the case;
a control circuit electrically connected to the battery or battery pack;
the circuit of the discharging end is connected with the control circuit and is suitable for being used by the electric tool;
the bidirectional charging and discharging interface is connected with the control circuit in a circuit manner and is suitable for being used by a 3C electronic product or being connected with an external power supply to recharge the battery or the battery pack;
it also includes a charging terminal electrically connected to the control circuit, configured to be mechanically connected to the housing, and adapted to be directly connected to an external AC power source for recharging the battery or battery pack;
the battery pack for the cordless power tool is provided with at least one of the following charging states:
the battery pack for the cordless electric tool is connected to the external power supply and used for recharging the battery or the battery pack through the bidirectional charging and discharging interface;
and a second state in which the battery pack for the cordless power tool is connected to the AC power source and the battery or battery pack is recharged through the charging terminal.
Preferably, the bi-directional charging and discharging interface and the charging terminal inhibit simultaneous recharging of the battery or battery pack.
Preferably, the bidirectional charging and discharging interface and the charging terminal have different charging powers, and when the two terminals are connected with a power supply at the same time, the battery or the battery pack is preferably recharged by using the terminal with the higher charging power.
Preferably, when the one with larger charging power is disconnected for recharging the battery or the battery pack, the other one is automatically started to continue recharging the battery or the battery pack.
Preferably, the bidirectional charging and discharging interface and the charging terminal have the same charging specification and charging power, and both can be used for recharging the battery or the battery pack at the same time.
Compared with the prior art, the invention has the beneficial effects that:
on one hand, a charging terminal capable of being directly connected with an external AC power supply is directly arranged on a battery pack for the cordless electric tool, and when the battery pack is exhausted and needs to be charged, the charging terminal is directly connected with the external AC power supply so as to recharge the battery or the battery pack without arranging a special charger;
on the other hand, the battery or the battery pack can be recharged through the bidirectional charging and discharging interface, for example, the bidirectional type-c interface is adopted to be matched with the data line to be connected with an external power supply so as to recharge the battery or the battery pack.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic block diagram of the circuit principle of an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of an embodiment of the present invention;
FIG. 3 is a schematic diagram of an internal circuit board layout according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of another layout of an internal circuit board according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of a charging period according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of a 3C electronic product simultaneously charging during a charging period according to an embodiment of the present invention;
FIG. 7 is a schematic diagram of the charging status of the AC wall plug with the charging terminal according to the embodiment of the present invention;
FIG. 8 is a schematic diagram of an AC wall plug charging state connected via a bi-directional charging/discharging interface according to an embodiment of the present invention;
fig. 9 is a schematic diagram illustrating a charging state of a DC power source connected via a bidirectional charging and discharging interface according to an embodiment of the present invention;
fig. 10 is a schematic diagram illustrating a state of charge at the same time through a bidirectional charge-discharge interface and a charging terminal according to an embodiment of the present invention.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is to be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 and 2, a battery pack 100 for a cordless power tool includes:
a housing 10;
a battery or a battery pack 20 accommodated in the case 10;
a control circuit electrically connected to the battery or battery pack 20;
a discharge end 30 electrically connected to the control circuit and adapted to be used by the power tool;
it also includes a charging terminal 40 electrically connected to the control circuit and configured to be mechanically connected to the housing 10 and adapted to be directly connected to an external AC power source for recharging the battery or batteries 20.
The battery pack has at least two batteries connected to each other to supply power therefrom.
The following are specifically mentioned: the electric tool is not limited to the cordless handheld electric tool, and also comprises power operation equipment using a secondary battery as a power source, such as a garden tool, a cordless dust collector, a direct current air compressor and the like.
Further, as shown in fig. 1, the control circuit includes a rectifying and voltage-reducing module 200 disposed inside the housing 10 and connected to the charging terminal 40, and configured to convert the external AC current into a DC current adapted to be recharged by the battery or battery pack 20.
The BMS protection board is only arranged in the battery pack for the traditional adaptive electric tool, and the rectifying and voltage-reducing module 200 is independently arranged in a special charger, namely, a user needs to buy a matched charger when buying the battery pack.
In addition, the control circuit further includes a lithium battery management module 300 disposed inside the housing 10 and connected to the discharge end 30, and configured to monitor at least a voltage of the battery or the battery pack 20.
The lithium battery management module 300 is commonly used in a tool battery pack application, and generally has protection functions such as overcurrent, short circuit, overdischarge, overcharge, output overvoltage, high and low temperature charge and discharge, signal interference, and the like.
More specifically, the lithium battery management module 300 includes a management chip 300a electrically connected to the battery or the battery pack 20, and an MCU master 300b connected to the management chip 300a, wherein the MCU master 300b is connected to the rectifying and voltage-dropping module 200.
In order to reduce power consumption, the MCU master 300b has a sleep function, and when the charging terminal 40 is connected to the AC power, it is adapted to generate a high level signal to trigger the MCU master 300b to wake up, and the MCU master 300b starts to operate.
In addition, the rectified step down module 200 also includes a voltage detection circuit adapted to detect the presence of AC power access during AC charging, and if so, to activate the charging circuit to recharge the battery or battery pack.
In addition, the rectification step-down module 200 may further include another voltage detection circuit, and when the another voltage detection circuit detects that the input voltage after rectification step-down is higher than the preset threshold, the charging circuit is turned off to stop charging, so that the charging protection function is provided.
With continued reference to fig. 2 and fig. 3, the battery pack 100 for the cordless power tool further includes a first circuit board 50 and a second circuit board 60 disposed in the housing 10 and electrically connected to each other;
a first circuit board 50 connected to the charging terminal 40 and configured to convert an external AC current into a DC current for recharging the adapter battery or battery pack 20; the second circuit board 60 is connected to the positive and negative poles of the battery or battery pack 20, and is configured to monitor at least the voltage of the battery or battery pack 20.
Specifically, the rectifying and voltage-reducing module 200 is disposed on the first circuit board 50, and the lithium battery management module 300 including the management chip 300a and the MCU master 300b is disposed on the second circuit board 60.
The MCU master 300b is connected to the rectifying and dropping module 200, so that an electrical connection is required between the first circuit board 50 and the second circuit board 60, wherein the electrical connection may be a wire connection, and preferably a bridge board 500, as shown in fig. 3, and the bridge board 500 performs an electrical connection between the first circuit board 50 and the second circuit board 60 on the one hand, and also performs a mechanical supporting function between the two on the other hand.
With continued reference to fig. 3, the charging terminal 40 is adjacent to the discharging terminal 30, and the first circuit board 50 and the second circuit board 60 are at least partially stacked and spaced apart, and due to the limited stacking distance, in order to avoid the high voltage region of the first circuit board 50 from interfering with the low voltage discharge of the second circuit board 60, the stacked and spaced apart region is provided with an insulating plate 70.
Specifically, the second circuit board 60 partially covers the battery or the battery pack 20, as shown by 60b in fig. 2, and partially extends to protrude from the battery or the battery pack 20 and is stacked and spaced apart from the second circuit board 50, as shown by 60a in fig. 2.
With continued reference to fig. 3, the discharge end 30 includes a tool interface 30a connected to the second circuit board 60, the tool interface 30a being disposed between the insulating plate 70 and the second circuit board 60.
Specifically, the tool interface 30a includes at least positive and negative discharge terminals adapted to mate with corresponding terminals of an interface of a power tool, such as a male blade and female socket design or a male pin and female socket design.
Referring to another circuit board layout shown in fig. 4, the charging terminal 40 is far from the discharging terminal 30, and the first circuit board 50 and the second circuit board 60 are not stacked, which can avoid interference between the AC high voltage and the discharging low voltage.
Further, the battery pack 100 for the cordless power tool further includes a USB interface 80 electrically connected to the control circuit, adapted for the use of 3C electronic products, preferably using a type-C interface.
The control circuit further includes a PD module 400 disposed inside the housing 10 and sharing a circuit board with the discharge end 30, and the PD module 400 has a PD protocol and a buck-boost integrated chip 400a, as shown in fig. 1.
In summary, the battery pack 100 for the cordless power tool is directly provided with a charging terminal capable of being directly connected to an external AC power source, and when the battery pack 100 runs out of power and needs to be charged, the battery pack is directly connected to the external AC power source through the charging terminal, so that the battery or the battery pack can be recharged without a dedicated charger.
In addition, the application also relates to a battery pack for the cordless electric tool, which can be directly connected with an external AC power supply for charging and can be conveniently matched with the electric tool.
Specifically, the battery pack 100 for the cordless power tool includes:
a housing 10;
a battery or a battery pack 20 accommodated in the case 10;
a discharge end 30 adapted to supply power to the power tool;
at least one connector 90 disposed on a surface of the housing 10 adapted for latching connection with the power tool;
it further comprises a charging terminal 40 configured to be mechanically connected to the housing 10 and having a first state (shown in fig. 2) received in the housing 10 and a second state (shown in fig. 5) protruding from the housing 10;
during discharge, the battery 100 pack for the cordless power tool is latched to the power tool by the connector 90, with the charging terminal 40 in a first state (shown in fig. 2);
during charging, the battery pack 100 for the cordless power tool is detached from the power tool, and the charging terminal 40 is in the second state (as shown in fig. 5) and can be directly connected to an external AC power source for recharging the battery or battery pack 20.
On one hand, a charging terminal capable of being directly connected with an external AC power supply is directly arranged on a battery pack for the cordless electric tool, and when the battery pack is exhausted and needs to be charged, the charging terminal is directly connected with the external AC power supply so as to recharge the battery or the battery pack without arranging a special charger;
on the other hand, the charging terminal has a first state of being accommodated in the shell and a second state of being protruded out of the shell; during discharging, a battery pack for the cordless power tool is connected to the power tool by a connector latch, and a charging terminal is accommodated in the housing and is in a first state; only when charging is needed, the battery pack for the cordless electric tool is separated from the electric tool, the charging end protrudes out of the shell and is in the second state, and the battery pack can be directly connected with an external AC power supply to recharge the battery or the battery pack, so that the battery pack can be conveniently matched with the electric tool.
In addition, in order to avoid the interference between the charging terminal 40 and the connecting member 90 during discharging, preferably, the charging terminal 40 and the connecting member 90 are located on different surfaces of the housing 10, specifically, as shown in fig. 2, the connecting member 90 is disposed on a main surface with a larger area of the battery pack 100, the charging terminal 40 is disposed on a side surface adjacent to the connecting member, the power tool is configured with a latch adapted to the connecting member 90, when the battery pack 100 is inserted into the power tool, the battery pack 100 is latched and fixed with the power tool through the latch matching of the latch and the connecting member 90, and at this time, the charging terminal 40 is configured on the side surface adjacent to the connecting member 90, so as to avoid the interference between the two.
Further, during discharging, the charging terminal 40 is at least partially covered by the electric tool, on the one hand, the charging terminal 40 can be prevented from being operated during discharging, and on the other hand, impurities, dust, and the like can be effectively prevented from entering the charging terminal 40.
Further, the charging terminal 40 and the discharging terminal 30 are located on different surfaces of the housing 10, so as to facilitate the user to use the battery pack 100, the battery pack 100 is preferably matched with the power tool along the length direction of the battery pack 100, when the discharging terminal 30 is located on a surface opposite to the power tool, as shown in fig. 2, and during charging, the charging terminal 40 needs to be inserted into the AC power source, and it is necessary to avoid a large moment arm of the charging terminal 40 during charging when the AC power source is inserted into the charging terminal, therefore, at this time, the charging terminal 40 is not suitable to be located on a surface opposite to the power tool, that is, the charging terminal 40 is not suitable to be located on the same surface as the discharging terminal 30, preferably, on the side adjacent thereto, including the main surface and the side shown in fig. 2.
Further, in order to secure the safety of the power consumption of the battery pack 100, the discharging terminal 30 adapted to supply power to the electric power tool inhibits discharging during charging.
It should be noted that the connecting member 90 preferably has a latch slot structure, the electric tool has a latch cooperating with the electric tool, and the electric tool is provided with an unlocking mechanism, when the battery pack is used in cooperation with the electric tool, the latch is locked into the latch slot, and the battery pack and the latch slot are fixedly connected, and when the battery pack is detached, the latch is separated from the latch slot by operating the unlocking mechanism, and the latch slot can be detached and separated.
Besides, the application also relates to a battery pack which can meet the power consumption of the electric tool and the power consumption of a 3C electronic product and is provided with a charging end and used for the cordless electric tool.
Referring specifically to fig. 6, a battery pack 100 for a cordless power tool includes:
a housing 10;
a battery or a battery pack 20 accommodated in the case 10;
a control circuit electrically connected to the battery or battery pack 20;
a discharge end 30 electrically connected to the control circuit and adapted to be used by the power tool;
the USB interface 80 is electrically connected with the control circuit and is suitable for the power consumption of the 3C electronic product;
it also comprises a charging terminal 40 electrically connected to the control circuit, configured to be mechanically connected to the casing 10, suitable for being directly connected to an external AC power source for recharging the battery or batteries 20;
the battery pack 100 for the cordless power tool has at least one of the following states of use:
a first state in which the battery pack 100 for the cordless power tool is connected to the power tool and the power for the power tool is supplied through the discharge terminal 30;
in the second state, the battery pack 100 for the cordless power tool is connected to the 3C electronic product, and the 3C electronic product is powered through the USB interface 80;
a third state in which the battery pack 100 for the cordless power tool is connected to an external AC power source and the battery or battery pack 20 is recharged through the charging terminal 40;
in the fourth state, the battery pack 100 for the cordless power tool is connected to an external AC power source, and the battery or battery pack 20 is recharged through the charging terminal 40, and the 3C electronic product is also powered through the USB interface 80.
On one hand, the power consumption of the electric tool can be met, and the power consumption of a 3C electronic product can also be met;
on the other hand, a charging terminal capable of being directly connected with an external AC power supply is directly arranged on the battery pack for the cordless electric tool, and when the battery pack is exhausted and needs to be charged, the charging terminal is directly connected with the external AC power supply through the charging terminal so as to recharge the battery or the battery pack without arranging a special charger.
Preferably, the USB interface 80 is prevented from being covered by a cover during charging, and the USB interface 80 and the charging terminal 40 are located on the same surface of the housing 10.
In addition, as mentioned above, the USB interface 80 preferably adopts a type-c interface, the control circuit includes a PD module 400 disposed inside the housing 10 and sharing a circuit board with the discharging end 30, and the PD module 400 has a PD protocol and a buck-boost integrated chip 400a, as shown in fig. 1.
In addition, the application also relates to a battery pack for the cordless electric tool, which has a plurality of different charging modes.
Referring to fig. 7 to 9, a battery pack 100 for a cordless power tool includes:
a housing 10;
a battery or a battery pack 20 accommodated in the case 10;
a control circuit electrically connected to the battery or battery pack 20;
a discharge end 30 electrically connected to the control circuit and adapted to be used by the power tool;
the bidirectional charging and discharging interface 80' is electrically connected with the control circuit and is suitable for the 3C electronic product to use electricity or be connected with an external power supply to recharge a battery or a battery pack;
it also comprises a charging terminal 40 electrically connected to said control circuit, configured to be mechanically connected to the casing 10, suitable for being directly connected to an external AC power source for recharging the battery or batteries 20;
the battery pack 100 for the cordless power tool has at least one of the following states of charge:
in a first state, the battery pack 100 for the cordless power tool is connected to an external power source, and the battery or the battery pack 20 is recharged through the bidirectional charging and discharging interface 80', as shown in fig. 8 and 9, specifically, referring to fig. 8, the bidirectional charging and discharging interface 80' is plugged into a wall plug AC power source for charging through a data line in cooperation with a charging head, and referring to fig. 9, the bidirectional charging and discharging interface 80' is connected to a DC power source for charging through a data line in cooperation with the charging head;
in a second state, the battery pack 100 for the cordless power tool is connected to an AC power source for recharging the battery or battery pack 20 via the charging terminal 40, as shown in fig. 7.
According to the technical scheme, on one hand, a charging end capable of being directly connected with an external AC power supply is directly configured on a battery pack for the cordless electric tool, and when the electric quantity of the battery pack is exhausted and needs to be charged, the battery pack is directly connected with the external AC power supply through the charging end so as to recharge the battery or the battery pack without configuring a special charger;
on the other hand, the battery or the battery pack can be recharged through the bidirectional charging and discharging interface, for example, the bidirectional type-c interface is matched with the data line to be connected with an external power supply to be recharged by the battery or the battery pack.
Specifically, the bi-directional charging and discharging interface 80' and the charging terminal 40 inhibit simultaneous recharging of the battery or batteries 20.
Further, the bi-directional charging and discharging interface 80' and the charging terminal 40 have different charging powers, and when both are connected to the power source, the charging power is preferably larger for recharging the battery or the battery pack 20.
For example, when the bidirectional charging/discharging interface 80 'charges 45W and the charging terminal 40 charges 20W, and both are connected to the power source, the 45W bidirectional charging/discharging interface 80' with higher charging power is preferably used to recharge the battery or the battery pack 20, and the charging terminal 40 is still prohibited from being plugged in the AC power source and is not allowed to recharge the battery or the battery pack 20.
In addition, when the charging power of the battery or the battery pack 20 is cut off, the other battery or the battery pack 20 is automatically turned on to be recharged.
For example, the charging circuit of the 45W bidirectional charging/discharging interface 80' with a large charging power may be automatically turned on to continue recharging the battery or the battery pack 20 due to some reason, such as the power consumption of the DC power supply is over or the charging is disconnected due to the disconnection of the AC power supply.
In addition, referring to fig. 10, the bi-directional charging/discharging interface 80' and the charging terminal 40 have the same charging specification and charging power, such as the same charging voltage and charging current, and both can be used to recharge the battery or the battery pack at the same time, so that the charging power can be increased and the charging time can be reduced.
Finally, it should be noted that: while the present invention has been described in the context of functional modules and illustrated in the form of block diagrams, it should be understood that, unless otherwise indicated to the contrary, one or more of the described functions and/or features may be integrated within a single physical device and/or software module or one or more functions and/or features may be implemented in separate physical devices or software modules. It will also be appreciated that a detailed discussion of the actual implementation of each module is not necessary for an understanding of the present invention. Rather, the actual implementation of the various functional modules in the system disclosed herein will be understood within the ordinary skill of an engineer, given the nature, function, and inter-relationships of the modules. Accordingly, those of ordinary skill in the art will be able to practice the invention as set forth in the claims without undue experimentation. It is also to be understood that the specific concepts disclosed are merely illustrative of and not intended to limit the scope of the invention, which is defined by the appended claims and their full scope of equivalents.
Claims (26)
1. A battery pack for a cordless power tool, comprising:
a housing;
a battery or a battery pack accommodated in the case;
a control circuit electrically connected to the battery or battery pack;
the circuit of the discharge end is connected with the control circuit and is suitable for being used by the electric tool;
the method is characterized in that: the charging terminal is configured to be mechanically connected to the housing and adapted to be directly connected to an external AC power source for recharging the battery or battery pack.
2. The battery pack for a cordless power tool of claim 1, wherein the control circuit comprises a rectified step down module disposed inside the housing in connection with the charging terminal, configured to convert an external AC current into a DC current adapted to recharge the battery or battery pack.
3. The battery pack for a cordless power tool of claim 2, wherein the control circuitry further comprises a lithium battery management module disposed within the housing and connected to the discharge end, at least configured to monitor the voltage of the battery or battery pack.
4. The battery pack for the cordless power tool according to claim 3, wherein the lithium battery management module comprises a management chip electrically connected to the battery or the battery pack, and an MCU master connected with the management chip, and the MCU master is connected with the rectification step-down module.
5. The battery pack of claim 4, wherein the charging terminal is adapted to generate a high signal to trigger the MCU master to wake up when the AC power source is connected to the charging terminal.
6. The battery pack for a cordless power tool of claim 4, wherein the rectified step down module further comprises a voltage detection circuit adapted to detect the presence of AC power access during AC charging and, if present, to activate a charging circuit for recharging the battery or battery pack.
7. The battery pack for the cordless power tool according to claim 4 or 6, wherein the rectified step-down module further comprises a voltage detection circuit, and the voltage detection circuit detects that the rectified and stepped-down input voltage is higher than a preset threshold value, and then turns off the charging circuit to stop charging.
8. The battery pack for a cordless power tool according to claim 1, further comprising a first circuit board and a second circuit board built in the case and electrically connected to each other;
the first circuit board is connected with the charging terminal and is configured to convert an external AC current into a DC current adapted to recharge the battery or the battery pack;
the second circuit board is connected with the positive electrode and the negative electrode of the battery or the battery pack and at least configured to monitor the voltage of the battery or the battery pack.
9. The battery pack for a cordless power tool according to claim 8, wherein the charging terminal is adjacent to the discharging terminal, and the first circuit board and the second circuit board are at least partially arranged in a stacked space, and an insulating plate is provided in a stacked space region.
10. The battery pack for the cordless power tool according to claim 9, wherein: the second circuit board partially covers the battery or the battery pack, and the other part extends out of the battery or the battery pack and is arranged with the second circuit board in a stacking and spacing mode.
11. The battery pack for a cordless power tool according to claim 9 or 10, wherein the discharge terminal includes a tool interface connected to the second circuit board, the tool interface being disposed between the insulating plate and the second circuit board.
12. The battery pack for a cordless power tool according to claim 8, wherein the charging terminal is remote from the discharging terminal, and the first circuit board and the second circuit board are not stacked.
13. The battery pack for a cordless power tool according to claim 1, further comprising a USB interface electrically connected to the control circuit and adapted for use with 3C electronic products.
14. The battery pack for a cordless power tool of claim 13, wherein the control circuit further comprises a PD module disposed inside the housing and sharing a circuit board with the discharge end, the PD module having a PD protocol and a buck-boost integrated chip.
15. A battery pack for a cordless power tool, comprising:
a housing;
a battery or a battery pack accommodated in the case;
a discharge end adapted to power an electric tool;
at least one connector disposed on a surface of the housing adapted to be in latching connection with the power tool;
the method is characterized in that: the charging terminal is configured to be mechanically connected with the shell and has a first state of being accommodated in the shell and a second state of being protruded out of the shell;
during discharging, the battery pack for the cordless power tool is connected to the power tool by the connector latch, the charging terminal being in a first state;
during charging, the battery pack for the cordless power tool is separated from the power tool, and the charging terminal is in a second state and can be directly connected with an external AC power source to recharge the battery or the battery pack.
16. The battery pack for a cordless power tool according to claim 15, wherein the charging terminal and the connector are on a non-same surface of the housing.
17. The battery pack for a cordless power tool according to claim 15, wherein the charging terminal is at least partially covered by the power tool during the discharging.
18. The battery pack for a cordless power tool according to claim 15, wherein the charging terminal and the discharging terminal are on a non-same surface of the housing.
19. The battery pack for a cordless power tool according to claim 15, wherein the discharge terminal adapted to supply power to the power tool inhibits discharge during the charging.
20. A battery pack for a cordless power tool, comprising:
a housing;
a battery or a battery pack accommodated in the case;
a control circuit electrically connected to the battery or battery pack;
the circuit of the discharge end is connected with the control circuit and is suitable for being used by the electric tool;
the USB interface is connected with the control circuit in a circuit manner and is suitable for the power consumption of the 3C electronic product;
the method is characterized in that: the charging terminal is connected with the control circuit, is configured to be mechanically connected with the shell, and is suitable for being directly connected with an external AC power supply to recharge the battery or the battery pack;
the battery pack for the cordless electric tool is provided with at least one of the following use states:
a first state in which the battery pack for the cordless power tool is connected to the power tool and the power tool is powered through the discharge terminal;
the battery pack for the cordless electric tool is connected to the 3C electronic product and supplies power to the 3C electronic product through the USB interface;
a third state in which the battery pack for the cordless power tool is connected to the external AC power source, and the battery or battery pack is recharged through the charging terminal;
and in a fourth state, the battery pack for the cordless electric tool is connected to the external AC power supply, and the battery or the battery pack is recharged through the charging terminal, and meanwhile, the 3C electronic product is powered through the USB interface.
21. The battery pack for a cordless power tool of claim 20, wherein the USB interface and the charging port are on a non-same surface of the housing.
22. A battery pack for a cordless power tool, comprising:
a housing;
a battery or a battery pack accommodated in the case;
a control circuit electrically connected to the battery or battery pack;
the circuit of the discharge end is connected with the control circuit and is suitable for being used by the electric tool;
the bidirectional charging and discharging interface is electrically connected with the control circuit and is suitable for being used by a 3C electronic product or being connected with an external power supply to recharge the battery or the battery pack;
the method is characterized in that: the charging terminal is electrically connected with the control circuit, is configured to be mechanically connected with the shell and is suitable for being directly connected with an external AC power supply so as to recharge the battery or the battery pack;
the battery pack for the cordless power tool is provided with at least one of the following charging states:
the battery pack for the cordless electric tool is connected to the external power supply and used for recharging the battery or the battery pack through the bidirectional charging and discharging interface;
in a second state, the battery pack for the cordless power tool is connected to the AC power source for recharging the battery or battery pack through the charging terminal.
23. The battery pack for a cordless power tool of claim 22, wherein the bi-directional charge-discharge interface and the charging port inhibit simultaneous recharging of the battery or battery pack.
24. A battery pack for a cordless power tool according to claim 22 or 23, wherein the bi-directional charge and discharge interface and the charging port have different charging powers, the higher charging power being preferred for recharging the battery or battery pack when both are connected to the power supply.
25. The battery pack for a cordless power tool according to claim 24, wherein when the charging power of the one having the larger charging power is disconnected for recharging the battery or battery pack, the other one is automatically turned on for continuing recharging the battery or battery pack.
26. The battery pack for a cordless power tool of claim 22, wherein the bi-directional charge-discharge interface and the charging port have the same charging specification and charging power, both of which can be used to recharge the battery or battery pack at the same time.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111063173 | 2021-09-10 | ||
| CN2021110631734 | 2021-09-10 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115799668A true CN115799668A (en) | 2023-03-14 |
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ID=85302689
Family Applications (4)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221518536.9U Active CN219086045U (en) | 2021-09-10 | 2022-06-16 | Battery pack and electric tool |
| CN202210686171.9A Pending CN115799668A (en) | 2021-09-10 | 2022-06-16 | Battery pack for cordless power tool |
| CN202210689468.0A Pending CN115799669A (en) | 2021-09-10 | 2022-06-16 | Battery pack and electric tool |
| CN202221518535.4U Active CN218568949U (en) | 2021-09-10 | 2022-06-16 | Battery pack |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221518536.9U Active CN219086045U (en) | 2021-09-10 | 2022-06-16 | Battery pack and electric tool |
Family Applications After (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210689468.0A Pending CN115799669A (en) | 2021-09-10 | 2022-06-16 | Battery pack and electric tool |
| CN202221518535.4U Active CN218568949U (en) | 2021-09-10 | 2022-06-16 | Battery pack |
Country Status (1)
| Country | Link |
|---|---|
| CN (4) | CN219086045U (en) |
-
2022
- 2022-06-16 CN CN202221518536.9U patent/CN219086045U/en active Active
- 2022-06-16 CN CN202210686171.9A patent/CN115799668A/en active Pending
- 2022-06-16 CN CN202210689468.0A patent/CN115799669A/en active Pending
- 2022-06-16 CN CN202221518535.4U patent/CN218568949U/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN115799669A (en) | 2023-03-14 |
| CN219086045U (en) | 2023-05-26 |
| CN218568949U (en) | 2023-03-03 |
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