CN204179727U - A kind of power tool battery bag and charge-discharge system thereof - Google Patents
A kind of power tool battery bag and charge-discharge system thereof Download PDFInfo
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- CN204179727U CN204179727U CN201420701060.1U CN201420701060U CN204179727U CN 204179727 U CN204179727 U CN 204179727U CN 201420701060 U CN201420701060 U CN 201420701060U CN 204179727 U CN204179727 U CN 204179727U
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- charger
- power tool
- battery bag
- tool battery
- power brick
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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)
Abstract
The utility model discloses a kind of power tool battery bag and charge-discharge system thereof.A control unit is provided with in the power brick of electric tool, cell voltage and the temperature signal of battery unit can be gathered, and the signal of collection is sent to the Micro-processor MCV of charger and electric tool, the Micro-processor MCV of charger and electric tool processes and computing received data, thus control the charging and discharging process of power brick, so, the charging of power brick, the accuracy of control of discharge can be improved, the serviceability of power brick is improved.
Description
[technical field]
The utility model relates to a kind of power tool battery bag, particularly the charging and discharging control system of power brick.
[background technology]
The power brick of generally known electric tool, as shown in figure 17, the battery unit of multiple series connection, battery pack ID, temperature sensor and anode and cathode terminals is generally included in power brick, wherein battery pack ID can comprise the information such as such as model, version, element cell configuration and battery types, temperature sensor can be negative temperature coefficient (NTC) resistance, and the charging and discharging of power brick detects and controls fully to control separately by charger and instrument; But along with the high-power of direct current electric power tools, it is more and more that battery unit in the power brick of electric tool becomes, adopt existing power brick charging and discharging pattern, charger or instrument are owing to cannot sample to the multiple cell voltages in battery unit, and comparatively big error can be there is from charger or the tool ends end total voltage obtained of sampling, thus charging, the electric discharge of battery unit can not be controlled accurately, the serviceability that result in power brick declines.
[utility model content]
In order to solve the problem, the utility model proposes the charging of a kind of new power tool battery bag, the control system of electric discharge and method, can the charging and discharging function of detection and control power brick accurately, improve the serviceability of power brick.
The utility model provides following technical scheme: a kind of power tool battery bag, removably be connected with charger, comprise: housing, the battery unit be at least composed in series by two lithium batteries, the resistance be connected with lithium battery anode, a temperature sensor, for detecting the temperature of battery unit, also comprise a control unit, for the temperature signal of the voltage signal and described temperature sensor that gather the element cell of battery unit;
Further improvement project has: described temperature sensor is a negative temperature coefficient (NTC) resistance.
Further improvement project has: described control unit comprises a detecting unit and a microprocessor (MCU), detecting unit is for detecting cell voltage and the temperature of battery unit, power brick microprocessor (MCU) is for controlling described detecting unit, and storage battery bag ID data.
Further improvement project has: the data collected are sent to the charging microprocessor (MCU) of charger side by control unit by power brick microprocessor (MCU), charger side microprocessor (MCU) processes above-mentioned data, if institute's charger side microprocessor judges that the cell voltage detected is inconsistent, then perform equalization function.Charger side microprocessor (MCU) sends Balance route instruction to power brick side microprocessor (MCU) by communication port, power brick side microprocessor (MCU) controls detecting unit and performs Balance route instruction, element cell is allowed to discharge, until cell voltage is identical in fact.
Further improvement project has: a kind of charging method of power brick, comprising: a charger microprocessor (MCU) determines whether to realize being electrically connected with power brick to be charged by communication port; Voltage, temperature data that the microprocessor (MCU) of charger detects based on the control unit of power brick, perform predetermined charge mode; Power brick control unit automatically every 10ms to 1s periodically to charger MCU transmitting element cell voltage, temperature data.
The utility model provides another technical scheme to have: a kind of power tool battery bag, removably be connected with charger, this charger has charger microprocessor (MCU1) and Signal transmissions terminal, described power tool battery handbag is drawn together: housing, the battery unit be at least composed in series by two lithium element cells, the resistance be connected with lithium element cell positive pole, temperature sensor, for detecting the temperature of battery unit, Signal transmissions terminal is mutually electrically connected with the Signal transmissions terminal of charger; Described power tool battery bag also comprises a control unit, when the control unit of this power tool battery bag receives the microprocessor requirement command of above-mentioned charger; The control unit of electric tool will gather voltage and the temperature signal of the element cell of battery unit, and by the signal that collects by the timed sending of Signal transmissions terminal intervals to the microprocessor of described charger.
Owing to being provided with control unit in power brick, charger can monitor the cell voltage in charging process in real time, the temperature signal of battery unit, when cell voltage is inconsistent, can regulon cell voltage by control unit, cell voltage is made to be tending towards in fact identical, due in charging process, can the temperature of battery unit in real time in monitoring battery bag and cell voltage signal, therefore charging performance can be made more reliable, simultaneously in the discharge process of power brick, the microprocessor (MCU) of power tool body also can obtain temperature and the cell voltage signal of the battery unit in power brick in real time, the discharge process of power brick can be controlled accurately, thus improve the serviceability of power brick.
[accompanying drawing explanation]
Fig. 1: power brick schematic diagram of the present utility model.
Fig. 2: charger schematic diagram of the present utility model.
Fig. 3: power brick of the present utility model, electric tool schematic diagram.
Fig. 4: the circuit block diagram of rechargeable battery pack of the present utility model.
Fig. 5: the circuit block diagram of charger of the present utility model.
Fig. 6: the circuit block diagram of electric tool of the present utility model.
Fig. 7: the charging circuit figure of the power brick of the first embodiment of the present utility model.
Fig. 8: the discharge circuit figure of the power brick of the first embodiment of the present utility model.
Fig. 9: the power brick charging flow figure of the first embodiment of the present utility model.
Figure 10: the power brick discharge flow path figure of the first embodiment of the present utility model.
Figure 11: the charging circuit figure of the power brick of the second embodiment of the present utility model.
Figure 12: the discharge circuit figure of the power brick of the second embodiment of the present utility model.
Figure 13: the charging circuit figure of the power brick of the 3rd embodiment of the present utility model.
Figure 14: the discharge circuit figure of the power brick of the 3rd embodiment of the present utility model.
Figure 15: the power brick charging flow figure of the 3rd embodiment of the present utility model.
Figure 16: the power brick discharge flow path figure of the 3rd embodiment of the present utility model.
Figure 17: the block diagram of power brick of the prior art.
[embodiment]
Below in conjunction with accompanying drawing, specific description is done to embodiment of the present utility model, wherein Fig. 1 to Fig. 3 is respectively utility model power tool battery bag 2 used, and with the charger 1 of its pairing and electric tool 3, this power brick 2 has at least three terminals, wherein pair of terminal is the electric terminal be connected with charger, and another above terminal is Signal transmissions terminal (certainly also referred to as COM terminal), for making Signal transmissions with charger 1 or electric tool 3; In the present embodiment, electric tool 3 main presentation percussion drill, this power tool battery bag also can be used on other products certainly, as angle grinding machine, hay mover etc.
For the battery unit that five joint lithium batteries are composed in series in following execution mode.
Execution mode one:
As shown in Figure 4, be the circuit block diagram of the utility model power brick, this power brick 2 is lithium battery bag, and it comprises and is connected in series by more piece lithium element cell the battery unit formed; One temperature sensor, for detecting power brick temperature; The control unit be connected with battery unit, for detection, transmitting element cell voltage, temperature signal, and can the electric discharge of control unit battery.
As shown in Figure 5, for the circuit block diagram of charger of the present utility model, it comprises a microprocessor be connected with the control unit of power brick 2 (MCU1), for receiving the cell voltage of the control unit collection of power brick 2, temperature data to control charging circuit, regulate charging current, voltage, and control command is sent to the control unit of power brick 2; Also comprise an AC-DC (AC-DC) change-over circuit.
As shown in Figure 6, be the circuit block diagram of electric tool of the present utility model.It comprises a microprocessor (MCU2), it is connected with the microprocessor (MCU3) of power brick 2, for the switching circuit receiving the cell voltage of the control unit of power brick 2, temperature data carrys out control tool, regulate electric current or the power output of electric tool 3 motor.
As shown in Figure 7, be the charging circuit figure of power brick 2 of the present utility model.The both positive and negative polarity of battery unit is connected with the both positive and negative polarity of charger 1; Described control unit comprises a detecting unit and a Micro-processor MCV 3, stores battery ID information in Micro-processor MCV 3.Multiple resistance R1, R2, R3, R4, R5 one end respectively with element cell cell1, cell2, cell3, cell4, the positive pole of cell5 connects, the other end is connected with detecting unit, for detecting and regulon cell voltage, one negative temperature coefficient be connected with detecting unit (NTC) resistance, for detecting the temperature of battery unit, Micro-processor MCV 3 is connected with detecting unit, and by communication ends COM (also referred to as Signal transmissions terminal, identical as follows) carry out transfer of data with the Micro-processor MCV 1 of charger 1, the Micro-processor MCV 1 of charger 1 receives the ID of power brick, cell voltage, temperature data, and process computing is carried out to the data received, thus control charging circuit, implement charging.
Concrete charging process as shown in Figure 9, when power brick 2 not yet inserts charger 1, charger communication end COM is high level, charger 1 is in holding state always, after power brick 2 inserts charger 1, charger communication end COM level is dragged down, recognize power brick 2 to insert, charger 1 sends a charge initiation instruction to power brick 2, power brick 2 is activated, its Micro-processor MCV 3 receives described charge initiation instruction, and control the cell voltage that detecting unit detects battery unit, temperature signal, and by described voltage, temperature and power brick ID data send to the Micro-processor MCV 1 of charger 1, if the ID signal that the power brick 2 that judges the Micro-processor MCV 1 of charger 1 transmits can be identified, then further judging unit cell voltage, whether temperature data is normal, if display power brick 2 is not yet full of, then start to charge to power brick 2.Communication mode in charging process is: the Micro-processor MCV 3 in power brick controls detecting unit to the voltage of the battery unit in power brick and temperature real-time sampling, every 10ms-1s periodically by cell voltage, temperature and ID signal initiatively send to charger 1 Micro-processor MCV 1 by communication ends COM, cycle preferred 100ms, the Micro-processor MCV 3 of charger 1 processes the data received, for No. 18650 lithium batteries, if the minimum value of more piece cell voltage is lower than 2.5V, the Micro-processor MCV 1 of charger 1 controls charging circuit and carries out precharge to power brick 2, if cell voltage minimum value is more than or equal to 2.5V and is less than 4.18V, carry out constant current charge, if cell voltage minimum value is more than or equal to 4.18V, carry out constant voltage charge, in constant voltage charge process, if charging current is less than 0.1C, represent charging complete.If power brick 2 cannot be mated or power brick 2 is full of, then complete charge.
After power brick is full of, if the Micro-processor MCV 1 of charger 1 judges that the voltage of multiple element cell cell1, cell2, cell3, cell4, the cell5 received is inconsistent, and the difference of maxima and minima is greater than preset value, then perform equalization function, described preset value is more than or equal to 50mV.The Micro-processor MCV 1 of charger 1 side sends Balance route instruction to power brick 2 side Micro-processor MCV 3 by communication ends COM, power brick 2 side Micro-processor MCV 3 controls detecting unit and performs Balance route instruction, to element cell electric discharge, make all cell voltages identical in fact.As: if detect, cell3 voltage is higher than other cell voltages and difference is greater than preset value, then connect resistance R3, allow cell3 discharge separately through resistance R3, until cell3 voltage drops to identical with other cell voltages.
As shown in figs, be discharge circuit and the flow chart of power brick 2 of the present utility model.The anode and cathode terminals of battery unit is connected with the anode and cathode terminals of electric tool 3; The Micro-processor MCV 3 of power brick 2 is connected with the Micro-processor MCV 2 of electric tool 3 by communication ends COM.The concrete discharge process of power brick 2 is as follows: the Micro-processor MCV 2 of electric tool 3 detects that tool switch is triggered, then notify that the Micro-processor MCV 3 of power brick 2 sends the cell voltage of power brick 2, temperature and battery ID data, if the data that electric tool 3 receives are normal, then allow the switching circuit of instrument of opening, power brick 2 starts electric discharge.The Micro-processor MCV 3 of power brick 2 at interval of 100ms-1s periodically initiatively transmitting element cell voltage, temperature and power brick ID data to the Micro-processor MCV 2 of electric tool 3, cycle preferred 100ms.The Micro-processor MCV 2 of electric tool 3 is according to the Data Control discharging current, the voltage that receive, if cell voltage reaches cut-ff voltage or discharging current exceedes the maximum permission discharging current of power brick, then terminates electric discharge.
Execution mode two:
As is illustrated by figs. 11 and 12, be the charging and discharging circuit diagram of the utility model second embodiment, be connected with reference voltage Vcc after negative temperature coefficient (NTC) resistance and a divider resistance R connect, sampled data is directly sent to Micro-processor MCV 3.Execution mode two and execution mode one basic simlarity, its charging and discharging flow chart can the charging and discharging flow chart of reference example one, its main distinction is: power brick 2 and charger 1, or the communication mode difference between electric tool 3, that is: the communication mode in charging process: the Micro-processor MCV 1 of charger 1 sends data sampling order or data requesting instructions by communication ends COM to power brick 2 Micro-processor MCV 3, the Micro-processor MCV 3 of power brick 2 controls the corresponding data of sampling unit collection and processes corresponding data, then result is sent to the Micro-processor MCV 1 of charger 1 by communication ends COM.As: if the Micro-processor MCV 1 of charger 1 needs single battery voltage data, the five batteries voltage signals collected compare by the Micro-processor MCV 3 of power brick 2, select maximum wherein, and send it to the Micro-processor MCV 1 of charger 1.If the Micro-processor MCV 1 of charger 1 needs the temperature data signal of battery unit, this temperature data also compares with preset value by Micro-processor MCV 3 collecting temperature data of power brick 2, and comparative result is sent to the Micro-processor MCV 1 of charger 1.
Communication mode in discharge process is identical with the communication mode in charging process, realize duplex communication by communication ends COM between power brick 2 and electric tool 3, the Micro-processor MCV 3 of power brick 2 is answered the request command collection of the Micro-processor MCV 2 of electric tool 3 and sends related data result.
Execution mode three:
With execution mode one unlike, as shown in Figure 13 to Figure 16, control unit in power brick 2 only comprises a detecting unit, not Micro-processor MCV 3, communication mode in the charging process of therefore power brick 2 is: the Micro-processor MCV 1 of charger 1 is crossed communication ends COM1 and sent data request command, the data that detecting unit in power brick 2 will gather needed for charger 1, as cell voltage, temperature, power brick ID data, and the data needed by charger 1 send to charger 1 by communication ends COM2.Communication mode in the discharge process of power brick 2 is: the Micro-processor MCV 2 of electric tool 3 sends data request command, and the detecting unit in power brick 2 gathers the data needed for electric tool 3, and sends to electric tool 3.
Above embodiment does not limit the utility model in any form, the technical scheme that the mode that all employings are equal to replacement or equivalent transformation obtains, and all drops in protection range of the present utility model.
Claims (8)
1. a power tool battery bag, is removably connected with charger, comprising:
Housing,
The battery unit be at least composed in series by two lithium element cells,
The resistance be connected with lithium element cell positive pole,
Temperature sensor, for detecting the temperature of battery unit,
At least three terminals, wherein pair of terminal is the both positive and negative polarity be connected with charger, and at least another terminal is the Signal transmissions terminal be electrically connected with charger;
It is characterized in that: described power tool battery bag also comprises a control unit, for gathering voltage and the temperature signal of the element cell of battery unit, and by the signal that collects by the timed sending of Signal transmissions terminal intervals to described charger.
2. power tool battery bag according to claim 1, is characterized in that: described temperature sensor is a negative temperature coefficient (NTC) resistance.
3. power tool battery bag according to claim 2, it is characterized in that: described control unit comprises a detecting unit and a microprocessor (MCU3), detecting unit is for detecting cell voltage and the temperature of battery unit, power brick microprocessor (MCU3) is for controlling described detecting unit, and storage battery bag ID data.
4. power tool battery bag according to claim 3, it is characterized in that: if the cell voltage that described detecting unit detects is inconsistent, then by discharging to corresponding element cell to the resistance that element cell connects, make cell voltage identical in fact.
5., for a charge-discharge system for power tool battery bag in claim 1, comprising:
Charger has charger microprocessor (MCU1);
This charger microprocessor (MCU1) determines whether to realize being electrically connected with power tool battery bag to be charged by communication port;
It is characterized in that: described power tool battery bag control unit is automatically periodically to charger microprocessor (MCU1) transmitting element cell voltage and temperature data signal; Voltage, temperature data signal that the microprocessor (MCU1) of charger detects based on the control unit of power brick, perform predetermined charge mode.
6. for a charge-discharge system for power tool battery bag in claim 5, it is characterized in that: described power tool battery bag control unit is every the periodic transmission of data signals of 10ms to 1s.
7. the charge-discharge system for power tool battery bag in claim 6, it is characterized in that: if the cell voltage that described detecting unit detects is inconsistent, charger microprocessor sends corresponding data, the control unit of notice power tool battery bag discharges to corresponding element cell, makes cell voltage identical in fact.
8. a power tool battery bag, is removably connected with charger, and this charger has charger microprocessor (MCU1) and Signal transmissions terminal, and described power tool battery handbag is drawn together: housing,
The battery unit be at least composed in series by two lithium element cells,
The resistance be connected with lithium element cell positive pole,
Temperature sensor, for detecting the temperature of battery unit,
Signal transmissions terminal is mutually electrically connected with the Signal transmissions terminal of charger;
It is characterized in that: described power tool battery bag also comprises a control unit, when the control unit of this power tool battery bag receives the microprocessor requirement command of above-mentioned charger; The control unit of electric tool will gather voltage and the temperature signal of the element cell of battery unit, and by the signal that collects by the timed sending of Signal transmissions terminal intervals to the microprocessor of described charger.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420701060.1U CN204179727U (en) | 2014-11-20 | 2014-11-20 | A kind of power tool battery bag and charge-discharge system thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420701060.1U CN204179727U (en) | 2014-11-20 | 2014-11-20 | A kind of power tool battery bag and charge-discharge system thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104795854A (en) * | 2014-11-20 | 2015-07-22 | 江苏东成机电工具有限公司 | Electric tool battery pack and charge-discharge system thereof |
| CN107221985A (en) * | 2017-07-07 | 2017-09-29 | 浙江派尼尔科技股份有限公司 | The integrated control method and system of motor and battery bag |
| CN108152748A (en) * | 2017-12-14 | 2018-06-12 | 株洲广锐电气科技有限公司 | Ice storing time system and its detection method |
| CN108172917A (en) * | 2018-03-04 | 2018-06-15 | 江苏东成机电工具有限公司 | A kind of charging combination, charger and battery pack recognition methods |
| WO2019037793A1 (en) * | 2017-08-25 | 2019-02-28 | 苏州宝时得电动工具有限公司 | Electric tool and method for supplying power to electric tool |
-
2014
- 2014-11-20 CN CN201420701060.1U patent/CN204179727U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104795854A (en) * | 2014-11-20 | 2015-07-22 | 江苏东成机电工具有限公司 | Electric tool battery pack and charge-discharge system thereof |
| CN107221985A (en) * | 2017-07-07 | 2017-09-29 | 浙江派尼尔科技股份有限公司 | The integrated control method and system of motor and battery bag |
| WO2019037793A1 (en) * | 2017-08-25 | 2019-02-28 | 苏州宝时得电动工具有限公司 | Electric tool and method for supplying power to electric tool |
| US11450895B2 (en) | 2017-08-25 | 2022-09-20 | Positec Power Tools (Suzhou) Co., Ltd | Electric tool and method for supplying power to electric tool |
| CN108152748A (en) * | 2017-12-14 | 2018-06-12 | 株洲广锐电气科技有限公司 | Ice storing time system and its detection method |
| CN108172917A (en) * | 2018-03-04 | 2018-06-15 | 江苏东成机电工具有限公司 | A kind of charging combination, charger and battery pack recognition methods |
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