CN104753127A - Battery pack, charging assembly, electric tool and break line detection method - Google Patents
Battery pack, charging assembly, electric tool and break line detection method Download PDFInfo
- Publication number
- CN104753127A CN104753127A CN201410841937.1A CN201410841937A CN104753127A CN 104753127 A CN104753127 A CN 104753127A CN 201410841937 A CN201410841937 A CN 201410841937A CN 104753127 A CN104753127 A CN 104753127A
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- China
- Prior art keywords
- series unit
- power brick
- voltage
- unit
- battery core
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/00032—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by data exchange
- H02J7/00036—Charger exchanging data with battery
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/0036—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using connection detecting circuits
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
- H01M10/482—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for several batteries or cells simultaneously or sequentially
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2220/00—Batteries for particular applications
- H01M2220/30—Batteries in portable systems, e.g. mobile phone, laptop
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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
Abstract
The invention discloses a battery pack. The battery pack comprises a series unit, a voltage detection module and a battery pack control module, wherein the series unit is formed by more than one series unit, the voltage detection module is used for respectively detecting voltage signals of high voltage ends of a plurality of series units, and the battery pack control module is used for receiving voltage signals detected by the voltage detection module and calculating the voltage values of the series units; the series units comprise more than one core, wherein a plurality of cores in one series unit are connected in parallel; the battery pack control module is used for judging whether the series units have disconnected cores according to time data and the voltage values of the series units. According to the battery pack provided by the invention, the using safety can be ensured.
Description
Technical field
The present invention relates to power brick, charging combination, electric tool and wire break detection method.
Background technology
Power brick is the key link that restriction Wireless Power Tools develop as the power resources of Wireless Power Tools always, power brick in the past often only has the output voltage of below 30V, they, when driving powerful electric tool, often cause the problem of the flying power difference that is short of power.
Still do not have a kind of output voltage more than 30V now and circuit structure can ensure the charging combination of use safety in charging.
Summary of the invention
For solving the deficiencies in the prior art, the object of the present invention is to provide a kind of power brick and comprise charging combination and the electric tool of power brick, they are all by detecting to power brick the use safety ensureing power brick.
In order to realize above-mentioned target, the present invention adopts following technical scheme:
A kind of power brick, it comprises:
More than one series unit forming series connection each other;
Voltage detection module, for detecting the voltage signal of multiple series unit high-pressure side respectively; With
Power brick control module, the voltage signal detected for receiver voltage detection module also calculates the magnitude of voltage of series unit;
Wherein, series unit comprises more than one battery core, and the multiple battery cores in a series unit are in parallel;
Power brick control module can judge whether there is the battery core disconnected in series unit according to the magnitude of voltage of time data and series unit.
Further, power brick control module comprises:
Burn out detection module, can judge whether there is the battery core disconnected in series unit according to the magnitude of voltage of series unit and the relativeness of time.
Further, burn out detection module comprises:
Timing unit, for providing time data;
Slope calculation unit SCU, for calculating the slope value of the magnitude of voltage relative time of series unit; With
Whether judging unit, exist for judging according to the slope value of series unit the battery core disconnected in series unit.
The present invention also proposes a kind of power brick, and it comprises:
More than one series unit forming series connection each other;
Voltage detection module, for detecting the voltage signal of multiple series unit high-pressure side respectively; With
Power brick control module, the voltage signal detected for receiver voltage detection module also calculates the magnitude of voltage of series unit;
Wherein series unit comprises more than one battery core, and the multiple battery cores in a series unit are in parallel;
Power brick also comprises:
Burn out detection module, can judge whether there is the battery core disconnected in series unit according to the magnitude of voltage of time data and series unit.
Further, burn out detection module comprises:
Timing unit, for providing time data;
Slope calculation unit SCU, for calculating the slope value of the magnitude of voltage relative time of series unit; With
Whether judging unit, exist for judging according to the slope value of series unit the battery core disconnected in series unit.
The present invention also proposes a kind of charging combination, comprises power brick and the charger for its charging,
Power brick comprises: more than one series unit forming series connection each other;
Series unit comprises plural battery core, and the multiple battery cores in a series unit are in parallel;
Charging combination also comprises:
Voltage detection module, for detecting the voltage signal of multiple series unit high-pressure side respectively;
Power brick control module, the voltage signal detected for receiver voltage detection module also calculates the magnitude of voltage of series unit; With
Burn out detection module, can judge whether there is the battery core disconnected in series unit according to the magnitude of voltage of series unit.
Further, burn out detection module comprises:
Timing unit, for providing time data;
Slope calculation unit SCU, for calculating the slope value of the magnitude of voltage relative time of series unit; With
Whether judging unit, exist for judging according to the slope value of series unit the battery core disconnected in series unit.
The present invention also proposes a kind of electric tool comprising power device and power brick, and power brick can be powered for power device, and power brick comprises the series unit that more than forms series connection each other; Series unit comprises plural battery core, and the multiple battery cores in a series unit are in parallel;
Electric tool and also comprising:
Voltage detection module, for detecting the voltage signal of multiple series unit high-pressure side respectively;
Power brick control module, the voltage signal detected for receiver voltage detection module also calculates the magnitude of voltage of series unit; With
Burn out detection module, can judge whether there is the battery core disconnected in series unit according to the magnitude of voltage of series unit.
Further, burn out detection module comprises: timing unit, for providing time data;
Slope calculation unit SCU, for calculating the slope value of the magnitude of voltage relative time of series unit; With
Whether judging unit, exist for judging according to the slope value of series unit the battery core disconnected in series unit.
The present invention also proposes a kind of wire break detection method, and whether disconnect for the circuit detected between battery core in parallel in power brick, power brick comprises the series unit that more than forms series connection each other, and tandem compound comprises the battery core of two or more parallel connection; Detection method comprises:
Detect the voltage signal of tandem compound high-pressure side;
Calculate the slope value of tandem compound magnitude of voltage relative time;
Judge in series unit, whether to there is the battery core disconnected according to the slope value of tandem compound.
Usefulness of the present invention is: provide a kind of power brick and comprise charging combination and the electric tool of power brick, and they all ensure the fail safe of this power brick in charging, discharge process by carrying out power brick detecting.
Accompanying drawing explanation
Fig. 1 is the schematic block diagram of a power brick of the present invention preferred embodiment;
Fig. 2 is for realizing the schematic block diagram of a preferred embodiment of current detection section in power brick of the present invention;
Fig. 3 is for realizing the schematic block diagram of another preferred embodiment of current detection section in power brick of the present invention;
The schematic block diagram of Fig. 4 charger of the present invention preferred embodiment;
Fig. 5 is that the present invention charges the schematic block diagram of a combination preferred embodiment;
Fig. 6 is the schematic diagram for series unit interrupt line;
Fig. 7 is power brick detection method concrete steps logic diagram in the present invention;
Fig. 8 is the schematic block diagram of a preferred embodiment of power device in electric tool of the present invention.
Embodiment
Below in conjunction with the drawings and specific embodiments, concrete introduction is done to the present invention.
Shown in Fig. 3, power brick 100 mainly comprises: battery core group 11, terminal module 12, thermal module 13, voltage detection module 14, power brick communication module 15 and control their power brick control module 16.
Battery core group 11 comprises: more than one series unit 111.When the number of series unit 111 is more than or equal to 2, connect between different series unit 111, the entirety that they are formed is battery core group 11.
A series unit 111 comprises: more than one battery core 111a.When the number of the battery core 111a in same series unit 111 is greater than 2, a formation in parallel series unit 111 between different battery core 111a.
As shown in Figures 2 and 3, as a kind of preferred version, series unit 111 comprises two battery core 111a in parallel.
Terminal module 12 forms respectively with battery core group 11 and power brick control module 16 and is electrically connected, and it is provided with for forming with the external world power brick positive terminal B+ and power brick negative terminal B-that are connected to realize electric energy or signal transmission.
When power brick 100 is charged, terminal module 12 can make the battery core 111a in battery core group 11 be in charged state, also can provide electric energy for power brick 100 other modules inner and assembly simultaneously.
Thermal module 13 comprises: temperature element 131 and temperature signal module 132, and wherein temperature element 131 is for detecting the internal temperature of power brick 100.
Temperature element 131 is arranged on the inside of power brick 100, and specifically temperature element 131 arranges the position near battery core 111a in power brick 100, the change of battery core 111a temperature can be detected.Preferably, temperature element 131 can adopt thermistor, especially a NTC thermistor.
Temperature signal module 132 is electrically connected with temperature element 131 and power brick control module 16 respectively, and the testing result of temperature element 131 can be fed back to power brick control module 16 and be subject to the control of power brick control module 16 by it.Temperature signal module 132 is provided with the power brick temperature terminal T for being electrically connected with external temperature terminal.
Voltage detection module 14 is for detecting the magnitude of voltage of each series unit 111 in battery core group 11, and voltage detection module 14 forms with battery core group 11 and power brick control module 16 respectively and is electrically connected.
Voltage detection module 14 detects the voltage signal in battery core group 11 and sends voltage signal to power brick control module 16, the voltage signal calculating voltage value that power brick control module 16 transmits according to voltage detection module 14, to realize the monitoring of the voltage security to power brick 100.
Power brick communication module 15 is for realizing the exchange of data or signal, and it forms with power brick control module 16 and is electrically connected.Power brick communication module 15 both can adopt signal wiring to realize transfer of data wireless connections also can be adopted to realize transfer of data.
Due to power brick 100 there is higher voltage and power output, therefore when being connected with charger, power device etc., to communication connect reliability requirement higher.
As shown in Figure 1 and Figure 5, as a kind of preferred version, power brick communication module 15 adopts the mode of signal wiring to realize data transmission.
Specifically, power brick communication module 15 is provided with a power brick communication terminal D.When power brick 100 is assembled with outside charger and power device, the terminal that this power brick communication terminal D can be corresponding with charger and power device forms physical connection.
Power brick control module 16 is mainly used in realizing the function such as logical operation, Process flowchart, and it can control each assembly in power brick 100 and module, ensures that power brick 100 is charged, safety when discharging.
As a kind of preferred version, power brick 100 also comprises the power brick electricity quantity display module (not shown) be electrically connected with power brick control module 16, and this power brick electricity quantity display module is for showing the middle dump energy of power brick 100.
Power brick 100 at least has the output voltage of 56V, here the output voltage of indication refer to power brick 100 when being filled possess the ability of output voltage, generally speaking, along with the carrying out of discharge process, the ability of the voltage that power brick 100 exports can decline.Certainly, here " power brick 100 at least has the output voltage of 56V " of indication does not get rid of power brick 100 when needed, reduced the situation of output voltage by internal circuit, " power brick 100 at least has the output voltage of 56V " only represents that power brick 100 has the ability exporting 56V voltage.
The power capacity of power brick 100 is greater than 100Wh, as a kind of preferred version, power brick 100 comprises 14 series units 111, each series unit 111 comprises one or two battery core 111a, each battery core 111a has the nominal voltage of 4V, and the battery core group 11 formed so at least has the total voltage of 56V when each battery core 111a is in nominal voltage.
Below the voltage detection module 14 in power brick 100 is mainly introduced.
Voltage detection module 14 is for detecting the voltage signal of series unit 111 high-pressure side respectively.
Preferably, voltage detection module 14 comprises testing circuit 143.The high-pressure side other end that testing circuit 143 one end is connected to series unit 111 is connected to power brick control module 16.
Generally there is multiple series unit 111 in battery core group 11, in order to realize comprehensive detection, voltage detection module 14 is provided with multiple testing circuit 143.
If make the voltage signal that power brick control module 16 accepts from multiple testing circuit 143 simultaneously, power brick control module 16 at least needs to be provided with the microprocessor that has multiple signaling interface, or adopts multi-microprocessor.
Higher to processor requirement when adopting the first scheme, and the number of the signaling interface of microprocessor must be corresponding with needing the number of the testing circuit 143 accessed, suitability is poor; A kind of scheme after adopting, the space that improve cost undoubtedly He take.
Generally speaking, a microprocessor generally has the interface of a voltage signal, but microprocessor often has higher processing speed.
In order to realize detecting multiple series unit 111, voltage detection module 14 of the present invention also comprises timesharing module 146.
The effect of timesharing module 146 is to control testing circuit 143, and it at least can control testing circuit 143 makes its two ends disconnect or make its two ends conducting.
With reference to shown in Fig. 2, multiple testing circuit 143 couples together, then by same circuit access power brick control module 16.The multiple testing circuits 143 linked together as a test set 141,
The voltage signal of collection is sent to power brick control module 16 by same bus by the multiple testing circuits 143 in a test set 141 under the control of same timesharing module 146.
Power brick control module 16 makes multiple testing circuit 143 timesharing conducting by controlling timesharing module 146.Be equivalent to power brick control module 16 like this at the instantaneous voltage signal receiving only a testing circuit 143, so only need a microprocessor with individual signals interface.And timesharing module 146 and testing circuit 143, as the peripheral circuit of power brick control module 16, can make concrete setting according to series unit 111 number, and different microprocessors need not be configured because series unit 111 number is different.
Timesharing module 146 is electrically connected with power brick control module 16, and power brick control module 16 can control timesharing module 146, and then indirectly controls the timesharing conducting of multiple testing circuit 143.
Preferably, testing circuit 143 comprises an on-off element 144, this on-off element 144 comprises two links and a control end (not shown), and wherein two links are divided into: be connected to the test side 144a of series unit 111 and the output for being connected to power brick control module 16.Control end receives the signal of timesharing module 146 and controls on-off element two links and be turned on or off.
With reference to shown in Fig. 2, the on-off element 144 in the testing circuit 143 in same test set 141 is finally connected to same place, is then connected to power brick control module 16.
With reference to shown in Fig. 2, also comprise a divider resistance 145 in testing circuit 143, divider resistance 145 both can be connected to on-off element 144 output 144b side as shown in Figure 2, also can be connected to 144a side, on-off element 144 test side.
When detecting, timesharing module 146 makes all on-off element 144 timesharing conductings in a test set 141 under the control of power brick control module 16, when two link conductings of the on-off element 144 of a testing circuit 143, two links of the on-off element 144 of remaining testing circuit 143 disconnect,, ensure to only have the conducting of an on-off element 144 in a test set 141 at every turn.
Timesharing module 146 can by interval switching time controlling to send to the signal length of on-off element 144 control end to control between time of on-off element 144 conducting and the different on-off element 144 of conducting.
As shown in Figure 2, power brick control module 16 control timesharing module 146 can make on-off element 144 successively conducting then turn off, switch from the testing circuit 143 being arranged in low pressure side (right side of Fig. 2), each switching all makes total divider resistance 142 connect from different divider resistances 145 and form loop with the series unit 111 of different number, Figure 2 shows that example, when being positioned at on-off element 144 conducting of the rightmost side, its voltage is carried on the divider resistance 145 of total divider resistance 142 and the rightmost side by the series unit 111 being positioned at the rightmost side, now power brick control module 16 can calculate magnitude of voltage on the series unit 111 of the rightmost side (because total divider resistance 142 by the magnitude of voltage gathered on total divider resistance 142, divider resistance 145 resistance is all fixed values), after completing detection action, power brick control module 16 controls timesharing module 146 and carries out switching action, disconnect the on-off element 144 of the rightmost side and make right side second on-off element 144 conducting, now total divider resistance 142 is connected with second, right side on-off element 144, the series unit 111 of the rightmost side and second, right side series unit 111 by respective voltage-drop loading on total divider resistance 142 and second, right side divider resistance 145, now power brick control module 16 calculates the voltage sum of second series unit 111 in the rightmost side and right side again by the magnitude of voltage gathered on total divider resistance 142, the magnitude of voltage recording rightmost side series unit 111 before deducting again can draw the magnitude of voltage of second series unit 111 in right side.Switch the on-off element 144 in each testing circuit 143 successively according to above method and calculate accordingly, so just all series units 111 being monitored.By distributing different resistance values for different divider resistances 145, make when the series unit 111 of different number loads, the magnitude of voltage that total divider resistance 142 is shared is within the specific limits constant as far as possible, so the voltage signal be input in power brick control module 16 is relatively stable, can not cause unnecessary interference.
Preferably, power brick control module on-off element 144 can be the element such as triode, field effect transistor.
In order to realize higher output voltage and have larger power capacity in the power brick 100 introduced as front, it comprises more series unit 111.
If only only arrange a test set 141 and a microprocessor in power brick control module 16, microprocessor needs to have higher clock frequency and disposal ability, increase energy consumption so undoubtedly, and sense cycle is longer.
As shown in Figure 3, as a kind of preferred version, voltage detection module 14 comprises: the first test set 147 and the second test set 148, and power brick control module 16 comprises: can carry out detecting to the first test set 147 and the second test set 148 respectively and form with it a MCU unit 161 and the 2nd MCU unit 162 of electrical connection.
First test set 147 detects adjacent multiple series units, and the second test set 148 detects other adjacent series unit.The testing circuit being sent to a MCU unit 161 by voltage signal is connected to adjacent series unit respectively; Testing circuit voltage signal being sent to the 2nd MCU162 unit is connected to other adjacent series unit respectively.
Wherein, one MCU unit 161 can adopt operational capability stronger, run the MCU chip that clock frequency is higher, and comparatively speaking, because the 2nd MCU unit 162 can only realize detecting and testing result being sent to a MCU unit 161 processing, so it can adopt the MCU chip that operational capability is general, so can realize detecting fast, a MCU unit 161 that primary responsibility can not be caused again to control needs to process too much data.
As further preferred, the number of series unit 111 is even number, they are divided into two parts: first detection segment 112 that can be detected by the first test set 147 and the second test set 148 respectively and the second detection segment 113, first detection segment 112, second detection segment 113 comprise N/2 continuous print series unit 111 respectively; The low-pressure end of battery core group 11 is the low-pressure end 112a of the first detection segment 112, and the high-pressure side of battery core group 11 is the high-pressure side 113a of the second detection segment 113.
So just multiple series unit 111 is divided into two groups of decile, one MCU unit 161 and the 2nd MCU unit 162 are detected them respectively, it should be noted that, for a MCU unit 161 and the 2nd MCU unit 162, they are when carrying out voltage acquisition, and the zero-potential point of respective MCU chip should be electrically connected with potential minimum place 112a, 113b in the series unit 111 being responsible for separately detecting respectively.
As a kind of preferred version, as above the voltage detection module introduced and power brick control module can be arranged on into power brick charging charger and use in the power device of power brick, by power brick and the direct splicing ear of charger, power brick and power device and be arranged on internal wiring in power brick and realize circuit structure as described above and measuring ability.
With reference to shown in Fig. 4, charger 200 comprises: rectification module 21, charger detection module 22, charging module 23, temperature control module 24, charger communication module 25 and control them and form with them charger control module 26 be electrically connected.
Wherein, rectification module 21 is provided with power supply terminal L, N for connecting external electric energy source, they are for the energy source of incoming transport electricity as charger, the AC conversion of access can be that in charger 200, each several part is suitable for the electric energy used by rectification module 21, and AC conversion is that direct current is for charger control module 26 and charging module 23 by such as rectification module 21.Preferably, rectification module 21 comprises: EMC circuit and LLC circuit.
Charger detection module 22 is electrically connected with rectification module 21 and charging module 23 respectively, and electrical energy transfer is also detected to feed back to charger control module 26 to the electrical energy parameter of charging module 23 to charging module 23 by charger detection module 22 by charger detection module 22 rectification module 21 simultaneously.
Charging module 23 is provided with charger positive pole C+, charger negative pole C-for exporting rechargeable electrical energy.When charging, they can be connected with the power brick positive terminal B+ of power brick 100 and power brick negative terminal B-respectively.
Temperature control module 24 is electrically connected with charging module 23, and it can carry out temperature detection to charging module 23 with to the power brick 100 be connected on charger 200.Specifically, temperature control module 24 is provided with a charger temperature terminal T ', when the power brick positive terminal B+ of power brick 100 is connected with power brick negative terminal B-formation, charger temperature terminal T ' is also connected with power brick temperature terminal T, so, temperature control module 24 just can obtain data or the signal of power brick 100 internal temperature by the temperature element 131 of power brick 100 inside, and then sends data or signal to charger control module 26 charger control module.
As a kind of preferred version, charger 200 also comprises: the heat abstractor 27 be electrically connected with charger control module 26 and charger electricity quantity display module 28, and this charger electricity quantity display module 28 is full of how many electricity by charger 200 for showing power brick 100.
Heat abstractor 27 is for when charger 200 temperature is higher or when power brick 100 temperature of charging is higher, by air current flow, forced heat radiation is carried out to charger 200 or power brick 100, specifically, be an electric fan as preferred heat abstractor 27, it comprises: motor and fan (all not shown in figure), wherein motor-driven fan rotates, and charger control module 26 by the rotating speed regulating the duty ratio of drive motors to regulate motor, thus can control the intensity of heat radiation.Also indirectly can be controlled the fan in charger 200 by communication by power brick 100.
Charger communication module 25 is provided with a charger communication terminal D ', when charging, the power brick communication terminal D of power brick 100 forms connection with it, thus makes the charger control module 26 in charger 200 and power brick control module 16 composition data of power brick 100 or the mutual of signal.
With reference to shown in Fig. 5, the charging combination 300 as a kind of preferred version comprises power brick 100 and the charger 200 of above introduction.
Because charger 200 has higher output voltage, in order to ensure safety, when needing charger 200 not connect power brick 100, do not export electric energy.
In charging combination 300, by the function setting of charge protection in charger 200.
As a kind of preferred version, charger 200 also comprises: charging protecting module (not shown).
Charging protecting module is electrically connected with charger temperature terminal T '; whether it has been connected to the power brick temperature terminal T of power brick 100 by detecting charger temperature terminal T '; thus whether detection charger 200 has been connected to power brick 100; if do not connect power brick 100, then control charging module 23 and make it not export electric energy.
Specifically, by the magnitude of voltage gathered on charger temperature terminal T ', charging protecting module judges whether charger 200 is connected to power brick 100.This can make it have certain voltage to realize by the power brick temperature terminal T arranging power brick 100, when charger temperature terminal T ' is not connected with power brick temperature terminal T, T ' is unsettled for charger temperature terminal, and when being connected with power brick temperature terminal T at charger temperature terminal T ', charger temperature terminal T ' is with certain voltage.
Charger protection circuit directly controls charging module 23 by charger temperature terminal T ' varying voltage signal when being connected to temperature element 131 and not being connected to temperature element 131.Such benefit is, when there is no plug-in mounting power brick 100, charger 200 is owing to there being the guarantee of hardware, so charger positive pole C+ can not be made, C-is charged for charger negative pole, ensure that use safety, this functional realiey does not arrange extra splicing ear simultaneously, and simplifies the setting of splicing ear based on existing charger temperature terminal T ', cost-saving.
In charger 200, charger control module 26 also can detect the voltage signal of charger temperature terminal T '.When plug-in mounting power brick 100; charger control module 26 can detect the voltage signal of charger temperature terminal T '; and then trigger the charging procedure of charger control module 26, when not detecting charger temperature terminal T ', charger control module 26 enables software protection program.
As mentioned above, charger 200 charge time by hardware and software two to charging safety ensure.
Below introduce a kind of charge control method, based on above power brick 100, charger 200 and they form charging combination 300.
Generally speaking, this control method protects two aspects, is wherein charge protection on the one hand:
Charger control module 26 starts charge protection program when detecting and connecting power brick 100 and controls charging module 23; charger temperature terminal T ' is electrically connected to charging module 23 and forms hardware protection; when charger temperature terminal T ' disconnects with power brick temperature terminal T, the electric energy of charging module 23 charge closing device positive pole C+, charger negative pole C-exports.
On the other hand, this control method comprises the Activiation method of charger 200 to the power brick 100 be under over-discharge state.
Power brick 100 is discharged after over-discharge can, and the electricity of battery core group 111 is not enough to support that power brick control module 16 and the charger control module 26 of charger 200 are set up effectively to be connected and realizes controlling and data interaction.
Because power brick 100 and charger 200 have large voltage, powerful characteristic, so it is very dangerous for carrying out charging in power brick control module 16 closed condition, so be very necessary when power brick 100 over-discharge can to its activation, specifically, this Activiation method is as follows:
Charger 200 charger control module detects charger temperature terminal T '.
According to the voltage signal of charger temperature terminal T ', charger 200 judges whether charger 200 is connected with power brick 100; If be connected to power brick 100, proceed next step.
Charger 200 judges whether the data message receiving power brick 100 transmission, if do not receive the data message of power brick 100 transmission, activates power brick 100.
Specifically, charger communication module 25 is not when receiving the communication information of power brick communication module 15, and charger control module 26 controls charging module 23 pairs of power brick 100 and carries out activating charge until the power brick control module 16 of power brick 100 and power brick communication module 15 recover normally to make charger communication module 25 receive the communication information of power brick communication module 15 or arrive the activationary time upper limit.
When activating, being not carry out activating charge after not receiving communication information at once, but a time range can be set, if communication information do not detected all the time in this time range, then carrying out activating charge.
The constant current charge that electric current is less can be adopted, as this electric current preferred between 0.01C to 0.1C during activating charge.Certainly, also can adopt the pulse current charge of small area analysis, as preferably, this pulse duration is the 10ms cycle is 1s.
In addition, stop activating charge should considering following two aspects, first can normally work through activating charge power brick 100, at this moment, activating charge must be proceeded a period of time, to ensure that the electricity of power brick 100 is enough to be transitioned into the formal charging stage, therefore as preferred, after the power brick control module 16 of power brick 100 and power brick communication module 15 recover normally to make charger communication module 25 receive the communication information of power brick communication module 15, charger control module 26 still controls the activating charge that charging module 23 continues in Preset Time.This preset duration is preferably 10 to 30 seconds, and certainly, we also can adopt using the magnitude of voltage of power brick 100 as the triggering signal stopping activating.
Secondly, when power brick 100 breaks down, even if it also can not recover normal work through activating charge, so unrestrictedly activating charge can not be carried out, preferably, the charger control module 26 of charger detect at every turn be connected with power brick 100 after only carry out once activating charge, and each activating charge has an activationary time upper limit, such as 2 to 5 minutes.
With reference to shown in Fig. 6, power brick 100 in, if when a series unit 111 has the battery core 111a of multiple parallel connection, when one of them battery core 111a disconnects, be cannot by detecting magnitude of voltage and judge whether to have occurred disconnection fault and what break down being which series unit 111.So, when there is broken string, still carrying out charging according to original charging procedure can exist potential safety hazard.
In order to address this problem, also comprise a burn out detection module (not shown) in power brick 100, it can judge whether there is the battery core disconnected in series unit according to the magnitude of voltage of series unit.
Burn out detection module both can also can as independent of the separate functional blocks outside power brick control module as a part for power brick control module 16.
In order to realize the burn out detection to battery core, burn out detection module both can pass through the magnitude of voltage of series unit 111 and the relativeness of time, also can be detected by the change of the internal resistance value of series unit 111.
As a kind of scheme, burn out detection module comprises: timing unit, for providing time data; Slope calculation unit SCU, for calculating the slope value of the magnitude of voltage relative time of series unit; And judging unit, whether there is for judging according to the slope value of series unit the battery core disconnected in series unit.
Alternatively, burn out detection module comprises: current detecting unit, for detecting the current value of series unit; Internal resistance computing unit, in calculating the internal resistance value of series unit according to the magnitude of voltage of series unit and current value; And judging unit, whether there is for judging according to the internal resistance value of series unit the battery core disconnected in series unit.
In addition, power brick 100 and charger form one charge combine time, the burn out detection module as above in scheme can be arranged in charger, the data needed for burn out detection module can obtain when power brick 100 and charger form and be connected or signal.
In addition, when power brick 100 and a power device form an electric tool, as above the burn out detection module in scheme can be arranged in electric tool, the data needed for burn out detection module can obtain when power brick 100 and power device form and be connected or signal.The measuring equipment of power device both can be a kind of power consumption equipment with motor also can be such as laser range finder.
Certain charger and power device also should have the control module (scheming not shown) controlling this break detection circuit.
When being detected by the magnitude of voltage of series unit 111 and the relativeness of time, wire break detection method comprises: the voltage signal detecting described series unit high-pressure side; Calculate the slope value of described series unit magnitude of voltage relative time; Judge in described series unit, whether to there is the described battery core disconnected according to the slope value of described series unit.
As shown in Figure 6, during the battery core 11a that the appearance in a series unit 111 disconnects, this series unit 111 is because connecting with all the other series units 111, so be identical by their electricity, but owing to there is the battery core 11a disconnected, the slope of its voltage compared with the time is inevitable different with other normal series units 111.
In reality detects, both can by the slope value of each series unit 111 with the mean value of the slope value of all series units compared with, also can compared with the interval range of default slope value.
As a kind of preferred version, for the embodiment that a series unit 111 comprises two battery core 111a in parallel, specifically, the method comprises the steps: the method
S1: start;
S2: the initial voltage value detecting or read all series units;
S3: wait for preset duration;
S4: the final voltage value detecting all series units;
S5: with twice detection obtain the slope that magnitude of voltage calculates the voltage relative time of series unit 111 respectively;
S6: find out minimum and maximum detected slope;
S7: judge whether maximum detected slope is more than or equal to the minimum detection slope of 2 times, if then carry out step S8, then returns step S2 if not;
S8: the series unit 111, the system that mark maximum detected slope report an error, stops charging process, proceeds to step S9;
S9: terminate.
It should be noted that, concrete Rule of judgment will be determined according to concrete condition in series unit 111 in the step s 7, such as when series unit 111 has three battery core 111a in parallel, for the situation of one, broken string and two, broken string, the criterion of its slope needs further refinement.
In addition, return step S2 in step S7, step S4 is recorded the initial voltage value of final voltage value as acquisition next time of S2 step.One-time detection voltage operation can be reduced like this, reduce energy consumption.
Power brick control module is when the internal resistance value by series unit 111 detects, and wire break detection method comprises:
Detect the voltage signal of series unit 111 high-pressure side; Calculate the internal resistance value of series unit 111; Judge in series unit, whether to there is the battery core disconnected according to the internal resistance value of series unit 111.
During the battery core 11a that the appearance in a series unit 111 disconnects, this series unit 111 can be different from all the other normal series units 111 by the internal resistance value reflected.
When series unit 111 does not have electric current to pass through, detect the magnitude of voltage U1 of series unit 111 high-pressure side, now because electric current is very little, almost nil, in series unit 111, internal resistance does not have an impact, and the magnitude of voltage U1 now detected is no better than the magnitude of voltage of battery core 111a reality.
Make series unit 111 charge or discharge, size is made to be that the electric current of I is through series unit 111, now detect the magnitude of voltage U2 of series unit 111 high-pressure side, now owing to there being electric current to pass through, magnitude of voltage in series unit 111 in internal resistance is IR, suppose that U2 is less than U1, so now U1=U2+IR, the internal resistance value R in series unit 111 can be calculated according to this formula, if there is the battery core broken in series unit 111, in such as Fig. 6, in series unit 111, two battery core 111a in parallel are disconnected one, the internal resistance value R so now calculated should be approximately 2 times of all the other normal series units 111.
According to above principle, can by detecting magnitude of voltage and current value, then through calculating internal resistance value instant in series unit 111, and multilevel iudge internal resistance value whether abnormal method realizes burn out detection.
Both can carry out internal resistance value in all series units 111 during multilevel iudge internal resistance value to compare, the mean value of internal resistance value and internal resistance value is compared, judge whether to occur extremely from the amplitude of numerical fluctuations.
Also by detecting that internal resistance value compares with the number range preset, if exceed the threshold value of default number range, can think and breaking.
In these two kinds of comparative approach, the former benefit is to judge along with temperature and actual conditions change in detection of dynamic, and the latter is that data operation quantity is less, but when internal resistance changes greatly, may there is inaccurate situation.
Introduce below power brick control module a kind of can by the electric tool of the power brick 100 introduced above as energy source.
This electric tool also comprises power device 400 except comprising power brick 100.
Shown in power device 400(Fig. 8) comprising: device communication module 401, device control module 402, supply module 403, discharge protection circuit 404 and burn out detection module 405.
Device communication module 401 has a device communication terminal D ", be connected for forming communication with the power brick communication terminal D in power brick 100.
Device control module 402 control device communication module 401, supply module 403 is connected with device positive pole P+, device negative pole P-, for being connected to realize power delivery with the positive terminal B+ of power brick 100 and power brick negative terminal B-respectively.
Discharge protection circuit 404 is for the protection of the safety of battery core group when discharging, and it is connected with a unit temp terminal T ", unit temp terminal T is " for being connected with power brick temperature terminal T.Unit temp terminal T being detected, " when disconnecting with power brick temperature terminal T, or when detecting that power brick 100 temperature is too high, power device 400 makes power brick 100 stop electric discharge to discharge protection circuit 404.Specifically; produce a control signal by discharge protection circuit 404 and send to device control module 402; device control module 402 cuts off the partial circuit in power device 400; the current circuit between the positive terminal B+ of electric device and power brick 100 and power brick negative terminal B-of using of such as motor one class in power device 400 is disconnected, thus makes power brick 100 stop electric discharge.
Device control module 402 after receiving the data that power brick 100 sent by power brick communication module 15, by CRC cyclic check individual data bag correctness; If checking data is made mistakes, automatically abandon current data packet, next packet of wait-receiving mode; If after not receiving effective data packets in Preset Time, device control module 402 enters protection wait routine, stops power device 400 to run.
Device control module 402 can to power brick control module feedback data after receiving effective data packets, when power brick control module does not receive the data of the feedback of device control module 402, power brick control module continues to send packet, and detects power brick and whether power device 400 disconnects.
Device control module 402 receives sending after packet is invalid data of power brick control module 16 in judgement and starts timing, if device control module 402 receives the effective data packets sent of power brick control module 16 in the process of timing, then the timing of device control module 402 resets.
Device control module 402 enters normal working procedure after receiving effective packet.
Equally, the charger control module 26 of charger 200 also can adopt same data transmission, verification and fault-tolerance approach with the power brick control module 16 of power brick 100.
In addition, power brick 100 be connected with power device 400 power time, can judge that in order to make device control module 402 whether power brick 100 is under-voltage as early as possible, the power brick control module 16 of power brick 100 by the voltage of adjacent series unit 111 and can compare, first one less in them is selected, using all less magnitudes of voltage from selecting between two adjacent series units 111 as comparison other, then device control module is sent to judge under-voltage foundation as it voltage minimum in them.Greatly reduce volume of transmitted data like this, improve efficiency.
More than show and describe general principle of the present invention, principal character and advantage.The technical staff of the industry should understand, and above-described embodiment does not limit the present invention 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 scope of the present invention.
Claims (10)
1. a power brick, it comprises:
More than one series unit forming series connection each other;
Voltage detection module, for detecting the voltage signal of multiple described series unit high-pressure side respectively; With
Power brick control module, for receiving voltage signal that described voltage detection module detects and calculating the magnitude of voltage of described series unit;
Wherein, described series unit comprises more than one battery core, and the multiple described battery core in a described series unit is in parallel;
Described power brick control module can judge whether there is the described battery core disconnected in described series unit according to the magnitude of voltage of time data and described series unit.
2. power brick according to claim 1, is characterized in that, described power brick control module comprises:
Burn out detection module, can judge whether there is the described battery core disconnected in described series unit according to the magnitude of voltage of described series unit and the relativeness of time.
3. power brick according to claim 1, is characterized in that, described burn out detection module comprises:
Timing unit, for providing time data;
Slope calculation unit SCU, for calculating the slope value of the magnitude of voltage relative time of described series unit; With
Whether judging unit, exist for judging according to the slope value of described series unit the described battery core disconnected in described series unit.
4. a power brick, it comprises:
More than one series unit forming series connection each other;
Voltage detection module, for detecting the voltage signal of multiple described series unit high-pressure side respectively; With
Power brick control module, for receiving voltage signal that described voltage detection module detects and calculating the magnitude of voltage of described series unit;
Wherein said series unit comprises more than one battery core, and the multiple described battery core in a described series unit is in parallel;
Described power brick also comprises:
Burn out detection module, can judge whether there is the described battery core disconnected in described series unit according to the magnitude of voltage of time data and described series unit.
5. power brick according to claim 4, is characterized in that, described burn out detection module comprises:
Timing unit, for providing time data;
Slope calculation unit SCU, for calculating the slope value of the magnitude of voltage relative time of described series unit; With
Whether judging unit, exist for judging according to the slope value of described series unit the described battery core disconnected in described series unit.
6. a charging combination, comprises power brick and the charger for its charging,
Described power brick comprises: more than one series unit forming series connection each other;
Described series unit comprises plural battery core, and the multiple described battery core in a described series unit is in parallel;
Described charging combination also comprises:
Voltage detection module, for detecting the voltage signal of multiple described series unit high-pressure side respectively;
Power brick control module, for receiving voltage signal that described voltage detection module detects and calculating the magnitude of voltage of described series unit; With
Burn out detection module, can judge whether there is the described battery core disconnected in described series unit according to the magnitude of voltage of described series unit.
7. charge according to claim 6 combination, it is characterized in that, described burn out detection module comprises:
Timing unit, for providing time data;
Slope calculation unit SCU, for calculating the slope value of the magnitude of voltage relative time of described series unit; With
Whether judging unit, exist for judging according to the slope value of described series unit the described battery core disconnected in described series unit.
8. comprise an electric tool for power device and power brick, described power brick can be powered for described power device, and described power brick comprises the series unit that more than forms series connection each other; Described series unit comprises plural battery core, and the multiple described battery core in a described series unit is in parallel;
Described electric tool and also comprising:
Voltage detection module, for detecting the voltage signal of multiple described series unit high-pressure side respectively;
Power brick control module, for receiving voltage signal that described voltage detection module detects and calculating the magnitude of voltage of described series unit; With
Burn out detection module, can judge whether there is the described battery core disconnected in described series unit according to the magnitude of voltage of described series unit.
9. electric tool according to claim 8, is characterized in that, described burn out detection module comprises: timing unit, for providing time data;
Slope calculation unit SCU, for calculating the slope value of the magnitude of voltage relative time of described series unit; With
Whether judging unit, exist for judging according to the slope value of described series unit the described battery core disconnected in described series unit.
10. a wire break detection method, whether disconnect for the circuit detected between battery core in parallel in power brick, described power brick comprises the series unit that more than forms series connection each other, and described tandem compound comprises the battery core of two or more parallel connection; Described detection method comprises:
Detect the voltage signal of described tandem compound high-pressure side;
Calculate the slope value of described tandem compound magnitude of voltage relative time;
Judge in described series unit, whether to there is the described battery core disconnected according to the slope value of described tandem compound.
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| CN201410841937.1A CN104753127B (en) | 2013-12-31 | 2014-12-30 | Battery bag, charging combination, electric tool and wire break detection method |
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| CN201410841937.1A Active CN104753127B (en) | 2013-12-31 | 2014-12-30 | Battery bag, charging combination, electric tool and wire break detection method |
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Also Published As
| Publication number | Publication date |
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| CN104753126A (en) | 2015-07-01 |
| CN104753128A (en) | 2015-07-01 |
| CN104753129B (en) | 2018-01-19 |
| CN104753126B (en) | 2017-08-29 |
| CN104753127B (en) | 2017-12-29 |
| CN104753129A (en) | 2015-07-01 |
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