CN201289888Y - Battery group charger - Google Patents
Battery group charger Download PDFInfo
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- CN201289888Y CN201289888Y CNU2008202073882U CN200820207388U CN201289888Y CN 201289888 Y CN201289888 Y CN 201289888Y CN U2008202073882 U CNU2008202073882 U CN U2008202073882U CN 200820207388 U CN200820207388 U CN 200820207388U CN 201289888 Y CN201289888 Y CN 201289888Y
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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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Abstract
The utility model provides a group charger for detecting the information relevant to a battery pack, determining proper charge mode based on the detected information, and providing the charge mode to the battery pack. The group charger includes a first terminal used for connecting the battery pack, a second terminal used for connecting the battery pack, a microprocessor, which can be operationally connected to the terminals, is structurally designed to receive a signal of the battery pack which is connected with the terminal from at least one terminal, controls the charger to select one charge mode according to the signal, and provides the charge mode to the battery pack.
Description
Technical field
The utility model relates generally to the charging device into batteries charging, for example, has the charging device of the power tool battery group of number of chemical composition and plug construction.
Background technology
When using in remote or other inaccessible area, portable power tool relies on battery pack power is provided.The battery pack that is used for electric tool may have compact design, with size and the volume that reduces entire tool, and may have higher energy storage capacity, so that longer remote instrument use/discharge time.In order under the size of minimum and weight, to obtain higher power, energy storage and recharge capacity, traditional battery pack may comprise lithium ion (Li-Ion), nickel hydroxide/cadmium (NiCad), and nickle/metal hydrides (NiMH) chemical composition.Based on their intended purpose, battery pack may comprise multiple other unique physical characteristic and shape.
Similarly, traditional group charger exists, and with on the basis of the application that depends on battery, gives the battery recharge of the specific type with multiple structure.Traditional group charger be configured to usually can with special conventional batteries compatibility, as mentioned above, according to their application, it has multiple physical characteristic.Traditional group charger may only be given the batteries charging with specific physical form, chemical property, adapter structure, electronic equipment and/or other electric properties of battery unit.Traditional group charger can not or can not correctly charge to the batteries charging that do not satisfy indivedual charger specific criteria needs.
Therefore, traditional group charger has the feature with the particular battery coupling that will be recharged usually, and incompatible with the battery that does not have these special characteristics, to reduce cost and complexity.This charger may include only can be to the element of particular battery charging; For example, charger may can provide single current type, corresponding to the single type of the battery that will use in charger.In addition, traditional possible battery with a type of battery pack correctly interacts; For example, charger is possible can only determine to charge in a kind of battery of predefined type/and recharge and finish.
Because traditional group charger is configured to the battery charge of single type,, may produce undesired consequences if inappropriate battery types is electrically connected to traditional charger.Therefore traditional group charger generally includes and determines that whether the battery that connects is the mechanism of suitable type.If battery pack does not have the proper characteristics of designated groups, traditional battery charger may not be this inappropriate battery charge, or with this inappropriate battery otherwise interaction is not arranged.
Similarly be used for can not be compatible charger and the locking mechanism of battery can be used to electric tool, wherein a plurality of batteries are used to a plurality of remote tool usings; Yet it also may be difficult making a plurality of batteries with appropriate characteristics of determining group and suitable conventional batteries charger matched.
The utility model content
The purpose of this utility model just provides a kind of group charger that can overcome above-mentioned shortcoming.
Example embodiment of the present utility model comprises group charger, and it can give the batteries charging with multiple physical characteristic and chemical characteristic, and this battery pack comprises the lithium ion battery with higher charge/weight ratio.Example battery group charger can comprise the characteristic that is used for definite battery pack that will be recharged, and gives the mechanism of batteries charging based on these characteristics.The example battery set type determines that mechanism comprises the electrical characteristics transducer, and particular terminal engages, and/or the battery charger co-operating member.
According to an embodiment of the present utility model, provide a kind of battery charger.This charger can comprise: the first terminal that is used to connect battery pack; Be used to connect second terminal of battery pack; Microprocessor, it is operably connected to this terminal, and is configured to receive signal about the battery pack that is connected to this terminal from least one terminal, and according to this signal controlling charger to select and to provide a kind of charging modes to battery pack.
According to another embodiment of the present utility model, provide a kind of battery charger.This charger provides a triggering signal to charging terminal; Monitoring is at the maximum of triggering signal and the terminal voltage at minimum value place; Determine difference at the terminal voltage at the maximum of triggering signal and minimum value place; The difference and the predetermined threshold of terminal voltage are compared, if the difference of terminal voltage less than this predetermined threshold, detects the type of the battery pack that is connected to terminal so; And provide charging modes according to the type of the battery pack that detects.
According to another embodiment of the present utility model, provide a kind of battery charger.This charger is after being electrically connected to charger with battery pack; Detection is about the information of this battery pack; Determine suitable charging modes based on the information of this detection; And this charging modes offered battery pack.
According to another embodiment of the present utility model, a kind of battery charger is provided, this charger comprises non-charging terminal, it is connected to microprocessor, and be configured to from the battery pack received signal, wherein non-charging terminal does not provide power with to batteries charging to battery pack, and wherein signal is following any at least a: digital signal, analog signal, voltage and current.Wherein signal comprises about following any data: offer the maximum current of battery pack, provide the time span of electric current to battery pack, and the charging complement mark, the electric current that offers battery pack changes, and the change in voltage that offers battery pack.
According to another embodiment of the present utility model, a kind of battery charger is provided, this charger further comprises voltage detection mechanism, it is connected to the first terminal and second terminal, and be configured to respond to voltage between the terminal, wherein charger is configured to stop to provide electric current to battery pack when induced voltage reduces.Wherein microprocessor is configured to control charger and sends triggering signal to the battery pack that is connected to charger, triggering signal is in potential pulse and the current impulse, triggering signal is a square voltage pulse substantially, it has about 3 volts maximum voltage and about 0 volt minimum voltage, and with the rate loop of about per second one-period.
According to another embodiment of the present utility model, a kind of battery charger is provided, this battery charger further comprises a transducer, be used to respond to terminal voltage at the minimum and maximum voltage place of signal, wherein microprocessor is configured to control charger provides pre-charge current to terminal, stop to provide pre-charge current then, and monitoring is from the feedback of battery pack, and provide charging modes to terminal based on feedback from battery pack, charging modes comprises if first charging modes of battery pack in the low-voltage condition, and changes to second charging modes when battery pack becomes the part charging.
According to another embodiment of the present utility model, a kind of battery charger is provided, this charger further comprises at least one additional terminal, and signal comprises such information, it comprises which terminal is engaged by battery pack, and charging modes based on which terminal is engaged by battery pack at least in part.
According to another embodiment of the present utility model, a kind of battery charger is provided, this charger further comprises the affirmation circuit, it is connected to microprocessor, confirm that wherein circuit reads the voltage relevant with battery pack, and based on this voltage that reads, microprocessor is programmed the control charger provides charging modes to battery pack.If wherein read voltage is about 2.2 to about 2.4 volts, it is that lithium ion battery provides a kind of charging modes that microprocessor is programmed with the control charger, if read voltage is about 0.5 to about 1.8 volts, for nickel-cadmium cell provides a kind of charging modes, if and to read voltage be except about 2.2 to about 2.4 volts and about 0.5 other voltages to about 1.8 volts, no charging modes.
Example battery group charger also can comprise the parts that prevent to damage and consume (wear) when giving polytype batteries charging.Example damage-minimizing parts comprise the voltage decline transducer that is used to measure the battery existence.
Above-mentioned and the further feature of example embodiment that comprises the combination of the various new details of structure and part will be described with reference to the accompanying drawings in more detail.To understand, the details of example embodiment with shown in the mode of example, is not the restriction as example embodiment just.Under the situation that does not break away from spirit and scope of the present utility model, principle of the present utility model and feature will be used among multiple and a large amount of embodiment.
Advantage of the present utility model is, can overcome the shortcoming of existing charger, can charge to multiple battery, detects battery variety automatically and suitable charging modes is provided.
Description of drawings
Fig. 1 and 2 is the axonometric drawing of example embodiment group charger;
Fig. 3 is to use the terminal of replacement (alternate) that the example battery group of correct batteries charging is provided;
Fig. 4 is to use the terminal of replacement that the example battery group charger of correct batteries charging is provided;
Fig. 5 is the end view that the example terminal of the battery of the first kind and example battery group charger engages;
Fig. 6 is the end view that the example terminal of the example battery group charger of the battery of second type and Fig. 5 engages;
Fig. 6 A is the end view that engages that example is replaced charging terminal and the battery terminal of replacement;
The axonometric drawing that Fig. 7 is to use the compound terminal of the example of replacing terminal to engage;
Fig. 8 is the end view of the example terminal of Fig. 7;
Fig. 9 is based on the plane graph that battery data is determined the exemplary circuit of suitable charging;
Figure 10 is the chart of explanation corresponding to the exemplary types of the voltage range of different charging modes;
Figure 11 is example voltages scope and the voltage falling waveform figure in the exemplary charge device;
Figure 12 is the flow chart to batteries charging;
But Figure 13 is the example waveform figure of usage example charger.
Embodiment
Following description provides example embodiment, and is not intended to use or the SC service ceiling system disclosure.Should be appreciated that, in institute's drawings attached, corresponding reference marker representation class like or corresponding part and feature.
As shown in Fig. 1 and 2, example embodiment group charger 1 can be configured to insertion battery pack 2 wherein or that be connected to it power is provided.Charger 1 comprises power supply and/or is connected to the electric connector 3 of conventional power source outlet that by it, power can be passed to battery pack 2.
The polytype of battery pack 2 and generation can appear at the three unities, and portable power tool is used and charges there, and a plurality of charger 3 can be used for to each instrument charging.The example embodiment that describes below comprises the feature that allows the multiple battery type and charged by a single charger from generation to generation.
I. the example embodiment of describing among Fig. 3-6:
The battery pack example embodiment and the charger example embodiment of a tower shape of Fig. 3-5 expression, it comprises the charge path by the battery types decision.The charger of other shape comprises the rail-like charger, can be used as example embodiment, and tower shape battery and charger are just as an example of this structure.
As shown in Figure 3, example tower shape battery 100 comprises a plurality of terminals 120, and it is electrically connected to the exemplary charge device with battery.Terminal can be multiple structure, for example, when earth terminal 122 with battery electron element ground connection, provide exchanges data, and/or when in addition battery being connected to charger, positive and negative terminal 123 and 121 can provide electrical connection.
Fig. 4 shows an example tower shape charger, and the battery pack of Fig. 3 can be inserted into wherein charging.Because example battery group 100 can have number of chemical character, charging interval, electricity needs, and/or other physical characteristic, exemplary charge device 200 can provide unique charging current, voltage based on the cell types of inserting, charging interval, and/or other charge characteristic (hereinafter " charging modes ").
The exemplary charge device determines that for the battery that inserts charger a kind of of correct charging modes is to provide different charge paths for dissimilar batteries.Battery with different chemical character, for example lithium ion battery and nickle/metal hydrides battery can have different profiles and/or terminal structure.Therefore exemplary charge device 200 can provide different terminals, the battery types that its coupling is specific, and charging modes with the sort of type matching is provided.
As shown in Figure 3, terminal 120 can be provided at an end of the tower 125 of example battery 100.The physical positioning of terminal 120 can be disposed on the battery, is used for setting up and being connected of charger based on the particular battery that is recharged.For example, terminal 120 can have a specific space or position on the presumptive area of battery 100, each shown on the end of tower 125, it has reflected battery types, and forms between battery pack and charger and connect, and is used for specific battery types.
Especially, terminal itself also may be configured for specific battery types.And the terminal 120 of example battery 100 can be different substantially with the terminal of other battery types of the different charging modes of needs.Therefore, set up the terminal combination that is electrically connected by using a kind of with suitable battery, example battery can conductively-closed.
Arrange though a kind of tulip shape terminal has been shown in example embodiment, also can use the terminal structure of other type consistent with the utility model.
As shown in Figure 5, by having the charging terminal in groups 210 of the battery that only is electrically connected particular type, the exemplary charge device can be treated various battery types with a certain discrimination.The charging modes that is provided by terminal 210 can only mate the required mode of other battery that engages fully with the terminal shown in Fig. 5.For example, the voltage on the terminal 210 can only mate the required voltage of other battery types with the terminal that engages fully with terminal 210.The alternate manner matching properties comprises for example charging interval and maximum current, can only be offered terminal 210.
As shown in Figure 5, charger can comprise unique charging terminal as the arrangement of tulip (tulip) shape.When other battery is inserted into exemplary charge device 200, other battery terminal 123 ' with 121 ' can be connected with tulip (tulip) shape charging terminal 210.If opposite, example battery 100 is inserted into the exemplary charge device, rather than engages fully with charging terminal 210 as other battery types shown in Fig. 5, and positive and negative terminal 121 will not be connected with charging terminal 210 with 123, as shown in Figure 6.
Fig. 6 A shows the replacement charging terminal 220 in the exemplary charge device 200, and it also engages with replacement battery terminal 130 alinements.Replace charging modes that charging terminal 220 can provide different uniqueness to having the example battery 200 of replacing battery terminal 130, wherein replace battery terminal 130 and engage with replacement terminal 220.Have the terminal 123 of complete splice terminal 210 ' and 121 ' other battery can be not engage with replacement terminal 220 in the exemplary charge device, therefore, may not be electrically connected with replacement charging terminal 220.
By these the different terminals 210 and 220 in the same exemplary charge device, which terminal different charging modes contacts based on battery, can be provided for dissimilar batteries.Therefore, have the battery of different terminal structures,, in same exemplary charge device 200, also can differently be charged based on the shape and the structure of terminal even have basic similarly overall shape.
For example, lithium ion battery may have shorter terminal and additional styletable than nickel-cadmium cell, but these two batteries may have essentially identical shape, and can be used in the identical instrument.Therefore the exemplary charge device may engage with nickel-cadmium cell by first group of terminal, and when charging is finished on the basis of typical NI-G change in voltage definite the charging finish.Lithium ion battery may be inserted into same charger, yet engages one group of different terminals, and is charged in a different manner.Therefore, the lithium ion battery with nickel-cadmium cell has a great difference charging demand can successfully be charged in same exemplary charge device, and can not be damaged battery.
II. the example embodiment of describing among Fig. 7-8:
Other exemplary charge device can comprise the terminal of colocated, and its length that depends on battery terminal provides the charge path of replacement, and does not rely on terminal additional or the replacement location.
As shown in Fig. 7 and 8, colocated terminal 311 and 312 can provide the charge path of replacement based on the length of the battery terminal that inserts those terminals.Negative terminal 310 can be as the public negative terminal of all batteries that insert the exemplary charge device.First plus end 311 can have the length of the instrument terminal that is configured to engage some types, and second plus end 312 can only engage the subclass of the instrument terminal of those types.That is to say that the second short terminal 312 may only engage the instrument with longer terminal, and terminal 311 may engage and both had the instrument that longer terminal has shorter terminal.
Because the plus end of colocated 311 and 312 combine, engage dissimilar instrument terminals, terminal 311 may provide different charging modes with 312, and therefore different charging means depends on the length of terminal.For example, if having as shown in Figure 5 terminal 123 ' and 121 ' instrument be inserted into example terminal 311 and 312 in Fig. 7 and 8, plus end 311 and 312 is all with the joining tool terminal.Replacedly, if having as shown in Figure 6 terminal 123 and 121 instrument be inserted into, have only the long plus end 311 can the joining tool terminal.
Long with short collaborative terminal 311 can provide different charging modes with 312, and therefore, based on their terminal length, dissimilar chargings can be delivered to instrument.As previously mentioned, charging modes may comprise voltage characteristic, maximum current, and the charging interval, resistance detection, detection is finished in charging, and/or any other charge characteristic of individual cell group.If two terminals 311 and 312 are engaged by long battery terminals (for example 121 among Fig. 5 '), two terminals all provide charging, so that their combined charge provides different charging modes to long terminal battery.Replacedly, the exemplary charge device can have other known circuit of logic OR, only to allow the charging modes of a terminal transmission replacement in 311 and 312, if two terminals 311 and 312 are engaged.
For example, have only long plus end 311 can engage lithium ion battery, because the battery of these types has than NI-G or the short terminal of nickle/metal hydrides battery.When having only long plus end 311 to be engaged, that terminal only provides by the required electric current of lithium ion battery, voltage and other charge characteristic.312 of short terminals may with NI-G or nickle/metal hydrides battery engagement.Therefore, if two terminals 311 and 312 are engaged, they provide together or individually only by NI-G or the required charge characteristic of nickle/metal hydrides battery pack.
In the same structure identification in still obtaining the exemplary charge device, above-mentioned example structure has several variations.For example, the terminal of any amount of replacement location can be used to engage uniquely and give any amount of battery charge, and each has the charging demand and the terminal structure of a uniqueness.Perhaps, for example, some terminals can be public in all battery types, determines charging modes with unshared terminal.For example, public negative power source terminal can be in the exemplary charge device, and the battery of all connections can obtain, and is obtainable to specific battery only and have the different plus end of replacing charging modes, wherein the charge characteristic of this particular battery coupling plus end.
Similarly, any amount of known variant can be used to obtain the terminal joint of replacement between dissimilar batteries.For example, the exemplary charge device can have difform opening or stop portions, and it allows one type battery to engage with one group of terminal, and prevents to have the battery of other type of other shape and identical terminal joint.Further, any amount of known terminal shape and charging modes can be used to the exemplary charge device successfully is connected to example battery.
III. the example embodiment of describing among Fig. 9-10:
The second kind of exemplary charge device mechanism that is used for determining battery pack structure and the charging modes of coupling is provided can comprise by measuring the electrical properties of the battery that inserts, come the electrical properties of definite battery that inserts.The general terminal of these example structure to being engaged by all battery types to disclosed replacement terminal in foregoing example embodiment, may be useful perhaps.
Example battery can comprise non-charging terminal, and it provides the battery information that can be read by the exemplary charge device.For example, the terminal 122 among Fig. 3 may be a non-charging terminal, and it can provide battery types information.From these structures, the exemplary charge device can be discerned different battery types, and provides correct charging modes to the battery that inserts.
As shown in Figure 9, be used to provide a kind of exemplary mechanism of battery information may relate to a thermistor and/or resistor 510, it is electrically connected to the non-charging terminal in the battery.Example resistor 510 provides a voltage range for given electric current, and it is unique to battery types.Example battery group charger can be electrically connected resistors 510 by connector 520, and voltage can be identified circuit 530 and reads.Read based on this, microprocessor 540 can make circuit for the battery of voltage range with measurement corresponding to correct charging modes.If do not have voltage or undefined voltage range measured, as a security mechanism, microprocessor may not continue charging.
By the exemplary circuit of describing among Fig. 9, different charging modes can be associated with the specific electrical resistance of cells known type.For example, as shown in Figure 10, first impedance can be related with lithium ion battery, and lithium ion battery will produce known first voltage range 600 in the exemplary charge device, and wherein the exemplary charge device is electrically connected to the non-charging terminal of battery.In case the exemplary charge device detects first voltage range 600, being recharged device corresponding to the charging modes of lithium ion battery provides.Second impedance can be related with nickel-cadmium cell, and nickel-cadmium cell will produce the second known voltage range 610 in same exemplary charge device.When the exemplary charge device detected second voltage range 610, being recharged device corresponding to the charging modes of nickel-cadmium cell provided.
Though described example embodiment about the characteristic impedance relevant with particular battery and charging modes in Fig. 9-10, several other characteristics and measurement also can be used to discern battery types in the exemplary charge device.For example, non-charging terminal can provide the digital signal that can be read by the microprocessor of exemplary charge device.This numerical data can comprise the battery types that can be read by microprocessor, and is used to determine suitable charging modes.Known analog signal, voltage, electric current and/or any other data transmission type can be used to transmit battery types to the exemplary charge device, and allow charger to select correct charging modes, comprise, for example, maximum current, charging interval, charging complement mark, electric current and change in voltage, and/or any other charge characteristic.
IV. the example embodiment of describing among Figure 11:
Example embodiment can further provide circuit and charging modes, is used for preventing to having low or not having the damage of the example battery charger of open circuit voltage.The exemplary charge device may not have open circuit voltage; That is, when not having battery pack to insert, the voltage potential between the charging terminal is near zero.As shown in Figure 11, V
OC(open circuit voltage) may be zero volt, and the voltage of battery terminal may measured De Genggao (V
B).By using traditional voltage measuring apparatus, have only when between charging terminal, measuring the non-zero voltage electromotive force, the exemplary charge device can begin charging.For example, when voltage raise also pilot cell insertion, the exemplary charge device can be at its moment T
iAfter begin soon the charging.
As shown in Figure 11, however the exemplary charge device may be at V
OCAnd V
BBetween jump, as a step function; But because the existence of the capacitor in example battery and the charger, change in voltage is a chain index.Therefore, when battery at moment T
wWhen being removed, voltage potential is not immediately near zero or V
OCIf the exemplary charge device is at any V that is higher than
OCVoltage be activated, so the exemplary charge device at battery at T
wTo continue transmitted power when being removed, this may damage the assembly of exemplary charge device.
In order to prevent to push the assembly of exemplary charge device, the exemplary charge device can comprise further voltage detection mechanism, for example microprocessor or voltage microcontroller, and its induced voltage increases rather than voltage V
OCWhen voltage at first begins to reduce, at T
wAfter soon, rather than near T
I2, it may lag behind T far away
w, charging can be stopped by microcontroller.
For example, if battery pack is charged in the exemplary charge device, and the voltage on the charging terminal is V
B, the exemplary charge device can continue to transmit charge power so, and voltage is still at V
BWhen battery pack at T
wWhen being removed, voltage begins to reduce immediately, and the exemplary charge device is responded to this reduction and stopped charge power.Therefore the exemplary charge device can be before terminal voltage be near zero, and before cell device is damaged, stops to transmit charge power.
V. the example embodiment of describing among Figure 12-13:
As what discuss in the top example embodiment in front, the exemplary charge device may not have open circuit voltage; That is, when not having battery pack to be inserted into, the voltage potential between the charging terminal may be near zero.
Battery in some types of back of discharging fully may have near zero terminal voltage.For example, nickel-cadmium cell may have very low voltage on the terminal of discharge back at it fully, if perhaps lithium ion battery damages or may have very low voltage on the terminal of non-operating state at it.Owing to terminal voltage all very low in discharge battery group and exemplary charge device, battery exists and charging modes is determined to need another mechanism to determine the existence of low-voltage battery.
The exemplary charge device can comprise circuit and relevant charging modes, even the battery pack of inserting has low terminal voltage or no-terminal voltage, it can determine that also battery exists.
As shown in Figure 12, exist in order to determine battery, the exemplary charge device can be carried out a kind of by way of example.By way of example is included in step S100 triggering signal is provided on charger terminal.This triggering signal may be voltage or the current impulse that is enough to produce any amplitude of electroresponse in the battery pack that may insert, and can not damage those battery pack.
For example, as shown in Figure 13, triggering signal can be a square voltage pulse.Example pulse shown in Figure 13 has about 3 volts maximum voltage and about 0 volt minimum voltage.Example pulse among Figure 13 is provided about .5 second, does not have voltage to be provided about .5 then, so that the circulation of whole triggering signal per second.The pulse of using in the by way of example needs not to be rectangle as shown in Figure 13, but can be multiple waveform, comprises zigzag and/or multistage shape, depends on the cell types that will be identified.
As shown in Figure 12 and 13, after S100 is provided triggering signal, at the terminal voltage of step S120 group charger measurement at the minimum and maximum place of signal.For example, as shown in Figure 13, but the charger energy measurement is at the terminal voltage at Tmax and Tmin place, to measure the voltage at the minimum and maximum place of signal.If in by way of example, use other impulse form, can use other Measuring Time, minimum and maximum with measuring-signal.
At step S140, the exemplary charge device can be determined the voltage difference on Tmax and Tmin place terminal then.Then at step S150, this difference by with no battery pack threshold ratio.This no battery pack threshold value may be, for example, when having only air or different non-battery materials between the terminal and potential pulse when being provided on the charger terminal, corresponding to the threshold value of the voltage difference between the terminal from charger.Because different impedances, this threshold value will be higher than the voltage of measuring usually far away when conductor or battery are connected between the terminal.This threshold value can be come comparison by any known way in the prior art, comprises analog circuit or the digital circuit by the microprocessor in the example battery.
If the voltage difference of determining in step S140 is higher than the no battery pack threshold value that compares in step S150, can determines not have battery to exist at step S160 charger, and continue to provide triggering signal, up to detecting battery.That is to say, step S100, S120, S140, S150 and S160 can be repeated, as long as the voltage that detects is higher than threshold value, thereby do not have battery to be detected.
If voltage difference is lower than no battery voltage threshold value, the exemplary charge device determines to exist battery pack so.By way of example can comprise that the battery pack type that continues among the step S170 detects so.Battery pack type detects and can be performed by aforementioned any example embodiment; That is, the example embodiment charger construction that is used for discerning based on battery pack type can be used in step S170.For example, different terminal positions, the characteristic battery impedance, and/or the existence of Hall element will be determined in step S170.Determine that based on these battery pack can the type based on them be recharged or precharge in step S190.
In addition, based on the result of step S150 and step S170, in step S190, charger can show an error message.For example, if other battery types testing agency determines that battery is a lithium ion battery, but initially do not have voltage on the lithium ion terminal, charger may show an error message, because the lithium ion chemical characteristic of correct effect can not have zero-voltage state.
Except aforementioned structure and the mode that is used for determining battery types, step S175 has illustrated the another kind of mode of determining battery types under the low pressure condition.In case having proceeded to by step S150, charger determines that battery pack exists and is in low-voltage state that the exemplary charge device can provide longer charging current to battery in step S175.This precharge and the particular type of battery of charging fully are in a ratio of short period and/or amplitude, but power supply may be enough to the electronic component in the battery that inserts.For example, the exemplary charge device can provide complete charging current to battery about 4 seconds, stops 6 seconds then, determines the response from battery simultaneously.
Battery can comprise, for example, can be connected to the microchip of exemplary charge device communicatedly.This microchip may not be communicated by letter with the exemplary charge device when the low-voltage condition, and the precharge of step S175 may give those microchips power supplies, thereby makes charger to determine battery types based on the characteristic of microchip.By step S175, before reality charging beginning, thereby the exemplary charge device can be determined battery types and suitable charging modes in low-voltage state in battery pack.
In case battery pack is determined at step S170 and/or S175, the result that the exemplary charge device can be determined based on battery types and the voltage status of battery provide suitable charging, precharge or error message.For example, even the battery of some types can normally be charged in low-voltage state, and other batteries may have the special precharge mode of the low-voltage state of being applicable to.By way of example shown in Figure 12 allows the exemplary charge device to discern like this, and provides suitable charging modes to the battery that is in the low-voltage condition.
Each of the foregoing description can be used singly or in combination, and can charge with same exemplary charge device with the battery pack that allows to have different charge characteristics and demand.
The cross reference of related application
The application requires the U.S. Provisional Patent Application 60/945187 of the exercise question of application on June 20th, 2007 for " group charger ", and the exercise question of application on July 13rd, 2007 is the priority of the U.S. Provisional Patent Application 60/949603 of " group charger and charging modes ", it is disclosed in this by all combinations, as a reference.
Claims (7)
1. a battery charger is characterized in that, comprising:
The first terminal is used to connect battery pack;
Second terminal is used to connect battery pack;
Microprocessor, it is connected to terminal, and is configured to receive signal about the battery pack that is connected to terminal from least one terminal, and selects and provide a kind of charging modes to battery pack according to this signal controlling charger.
2. battery charger according to claim 1 is characterized in that, comprises non-charging terminal, and it is connected to microprocessor, and is configured to from the battery pack received signal.
3. battery charger according to claim 1 is characterized in that, further comprises the affirmation circuit, and it is connected to microprocessor.
4. battery charger according to claim 1 is characterized in that, further comprises voltage detection mechanism, and it is connected to the first terminal and second terminal, and is configured to respond to the voltage between the terminal.
5. battery charger according to claim 1 is characterized in that, wherein microprocessor is configured to control charger and sends triggering signal to the battery pack that is connected to charger.
6. battery charger according to claim 5 is characterized in that, further comprises a transducer, is used to respond to the terminal voltage at the minimum and maximum voltage place of signal.
7. battery charger according to claim 1 is characterized in that, further comprises at least one additional terminal.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US94518707P | 2007-06-20 | 2007-06-20 | |
| US60/945,187 | 2007-06-20 | ||
| US60/949,603 | 2007-07-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201289888Y true CN201289888Y (en) | 2009-08-12 |
Family
ID=40981570
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008202073882U Expired - Fee Related CN201289888Y (en) | 2007-06-20 | 2008-06-20 | Battery group charger |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20210273474A1 (en) * | 2018-06-27 | 2021-09-02 | Robert Bosch Gmbh | Method for charging battery packs for power tools and charging device for carrying out the method |
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2008
- 2008-06-20 CN CNU2008202073882U patent/CN201289888Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20210273474A1 (en) * | 2018-06-27 | 2021-09-02 | Robert Bosch Gmbh | Method for charging battery packs for power tools and charging device for carrying out the method |
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