CN103036292A - Method for charging rechargeable battery and charger device - Google Patents
Method for charging rechargeable battery and charger device Download PDFInfo
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- CN103036292A CN103036292A CN2012105466901A CN201210546690A CN103036292A CN 103036292 A CN103036292 A CN 103036292A CN 2012105466901 A CN2012105466901 A CN 2012105466901A CN 201210546690 A CN201210546690 A CN 201210546690A CN 103036292 A CN103036292 A CN 103036292A
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Abstract
Disclosed is a charger device. The charger device includes a housing, defining a volume, that includes a power conversion module to provide output power of between 3-300W, and a controller configuredto determine a current level to direct to one or more rechargeable batteries, and cause the output power to be directed to the one or more rechargeable batteries at a charging current substantially equal to the determined current level. A ratio of the output power directed to the one or more rechargeable batteries and the volume is equal to at least 10W/in<3>.
Description
The application is that application number is 200880009981.9, international filing date is on March 25th, 2008, denomination of invention is divided an application for the application for a patent for invention of " lithium iron phosphate ultra fast battery charger ".
Technical field
The present invention relates to method and charger apparatus to the rechargeable battery charging.
Background technology
It is to charge in constant voltage/constant current (CV/CC) source of for example 4.2V that rechargeable battery uses alternating voltage usually.When initial battery used constant current (, with the CC pattern) charging until reach the alternation point and (for example, 4.2V), switch to constant-voltage mode at this some place charger and remain on basically about alternating voltage with the voltage with the terminal place of rechargeable battery.Obtaining the required charging interval of 90% to 100% capacity is generally 2 hours to 4 hours, and wherein the CC stage is about 40 minutes in that the 1C charge rate charge rate of the charging current level that can charge battery complete (that is, corresponding to) is lower in one hour.In general, when the CC stage finished, rechargeable battery can obtain 60% to 70% charge level into the battery charging capacity.The CV stage of charging process generally needs to finish with 1 hour to 3 hours.During this period, the charging current level can reduce, and usually can reach the level corresponding to the charge rate of 0.1C when charging process finishes.
A kind of factor of the charging convenience of restriction rechargeable battery is to make charger and/or the overheated danger of battery.This type of overheated charger and/or battery of damaging, and can cause potential safety hazard.Therefore, the normal charge device is configured to apply the charging current corresponding to the charge rate of about 1C.For fear of overheating conditions occurs, sometimes the serviceability temperature transducer is monitored the temperature of charger and/or battery, therefore can make charger when detecting overheating conditions, take to correct or prevention action (for example, if the temperature of battery surpasses for example 45 ℃ margin of safety, then stopping charging current).
Summary of the invention
The invention discloses a kind of charger, this charger is configured in about 4 minutes to 6 minutes rechargeable battery charged to about 90% to 95% capacity.
In one aspect, be used for the method for rechargeable battery charging is comprised: determine to be applied to the levels of current on the rechargeable battery, so that battery has the pre-determined charge that reaches in the charging interval section between 4 to 6 minutes, to have basically that the charging current of determined approximately levels of current is applied on the battery, and after having passed through the charging interval section that is substantially equal to special time period, stop charging current.
It below is the embodiment in the scope in this regard.
The method is included in the predetermined voltage level at the terminal place that reaches rechargeable battery and periodically regulates charging current afterwards, so that the voltage between the terminal of rechargeable battery is remained on predetermined voltage level.The method comprises: when the predetermined voltage level at the terminal place that reaches rechargeable battery, the output indicator device is activated.The pre-determined charge of battery unit be rechargeable battery charging capacity at least 80%, and wherein the charging interval section is about 3 to 4 minutes.The pre-determined charge of rechargeable battery be rechargeable battery charging capacity at least 90%, and wherein the charging interval section is about 5 minutes.The method comprises the temperature that applies charging current and do not monitor rechargeable battery.Apply the electric current that charging current comprises that adjusting is provided by the power conversion module with voltage transformer part.The electric current that adjusting is provided by power conversion module comprises the operation of regulation voltage transformer portion.Determine to be applied to levels of current on the rechargeable battery comprise determine to be applied to chargeable based on the levels of current on the battery of LiFePO4.
On the other hand, be used for the charger apparatus of one or more rechargeable battery chargings is comprised: the container and the controller that are used for admitting one or more rechargeable batteries, this container has electric contact, described electric contact is configured to be coupled to the separately terminal of one or more rechargeable batteries, described controller is configured to determine will be applied to the levels of current on one or more rechargeable batteries so that one or more battery has the pre-determined charge that reaches in the charging interval section between 4 to 6 minutes, to have basically that the charging current of determined approximately levels of current is applied on one or more rechargeable batteries, and after having passed through the charging interval section that is substantially equal to special time period, stop charging current.
It below is the embodiment in the scope in this regard.
The pre-determined charge of one or more batteries be one or more battery units charging capacity at least 80%, and wherein the charging interval section approximately between 3 to 15 minutes.The pre-determined charge of one or more rechargeable batteries is charging capacity about 80% of one or more batteries, and wherein the charging interval section approximately between 3 minutes to 4 minutes.The pre-determined charge of one or more rechargeable batteries be one or more batteries charging capacity at least 90% to 95%, and wherein the fixed time section is about 5 minutes.This device comprises power conversion module, and this power conversion module comprises voltage transformer.This device comprises feedback control strategies, so that controller is regulated the electric current by power conversion module output.Feedback control strategies is configured to the operation of regulation voltage transformer.The voltage that feedback control strategies is configured at one or more batteries place reaches after the predetermined upper voltage limit level, and the voltage at the terminal place of one or more rechargeable batteries is remained on predetermined upper voltage limit.This device comprises the output indicator device, and its middle controller is configured to make when the predetermined voltage level at the terminal place that reaches rechargeable battery the output indicator device to start.This device comprises mosfet transistor base synchronous rectifier.It is one or more based on the levels of current on the rechargeable battery of LiFePO4 that controller is configured to determine to be applied to.Controller comprises the microcontroller based on processor.The controller that is configured to apply charging current is configured to apply charging current and the temperature of not monitoring one or more rechargeable batteries.
On the other hand, a kind of charger apparatus comprises: electric contact, described electric contact are configured to be coupled to the separately terminal of one or more rechargeable batteries; Circuit, described circuit come to reach the constant voltage that keeps when being scheduled to upper voltage limit on one or more batteries to the charging of one or more batteries and when the voltage of one or more batteries by constant charge current being applied to one or more rechargeable batteries when charging operations begins; With the controller that is configured to control this circuit, this controller be configured to make this circuit with the battery charging between 4 to 6 minutes the charging interval section and stop thereafter charging to battery.
On the other hand, a kind of charger apparatus comprises: electric contact, described electric contact are configured to be coupled to the separately terminal of one or more rechargeable batteries; The circuit that as follows one or more batteries is charged: measure the existing charge volume in the battery, determine to apply the time period of charging current, when charging operations begins, charging current is applied to one or more rechargeable batteries and continues determined charging interval section.
One or more aspects can provide following one or more advantage.
By utilizing for example relatively low internal resistance of ferric phosphate lithium cell, can constant current (CC) pattern in 3 minutes to 4 minutes, battery be charged to about 80% capacity, and can be in 5min they be charged to about 90% to 95% capacity.This charger is configured to determine having passed through or stops charging operations after time period of appointment, and needn't carry out any inspection with charge volume or the voltage levvl of determining battery or carry out the heat monitoring and/or the thermal control operation.This configuration can minimize required circuit, required thermal component etc., therefore can reduce the size of cost and charger.
The details of one or more embodiments of the invention is set forth in accompanying drawing and the following explanation.By reading specification, accompanying drawing and claims, other features, objects and advantages of the present invention will become apparent.
Description of drawings
Figure 1A is the block diagram of an exemplary of charger.
Figure 1B is for describing the flow chart with embodiment of variable timing.
Fig. 2 is the flow chart by an exemplary of the charging rules of the charger execution of Fig. 1.
Fig. 3 A to B is the charging voltage behavior of the 1Ah lithium ion battery of the charger of demonstration use Figure 1A and the figure of charging current behavior.
Embodiment
Electrochemical cell can be primary cell unit or secondary battery cell.The primary electrochemical cells unit means that only discharge (for example to exhausting) once, then goes out of use.The primary cell unit does not plan to recharge.The primary cell unit is described in for example Handbook ofBatteries(McGraw-Hill of David Linden, the 2nd edition, 1995) in.On the other hand, secondary electrochemical cells is also referred to as rechargeable cell or battery hereinafter, rechargeable many times, for example, 50 times, 100 times etc.Secondary battery cell is described in for example Falk ﹠amp; " Alkaline Storage Batteries " (John Wiley ﹠amp of Salkind; Sons, Inc.1969); United States Patent (USP) 345,124; In French Patent (FRP) 164,681, these patents are all incorporated into way of reference accordingly.
Referring to Figure 1A, it has shown the charger 10 that is configured to rechargeable battery 12 chargings, and described battery has at least one based on the chargeable electrochemical battery unit of LiFePO4 chemical substance.This battery is sometimes referred to as secondary cell, comprises battery unit.In some embodiments, described battery unit has lithium titanate anode material and LiFePO4 cathode material, and they are suitable for making the rechargeable battery based on materials to recharge fast.The LiFePO4 chemical substance has low internal resistance (R).Result from heat dissipation and the IR of internal resistance of this type of battery
2Proportional (wherein I is the charging current that is applied on the battery).Because the battery based on the LiFePO4 chemical substance has low internal resistance, so this type of battery can be accepted large charging current.
Therefore, by using low changeable internal damp bvattery such as ferric phosphate lithium cell, about 80% capacity can be constant current (CC) pattern in 3 minutes to 4 minutes, battery charged to, and about 90% to 95% capacity can be in 5 minutes they charged to.As institute is apparent hereinafter, the battery that charges based on the LiFePO4 chemical substance with large charging current generally can cause battery to obtain 90% to 95% charging capacity in five (5) minutes, so charger is configured to should stop charging operations after the time period and needn't carry out any inspection with charge volume or the voltage levvl of determining battery or carry out the heat monitoring and/or the thermal control operation having passed through.Charger can be measured the charging interval with timer, and the charging interval section that reaches preassignment at timer for example stops charging operations 5 minutes the time.Although what Fig. 1 showed is the single battery 12 that is connected on the charger 10, charger 10 can be configured to have the balancing cell that is connected thereto.In addition, charger 10 also can be configured to admit and the different battery types that charges, and comprises cylindrical battery, prismatic battery, coin battery or button cell etc.
Passed through 5 minutes that predetermined amount of time for example counts when charging operations begins after, charging operations stops.Because charger is configured to unconditionally stop charging operations (temperature of battery and/or charger 10 unlikely significantly raises during this period) within the relatively short time period, therefore in some embodiments, there is no need to monitor the temperature of battery 12 and/or charger 10.Therefore, do not carry out therein in the embodiment of heat monitoring and control operation, the structure of charger 10 compactness and circuit is simplified.
Also shown in Figure 1A, in some embodiments, charger 10 is implemented to so that current/voltage is regulated and for example can uses feedback control strategies directly to carry out (this configuration is sometimes referred to as primary side voltage/electric current and regulates) in that the power transfer part (for example, the power conversion module shown in Figure 1A 16) of charger is upper.In other words, in some embodiments, switching frequency or the pulse duration of controlling organization regulating power modular converter 16, so the output voltage of regulating rotary parallel operation and electric current.Therefore, in this type of embodiment, charger 10 does not comprise a plurality of voltage conversion stages (for example, AC/DC translate phase, after connect for example step-down controller circuit), so charger 10 can reduce generally to continue to occur in the power loss in the multistage circuit for power conversion.For example, by implementing primary side voltage/Current Control, power efficiency (for example, finally being delivered to the percentage of input power of the output of circuit for power conversion) is usually in 80% to 90% scope.By contrast, the efficient in per stage of two-stage type circuit for power conversion is generally 80% to 90%, so the overall power efficiency of two-stage type circuit for power conversion is generally in 60% to 80% scope.These losses in the power efficiency represent with the heat dissipation in the power conversion stages.
Being coupled on the rectifier module 14 is power conversion module 16, and described power conversion module comprises transformer 18 and is conducive to regulate the transformer control unit 20 of the operation of transformer 18.In some embodiments, power conversion module 16 is embodied as dc-dc converter, wherein the voltage levvl of the output place of power conversion module 16 need obtains by turning on and off power conversion module 16.During the connection of switch, provide voltage in output place of power conversion module 16; And at blocking interval, do not provide voltage at the lead-out terminal place of power conversion module 16.In some embodiments, this dc-dc converter can use discrete transistor (for example, mosfet transistor) to implement, and maybe can use the suitable integrated circuit (IC) that can carry out handover operation to implement.
In some embodiments, will add DC-DC transducer 19 and be incorporated in the power conversion module 16, be converted to the DC power level that is applicable to the rechargeable battery charging with the DC power supply with outside DC power supply such as automobile.For example, in some embodiments, the DC power supply of automobile provides DC power with about 11V to 14.4V, thereby DC-DC transducer 19 can be converted to this voltage levvl suitable voltage levvl.The DC-DC transducer that adds can be configured to be received in 1.2V to the interior almost any DC power supply of about 24V scope.Therefore, in some embodiments, the DC-DC transducer is boost converter, the voltage of 1.2V can be increased to 3.7 volts to 4.2 volts DC charging voltage, and in those application more than 4.2 volts, transducer is step-down controller.
Be electrically coupled to and be filter circuit 24 in the output of power conversion module 16, described circuit comprises that being connected in series to the capacitor 28 and the resistor 29(that are arranged in parallel is labeled as R
Sh) on diode 26.Filter circuit 24 is configured to reduce the current/voltage pulsation of output place of power conversion module 16.The energy that filter circuit 24 also is configured to output place at power conversion module 16 and does not provide the blocking interval of electric current will be stored in the capacitor 28 is discharged in the battery 12.Therefore, the electric current that during it is connected, is provided by power conversion module 16 and can cause being substantially equal to the required effective current that will be applied to the charging current on the battery 12 at the electric current that the blocking interval of power conversion module 16 provides by capacitor 28.Diode 26 is connected to be directed to battery 12 and not to be directed in the power conversion module 16 by the electric current that capacitor 28 discharges.
In order to control electric current and/or the voltage levvl that is applied on the battery 12, come the DC output voltage of regulating power modular converter 16 with the feedback mechanism that comprises controller 30.Power conversion module 16 is coupled to the lead-out terminal terminal of battery 12 (and therefore be coupled to) of charger 10, and charging current namely applies by described terminal.Controller 30 is electrically coupled on switch pulse width modulation (PWM) control unit 32, the control signal of described unit reception sources self-controller 30 and correspondingly generate the signal of pulse-width modulation, the signal of described pulse-width modulation are provided for transformer control unit 20 so that power conversion module 16 provides voltage in its output place.When the signal of pulse-width modulation was cancelled, transformer control unit 20 made voltage cancel from the output of power conversion module 16.Therefore, by current feedback voltage and preset value are compared the also operation of control switch PWM control unit 32, and the therefore operation of power ratio control modular converter 16, controller 30 can cause being substantially equal to be applied to the electric current of the charging current on the battery 12.Controller 30 also is configured to specify or predetermined time section (for example, 5 minutes) stops charging current afterwards having passed through.
Referring now to Figure 1B,, in some embodiments, the approximate existing charge level that controller 30 can be configured to determine 51 batteries 12 (for example, determine by the voltage of measuring battery), and determine that based on determined approximate existing charge level 53 should be applied to charging current the duration section on the battery 12.Determined charge level be applied on the battery continue the determined time period, and thereafter charger with hang up.This embodiment can provide flexibly timer, and described timer can be according to the existing battery charge volume self-control charging interval.Therefore, depend on the initial condition of battery charge volume, sustainable one minute of charging operations or still less to maximum time of about 5 minutes or 6 minutes.
Can be at least in part based on the specified input of user to the definite of charging current that will be applied on the battery 12, described input provides by the user interface (not shown) that is arranged on the charger 10.This user interface can comprise for example switch, button and/or knob, and the user can for example remain the capacity of the battery that recharges by they indications.In addition, in some embodiments, this interface can be configured to allow the user specify and closely-related other parameter of charging process, for example the charging interval (for example need therein to grow the charging interval 10 minutes to 15 minutes situation under).For the concrete charging current of determining to use, can consult the look-up table that to indicate corresponding to the suitable charging current of the specified parameter of user.For example, the ferric phosphate lithium cell of 500mAh capacity to be recharged if the user specifies, then can retrieve the clauses and subclauses corresponding to this designated capabilities in the look-up table.In some embodiments, can determine suitable charging current with computing technique.
In some embodiments, determining and following mode to carry out charging current: the capacity of identifying the battery in the charging compartments that is placed on charger 10 with the identification mechanism that the data that represent battery capacity and/or battery types for example can be provided.Use exercise question that the detailed Description Of The Invention based on the exemplary charger device of the identification mechanism of ID resistor (resistance with the battery capacity of represent) is provided in to submit to simultaneously in the patent application of " Ultra Fast Battery Charger with BatterySensing " a kind of comprising, introducing is for your guidance in full accordingly for the content of this patent application.
The user interface can comprise that also input element (for example, switch) is to enable or to forbid charger 10.The user interface can comprise that also output indicator device such as LED is to provide state information about the charger that is connected thereto and/or battery 12, display unit that provides to the user output information etc. is provided to the user.For example, the user interface can comprise the LED that is lit when charger when constant-current mode switches to constant-voltage mode.In general, when the voltage of battery reaches alternation point (for example, between between the 3.8V to 4.2V), the charge volume of battery be generally battery charging capacity 80% to 90%, and therefore basically available.The LED that is lit has charged at least 80% to 90% to user's pilot cell, if at this moment the user needs to use immediately battery and do not think that by the time charging operations is finished fully, then the user can be chosen in charging operations and take out battery before finishing.
In some embodiments, the user interface can comprise that also for example additional output device is to provide additional information.For example, the user interface can comprise the red LED (if fault state having occured such as overvoltage) that is lit, and can comprise another LED for example yellow or green LED device with the charging operations well afoot of indication to battery 12.
Also as shown in Figure 1, controller 30 comprises processor device 34, and described device is configured to control the charging operations that battery 12 is carried out.Processor device 26 can be calculating and/or the processing unit of any type, such as the PIC18F1320 microcontroller that is derived from Microchip Technology Inc..The processor device 34 that is used for the implementation of controller 30 comprises the volatile and/or non-volatile memory element that is configured to storing software, described software comprise to realize the processor based devices general operation computer instruction and be used for carrying out being coupled to battery 12 on the charger implementation program of charging operations, described charging operations is included in the charging operations that reaches at least 90% charging capacity in about 5 minutes.
Processor 34 comprises mould-number (A/D) transducer 36, and described transducer is with a plurality of modulus input and output lines.A/D converter 36 is configured to reception sources from the signal that is coupled to the transducer (hereinafter describing) on the battery, to be conducive to the regulation and control charging operations.In some embodiments, controller 30 also can comprise digital signal processor (DSP), with in the processing capacity of carrying out control device as described herein some or all.
Can with the various modules of charger, comprise that rectifier unit 14, transformer control unit 20, processor 34 and switch PWM control unit 32 are arranged on the circuit board (not shown) of charger 10.
Transistorized turn-on time or duty cycle are initially raise from 0% duty cycle, measure output current and voltage with Time Controller or feedback loop.In case reached determined charging current, feedback control loop is just managed transistor duty cycle with the loop circuit linear feedback scheme, for example usage ratio integral differential or PID mechanism.In case charger voltage output or battery terminal voltage have reached alternating voltage, similarly controlling organization can be used to control transistorized duty cycle.
Therefore, the electric current that during it is connected, is provided by power conversion module 16 and should be caused being substantially equal to the effective current of required charging current by the electric current that capacitor 28 provides at the blocking interval of power conversion module 16.
In some embodiments, controller 30 periodically receives the measured value that (for example, every 0.1 second) flows through the electric current of battery 12, and described electric current is for example measured by current sensor 40.Based on this measured current that receives, controller 30 is regulated duty cycle to cause the adjusting to the electric current that flows through battery 12, so that this electric current converges to the value that is substantially equal to the charging current level.In the constant current phase of charging process, current sensor 40 also is used for periodically measuring the electric current of battery, so that controller 30 can be provided by the electric current that is provided by power conversion module 16, so that be applied to the level that charging current on the battery 12 is in substantial constant.
Can be used to determine whether to exist fault state by transducer 40 and 42 current/voltages of measuring, described fault state requires to stop charging operations or do not begin charging operations.For example, controller 30 can determine whether the voltage at the terminal place of the battery 12 measured by voltage sensor 42 is in the preset range (for example, 2V to 3.8V) of the voltage levvl of battery 12.If measured value is lower than the lower voltage limit of this scope, but this pilot cell defectiveness then.If measured value is higher than the upper limit of this scope, but then fully charging of this pilot cell, and therefore further charging is unnecessary and may damages battery.Therefore, if actual measurement voltage does not drop in the preset range, then think to have fault.
Charger can similarly determine for the electric current of measuring by current sensor 40, and if measured current outside predetermined current range, then can think to have fault, so charging operations will not begin, maybe will be terminated.
In some embodiments, the measured signal that receives is processed with the charge controller device of analog logic treatment element (not shown) such as special use, and described device can comprise that for example the threshold value comparator is to determine by transducer 40 and/or 42 voltage levvl and the levels of current of measuring.Charger 10 also can comprise for to simulation and/or the digital input signals signal adjustment component (not shown) that carries out signal filtering and processing, to prevent to be measured (for example, the mistake of voltage, temperature etc. being measured) by the mistake that extraneous factor such as circuit level noise causes.
In some embodiments, controller 30 is configured to as follows, and monitoring voltage increases speed: the voltage of periodically measuring the terminal place of battery 12, and regulate the charging current that is applied on the battery 12, so that pre-determined upper voltage limit can reach in the voltage rising time section of certain appointment.Increase speed based on actual measurement voltage, the charging current level is conditioned to increase or reduce charging current, so that pre-determined upper voltage limit can reach in the voltage rising time of appointment.Adjusting to the charging current level can for example be carried out according to the predicted correction technology with Kalman filter.Also can use for determining that adjusting to electric current is to obtain other method of pre-determined upper voltage limit.
Because the interval (for example, 5 minutes) that charger as herein described can be lacked relatively is with for example ferric phosphate lithium cell charging of battery, therefore this charger can not produce a large amount of heat usually in this operating period.Therefore, can from charger, eliminate the operation that is configured to protect the normal charge device, to prevent owing to producing the hot infringement that causes and certain module and/or the assembly of dangerous operation.For example, can construct charger 10 and do not use thermal control assembly (for example, fan, radiator element, additional control module etc.) and/or do not have hot monitoring assembly (for example, heat sensor is such as thermistor).
In addition, because the operating time of charger as herein described is shorter, so the block dimension of the various assemblies of charger (they usually are configured to have the heat of large surface area to dissipate and to be produced) can be less than the assembly that is used for the normal charge device.Therefore therefore, the assembly of this type of reduced size can be fitted in the shell of reduced size, cause the block dimension of charger apparatus to be generally less than the block dimension of normal charge apparatus.
Fig. 2 describes an exemplary of the charging rules 50 that are used for recharging the rechargeable battery 12 in the charging compartments that is placed on charger 10.After in the charging compartments that battery 12 is placed into charger, charger 10 optionally determined whether to exist some fault state before the beginning charging operations.Therefore, for example, charger 10 is measured the voltage of 52 batteries 12.Charger 10 is determined 54 actual measurement voltage V
0(for example, V in preset range whether
0Between between the 2V to 3.8V).Determining in the permissible range that actual measurement voltage be not scheduled to therefore so that in the unsafe situation of charging operations under the precondition, charger can not proceeded charging operations, thereby rules 50 can stop.
If charger 10 is suitable for admitting the dissimilar battery of different capabilities, then charger 10 can determine that 55 are inserted into capacity and/or the type of the battery 12 in the charging compartments of charger 10.In some embodiments, charger 10 comprises the identification mechanism of the resistance that is configured to measure the ID resistor that is connected on the battery 12, and institute's resistance represents capacity and/or the type of battery 12.In addition and/or alternatively, can capacity and/or the type of battery 12 be conveyed to charger by the user interface, described interface is arranged on the main body of charger 10 for example.Therefore, the data of passing on by identification mechanism, user interface or alternate manner can represent capacity and/or the type of battery.Therefore charger can be determines to be applied to suitable charging current on the battery based on these data.For example, calculate at charger 10 in the situation of resistance of ID resistor of batteries 12, the look-up table of charger 10 accessible storage in the memory storage module of charger 10, but described look-up table index is corresponding to the suitable charging current of the capacity that is associated with the resistance that calculates.
After the charging current of having determined to be applied on the battery 12, can start 58 timers, described timer is configured to measure the charging operations time period of preassignment.Timer can be for example Special timer module of processor 34, or can be the counter that increases progressively with the regular time interval of being measured by inside or the external clock of processor 34.
With battery 12 substantial constant current charges, until the voltage at battery terminal place reaches pre-determined upper voltage limit.Therefore, periodically measure 62 voltages that are applied on the battery 12, to determine when the upper voltage limit (that is, alternating voltage) that reaches predetermined.When the voltage at the terminal place of battery 12 has reached pre-determined upper voltage limit for example during 4.2V, (also carrying out at 62 places) power conversion module 16 is controlled to keep being substantially equal to the constant voltage level of alternating voltage level at the terminal place of battery 12.
In addition, the LED that also can light on the user interface of charger 10 has reached the alternating voltage point with indication, and therefore pilot cell has had enough charge volumes of normal operation.At this moment, if battery is used in user's expectation immediately, then the user can take out battery 12.
Can periodically measure (operating not shown in Figure 2) voltage and increase speed, so that pre-determined upper voltage limit can reach in the voltage rising time section of appointment.Increase speed based on actual measurement voltage, the charging current level is conditioned (follow corresponding to being applied to the adjusting of the enabling signal on the current/voltage regulating circuit), to increase or reduce charging current so that predetermined upper voltage limit can reach in the voltage rising time of appointment.
After definite 64 have passed through the time period that is substantially equal to the charging interval section, stop being applied to the charging current (for example, by ending electric starting power modular converter 16 with switch PWM control module 32 and/or transformer control unit 20) on the battery 12.After the pre-determined upper voltage limit that has reached battery 12, or after having reached certain appointment charge level of battery 12, the charging rules stop when having passed through special time period.
Fig. 3 A and 3B show respectively exemplary charging voltage behavior and the charging current behavior of 1Ah ferric phosphate lithium cell, use the charger of type shown in Figure 1 to make described battery stand 5 minutes charging under 4.2V CV/12A CC.Shown in Fig. 3 B, when charging operations begins, the constant current of about 12A is applied on the battery.When the charging current of 12A, the battery of 1Ah will be in about 5 minutes (1Ah/12A=0.0833h=5 minute) by fully charging (exhausting fully if it is originally basically).
As described, charger is configured to make the substantial constant electric current to produce and is applied on the battery 12, and therefore, in response to the fluctuation (shown in the spike that manifests among the figure) of electric current, charger will make mean charging current be held constant at about 12A.When applying charging current at first, the voltage at the charging terminal place of charger and/or battery 12 is about 3.7V.Voltage begins to increase, and reaches the average level of 4.2V after about 3 minutes.Thereafter, the voltage at charging terminal place remains on this level.
Other embodiment
Embodiments more of the present invention have been described now.But should be appreciated that under the condition that does not deviate from spirit and scope of the invention and can carry out various modifications.For example, charger can be associated with the docking base or embed within it, and described docking base is used for electronic installation, for example mobile phone, computer, personal digital assistant etc.Therefore, other embodiment is also within the scope of following claim.
Claims (24)
1. method that is used for the rechargeable battery charging, described method comprises: determine to be applied to the levels of current on the described rechargeable battery, so that described rechargeable battery has the pre-determined charge that reaches in the charging interval section between 4 to 6 minutes, wherein, the described charging interval section existing charge level that is based in part on described rechargeable battery is determined; To have basically, the charging current of determined approximately levels of current is applied on the rechargeable battery; And
After having passed through described charging interval section, stop described charging current.
2. the method for claim 1, described method also comprises:
During described charging interval section:
When charging operations begins, constant charge current is applied to described rechargeable battery, and after the predetermined voltage level at the terminal place that reaches described rechargeable battery, periodically regulate described charging current, so that the voltage between the terminal of described rechargeable battery is remained on described predetermined voltage level.
3. method as claimed in claim 2, described method also comprises:
The output indicator device is started.
4. method as claimed in claim 3, the pre-determined charge of wherein said rechargeable battery be described rechargeable battery charging capacity at least 90%, and wherein said charging interval section is about 5 minutes.
5. the method for claim 1 is wherein carried out the temperature that applies described charging current and do not monitor described rechargeable battery.
6. the method for claim 1 wherein applies the electric current that described charging current comprises that adjusting is provided by the power conversion module with voltage transformer part.
7. method as claimed in claim 6 the electric current that is provided by described power conversion module wherein is provided is comprised the operation of regulating described voltage transformer part.
8. the method for claim 1, wherein determine to be applied to described levels of current on the described rechargeable battery comprise determine to be applied to chargeable based on the described levels of current on the battery of LiFePO4.
9. method that is used for the rechargeable battery charging, described method comprises: determine to be applied to the levels of current on the described rechargeable battery, so that described rechargeable battery has the pre-determined charge that reaches in the charging interval section between 3 to 4 minutes, wherein, the described charging interval section existing charge level that is based in part on described rechargeable battery is determined; To have basically, the charging current of determined approximately levels of current is applied on the rechargeable battery; And
After having passed through described charging interval section, stop described charging current,
The pre-determined charge of wherein said rechargeable battery be described rechargeable battery charging capacity at least 80%.
10. charger apparatus that is used for one or more rechargeable batteries chargings, described device comprises:
Be used for admitting the container of one or more rechargeable batteries, described container has the electric contact of the separately terminal that is configured to be coupled to described one or more rechargeable batteries; With
Controller, described controller is configured to:
Determine to be applied to the levels of current on described one or more rechargeable battery, so that described one or more rechargeable battery has the pre-determined charge that reaches in the charging interval section between 4 to 6 minutes, wherein, the described charging interval section existing charge level that is based in part on described rechargeable battery is determined;
To have basically, the charging current of determined approximately levels of current is applied on described one or more rechargeable battery; And
After having passed through described charging interval section, stop described charging current.
11. device as claimed in claim 10, described device also comprises power conversion module, and described power conversion module comprises voltage transformer.
Described controller is regulated the electric current by described power conversion module output 12. device as claimed in claim 11, wherein said device comprise feedback control strategies.
13. device as claimed in claim 12, wherein said feedback control strategies is configured to regulate the operation of described voltage transformer.
14. device as claimed in claim 12, wherein during described charging interval section:
When charging operations begins, constant charge current is applied to described rechargeable battery, and
After the voltage at described one or more rechargeable batteries place reached predetermined upper voltage limit level, described feedback control strategies remained on described predetermined upper voltage limit with the voltage at the terminal place of described one or more rechargeable batteries.
15. device as claimed in claim 14, described device also comprises the output indicator device, and wherein said controller is configured to make when the predetermined voltage level at the terminal place that reaches described rechargeable battery described output indicator device to start.
16. device as claimed in claim 10, described device also comprises the synchronous rectifier based on mosfet transistor.
17. it is one or more based on the described levels of current on the rechargeable battery of LiFePO4 that device as claimed in claim 10, wherein said controller are configured to determine to be applied to.
18. device as claimed in claim 10, wherein said controller comprises the microcontroller based on processor.
19. device as claimed in claim 10, the controller that wherein is configured to apply described charging current is configured to carry out the temperature that applies described charging current and do not monitor described one or more rechargeable batteries.
20. charger apparatus that is used for one or more rechargeable battery chargings, described device comprises: be used for admitting the container of one or more rechargeable batteries, described container has the electric contact of the separately terminal that is configured to be coupled to described one or more rechargeable batteries; And controller, described controller is configured to:
Determine to be applied to the levels of current on described one or more rechargeable battery, so that described one or more rechargeable battery has the pre-determined charge that reaches in the charging interval section between 3 to 15 minutes, wherein, the described charging interval section existing charge level that is based in part on described rechargeable battery is determined;
To have basically, the charging current of determined approximately levels of current is applied on described one or more rechargeable battery; And
After having passed through described charging interval section, stop described charging current,
The pre-determined charge of wherein said one or more rechargeable batteries be described one or more rechargeable batteries charging capacity at least 80%.
21. device as claimed in claim 20, the pre-determined charge of wherein said one or more rechargeable batteries are charging capacity about 80% of described one or more rechargeable batteries, and wherein said charging interval section is approximately between 3 to 4 minutes.
22. device as claimed in claim 20, the pre-determined charge of wherein said one or more rechargeable batteries be described one or more rechargeable batteries charging capacity at least 90% to 95%, and wherein said charging interval section is about 5 minutes.
23. a charger apparatus, described device comprises:
Electric contact, described electric contact are configured to be coupled to the separately terminal of one or more rechargeable batteries;
Circuit, described circuit is as follows to described one or more rechargeable battery chargings: when described charging operations begins constant charge current is applied on described one or more rechargeable battery, and keeps the constant voltage on described one or more rechargeable battery when the voltage of described one or more rechargeable batteries reaches predetermined upper voltage limit; With
Be configured to control the controller of described circuit, described controller is configured to:
Make described circuit to the charging interval section of described rechargeable battery charging between 4 to 6 minutes, and stop thereafter the charging to described rechargeable battery, wherein, the described charging interval section existing charge level that is based in part on described rechargeable battery is determined.
24. a charger apparatus, described device comprises:
Electric contact, described electric contact are configured to be coupled to the separately terminal of one or more rechargeable batteries; With
Circuit, described circuit is as follows to described one or more rechargeable batteries charging: measure existing charge volume in the described rechargeable battery, determine to apply the time period of charging current, when described charging operations begins charging current be applied to described one or more rechargeable battery and continue determined charging interval section, wherein, the described charging interval section existing charge level that is based in part on described rechargeable battery is determined.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US90801307P | 2007-03-26 | 2007-03-26 | |
| US60/908,013 | 2007-03-26 |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200880009981A Division CN101647176A (en) | 2007-03-26 | 2008-03-25 | Lithium iron phosphate ultra fast battery charger |
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|---|---|
| CN103036292A true CN103036292A (en) | 2013-04-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN200880009769A Pending CN101647174A (en) | 2007-03-26 | 2008-03-20 | Compact ultra fast battery charger |
| CN2012105466901A Pending CN103036292A (en) | 2007-03-26 | 2008-03-25 | Method for charging rechargeable battery and charger device |
| CN200880009981A Pending CN101647176A (en) | 2007-03-26 | 2008-03-25 | Lithium iron phosphate ultra fast battery charger |
Family Applications Before (1)
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| CN200880009769A Pending CN101647174A (en) | 2007-03-26 | 2008-03-20 | Compact ultra fast battery charger |
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| CN200880009981A Pending CN101647176A (en) | 2007-03-26 | 2008-03-25 | Lithium iron phosphate ultra fast battery charger |
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| EP (1) | EP2130283A2 (en) |
| JP (2) | JP2010521950A (en) |
| CN (3) | CN101647174A (en) |
| BR (1) | BRPI0809517A2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104348222A (en) * | 2013-07-31 | 2015-02-11 | 奇诺沃公司 | Adaptive charging system and method for a battery using multiple charge circuits |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110227536A1 (en) * | 2010-03-17 | 2011-09-22 | Bourilkov Jordan T | Battery with universal charging input |
| KR101181859B1 (en) * | 2010-08-30 | 2012-09-11 | 삼성에스디아이 주식회사 | Charge and discharge apparatus for secondary cell and driving method thereof |
| US20130002199A1 (en) * | 2011-06-29 | 2013-01-03 | Ran Hu | Charging of Li-ion Batteries |
| JP5561327B2 (en) * | 2012-08-06 | 2014-07-30 | Ｓｍｋ株式会社 | Charger |
| EP2701268A1 (en) | 2012-08-24 | 2014-02-26 | Philip Morris Products S.A. | Portable electronic system including charging device and method of charging a secondary battery |
| CN107272457B (en) * | 2017-07-06 | 2020-04-07 | 河南卓正电子科技有限公司 | Internet of things module device and internet of things system of intermittent type formula power supply |
| CN114400748A (en) * | 2022-02-22 | 2022-04-26 | 徐州市恒源电器有限公司 | 300W mobile power station and use method thereof |
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| CN1619877A (en) * | 2003-11-20 | 2005-05-25 | Tdk株式会社 | Lithium ion secondary cell charging method, charger and power supply device |
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| TW226496B (en) * | 1992-07-21 | 1994-07-11 | Sanyo Denki Kk | Battery charger |
| JPH06225466A (en) * | 1993-01-22 | 1994-08-12 | Toshiba Corp | Secondary battery changing circuit |
| JP2006353037A (en) * | 2005-06-17 | 2006-12-28 | Mitsumi Electric Co Ltd | Charging method and charger |
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2008
- 2008-03-20 CN CN200880009769A patent/CN101647174A/en active Pending
- 2008-03-25 CN CN2012105466901A patent/CN103036292A/en active Pending
- 2008-03-25 EP EP08719822A patent/EP2130283A2/en not_active Ceased
- 2008-03-25 CN CN200880009981A patent/CN101647176A/en active Pending
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1619877A (en) * | 2003-11-20 | 2005-05-25 | Tdk株式会社 | Lithium ion secondary cell charging method, charger and power supply device |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104348222A (en) * | 2013-07-31 | 2015-02-11 | 奇诺沃公司 | Adaptive charging system and method for a battery using multiple charge circuits |
| US9912181B2 (en) | 2013-07-31 | 2018-03-06 | Qnovo Inc. | Adaptive charging technique and circuitry for a battery/cell using multiple charge circuits and temperature data |
| CN104348222B (en) * | 2013-07-31 | 2018-04-27 | 奇诺沃公司 | System and method using multiple charging circuits to the adaptive inductive charging of battery |
Also Published As
| Publication number | Publication date |
|---|---|
| BRPI0809517A2 (en) | 2016-03-15 |
| EP2130283A2 (en) | 2009-12-09 |
| CN101647174A (en) | 2010-02-10 |
| JP2010521950A (en) | 2010-06-24 |
| JP2013048552A (en) | 2013-03-07 |
| CN101647176A (en) | 2010-02-10 |
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Application publication date: 20130410 |