CN101615810A - Battery balanced charging controller and battery module thereof - Google Patents
Battery balanced charging controller and battery module thereof Download PDFInfo
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- CN101615810A CN101615810A CN200810125767A CN200810125767A CN101615810A CN 101615810 A CN101615810 A CN 101615810A CN 200810125767 A CN200810125767 A CN 200810125767A CN 200810125767 A CN200810125767 A CN 200810125767A CN 101615810 A CN101615810 A CN 101615810A
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Abstract
The present invention is relevant a kind of battery balanced charging controller and battery module thereof.This battery balanced charging controller comprises: a bleeder mechanism, couple between battery first end and second end, and reference potential and following reference potential on one are provided, last reference potential is higher than reference potential down; One switch module comprises first and second switch; An and balancing circuitry, couple tie point, bleeder mechanism and switch module, balancing circuitry is according to the tie point current potential, whether reference potential decision equilibrium charging electric current flows through first or second switch up and down, the reference voltage that utilizes bleeder mechanism to provide judges what battery unit cell voltage is not enough in the battery module, and with balancing circuitry control switch module, make the charging current of low voltage battery unit big, each cell voltage unanimity when making full charging than the charging current of high voltage battery unit.This battery module comprises: (N+1) individual battery unit and N battery balanced charging controller, can be applicable to battery balanced charging controller, and make its range of application more extensive.
Description
Technical field
The present invention relates to a kind of battery balanced charging controller and battery module thereof, particularly relate to a kind of battery balanced charging controller and battery module thereof in order to the balancing battery charging.
Background technology
Along with the development of portable electronic product, the demand of rechargeable type battery also rises thereupon.TunePower has comprised lighium polymer (Li-Polymer) battery of Ni-MH battery, lithium ion battery and the latest development of known nickel-cadmium cell, subsequent development.The voltage that different types of rechargeable type battery is provided also is not quite similar, and the required operating voltage of portable electronic product is also different.Therefore, the battery manufacturer can cooperate the operating voltage of portable electronic product, and several battery strings are unified into battery module so that required voltage to be provided.
When battery module exhausts at the electric energy of battery, need be full of electricity again, for using next time with charger.Yet battery can be because of making or using and cause charge capacity different.For instance, 7.4V lithium battery module is that lithium battery by two 3.7V is composed in series.When dispatching from the factory, the charge capacity of two batteries is respectively 80% and 70%.Because over-charge of lithium battery can damage battery itself, therefore, lithium battery charger fills at arbitrary lithium battery and stops to charge when full, and at this moment, the charge capacity of two batteries is respectively 100% (battery charge the upper limit) and 90%.And in use, as long as arbitrary battery charge capacity reduces to 0% (battery discharge lower limit), battery module promptly can't use, and therefore, the charge capacity of these two batteries is reduced to and is respectively 10% and at 0% o'clock, promptly must recharge and could use.
By above-mentioned example as can be known, when the charge capacity of the battery of battery module was different, the reality of battery module can use electric energy to be determined by the minimum battery of charge capacity.And during except above-mentioned dispatching from the factory each battery charge capacity of battery module may difference, battery is not when using, also can self discharge, under the different situation of each self-discharge of battery speed, also can cause between battery charge capacity uneven gradually, make battery module reality can use electric energy to tail off gradually along with the service time of battery, cause the service efficiency of battery module low, also shorten service time.
Seeing also shown in Figure 1ly, is the circuit diagram of existing known digital battery balance controller, is Intersil disclosed digital battery balance controller in the product specification table (Da tasheet) of its ISL9208.One digital battery balance controller 10 comprises a battery equilibrium microprocessor 5 and transistor switch S1-S7.Transistor switch S1-S7 is in parallel with battery BAT1-BAT7 by resistance R 1-R7 respectively.The voltage of this battery BAT1-BAT7 converts digital signal to through analog/digital converter (A/D Converter), and (signal is a signal, this paper all is called signal), this battery equilibrium control microprocessor 5 is according to the voltage digital signal of battery BAT1-BAT7, compare the wherein higher battery of voltage through built-in algorithm, and the transistor switch of this higher voltage batteries parallel connection of conducting, make the charging current of each battery can reach the function of equilibrium charging according to the voltage adjustment of each battery.
Yet, after cell voltage need convert digital signal to via analog/digital converter, the battery equilibrium microprocessor 5 of numeral is just handled, and analog/digital converter can significantly increase the chip area 10 of this digital battery balance controller 10, so there is the quite high shortcoming of cost.In addition, the battery equilibrium microprocessor 5 of numeral can be subject to design originally, and for example: ISL9208 only can support 5 to 7 battery modules that battery is formed, and its applicable scope also can be therefore limited.
This shows that above-mentioned existing digital battery balanced charging controller and battery module thereof obviously still have inconvenience and defective, and demand urgently further being improved in structure and use.In order to solve the problem of above-mentioned existence, relevant manufacturer there's no one who doesn't or isn't seeks solution painstakingly, but do not see always that for a long time suitable design finished by development, and common product does not have appropriate structure to address the above problem, this obviously is the problem that the anxious desire of relevant dealer solves.Therefore how to found a kind of battery balanced charging controller and battery module thereof of new structure, real one of the current important research and development problem that belongs to, also becoming the current industry utmost point needs improved target.
Because the defective that above-mentioned existing digital battery balanced charging controller and battery module thereof exist, the inventor is based on being engaged in this type of product design manufacturing abundant for many years practical experience and professional knowledge thereof, and the utilization of cooperation scientific principle, actively studied innovation, in the hope of battery balanced charging controller and the battery module thereof of founding a kind of new structure, can improve general existing digital battery balanced charging controller and battery module thereof, make it have more practicality.Through constantly research, design, and, create the present invention who has practical value finally through after studying sample and improvement repeatedly.
Summary of the invention
The objective of the invention is to, overcome the too high defective of cost that existing digital battery balanced charging controller exists, and a kind of battery balanced charging controller of new structure, technical problem to be solved are provided is to make its battery charge controller that uses simulation reach the equilibrium charging of battery; Because the decision circuitry of simulation is compared to analog/digital converter, its chip area is quite little, thus have suitable advantage on the cost, and the battery module formed of the different number of batteries of can arranging in pairs or groups arbitrarily, adaptable scope is quite wide, is very suitable for practicality.
Another object of the present invention is to, overcome the defective that existing battery module exists, and provide a kind of battery module of new structure, technical problem to be solved is to make it can be applied to above-mentioned battery balanced charging controller, and the battery module formed of the different number of batteries of can arranging in pairs or groups arbitrarily, the scope that can make battery balanced charging controller use is more extensive, thereby is suitable for practicality more.
The object of the invention to solve the technical problems realizes by the following technical solutions.A kind of battery balanced charging controller according to the present invention's proposition, charging in order to balance one first battery and one second battery, one negative terminal of this first battery and an anode of second battery electrically connect to form a tie point, one anode of this first battery forms one first end, one anode of this second battery forms one second end, this battery balanced charging controller comprises: a bleeder mechanism, be coupled between this first end and this second end, reference potential reaches reference potential on one to provide, and reference potential is higher than this time reference potential on this; One switch module comprises one first switch and a second switch, and this first switch couples this first end and this tie point, and this second switch couples this second end and this tie point; And a balancing circuitry, couple this tie point, this bleeder mechanism and this switch module, this balancing circuitry according to this tie point current potential, on this reference potential and this time reference potential to determine an equilibrium charging electric current whether flow through this first switch or this second switch.
The object of the invention to solve the technical problems also can be applied to the following technical measures to achieve further.
Aforesaid battery balanced charging controller, wherein said balancing circuitry comprises one first comparator and one second comparator, this first comparator receives the current potential of this time reference potential and this tie point, to export one first comparison signal, this second comparator receives the current potential of reference potential and this tie point on this, to export one second comparison signal, this balancing circuitry produces one first control signal and one second control signal to control this first switch and this second switch according to this first comparison signal and second comparison signal, when the current potential of this tie point is lower than this time reference potential, this equilibrium charging electric current this first switch of flowing through, and the current potential of this tie point is when being higher than on this reference potential, this equilibrium charging electric current this second switch of flowing through.
Aforesaid battery balanced charging controller, it also comprises a resistance and couples this tie point and this switch module.
Aforesaid battery balanced charging controller, it more comprises a brownout lock cell (UnderVol tage LockOut) and couples this first end and this second end, when the potential difference of this first end and this second end is lower than a predetermined starting resistor, this brownout lock cell produces a brownout signal, to stop the operation of this battery balanced charging controller.
Aforesaid battery balanced charging controller, wherein said bleeder mechanism comprises one first resistance, one second resistance and one the 3rd resistance of series connection, this first resistance couples this first end, the 3rd resistance couples this second end, this second resistance couples this first resistance and should go up reference potential and couple the 3rd resistance producing this time reference potential to produce, and the resistance value of equal and this second resistance of the resistance value of this first resistance and the 3rd resistance is less than the resistance value of this first resistance.
Aforesaid battery balanced charging controller, it more comprises a time delay cell, couples this balancing circuitry and this switch module, and the time point of arbitrary conducting of this first switch and this second switch will be later than more than one scheduled time of another time point that the ends length.
Aforesaid battery balanced charging controller; it more comprises an over-temperature protection unit; in order to detect the temperature of this battery balanced charging controller; after this temperature surpassed an overheat protector temperature, this over-temperature protection unit can stop this battery balanced charging controller operation when producing an overheat protector signal.
Aforesaid battery balanced charging controller, it more comprises one and starts circuit for detecting, starts this battery balanced charging controller after receiving an enabling signal.
The object of the invention to solve the technical problems also realizes by the following technical solutions.According to a kind of battery module that the present invention proposes, it comprises: (N+1) individual battery unit, should electrically connect with the series connection form each other by (N+1) individual battery unit, and wherein N is the integer greater than zero; And N battery balanced charging controller, wherein N battery balanced charging controller is coupled to N battery unit of series connection and one first end of (N+1) individual battery unit, one second end and a tie point, and this N battery balanced charging controller is according to this first end, this second end and this tie point are judged the cell potential of this N battery unit and this (N+1) individual battery unit, and being higher than low cell potential one predetermined percentage when above at the higher cell potential of N battery unit and this (N+1) individual battery unit, conducting one equilibrium charging electric current is to the battery unit that should hang down cell potential.
The object of the invention to solve the technical problems also can be applied to the following technical measures to achieve further.
Aforesaid battery module, wherein said each this battery balanced charging controller comprises one first comparator and one second comparator, this first comparator receives the current potential of reference potential and this tie point to export one first comparison signal, the current potential of reference potential and this tie point is to export one second comparison signal in this second comparator reception one, and whether this battery balanced charging controller produces this equilibrium charging electric current according to this first comparison signal and this second comparison signal with decision.
Aforesaid battery module, wherein said each this battery balanced charging controller more comprises a bleeder mechanism, couples this first end and this second end, so that reference potential and this time reference potential on this to be provided, is higher than this time reference potential and should go up reference potential.
Aforesaid battery module, wherein said bleeder mechanism comprises one first resistance, one second resistance and one the 3rd resistance of series connection, this first resistance couples this first end, the 3rd resistance couples this second end, this second resistance couples this first resistance and should go up reference potential and couple the 3rd resistance producing this time reference potential to produce, and the resistance value of equal and this second resistance of the resistance value of this first resistance and the 3rd resistance is less than the resistance value of this first resistance.
Aforesaid battery module, wherein said each this battery balanced charging controller more comprises a switch module, it comprises one first switch and a second switch, this first switch couples this first end and this tie point, this second switch couples this second end and this tie point, and this battery balanced charging controller determines this equilibrium charging electric current flow through this first switch or this second switch according to this first comparison signal and this second comparison signal.
Aforesaid battery module, wherein said each this battery balanced charging controller more comprises a time delay cell, makes the time point of arbitrary conducting of this first switch and this second switch will be later than another time point that ends more than one scheduled time.
Aforesaid battery module, wherein said each this battery balanced charging controller couples this tie point by a resistance.
Aforesaid battery module, wherein said each this battery balanced charging controller more comprises a brownout lock cell, couple this first end and this second end, when the potential difference of this first end and this second end was lower than a predetermined starting resistor, this brownout lock cell can stop this battery balanced charging controller when producing a brownout signal.
Aforesaid battery module; wherein said each this battery balanced charging controller more comprises an over-temperature protection unit; in order to detect the temperature of this battery balanced charging controller; after this temperature surpassed an overheat protector temperature, this over-temperature protection unit can stop this battery balanced charging controller operation when producing an overheat protector signal.
Aforesaid battery module, wherein said each this battery balanced charging controller more comprise one and start circuit for detecting, start this battery balanced charging controller after receiving an enabling signal.
The present invention compared with prior art has tangible advantage and beneficial effect.By above technical scheme as can be known, major technique of the present invention thes contents are as follows:
In order to achieve the above object, the invention provides a kind of battery balanced charging controller, comprise a bleeder mechanism, a switch module and a balancing circuitry, with the charging of balance one first battery and one second battery.One negative terminal of this first battery and an anode of this second battery electrically connect to form a tie point, and an anode of this first battery forms one first end, and an anode of this second battery forms one second end.This bleeder mechanism is coupled between this first end and this second end, and reference potential reaches reference potential on one to provide, and reference potential is higher than this time reference potential on this.This switch module comprises one first switch and a second switch, and this first switch couples this first end and this tie point, and this second switch couples this second end and this tie point.This balancing circuitry couples this tie point, this bleeder mechanism and this switch module, and this balancing circuitry is according to this tie point current potential, reference potential and this time reference potential can determine an equilibrium charging electric current whether flow through this first switch or this second switch on this.
In addition, in order to achieve the above object, the present invention also provides a kind of battery module, comprises (N+1) individual battery unit and N battery balanced charging controller, and wherein N is the integer greater than zero.Should electrically connect with the series connection form each other by (N+1) individual battery unit.Wherein, N battery balanced charging controller is coupled to N battery unit of series connection and one first end of (N+1) individual battery unit, one second end and a tie point, and this N battery balanced charging controller is according to this first end, this second end and this tie point are judged the cell potential of this N battery unit and this (N+1) individual battery unit, and being higher than low cell potential one predetermined percentage when above at the higher cell potential of N battery unit and this (N+1) individual battery unit, conducting one equilibrium charging electric current is to the battery unit that should hang down cell potential.
By technique scheme, battery balanced charging controller of the present invention and battery module thereof have following advantage and beneficial effect at least:
1, battery balanced charging controller of the present invention can guarantee that the time point of arbitrary conducting of this first switch and this second switch will be later than more than one scheduled time of another time point that the ends length, and can effectively avoid the problem of conducting simultaneously.
2, battery balanced charging controller of the present invention, can reach the equilibrium charging of battery by the battery charge controller that uses simulation, because the decision circuitry of simulation is compared to analog/digital converter, its chip area is quite little, so have suitable advantage on the cost, and the battery module formed of the different number of batteries of can arranging in pairs or groups arbitrarily, adaptable scope is quite extensive, is very suitable for practicality.
3, battery module of the present invention can be applied to above-mentioned battery balanced charging controller, and the battery module formed of the different number of batteries of can arranging in pairs or groups arbitrarily, and the scope that can make battery balanced charging controller use is more extensive, thereby is suitable for practicality more.
4, battery module of the present invention, in the time of can making the battery module of built-in battery balanced charging controller of the present invention can guarantee that each battery unit all can be full of electric energy, and more general battery module has the service efficiency of higher battery module and long service time.
In sum, the present invention is relevant a kind of battery balanced charging controller and battery module thereof, has disclosed a kind of battery charge controller to reach the equilibrium charging of battery.This battery balanced charging controller, comprise a bleeder mechanism, a switch module and a balancing circuitry, a reference voltage that utilizes this bleeder mechanism to provide judges that the cell voltage of what battery unit in the battery module is not enough, and control this switch module with this balancing circuitry, make the charging current of battery unit of low voltage big than the charging current of higher voltage batteries unit, and when making full charging, the cell voltage unanimity of each battery can reach the equilibrium charging of battery.The present invention has above-mentioned plurality of advantages and practical value, no matter it all has bigger improvement on the structure of product or function, obvious improvement is arranged technically, and produced handy and practical effect, and more existing digital battery balanced charging controller and battery module thereof have the outstanding effect of enhancement, thereby being suitable for practicality more, really is a new and innovative, progressive, practical new design.
Above-mentioned explanation only is the general introduction of technical solution of the present invention, for can clearer understanding technological means of the present invention, and can be implemented according to the content of specification, and for above-mentioned and other purposes, feature and advantage of the present invention can be become apparent, below especially exemplified by preferred embodiment, and conjunction with figs., be described in detail as follows.
Description of drawings
Fig. 1 is the circuit diagram that has known digital battery balance controller now.
Fig. 2 is the circuit diagram according to the battery balanced charging controller of a preferred embodiment of the present invention.
Fig. 3 is the circuit diagram of the battery module of built-in battery balanced charging controller of the present invention.
5: battery equilibrium microprocessor 10: the digital battery balance controller
S1～S7: transistor switch R1～R7: resistance
BAT1～BAT7: battery 100: battery balanced charging controller
105: 110: the first comparators of processing unit
Comparator 120 in 115: the second: NAND gate
125: with door 130: very first time delayer
135: the second time delay device R1: first resistance
R2: 3: the three resistance of second resistance R
EA: enabling signal VCC: power supply
BAT1: the first battery BAT2: second battery
BAT3: the 3rd battery V+: go up reference potential
V-: following reference potential Q1: first switch
Q2: second switch Rex t: resistance
DET: voltage signal Vr 1, Vr2: voltage
Embodiment
Reach technological means and the effect that predetermined goal of the invention is taked for further setting forth the present invention, below in conjunction with accompanying drawing and preferred embodiment, to battery balanced charging controller and its embodiment of battery module, structure, feature and the effect thereof that foundation the present invention proposes, describe in detail as after.
Relevant aforementioned and other technology contents, characteristics and effect of the present invention can be known to present in the following detailed description that cooperates with reference to graphic preferred embodiment.By the explanation of embodiment, when can being to reach technological means that predetermined purpose takes and effect to get one more deeply and concrete understanding to the present invention, yet appended graphic only provide with reference to the usefulness of explanation, be not to be used for the present invention is limited.
Seeing also shown in Figure 2ly, is the circuit diagram according to the battery balanced charging controller of a preferred embodiment of the present invention.Battery balanced charging controller 100 according to a preferred embodiment of the present invention comprises a bleeder mechanism, a switch module and a balancing circuitry.
Above-mentioned bleeder mechanism comprises one first resistance R 1, one second resistance R 2 and one the 3rd resistance R 3, and this first resistance R 1 is coupled to the anode of one first battery BAT1, and the 3rd resistance R 3 is coupled to the negative terminal of one second battery BAT2.
Wherein, this second resistance R 2 couples this first resistance R 1 to produce reference potential V+ on, and couple the 3rd resistance R 3 to produce reference potential V-, the resistance value of this first resistance R 1 and the 3rd resistance R 3 equate and the resistance value of this second resistance R 2 less than the resistance value of this first resistance, that preferable is R1: R2: R3=100: 1: 100.
Above-mentioned switch module comprises one first a switch Q1 and a second switch Q2;
This first switch Q1 be coupled to the anode of this first battery BAT1 and the tie point of this first battery BAT1 and this second battery BAT2, and this second switch Q2 is coupled to negative terminal and this tie point of this second battery BAT2.
In order to limit the size of current of flow through this first switch Q1 or this second switch Q2, preferable for to be connected to this tie point by a resistance R ext, so can avoid excessive charging current and make battery damage or battery balanced charging controller 100 overheated.
Above-mentioned balancing circuitry is coupled between this bleeder mechanism and this switch module, comprises one first comparator 110, one second comparator 115, a NAND gate 120 and one and door 125.
These first comparator, 110 its non-return ends couple the tie point of this second resistance R 2 and the 3rd resistance R 3, and backward end couples the tie point of this first battery BAT1 and this second battery BAT2.
This first comparator 115, its backward end couple the tie point of this second resistance R 2 and this first resistance R 1, and non-return end couples the tie point of this first battery BAT1 and this second battery BAT2.
Can normal running in order to ensure battery balanced charging controller 100; battery balanced charging controller 100 can more comprise a processing unit 105, and this processing unit 105 can comprise an over-temperature protection unit, a brownout lock cell and starts circuit for detecting.
This over-temperature protection unit, in order to the temperature of detecting battery balanced charging controller 100, after this temperature surpassed an overheat protector temperature, this over-temperature protection unit produced an overheat protector signal, to avoid battery balanced charging controller 100 overheated damages.
This brownout lock cell, couple the anode of this first battery BAT1 and the negative terminal of this second battery BAT2, when this two ends potential difference is lower than a predetermined starting resistor, this brownout lock cell produces a brownout signal, when avoiding operating voltage not enough, battery balanced charging controller 100 malfunctions.
This starts circuit for detecting, starts this battery balanced charging controller 100 after receiving the enabling signal EA of a high levle, just moves when this first battery BAT1 and this second battery BAT2 enter charged state to guarantee battery balanced charging controller 100.Therefore, when enabling signal EA (or enabling signal EA is a low level) was not arranged, battery balanced charging controller 100 was interior for closing (Off) state, battery balanced charging controller 100 power consumption hardly.So non-when the charged state of battery, battery balanced charging controller 100 can not consume the electric power of battery, and goodish energy-saving advantages is arranged.
This NAND gate 120, couple this processing unit 105 and this first comparator 110, switching with this first switch of signal controlling Q1 of being exported according to this processing unit 105 and this first comparator 110, and cross low and damage this first switch Q1 for fear of the signal level that this NAND gate 120 is exported, this NAND gate 120 can be connected in a voltage Vr1 who is higher than this second battery BAT2 negative terminal voltage, to avoid exporting the signal of low level.
Be somebody's turn to do and door 125, couple this processing unit 105 and this second comparator 115, switching with this second switch of signal controlling Q2 of being exported according to this processing unit 105 and this second comparator 115, and it is too high and damage this second switch Q2 for fear of this and door 125 signal level of being exported, should can be connected in an operating voltage Vr2 who is lower than the positive terminal voltage of this first battery BAT1 with door 125, to avoid exporting the signal of high levle.
For avoid this first switch Q1 and this second switch Q2 simultaneously this first switch Q1 of conducting and this second switch Q2 big electric current of flowing through damage, battery balanced charging controller 100 can comprise a time delay cell, couple this balancing circuitry and this switch module, the time point of arbitrary conducting of this first switch Q1 and this second switch will be later than more than one scheduled time of another time point that the ends length, can avoid the problem of switch conducting simultaneously.
Specify the operational scenario of battery balanced charging controller 100 of the present invention below.When enabling signal EA is a high levle, when representing this first battery BAT1 of this battery module and this second battery BAT2 to enter charged state, this processing unit 105 can judge whether the voltage difference of first end (i.e. the anode of first battery) of this battery module and second end (i.e. the negative terminal of second battery) is lower than the temperature high abnormality of mistake whether of being scheduled to starting resistor and battery balanced charging controller 100.If all normally then this processing unit 105 send the high levle signal battery balanced charging controller 100 come into operation, otherwise send the running that the low level signal stops battery balanced charging controller 100.
Suppose that this first battery BAT1 to be charged and this second battery BAT2 are lithium battery, rated voltage is 3.7V, and voltage is 4.2V when being full of electricity, and the voltage of this first battery BAT1 and this second battery BAT2 is respectively 2.8V and 2.5V at present.When this battery module place cradle when charging, the voltage that this battery module provides be 5.3V (=2.8V+2.5V), therefore should go up reference potential V+ and be
This time reference potential V-is
Wherein, R1: R2: R 3=100: 1: 100.At this moment, the voltage signal DET of the tie point of this first battery BAT1 and this second battery BAT2 is 2.5V, so one first comparison signal of this first comparator 110 output high levles and one second comparison signal of these second comparator, 115 output low levels.Without any under the abnormality, this processing unit 105 is also exported a high levle signal, so, should this second switch Q2 (is N type metal-oxide half field effect transistor at present embodiment) be ended with door 125 output low level signals, and this NAND gate 120 output low level signals make this first switch Q1 (is P type metal-oxide half field effect transistor at present embodiment) conducting, make an equilibrium charging electric current this first switch Q1 that flows through.So, the charging current of this first battery BAT1 that will more higher cell voltage than this second battery BAT2 of low battery voltages is a many equilibrium charging electric current, the cell voltage of two batteries so charging process can further gradually.When above-mentioned example is lower than this time reference potential V-for the current potential DET of this tie point, this equilibrium charging electric current this first switch Q1 that can flow through, and when the current potential DET of this tie point is higher than on this reference potential V+, represent the cell voltage of this first battery lower, this equilibrium charging electric current this second switch Q2 that can flow through.
Because the present invention is a dividing potential drop of utilizing resistance, producing reference potential according to the ratio of the resistance value of resistance need to judge whether this equilibrium charging electric current to come equilibrium charging, so after the difference of the cell voltage of this first battery BAT1 and this first battery BAT2 approaches to a predetermined percentage, battery balanced charging controller 100 will be by this first switch Q1 and this second switch Q2, in above-mentioned example, this predetermined percentage is 1%.
When the cell voltage of this first battery BAT1 and this second battery BAT2 in charging process; when this switch module or other factors cause the temperature of battery balanced charging controller 100 to be higher than predetermined overheat protector temperature because this equilibrium charging electric current is flowed through, circuit abnormality makes the operating voltage of battery balanced charging controller 100 be lower than predetermined starting resistor or enabling signal EA is transformed into states such as low level, this processing unit 105 will be exported a low level signal and stop this battery balanced charging controller and remove until above-mentioned state.Because some noises on the circuit may make the current potential DET of this tie point be lower than this time reference potential V-and be higher than reference potential V+ on this simultaneously, and cause this first switch Q1 and this second switch Q2 conducting simultaneously.Therefore, battery balanced charging controller 100 can increase the time delay unit of being made up of a very first time delayer 130 and one second time delay device 135, avoids the problem of this first switch Q1 and this second switch Q2 conducting simultaneously.When these NAND gate 120 output low level signals make this first switch Q1 conducting, to make this and door 125 output low level signals that this second switch Q2 is ended, until these NAND gate 120 output high levles this first switch Q1 is ended, and behind a scheduled delay of this very first time delayer 130, should just may export the high levle signal with door 125 and make this second switch Q2 conducting.In the same manner, when this makes this second switch Q2 conducting with door 125 output high levle signals, to make these NAND gate 120 output high levle signals that this first switch Q1 is ended, until this with the door 125 output low levels make this first switch Q1 by and behind the scheduled delay of this second time delay device 135, this NAND gate 120 just may be exported the low level signal and make this first switch Q1 conducting.So, it is above and avoid the problem of conducting simultaneously that the time point that can guarantee arbitrary conducting of this first switch Q1 and this second switch Q2 will be later than one scheduled time of another time point that ends length.
Battery balanced charging controller 100 of the present invention not only can be used in the usefulness of two series connected battery equilibrium chargings, also can be applied to the usefulness of three or above series connected battery equilibrium charging simultaneously.When (N+1) individual battery unit that connects with the series connection form is arranged in the battery module, can use N battery balanced charging controller, make any two battery units that are connected all have a battery balanced charging controller to come equilibrium charging.
Seeing also shown in Figure 3ly, is the circuit diagram of the battery module of built-in battery balanced charging controller of the present invention.The battery module of built-in battery balanced charging controller of the present invention is to be that example describes with the battery module that three battery units are formed in this embodiment.First battery balanced charging controller 100a is coupled to the anode of one first battery unit BAT1, the negative terminal of one second battery unit BAT2 and the tie point of two battery units.Second battery balanced charging controller 100b is coupled to the anode of this second battery unit BAT2, the negative terminal of one the 3rd battery unit BAT3 and the tie point of two battery units.When battery module charged, enabling signal EA was that high levle is to start first battery balanced charging controller 100a and second battery balanced charging controller 100b.First battery balanced charging controller 100a is the cell voltage height of this first battery unit BAT1 and this second battery unit BAT2 relatively, be higher than low cell potential one predetermined percentage when above when a higher cell potential of two battery units, the meeting conducting switch in parallel with the battery unit of this higher cell potential extremely should be than the battery unit of low cell potential with conducting one equilibrium charging electric current.Simultaneously, second battery balanced charging controller 100b also carries out the comparison of the cell voltage of this second battery unit BAT2 and the 3rd battery unit BAT3, this equilibrium charging electric current flow to wherein be lower than the above battery unit than low cell potential of predetermined percentage.So, in the time of can making the battery module of built-in battery balanced charging controller of the present invention can guarantee that each battery unit all can be full of electric energy, and more general battery module has the service efficiency of higher battery module and long service time.
The above, it only is preferred embodiment of the present invention, be not that the present invention is done any pro forma restriction, though the present invention discloses as above with preferred embodiment, yet be not in order to limit the present invention, any those skilled in the art, in not breaking away from the technical solution of the present invention scope, when the technology contents that can utilize above-mentioned announcement is made a little change or is modified to the equivalent embodiment of equivalent variations, in every case be not break away from the technical solution of the present invention content, according to technical spirit of the present invention to any simple modification that above embodiment did, equivalent variations and modification all still belong in the scope of technical solution of the present invention.
Claims (18)
1, a kind of battery balanced charging controller, charging in order to balance one first battery and one second battery, one negative terminal of this first battery and an anode of second battery electrically connect to form a tie point, one anode of this first battery forms one first end, one anode of this second battery forms one second end, it is characterized in that this battery balanced charging controller comprises:
One bleeder mechanism is coupled between this first end and this second end, and reference potential reaches reference potential on one to provide, and reference potential is higher than this time reference potential on this;
One switch module comprises one first switch and a second switch, and this first switch couples this first end and this tie point, and this second switch couples this second end and this tie point; And
One balancing circuitry couples this tie point, this bleeder mechanism and this switch module, this balancing circuitry according to this tie point current potential, on this reference potential and this time reference potential to determine an equilibrium charging electric current whether flow through this first switch or this second switch.
2, battery balanced charging controller according to claim 1, it is characterized in that wherein said balancing circuitry comprises one first comparator and one second comparator, this first comparator receives the current potential of this time reference potential and this tie point, to export one first comparison signal, this second comparator receives the current potential of reference potential and this tie point on this, to export one second comparison signal, this balancing circuitry produces one first control signal and one second control signal to control this first switch and this second switch according to this first comparison signal and this second comparison signal, when the current potential of this tie point is lower than this time reference potential, this equilibrium charging electric current this first switch of flowing through, and the current potential of this tie point is when being higher than on this reference potential, this equilibrium charging electric current this second switch of flowing through.
3, battery balanced charging controller according to claim 2 is characterized in that it also comprises a resistance and couples this tie point and this switch module.
4, battery balanced charging controller according to claim 2, it is characterized in that it more comprises a brownout lock cell and couples this first end and this second end, when the potential difference of this first end and this second end is lower than a predetermined starting resistor, this brownout lock cell produces a brownout signal, to stop the operation of this battery balanced charging controller.
5, battery balanced charging controller according to claim 2, it is characterized in that wherein said bleeder mechanism comprises one first resistance of series connection, one second resistance and one the 3rd resistance, this first resistance couples this first end, the 3rd resistance couples this second end, this second resistance couples this first resistance and should go up reference potential and couple the 3rd resistance producing this time reference potential to produce, and the resistance value of equal and this second resistance of the resistance value of this first resistance and the 3rd resistance is less than the resistance value of this first resistance.
6, battery balanced charging controller according to claim 2, it is characterized in that it more comprises a time delay cell, couple this balancing circuitry and this switch module, the time point of arbitrary conducting of this first switch and this second switch will be later than more than one scheduled time of another time point that the ends length.
7, battery balanced charging controller according to claim 2; it is characterized in that it more comprises an over-temperature protection unit; in order to detect the temperature of this battery balanced charging controller; after this temperature surpassed an overheat protector temperature, this over-temperature protection unit can stop this battery balanced charging controller operation when producing an overheat protector signal.
8, battery balanced charging controller according to claim 2 is characterized in that it more comprises one and starts circuit for detecting, starts this battery balanced charging controller after receiving an enabling signal.
9, a kind of battery module is characterized in that it comprises:
(N+1) individual battery unit should electrically connect with the series connection form by (N+1) individual battery unit each other, and wherein N is the integer greater than zero; And
N battery balanced charging controller, wherein N battery balanced charging controller is coupled to N battery unit of series connection and one first end of (N+1) individual battery unit, one second end and a tie point, and this N battery balanced charging controller is according to this first end, this second end and this tie point are judged the cell potential of this N battery unit and this (N+1) individual battery unit, and being higher than low cell potential one predetermined percentage when above at the higher cell potential of N battery unit and this (N+1) individual battery unit, conducting one equilibrium charging electric current is to the battery unit that should hang down cell potential.
10, battery module according to claim 9, it is characterized in that wherein said each this battery balanced charging controller comprises one first comparator and one second comparator, this first comparator receives the current potential of reference potential and this tie point to export one first comparison signal, the current potential of reference potential and this tie point is to export one second comparison signal in this second comparator reception one, and whether this battery balanced charging controller produces this equilibrium charging electric current according to this first comparison signal and this second comparison signal with decision.
11, battery module according to claim 10, it is characterized in that wherein said each this battery balanced charging controller more comprises a bleeder mechanism, couple this first end and this second end, so that reference potential and this time reference potential on this to be provided, be higher than this time reference potential and should go up reference potential.
12, battery module according to claim 11, it is characterized in that wherein said bleeder mechanism comprises one first resistance of series connection, one second resistance and one the 3rd resistance, this first resistance couples this first end, the 3rd resistance couples this second end, this second resistance couples this first resistance and should go up reference potential and couple the 3rd resistance producing this time reference potential to produce, and the resistance value of equal and this second resistance of the resistance value of this first resistance and the 3rd resistance is less than the resistance value of this first resistance.
13, battery module according to claim 10, it is characterized in that wherein said each this battery balanced charging controller more comprises a switch module, it comprises one first switch and a second switch, this first switch couples this first end and this tie point, this second switch couples this second end and this tie point, and this battery balanced charging controller determines this equilibrium charging electric current flow through this first switch or this second switch according to this first comparison signal and this second comparison signal.
14, battery module according to claim 13, it is characterized in that wherein said each this battery balanced charging controller more comprises a time delay cell, make the time point of arbitrary conducting of this first switch and this second switch will be later than another time point that ends more than one scheduled time.
15, battery module according to claim 10 is characterized in that wherein said each this battery balanced charging controller couples this tie point by a resistance.
16, battery module according to claim 10, it is characterized in that wherein said each this battery balanced charging controller more comprises a brownout lock cell, couple this first end and this second end, when the potential difference of this first end and this second end was lower than a predetermined starting resistor, this brownout lock cell can stop this battery balanced charging controller when producing a brownout signal.
17, battery module according to claim 10; it is characterized in that wherein said each this battery balanced charging controller more comprises an over-temperature protection unit; in order to detect the temperature of this battery balanced charging controller; after this temperature surpassed an overheat protector temperature, this over-temperature protection unit can stop this battery balanced charging controller operation when producing an overheat protector signal.
18, battery module according to claim 10 is characterized in that wherein said each this battery balanced charging controller more comprises one and starts circuit for detecting, starts this battery balanced charging controller after receiving an enabling signal.
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| CN200810125767A CN101615810A (en) | 2008-06-25 | 2008-06-25 | Battery balanced charging controller and battery module thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN200810125767A CN101615810A (en) | 2008-06-25 | 2008-06-25 | Battery balanced charging controller and battery module thereof |
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| CN101615810A true CN101615810A (en) | 2009-12-30 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102332619A (en) * | 2011-09-28 | 2012-01-25 | 上海交通大学 | Controllable battery module |
| CN103329390A (en) * | 2011-01-20 | 2013-09-25 | 威伦斯技术公司 | Rechargeable battery systems and rechargeable battery system operational methods |
| CN104659874A (en) * | 2013-11-22 | 2015-05-27 | 余仲哲 | Battery Balance Control Circuit And System Thereof |
| US10056764B2 (en) | 2011-01-20 | 2018-08-21 | Lithium Werks B.V. | Rechargeable battery systems and rechargeable battery system operational methods |
| CN116488311A (en) * | 2023-06-25 | 2023-07-25 | 连云港鸿云实业有限公司 | Ship battery pack control system |
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2008
- 2008-06-25 CN CN200810125767A patent/CN101615810A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103329390A (en) * | 2011-01-20 | 2013-09-25 | 威伦斯技术公司 | Rechargeable battery systems and rechargeable battery system operational methods |
| CN103329390B (en) * | 2011-01-20 | 2016-02-24 | 威伦斯技术公司 | Chargeable cell system and rechargeable battery system operational |
| US10056764B2 (en) | 2011-01-20 | 2018-08-21 | Lithium Werks B.V. | Rechargeable battery systems and rechargeable battery system operational methods |
| US10903661B2 (en) | 2011-01-20 | 2021-01-26 | Lithium Werks Technology Bv | Rechargeable battery systems and rechargeable battery system operational methods |
| US11616375B2 (en) | 2011-01-20 | 2023-03-28 | Lithion Battery Inc. | Rechargeable battery systems and rechargeable battery system operational methods |
| CN102332619A (en) * | 2011-09-28 | 2012-01-25 | 上海交通大学 | Controllable battery module |
| CN102332619B (en) * | 2011-09-28 | 2015-01-14 | 上海交通大学 | Controllable battery module |
| CN104659874A (en) * | 2013-11-22 | 2015-05-27 | 余仲哲 | Battery Balance Control Circuit And System Thereof |
| CN116488311A (en) * | 2023-06-25 | 2023-07-25 | 连云港鸿云实业有限公司 | Ship battery pack control system |
| CN116488311B (en) * | 2023-06-25 | 2023-08-29 | 连云港鸿云实业有限公司 | Ship battery pack control system |
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Open date: 20091230 |