CN202817832U - Battery charging device with functions of energy transfer and charging balancing - Google Patents
Battery charging device with functions of energy transfer and charging balancing Download PDFInfo
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- CN202817832U CN202817832U CN201220472325.6U CN201220472325U CN202817832U CN 202817832 U CN202817832 U CN 202817832U CN 201220472325 U CN201220472325 U CN 201220472325U CN 202817832 U CN202817832 U CN 202817832U
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Abstract
The utility model discloses a battery charging device with the functions of energy transfer and charging balancing. The battery charging device with the functions of energy transfer and charging balancing comprises an MCU, a drive unit and a booster module. The MCU is connected with batteries and the drive unit. The drive unit is connected with the batteries through the booster module. In the process of charging, the MCU detects the total voltage value of all batteries and the voltage value of a single battery. The average voltage value is calculated according to the total voltage value and is compared with the voltage value of a single battery. When the voltage value of a single battery is greater than or equal to a preset value, an enable signal is output to the drive unit and is converted to a drive signal by the drive unit to start the booster unit corresponding to the single battery. The booster unit charges the subordinate single battery of the single battery, thus excess electric energy of the single battery is transferred into the adjacent single battery with lower electric energy. After several times of charging cycle, the voltage values of all single batteries tend to be consistent. Energy transfer is adopted to balance the battery capacity, thus the service lives of the batteries are ensured.
Description
Technical field
The utility model relates to the battery technology field, particularly a kind of battery charger with energy transfer equalizing charge function.
Background technology
Along with the development of battery industry, lithium battery is applicable to the various fields such as mobile phone, computer, electric motor car owing to have the advantages such as security performance is good, capacity is large, shape is customizable.Battery pack is comprised of a plurality of cell serial or parallel connections, is widely used in people's life with its larger capacity.
At present, battery adopts the mode of constant current, constant voltage to charge mostly.Because the charging curve of lithium battery is more special, overcharges with the overdischarge meeting it is caused damage.In addition, when concentrating charging before in engineering is used, needing a plurality of cells or battery pack dispatched from the factory, because the performance parameter of each battery cell or battery pack is inconsistent, when charging, there are the differences such as ability to accept, self-discharge rate, capacity attenuation speed between each cell, can cause the rechargeable energy of each cell inconsistent.And the quantity of electric charge gap that each cell in the battery pack stores is with increasing, be divergent trend, the easy like this discreteness of the cell of battery pack inside that causes increases, even the performance degradation of cells can aggravate individually, and then causes whole battery pack to lose efficacy.As time goes on the balance phenomenon that above-mentioned situation causes can aggravate gradually, has had a strong impact on the life and reliability of battery, and has not paid close attention to too much this problem in the current charging technique.
Therefore, how to realize that the energy content of battery shifts the equalizing charge technology, cell is not overcharged and overdischarge, become important breakthrough and the necessary means of lithium cell charging technology.
The utility model content
In view of above-mentioned the deficiencies in the prior art part, the purpose of this utility model is to provide a kind of battery charger that energy shifts the equalizing charge function that has, can progressively reduce the inconsistency between the cell, guarantee that the voltage of all cells along with charge and discharge cycles converges to stationary value, reaches the purpose of balance charge/discharge.
In order to achieve the above object, the utility model has been taked following technical scheme:
A kind of battery charger with energy transfer equalizing charge function, it comprises:
For detection of the magnitude of voltage of the total voltage value of all batteries and cell, calculate average voltage level, the magnitude of voltage of average voltage level and cell is compared and export corresponding enable signal to the MCU of driver element according to the result of comparison according to the total voltage value;
Be used for converting the enable signal of input to drive signal and export boost module to driver element;
Be used for the boost module according to the driving signal controlling cell charge or discharge of input;
Described MCU connects battery and driver element, and described driver element connects battery by boost module.
Described have energy and shift in the battery charger of equalizing charge function, and described MCU comprises:
For detection of the total voltage value of all batteries, and calculate average voltage level, described average voltage level be transferred to the MCU control unit of detection module according to described total voltage value;
For detection of the magnitude of voltage of cell, and with the average voltage level comparison of described MCU control unit input, export corresponding enable signal to the detection module of driver element according to result relatively;
Described MCU control unit connects battery and driver element by detection module.
Described have energy and shift in the battery charger of equalizing charge function, and all batteries comprise three cells, are respectively the first battery, the second battery and the 3rd battery.
Described have energy and shift in the battery charger of equalizing charge function, and described detection module comprises the first detecting unit, the second detecting unit and the 3rd detecting unit;
The 1st end of described the first detecting unit, the 1st end of the second detecting unit, the 1st end of the 3rd detecting unit connects driver element, the 3rd end of the first detecting unit, the 3rd end of the second detecting unit, the 3rd end of the 3rd detecting unit connects the MCU control unit, the 4th end of the first detecting unit connects the 2nd end of the second detecting unit, the positive pole of the first battery, the negative pole of the second battery and boost module, the equal ground connection of negative pole of the 2nd end of the first detecting unit and the first battery, the 4th end of the second detecting unit connects the 2nd end of the 3rd detecting unit, the positive pole of the second battery, the negative pole of the 3rd battery and boost module, the 4th end of described the 3rd detecting unit connects the positive pole of the 3rd battery, boost module and MCU control unit.
Described have energy and shift in the battery charger of equalizing charge function, and described boost module comprises the first boosting unit, the second boosting unit and is used for the final stage control unit of the magnitude of voltage of control the 3rd battery;
The 1st end of described the first boosting unit, the 1st end of the second boosting unit connect driver element, the 2nd end ground connection of the first boosting unit, the 3rd end of the first boosting unit connects the 2nd end of the second boosting unit, the positive pole of the first battery and the negative pole of the second battery, the 4th end of the first boosting unit connects the 3rd end of the second boosting unit, the positive pole of the second battery and the negative pole of the 3rd battery, the 4th end of the second boosting unit connects the positive pole of the 3rd battery, and the positive pole of described the 3rd battery also connects the 4th end of final stage control unit and the 3rd detecting unit.
Described have energy and shift in the battery charger of equalizing charge function, and described final stage control unit comprises diode, transformer and switching circuit;
The Same Name of Ends of the primary coil of described transformer connects the positive pole of the 3rd battery and the 4th end of the 3rd detecting unit, the 3rd end of the different name end connecting valve circuit of described primary coil, the Same Name of Ends ground connection of the secondary coil of transformer, the different name end of described secondary coil connects the positive pole of diode, the negative pole of described diode connects the negative pole of the 3rd battery, the 2nd end of described switching circuit connects the 3rd end of the second booster circuit, and the 1st end of switching circuit connects driver element.
Described have energy and shift in the battery charger of equalizing charge function, and described detection module also comprises the first resistance, the second resistance, the 3rd resistance, the 4th resistance, the 5th resistance and the 6th resistance;
One end of described the first resistance connects the 5th end of the first detecting unit, also by the second grounding through resistance, the other end of the first resistance connects the 4th end of the first detecting unit, the negative pole of the positive pole of the first battery and the second battery, the 5th end that also connects the second detecting unit by the 4th resistance, one end of the 3rd resistance connects the 5th end of the second detecting unit, the other end connects the positive pole of the second battery and the negative pole of the 3rd battery, the 5th end that also connects the 3rd detecting unit by the 6th resistance, an end of the 5th resistance connects the 5th end of the 3rd detecting unit, the other end connects the 4th end of the 3rd detecting unit and the positive pole of the 3rd battery.
Described have energy and shift in the battery charger of equalizing charge function, and the 4th end of described the 3rd detecting unit connects an end of the first protective resistance, and the other end of the first protective resistance connects the MCU control unit, also by the second protective resistance ground connection.
Described have energy and shift in the battery charger of equalizing charge function, and described battery is cell or battery pack.
Compared to prior art, the battery charger with energy transfer equalizing charge function that the utility model provides, in charging process, detect the total voltage value of all batteries and calculate average voltage level by MCU, compare with the magnitude of voltage of each cell that detects, when the voltage difference of the magnitude of voltage of a certain cell wherein and average voltage level is exported corresponding enable signal to driver element during more than or equal to preset value, by the corresponding corresponding boosting unit of this cell of signal enabling that drives of driver element output, by this boosting unit output HIGH voltage to subordinate's cell of this a certain cell it is boosted, namely finished will this a certain cell unnecessary electric energy transfer in the lower subordinate's cell of electric energy.So charging cycle makes the magnitude of voltage of each cell converge to stationary value several times afterwards, reaches the purpose of balancing battery capacity by balancing battery voltage, has effectively solved the problem that battery damages, shorten useful life that balance phenomenon causes.
Description of drawings
Fig. 1 the utlity model has the structured flowchart that energy shifts the battery charger of equalizing charge function.
Fig. 2 the utlity model has the circuit diagram that energy shifts the battery charger embodiment one of equalizing charge function.
Fig. 3 the utlity model has the circuit diagram that energy shifts the battery charger embodiment two of equalizing charge function.
Embodiment
The utility model provides a kind of battery charger that energy shifts the equalizing charge function that has, and is clearer, clear and definite for making the purpose of this utility model, technical scheme and effect, referring to the accompanying drawing embodiment that develops simultaneously the utility model further described.Should be appreciated that specific embodiment described herein only in order to explaining the utility model, and be not used in restriction the utility model.
The battery charger with energy transfer equalizing charge function that the utility model provides, cause the unbalanced problem of battery capacity owing to battery self performance parameter difference when being intended to solve charging, because battery capacity unbalanced is embodied directly on the height of battery voltage value, when the batteries charging that forms to a plurality of cells or by a plurality of cells, adopt between the adjacent cell part that electric energy is high to transfer to and realize on the low battery of electric energy that energy shifts equalizing charge.For the ease of understanding, the battery pack that forms with a plurality of cells or by a plurality of cells when setting forth structured flowchart of the present utility model is referred to as battery.Please consult simultaneously Fig. 1 and Fig. 2, described battery charger comprises MCU100, driver element 200, battery 300 and boost module 400.Described MCU100 connects battery 300 and driver element 200, and described driver element 200 connects battery 300 by boost module 400.
Wherein, described MCU100 comprises MCU control unit 110 and detection module 120.Described MCU control unit 110 is for detection of the total voltage value U of all batteries
Tot, and according to total voltage value U
TotCalculate average voltage level U with the number of cell
Avg, again with described average voltage level U
AvgBe transferred to detection module 120.Described detection module 120 comprises a plurality of detecting units, and its number is identical with the number of battery 300 interior cells, i.e. detecting unit of a cell coupling.Described detecting unit represents the sequence number of cell for detection of the magnitude of voltage Ux(x of the cell corresponding with it, magnitude of voltage such as the first battery is exactly U1, the magnitude of voltage of the second battery is exactly U2, and x is natural number), and with the average voltage level U of described MCU control unit 110 inputs
AvgCompare with the magnitude of voltage Ux of cell.And each detecting unit can output enable signal to driver element, but only has magnitude of voltage Ux and the average voltage level U that judges the cell that it is corresponding when detecting unit
AvgPressure reduction more than or equal to preset value ε (ε is rational), i.e. Ux-U
AvgDuring 〉=ε, just effective from the enable signal PWx that the 1st end of detecting unit is exported.In the specific implementation process, the size of preset value ε determines that by manufacturer or designer can arrange according to the capacity requirement of different batteries, client's demand, the needs of design studies, the utility model is not construed as limiting this.
Described driver element 200 is used for the enable signal PWx of input is converted to driving signal PWMx and exports boost module 400 to.Described boost module 400 comprises a plurality of boosting units and a final stage control unit, and each boosting unit is used for according to discharging and recharging or inoperation between the driving signal PWMx control of its 1st end input two adjacent cells corresponding with it.When driving signal PWMx is effective, just start boosting unit or final stage control unit, then inoperation when invalid.The final stage control unit is used for the rechargeable electrical energy of last cell is regulated.
Present embodiment one is (being that all batteries comprise three cells) take battery 300 as three cells, is respectively that the first battery BT1(namely is first cell), the second battery BT2(namely is second cell) and the 3rd battery BT3(namely be the 3rd cell) elaborate the battery charger that the utility model provides for example.The detecting unit that present embodiment one also need arrange in the detection module 120 according to the number of cell also is three, is respectively the first detecting unit, the second detecting unit and the 3rd detecting unit; The boosting unit that arranges in the boost module 400 according to two adjacent cells of a boosting unit control is two, is respectively the first boosting unit and the second boosting unit.
Wherein, the 1st end of described the first detecting unit, the 1st end of the second detecting unit, the 1st end of the 3rd detecting unit connects driver element, the 3rd end of the first detecting unit, the 3rd end of the second detecting unit, the 3rd end of the 3rd detecting unit connects the MCU control unit, the 4th end of the first detecting unit connects the 2nd end of the second detecting unit, the positive pole of the first battery BT1, the 3rd end of the first boosting unit in the negative pole of the second battery BT2 and the boost module 400, the equal ground connection of negative pole of the 2nd end of the first detecting unit and the first battery BT1, the 4th end of the second detecting unit connects the 2nd end of the 3rd detecting unit, the positive pole of the second battery BT2, the 3rd end of the second boosting unit in the negative pole of the 3rd battery BT3 and the boost module 400, the 4th end of described the 3rd detecting unit connects the positive pole of the 3rd battery BT3, the 4th end of the second boosting unit in the boost module 400 and MCU control unit 110.
The 1st end of described the first boosting unit, the 1st end of the second boosting unit connects driver element, the 2nd end ground connection of the first boosting unit, the 3rd end of the first boosting unit connects the 2nd end of the second boosting unit, the negative pole of the positive pole of the first battery BT1 and the second battery BT2, the 4th end of the first boosting unit connects the 3rd end of the second boosting unit, the negative pole of the positive pole of the second battery BT2 and the 3rd battery BT3, the 4th end of the second boosting unit connects the positive pole of the 3rd battery BT3, and the positive pole of described the 3rd battery BT3 also connects the 4th end of final stage control unit 410 and the 3rd detecting unit.
Described final stage control unit 410 comprises diode D, transformer T and switching circuit.The Same Name of Ends of the primary coil of described transformer T connects the positive pole of the 3rd battery BT3 and the 4th end of the 3rd detecting unit, the 3rd end of the different name end connecting valve circuit of described primary coil, the Same Name of Ends ground connection of the secondary coil of transformer T, the different name end of described secondary coil connects the positive pole of diode D, the negative pole of described diode D connects the negative pole of the 3rd battery BT3, the 2nd end of described switching circuit connects the 3rd end of the second booster circuit, and the 1st end of switching circuit connects driver element 200.Wherein, described switching circuit can be MOSFET(Metal-Oxide-Semiconductor Field-Effect Transistor, metal-oxide layer-semiconductor-field-effect transistor) pipe or the switching tube of other types.Because the inside of switching circuit is not conducting at ordinary times, causes its 3rd end to be in vacant state, makes its conducting when can start this switching circuit when its 1st end is inputted a useful signal, just have electric current to flow through this moment in transformer T, produces electromagnetic induction.
Further, for the ease of detecting in real time the voltage at the first battery BT1, the second battery BT2 and the 3rd battery BT3 two ends, the method of electric resistance partial pressure be can adopt, the first resistance R 1, the second resistance R 2, the 3rd resistance R 3, the 4th resistance R 4, the 5th resistance R 5 and the 6th resistance R 6 increased.One end of described the first resistance R 1 connects the 5th end of the first detecting unit, also by the second resistance R 2 ground connection, the other end of the first resistance R 1 connects the 4th end of the first detecting unit, the negative pole of the positive pole of the first battery BT1 and the second battery BT2, the 5th end that also connects the second detecting unit by the 4th resistance R 4, one end of the 3rd resistance R 3 connects the 5th end of the second detecting unit, the other end connects the positive pole of the second battery BT2 and the negative pole of the 3rd battery BT3, also connect the 5th end of the 3rd detecting unit by the 6th resistance R 6, an end of the 5th resistance R 5 connects the 5th end of the 3rd detecting unit, the other end connects the 4th end of the 3rd detecting unit and the positive pole of the 3rd battery BT3.The ADC signal of the 5th end input of the 5th end by the first detecting unit, the 5th end of the second detecting unit, the 3rd detecting unit, the first battery BT1, the second battery BT2 that can will detect and the magnitude of voltage of the 3rd battery BT3, and be digital signal by analog signal conversion, be convenient in detecting unit, compare.
In embodiment one, the 1st end of the 1st end of the first detecting unit, the 1st end of the second detecting unit, the 3rd detecting unit difference output enable signal PW1, PW2, PW3 are to driver element 200.Convert enable signal PW1, PW2, PW3 to driving signal PWM1, PWM2, PWM3 by this driver element 200, and input respectively the 1st end of the first boosting unit, the 1st end of the second boosting unit, the 1st end of switching circuit.
In order to limit large electric current, to prevent from overcharging; present embodiment one can also increase the first protective resistance Rcl and the second protective resistance Rpd; the 4th end of described the 3rd detecting unit connects the end of the first protective resistance Rcl, and the other end of the first protective resistance Rcl connects the MCU control unit, also by the second protective resistance Rpd ground connection.
Should be noted in the discussion above that in the engineering of reality is used, generally can charge to the cell more than three or battery pack.Therefore, the corresponding embodiment two that proposes equal conversion of the utility model sees also Fig. 3.For guarantee the first battery BT1, the second battery BT2, the 3rd battery BT3 ..., m-1 battery BTm-1 and m battery BTm(m be natural number) can carry out energy and shift equalizing charge.The unit relative set is as follows: detection module 120 is corresponding comprise the first detecting unit, the second detecting unit, the 3rd detecting unit ..., m-1 detecting unit and m detecting unit.Boost module 410 is corresponding comprise the first boosting unit, the second boosting unit ..., the m-1 boosting unit.The corresponding output enable signal of each detecting unit PW1, PW2, PW3 ..., PWm-1, PWm be to driver element, after the over-drive unit conversion respectively driving signal PWM1 corresponding to output, PWM2, PWM3 ..., PWMm-1 and PWMm to the first boosting unit, the second boosting unit ..., in m-1 boosting unit and the switching circuit.
Described the first detecting unit, the second detecting unit, the 3rd detecting unit ..., the 1st end of m-1 detecting unit and m detecting unit the 3rd end that all connects driver element 200, each detecting unit all connects the MCU control unit.The 2nd termination of removing the first detecting unit is extraterrestrial, the 2nd end of all the other detecting units all connects the 4th end (connect the 4th end of the first detecting unit such as the 2nd end of the second detecting unit, the 2nd end of the 3rd detecting unit connects the 4th end of the second detecting unit) of its previous stage detecting unit.The 4th end of each detecting unit all connects the positive pole (positive pole that connects the second battery BT2 such as the 4th end of the second detecting unit of the cell corresponding with it, the 4th end of the 3rd detecting unit connects the positive pole of the 3rd battery BT3), its the 2nd end connects the negative pole (connect the negative pole of the second battery BT2 such as the 2nd end of the second detecting unit, the 2nd end of the 3rd detecting unit connects the negative pole of the 3rd battery BT3) of the cell corresponding with it.The 2nd termination of removing the first boosting unit is extraterrestrial, the 2nd end of all the other boosting units all connects the 3rd end (connect the 3rd end of the first boosting unit such as the 2nd end of the second boosting unit, the 2nd end of the 3rd boosting unit (not shown) connects the 3rd end of the second boosting unit) of its previous stage boosting unit.The 3rd end of each boosting unit all connects the positive pole (positive pole that connects the second battery BT2 such as the 3rd end of the second boosting unit of the cell corresponding with it, the 3rd end of the 3rd boosting unit connects the positive pole of the 3rd battery BT3), the 4th end of each boosting unit all connects the positive pole (positive pole that connects the 3rd battery BT3 such as the 4th end of the second boosting unit of the rear one-level cell of the cell corresponding with it, the 4th end of the 3rd boosting unit connects the positive pole of the 4th battery (not shown)), the 1st end of each boosting unit is connected the 1st end and is connected driver element 200 with switching circuit.The 4th end of afterbody detecting unit (i.e. m detecting unit) also connects MCU control unit 110; The Same Name of Ends of the primary coil of the anodal connection transformer T of afterbody cell (i.e. m battery BTm).The negative pole of diode D connects the positive pole of penultimate stage cell (i.e. m-1 battery BTm-1).
For the ease of detecting the magnitude of voltage of each cell, can corresponding increase the first resistance R 1, the second resistance R 2, the 3rd resistance R 3 ..., b resistance R b, a resistance R a.Its connected mode specifically sees also Fig. 3.
The below will take the circuit diagram of embodiment two as example, be described in detail operation principle of the present utility model.Please continue to consult Fig. 3, at the first battery to the m battery when charging, the first detecting unit to the m detecting unit in the detection module 120 detects in real time the magnitude of voltage of the first battery to the m battery in whole charging process, and these magnitudes of voltage are transferred to calculates total voltage value U in the MCU control unit 110
TotWith average voltage level U
Avg, with average voltage level U
AvgInput in each detecting unit, each detecting unit is with the magnitude of voltage of its cell corresponding with it that detects and the average voltage level U of input
AvgCompare.
Suppose that the magnitude of voltage that the first detecting unit detects the first battery BT1 is U1, with U1 and U
AvgRelatively big or small, if judge U1-U
Avg〉=ε, then the 1st end output enable signal PW1 of the first detecting unit is to driver element 200, the driving signal PWM1 of output effectively and transfer to the 1st end of the first boosting unit after over-drive unit 200 conversion, start this first boosting unit, the positive pole of the first battery BT1 is exported a high voltage U1
/To the 3rd end of the first boosting unit, the 4th end of the first boosting unit is exported another high voltage U1
oTo the positive pole of the second battery BT2, the second battery BT2 is charged.U1 wherein
oCompare U1
/Height, this mode just are similar to the unnecessary electric energy transfer among the first battery BT1 to the second battery BT2 that is adjacent.For the first battery BT1, be equivalent to discharge, and for the second battery BT2, be equivalent to charging.When U1 drops to U1-U
AvgDuring＜ε, make driving signal PWM1 invalid, then close the first boosting unit, finishing for the first time, energy shifts.
Proceed next stage relatively, judge magnitude of voltage and the average voltage level U of the second battery BT2
AvgSize, work as U2-U
AvgDuring 〉=ε, the 1st end output enable signal PW2 of the second detecting unit is to driver element 200, the driving signal PWM2 that makes output after over-drive unit 200 conversion effectively and transfer to the 1st end of the second boosting unit, start this second boosting unit, the positive pole of the second battery BT2 is exported a high voltage U2
/To the 3rd end of the second boosting unit, the 4th end of the second boosting unit is exported another high voltage U2
oTo the positive pole of the 3rd battery BT3, the 3rd battery BT3 is charged.Energy is transferred to the 3rd battery BT3, until U2-U from the second battery BT2
Avg＜ε makes PWM2 invalid, closes the second boosting unit, and finishing for the second time, energy shifts.
By that analogy, until proceed to the afterbody cell, m battery BTm.Judge its magnitude of voltage Um and average voltage level U
AvgSize, if Um-U
Avg〉=ε, then the 1st end output enable signal PWm of m detecting unit is to driver element 200, the driving signal PWMm that makes output after over-drive unit 200 conversion effectively and transfer to the 1st end of switching circuit, start this switching circuit, the high voltage of m battery BTm arrives the positive pole of m-1 battery BTm-1, the negative pole of m battery BTm by transformer T, diode D.Because therefore the minus earth of the first battery BT1, and the first battery BT1 to the m battery BTm series connection begin the battery pack that m-1 battery BTm-1 to the first battery BT1 tandem compound becomes is charged, namely be equal to m battery BTm greater than average voltage level U
AvgThe battery pack that becomes of part electric energy transfer to the m-1 battery BTm-1 to the first battery BT1 tandem compound in; When the magnitude of voltage Um of m battery BTm drops to Um-U
Avg＜ε then makes PWMm invalid, the closing switch circuit.At this moment, finishing the m time energy shifts.
Said process i.e. the complete process in a balance charge/discharge cycle, adopt this cell that voltage is higher unnecessary voltage, transfer on the relatively low adjacent cell of voltage by boosting unit, through all after dates of several balance charge/discharges, just can be controlled by the charging capacity difference that the inconsistency of cell causes, make the voltage of each cell along with charge and discharge cycles converges to stationary value, guarantee that cell is not overcharged and overdischarge, has guaranteed the useful life of battery.
Be understandable that; for those of ordinary skills; can be equal to replacement or change according to the technical solution of the utility model and utility model design thereof, and all these changes or replacement all should belong to the protection range of the appended claim of the utility model.
Claims (9)
1. one kind has the battery charger that energy shifts the equalizing charge function, it is characterized in that, comprising:
For detection of the magnitude of voltage of the total voltage value of all batteries and cell, calculate average voltage level, the magnitude of voltage of average voltage level and cell is compared and export corresponding enable signal to the MCU of driver element according to the result of comparison according to the total voltage value;
Be used for converting the enable signal of input to drive signal and export boost module to driver element;
Be used for the boost module according to the driving signal controlling cell charge or discharge of input;
Described MCU connects battery and driver element, and described driver element connects battery by boost module.
2. according to claim 1 have a battery charger that energy shifts the equalizing charge function, it is characterized in that described MCU comprises:
For detection of the total voltage value of all batteries, and calculate average voltage level, described average voltage level be transferred to the MCU control unit of detection module according to described total voltage value;
For detection of the magnitude of voltage of cell, and with the average voltage level comparison of described MCU control unit input, export corresponding enable signal to the detection module of driver element according to result relatively;
Described MCU control unit connects battery and driver element by detection module.
3. the battery charger with energy transfer equalizing charge function according to claim 2 is characterized in that all batteries comprise three cells, are respectively the first battery, the second battery and the 3rd battery.
4. the battery charger with energy transfer equalizing charge function according to claim 3 is characterized in that described detection module comprises the first detecting unit, the second detecting unit and the 3rd detecting unit;
The 1st end of described the first detecting unit, the 1st end of the second detecting unit, the 1st end of the 3rd detecting unit connects driver element, the 3rd end of the first detecting unit, the 3rd end of the second detecting unit, the 3rd end of the 3rd detecting unit connects the MCU control unit, the 4th end of the first detecting unit connects the 2nd end of the second detecting unit, the positive pole of the first battery, the negative pole of the second battery and boost module, the equal ground connection of negative pole of the 2nd end of the first detecting unit and the first battery, the 4th end of the second detecting unit connects the 2nd end of the 3rd detecting unit, the positive pole of the second battery, the negative pole of the 3rd battery and boost module, the 4th end of described the 3rd detecting unit connects the positive pole of the 3rd battery, boost module and MCU control unit.
5. the battery charger with energy transfer equalizing charge function according to claim 4 is characterized in that, described boost module comprises the first boosting unit, the second boosting unit and is used for the final stage control unit of the magnitude of voltage of control the 3rd battery;
The 1st end of described the first boosting unit, the 1st end of the second boosting unit connect driver element, the 2nd end ground connection of the first boosting unit, the 3rd end of the first boosting unit connects the 2nd end of the second boosting unit, the positive pole of the first battery and the negative pole of the second battery, the 4th end of the first boosting unit connects the 3rd end of the second boosting unit, the positive pole of the second battery and the negative pole of the 3rd battery, the 4th end of the second boosting unit connects the positive pole of the 3rd battery, and the positive pole of described the 3rd battery also connects the 4th end of final stage control unit and the 3rd detecting unit.
6. the battery charger with energy transfer equalizing charge function according to claim 5 is characterized in that described final stage control unit comprises diode, transformer and switching circuit;
The Same Name of Ends of the primary coil of described transformer connects the positive pole of the 3rd battery and the 4th end of the 3rd detecting unit, the 3rd end of the different name end connecting valve circuit of described primary coil, the Same Name of Ends ground connection of the secondary coil of transformer, the different name end of described secondary coil connects the positive pole of diode, the negative pole of described diode connects the negative pole of the 3rd battery, the 2nd end of described switching circuit connects the 3rd end of the second booster circuit, and the 1st end of switching circuit connects driver element.
7. the battery charger with energy transfer equalizing charge function according to claim 4 is characterized in that described detection module also comprises the first resistance, the second resistance, the 3rd resistance, the 4th resistance, the 5th resistance and the 6th resistance;
One end of described the first resistance connects the 5th end of the first detecting unit, also by the second grounding through resistance, the other end of the first resistance connects the 4th end of the first detecting unit, the negative pole of the positive pole of the first battery and the second battery, the 5th end that also connects the second detecting unit by the 4th resistance, one end of the 3rd resistance connects the 5th end of the second detecting unit, the other end connects the positive pole of the second battery and the negative pole of the 3rd battery, the 5th end that also connects the 3rd detecting unit by the 6th resistance, an end of the 5th resistance connects the 5th end of the 3rd detecting unit, the other end connects the 4th end of the 3rd detecting unit and the positive pole of the 3rd battery.
8. according to claim 4 have a battery charger that energy shifts the equalizing charge function; it is characterized in that; the 4th end of described the 3rd detecting unit connects an end of the first protective resistance, and the other end of the first protective resistance connects the MCU control unit, also by the second protective resistance ground connection.
9. the battery charger with energy transfer equalizing charge function according to claim 1 is characterized in that described battery is cell or battery pack.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220472325.6U CN202817832U (en) | 2012-09-17 | 2012-09-17 | Battery charging device with functions of energy transfer and charging balancing |
Applications Claiming Priority (1)
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103326417A (en) * | 2013-05-07 | 2013-09-25 | 国家电网公司 | Charge-discharge equalization control circuit of battery pack |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103326417A (en) * | 2013-05-07 | 2013-09-25 | 国家电网公司 | Charge-discharge equalization control circuit of battery pack |
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