CN104979883A - Storage battery voltage balance management system - Google Patents
Storage battery voltage balance management system Download PDFInfo
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- CN104979883A CN104979883A CN201510479454.6A CN201510479454A CN104979883A CN 104979883 A CN104979883 A CN 104979883A CN 201510479454 A CN201510479454 A CN 201510479454A CN 104979883 A CN104979883 A CN 104979883A
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Abstract
The invention relates to a storage battery voltage balance management system. The storage battery voltage balance management system is characterized by comprising a charging unit, a plurality of single battery voltage balance units and a voltage balance management control unit, wherein the voltage balance management control unit is used for analyzing the voltage and current of single batteries of a storage battery monitored by the plurality of single battery voltage balance units and judging the voltage balance state of the storage battery so as to control the charging state, discharging state or pause state of the single batteries, thus finally realizing the balance of the voltage of the each section of the storage battery. According to the storage battery voltage balance management system, through the balance management control of the single batteries during charging and discharging of the storage battery, the single batteries of the storage battery are balanced, the overcharging and undercharging can be avoided, and the service life is prolonged.
Description
Technical field
The invention belongs to batteries technical field, particularly relate to a kind of accumulator battery voltage balanced management system.
Background technology
The utilization of power that appears as of batteries opens the new situation, and broken away from the restriction that power equipment is fixing, it is very convenient to use.But need the power consumption equipment of larger electric energy often to need batteries just can satisfy the demands.In use, in batteries there is balanced problem in single battery, and main cause is the inconsistency between single battery.Realize all filling each cell of series-connected batteries, mainly contain following several method at present:
1, an additional equalizing circuit in parallel on each cell of battery pack, to reach the effect of shunting.In such a mode, when certain battery first reach completely fill time, balancer can stop it to overcharge and unnecessary energy is changed into heat energy, continues to charge to the battery of underfill.The method is simple, but can bring the loss of energy, is not suitable for fast charging system.
2, before charging to each monomer one by one by same load discharge to same level, and then carry out constant current charge, to ensure between each monomer equilibrium state comparatively accurately with this.But to batteries, due to the physical difference between individuality, be difficult to reach on all four ideal effect after each monomer deep discharge.Even if reach same effect after electric discharge, in charging process, also there will be new unbalanced phenomena.
3, regularly, sequencing, separately the cell batteries in batteries is detected and uniform charging.When charging to batteries, can ensure that the situation of overcharge or overdischarge can not occur each storage battery in batteries, thus just ensure that each storage battery in batteries is all in normal operating state.
4, use time sharing principle, by control and the switching of switch module, extra electric current is flowed in the relatively low battery of voltage to reach the object of equalizing charge.The method efficiency comparison is high, but controls more complicated.
5, with the voltage parameter of each battery for balanced object, make the voltage resume of each battery consistent.As shown in Figure 2, during equalizing charge, electric capacity is alternately connected with adjacent two batteries by control switch, accepts the charging of high-voltage battery, then to low-voltage battery electric discharge, until the voltage of two batteries reaches unanimity.This kind of equalization methods preferably resolves the unbalanced problem of battery voltage, but the method is mainly used in the less occasion of number of batteries.
6, battery charging equalizing system is configured.This scheme has a lot of equalization methods, but still have problems, there will be time as widely different between battery pack in trickle equilibrium and overcharge, and equalization discharge can only use in the ideal situation, because physical difference is difficult to reach perfect balance, even if reach perfect balance, can reach again new unbalanced in charging process.
Summary of the invention
The object of the present invention is to provide a kind of accumulator battery voltage balanced management system, the simple equilibrium achieving batteries efficiently, both there will not be overcharge, charge less, turn avoid in charge and discharge process and produce new unbalanced, extend the useful life of batteries.
In order to solve the problems of the technologies described above, the present invention is solved by following technical proposals:
A kind of accumulator battery voltage balanced management system, comprising:
Charhing unit, comprises charging module, charges in order to accumulators group;
Some single-unit battery tension balanced units, comprise balance module and communication module, in order to carry out sampling monitoring to the electric current and voltage of single-unit storage battery and to realize charging to single-unit storage battery, discharging or the switching of break-off pattern;
Voltage balance management control unit, comprise control module and communication module, the electric current and voltage in order to the single-unit storage battery of batteries monitored some single-unit battery tension balanced units is analyzed and is judged the electric voltage equalization state of batteries thus control the electric voltage equalization that the charging of single-unit storage battery, electric discharge or park mode finally realize each internode of batteries.
Further, described voltage balance management control unit to the operating mode control method of single-unit storage battery is: the single-unit storage battery that voltage is high carries out discharge mode, the single-unit storage battery that voltage is low carries out charge mode, and when the electric voltage equalization of batteries each internode, each single-unit storage battery carries out pause mode.
Further, described charhing unit also comprises communication module and charge mode is adjustable, and described voltage balance control unit controls the charge mode of charhing unit according to the electric voltage equalization state of each internode of batteries.
Further, the charge mode of described charhing unit adopts quick charge, conventional speeds charging or pulse to repair charge mode according to the unbalanced light and heavy degree of the voltage of batteries respectively.
Further, the control method of described charge mode is:
Fast charge mode is adopted when respectively saving the centrifugal pump < set point A of maximum voltage value and minimum voltage value in storage battery in a batteries;
Pulse is adopted to repair charge mode when respectively saving the centrifugal pump > set point B of maximum voltage value and minimum voltage value in storage battery in b batteries;
Conventional charge mode is adopted when the centrifugal pump of maximum voltage value and minimum voltage value is between set point A and B in each joint storage battery in c batteries.
Further, also comprise temperature monitoring unit in order to monitor the temperature of batteries, whether described voltage balance management control unit exceedes set value calculation according to the temperature of batteries is continued whether to charge to batteries.
Charhing unit, single-unit battery tension balanced unit, communication between temperature monitoring unit and voltage balance management control unit adopt wired or wireless mode.
Beneficial effect of the present invention have following some:
1, by controlling the balanced management of single-unit storage battery during battery charging, employing fill equalization discharge method, make each single-unit storage battery of batteries in working order and charging time all keep in balance, both avoided overcharge, charge less, avoid again producing in charging process new unbalanced, extend useful life;
2, by the control to battery charging unit charge mode, the electric voltage equalization situation according to batteries adopts different charge modes, extends useful life further.
3, by control to battery charging unit, control to continue whether to charge to batteries according to the temperature conditions of batteries, available protecting batteries, avoiding overcharging causes damage to it.
Accompanying drawing explanation
Fig. 1 is systematic schematic diagram of the present invention;
Fig. 2-3 is circuit diagrams of the present invention;
Fig. 4 is flow chart of the present invention.
Embodiment
Below in conjunction with embodiment, the present invention is described in further detail:
The present embodiment is the voltage balance management system of the batteries of the 48V be made up of four joint storage batterys.
Accumulator battery voltage balanced management system as shown in Figure 1, comprising:
Charhing unit, comprises charging module and communication module, charges in order to accumulators group;
4 single-unit battery tension balanced units, comprise balance module and communication module, in order to carry out sampling monitoring to the electric current and voltage of single-unit storage battery and to realize charging to single-unit storage battery, discharging or the switching of break-off pattern;
Temperature monitoring unit is for monitoring the temperature of batteries;
Voltage balance management control unit, comprise control module and communication module, the electric current and voltage in order to the single-unit storage battery of batteries monitored some single-unit battery tension balanced units is analyzed and is judged the electric voltage equalization state of batteries thus control the electric voltage equalization that the charging of single-unit storage battery, electric discharge or park mode finally realize each internode of batteries.
Voltage balance management control unit to the operating mode control method of single-unit storage battery is: the single-unit storage battery that voltage is high carries out discharge mode, the single-unit storage battery that voltage is low carries out charge mode, and when the electric voltage equalization of batteries each internode, each single-unit storage battery carries out pause mode.
Voltage balance control unit controls the charge mode of charhing unit according to the electric voltage equalization state of each internode of batteries, and concrete grammar is:
1) if the electric voltage equalization of each internode of batteries, then the charge mode of slowly high current is adopted;
2) if the voltage of each internode of batteries is unbalanced, then analyze the voltage inequality extent of batteries, if adopt fast charge mode when respectively saving the discrete <0.16V of maximum voltage value and minimum voltage value in storage battery in batteries; If adopt pulse to repair charge mode when respectively saving the discrete >0.25V of maximum voltage value and minimum voltage value in storage battery in batteries; If adopt conventional charge mode when maximum voltage value and minimum voltage value discrete is between 0.16V and 0.25V in each joint storage battery in batteries.
Whether voltage balance control unit exceedes set value calculation according to the temperature of batteries is continued whether to charge to batteries.
Charhing unit, single-unit battery tension balanced unit, communication between temperature monitoring unit and voltage balance management control unit adopt wired or wireless mode.
Fig. 2-3 is the circuit diagram of single single-unit battery tension balanced unit.
A block in Fig. 2 is the Switching Power Supply drive part of this unit charge function.Driving chip is TL3844, and 7 pin, 5 pin are the power supply input pin of this chip; 2 pin are the input pin of its internal arithmetic amplifier, and this circuit does not use, by this pin ground connection; 1 pin is internal arithmetic amplifier output pin, its voltage levels decides the size that its 6 pin exports pulse duty factor, this pin is connected on the collector electrode of the phototriode of optocoupler, the On current of optocoupler phototriode is changed by the size of the input diode electric current of C block input optocoupler, thus change the size of TL3844 the 6th pin output pulse width, to reach the size controlling this unit charging voltage and electric current.3 pin are the On current sampling pin of Q2; current signal is changed into voltage signal by R20 and R14; 3 pin are delivered to after C5 filtering; when On current is excessive in any one-period for Q2; signal voltage on 3 pin will exceed its inner deboost (being generally 1V); its internal circuit will turn off 6 pin pulses and export, thus protects Q2.4 pin are the external pin of its timer internal, R15 and C7 is its external timing element, for 3844 internal circuits provide clock source.8 pin are the external output pin of its inner voltage stabilizing a reference source, for its peripheral circuit provides voltage-reference.
B block in Fig. 2 is that the control axis of this unit discharging function of holding concurrently drives, U2 is microcontroller, it receives the work order coming from main control unit by communication module, and being uploaded to main control unit by gathering the battery information come, 1 pin of R1, R6, C4 and this chip and 5 pin complete the voltage sample to this single battery jointly; R18, R19, C8 and this chip 6 pin complete the sampling to discharging function size of current jointly; 2 pin driving pulses drive the discharging function of the complete cost-element of Q3 by R10, and chip is by the duty ratio of the sampling control Q3 to discharging current, thus the size of controlled discharge electric current.Chip 12 pin, R12, R13, C9 complete the voltage control benchmark of this unit charge function jointly; Chip 10 pin, R16, R17, C11 complete the Current Control benchmark of this unit charge function jointly; The charging voltage of these two these unit charge functions of benchmark co-controlling and the size of electric current, and this unit charge function can be closed.PC2B, R5, Q1, CD2 form the power unit of this unit controls maincenter, and for this control axis provides power supply, the opening and closing of this power supply are controlled by main control unit.VR1, CD3 form 5V voltage regulation unit, for this unit controls maincenter provides 5V power supply.BT1 is wherein certain single battery in 48V battery pack; BTZ1 is 48V battery pack.
C block in Fig. 3 is this unit charge function closed loop feedback part.U3 is LM358, and its inside comprises two operational amplifiers, and 8 pin, 4 pin are its power input port, and 2 pin, 3 pin and 5 pin, 6 pin are the input pin of two operational amplifiers; 2 pin are the input of current feedback benchmark, and 3 pin and R23, C14 are charge current sample input; C12 is negative feedback, 1 pin and D4, R22 export for controlling, its principle is: when charging current is excessive, the current signal that 3 pin samplings come can more than the reference voltage of 2 pin, and now 1 pin exports control voltage and allows the PC1A diode current flow of optocoupler, the conducting of PCIB phototriode, the 1 pin voltage drop of 3844, its 6 pin output duty cycle reduces, thus causes charging current to reduce, and reaches the object controlling charging current.6 pin of LM358, R25, R27 are the input of Voltage Feedback benchmark; 5 pin of R29, R28 and LM358 are the sampling input of Voltage Feedback; R26, C15 form negative feedback; D5 and 7 pin are that Voltage Feedback controls to export.Its principle is: when charging voltage is higher, the voltage that 5 pin samplings come can higher than the reference voltage of 6 pin, now 7 pin meeting output voltages are by PC1A conducting, and then PCIB conducting, the 1 pin voltage of TL3844 reduces, 6 pin output duty cycles reduce, thus cause charging output voltage to reduce, and reach the object controlling charging output voltage.
The operation principle of this unit: balanced unit real-time sampling battery data, and send main control unit to by PORT COM, main control unit carries out com-parison and analysis after receiving these data, if need the higher battery discharge of voltage or the battery charging lower to voltage, then main control unit can send these orders, after balanced unit receives these orders, if charge command, then stop exporting Q3 discharge pulse by program control port 2, export charging by port one 0 and port one 2 again and control reference voltage, thus the pwm pulse allowing 3844 the 6th pin export certain pulsewidth goes to drive Q2 to carry out switch motion, by T1 transformer pressure-reducing, the rectification of Q3 body diode, and the constant current constant voltage of U3 controls, just can start and control the charge function of this balanced unit, and then this batteries is charged.Otherwise, if electric discharge order, then balanced unit can first close port 10 and port one 2, charge function is allowed to stop, and then the pulse output of opening port 2 goes to drive Q3, is boosted by T1, the rectification of Q2 body diode, again through internal control discharging current size, thus achieve the discharging function of balanced unit to this batteries.If what balanced unit received is pause command, then port 2, port one 0 and port one 2 can be closed by balanced unit simultaneously, do not charge, also do not discharge, thus realize the pause function of balanced unit.
Fig. 4 is the workflow diagram of the voltage balance management system of batteries.
First detect the operating state of batteries, the single-unit storage battery that voltage is high carries out discharge mode, and the single-unit storage battery that voltage is low carries out charge mode, and when the electric voltage equalization of batteries each internode, each single-unit storage battery carries out pause mode.Balance route is carried out, the unbalanced problem controlling batteries of high-efficient simple for each single-unit storage battery.
Simultaneously according to the inequality extent of batteries, adjustment charge mode, is specially 1) if the electric voltage equalization of each internode of batteries, then adopt the charge mode of slowly high current; 2) if the voltage of each internode of batteries is unbalanced, then the voltage inequality extent of batteries is analyzed, if adopt fast charge mode when respectively saving the discrete <0.16V of maximum voltage value and minimum voltage value in storage battery in batteries; If adopt pulse to repair charge mode when respectively saving the discrete >0.25V of maximum voltage value and minimum voltage value in storage battery in batteries; If adopt conventional charge mode when maximum voltage value and minimum voltage value discrete is between 0.16V and 0.25V in each joint storage battery in batteries.Adopt 0.16 and 0.25 two set point, for the 48V batteries of 4 joint storage battery compositions, divided the balanced intensity of batteries preferably, corresponding adjustment charge mode, preferably effect is played to the life-span extending batteries.In addition, in charging process, balance module still works and adjusts charging modes until charging complete according to the balanced intensity of batteries, avoids in charging process and produces new unbalanced problem.
Monitor the temperature of batteries, if temperature is greater than 45 DEG C, then stop charging and equalizing system to run, if be not more than 45 DEG C, continuation charging and equalizing system are run simultaneously.Just very easily go wrong after during battery charging, temperature reaches 45 DEG C, termination charging in time and equalizing system are run and can be carried out available protecting to it, avoid damaging.
In a word, the foregoing is only preferred embodiment of the present invention, all equalizations done according to the present patent application the scope of the claims change and modify, and all should belong to the covering scope of patent of the present invention.
Claims (9)
1. an accumulator battery voltage balanced management system, is characterized in that: comprise
Charhing unit, comprises charging module, charges in order to accumulators group;
Some single-unit battery tension balanced units, comprise balance module and communication module, in order to carry out sampling monitoring to the electric current and voltage of single-unit storage battery and to realize charging to single-unit storage battery, discharging or the switching of break-off pattern;
Voltage balance management control unit, comprise control module and communication module, the electric current and voltage in order to the single-unit storage battery of batteries monitored some single-unit battery tension balanced units is analyzed and is judged the electric voltage equalization state of batteries thus control the electric voltage equalization that the charging of single-unit storage battery, electric discharge or park mode finally realize each internode of batteries.
2. accumulator battery voltage balanced management system according to claim 1, it is characterized in that: described voltage balance management control unit to the operating mode control method of single-unit storage battery is: the single-unit storage battery that voltage is high carries out discharge mode, the single-unit storage battery that voltage is low carries out charge mode, and when the electric voltage equalization of batteries each internode, each single-unit storage battery carries out pause mode.
3. accumulator battery voltage balanced management system according to claim 1 and 2, it is characterized in that: described charhing unit also comprises communication module and charge mode is adjustable, described voltage balance control unit controls the charge mode of charhing unit according to the electric voltage equalization state of each internode of batteries.
4. accumulator battery voltage balanced management system according to claim 3, is characterized in that: the charge mode of described charhing unit adopts quick charge, conventional speeds charging or pulse to repair charge mode according to the unbalanced light and heavy degree of the voltage of batteries respectively.
5. accumulator battery voltage balanced management system according to claim 4, is characterized in that: the control method of described charge mode is:
Fast charge mode is adopted when respectively saving the centrifugal pump < set point A of maximum voltage value and minimum voltage value in storage battery in a batteries;
Pulse is adopted to repair charge mode when respectively saving the centrifugal pump > set point B of maximum voltage value and minimum voltage value in storage battery in b batteries;
Conventional charge mode is adopted when the centrifugal pump of maximum voltage value and minimum voltage value is between set point A and B in each joint storage battery in c batteries.
6. accumulator battery voltage balanced management system according to claim 1, it is characterized in that: also comprise temperature monitoring unit in order to monitor the temperature of batteries, whether whether described voltage balance management control unit exceedes set value calculation according to the temperature of batteries is continued charging.
7. accumulator battery voltage balanced management system according to claim 1, is characterized in that: the communication between described single-unit battery tension balanced unit and voltage balance management control unit adopts wireless or wired mode.
8. accumulator battery voltage balanced management system according to claim 3, is characterized in that: the communication between described voltage balance management control unit and charhing unit adopts wireless or wired mode.
9. accumulator battery voltage balanced management system according to claim 6, is characterized in that: the communication between described voltage balance management control unit and temperature monitoring unit adopts wireless or wired mode.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112531800A (en) * | 2019-09-19 | 2021-03-19 | 立锜科技股份有限公司 | Distributed battery balance management method and battery system using same |
| TWI745746B (en) * | 2019-09-11 | 2021-11-11 | 立錡科技股份有限公司 | Distributed battery balance management method and battery system using this method |
| CN114362291A (en) * | 2021-12-16 | 2022-04-15 | 国网江西省电力有限公司检修分公司 | Automatic balancing method for storage battery |
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Application publication date: 20151014 |