CN103825322A - Energy-transfer lossless equalizing charge circuit and method - Google Patents

Energy-transfer lossless equalizing charge circuit and method Download PDF

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Publication number
CN103825322A
CN103825322A CN201410033600.8A CN201410033600A CN103825322A CN 103825322 A CN103825322 A CN 103825322A CN 201410033600 A CN201410033600 A CN 201410033600A CN 103825322 A CN103825322 A CN 103825322A
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module
storage battery
spdt
voltage
pole double
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CN103825322B (en
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杨艺云
张阁
林强
陈显富
肖静
司传涛
肖园园
彭建华
刘金铃
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Beijing Autony Electronic Technology Co ltd
Electric Power Research Institute of Guangxi Power Grid Co Ltd
Nanning Power Supply Bureau of Guangxi Power Grid Co Ltd
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Beijing Autony Electronic Technology Co ltd
Electric Power Research Institute of Guangxi Power Grid Co Ltd
Nanning Power Supply Bureau of Guangxi Power Grid Co Ltd
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries

Abstract

The invention discloses an energy-transfer lossless equalizing charge circuit and a method. The circuit comprises a logical judgment and execution module, a relay network, series-connected batteries, a DC/DC bidirectional constant-current module and a DC bus, wherein the relay network is connected with the series-connected batteries; the logical judgment and execution module is connected with the relay network; and the relay network is also connected with the DC bus via the DC/DC bidirectional constant-current module. The logical judgment and execution module acquires voltage of any battery in the series-connected batteries in real time, whether the voltage value is abnormal is judged, the relay network and the DC/DC bidirectional constant-current module are controlled to carry out lossless equalizing charge according to the judging result, and transition energy during the equalizing process is stored temporarily in the DC bus. According to the energy-transfer lossless equalizing charge circuit and the method, energy can taken from the DC bus to be outputted in a constant current way to a certain battery, energy can also be taken from constant current of the battery to be back to the DC bus, the whole circuit topology adopts a modular design idea, the equalizing effect is improved, and robustness of the system is enhanced.

Description

A kind of energy transfer type non-dissipative equalizing charging circuit and method
Technical field
The present invention relates to battery charging balancing technique field, in particular, a kind of particularly energy transfer type non-dissipative equalizing charging circuit and method.
Background technology
In recent years, energy storage technology development is very fast, can be by meritorious/idle control fast, and significant response load fluctuation, ensures the emergency service that emphasis is loaded under electric power system failure condition.At present compared with the power-supply system that to be lead-acid battery form with UPS of extensive use as emergency power supply, but because volume energy ratio and the weight energy ratio of lead-acid battery are too little, cannot accomplish " large capacity is removable ", also not adopt Intelligent battery management system, make shorter battery life.Along with the performance of lithium ion battery constantly promotes, its energy density is every year with the speed increase of 10%-15%.The specific energy of lithium ion battery has reached 100-160Wh/kg at present, volumetric specific energy has reached 240-350Wh/L, all higher than cadmium nickel, Ni-MH battery, there is high power capacity, high voltage and the feature such as pollution-free, thereby just get more and more people's extensive concerning once coming out.
But the monomer terminal voltage of general battery is generally lower, and the available capacity of whole battery pack can be subject to the impact of minimum capacity cell.If the voltage differences between monomer can not get timely balance and inhibition, this lack of uniformity will constantly be aggravated with the charge and discharge cycles of battery, finally can affect the work of whole battery pack.
In the prior art, common equilibrium is take passive equilibrium and active equalization mode as main.Wherein, passive equilibrium is also referred to as the equilibrium of energy dissipation formula, balanced inefficiency and loss of energy.Traditional active equalization uses inductance or electric capacity for the carrier that energy shifts mostly, realizes energy transmission by the switching of control switch.The shortcomings such as though this kind of active equalization mode has the advantages such as simple in structure, easy to operate, exists euqalizing current uncontrollable, portfolio effect is poor, and reliability is not high.And existing balanced way can not be realized modularized design, can not realize the equilibrium between battery assembly module, so just make to participate in balanced cell number limited.Therefore, the effective battery pack balancing system of design and fabrication has very strong realistic meaning.
Summary of the invention
While the object of the invention is to for existing charged by series storage battery, there is no the not good technical problem of equilibrium or portfolio effect and a kind of energy transfer type non-dissipative equalizing charging circuit and method are provided.
In order to solve problem set forth above, the technical solution used in the present invention is:
A kind of energy transfer type non-dissipative equalizing charging circuit, comprise logic judgement and Executive Module, relay network, series-connected batteries, DC/DC bidirectional constant module and DC bus, described relay network is connected with series-connected batteries, described logic judgement is connected with relay network with Executive Module, and described relay network is also connected with DC bus by DC/DC bidirectional constant module;
The voltage that obtains arbitrary joint storage battery in series-connected batteries that described logic judgement and Executive Module are real-time, judge that this magnitude of voltage is whether in extremely, and carry out non-dissipative equalizing charging according to this judged result control relay network and DC/DC bidirectional constant module, and transition energy in balancing procedure is temporary in DC bus.
According to a preferred embodiment of the invention: described logic judgement comprises interconnective main control module and acquisition module with Executive Module, and described acquisition module is connected with the control input end of relay network and DC/DC bidirectional constant module respectively.
According to a preferred embodiment of the invention: described series-connected batteries comprises multiple storage batterys that both positive and negative polarity is connected successively, described relay network comprises the control switch on the both positive and negative polarity of every joint storage battery of being located at successively series-connected batteries, and first and second single-pole double-throw switch (SPDT), the control end of described control switch, the control end of the first and second single-pole double-throw switch (SPDT)s is all connected with acquisition module, and odd number control switch is also connected with the upper terminal of the first single-pole double-throw switch (SPDT), even number control switch is also connected with the upper terminal of the second single-pole double-throw switch (SPDT), the lower terminal of described the first single-pole double-throw switch (SPDT) is connected with the upper terminal of the second single-pole double-throw switch (SPDT), the lower terminal of described the second single-pole double-throw switch (SPDT) is connected with the upper terminal of the first single-pole double-throw switch (SPDT), the output of described the first single-pole double-throw switch (SPDT) and the second single-pole double-throw switch (SPDT) is all connected with DC/DC bidirectional constant module.
According to a preferred embodiment of the invention: described main control module and acquisition module all adopt the STM32 series microprocessor of ARM framework, described main control module is STM32F107 microprocessor, and described acquisition module is STM32F103 microprocessor.
The present invention also provides a kind of energy transfer type non-dissipative equalizing charging method, comprises the following steps,
S1. the real-time voltage that obtains arbitrary joint storage battery in series-connected batteries of logic judgement and Executive Module;
S2. logic judgement and Executive Module judge that this magnitude of voltage is whether in extremely;
S3. logic judgement is carried out non-dissipative equalizing charging with Executive Module according to output control relay network and the DC/DC bidirectional constant module of judgement, and transition energy in balancing procedure is temporary in DC bus.
According to a preferred embodiment of the invention: described step S1 is specially, adopt the real-time voltage that obtains arbitrary joint storage battery in series-connected batteries of logic judgement and the acquisition module of Executive Module; Whether described step S2 is specially, adopt magnitude of voltage that logic judgement and the master control module judges acquisition module of Executive Module collect in extremely; Described step S3 is specially, logic judgement is carried out non-dissipative equalizing charging with the acquisition module of Executive Module according to the judged result control relay network of main control module and DC/DC bidirectional constant module, and transition energy in balancing procedure is temporary in DC bus.
According to a preferred embodiment of the invention: the charging of non-dissipative equalizing in described step S3 adopts at one time the mode of the timesharing equilibrium of the joint storage battery in balanced series-connected batteries only.
According to a preferred embodiment of the invention: the charging of described non-dissipative equalizing comprises that the electric current that extracts high voltage state storage battery reduces the SOC value of this storage battery to reduce its magnitude of voltage, or the storage battery Celli of low-voltage is poured into electric current make its voltage rising.
According to a preferred embodiment of the invention: complete after charging at timesharing balanced way, described relay network disconnects charge circuit, if and logic judgement and Executive Module judge that ceiling voltage between single-unit storage battery and the pressure reduction of minimum voltage exceed preset value, control control relay network and DC/DC bidirectional constant module and proceed non-dissipative equalizing and charge.
According to a preferred embodiment of the invention: described non-dissipative equalizing charging comprises carries out buck or boost operation to a certain joint storage battery,
Wherein, the concrete grammar that a certain joint storage battery is carried out to reduced pressure operation is:
In the time that a certain joint storage battery is odd number, the detailed process of its non-dissipative equalizing charging comprises, first, and by acquisition module two the adjacent control switchs of this joint accumulator anode and cathode that close; Then, the first and second single-pole double-throw switch (SPDT)s are all got to upper terminal, disconnect remaining control switch simultaneously, and DC/DC bidirectional constant module is placed in to the pattern of filling with electric current to DC bus by acquisition module;
In the time that a certain joint storage battery is even number, the detailed process of its non-dissipative equalizing charging comprises, first, and by acquisition module two the adjacent control switchs of this joint accumulator anode and cathode that close; Then, the first and second single-pole double-throw switch (SPDT)s are all got to lower terminal, disconnect remaining control switch simultaneously, and DC/DC bidirectional constant module is placed in to the pattern of filling with electric current to DC bus by acquisition module;
The concrete grammar that a certain joint storage battery is carried out to boost operations is:
In the time that a certain joint storage battery is odd number, the detailed process of its non-dissipative equalizing charging comprises, first, and by acquisition module two the adjacent control switchs of this joint accumulator anode and cathode that close; Then, the first and second single-pole double-throw switch (SPDT)s are all got to upper terminal, disconnect remaining control switch simultaneously, and by acquisition module, DC/DC bidirectional constant module is placed in to the pattern of this joint electric power storage basin irrigation electric current;
In the time that a certain joint storage battery is even number, the detailed process of its non-dissipative equalizing charging comprises, first, and by acquisition module two the adjacent control switchs of this joint accumulator anode and cathode that close; Then, the first and second single-pole double-throw switch (SPDT)s are all got to lower terminal, disconnect remaining control switch simultaneously, and by acquisition module, DC/DC bidirectional constant module is placed in to the pattern of this joint electric power storage basin irrigation electric current.
Compared with prior art, beneficial effect of the present invention is: the present invention's DC/DC bidirectional constant module in the time of equilibrium can be got energy constant current output to a certain joint storage battery from DC bus, also can get energy from this storage battery constant current and get back to DC bus, and whole circuit topology adopts modular design philosophy, battery capacity is changeable, can carry out according to actual needs reasonable regulations, improve portfolio effect, increase the robustness of system.
Accompanying drawing explanation
Fig. 1. be the topology diagram of energy transfer type non-dissipative equalizing charging circuit of the present invention.
Fig. 2 is the flow chart of energy transfer type non-dissipative equalizing charging method of the present invention.
Fig. 3 is the workflow diagram of energy transfer type non-dissipative equalizing charging of the present invention.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the present invention is described in further detail, but embodiments of the present invention are not limited to this.
Consult shown in Fig. 1, the invention provides a kind of energy transfer type non-dissipative equalizing charging circuit, comprise logic judgement and Executive Module 301, relay network 302, series-connected batteries 303, DC/DC bidirectional constant module 304 and DC bus 305, relay network 302 is connected with series-connected batteries 303, logic judgement is connected with relay network 302 with Executive Module 301, and relay network 302 is also connected with DC bus 305 by DC/DC bidirectional constant module 304; The voltage that obtains arbitrary joint storage battery in series-connected batteries 303 that logic judgement and Executive Module 301 are real-time, judge that this magnitude of voltage is whether in extremely, and carry out non-dissipative equalizing charging according to this judged result control relay network 302 and DC/DC bidirectional constant module 304, and transition energy in balancing procedure is temporary in DC bus 305.
Relay network 302 comprises the control switch Kj on the both positive and negative polarity of the every joint storage battery Celli that is located at successively series-connected batteries 303, and first and second single-pole double-throw switch (SPDT), the control end of control switch Kj, the control end of the first and second single-pole double-throw switch (SPDT)s is all connected with acquisition module 32, and odd number control switch Kj is also connected with the upper terminal of the first single-pole double-throw switch (SPDT), even number control switch Kj is also connected with the upper terminal of the second single-pole double-throw switch (SPDT), the lower terminal of described the first single-pole double-throw switch (SPDT) is connected with the upper terminal of the second single-pole double-throw switch (SPDT), the lower terminal of described the second single-pole double-throw switch (SPDT) is connected with the upper terminal of the first single-pole double-throw switch (SPDT), the output of described the first single-pole double-throw switch (SPDT) and the second single-pole double-throw switch (SPDT) is all connected with DC/DC bidirectional constant module 304, wherein, i and i are positive integer.
In the present embodiment, select series-connected batteries 303 to comprise multiple storage battery Celli that both positive and negative polarity is connected successively, be cell1-cell6, they adopt the connected series system of both positive and negative polarity, at this moment individual seven of the quantity of control switch, be K1 to K7, and the first and second single-pole double-throw switch (SPDT)s adopt respectively K8 and K9 to represent.
In the present invention, logic judgement comprises interconnective main control module 31 and acquisition module 32 with Executive Module 301, and described acquisition module 32 is connected with the control input end of relay network 302 and DC/DC bidirectional constant module 304 respectively.
Concrete again, one row's control end of acquisition module 32 is connected with control switch K1-K7 and single-pole double-throw switch (SPDT) K8, k9 on series-connected batteries 303, its below two control ends are connected with DC/DC bidirectional constant module 304, the lower terminal of single-pole double-throw switch (SPDT) K8 is connected with the upper terminal of single-pole double-throw switch (SPDT) K9, the lower terminal of K9 is connected with the upper terminal of K8, the positive pole of cell1 is connected with control switch K1, negative pole is connected with control switch K2, by that analogy, the positive pole of storage battery cell6 is connected with control switch K6, and negative pole is connected with control switch K7.The control switch of odd number class, as another section of K1, K3, K5, K7 etc. is connected with the upper terminal of single-pole double-throw switch (SPDT) K8, the control switch of even number class, as another section of K2, K4, K6 etc. is connected with the upper terminal of single-pole double-throw switch (SPDT) K9, be connected to the control switch of series-connected batteries 303 as K1-K7, single-pole double-throw switch (SPDT) K8, k9, their control end is connected with acquisition module 32.And be connected to the control switch on series-connected batteries 303, as K1-K7, and single-pole double-throw switch (SPDT) K8, K9 all adopt relay to realize.31 the real-time series-connected batteries collecting according to acquisition module 32 303 voltage signal V of main control module make logic judgement, and acquisition module 32 had both been responsible for uploading real-time series-connected batteries 303 information, was responsible for carrying out again the break-make of relay network 302.
Described main control module 31 and acquisition module 32 all adopt the STM32 series microprocessor of ARM framework, described main control module 31 is STM32F107 microprocessor, described acquisition module 32 is STM32F103 microprocessor, because STM32 is the high performance-price ratio MCU based on ARM framework, its processing speed can reach megahertzes up to a hundred, can allow system meet higher requirement of real-time.
In the present invention, volume DC/DC bidirectional constant module 304 should be selected according to the concrete application of side circuit, can select the general module on market according to concrete application, also can be because of needs designed, designed, its power selection depends on the DC bus ceiling voltage of system, series-connected batteries 303 rated voltages in the present embodiment are 384V, ceiling voltage can reach 450V, and the balanced power supply of selecting for this example is the DC/DC bidirectional constant module that power 200W, 450V turn 4V.
What charging circuit of the present invention adopted is timesharing balance policy, by the corresponding switch of relay gate network 302, realize a certain joint storage battery buck or boost operation, for example to realize decompression operation to storage battery cell1, K1 and K2 first close a switch, single-pole double-throw switch (SPDT) K8, K9 are got to upper terminal, cut-off switch K3-K7, by acquisition module 32, DC/DC bidirectional constant module 304 is placed in to DC bus and fills with current-mode, storage battery cell1 will be discharged in DC bus as 50A with a constant electric current like this; If will realize boost operations to storage battery cell1, arrange constant in the situation that at control switch, by acquisition module 32, DC/DC bidirectional constant module 304 is placed in to electric power storage basin irrigation current-mode, DC/DC bidirectional constant module 304 is got energy from DC bus and is poured into as 50A with a constant electric current to storage battery cell1 like this.Also the same with storage battery cell1 to the operation of storage battery cell2, just will get to lower terminal by single-pole double-throw switch (SPDT) K8, K9.The equalization operation method of other storage battery similarly.The storage battery gating setting of odd number class is the same with storage battery cell1, and the storage battery gating setting of even number class is the same with storage battery cell2.
Because logic judgement comprises main control module 31 and 32 two modules of acquisition module with Executive Module 301.Acquisition module 32 is responsible for gathering the real time information of battery pack, comprises voltage V, electric current I, temperature T etc.And these real time information very first times are uploaded to main control module 31, series-connected batteries 303 real time information that main control module is uploaded according to acquisition module 32, pass through decision logic, issue operational order to acquisition module 32, and pass through certain joint storage battery in relay network 302 gating series-connected batteries 303 by the control end of acquisition module 32, send instructions down to DC/DC bidirectional constant module 304 simultaneously, determine its constant current direction, can rapidly the storage battery of selecting be realized and being boosted or step-down equilibrium, DC bus 305 serves as the temporary role of energy transition here, realize the non-dissipative equalizing thought described in system.Main control module 31 is wherein responsible for process information, and acquisition module 32 is responsible for transmission of information and is carried out corresponding operating, and such pipeline processes is conducive to realize modularization dilatation, can allow main control module hang multiple acquisition modules 32 for 31 times, improves the robustness of system.
Shown in Fig. 2, a kind of energy transfer type non-dissipative equalizing charging method provided by the invention, comprises the following steps,
The first step. the voltage that obtains arbitrary joint storage battery in series-connected batteries 303 that logic judgement and Executive Module 301 are real-time, namely adopts the real-time voltage that obtains arbitrary joint storage battery in series-connected batteries 303 of logic judgement and the acquisition module 32 of Executive Module 301;
Second step. whether logic judgement and Executive Module 301 judges that this magnitude of voltage is whether in extremely, namely adopt magnitude of voltage that the main control module 31 of logic judgement and Executive Module 301 judges that acquisition module 32 collects in extremely;
The 3rd step. logic judgement is carried out non-dissipative equalizing charging with Executive Module 301 according to output control relay network 302 and the DC/DC bidirectional constant module 304 of judgement, and the transition energy in balancing procedure is temporary in DC bus 305, namely logic judgement is carried out non-dissipative equalizing charging with the acquisition module 32 of Executive Module 301 according to the judged result control relay network 302 of main control module 31 and DC/DC bidirectional constant module 304.
It is above the introduced mode of the timesharing equilibrium of the joint storage battery in balanced series-connected batteries 303 only at one time that the charging of non-dissipative equalizing wherein adopts.And non-dissipative equalizing charging comprises that the electric current that extracts high voltage state storage battery reduces the SOC value of this storage battery Celli to reduce its magnitude of voltage, or the storage battery Celli of low-voltage is poured into electric current make its voltage rising.
Concrete, complete after charging at timesharing balanced way, relay network 302 disconnects charge circuit, if and logic judgement and Executive Module 301 judge that ceiling voltage between single-unit storage battery Celli and the pressure reduction of minimum voltage exceed preset value, control control relay network 302 and DC/DC bidirectional constant module 304 and proceed non-dissipative equalizing and charge.
Consult shown in Fig. 3 the specific works flow process figure for charging circuit provided by the present invention:
The first step: after system powers on, first open the charger on series-connected batteries 303, charge to series-connected batteries 303, now storage battery is in overall charged state.
Second step: gathered the voltage V1-Vn of n joint storage battery by acquisition module 32, exist side by side and be uploaded to main control module 31 by it, main control module is stored in the n of a reception voltage signal in Flash.
The 3rd step: main control module 31 call voltage comparison function by the voltage Vi collecting (i=1 ..., n) with reference voltage V I comparison.If existing at least one voltage Vi is greater than V I, illustrate that in battery pack, to have the voltage rising of a batteries at least too fast, and it exceedes normal range (NR), tackle its step-down processing of discharging.
The 4th step: now charger is normally worked, guarantee that all the other batteries charge normal, control module sends instructions for 31 times to acquisition module 32, acquisition module closes by control switch Kj and the K (j+1) at battery celli two ends by control end, if at this moment j is odd number, single-pole double-throw switch (SPDT) K8, K9 are incorporated into upper terminal; If j is even number, single-pole double-throw switch (SPDT) K8, K9 are incorporated into lower terminal, rest switch disconnects without exception.
The 5th step: acquisition control module sends instructions for 32 times to DC/DC bidirectional constant module 304, is placed in it and extracts battery current to DC bus mode.Like this storage battery celli just by constant-current discharge to DC bus, the at this moment voltage Vi of acquisition module 32 Real-time Collection storage battery celli, and be uploaded to main control module 31.Main control module calls voltage ratio compared with the size of V I and Vi, if Vi is greater than V I, illustrates that the voltage of storage battery celli is still too high compared with function ratio, it is continued to balanced discharge; If Vi is less than V I, illustrate that storage battery celli is in normal condition, should turn-off balanced loop, and get back to second step and repeat above flow process.
The 6th step: in above-mentioned the 3rd step, main control module by call voltage ratio compared with function ratio compared with V I and Vi (i=1 ... n) after size, if battery tension Vi (i=1 ... n) be all less than reference voltage V I, illustrate that batteries is in normal charging condition.
The 7th step: main control module 31 call voltage comparison function by the voltage Vi collecting (i=1 ..., n) with reference voltage V II comparison.If accumulator battery voltage Vi (i=1 ..., n) exist at least one to be not more than VII, illustrate that batteries is in normal pressure-increasning state, and do not approach full state, and continue to get back to second step, repeat above flow process.
If by voltage ratio compared with function comparative voltage Vi (i=1, n) with V II after, find all cell voltage Vi of batteries (i=1, n) be all greater than reference voltage V II, illustrate that this group storage battery has approached charging completion status, the SOC of all batteries in this group storage battery group has approached 1.
The 8th step: turn-off charger, stop overall charging, this step will be according to the further balancing battery of pressure reduction state, make battery pack reach best poised state, the real-time voltage V1-Vn that gathers and store is before carried out to size sequence, find voltage max Vk and voltage minimum Vp, main control module 31 calls voltage comparison function by the difference of voltage max Vk and voltage minimum Vp and with reference to pressure reduction Vth comparison.
If the difference of voltage max Vk and voltage minimum Vp than little with reference to pressure reduction Vth, can think in integral battery door group that each cell voltage is poor in balancing error allowed band, charge.
If the difference of voltage max Vk and voltage minimum Vp, than large with reference to pressure reduction Vth, illustrates that in battery pack, the pressure reduction between each battery is excessive, should reduce this difference by inner self-adjusting by equilibrium control.
The 9th step: acquisition module 32 passes through control relay network 302, the balanced loop of gating storage battery cellp, wherein, the storage battery control switch of odd number class and the state of single-pole double-throw switch (SPDT) are consistent with cell1; The storage battery control switch of even number class and the state of single-pole double-throw switch (SPDT) are consistent with cell2.
The tenth step: acquisition control module sends instructions for 32 times to DC/DC bidirectional constant module 304, allow it be placed in the mode of getting energy constant current and be input to storage battery from DC bus 305, and now other battery in battery pack is in discharge condition, their energy proceeds to DC bus and feeds back to battery cellp by DC/DC bidirectional constant module 304.
The 11 step: main control module 31 is opened inner timer, waiting timer timing finishes, and then turn-offs balanced loop, and continues to get back to second step, repeats above flow process.
Above-described embodiment is preferably execution mode of the present invention; but embodiments of the present invention are not restricted to the described embodiments; other any do not deviate from change, the modification done under Spirit Essence of the present invention and principle, substitutes, combination, simplify; all should be equivalent substitute mode, within being included in protection scope of the present invention.

Claims (10)

1. an energy transfer type non-dissipative equalizing charging circuit, it is characterized in that: comprise logic judgement and Executive Module (301), relay network (302), series-connected batteries (303), DC/DC bidirectional constant module (304) and DC bus (305), described relay network (302) is connected with series-connected batteries (303), described logic judgement is connected with relay network (302) with Executive Module (301), described relay network (302) is also connected with DC bus (305) by DC/DC bidirectional constant module (304),
The voltage that obtains arbitrary joint storage battery in series-connected batteries (303) that described logic judgement and Executive Module (301) are real-time, judge that this magnitude of voltage is whether in extremely, and carry out non-dissipative equalizing charging according to this judged result control relay network (302) and DC/DC bidirectional constant module (304), and transition energy in balancing procedure is temporary in DC bus (305).
2. energy transfer type non-dissipative equalizing charging circuit according to claim 1, it is characterized in that: described logic judgement comprises interconnective main control module (31) and acquisition module (32) with Executive Module (301), and described acquisition module (32) is connected with the control input end of relay network (302) and DC/DC bidirectional constant module (304) respectively.
3. energy transfer type non-dissipative equalizing charging circuit according to claim 2, is characterized in that: described series-connected batteries (303) comprises multiple storage batterys (Celli) that both positive and negative polarity is connected successively, described relay network (302) comprises the control switch (Kj) on the both positive and negative polarity of every joint storage battery (Celli) of being located at successively series-connected batteries (303), and first and second single-pole double-throw switch (SPDT), the control end of described control switch (Kj), the control end of the first and second single-pole double-throw switch (SPDT)s is all connected with acquisition module (32), and odd number control switch (Kj) is also connected with the upper terminal of the first single-pole double-throw switch (SPDT), even number control switch (Kj) is also connected with the upper terminal of the second single-pole double-throw switch (SPDT), the lower terminal of described the first single-pole double-throw switch (SPDT) is connected with the upper terminal of the second single-pole double-throw switch (SPDT), the lower terminal of described the second single-pole double-throw switch (SPDT) is connected with the upper terminal of the first single-pole double-throw switch (SPDT), the output of described the first single-pole double-throw switch (SPDT) and the second single-pole double-throw switch (SPDT) is all connected with DC/DC bidirectional constant module (304), wherein, i and j are positive integer.
4. energy transfer type non-dissipative equalizing charging circuit according to claim 2, it is characterized in that: described main control module (31) and acquisition module (32) all adopt the STM32 series microprocessor of ARM framework, described main control module (31) is STM32F107 microprocessor, and described acquisition module (32) is STM32F103 microprocessor.
5. an energy transfer type non-dissipative equalizing charging method, is characterized in that: the method comprises the following steps,
S1. the real-time voltage that obtains arbitrary joint storage battery in series-connected batteries (303) of logic judgement and Executive Module (301);
S2. logic judgement and Executive Module (301) judge that this magnitude of voltage is whether in extremely;
S3. logic judgement is carried out non-dissipative equalizing charging with Executive Module (301) according to output control relay network (302) and the DC/DC bidirectional constant module (304) of judgement, and transition energy in balancing procedure is temporary in DC bus (305).
6. energy transfer type non-dissipative equalizing charging method according to claim 5, it is characterized in that: described step S1 is specially, adopt the real-time voltage that obtains arbitrary joint storage battery in series-connected batteries (303) of logic judgement and the acquisition module (32) of Executive Module (301); Whether described step S2 is specially, adopt magnitude of voltage that logic judgement and the main control module (31) of Executive Module (301) judge that acquisition module (32) collects in extremely; Described step S3 is specially, logic judgement is carried out non-dissipative equalizing charging with the acquisition module (32) of Executive Module (301) according to the judged result control relay network (302) of main control module (31) and DC/DC bidirectional constant module (304), and transition energy in balancing procedure is temporary in DC bus (305).
7. energy transfer type non-dissipative equalizing charging method according to claim 5, is characterized in that: the charging of non-dissipative equalizing in described step S3 adopts at one time the mode of the timesharing equilibrium of the joint storage battery (Celli) in balanced series-connected batteries (303) only.
8. energy transfer type non-dissipative equalizing charging method according to claim 5, it is characterized in that: the charging of described non-dissipative equalizing comprises that the electric current that extracts high voltage state storage battery reduces the SOC value of this storage battery (Celli) to reduce its magnitude of voltage, or storage battery (Celli) to low-voltage pours into electric current and makes its voltage rising.
9. energy transfer type non-dissipative equalizing charging method according to claim 7, it is characterized in that: complete after charging at timesharing balanced way, described relay network (302) disconnects charge circuit, if and logic judgement and Executive Module (301) judge that ceiling voltage between single-unit storage battery (Celli) and the pressure reduction of minimum voltage exceed preset value, control control relay network (302) and DC/DC bidirectional constant module (304) and proceed non-dissipative equalizing and charge.
10. energy transfer type non-dissipative equalizing charging method according to claim 7, is characterized in that: described non-dissipative equalizing charging comprises carries out buck or boost operation to a certain joint storage battery,
Wherein, the concrete grammar that a certain joint storage battery is carried out to reduced pressure operation is:
In the time that a certain joint storage battery is odd number, the detailed process of its non-dissipative equalizing charging comprises, first, and by acquisition module (32) two the adjacent control switchs of this joint accumulator anode and cathode that close; Then, the first and second single-pole double-throw switch (SPDT)s are all got to upper terminal, disconnect remaining control switch simultaneously, and DC/DC bidirectional constant module (304) is placed in to the pattern of filling with electric current to DC bus (305) by acquisition module (32);
In the time that a certain joint storage battery is even number, the detailed process of its non-dissipative equalizing charging comprises, first, and by acquisition module (32) two the adjacent control switchs of this joint accumulator anode and cathode that close; Then, the first and second single-pole double-throw switch (SPDT)s are all got to lower terminal, disconnect remaining control switch simultaneously, and DC/DC bidirectional constant module (304) is placed in to the pattern of filling with electric current to DC bus (305) by acquisition module (32);
The concrete grammar that a certain joint storage battery is carried out to boost operations is:
In the time that a certain joint storage battery is odd number, the detailed process of its non-dissipative equalizing charging comprises, first, and by acquisition module (32) two the adjacent control switchs of this joint accumulator anode and cathode that close; Then, the first and second single-pole double-throw switch (SPDT)s are all got to upper terminal, disconnect remaining control switch simultaneously, and by acquisition module (32), DC/DC bidirectional constant module (304) is placed in to the pattern of this joint electric power storage basin irrigation electric current;
In the time that a certain joint storage battery is even number, the detailed process of its non-dissipative equalizing charging comprises, first, and by acquisition module (32) two the adjacent control switchs of this joint accumulator anode and cathode that close; Then, the first and second single-pole double-throw switch (SPDT)s are all got to lower terminal, disconnect remaining control switch simultaneously, and by acquisition module (32), DC/DC bidirectional constant module (304) is placed in to the pattern of this joint electric power storage basin irrigation electric current.
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CN104539017A (en) * 2014-12-31 2015-04-22 深圳先进技术研究院 Power battery pack balancing system and method
CN109217400A (en) * 2017-07-05 2019-01-15 周锡卫 A kind of unidirectional active equalization battery management system of two-way and control method based on multiple-unit sorting
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