[go: up one dir, main page]
More Web Proxy on the site http://driver.im/

CN113922455A - Energy transfer type battery monomer voltage management circuit - Google Patents

Energy transfer type battery monomer voltage management circuit Download PDF

Info

Publication number
CN113922455A
CN113922455A CN202111204763.4A CN202111204763A CN113922455A CN 113922455 A CN113922455 A CN 113922455A CN 202111204763 A CN202111204763 A CN 202111204763A CN 113922455 A CN113922455 A CN 113922455A
Authority
CN
China
Prior art keywords
battery
management circuit
transformer
series
voltage management
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN202111204763.4A
Other languages
Chinese (zh)
Other versions
CN113922455B (en
Inventor
尚德华
张伟
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Aopu Shanghai New Energy Co Ltd
Original Assignee
Aopu Shanghai New Energy Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Aopu Shanghai New Energy Co Ltd filed Critical Aopu Shanghai New Energy Co Ltd
Priority to CN202111204763.4A priority Critical patent/CN113922455B/en
Publication of CN113922455A publication Critical patent/CN113922455A/en
Application granted granted Critical
Publication of CN113922455B publication Critical patent/CN113922455B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
    • H02J7/0014—Circuits for equalisation of charge between batteries
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
    • H02J7/0014—Circuits for equalisation of charge between batteries
    • H02J7/0019—Circuits for equalisation of charge between batteries using switched or multiplexed charge circuits
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
    • H02J7/345—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering using capacitors as storage or buffering devices
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
    • H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
    • H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
    • Y—GENERAL 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

The invention relates to an energy transfer type battery monomer voltage management circuit, which is used for managing a battery pack comprising a plurality of battery monomers connected in series, wherein the battery pack is divided into a plurality of battery units, each battery unit comprises a plurality of battery rows connected in series, each battery row comprises a plurality of battery monomers, the management circuit comprises a transformer, a plurality of inductors, a plurality of energy storage capacitors and a plurality of switching tubes, the transformer is provided with a plurality of primary windings, two ends of a secondary winding of the transformer are respectively connected with the positive electrode and the negative electrode of the battery pack through the switching tubes, and the plurality of primary windings are respectively connected with two ends of the plurality of battery units in parallel through different switching tubes; two ends of each battery row are connected with an inductor in parallel through a switching tube, and an energy storage capacitor is connected in series between adjacent inductors connected with the battery rows in parallel in each battery unit. The energy transfer type battery monomer voltage management circuit improves the inconsistency of the battery pack and prolongs the service life of the battery.

Description

Energy transfer type battery monomer voltage management circuit
Technical Field
The invention relates to the technical field of battery management, in particular to an energy transfer type battery monomer voltage management circuit.
Background
The service life of the battery pack is seriously affected by the inconsistency of the batteries, and the battery pack is obviously inferior to the performance of a monomer in the aspects of cycle life, capacity utilization rate and the like according to the wooden barrel effect. Along with the recycling of the battery pack, the inconsistency of the monomers is aggravated, the grouping characteristic of the lithium ion battery is further worsened, and the overcharge and overdischarge conditions of a few monomers are easy to occur, so that the performance of the battery pack is greatly attenuated, even serious accidents such as combustion and explosion can occur under extreme conditions, and great obstruction is caused to the application and popularization of the lithium ion battery.
Carry out equalization control to the group battery, in the recycling process promptly, in order to energy consumption or the mode of shifting to in the group battery monomer energy in good time carry out the balance to reduce the monomer and take place the probability of overcharging and overdischarging, eliminate the adverse effect of depth of discharge difference to the group battery, and then improve the whole energy utilization of group battery, prolong battery cycle life.
Disclosure of Invention
In view of the above, it is desirable to provide an energy transfer type cell voltage management circuit capable of improving the inconsistency of the battery and prolonging the service life of the battery.
An energy transfer type battery cell voltage management circuit for managing a battery pack including a plurality of battery cells connected in series, the battery pack being divided into a plurality of battery cells, each battery cell including a plurality of battery banks connected in series, the battery banks including a plurality of battery cells,
the management circuit comprises a transformer, a plurality of inductors, a plurality of energy storage capacitors and a plurality of switching tubes, wherein the transformer is provided with a plurality of primary windings, two ends of a secondary winding of the transformer are respectively connected with the positive electrode and the negative electrode of the battery pack through the switching tubes, and the primary windings are respectively connected with two ends of the battery units in parallel through different switching tubes;
two ends of each battery row are connected with an inductor in parallel through a switching tube, and an energy storage capacitor is connected in series between adjacent inductors connected with the battery rows in parallel in each battery unit.
Furthermore, the management circuit further comprises a plurality of equalizing capacitors and a plurality of control switches, and the adjacent single batteries of the battery row are respectively connected with one equalizing capacitor in parallel through two control switches.
Furthermore, the management circuit further comprises a plurality of filter capacitors, and two ends of each battery monomer in the battery bank are connected with one filter capacitor in parallel.
Further, the number of battery rows in the plurality of battery units is equal, and the number of battery cells in the plurality of battery rows is equal.
Further, the battery unit has two battery rows therein.
Furthermore, an energy storage capacitor is connected in series between the adjacent inductors, and the energy storage capacitor and the adjacent inductors form a CUK converter.
Further, the battery row has two battery cells.
According to the energy transfer type battery cell voltage management circuit, rapid balancing of any cell in a battery pack can be achieved through transformer balancing, the control mode is simple, balancing current is large, balancing efficiency is high, the structure is easy to expand, the number of primary windings of a transformer is greatly reduced, and the difficulty in consistency control of the primary windings of the transformer is greatly reduced. When the balancing circuit of the CUK converters performs battery balancing, the balancing discharge and the charging are performed simultaneously, the balancing speed is high, the balancing energy transfer efficiency is high, the inductance in each CUK converter balances the voltage of the battery row formed by connecting a plurality of single batteries in series, so that the pressure difference is increased, and the defect that the balancing current is small when the voltage difference of each single battery in the battery pack is small is overcome. The switched capacitor method is used for managing active balance of two adjacent battery monomers, and mainly has the functions of judging the charge state difference between the two adjacent batteries, and transferring redundant electric quantity of a battery with high voltage to a battery with low voltage through a transfer station of a capacitor in a mode of switching a power supply by a balance module according to a balance algorithm result so as to realize the maximization of the battery capacity. The scheme only needs the switch and the capacitor to complete the construction of the equalizing circuit, and has the advantages of simple structure and almost no energy loss in the equalizing process. Through the combination of the equalization methods, the inconsistency of the battery pack battery is improved, and the service life of the battery is prolonged.
Drawings
Fig. 1 is a circuit diagram of an energy-transferring cell voltage management circuit according to an embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in FIG. 1, an energy transfer type battery cell voltage management circuit is used for managing a battery cell B comprising a plurality of battery cells connected in series1～BnThe battery pack is divided into a plurality of battery units 110, each battery unit 110 comprises a plurality of battery rows 112 connected in series, and each battery row 112 comprises a plurality of battery cells. The management circuit comprises a transformer T and a plurality of inductors L1～Ln/2A plurality of energy storage capacitors CL1～CLn/4And a plurality of switching tubes S1-1～S1-n/2、S、SN1～SNn/4The transformer T has a plurality of primary windings N1-1～N1-n/4Secondary winding N of transformer T2The two ends of the primary winding are respectively connected with the positive electrode and the negative electrode of the battery pack through a switch tube S, and a plurality of primary windings N1-1～N1-n/4Respectively passing through different switch tubes SN1～SNn/4And are connected to both ends of the plurality of battery cells 110. Two ends of each battery row 112 pass through a switch tube S1-1～S1-n/2An inductor is connected in parallel, and an energy storage capacitor C is connected in series between adjacent inductors connected in parallel with the battery row 112 in each battery unit 110L1～CLn/4。
In this embodiment, the management circuit further includes a plurality of equalizing capacitors CB1～CBn/2And a plurality of control switches S1～SnAdjacent battery cell B of the battery row 1121～BnRespectively through two control switches S1～SnConnected in parallel with an equalizing capacitor CB1～CBn/2。
In this embodiment, the management circuit further includes a plurality of filter capacitors C1～CnTwo ends of each single battery in the battery row 112 are connected in parallel with a filter capacitor C1～Cn. Specifically, the number of battery rows 112 in the plurality of battery units 110 is equal, and the number of battery cells in the plurality of battery rows 112 is equal. The battery unit 110 has two battery rows 112 therein. Adjacent inductance L1～Ln/2An energy storage capacitor C is connected in series betweenL1～CLn/4And adjacent inductance L1～Ln/2Forming the CUK converter. The battery row 112 has two battery cells B1～Bn。
This is explained in detail below with reference to fig. 1.
Taking an example of a serial module of n single batteries, according to the scheme of the present invention, every 4 single batteries constitute 1 battery unit 110, which is divided into n/4 units, every 2 single batteries constitute 1 battery row 112, and each battery unit 110 consists of 2 battery rows 112. For example battery cell B1～B4The 1 st battery unit and the battery monomer B are formed in seriesn-3～BnAre connected in series to form the (n/4) th battery unit. The 4 battery cells in each battery unit are divided into 2 small cells (battery rows), each battery row is composed of 2 battery cells, and the adjacent 2 battery rows share 1 CUK (Care Unite Skin, Cuk chopper circuit) converter equalization circuit. 2 battery monomers in each battery row share 1 capacitor as a balance capacitor; the battery unit composed of 4 battery cells composed of every 2 battery rows is balanced with the whole battery pack by arranging 1 transformer.
Wherein the switch tube S1-1～S1-n/2、S、SN1～SNn/4And a control switch S1～SnIs a power switch tube. A filter capacitor C connected with each battery cell in parallel1～CnThe high-frequency filter capacitor is used for filtering noise waves in the energy transmission process. N is a radical of1-1～N1-n/4Primary winding for T-balancing of transformer, N2And a secondary winding for equalizing the transformer. L is1～Ln/2And CL1～CLn/4Respectively an inductor and a capacitor of the equalizing circuit of the CUK converter. CB1～CBn/2For equalising capacitanceEqualizing the capacitance.
The balancing principle of the circuit of the invention is that firstly, the transformer is used for completing the balancing between each battery unit 110 and the whole battery pack, then the CUK converter is used for completing the balancing between the adjacent 2 battery rows, and finally the balancing capacitor is used for completing the balancing between the 2 battery monomers in each battery row.
The specific equalizing process of the present invention will now be described in detail with respect to the 1 st battery cell 110 formed by the first 4 battery cells B1-B4 connected in series in the battery pack, and the equalizing steps are as follows:
in the first step, the balance between the 1 st battery unit 110 and the whole battery pack is accomplished by using the transformer T. The specific equalization process is divided into the following 2 cases to be respectively completed:
in the first case, assuming that the voltage of the 1 st cell is higher than that of the other cells in the battery pack, the equalization step is as follows:
step 1, power switch tube SN1Conducting and switching on the 1 st battery unit and the primary winding N balanced by the transformer connected in series with the battery unit1-1Part of the electric quantity of the battery unit is stored in the primary winding N1-1In (1). The current direction is as in1。
Step 2, power switch tube SN1The power switch tube S is switched off, and the whole battery pack and a secondary winding N balanced by a transformer connected with the battery pack in series are switched on2The previous step is stored in the primary winding N1-1Is coupled to the secondary winding N2Middle and secondary winding N2The electric power in the battery pack flows to the whole battery pack. The current direction is as in2。
In the second case, assuming that the voltage of the 1 st cell is lower than that of the other cells in the battery pack, the equalization step is as follows:
step 1, a power switch tube S is conducted to connect the whole battery module and a secondary winding N balanced by a transformer connected with the battery module in series2Partial electric quantity of the whole battery module is stored in the secondary winding N2In (1). The current direction is shown as i3。
Step 2, the power switch tube S is turned off, and the power switch tube SN1Conduction ofPrimary winding N equalized by connecting 1 st battery unit and transformer connected in series with it1-1The last step is stored in the secondary winding N2Is coupled to the primary winding N1-1Middle primary winding N1-1The amount of electricity in (1) is transferred to the 1 st battery cell. The current direction is shown as i4。
And step two, completing the balance between the 1 st battery unit and the battery pack through a plurality of cycles of the first step, closing the transformer for balance, and starting the CUK converter for balance to complete the balance among 2 battery rows in the battery unit.
Now assume 2 cells B in the 1 st battery row1～B 22 battery cells B compared with the 2 nd small battery unit3～B4The cell voltage is higher, and the equalization steps are as follows: see fig. 1.
Step 1, power switch tube S1-1MOS transistor Q in1-1And conducting to close the input and output loop. Power switch tube S1-2In the body diode D1-2And cutting off in the reverse direction. At this time, 2 battery cells B in the 1 st battery row1～B2The current I flowing out1Make the inductance L1Storing energy; energy storage capacitor CL1Discharge current I2Make the inductance L2Storing energy and supplying to 2 single batteries B of the 2 nd battery row3～B4The battery is charged to transfer the amount of electricity. The discharging of the 1 st battery row and the charging of the 2 nd battery row are carried out simultaneously, and energy flows in two directions.
Step 2, power switch tube S1-1MOS transistor Q in1-1Cut-off, power switch tube S1-2In the body diode D1-2The current is conducted by positive bias, and an input-output loop is closed. At this time, 2 battery cells B in the 1 st battery row1～B2And an inductance L1-1Induced electromotive force is added to the energy storage capacitor CL1Charging, charging current I3Energy storage capacitor CL1Energy storage, inductance L2Discharge energy, discharge current I thereof4To 2 battery cells B of the 2 nd battery row3～B4The battery is charged to transfer the amount of electricity. Discharge of 1 st battery row and 2 nd electricityThe charging of the cell rows is carried out simultaneously, and the energy flows in two directions.
From the above steps 1 and 2, it can be seen that the power switch tube S is used in any power switch tube1-1MOS transistor Q1-1During the on or off period, the 1 st battery row can transfer energy to the 2 nd battery row, and the energy storage capacitor CL1In the circuit is an energy storage element. In the power switch tube S1-1MOS transistor Q1-1During the off period of (1), the current I of the 1 st cell row3So that the energy storage capacitor CL1Charging to store energy; in the power switch tube S1-1MOS transistor Q1-1During the on-period of (C), the energy storage capacitorL1Discharging releases energy to the 2 nd battery bank.
If 2 battery cells B in the 1 st battery row1～B2Compared with 2 battery monomers B in the 2 nd battery row3～B4The cell voltage is lower and the equalization steps are similar to steps 1 and 2 above.
And thirdly, completing the balance between the 1 st battery row and the 2 nd small battery row through a plurality of cycles of the second step, closing the CUK converter for balance, and starting the balance capacitor in each battery row to complete the balance between the 2 battery monomers in the battery row.
The equalization of the 1 st cell row will now be described as an example. The specific equalization process is as follows:
cell B in the 1 st battery row1～B2One of the cells must have a relatively high voltage, assuming cell B1Comparative battery monomer B2The voltage is higher. Make power switch tube S1Conducting and connecting the battery cell B1And an equalizing capacitor CB1Part of the electric quantity of the battery unit is stored in the equalizing capacitor CB1In (1). The current direction is shown as i5。
Step 2, power switch tube S1Closed, power switch tube S2The MOS tube in the battery is closed, the body diode is conducted, and the battery monomer B is switched on2Equalizing capacitor C connected in series with itB1Equalizing capacitance CB1The electric quantity stored in the last step is transferred to a battery monomer B2In (1). Current squareTo the formula i in the figure6。
And (4) completing the balance among 2 single batteries in the 1 st battery row through a plurality of cycles of the third step, finally closing the active balance of the capacitor, and finishing the balance of the whole series battery pack.
The general equalization strategy is that firstly, the transformer is used for equalizing and completing the active equalization of electric quantity transfer between each battery unit and the whole battery pack, then the CUK converter is used for equalizing and completing the active equalization of electric quantity transfer between 2 adjacent battery rows, and finally the equalization capacitor is used for completing the active equalization of electric quantity transfer between 2 battery monomers in each battery row.
The transformer balancing scheme can simultaneously realize the balancing of a plurality of battery monomers, so that the terminal voltages of all the battery monomers are close to the average voltage level finally. The topology has the advantages of simple operation and easy control, but when the number of the battery cells is large, the design of the multi-winding transformer is difficult, the consistency of the windings on the primary side is difficult to ensure, and the topology has the defect of difficult expansion. The whole battery pack is divided into a plurality of battery units, the battery units are connected with the primary windings of the transformers in units, after grouping transformer equalization is carried out, the number of the primary windings of the transformers is greatly reduced, for example, each battery unit is provided with four battery cells, the number of the primary windings of the transformers is 1/4 of the original number, and therefore the consistency control difficulty of the primary windings of the transformers is greatly reduced.
When the balancing circuit of the CUK converter is used for balancing the batteries, the balancing discharge and the charging are carried out simultaneously, the balancing speed is high, the balancing energy transfer efficiency is high, but usually only 2 adjacent battery monomers can be balanced, and the balancing principle is that the energy transfer balance is carried out by utilizing the voltage difference between the battery monomers, so that when the voltage difference of the battery monomers is small, the balancing current is small, and the balancing efficiency is very low. After the series single batteries are grouped, the inductance in each CUK converter is balanced by the voltage of the battery row formed by connecting the plurality of single batteries in series, and taking the example that each battery row is provided with two single batteries, the voltage balanced by the inductance is 2 times of the voltage of each single battery, namely the voltage difference between the single batteries is amplified by 2 times, so that the voltage difference is increased, and the defect that the balanced current is small when the voltage difference of each single battery in the battery pack is small is overcome.
According to the energy transfer type battery cell voltage management circuit, rapid balancing of any cell in a battery pack can be achieved through transformer balancing, the control mode is simple, balancing current is large, balancing efficiency is high, the structure is easy to expand, the number of primary windings of a transformer is greatly reduced, and the difficulty in consistency control of the primary windings of the transformer is greatly reduced. When the balancing circuit of the CUK converters performs battery balancing, the balancing discharge and the charging are performed simultaneously, the balancing speed is high, the balancing energy transfer efficiency is high, the inductance in each CUK converter balances the voltage of the battery row formed by connecting a plurality of single batteries in series, so that the pressure difference is increased, and the defect that the balancing current is small when the voltage difference of each single battery in the battery pack is small is overcome. The switched capacitor method is used for managing active balance of two adjacent battery monomers, and mainly has the functions of judging the charge state difference between the two adjacent batteries, and transferring redundant electric quantity of a battery with high voltage to a battery with low voltage through a transfer station of a capacitor in a mode of switching a power supply by a balance module according to a balance algorithm result so as to realize the maximization of the battery capacity. The scheme only needs the switch and the capacitor to complete the construction of the equalizing circuit, and has the advantages of simple structure and almost no energy loss in the equalizing process. Through the combination of the equalization methods, the inconsistency of the battery pack battery is improved, and the service life of the battery is prolonged.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (7)

1. An energy transfer type battery cell voltage management circuit for managing a battery pack including a plurality of battery cells connected in series, the battery pack being divided into a plurality of battery cells, each battery cell including a plurality of battery banks connected in series, the battery banks including a plurality of battery cells,
the management circuit comprises a transformer, a plurality of inductors, a plurality of energy storage capacitors and a plurality of switching tubes, wherein the transformer is provided with a plurality of primary windings, two ends of a secondary winding of the transformer are respectively connected with the positive electrode and the negative electrode of the battery pack through the switching tubes, and the primary windings are respectively connected with two ends of the battery units in parallel through different switching tubes;
two ends of each battery row are connected with an inductor in parallel through a switching tube, and an energy storage capacitor is connected in series between adjacent inductors connected with the battery rows in parallel in each battery unit.
2. The transferred battery cell voltage management circuit of claim 1, further comprising a plurality of balancing capacitors and a plurality of control switches, wherein adjacent battery cells of the battery row are respectively connected in parallel to one balancing capacitor through two control switches.
3. The transferred cell voltage management circuit of claim 1, further comprising a plurality of filter capacitors, one filter capacitor connected across each cell in the bank.
4. The transferred cell voltage management circuit of any of claims 1-3, wherein the number of battery rows in the plurality of battery cells is equal and the number of cells in the plurality of battery rows is equal.
5. The transferred cell voltage management circuit of claim 4, wherein there are two battery rows in the battery unit.
6. The transferred cell voltage management circuit of claim 5, wherein an energy storage capacitor is connected in series between adjacent inductors to form a CUK converter with the adjacent inductors.
7. The transferred cell voltage management circuit of claim 5, wherein there are two cells in the battery bank.
CN202111204763.4A 2021-10-15 2021-10-15 Energy transfer type battery cell voltage management circuit Active CN113922455B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202111204763.4A CN113922455B (en) 2021-10-15 2021-10-15 Energy transfer type battery cell voltage management circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202111204763.4A CN113922455B (en) 2021-10-15 2021-10-15 Energy transfer type battery cell voltage management circuit

Publications (2)

Publication Number Publication Date
CN113922455A true CN113922455A (en) 2022-01-11
CN113922455B CN113922455B (en) 2023-10-13

Family

ID=79240658

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202111204763.4A Active CN113922455B (en) 2021-10-15 2021-10-15 Energy transfer type battery cell voltage management circuit

Country Status (1)

Country Link
CN (1) CN113922455B (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101764421A (en) * 2010-01-15 2010-06-30 中国科学院电工研究所 Equalizing equipment for battery units of electric automobile
JP2012138979A (en) * 2010-12-24 2012-07-19 Nippon Soken Inc Output equalization system of battery pack
CN104485703A (en) * 2014-12-04 2015-04-01 中国科学院广州能源研究所 Voltage balancing method and voltage balancing circuit of lithium-ion energy storage battery
CN106532829A (en) * 2016-11-29 2017-03-22 河南科技大学 Two-stage balance control circuit, system and policy for charge and discharge of lithium battery packs
CN107195994A (en) * 2017-07-07 2017-09-22 东莞中汽宏远汽车有限公司 Active equalization device for battery pack
CN109720234A (en) * 2018-12-04 2019-05-07 深圳众力新能源科技有限公司 A kind of two-way active equalization device and its system of vehicle mounted dynamic battery group

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101764421A (en) * 2010-01-15 2010-06-30 中国科学院电工研究所 Equalizing equipment for battery units of electric automobile
JP2012138979A (en) * 2010-12-24 2012-07-19 Nippon Soken Inc Output equalization system of battery pack
CN104485703A (en) * 2014-12-04 2015-04-01 中国科学院广州能源研究所 Voltage balancing method and voltage balancing circuit of lithium-ion energy storage battery
CN106532829A (en) * 2016-11-29 2017-03-22 河南科技大学 Two-stage balance control circuit, system and policy for charge and discharge of lithium battery packs
CN107195994A (en) * 2017-07-07 2017-09-22 东莞中汽宏远汽车有限公司 Active equalization device for battery pack
CN109720234A (en) * 2018-12-04 2019-05-07 深圳众力新能源科技有限公司 A kind of two-way active equalization device and its system of vehicle mounted dynamic battery group

Also Published As

Publication number Publication date
CN113922455B (en) 2023-10-13

Similar Documents

Publication Publication Date Title
CN109950949B (en) Three-level active equalization circuit of lithium battery pack for energy storage
CN106356927A (en) Lithium battery pack SOC (state of charge) equalization system and lithium battery pack SOC equalization method
CN101740827A (en) Active equalization system of lithium-ion power battery and equalization method thereof
CN113872288B (en) Voltage balancing circuit and method for battery cells in battery module
CN110707783B (en) Compound level battery equalizer circuit based on LLC and Buck-Boost
CN108039759B (en) Multi-mode high-efficiency energy equalizer of lithium ion battery system and control method thereof
CN107134599B (en) Voltage equalization circuit of series battery pack and working method thereof
CN107294174A (en) Equalizing circuit structure and method between a kind of battery cell and battery pack
CN111490572B (en) Equalizing device and method adopting voltage-multiplying switch energy storage element and battery management system
CN113725973A (en) Battery equalization circuit for capacitor and passive resistor of active transformer
CN110867921B (en) Direct equalization method for series battery pack based on converter
CN110707780B (en) Staggered battery equalization circuit structure based on transformer
CN113659679A (en) Battery equalization circuit
CN113629807A (en) Transformer inductance resistance battery equalization circuit
CN110729781B (en) Lithium battery pack equalization control method taking charge quantity difference value as equalization criterion
CN112769182A (en) Efficient and rapid active equalization circuit for echelon battery
CN113922455B (en) Energy transfer type battery cell voltage management circuit
CN215042227U (en) Series battery pack equalization circuit based on L-LC energy storage
CN114156981B (en) Battery module balance control circuit and method based on transformer
CN113489097A (en) Active equalization method for series battery pack based on L-LC energy storage
CN221177325U (en) Active equalization circuit of energy storage lithium ion battery
CN113725975B (en) Double-layer capacitance resistance battery equalization circuit
Choi et al. Active cell equalizer based on coupled-inductor cuk converter for improved cell balancing speed
CN114336863B (en) Capacitive inductance solving circuit of battery module short-plate battery monomer
CN116961177B (en) Method for utilizing maximum available capacity of battery pack based on dispatching field algorithm

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant