CN204947676U - A kind of battery pack layering equalizing circuit - Google Patents
A kind of battery pack layering equalizing circuit Download PDFInfo
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- CN204947676U CN204947676U CN201520714724.2U CN201520714724U CN204947676U CN 204947676 U CN204947676 U CN 204947676U CN 201520714724 U CN201520714724 U CN 201520714724U CN 204947676 U CN204947676 U CN 204947676U
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Abstract
The utility model discloses a kind of battery pack layering equalizing circuit, comprise battery pack, three bottom cell module control circuits and battery pack main control circuit, battery pack comprises three bottom cell modules, the corresponding switching tube of each bottom cell module; A bottom cell module and the control of a bottom cell module.This battery pack layering equalizing circuit is shared out the work and helped one another mutually by bottom cell module control circuit and battery pack main control circuit, the electricity dynamic equalization of all cells in battery set charge/discharge process can be realized, break away from the short-board effect of battery pack, improve the active volume of battery pack, extend the service life cycle of battery pack, reduce maintenance and the replacement cycle of battery pack, reduce the operation and maintenance cost of system.Therefore this battery pack layering equalizing circuit goes in hybrid vehicle, mini electric vehicle or energy storage equipment.
Description
Technical field
The utility model relates to a kind of battery pack layering equalizing circuit, is applicable in hybrid vehicle, mini electric vehicle or energy storage equipment.
Background technology
Along with energy-conserving and environment-protective concept comes into one's own and the development of lithium ion battery technology, electric automobile becomes the focus of international competition gradually, the core of electric automobile or energy storage equipment is battery, but when Li-ion batteries piles series connection uses, the unbalanced problem of capacity strongly limit its extensive use.Therefore the appearance of battery equalizing circuit just seems particularly important, especially for expensive high capacity lithium ion battery group, more needs equalizing circuit and balance policy effectively reliably.Circuit of battery pack balancing is exactly mainly the capacity utilization in order to improve battery pack, prevents battery from occurring overcharging and overdischarge, extends the service life cycle of battery.So the core of battery pack is battery equalizing circuit again.The battery equalizing circuit of a superior performance can ensure that battery pack is run all the time safely and reliably, give full play to battery performance, break away from during battery pack uses the short-board effect occurred, improve the service life cycle of battery pack, by a series of effective management and control, ensure the normal work of electric automobile or energy storage equipment.
At present, two kinds being mainly contained to the method for series battery balance charge/discharge both at home and abroad: a kind of is chemical method, namely making internal storage battery generation chemical reaction to reach balance charge/discharge effect by adding certain special chemical composition.Another kind is the method for physics, namely adopts machinery or electronically to reach the effect of balance charge/discharge.
Because chemical equalization is still in the research primary stage at present, so balance charge/discharge mainly adopts is physical method.Adopt physical method to carry out balance charge/discharge to Li-ion batteries piles, charge balancing, equalization discharge and dynamic equalization can be divided into.When charge balancing refers to that batteries monomer voltage reaches set point, equalizing circuit is utilized to reduce its charging current thus prevent overcharge.Equalization discharge refers in discharge process, prevents overdischarge by the cell makeup energy low to voltage.Dynamic equalization mode then combines both advantage, carries out electric quantity balancing, avoid the problem in single equilibrium in whole charge and discharge process to battery pack.
Utility model content
The purpose of this utility model adopts battery pack layering equalizing circuit, dynamic bidirectional non-dissipative equalizing between the battery pack that realization is made up of 3 bottom cell block coupled in series, optimization battery pack usefulness, prevents the phenomenons such as the overcharge of cell, overdischarge, overtemperature or overcurrent.
Battery pack main control circuit exports control signal, distribute the order of the operating time between bottom cell module control circuit and switching tube, make the dynamic bidirectional non-dissipative equalizing realized between each bottom cell module and between each cell in bottom cell module in charge and discharge process.In charging process, when any one battery cell in series battery or bottom cell module electricity too high time, then the electricity of this battery cell or bottom cell module can be passed to other all residual monomer of battery pack by equalizing circuit; In discharge process, when any one battery cell in series battery or bottom cell module electricity too low time, the electricity of other all residual monomer of battery pack can be passed to the too low battery cell of this electricity or bottom cell module by equalizing circuit.
To achieve these goals, the utility model is achieved by following technical proposals.
A kind of battery pack layering equalizing circuit, comprise battery pack, three bottom cell module control circuits and battery pack main control circuit, battery pack comprises three bottom cell modules, the corresponding switching tube of each bottom cell module; A bottom cell module is connected with a bottom cell module control circuit, three bottom cell block coupled in series connect, three corresponding switching tubes also connect in turn, common point between adjacent bottom cell module is connected by energy storage inductor with the common point between adjacent switch pipe, control signal is exported by battery pack main control circuit, control the work of bottom cell module control circuit and switching tube, make the dynamic bidirectional non-dissipative equalizing realized between each bottom cell module and between each cell in bottom cell module in charge and discharge process.
Further, three bottom cell modules are made up of the first bottom cell module, the second bottom cell module and the 3rd bottom cell block coupled in series, and the positive pole of the first bottom cell module connects power supply, the minus earth of the 3rd bottom cell module; Each bottom cell module is controlled by the bottom cell module control circuit of correspondence; Each switching tube forms on the source electrode of MOSFET and drain electrode by diodes in parallel; The source electrode of the MOSFET of the first switching tube is connected with power supply, the drain electrode of the MOSFET of the first switching tube is connected with the source electrode of the MOSFET of second switch pipe, the drain electrode of the MOSFET of second switch pipe is connected with the source electrode of the MOSFET of the 3rd switching tube, the grounded drain of the MOSFET of the 3rd switching tube.
Further, described battery pack is made up of lead-acid battery, lithium ion battery, ultracapacitor or nickel-cadmium cell.
Further, each bottom cell module is made up of four cells and balanced subelement; Four cells are connected in series, and all balanced with one subelement of each cell is connected; Each balanced subelement is with the MOSFET of fly-wheel diodes and balanced subelement energy storage inductor to form by two, the MOSFET of two band fly-wheel diodes is for drawing together upper brachium pontis MOSFET and lower brachium pontis MOSFET, and the source electrode of upper brachium pontis MOSFET is all connected with one end of energy storage inductor with the drain electrode of lower brachium pontis MOSFET; The drain electrode of upper brachium pontis MOSFET is as the first output, the grid of upper brachium pontis MOSFET is as the second output, the grid of lower brachium pontis MOSFET is as the 3rd output, and the source electrode of lower brachium pontis MOSFET is as the 4th output, and the energy storage inductor other end is as the 5th output; 5th output of the subelement balanced with of the connection common point between neighboring unit cell connects, and the intermediate point after four cell series connection connects the 5th output of two balanced subelements; In balanced subelement, the break-make of MOSFET is controlled by bottom cell module control circuit.
Further, described battery pack main control circuit or bottom cell module control circuit control to meet: in each switch periods, the drive singal that control circuit applies can make energy storage inductor realize resetting, and namely the electric current of energy storage inductor increases by zero, reduces to zero again subsequently.
Further, in charging process, if the voltage of the first bottom cell module is higher than other two bottom cell modules, in order to prevent overcharge, in a switch periods, first make the first switching tube conducting, now electric current flows through the first bottom cell module, the first switching tube and the first energy storage inductor, and inductance starts energy storage; Make it turn off after first switching tube conducting certain hour, now electric current releases energy to the second bottom cell module and the 3rd bottom cell module by the fly-wheel diode of second switch pipe and the 3rd switching tube; If the voltage of the second bottom cell module is higher than other two bottom cell modules, in order to prevent overcharge, in a switch periods, first make the conducting of second switch pipe, now electric current flows through the second bottom cell module, second switch pipe, the first energy storage inductor and the second energy storage inductor, and the first energy storage inductor and the second energy storage inductor start energy storage; Make it turn off after second switch pipe conducting certain hour, now electric current releases energy to the first bottom cell module and the 3rd bottom cell module respectively by the fly-wheel diode of the first switching tube and the 3rd switching tube; If the voltage of the 3rd bottom cell module is higher than other two bottom cell modules, in order to prevent overcharge, in a switch periods, first make the 3rd switching tube conducting, now electric current flows through the 3rd bottom cell module, the 3rd switching tube and energy storage inductor, and inductance starts energy storage; Make it turn off after 3rd switching tube conducting certain hour, now electric current releases energy to the first bottom cell module and the first bottom cell module by the fly-wheel diode of the first switching tube and second switch pipe;
In discharge process, if the voltage of the first bottom cell module is lower than other two bottom cell modules, in order to prevent overdischarge, in a switch periods, first make second switch pipe and the 3rd switching tube conducting, now electric current flows through the second bottom cell module, the 3rd bottom cell module, the first energy storage inductor, second switch pipe and the 3rd switching tube, and the first energy storage inductor starts energy storage; Make it turn off after second switch pipe and the 3rd switching tube conducting certain hour, now electric current releases energy to the first bottom cell module by the fly-wheel diode of the first switching tube; If the voltage of the second bottom cell module is lower than other two bottom cell modules, in order to prevent overdischarge, a kind of situation is the voltage of voltage higher than the 3rd bottom cell module of the first bottom cell module, then in a switch periods, first make the first switching tube conducting, now electric current flows through the first bottom cell module, the first inductance and the first switching tube, and the first inductance starts energy storage; Make it turn off after first switching tube conducting certain hour, now electric current releases energy to the second bottom cell module by the fly-wheel diode of second switch pipe; Another kind of situation is the voltage of voltage higher than the first bottom cell module of the 3rd bottom cell module, then in a switch periods, first make the 3rd switching tube conducting, now electric current flows through the 3rd bottom cell module, the second energy storage inductor and the 3rd switching tube, and the second energy storage inductor starts energy storage; Make it turn off after 3rd switching tube conducting certain hour, now electric current releases energy to the second bottom cell module by the fly-wheel diode of second switch pipe; If the voltage of the 3rd bottom cell module is lower than other two bottom cell modules, in order to prevent overdischarge, in a switch periods, first make the first switching tube and the conducting of second switch pipe, now electric current flows through the first bottom cell module, the second bottom cell module, the second energy storage inductor, the first switching tube and second switch pipe, and the second energy storage inductor starts energy storage; Make it turn off after first switching tube and second switch pipe conducting certain hour, now electric current is released energy to the 3rd bottom cell module by the fly-wheel diode of the 3rd switching tube.
Compared with prior art, the utility model tool has the following advantages and technique effect:
The utility model adopts battery pack layering equalizing circuit, dynamic bidirectional non-dissipative equalizing between the battery pack that realization is made up of 3 bottom cell block coupled in series, optimization battery pack usefulness, prevents the phenomenons such as the overcharge of cell, overdischarge, overtemperature or overcurrent.Battery pack main control circuit exports control signal, realize cooperatively interacting of the dynamic equalization between cell in bottom cell module and bottom cell module, improve the active volume of battery pack, ensure that all cells do not occur overcharge and overdischarge in charging and discharging process, break away from the short-board effect of battery pack, extend the service life cycle of battery pack, reduce system maintenance cost.
Accompanying drawing explanation
Fig. 1 is battery pack layering equalizing circuit structure chart.
Fig. 2 is balanced subelement schematic diagram.
Fig. 3 is bottom cell module equalizing circuit structure chart.
Fig. 4 is the course of work schematic diagram of three cell groups in charging process.
Fig. 5 is the course of work schematic diagram of three cell groups in discharge process.
Fig. 6 is the course of work schematic diagram of bottom cell module in charging process.
Fig. 7 is the course of work schematic diagram of bottom cell module in discharge process.
Embodiment
Elaborating to embodiment of the present utility model below in conjunction with accompanying drawing, (the utility model only relates to equalizing circuit part, control circuit is circuit parameter values programming realization and the setting that those skilled in the art can refer to existing embody rule, in order to meet the usual communicative habits of this area, guaranteeing under explicit prerequisite, the direct representation of following Individual elements symbol, to reach short and sweet expression effect, such as, in this area, directly represent the first switching tube with S1).
Fig. 1 is battery pack layering equalizing circuit structure chart.This circuit is made up of the inductance of bottom cell module and correspondence thereof and switching tube, bottom cell module control circuit and battery pack main control circuit.Control signal is exported by battery pack main control circuit, distribute the operating time order of bottom cell module control circuit and switching tube (S1 ~ S3), make the dynamic bidirectional non-dissipative equalizing realized between each bottom cell module and between each cell in bottom cell module in charge and discharge process.Three bottom cell modules are composed in series by the first bottom cell module 1, second bottom cell module 2 and the 3rd bottom cell module 3, and the positive pole of the first bottom cell module 1 meets power supply VCC, the minus earth GND of the 3rd bottom cell module 3; Each bottom cell module is controlled by the bottom cell module control circuit of correspondence; Each switching tube forms on the source electrode of MOSFET and drain electrode by diodes in parallel; The source electrode of the MOSFET of the first switching tube is connected with power supply VCC, the drain electrode of the MOSFET of the first switching tube S1 is connected with the source electrode of the MOSFET of second switch pipe S2, the drain electrode of the MOSFET of second switch pipe is connected with the source electrode of the MOSFET of the 3rd switching tube S3, the grounded drain GND of the MOSFET of the 3rd switching tube.
Further, in charging process, if the voltage of the first bottom cell module 1 is higher than other two bottom cell modules, in order to prevent overcharge, in a switch periods, first make the first switching tube S1 conducting, now electric current flows through the first bottom cell module 1, S1 and the first energy storage inductor L1, and inductance starts energy storage; Make it turn off after first switching tube S1 conducting certain hour, now electric current releases energy to the second bottom cell module 2 and the 3rd bottom cell module 3 by the fly-wheel diode of second switch pipe S2 and the 3rd switching tube S3; If the voltage of the second bottom cell module 2 is higher than other two bottom cell modules, in order to prevent overcharge, in a switch periods, first make second switch pipe S2 conducting, now electric current flows through the second bottom cell module 2, second switch pipe S2, the first energy storage inductor L1 and the second energy storage inductor L2, and the first energy storage inductor L1 and the second energy storage inductor L2 starts energy storage; Make it turn off after second switch pipe S2 conducting certain hour, now electric current releases energy to the first bottom cell module 1 and the 3rd bottom cell module 3 respectively by the fly-wheel diode of the first switching tube S1 and the 3rd switching tube S3; If the voltage of the 3rd bottom cell module 3 is higher than other two bottom cell modules, in order to prevent overcharge, in a switch periods, first make the 3rd switching tube S3 conducting, now electric current flows through the 3rd bottom cell module 3, the 3rd switching tube S3 and energy storage inductor L2, and inductance starts energy storage; Make it turn off after 3rd switching tube S3 conducting certain hour, now electric current releases energy to the first bottom cell module 1 and the first bottom cell module 1 by the fly-wheel diode of the first switching tube S1 and second switch pipe S2;
In discharge process, if the voltage of the first bottom cell module 1 is lower than other two bottom cell modules, in order to prevent overdischarge, in a switch periods, first make second switch pipe S2 and the 3rd switching tube S3 conducting, now electric current flows through the second bottom cell module 2, the 3rd bottom cell module 3, first energy storage inductor L1, second switch pipe S2 and the 3rd switching tube S3, and the first energy storage inductor L1 starts energy storage; Make it turn off after second switch pipe S2 and the 3rd switching tube S3 conducting certain hour, now electric current releases energy to the first bottom cell module 1 by the fly-wheel diode of the first switching tube S1; If the voltage of the second bottom cell module 2 is lower than other two bottom cell modules, in order to prevent overdischarge, a kind of situation is the voltage of voltage higher than the 3rd bottom cell module 3 of the first bottom cell module 1, then in a switch periods, first make the first switching tube S1 conducting, now electric current flows through the first bottom cell module 1, first inductance L 1 and the first switching tube S1, and the first inductance L 1 starts energy storage; Make it turn off after first switching tube S1 conducting certain hour, now electric current releases energy to the second bottom cell module 2 by the fly-wheel diode of second switch pipe S2; Another kind of situation is the voltage of voltage higher than the first bottom cell module 1 of the 3rd bottom cell module 3, then in a switch periods, first make the 3rd switching tube S3 conducting, now electric current flows through the 3rd bottom cell module 3, second energy storage inductor L2 and the 3rd switching tube S3, and the second energy storage inductor L2 starts energy storage; Make it turn off after 3rd switching tube S3 conducting certain hour, now electric current is released energy to the second bottom cell module 2 by the fly-wheel diode of second switch pipe S2.If the voltage of the 3rd bottom cell module 3 is lower than other two bottom cell modules, in order to prevent overdischarge, in a switch periods, first make the first switching tube S1 and second switch pipe S2 conducting, now electric current flows through the first bottom cell module 1, second bottom cell module 2, second energy storage inductor L2, the first switching tube S1 and second switch pipe S2, and the second energy storage inductor L2 starts energy storage; Make it turn off after first switching tube S1 and second switch pipe S2 conducting certain hour, now electric current is released energy to the 3rd bottom cell module 3 by the fly-wheel diode of the 3rd switching tube S3.
Fig. 2 is balanced subelement schematic diagram.Each balanced subelement is made up of an energy storage inductor L, two MOSFET and two fly-wheel diodes, and upper brachium pontis MOSFET is Q
a, lower brachium pontis MOSFET is Q
b.Two diodes are connected in parallel on the source electrode of two MOSFET respectively with in drain electrode.Q
asource electrode and Q
bdrain electrode and energy storage inductor L one end be connected, Q
adrain electrode as external connection end a, Q
agrid as external connection end b, Q
bgrid as external connection end c, Q
bsource electrode as the other end of external connection end d, L as external connection end e.External connection end b, c are connected with control circuit, are outputed signal the break-make of control MOSFET by control circuit.The balanced subelement be connected with the first bottom cell module 1, second bottom cell module 2, cell 1 or cell 2, external connection end a is connected with the positive pole of corresponding bottom cell module or cell, and external connection end e is connected with the negative pole of corresponding bottom cell module or cell.External connection end d connects the negative pole of bottom cell module 4 or B4.The balanced subelement be connected with the 3rd bottom cell module 3, bottom cell module 4, cell 3 or cell 4, external connection end e is connected with the positive pole of corresponding bottom cell module or cell, and external connection end d is connected with the negative pole of corresponding bottom cell module or cell.External connection end a connects the positive pole of the first bottom cell module 1 or B1.
Fig. 3 is bottom cell module equalizing circuit structure chart, and it is made up of cell (B1, B2, B3, B4), bottom cell module control circuit and balanced subelement.Four cells are connected in series, and all balanced with one subelement of each cell is connected.In balanced subelement, the break-make of MOSFET is controlled by bottom cell module control circuit.The operation principle of bottom cell module is as follows.
In charging process, if the voltage of B1 (or B2) is higher than all monomers in corresponding bottom cell module, in order to prevent overcharge, in a switch periods, first make B1(or B2) S1a(or S2a in corresponding balanced subelement) conducting, now electric current flows through cell B1(or B2), S1a(or S2a) and energy storage inductor L1(or L2), inductance starts energy storage.S1a(or S2a) make it turn off after conducting certain hour, now electric current is by S1b(or S2b) fly-wheel diode release energy to B3 and B4.If the voltage of B3 (or B4) is higher than all monomers in corresponding bottom cell module, in order to prevent overcharge, in a switch periods, first make B3(or B4) S3b(or S4b in corresponding balanced subelement) conducting, now electric current flows through cell B3(or B4), S3b(or S4b) and energy storage inductor L3(or L4), inductance starts energy storage.S3b(or S4b) make it turn off after conducting certain hour, now electric current is by S3a(or S4a) fly-wheel diode release energy to B1 and B2.
In discharge process, if the voltage of B1 (or B2) is lower than all monomers in corresponding bottom cell module, in order to prevent overdischarge, in a switch periods, first make B1(or B2) S1b(or S2b in corresponding balanced subelement) conducting, now electric current flows through cell B2, B3, B4(or B3, B4), S1b(or S2b) and energy storage inductor L1(or L2), inductance starts energy storage.S1b(or S2b) make it turn off after conducting certain hour, now electric current is by S1a(or S2a) fly-wheel diode release energy to B1(or B2).If the voltage of B3 (or B4) is lower than all monomers in corresponding bottom cell module, in order to prevent overdischarge, in a switch periods, first make B3(or B4) S3a(or S4a in corresponding balanced subelement) conducting, now electric current flows through cell B1, B2(or B1, B2, B3), S1b(or S2b) and energy storage inductor L3(or L4), inductance starts energy storage.S3a(or S4a) make it turn off after conducting certain hour, now electric current is by S3b(or S4b) fly-wheel diode release energy to B3(or B4).
Fig. 4 is the course of work schematic diagram of three cell groups in charging process.If the voltage of the first bottom cell module 1 is higher than other two bottom cell modules, in order to prevent overcharge, in a switch periods, first make S1 conducting, now electric current flows through the first bottom cell module 1, S1 and energy storage inductor L1, and inductance starts energy storage.It is made to turn off after S1 conducting certain hour, now electric current is released energy to the second bottom cell module 2 and the 3rd bottom cell module 3 by the fly-wheel diode of S2 and S3, achieves the transfer of energy from the first bottom cell module 1 to the second bottom cell module 2 and the 3rd bottom cell module 3.
Fig. 5 is the course of work schematic diagram of three cell groups in discharge process.If the voltage of the first bottom cell module 1 is lower than other two bottom cell modules, in order to prevent overdischarge, in a switch periods, first make S2 and S3 conducting, now electric current flows through the second bottom cell module 2, the 3rd bottom cell module 3, L1, S2 and S3, and inductance L 1 starts energy storage.Make it turn off after S2 and S3 conducting certain hour, now electric current is released energy to the first bottom cell module 1 by the fly-wheel diode of S1, achieves the transfer of energy from the second bottom cell module 2 and the 3rd bottom cell module 3 to the first bottom cell module 1.
Fig. 6 is the course of work schematic diagram of bottom cell module in charging process.In charging process, if the voltage at B1 two ends is higher than other monomers, in order to prevent B1 overcharge, in a switch periods, first make the S1a conducting corresponded in the balanced electronic circuit of B1, then current i
l1flow through B1, S1a and energy storage inductor L1, inductance L 1 starts energy storage.Make it turn off after S1a conducting certain hour, now electric current is by fly-wheel diode, L1 and B of S1b
2, B
3, B
4release energy to B2, B3, B4, achieve energy from B1 to B2, the transfer of B3, B4.
Fig. 7 is the course of work schematic diagram of bottom cell module in discharge process.In discharge process, if the voltage at B1 two ends is lower than other monomers, in order to avoid B1 overdischarge, in a switch periods, make the S1b conducting corresponded in the balanced electronic circuit of B1, then electric current flows through B2, B3, B4, S1b and energy storage inductor L1, and inductance L 3 starts energy storage.S1b makes it turn off after opening certain hour, and now electric current releases energy to B1 by the fly-wheel diode of S1a, L1 and B1, achieves the transfer of energy from B2, B3, B4 to B1.
Claims (4)
1. a battery pack layering equalizing circuit, is characterized in that: comprise battery pack, three bottom cell module control circuits and battery pack main control circuit, battery pack comprises three bottom cell modules, the corresponding switching tube of each bottom cell module; A bottom cell module is connected with a bottom cell module control circuit, three bottom cell block coupled in series connect, three corresponding switching tubes also connect in turn, common point between adjacent bottom cell module is connected by energy storage inductor with the common point between adjacent switch pipe, control signal is exported by battery pack main control circuit, control the work of bottom cell module control circuit and switching tube, make the dynamic bidirectional non-dissipative equalizing realized between each bottom cell module and between each cell in bottom cell module in charge and discharge process.
2. battery pack layering equalizing circuit according to claim 1, it is characterized in that: three bottom cell modules are made up of the first bottom cell module, the second bottom cell module and the 3rd bottom cell block coupled in series, the positive pole of the first bottom cell module connects power supply, the minus earth of the 3rd bottom cell module; Each bottom cell module is controlled by the bottom cell module control circuit of correspondence; Each switching tube forms on the source electrode of MOSFET and drain electrode by diodes in parallel; The source electrode of the MOSFET of the first switching tube is connected with power supply, the drain electrode of the MOSFET of the first switching tube is connected with the source electrode of the MOSFET of second switch pipe, the drain electrode of the MOSFET of second switch pipe is connected with the source electrode of the MOSFET of the 3rd switching tube, the grounded drain of the MOSFET of the 3rd switching tube.
3. battery pack layering equalizing circuit according to claim 1, it is characterized in that, described battery pack is made up of lead-acid battery, lithium ion battery, ultracapacitor or nickel-cadmium cell.
4. battery pack layering equalizing circuit according to claim 1, is characterized in that, each bottom cell module is made up of four cells (B1, B2, B3, B4) and balanced subelement; Four cells are connected in series, and all balanced with one subelement of each cell is connected; Each balanced subelement is with the MOSFET of fly-wheel diodes and balanced subelement energy storage inductor to form by two, and the MOSFET of two band fly-wheel diodes is for drawing together upper brachium pontis MOSFET(Q
a) and lower brachium pontis MOSFET(Q
b), upper brachium pontis MOSFET(Q
a) source electrode and lower brachium pontis MOSFET(Q
b) drain electrode be all connected with one end of energy storage inductor; Upper brachium pontis MOSFET(Q
a) drain electrode as the first output (a), upper brachium pontis MOSFET(Q
a) grid as the second output (b), lower brachium pontis MOSFET(Q
b) grid as the 3rd output (c), lower brachium pontis MOSFET(Q
b) source electrode as the 4th output (d), the energy storage inductor other end is as the 5th output (e); 5th output (e) of the subelement balanced with of the connection common point between neighboring unit cell connects, and the intermediate point after four cell series connection connects the 5th output (e) of two balanced subelements; In balanced subelement, the break-make of MOSFET is controlled by bottom cell module control circuit.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520714724.2U CN204947676U (en) | 2015-09-15 | 2015-09-15 | A kind of battery pack layering equalizing circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520714724.2U CN204947676U (en) | 2015-09-15 | 2015-09-15 | A kind of battery pack layering equalizing circuit |
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| CN204947676U true CN204947676U (en) | 2016-01-06 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106532851A (en) * | 2016-12-16 | 2017-03-22 | 华南理工大学 | Equalizing circuit capable of extending 3n energy storage units |
| CN108155696A (en) * | 2018-01-25 | 2018-06-12 | 昆明理工大学 | A kind of double balancing energy device of lithium-ion battery systems and its control method |
| EP3907847A4 (en) * | 2019-11-18 | 2022-06-01 | LG Energy Solution, Ltd. | Cell balancing apparatus, battery apparatus including same, and cell balancing method |
-
2015
- 2015-09-15 CN CN201520714724.2U patent/CN204947676U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106532851A (en) * | 2016-12-16 | 2017-03-22 | 华南理工大学 | Equalizing circuit capable of extending 3n energy storage units |
| CN106532851B (en) * | 2016-12-16 | 2023-06-20 | 华南理工大学 | Equalizing circuit capable of expanding 3n energy storage units |
| CN108155696A (en) * | 2018-01-25 | 2018-06-12 | 昆明理工大学 | A kind of double balancing energy device of lithium-ion battery systems and its control method |
| EP3907847A4 (en) * | 2019-11-18 | 2022-06-01 | LG Energy Solution, Ltd. | Cell balancing apparatus, battery apparatus including same, and cell balancing method |
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