CN104201731A - Series connection battery pack two-way charging and discharging equalization circuit based on inductor energy storage - Google Patents
Series connection battery pack two-way charging and discharging equalization circuit based on inductor energy storage Download PDFInfo
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- CN104201731A CN104201731A CN201410395370.XA CN201410395370A CN104201731A CN 104201731 A CN104201731 A CN 104201731A CN 201410395370 A CN201410395370 A CN 201410395370A CN 104201731 A CN104201731 A CN 104201731A
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Abstract
The invention discloses a series connection battery pack two-way charging and discharging equalization circuit based on inductor energy storage. At least three battery single bodies are connected in series, at most seven battery single bodies are connected in series, a series connection battery pack is divided into an upper portion and a lower portion, the connection point of the upper portion and the lower portion is N, the upper portion includes battery single bodies from the positive end of the series connection battery pack to the connection point N, the lower portion includes the battery single bodies from the connection point N to the negative end of the series connection battery pack, m is an odd number, n is an even number larger than or equal to 2, m=n-1 or m=n+1, and m <=7. An equalization sub circuit connected with odd batteries is an odd equalization circuit, and an equalization sub circuit connected with even batteries is an even equalization circuit. By means of the circuit, overcharging and overdischarging are avoided in the charging and discharging process, the series connection battery pack unequalization is avoided, the battery pack available capacity is improved, the maintenance and replacement period of the series connection battery pack is reduced, the service life of the battery pack is prolonged, and the cost of hybrid electric vehicles, electric automobiles and energy storage power stations is reduced.
Description
Technical field
The present invention relates to a kind of series battery balancing technique, especially a kind of series battery Bidirectional charging-discharging equalizing circuit based on inductive energy storage of the battery management system for mixed power electric car, pure electric automobile or storage station.
Background technology
Series-connected cell is after a plurality of charge and discharge cycles, and the distribution of the residual capacity of each battery cell roughly there will be three kinds of situations: the residual capacity of indivedual battery cells is higher; The residual capacity of indivedual battery cells is on the low side; The residual capacity residual capacity higher and indivedual battery cells of indivedual battery cells is on the low side.
For above-mentioned three kinds of situations, Chinese scholars has all proposed the solution of oneself.Situation as higher in the residual capacity for indivedual battery cells, there is researcher to propose parallel resistance shunting, it falls the energy of the higher battery cell of residual capacity by controlling corresponding switching device by resistance consumption, the method wastes energy, and in balanced process, produced a large amount of heat, increased the load of battery thermal management.Also have researcher to propose the equalizing circuits such as bi-directional DC-DC equalization, coaxial transformer equalization, these circuit have all adopted transformer, and the cost of equalizing circuit is increased.
The method of the balanced control of lithium ion battery group at present, the Expenditure Levels of circuit to energy in balancing procedure, can be divided into energy dissipation type and the large class of energy non-dissipative type two.According to equalization function classification, can be divided into charge balancing, equalization discharge and dynamic equalization.Charge balancing refers to the equilibrium in charging process, is generally when batteries monomer voltage reaches set point, to start equilibrium, by reducing charging current, prevents from overcharging.Equalization discharge is the equilibrium in discharge process, by preventing overdischarge to the low cell makeup energy of dump energy.Dynamic equalization mode combines the advantage of charge balancing and equalization discharge, and it is, in whole charge and discharge process, battery pack is carried out to equilibrium, makes the more perfect function of equalizing circuit.
Summary of the invention
The object of the invention is to adopt a kind of equalizing circuit (EQU) to guarantee that overcharging and overdischarge does not appear in the monomer in battery pack in charging and discharging process in the battery management system of series battery, improve the unbalanced phenomenon of series battery, improve the active volume of battery pack, reduce maintenance and the replacement cycle of series battery, extend the useful life of battery pack, reduce the cost of hybrid vehicle, electric automobile and storage station.When in battery pack, any one monomer energy is too high, can be by the balancing energy of this monomer to other all residual monomers of battery pack, when any one monomer energy is too low in battery pack, can give the too low monomer of this energy by the balancing energy of other all residual monomers of battery pack.
To achieve these goals, the present invention is achieved by following technical proposals.
A kind of series battery Bidirectional charging-discharging equalizing circuit based on inductive energy storage, described series battery has anode VCC and negative terminal GND, series battery is divided into part, lower part, the tie point N of upper part and lower part, anode VCC is upper part to the battery cell of tie point N, tie point N is lower part to the battery cell of negative terminal GND, upper part battery cell be take tie point N as starting point, anode VCC is terminal, and by odd number, in turn to battery cell numbering, upper part battery cell is strange battery; Lower part series-connected cell monomer be take tie point N as starting point, and negative terminal GND is terminal, since 2, by even number, in turn battery cell is numbered, and lower part battery cell is even battery; M is odd number, and n is more than or equal to 2 even number, m
7, n
6, the number of upper part battery cell is (m+1)/2, and the number of lower part battery cell is n/2, and the number of the number of upper part battery cell and lower part battery cell is identical or than the number of lower part battery cell many; Bidirectional charging-discharging equalizing circuit comprises two groups of metal-oxide-semiconductors, the number of first group of metal-oxide-semiconductor is (m+1)/2+1, the drain electrode of each metal-oxide-semiconductor in first group of metal-oxide-semiconductor is connected successively with source electrode, in two ends after connection, one end is source electrode, the other end is drain electrode, wherein drain electrode connects battery pack anode VCC, and source electrode connects battery pack negative terminal GND, and source electrode connects the metal-oxide-semiconductor called after metal-oxide-semiconductor S of GND
o, from metal-oxide-semiconductor S
othe metal-oxide-semiconductor connecting starts, and the metal-oxide-semiconductor cut-off being connected with VCC to drain electrode, numbers in turn by odd number; The number of second group of metal-oxide-semiconductor is (n/2)+1, the drain electrode of each metal-oxide-semiconductor in second group of metal-oxide-semiconductor is connected successively with source electrode, in two ends after connection, one end is source electrode, the other end is drain electrode, drain electrode connects battery pack anode VCC, source electrode connects battery pack negative terminal GND, and drain electrode connects the metal-oxide-semiconductor called after metal-oxide-semiconductor S of battery pack anode VCC
e, from metal-oxide-semiconductor S
ethe metal-oxide-semiconductor connecting starts, and the metal-oxide-semiconductor cut-off being connected with GND to source electrode, numbers by even number in turn since 2; If m=n+1, circuit comprises m energy storage inductor, if n=m+1, circuit comprises n energy storage inductor, all energy storage inductor first ends are a end, the second end is b end, and the negative pole of the battery cell being connected with VCC connects a end of an energy storage inductor, and the b end of this energy storage inductor connects the source electrode of numbering maximum metal-oxide-semiconductor in first group of metal-oxide-semiconductor; The positive pole of the battery cell being connected with GND connects a end of an energy storage inductor, and the b end of this energy storage inductor connects the drain electrode of numbering maximum metal-oxide-semiconductor in second group of metal-oxide-semiconductor; Tie point N place, top and the bottom connects a end of two energy storage inductors, and in these two energy storage inductors, the b of energy storage inductor end is connected with the source electrode that is numbered 1 metal-oxide-semiconductor, and the b of another energy storage inductor holds with the drain electrode that is numbered 2 metal-oxide-semiconductor and is connected; The positive and negative terminal tie point of all the other battery cells all connects a end of an energy storage inductor, numbers with battery cell the b end that the drain electrode of consistent metal-oxide-semiconductor and the tie point of source electrode are connected this energy storage inductor.The control signal of the grid reception control circuit of all metal-oxide-semiconductors, control circuit is realized the balanced object of equalizing circuit to battery pack by controlling the closed and disconnected of metal-oxide-semiconductor.
Further, in described balanced electronic circuit, the grid of all metal-oxide-semiconductors connects the control circuit of battery management system, and turning on and off by control circuit of metal-oxide-semiconductor controlled.
Further preferred, the battery in described battery cell is lead-acid battery or lithium ion battery.
Further preferred, the frequency size of the control signal of described control circuit is 10khz-20khz.
Further preferred, the duty ratio of described control circuit control signal meets energy storage inductor and resets within each signal period, i.e. the electric current of energy storage inductor risings of first starting from scratch, finally drops to again zero.
Further, the balanced electronic circuit connecting with strange battery is strange balanced electronic circuit, and the balanced electronic circuit connecting with even battery is even balanced electronic circuit.For strange battery B
i(i=1,3,5,7) and strange balanced electronic circuit S
ithe upper brachium pontis metal-oxide-semiconductor S that (i=1,3,5,7) comprise
u, lower brachium pontis metal-oxide-semiconductor S
d, and the metal-oxide-semiconductor S of battery cell parallel connection
iand the first energy storage inductor L
ij, the second energy storage inductor L
ki.In charging process, if B
ibattery cell energy is too high, for avoiding B
iovercharge, closed and battery cell B
imetal-oxide-semiconductor S in parallel
i, brachium pontis metal-oxide-semiconductor S in disconnection
u, lower brachium pontis metal-oxide-semiconductor S
d, as metal-oxide-semiconductor S
iwhen closed, battery cell B
ito the first energy storage inductor L
ij, the second energy storage inductor L
kicharging, in energy storage inductor, Current rise carries out energy storage, as metal-oxide-semiconductor S
iduring disconnection, the first energy storage inductor L
ijby the body diode afterflow of upper brachium pontis metal-oxide-semiconductor, the odd battery cell that numbering is greater than to i charges, the second energy storage inductor L
kiby the body diode afterflow of lower brachium pontis metal-oxide-semiconductor, the strange battery cell and all even battery cells that numbering are less than to i charge, and realize energy from B
itransfer to battery pack remaining power monomer.In discharge process, if B
imonomer energy is too low, for avoiding B
ioverdischarge, disconnects and battery cell B
imetal-oxide-semiconductor S in parallel
i, brachium pontis metal-oxide-semiconductor S in closure
u, lower brachium pontis metal-oxide-semiconductor S
d, the strange battery that now all numberings are greater than i is to the first energy storage inductor L
ijcharging, all numberings are less than the strange battery of i and all even batteries to the second energy storage inductor L
kicharging, the first energy storage inductor L
ij, the second energy storage inductor L
kicurrent rise carries out energy storage, as upper brachium pontis metal-oxide-semiconductor S
u, lower brachium pontis metal-oxide-semiconductor S
dduring disconnection, the first energy storage inductor L
ij, the second energy storage inductor L
kiby metal-oxide-semiconductor S
ibody diode afterflow, be B
icharging, realizes battery cell B
iabsorb the energy of all remaining power monomers of battery pack.
For even battery B
i(i=2,4,6) and even balanced electronic circuit S
ithe upper brachium pontis metal-oxide-semiconductor S that (i=2,4,6) comprise
u, lower brachium pontis metal-oxide-semiconductor S
d, and the metal-oxide-semiconductor S of battery cell parallel connection
iand the first energy storage inductor L
ji, the second energy storage inductor L
ik.In charging process, if B
imonomer energy is too high, for avoiding B
iovercharge, closure and B
imetal-oxide-semiconductor S in parallel
i, brachium pontis metal-oxide-semiconductor S in disconnection
u, lower brachium pontis metal-oxide-semiconductor S
d, as metal-oxide-semiconductor S
iwhen closed, battery cell B
ito the first energy storage inductor L
ji, the second energy storage inductor L
ikcharging, the first energy storage inductor L
ji, the second energy storage inductor L
ikmiddle Current rise carries out energy storage, as metal-oxide-semiconductor S
iduring disconnection, the first energy storage inductor L
jiby the body diode afterflow of upper brachium pontis metal-oxide-semiconductor, the even battery cell and the odd battery cell that numbering are less than to i charge, the second energy storage inductor L
ikby the body diode afterflow of lower brachium pontis metal-oxide-semiconductor, all even battery cell that numbering is greater than to i charges, and realizes energy from B
itransfer to battery pack remaining power monomer.In discharge process, if B
imonomer energy is too low, for avoiding B
ioverdischarge, disconnects and B
imetal-oxide-semiconductor S in parallel
i, brachium pontis metal-oxide-semiconductor S in closure
u, lower brachium pontis metal-oxide-semiconductor S
d, now the even battery of all subscript numbering i is to the second energy storage inductor L
ikcharging, all numberings are less than the odd battery of even battery and institute of i to the first energy storage inductor L
jicharging, the first energy storage inductor L
ji, the second energy storage inductor L
ikcurrent rise carries out energy storage, as upper brachium pontis metal-oxide-semiconductor S
u, lower brachium pontis metal-oxide-semiconductor S
dduring disconnection, the first energy storage inductor L
ji, the second energy storage inductor L
ikby metal-oxide-semiconductor S
ibody diode afterflow, be battery cell B
icharging, realizes battery cell B
iabsorb the energy of all remaining power monomers of battery pack.
Compared with prior art, tool of the present invention has the following advantages and technique effect: the present invention is owing to adopting above-mentioned cell balancing in series battery battery management system, can guarantee that overcharging and overdischarge does not appear in each battery in charging and discharging process, improve the unbalanced phenomenon of series battery, improve the active volume of battery pack, extend the useful life of battery pack, reduce the cost of energy-storage system of accumulator in hybrid vehicle, electric automobile and power station.
Accompanying drawing explanation
Fig. 1 is circuit theory diagrams of the present invention.
Fig. 2 is balanced electronic circuit schematic diagram in execution mode.
Fig. 3 be take the equalizing circuit schematic diagram that four joint cells are example.
Fig. 4 a carries out the circuit theory diagrams of B1 electric discharge in equalization discharge process to battery cell B1.
Fig. 4 b carries out the circuit theory diagrams of B2, B3 in equalization discharge process, B4 charging to battery cell B1.
Fig. 4 c carries out the circuit theory diagrams of B2, B3 in charge balancing process, B4 electric discharge to battery cell B1.
Fig. 4 d carries out the circuit theory diagrams of B1 charging in charge balancing process to battery cell B1.
Fig. 5 a carries out the simulation result figure of equalization discharge process to battery cell B1.
Fig. 5 b carries out the simulation result figure of charge balancing process to battery cell B1.
Embodiment
In order to make those skilled in the art understand better object of the present invention and effect, below in conjunction with accompanying drawing, the specific embodiment of the present invention is elaborated, but enforcement of the present invention is not limited to this, if there is below the not special content describing in detail, be all that those skilled in the art can be with reference to existing techniques in realizing.
As Fig. 1, a kind of series battery Bidirectional charging-discharging equalizing circuit based on inductive energy storage, series battery anode VCC and negative terminal GND, series battery is divided into part, lower part, the tie point N of upper part and lower part, anode VCC is upper part to all battery cells of tie point N, tie point N is lower part to all battery cells of negative terminal GND, upper part battery cell be take tie point N as starting point, anode VCC is terminal, press odd number in turn to battery cell numbering, upper part battery cell is strange battery; Lower part series-connected cell monomer be take tie point N as starting point, and negative terminal GND is terminal, since 2, by even number, in turn battery cell is numbered, and lower part battery cell is even battery; M is odd number, and n is more than or equal to 2 even number, m
7, n
6, the number of upper part battery cell is (m+1)/2, and the number of lower part battery cell is n/2, and the number of the number of upper part battery cell and lower part battery cell is identical or than the number of lower part battery cell many; Equalizing circuit comprises two groups of metal-oxide-semiconductors, the number of first group of metal-oxide-semiconductor is (m+1)/2+1, the drain electrode of each metal-oxide-semiconductor in first group of metal-oxide-semiconductor is connected successively with source electrode, and in the two ends after connection, one end is source electrode, and the other end is drain electrode, wherein drain electrode connects battery pack anode VCC, source electrode connects battery pack negative terminal GND, and source electrode connects the metal-oxide-semiconductor called after metal-oxide-semiconductor So of GND, from the metal-oxide-semiconductor being connected with metal-oxide-semiconductor So, the metal-oxide-semiconductor cut-off being connected with VCC to drain electrode, numbers in turn by odd number; The number of second group of metal-oxide-semiconductor is (n/2)+1, the drain electrode of each metal-oxide-semiconductor in second group of metal-oxide-semiconductor is connected successively with source electrode, in two ends after connection, one end is source electrode, the other end is drain electrode, and drain electrode connects battery pack anode VCC, and source electrode connects battery pack negative terminal GND, drain electrode connects the metal-oxide-semiconductor called after metal-oxide-semiconductor Se of battery pack anode VCC, from the metal-oxide-semiconductor being connected with metal-oxide-semiconductor Se, the metal-oxide-semiconductor cut-off being connected with GND to source electrode, numbers by even number in turn since 2; If m=n+1, circuit comprises m energy storage inductor, if n=m+1, circuit comprises n energy storage inductor, all energy storage inductor first ends are a end, the second end is b end, and the negative pole of the battery cell being connected with VCC connects a end of an energy storage inductor, and the b end of this energy storage inductor connects the source electrode of numbering maximum metal-oxide-semiconductor in first group of metal-oxide-semiconductor; The positive pole of the battery cell being connected with GND connects a end of an energy storage inductor, and the b end of this energy storage inductor connects the drain electrode of numbering maximum metal-oxide-semiconductor in second group of metal-oxide-semiconductor; Tie point N place, top and the bottom connects a end of two energy storage inductors, and in these two energy storage inductors, the b of energy storage inductor end is connected with the source electrode that is numbered 1 metal-oxide-semiconductor, and the b of another energy storage inductor holds with the drain electrode that is numbered 2 metal-oxide-semiconductor and is connected; The positive and negative terminal tie point of all the other battery cells all connects a end of an energy storage inductor, numbers with battery cell the b end that the drain electrode of consistent metal-oxide-semiconductor and the tie point of source electrode are connected this energy storage inductor.The control signal of the grid reception control circuit of all metal-oxide-semiconductors, control circuit is realized the balanced object of equalizing circuit to battery pack by controlling the closed and disconnected of metal-oxide-semiconductor.
As shown in Figure 2, be balanced electronic circuit schematic diagram, for convenience of explanation, below the balanced electronic circuit that will connect with strange battery be strange balanced electronic circuit, the balanced electronic circuit connecting with even battery be the balanced electronic circuit of idol.Very (idol) balanced electronic circuit by with by two monomer series-connected energy storage inductor L of balancing battery
ij(L
ji), L
ki(L
ik) and all metal-oxide-semiconductor and metal-oxide-semiconductor S that is numbered strange (idol) number
o(S
e) form S
ifor with by the metal-oxide-semiconductor of balanced object parallel connection, for strange balanced electronic circuit, S
urepresentative and S
ion same branch road and numbering be greater than all metal-oxide-semiconductors of i, be called battery cell B
iupper brachium pontis metal-oxide-semiconductor, S
drepresentative and S
ion same branch road and numbering be less than all metal-oxide-semiconductors and the metal-oxide-semiconductor S of i
o, be called battery cell B
ilower brachium pontis metal-oxide-semiconductor; For even balanced electronic circuit, S
urepresentative and S
ion same branch road and numbering be less than all metal-oxide-semiconductors and the metal-oxide-semiconductor S of i
e, be called battery cell B
iupper brachium pontis metal-oxide-semiconductor, S
drepresentative and S
ion same branch road and numbering be greater than all metal-oxide-semiconductors of i, be called battery cell B
ilower brachium pontis metal-oxide-semiconductor.B
ifor by balanced object, for strange balanced electronic circuit, if i is 1, L
ki=L
1, L
ij=L
13if i is m, L
ki=L
(m-2) m, Lij=0, if 1<i<m, k=i-2, j=i+2; For even balanced electronic circuit, if i=2, L
ij=L
2, L
ki=L
24if, i=n, L
ki=0, L
ji=(n-2) n, if 2<i<n, L
ji=L
(i-2) i, Lik=L
i (i-2), control circuit discharges and recharges bidirectional equalization with disconnection to battery cell by controlling the closure of strange (idol) balanced electronic circuit metal-oxide-semiconductor.
For strange battery B
iwith strange balanced electronic circuit S
ithe upper brachium pontis metal-oxide-semiconductor S that (i=1,3,5,7) comprise
u, lower brachium pontis metal-oxide-semiconductor S
d, and the metal-oxide-semiconductor S of battery cell parallel connection
iand the first energy storage inductor L
ij, the second energy storage inductor L
ki.In charging process, if B
ibattery cell energy is too high, for avoiding B
iovercharge, closed and battery cell B
imetal-oxide-semiconductor S in parallel
i, brachium pontis metal-oxide-semiconductor S in disconnection
u, lower brachium pontis metal-oxide-semiconductor S
d, as metal-oxide-semiconductor S
iwhen closed, battery cell B
ito the first energy storage inductor L
ij, the second energy storage inductor L
kicharging, in energy storage inductor, Current rise carries out energy storage, as metal-oxide-semiconductor S
iduring disconnection, the first energy storage inductor L
ijby the body diode afterflow of upper brachium pontis metal-oxide-semiconductor, the odd battery cell that numbering is greater than to i charges, the second energy storage inductor L
kiby the body diode afterflow of lower brachium pontis metal-oxide-semiconductor, the strange battery cell and all even battery cells that numbering are less than to i charge, and realize energy from B
itransfer to battery pack remaining power monomer.In discharge process, if B
imonomer energy is too low, for avoiding B
ioverdischarge, disconnects and battery cell B
imetal-oxide-semiconductor S in parallel
i, brachium pontis metal-oxide-semiconductor S in closure
u, lower brachium pontis metal-oxide-semiconductor S
d, the strange battery that now all numberings are greater than i is to the first energy storage inductor L
ijcharging, all numberings are less than the strange battery of i and all even batteries to the second energy storage inductor L
kicharging, the first energy storage inductor L
ij, the second energy storage inductor L
kicurrent rise carries out energy storage, as upper brachium pontis metal-oxide-semiconductor S
u, lower brachium pontis metal-oxide-semiconductor S
dduring disconnection, the first energy storage inductor L
ij, the second energy storage inductor L
kiby metal-oxide-semiconductor S
ibody diode afterflow, be B
icharging, realizes battery cell B
iabsorb the energy of all remaining power monomers of battery pack.
For even battery B
i(i=2,4,6) and even balanced electronic circuit S
ithe upper brachium pontis metal-oxide-semiconductor S that (i=2,4,6) comprise
u, lower brachium pontis metal-oxide-semiconductor S
d, and the metal-oxide-semiconductor S of battery cell parallel connection
iand the first energy storage inductor L
ji, the second energy storage inductor L
ik.In charging process, if B
imonomer energy is too high, for avoiding B
iovercharge, closure and B
imetal-oxide-semiconductor S in parallel
i, brachium pontis metal-oxide-semiconductor S in disconnection
u, lower brachium pontis metal-oxide-semiconductor S
d, as metal-oxide-semiconductor S
iwhen closed, battery cell B
ito the first energy storage inductor L
ji, the second energy storage inductor L
ikcharging, the first energy storage inductor L
ji, the second energy storage inductor L
ikmiddle Current rise carries out energy storage, as metal-oxide-semiconductor S
iduring disconnection, the first energy storage inductor L
jiby the body diode afterflow of upper brachium pontis metal-oxide-semiconductor, the even battery cell and the odd battery cell that numbering are less than to i charge, the second energy storage inductor L
ikby the body diode afterflow of lower brachium pontis metal-oxide-semiconductor, all even battery cell that numbering is greater than to i charges, and realizes energy from B
itransfer to battery pack remaining power monomer.In discharge process, if B
imonomer energy is too low, for avoiding B
ioverdischarge, disconnects and B
imetal-oxide-semiconductor S in parallel
i, brachium pontis metal-oxide-semiconductor S in closure
u, lower brachium pontis metal-oxide-semiconductor S
d, now the even battery of all subscript numbering i is to the second energy storage inductor L
ikcharging, all numberings are less than the odd battery of even battery and institute of i to the first energy storage inductor L
jicharging, the first energy storage inductor L
ji, the second energy storage inductor L
ikcurrent rise carries out energy storage, as upper brachium pontis metal-oxide-semiconductor S
u, lower brachium pontis metal-oxide-semiconductor S
dduring disconnection, the first energy storage inductor L
ji, the second energy storage inductor L
ikby metal-oxide-semiconductor S
ibody diode afterflow, be battery cell B
icharging, realizes battery cell B
iabsorb the energy of all remaining power monomers of battery pack.
Figure 3 shows that and take the equalizing circuit schematic diagram that four joint cells are example, Fig. 4 a, Fig. 4 b are to be numbered 1 monomers B
1for example, work as B
1in energy during apparently higher than all the other monomers, to B
1carry out the schematic diagram of equalization discharge.Fig. 4 c, 4d are to be numbered 1 monomers B
1for example, work as B
1in energy while being starkly lower than all the other monomers, to B
1carry out the schematic diagram of charge balancing.Fig. 5 a is to be numbered 1 monomers B
1for example, work as B
1in energy during apparently higher than all the other monomers, to B
1carry out the simulation result figure of equalization discharge.Fig. 5 b is to be numbered 1 monomers B
1for example, work as B
1in energy while being starkly lower than all the other monomers, to B
1carry out the simulation result of charge balancing.
In to batteries charging process, work as B
1when the energy of monomer is too high, for preventing that it from overcharging, need to be to B
1carry out equalization discharge, in Fig. 4 a, control circuit is controlled metal-oxide-semiconductor S
1closure, upper brachium pontis metal-oxide-semiconductor S
3, lower brachium pontis metal-oxide-semiconductor S
odisconnect, now, cell B
1, the first energy storage inductor L
13, metal-oxide-semiconductor S
1, the second energy storage inductor L
1form closed-loop path, B
1to energy storage inductor (L
13, L
1) charge, the sense of current as shown by arrows in FIG., the first energy storage inductor L
13, the second energy storage inductor L
1carry out energy storage.As metal-oxide-semiconductor S
1when closing time reaches Preset Time value, disconnect metal-oxide-semiconductor S
1, brachium pontis metal-oxide-semiconductor S in closure
3, lower brachium pontis metal-oxide-semiconductor S
o, now in circuit curent change as shown in Figure 4 b, by monomer S
3body diode, the first energy storage inductor L
13, metal-oxide-semiconductor S
3, monomers B
3form closed-loop path, the first energy storage inductor L
13to monomers B
3charge, realize energy from monomers B
1to monomers B
3transfer.By lower brachium pontis metal-oxide-semiconductor S
obody diode, the second energy storage inductor L
1, monomers B
2, monomers B
4, lower brachium pontis metal-oxide-semiconductor S
oform closed-loop path, the second energy storage inductor L
1to monomer (B
2, B
4) charge, realize energy from monomers B
1to monomer (B
2, B
4) transfer, whole process implementation energy from monomers B
1to battery pack residual monomer (B
2, B
3, B
4) transfer.Fig. 5 a is for working as B
1in energy during apparently higher than all the other monomers, whole equalizing circuit is carried out to emulation, the change in voltage curve of each cell monomer can be found out monomers B from curve
1voltage reduce gradually, the voltage of all the other monomers raises gradually, finally reaches unanimity and reaches the coincident indicator that battery pack is set in advance.
Battery pack is being carried out to, in discharge process, work as monomers B
1energy when too low, for preventing its overdischarge, need to be to monomers B
1carry out charge balancing, in Fig. 4 c, control circuit is controlled metal-oxide-semiconductor S
1disconnect upper brachium pontis metal-oxide-semiconductor S
3, lower brachium pontis metal-oxide-semiconductor S
oclosure, the first energy storage inductor L
13, metal-oxide-semiconductor S
3, monomers B
3form closed-loop path, monomers B
3to the first energy storage inductor L
13charging, the second energy storage inductor L
1, monomers B
2, monomers B
4, lower brachium pontis metal-oxide-semiconductor S
oform closed-loop path, monomer (B
2, B
4) to the second energy storage inductor L
1charging, the sense of current as shown in the figure, the first energy storage inductor L
13, the second energy storage inductor L
1carry out energy storage.As metal-oxide-semiconductor S
3, lower brachium pontis metal-oxide-semiconductor S
oclosing time reaches while presetting time value, metal-oxide-semiconductor S
3, lower brachium pontis metal-oxide-semiconductor S
odisconnect, with B
1metal-oxide-semiconductor S in parallel
1closure, now in circuit the sense of current as shown in Fig. 4 d, by with B
1metal-oxide-semiconductor S in parallel
1body diode, the first energy storage inductor L
13, monomers B
1, the second energy storage inductor L
1, and B
1metal-oxide-semiconductor S in parallel
1form closed-loop path, the first energy storage inductor L
13, the second energy storage inductor L
1it is monomers B simultaneously
1charging, has realized energy from monomer (B
2, B
3, B
4) to monomers B
1transfer.Fig. 5 b is for working as B
1in energy while being starkly lower than all the other monomers, whole equalizing circuit is carried out to emulation, the change in voltage curve of each cell monomer can be found out monomers B from curve
1voltage raise gradually, each monomer voltage finally reaches unanimity and reaches the coincident indicator that battery pack is set in advance.
For B
1whole charge and discharge balancing process, finally realized energy from B
1transfer to all the other all residual monomers of battery pack or energy and transfer to B from all the other all residual monomers
1, realized B
1the object of two-way fast uniform.
As above can realize preferably the present invention and obtain aforementioned techniques effect of the present invention.
Claims (5)
1. the series battery Bidirectional charging-discharging equalizing circuit based on inductive energy storage, it is characterized in that described series battery has anode (VCC) and negative terminal (GND), series battery is divided into part, lower part, the tie point N of upper part and lower part, anode (VCC) is upper part to the battery cell of tie point N, tie point N is lower part to the battery cell of negative terminal (GND), upper part battery cell be take tie point N as starting point, anode (VCC) is terminal, press odd number in turn to battery cell numbering, upper part battery cell is strange battery; Lower part series-connected cell monomer be take tie point N as starting point, and negative terminal (GND) is terminal, since 2, by even number, in turn battery cell is numbered, and lower part battery cell is even battery; M is odd number, and n is more than or equal to 2 even number, m
7, n
6, the number of upper part battery cell is (m+1)/2, and the number of lower part battery cell is n/2, and the number of the number of upper part battery cell and lower part battery cell is identical or than the number of lower part battery cell many;
Bidirectional charging-discharging equalizing circuit comprises two groups of metal-oxide-semiconductors, the number of first group of metal-oxide-semiconductor is (m+1)/2+1, the drain electrode of each metal-oxide-semiconductor in first group of metal-oxide-semiconductor is connected successively with source electrode, in two ends after connection, one end is source electrode, the other end is drain electrode, wherein drain electrode connects battery pack anode (VCC), and source electrode connects battery pack negative terminal (GND), and source electrode connects the metal-oxide-semiconductor called after metal-oxide-semiconductor S of negative terminal (GND)
o, from metal-oxide-semiconductor S
othe metal-oxide-semiconductor connecting starts, and the metal-oxide-semiconductor cut-off being connected with anode (VCC) to drain electrode, numbers in turn by odd number; The number of second group of metal-oxide-semiconductor is (n/2)+1, the drain electrode of each metal-oxide-semiconductor in second group of metal-oxide-semiconductor is connected successively with source electrode, in two ends after connection, one end is source electrode, the other end is drain electrode, drain electrode connects battery pack anode (VCC), source electrode connects battery pack negative terminal (GND), and drain electrode connects the metal-oxide-semiconductor called after metal-oxide-semiconductor S of battery pack anode (VCC)
e, from metal-oxide-semiconductor S
ethe metal-oxide-semiconductor connecting starts, and the metal-oxide-semiconductor cut-off being connected with negative terminal (GND) to source electrode, numbers by even number in turn since 2; If m=n+1, circuit comprises m energy storage inductor, if n=m+1, circuit comprises n energy storage inductor, all energy storage inductor first ends are a end, the second end is b end, and the negative pole of the battery cell being connected with anode (VCC) connects a end of an energy storage inductor, and the b end of this energy storage inductor connects the source electrode of numbering maximum metal-oxide-semiconductor in first group of metal-oxide-semiconductor; The positive pole of the battery cell being connected with negative terminal (GND) connects a end of an energy storage inductor, and the b end of this energy storage inductor connects the drain electrode of numbering maximum metal-oxide-semiconductor in second group of metal-oxide-semiconductor; Tie point N place, top and the bottom connects a end of two energy storage inductors, and in these two energy storage inductors, the b of energy storage inductor end is connected with the source electrode that is numbered 1 metal-oxide-semiconductor, and the b of another energy storage inductor holds with the drain electrode that is numbered 2 metal-oxide-semiconductor and is connected; The positive and negative terminal tie point of all the other battery cells all connects a end of an energy storage inductor, numbers with battery cell the b end that the drain electrode of consistent metal-oxide-semiconductor and the tie point of source electrode are connected this energy storage inductor.
2. series battery Bidirectional charging-discharging equalizing circuit according to claim 1, is characterized in that, in described balanced electronic circuit, the grid of all metal-oxide-semiconductors connects the control circuit of battery management system, and turning on and off by control circuit of metal-oxide-semiconductor controlled.
3. two-way series battery set charge/discharge equalizing circuit according to claim 1, is characterized in that, the battery in described battery cell is lead-acid battery or lithium ion battery.
4. series battery Bidirectional charging-discharging equalizing circuit according to claim 2, is characterized in that, the frequency size of the control signal of described control circuit is 10khz-20khz.
5. series battery Bidirectional charging-discharging equalizing circuit according to claim 4, it is characterized in that, the duty ratio of described control circuit control signal meets energy storage inductor and resets within each signal period, i.e. the electric current of the energy storage inductor rising of first starting from scratch finally drops to again zero.
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|---|---|---|---|
| CN201410395370.XA CN104201731A (en) | 2014-08-12 | 2014-08-12 | Series connection battery pack two-way charging and discharging equalization circuit based on inductor energy storage |
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|---|---|---|---|
| CN201410395370.XA CN104201731A (en) | 2014-08-12 | 2014-08-12 | Series connection battery pack two-way charging and discharging equalization circuit based on inductor energy storage |
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| CN105162199A (en) * | 2015-09-15 | 2015-12-16 | 华南理工大学 | Layered balancing circuit for battery pack |
| CN106208176A (en) * | 2015-05-07 | 2016-12-07 | 王怀云 | A kind of energy transfer battery charging and discharging method, device and this device realize the method for energy transfer |
| CN106602647A (en) * | 2016-12-14 | 2017-04-26 | 华南理工大学 | Two-way nondestructive equalization circuit of parallel battery packs based on capacitive energy storage |
| CN106602648A (en) * | 2016-12-14 | 2017-04-26 | 华南理工大学 | Series battery pack bidirectional lossless balanced improved circuit based on inductor energy storage |
| CN106712168A (en) * | 2016-12-14 | 2017-05-24 | 华南理工大学 | Parallel battery pack two-way lossless equalization circuit based on inductance energy storage |
| CN106786865A (en) * | 2016-12-14 | 2017-05-31 | 华南理工大学 | A kind of two-way non-dissipative equalizing circuit of series battery based on capacitance energy storage |
| CN112234679A (en) * | 2020-10-27 | 2021-01-15 | 湖北亿纬动力有限公司 | Battery pack equalization circuit and equalization method thereof |
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Application publication date: 20141210 |