Summary of the invention
In order to overcome, the precision that in existing measurement battery pack, each cell voltage circuit exists is low, high in cost of production shortcoming, to there is euqalizing current little with overcoming passive equilibrium, heat management difficulty, the shortcomings such as easy reduction battery cycle life, the invention provides a kind of novel solid switching network circuit, the positive and negative electrode of battery each in series battery is drawn out on the input/output terminal of this switching network circuit by this circuit, carries out voltage measurement and balanced management by this input/output terminal to corresponding battery.
The technical solution adopted for the present invention to solve the technical problems: if series-connected cell joint number is even number, battery Cell
1, Cell
2, Cell
3cell
2n-2, Cell
2n-1, Cell
2nbe connected into battery pack successively, the positive pole of battery pack is Cell
2npositive pole, the negative pole of battery pack is Cell
1negative pole, Cell
1, Cell
3cell
2n-1positive pole connect N-type field effect transistor T respectively
l1, T
l3t
l2n-1drain electrode, T
l1, T
l3t
l2n-1source electrode connect N-type field effect transistor T respectively
r1, T
r3t
r2n-1source electrode, Cell
2cell
2n-2, Cell
2npositive pole connect N-type field effect transistor T respectively
l2t
l2n-2, T
l2ndrain electrode, T
l2t
l2n-2, T
l2nsource electrode connect N-type field effect transistor T respectively
r2t
r2n-2, T
r2nsource electrode, Cell
1negative pole and N-type field effect transistor T
l0drain electrode connect, T
l0source electrode connect N-type field effect transistor T
r0source electrode, T
r1, T
r3t
r2n-1drain electrode be connected, and connect N-type field effect transistor T
o0drain electrode and N-type field effect transistor T
o1source electrode, T
r0, T
r2t
r2n-2, T
r2ndrain electrode be connected, and connect N-type field effect transistor T
e0drain electrode and N-type field effect transistor T
e1source electrode, T
o0source electrode connect T
e0source electrode form negative sense input/output terminal I/O-, T
o1drain electrode connect T
e1drain electrode form forward input/output terminal I/O+, if series-connected cell joint number is odd number, battery Cell
1, Cell
2, Cell
3cell
2n-1, Cell
2n, Cell
2n+1be connected into battery pack successively, the positive pole of battery pack is Cell
2n+1positive pole, the negative pole of battery pack is Cell
1negative pole, Cell
1, Cell
3cell
2n-1, Cell
2n+1positive pole connect N-type field effect transistor T respectively
l1, T
l3t
l2n-1, T
l2n+1drain electrode, T
l1, T
l3t
l2n-1, T
l2n+1source electrode connect N-type field effect transistor T respectively
r1, T
r3t
r2n-1, T
r2n+1source electrode, Cell
2cell
2npositive pole connect N-type field effect transistor T respectively
l2t
l2ndrain electrode, T
l2t
l2nsource electrode connect N-type field effect transistor T respectively
r2t
r2nsource electrode, Cell
1negative pole and N-type field effect transistor T
l0drain electrode connect, T
l0source electrode connect N-type field effect transistor T
r0source electrode, T
r1, T
r3t
r2n-1, T
r2n+1drain electrode be connected, and connect N-type field effect transistor T
o0drain electrode and N-type field effect transistor T
o1source electrode, T
r0, T
r2t
r2ndrain electrode be connected, and connect N-type field effect transistor T
e0drain electrode and N-type field effect transistor T
e1source electrode, T
o0source electrode connect T
e0source electrode form negative sense input/output terminal I/O-, T
o1drain electrode connect T
e1drain electrode form forward input/output terminal I/O+, wherein n represents random natural number.
The invention has the beneficial effects as follows that circuit structure is simple, measure error is little, can provide higher euqalizing current.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the present invention is further described.
Fig. 1 and Fig. 2 is schematic diagram of the present invention.
In Fig. 1 and Fig. 2, Cell
1, Cell
2, Cell
3cell
2n-2, Cell
2n-1, Cell
2n, Cell
2n+1be battery, they are composed in series battery pack as shown in the figure successively.T
l0, T
r0, T
l1, T
r1, T
l2, T
r2, T
l3, T
r3t
l2n-2, T
r2n-2, T
l2n-1, T
r2n-1, T
l2n, T
r2n, T
l2n+1, T
r2n+1, T
e0, T
e1, T
o0, T
o1it is N-type field effect transistor.G
l0, G
r0, G
l1, G
r1, G
l2, G
r2, G
l3, G
r3g
l2n-2, G
r2n-2, G
l2n-1, G
r2n-1, G
l2n, G
r2n, G
l2n+1, G
r2n+1, G
e0, G
e1, G
o0, G
o1t respectively
l0, T
r0, T
l1, T
r1, T
l2, T
r2, T
l3, T
r3t
l2n-2, T
r2n-2, T
l2n-1, T
r2n-1, T
l2n, T
r2n, T
l2n+1, T
r2n+1, T
e0, T
e1, T
o0, T
o1grid.I/O+ is forward input/output terminal, and I/O-is negative sense input/output terminal.Represented by dotted arrows abridged battery, N-type field effect transistor and connecting line thereof in figure.
Embodiment
Fig. 1 display be when connect in battery pack even number batteries time working method.In Fig. 1, battery Cell in series battery
1, Cell
3cell
2n-1positive pole connect N-type field effect transistor T respectively
l1, T
l3t
l2n-1drain electrode, T
l1, T
l3t
l2n-1source electrode connect N-type field effect transistor T respectively
r1, T
r3t
r2n-1source electrode, battery Cell
2cell
2n-2, Cell
2npositive pole connect N-type field effect transistor T respectively
l2t
l2n-2, T
l2ndrain electrode, T
l2t
l2n-2, T
l2nsource electrode connect N-type field effect transistor T respectively
r2t
r2n-2, T
r2nsource electrode, battery Cell
1negative pole and N-type field effect transistor T
l0drain electrode connect, T
l0source electrode connect N-type field effect transistor T
r0source electrode, T
r1, T
r3t
r2n-1drain electrode be connected, and connect N-type field effect transistor T
o0drain electrode and N-type field effect transistor T
o1source electrode, T
r0, T
r2t
r2n-2, T
r2ndrain electrode be connected, and connect N-type field effect transistor T
e0drain electrode and N-type field effect transistor T
e1source electrode, T
o0source electrode connect T
e0source electrode form negative sense input/output terminal I/O-, T
o1drain electrode connect T
e1drain electrode form forward input/output terminal I/O+, wherein n represents random natural number, represented by dotted arrows abridged battery, N-type field effect transistor and connecting line thereof in figure.
Measure or balancing battery Cell
1time, at G
l1, G
r1, G
l0, G
r0, G
o1, G
e0on add logical one signal, N-type field effect transistor T
l0, T
r0, T
l1, T
r1, T
o1, T
e0conducting, other N-type field effect transistor keeps off state, because the internal resistance of N-type field effect transistor is lower, can be similar to and think I/O+ and Cell
1positive pole short circuit, I/O-and Cell
1negative pole short circuit, therefore, can by I/O+ and I/O-two ends Measurement accuracy Cell
1voltage or to Cell
1carry out charge and discharge balanced management.
Measure or balancing battery Cell
2time, at G
l2, G
r2, G
l1, G
r1, G
e1, G
o0on add logical one signal, N-type field effect transistor T
l2, T
r2, T
l1, T
r1, T
e1, T
o0conducting, other N-type field effect transistor keeps off state, because the internal resistance of N-type field effect transistor is lower, can be similar to and think I/O+ and Cell
2positive pole short circuit, I/O-and Cell
2negative pole short circuit, therefore, can by I/O+ and I/O-two ends Measurement accuracy Cell
2voltage or to Cell
2carry out charge and discharge balanced management.
Measure or balancing battery Cell
3time, at G
l3, G
r3, G
l2, G
r2, G
o1, G
e0on add logical one signal, N-type field effect transistor T
l3, T
r3, T
l2, T
r2, T
o1, T
e0conducting, other N-type field effect transistor keeps off state, because the internal resistance of N-type field effect transistor is lower, can be similar to and think I/O+ and Cell
3positive pole short circuit, I/O-and Cell
3negative pole short circuit, therefore, can by I/O+ and I/O-two ends Measurement accuracy Cell
3voltage or to Cell
3carry out charge and discharge balanced management.
Measure or balancing battery Cell
2n-1time, at G
l2n-1, G
r2n-1, G
l2n-2, G
r2n-2, G
o1, G
e0on add logical one signal, N-type field effect transistor T
l2n-1, T
r2n-1, T
l2n-2, T
r2n-2, T
o1, T
e0conducting, other N-type field effect transistor keeps off state, because the internal resistance of N-type field effect transistor is lower, can be similar to and think I/O+ and Cell
2n-1positive pole short circuit, I/O-and Cell
2n-1negative pole short circuit, therefore, can by I/O+ and I/O-two ends Measurement accuracy Cell
2n-1voltage or to Cell
2n-1carry out charge and discharge balanced management.
Measure or balancing battery Cell
2ntime, at G
l2n, G
r2n, G
l2n-1, G
r2n-1, G
e1, G
o0on add logical one signal, N-type field effect transistor T
l2n, T
r2n, T
l2n-1, T
r2n-1, T
e1, T
o0conducting, other N-type field effect transistor keeps off state, because the internal resistance of N-type field effect transistor is lower, can be similar to and think I/O+ and Cell
2npositive pole short circuit, I/O-and Cell
2nnegative pole short circuit, therefore, can by I/O+ and I/O-two ends Measurement accuracy Cell
2nvoltage or to Cell
2ncarry out charge and discharge balanced management.
For being connected on Cell
3and Cell
2n-1between the measurement of battery or balanced way, can according to battery Cell
2n-1and Cell
2ncarry out measuring or the mode of equilibrium is analogized.
Fig. 2 display be when connect in battery pack odd number batteries time working method.In Fig. 2, battery Cell in series battery
1, Cell
3cell
2n-1, Cell
2n+1positive pole connect N-type field effect transistor T respectively
l1, T
l3t
l2n-1, T
l2n+1drain electrode, T
l1, T
l3t
l2n-1, T
l2n+1source electrode connect N-type field effect transistor T respectively
r1, T
r3t
r2n-1, T
r2n+1source electrode, battery Cell
2cell
2npositive pole connect N-type field effect transistor T respectively
l2t
l2ndrain electrode, T
l2t
l2nsource electrode connect N-type field effect transistor T respectively
r2t
r2nsource electrode, battery Cell
1negative pole and N-type field effect transistor T
l0drain electrode connect, T
l0source electrode connect N-type field effect transistor T
r0source electrode, T
r1, T
r3t
r2n-1, T
r2n+1drain electrode be connected, and connect N-type field effect transistor T
o0drain electrode and N-type field effect transistor T
o1source electrode, T
r0, T
r2t
r2ndrain electrode be connected, and connect N-type field effect transistor T
e0drain electrode and N-type field effect transistor T
e1source electrode, T
o0source electrode connect T
e0source electrode form negative sense input/output terminal I/O-, T
o1drain electrode connect T
e1drain electrode form forward input/output terminal I/O+, wherein n represents random natural number, represented by dotted arrows abridged battery, N-type field effect transistor and connecting line thereof in figure.
Measure or balancing battery Cell
1time, at G
l1, G
r1, G
l0, G
r0, G
o1, G
e0on add logical one signal, N-type field effect transistor T
l0, T
r0, T
l1, T
r1, T
o1, T
e0conducting, other N-type field effect transistor keeps off state, because the internal resistance of N-type field effect transistor is lower, can be similar to and think I/O+ and Cell
1positive pole short circuit, I/O-and Cell
1negative pole short circuit, therefore, can by I/O+ and I/O-two ends Measurement accuracy Cell
1voltage or to Cell
1carry out charge and discharge balanced management.
Measure or balancing battery Cell
2time, at G
l2, G
r2, G
l1, G
r1, G
e1, G
o0on add logical one signal, N-type field effect transistor T
l2, T
r2, T
l1, T
r1, T
e1, T
o0conducting, other N-type field effect transistor keeps off state, because the internal resistance of N-type field effect transistor is lower, can be similar to and think I/O+ and Cell
2positive pole short circuit, I/O-and Cell
2negative pole short circuit, therefore, can by I/O+ and I/O-two ends Measurement accuracy Cell
2voltage or to Cell
2carry out charge and discharge balanced management.
Measure or balancing battery Cell
3time, at G
l3, G
r3, G
l2, G
r2, G
o1, G
e0on add logical one signal, N-type field effect transistor T
l3, T
r3, T
l2, T
r2, T
o1, T
e0conducting, other N-type field effect transistor keeps off state, because the internal resistance of N-type field effect transistor is lower, can be similar to and think I/O+ and Cell
3positive pole short circuit, I/O-and Cell
3negative pole short circuit, therefore, can by I/O+ and I/O-two ends Measurement accuracy Cell
3voltage or to Cell
3carry out charge and discharge balanced management.
Measure or balancing battery Cell
2ntime, at G
l2n, G
r2n, G
l2n-1, G
r2n-1, G
e1, G
o0on add logical one signal, N-type field effect transistor T
l2n, T
r2n, T
l2n-1, T
r2n-1, T
e1, T
o0conducting, other N-type field effect transistor keeps off state, because the internal resistance of N-type field effect transistor is lower, can be similar to and think I/O+ and Cell
2npositive pole short circuit, I/O-and Cell
2nnegative pole short circuit, therefore, can by I/O+ and I/O-two ends Measurement accuracy Cell
2nvoltage or to Cell
2ncarry out charge and discharge balanced management.
Measure or balancing battery Cell
2n+1time, at G
l2n+1, G
r2n+1, G
l2n, G
r2n, G
o1, G
e0on add logical one signal, N-type field effect transistor T
l2n+1, T
r2n+1, T
l2n, T
r2n, T
o1, T
e0conducting, other N-type field effect transistor keeps off state, because the internal resistance of N-type field effect transistor is lower, can be similar to and think I/O+ and Cell
2n+1positive pole short circuit, I/O-and Cell
2n+1negative pole short circuit, therefore, can by I/O+ and I/O-two ends Measurement accuracy Cell
2n+1voltage or to Cell
2n+1carry out charge and discharge balanced management.
For being connected on Cell
3and Cell
2nbetween the measurement of battery or balanced way, can according to battery Cell
2nand Cell
2n+1carry out measuring or the mode of equilibrium is analogized.