Summary of the invention
In order to overcome, the precision that in existing measurement battery pack, each cell voltage circuit exists is low, the high in cost of production shortcoming, with overcome passive equilibrium and exist euqalizing current little, the heat management difficulty, easily reduce the shortcomings such as battery cycle life, the utility model provides a kind of novel solid switching network circuit, this circuit is drawn out to the positive and negative electrode of each battery in series battery on the input/output terminal of this switching network circuit, by this input/output terminal, corresponding battery is carried out to voltage measurement and balanced management.
The utility model solves the technical scheme that its technical problem adopts: if the series-connected cell joint number is even number, and battery Cell
1, Cell
2, Cell
3cell
2n-1, Cell
2n-1, Cell
2nbe connected into successively battery pack, 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 respectively N-type field effect transistor T
l1, T
l3t
l2n-1drain electrode, T
l1, T
l3t
l2n-1source electrode connect respectively N-type field effect transistor T
r1, T
r3t
r2n-1source electrode, Cell
2cell
2n-2, Cell
2npositive pole connect respectively N-type field effect transistor T
l2t
l2n-2, T
l2ndrain electrode, T
l2t
l2n-2, T
l2nsource electrode connect respectively N-type field effect transistor T
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
00drain electrode and N-type field effect transistor T
01source 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
00source electrode connect T
e0source electrode form negative sense input/output terminal I/O-, T
01drain electrode connect T
e1drain electrode form forward input/output terminal I/O+, if the series-connected cell joint number is odd number, battery Cell
1, Cell
2, Cell
3cell
2n-1, Cell
2n, Cell
2n+1be connected into successively battery pack, 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 respectively N-type field effect transistor T
l1, T
l3t
l2n-1, T
l2n+1drain electrode, T
l1, T
l3t
l2n-1, T
l2n+1source electrode connect respectively N-type field effect transistor T
r1, T
r3t
r2n-1, T
r2n+1source electrode, Cell
2cell
2npositive pole connect respectively N-type field effect transistor T
l2t
l2ndrain electrode, T
l2t
l2nsource electrode connect respectively N-type field effect transistor T
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
00drain electrode and N-type field effect transistor T
01source 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
00source electrode connect T
e0source electrode form negative sense input/output terminal I/O-, T
01drain electrode connect T
e1drain electrode form forward input/output terminal I/O+, wherein n represents random natural number.
The beneficial effects of the utility model are that circuit structure is simple, and measure error is little, and higher euqalizing current can be provided.
The accompanying drawing explanation
Below in conjunction with drawings and Examples, the utility model is further illustrated.
Fig. 1 and Fig. 2 are schematic diagrams of the present utility model.
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
00, T
01it is the 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
00, G
01respectively 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
00, T
01grid.I/O+ is the forward input/output terminal, and I/O-is the negative sense input/output terminal.In figure, dotted line represents abridged battery, N-type field effect transistor and connecting line thereof.
Embodiment
What Fig. 1 showed is the working method while connecting the even number batteries in battery pack.In Fig. 1, battery Cell in series battery
1, Cell
3cell
2n-1positive pole connect respectively N-type field effect transistor T
l1, T
l3t
l2n-1drain electrode, T
l1, T
l3t
l2n-1source electrode connect respectively N-type field effect transistor T
r1, T
r3t
r2n-1source electrode, battery Cell
2cell
2n-2, Cell
2npositive pole connect respectively N-type field effect transistor T
l2t
l2n-2, T
l2ndrain electrode, T
l2t
l2n-2, T
l2nsource electrode connect respectively N-type field effect transistor T
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
00drain electrode and N-type field effect transistor T
01source 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
00source electrode connect T
e0source electrode form negative sense input/output terminal I/O-, T
01drain electrode connect T
e1drain electrode form forward input/output terminal I/O+, wherein n represents random natural number, in figure, dotted line represents abridged battery, N-type field effect transistor and connecting line thereof.
Measure or balancing battery Cell
1the time, at G
l1, G
r1, G
l0, G
r0, G
01, G
e0on add the logical one signal, N-type field effect transistor T
l0, T
r0, T
l1, T
r1, T
01, 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
1anodal short circuit, I/O-and Cell
1the negative pole short circuit, therefore, can be by I/O+ and I/O-two ends Measurement accuracy Cell
1voltage or to Cell
1carry out the charge and discharge balanced management.
Measure or balancing battery Cell
2the time, at G
l2, G
r2, G
l1, G
r1, G
e1, G
00on add the logical one signal, N-type field effect transistor T
l2, T
r2, T
l1, T
r1, T
e1, T
00conducting, 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
2anodal short circuit, I/O-and Cell
2the negative pole short circuit, therefore, can be by I/O+ and I/O-two ends Measurement accuracy Cell
2voltage or to Cell
2carry out the charge and discharge balanced management.
Measure or balancing battery Cell
3the time, at G
l3, G
r3, G
l2, G
r2, G
01, G
e0on add the logical one signal, N-type field effect transistor T
l3, T
r3, T
l2, T
r2, T
01, 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
3anodal short circuit, I/O-and Cell
3the negative pole short circuit, therefore, can be by I/O+ and I/O-two ends Measurement accuracy Cell
3voltage or to Cell
3carry out the charge and discharge balanced management.
Measure or balancing battery Cell
2n-1the time, at G
l2n-1, G
r2n-1, G
l2n-2,g
r2n-2,g
01, G
e0on add the logical one signal, N-type field effect transistor T
l2n-1, T
r2n-1, T
l2n-2, T
r2n-2, T
01, 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-1anodal short circuit, I/O-and Cell
2n-1the negative pole short circuit, therefore, can be by I/O+ and I/O-two ends Measurement accuracy Cell
2n-1voltage or to Cell
2n-1carry out the charge and discharge balanced management.
Measure or balancing battery Cell
2nthe time, at G
l2n, G
r2n, G
l2n-1, G
r2n-1, G
e1, G
00on add the logical one signal, N-type field effect transistor T
l2n, T
r2n, T
l2n-1, T
r2n-1, T
e1, T
00conducting, 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
2nanodal short circuit, I/O-and Cell
2nthe negative pole short circuit, therefore, can be by I/O+ and I/O-two ends Measurement accuracy Cell
2nvoltage or to Cell
2ncarry out the charge and discharge balanced management.
For being connected on Cell
3and Cell
2n-1between measurement or the balanced way of battery, can be according to battery Cell
2n-1and Cell
2nmeasured or balanced mode is analogized.
What Fig. 2 showed is the working method while connecting the odd number batteries in battery pack.In Fig. 2, battery Cell in series battery
1, Cell
3cell
2n-1, Cell
2n+1positive pole connect respectively N-type field effect transistor T
l1, T
l3t
l2n-1, T
l2n+1drain electrode, T
l1, T
l3t
l2n-1, T
l2n+1source electrode connect respectively N-type field effect transistor T
r1, T
r3t
r2n-1, T
r2n+1source electrode, battery Cell
2cell
2npositive pole connect respectively N-type field effect transistor T
l2t
l2ndrain electrode, T
l2t
l2nsource electrode connect respectively N-type field effect transistor T
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
00drain electrode and N-type field effect transistor T
01source 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
00source electrode connect T
e0source electrode form negative sense input/output terminal I/O-, T
01drain electrode connect T
e1drain electrode form forward input/output terminal I/O+, wherein n represents random natural number, in figure, dotted line represents abridged battery, N-type field effect transistor and connecting line thereof.
Measure or balancing battery Cell
1the time, at G
l1, G
r1, G
l0, G
r0, G
01, G
e0on add the logical one signal, N-type field effect transistor T
l0, T
r0, T
l1, T
r1, T
01, 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
1anodal short circuit, I/O-and Cell
1the negative pole short circuit, therefore, can be by I/O+ and I/O-two ends Measurement accuracy Cell
1voltage or to Cell
1carry out the charge and discharge balanced management.
Measure or balancing battery Cell
2the time, at G
l2, G
r2, G
l1, G
r1, G
e1, G
00on add the logical one signal, N-type field effect transistor T
l2, T
r2, T
l1, T
r1, T
e1, T
00conducting, 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
2anodal short circuit, I/O-and Cell
2the negative pole short circuit, therefore, can be by I/O+ and I/O-two ends Measurement accuracy Cell
2voltage or to Cell
2carry out the charge and discharge balanced management.
Measure or balancing battery Cell
3the time, at G
l3, G
r3, G
l2, G
r2, G
01, G
e0on add the logical one signal, N-type field effect transistor T
l3, T
r3, T
l2, T
r2, T
01, 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
3anodal short circuit, I/O-and Cell
3the negative pole short circuit, therefore, can be by I/O+ and I/O-two ends Measurement accuracy Cell
3voltage or to Cell
3carry out the charge and discharge balanced management.
Measure or balancing battery Cell
2nthe time, at G
l2n, G
r2n, G
l2n-1, G
r2n-1, G
e1, G
00on add the logical one signal, N-type field effect transistor T
l2n, T
r2n, T
l2n-1, T
r2n-1, T
e1, T
00conducting, 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
2nanodal short circuit, I/O-and Cell
2nthe negative pole short circuit, therefore, can be by I/O+ and I/O-two ends Measurement accuracy Cell
2nvoltage or to Cell
2ncarry out the charge and discharge balanced management.
Measure or balancing battery Cell
2n+1the time, at G
l2n+1, G
r2n+1, G
l2n, G
r2n, G
01, G
e0on add the logical one signal, N-type field effect transistor T
l2n+1, T
r2n+1, T
l2n, T
r2n, T
01, 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+1anodal short circuit, I/O-and Cell
2n+1the negative pole short circuit, therefore, can be by I/O+ and I/O-two ends Measurement accuracy Cell
2n+1voltage or to Cell
2n+1carry out the charge and discharge balanced management.
For being connected on Cell
3and Cell
2nbetween measurement or the balanced way of battery, can be according to battery Cell
2nand Cell
2n+1measured or balanced mode is analogized.