CN203012008U - Single cell voltage isolation detection apparatus - Google Patents
Single cell voltage isolation detection apparatus Download PDFInfo
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- CN203012008U CN203012008U CN 201220694754 CN201220694754U CN203012008U CN 203012008 U CN203012008 U CN 203012008U CN 201220694754 CN201220694754 CN 201220694754 CN 201220694754 U CN201220694754 U CN 201220694754U CN 203012008 U CN203012008 U CN 203012008U
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- resistance
- circuit
- isolating transformer
- voltage
- chip microcomputer
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Abstract
The utility model discloses a single cell voltage isolation detection apparatus which comprises an isolation transformer, an MOS transistor switching circuit, a rectification filter circuit, a sampling resistor circuit and a single-chip microcomputer. Objectives of the single cell voltage isolation detection apparatus are that the single-chip microcomputer realizes a loop formed by communicating a primary winding of the isolation transformer with the two ends of the cell by controlling the MOS transistor switching circuit, and performs connection control process of voltage detection as needed, and when the detection is not carried out, the MOS transistor switching circuit is cut off, and thus energy consumption caused by communication between the cell and the detection circuit is reduced; and then, a voltage signal is transmitted to a secondary winding and then sequentially passes through the rectification filter circuit and the sampling resistor circuit, and a voltage simulation signal is output to the single-chip microcomputer for analog-to-digital conversion, and real magnitude of voltage across two ends of the cell is calculated.
Description
[technical field]
The utility model relates to a kind of monomer battery voltage isolation detection device.
[background technology]
Detect the monomer battery voltage of series battery, because each cell connects floatingly, need to carry out isolation method and send into detecting unit and detect.Isolation detection mode commonly used is to adopt light-coupled isolation to detect at present, but because the detection error of cell voltage can not be too large, therefore will adopt the optocoupler of high linearity can accurately detect monomer battery voltage.The optocoupler price comparison of high linearity is high, uses when being unfavorable for producing in batches.
Therefore, be necessary to solve as above problem.
[utility model content]
The utility model has overcome the deficiency of above-mentioned technology, a kind of monomer battery voltage isolation detection device is provided, single-chip microcomputer drive to be controlled isolating transformer by the metal-oxide-semiconductor on-off circuit armature winding is communicated with the formation loop with battery two ends, can according to circumstances carry out the link control procedure of voltage detecting, reduced the consumption of the energy content of battery, then by after voltage signal current rectifying and wave filtering circuit and sampling resistor circuit successively, voltage analog signal is exported to the real voltage value that single-chip microcomputer carries out calculating after analog to digital conversion the battery two ends.
For achieving the above object, the utility model has adopted following technical proposal:
a kind of monomer battery voltage isolation detection device, include for the isolating transformer T1 of voltage isolation sample detecting and be used for controlling that isolating transformer T1 armature winding is connected to form the loop with battery two ends to the metal-oxide-semiconductor on-off circuit 2 of secondary winding transmission voltage signal, described isolating transformer T1 secondary winding output terminal is connected with current rectifying and wave filtering circuit 3 in turn, sampling resistor circuit 4, and be used for the single-chip microcomputer 5 that aanalogvoltage to 4 outputs of sampling resistor circuit carries out analog to digital conversion and calculates battery both end voltage value, described metal-oxide-semiconductor on-off circuit 2 control signal input ends are connected with single-chip microcomputer 5, described isolating transformer T1 armature winding two ends also are parallel with peak absorbing circuit 11.
Described peak absorbing circuit 11 includes resistance R 1, capacitor C 1 and diode D1, after being connected with capacitor C 1 one ends, described resistance R 1 one ends are connected with isolating transformer T1 armature winding one end, be connected with diode D1 negative pole after resistance R 1 other end is connected with capacitor C 1 other end, diode D1 is anodal to be connected with the isolating transformer T1 armature winding other end.
described metal-oxide-semiconductor on-off circuit 2 includes resistance R 2, resistance R 3, stabilivolt D3, and be used for to control the MOS switching tube Q1 that isolating transformer T1 armature winding and battery two ends are connected to form the loop, described stabilivolt D3 is anodal, resistance R 3 one ends, after being connected, MOS switching tube Q1 source electrode is connected with cell one utmost point, described stabilivolt D3 negative pole, resistance R 3 other ends and resistance R 2 one ends, MOS switching tube Q1 grid connects, described resistance R 2 other ends are connected with single-chip microcomputer 5 as switch driving circuit 2 control signal input ends, described MOS switching tube Q1 drain electrode is connected with isolating transformer T1 armature winding one end.
Described current rectifying and wave filtering circuit 3 includes the commutation diode D2 that is connected in series with isolating transformer T1 secondary winding forward output terminal, is connected in parallel to filter capacitor C2 between described commutation diode D2 negative pole and isolating transformer T1 secondary winding negative sense output terminal.
Described sampling resistor circuit 4 includes resistance R 4 and resistance R 5, described resistance R 4 and resistance R 5 are connected in series rear and 3 liang of output terminals of current rectifying and wave filtering circuit are connected in parallel, and the points of common connection that resistance R 4 is connected with resistance R is connected with single-chip microcomputer 5 analog to digital conversion input ends as sampling resistor circuit 4 analog voltage signal output terminals.
The beneficial effects of the utility model are:
1, single-chip microcomputer is communicated with the formation loop with battery two ends by the armature winding controlling the metal-oxide-semiconductor on-off circuit and realize isolating transformer, it carries out the link control procedure of voltage detecting as required, when not detecting, the metal-oxide-semiconductor on-off circuit disconnects, thereby reduced battery and often be communicated with testing circuit the consumption that causes energy, then, voltage signal is transferred to after secondary winding successively by current rectifying and wave filtering circuit and sampling resistor circuit, and voltage analog signal is exported to the real voltage value that single-chip microcomputer carries out calculating after analog to digital conversion the battery two ends.
2, native system is realized easily, the error recoverable, each component parameter of isolating transformer no-load voltage ratio, current rectifying and wave filtering circuit, sampling resistor circuit is known, can draw the relation of actual monomer battery voltage U1 and sampling resistor circuit sampling point voltage U2, U1=A*U2+B is arranged, wherein A is the relation curve slope, B is side-play amount, can determine by twice or above virtual voltage measured value the value of A, B about the binomial of U1, U2 in reality, then be solidificated in the program of single-chip microcomputer, such correction can improve the precision of voltage detecting greatly.
3, the isolation detection function of native system does not affect the normal operation of cell, and the actual motion of cell does not affect the accuracy of this voltage detecting yet, is conducive to actual utilization.
[description of drawings]
Fig. 1 is structure principle chart of the present utility model
Fig. 2 is circuit diagram of the present utility model.
[embodiment]
Be described in further detail below in conjunction with accompanying drawing and embodiment of the present utility model:
as shown in Figure 1, a kind of monomer battery voltage isolation detection device, include for the isolating transformer T1 of voltage isolation sample detecting and be used for controlling that isolating transformer T1 armature winding is connected to form the loop with battery two ends to the metal-oxide-semiconductor on-off circuit 2 of secondary winding transmission voltage signal, described isolating transformer T1 secondary winding output terminal is connected with current rectifying and wave filtering circuit 3 in turn, sampling resistor circuit 4, and be used for the single-chip microcomputer 5 that aanalogvoltage to 4 outputs of sampling resistor circuit carries out analog to digital conversion and calculates battery both end voltage value, described metal-oxide-semiconductor on-off circuit 2 control signal input ends are connected with single-chip microcomputer 5, described isolating transformer T1 armature winding two ends also are parallel with peak absorbing circuit 11.
As mentioned above, single-chip microcomputer 5 is communicated with the formation loop with battery two ends by the armature winding controlling metal-oxide-semiconductor on-off circuit 2 and realize isolating transformer T1, it carries out the link control procedure of voltage detecting as required, when not detecting, metal-oxide-semiconductor on-off circuit 2 disconnects, thereby reduced battery and often be communicated with testing circuit the consumption that causes energy, then, voltage signal is transferred to after secondary winding successively by current rectifying and wave filtering circuit 3 and sampling resistor circuit 4, and voltage analog signal is exported to the real voltage value that single-chip microcomputer 5 carries out calculating after analog to digital conversion the battery two ends.
As shown in Figure 2, in the present embodiment, described peak absorbing circuit 11 includes resistance R 1, capacitor C 1 and diode D1, after being connected with capacitor C 1 one ends, described resistance R 1 one ends are connected with isolating transformer T1 armature winding one end, after being connected with capacitor C 1 other end, resistance R 1 other end is connected with diode D1 negative pole, diode D1 is anodal to be connected with the isolating transformer T1 armature winding other end, absorbs the spike of primary coil by peak absorbing circuit 11.
described metal-oxide-semiconductor on-off circuit 2 includes resistance R 2, resistance R 3, stabilivolt D3, and be used for to control the MOS switching tube Q1 that isolating transformer T1 armature winding and battery two ends are connected to form the loop, described stabilivolt D3 is anodal, resistance R 3 one ends, after being connected, MOS switching tube Q1 source electrode is connected with cell one utmost point, described stabilivolt D3 negative pole, resistance R 3 other ends and resistance R 2 one ends, MOS switching tube Q1 grid connects, described resistance R 2 other ends are connected with single-chip microcomputer 5 as switch driving circuit 2 control signal input ends, described MOS switching tube Q1 drain electrode is connected with isolating transformer T1 armature winding one end.
As mentioned above, single-chip microcomputer 5 output pulse control signals are controlled the conducting of MOS switching tube Q1 on metal-oxide-semiconductor on-off circuit 2, thereby control isolating transformer T1 armature winding and battery two ends and be connected to form the loop, it carries out the link control procedure of voltage detecting as required, reduce battery and often be communicated with testing circuit the consumption that causes energy, sampled voltage signal by isolating transformer T1 secondary winding.
Described current rectifying and wave filtering circuit 3 includes the commutation diode D2 that is connected in series with isolating transformer T1 secondary winding forward output terminal, is connected in parallel to filter capacitor C2 between described commutation diode D2 negative pole and isolating transformer T1 secondary winding negative sense output terminal.
Described sampling resistor circuit 4 includes resistance R 4 and resistance R 5, described resistance R 4 and resistance R 5 are connected in series rear and 3 liang of output terminals of current rectifying and wave filtering circuit are connected in parallel, and the points of common connection that resistance R 4 is connected with resistance R is connected with single-chip microcomputer 5 analog to digital conversion input ends as sampling resistor circuit 4 analog voltage signal output terminals.
as mentioned above, be connected on the sampling resistor of two series connection, the voltage that single-chip microcomputer 5 gathers on sampling resistor, carry out calculating after AD changes the voltage of input point, and the function U1=A*U2+B between actual monomer battery voltage U1 and sampling resistor circuit 4 sample amplitude when reproduced U2, A, B can draw by actual measurement, wherein A is the relation curve slope, B is side-play amount, above-mentioned about U1, the binomial of U2 can be determined A by twice or above virtual voltage measured value, the value of B, if A=kD, wherein D is for controlling the dutycycle of MOS switching tube PWM, and k is relevant with the resistance of isolating transformer T1 no-load voltage ratio and resistance R 4 and resistance R 5, and the dividing potential drop of B and MOS switching tube Q1 and secondary commutation diode D2 is relevant, so by calibration, thereby draw the virtual voltage at cell two ends.
As mentioned above; what this case was protected is a kind of monomer battery voltage isolation detection device; single-chip microcomputer 5 drives the armature winding of controlling isolating transformer T1 and is communicated with the formation loop with battery two ends by metal-oxide-semiconductor on-off circuit 2; can according to circumstances carry out the link control procedure of voltage detecting; reduced the consumption of the energy content of battery; then by after voltage signal current rectifying and wave filtering circuit 3 and sampling resistor circuit 4 successively, voltage analog signal is exported to the real voltage value that single-chip microcomputer 5 carries out calculating after analog to digital conversion the battery two ends.All equivalents identical with this case structure or this case specific embodiment circuit all should be shown in the protection domain that falls into this case.
Claims (5)
1. monomer battery voltage isolation detection device, it is characterized in that including for the isolating transformer (T1) of voltage isolation sample detecting and be used for controlling that isolating transformer (T1) armature winding is connected to form the loop with battery two ends to the metal-oxide-semiconductor on-off circuit (2) of secondary winding transmission voltage signal, described isolating transformer (T1) secondary winding output terminal is connected with current rectifying and wave filtering circuit (3) in turn, sampling resistor circuit (4), and be used for the single-chip microcomputer (5) that aanalogvoltage to sampling resistor circuit (4) output carries out analog to digital conversion and calculates battery both end voltage value, described metal-oxide-semiconductor on-off circuit (2) control signal input end is connected with single-chip microcomputer (5), described isolating transformer (T1) armature winding two ends also are parallel with peak absorbing circuit (11).
2. a kind of monomer battery voltage isolation detection device according to claim 1, it is characterized in that described peak absorbing circuit (11) includes resistance R 1, capacitor C 1 and diode D1, after being connected with capacitor C 1 one ends, described resistance R 1 one ends are connected with isolating transformer (T1) armature winding one end, be connected with diode D1 negative pole after resistance R 1 other end is connected with capacitor C 1 other end, diode D1 is anodal to be connected with isolating transformer (T1) the armature winding other end.
3. a kind of monomer battery voltage isolation detection device according to claim 1, it is characterized in that described metal-oxide-semiconductor on-off circuit (2) includes resistance R 2, resistance R 3, stabilivolt D3, and be used for to control the MOS switching tube Q1 that isolating transformer (T1) armature winding and battery two ends are connected to form the loop, the described stabilivolt D3 utmost point, resistance R 3 one ends, after being connected, MOS switching tube Q1 source electrode is connected with cell one utmost point, described stabilivolt D3 negative pole, resistance R 3 other ends and resistance R 2 one ends, MOS switching tube Q1 grid connects, described resistance R 2 other ends are connected with single-chip microcomputer (5) as switch driving circuit (2) control signal input end, described MOS switching tube Q1 drain electrode is connected with isolating transformer (T1) armature winding one end.
4. a kind of monomer battery voltage isolation detection device according to claim 1, it is characterized in that described current rectifying and wave filtering circuit (3) includes the commutation diode D2 that is connected in series with isolating transformer (T1) secondary winding forward output terminal, be connected in parallel to filter capacitor C2 between described commutation diode D2 negative pole and isolating transformer (T1) secondary winding negative sense output terminal.
5. a kind of monomer battery voltage isolation detection device according to claim 1, it is characterized in that described sampling resistor circuit (4) includes resistance R 4 and resistance R 5, described resistance R 4 and resistance R 5 are connected in series rear and current rectifying and wave filtering circuit (3) two output terminals are connected in parallel, and the points of common connection that resistance R 4 is connected with resistance R is connected with single-chip microcomputer (5) analog to digital conversion input end as sampling resistor circuit (4) analog voltage signal output terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220694754 CN203012008U (en) | 2012-12-14 | 2012-12-14 | Single cell voltage isolation detection apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220694754 CN203012008U (en) | 2012-12-14 | 2012-12-14 | Single cell voltage isolation detection apparatus |
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| Publication Number | Publication Date |
|---|---|
| CN203012008U true CN203012008U (en) | 2013-06-19 |
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|---|---|---|---|
| CN 201220694754 Expired - Fee Related CN203012008U (en) | 2012-12-14 | 2012-12-14 | Single cell voltage isolation detection apparatus |
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| CN (1) | CN203012008U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103063905A (en) * | 2012-12-14 | 2013-04-24 | 王奉瑾 | Single battery voltage isolation detecting system |
-
2012
- 2012-12-14 CN CN 201220694754 patent/CN203012008U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103063905A (en) * | 2012-12-14 | 2013-04-24 | 王奉瑾 | Single battery voltage isolation detecting system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130619 Termination date: 20141214 |
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| EXPY | Termination of patent right or utility model |