CN106405209A - Storage battery end voltage detection apparatus - Google Patents
Storage battery end voltage detection apparatus Download PDFInfo
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- CN106405209A CN106405209A CN201610715217.XA CN201610715217A CN106405209A CN 106405209 A CN106405209 A CN 106405209A CN 201610715217 A CN201610715217 A CN 201610715217A CN 106405209 A CN106405209 A CN 106405209A
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- 238000001514 detection method Methods 0.000 title claims abstract description 49
- 238000004804 winding Methods 0.000 claims abstract description 28
- 230000005284 excitation Effects 0.000 claims abstract description 5
- 238000012545 processing Methods 0.000 claims description 13
- 238000006243 chemical reaction Methods 0.000 claims description 11
- 238000001914 filtration Methods 0.000 claims description 11
- 230000003321 amplification Effects 0.000 claims description 8
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 8
- 230000005611 electricity Effects 0.000 claims description 6
- 238000002955 isolation Methods 0.000 abstract description 11
- 239000003990 capacitor Substances 0.000 abstract 5
- 238000010586 diagram Methods 0.000 description 6
- 238000005259 measurement Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000002045 lasting effect Effects 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 230000003750 conditioning effect Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000004043 responsiveness Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/25—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/25—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques
- G01R19/2503—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques for measuring voltage only, e.g. digital volt meters (DVM's)
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- General Physics & Mathematics (AREA)
- Measurement Of Current Or Voltage (AREA)
Abstract
The invention relates to a storage battery end voltage detection apparatus. The apparatus includes an excitation current source module, a transformer, a diode, a capacitor, a first resistor and a second resistor. The excitation current source module outputs an excitation current to a primary winding of the transformer. One end of a secondary winding of the transformer is connected to the anode of the diode, and the other end is connected to a first end of the capacitor. A second end of the capacitor is connected to the cathode of the diode. A first end of the capacitor is connected to a negative end of a to-be-tested storage battery through the first resistor. The second end of the capacitor is connected to a positive end of the to-be-tested storage battery through the second resistor. According to the invention, the apparatus achieves isolated detection of the voltage at the storage battery end. The apparatus has low cost, simple circuit structure, and high isolation level and reliability.
Description
Technical field
The present invention relates to accumulator checking technical field, more particularly to a kind of accumulator voltage detection means.
Background technology
Battery often occurs that terminal voltage is uneven during long-time use, affects communication security.Therefore, to storage
It is significant that terminal voltage detecting implemented by battery.The accumulator voltage detection means adopting at present has following several：
(1) the accumulator voltage detection means based on relay switching
With reference to shown in Fig. 1, by driving relay C1 to Cn in turn, using relay contact by tested battery list
Body accesses a shared signal sampling loop, and other battery two ends are hanging, realizes each of batteries are stored
The terminal voltage of battery cell is sampled, and the shortcoming of this method is that the responsiveness of relay is slow, and there is finite number of time
Mechanical life and larger action noise.
(2) the accumulator voltage detection means based on serial analog-to-digital conversion
With reference to shown in Fig. 2, using serial analog-digital converter ADC, accumulator voltage is converted into the numeral letter of serial form
Number, serial data bus are transferred to by digital light-coupled isolation, the cell voltage of each data channel of being read back by DSP.This side
The shortcoming of method is that each road serial ADC needs independent accessory power supply, and signal conditioning circuit, data signal isolation structure are more multiple
Miscellaneous, and the high expensive of serial analog-digital converter ADC.
(3) the accumulator voltage detection means being compensated based on linear optical coupling or digital optocoupler
With reference to shown in Fig. 3, can achieve the accumulator voltage detection of isolation using linear optical coupling, but high cost.?
Can be substituted using the digital additional compensation circuit of optocoupler, but the shortcoming of digital optocoupler is the line of input and output for analog signal
Property poor, and temperature influence is larger, needs the temperature drift of digital optocoupler is corrected compensating with non-linear, electricity
Line structure is more complicated.
(4) the accumulator voltage detection means based on resistor network
With reference to shown in Fig. 4, potential-divider network is constituted using resistance, each battery of whole batteries is connected point voltage
Decay to electronic analog swtich acceptable degree.This circuit structure is simple, but this circuit measuring loop is returned with battery
Road is not isolated, and there is potential safety hazard, and carries out gradient decay using network resistor and can cause successively decreasing of sampling precision.
In sum, the accumulator voltage detection means in conventional art exist high cost, circuit structure complicated, every
From grade is low, the low problem of reliability.
Content of the invention
Based on this, for solving the problems of the prior art, the present invention provides a kind of accumulator voltage detection means, passes through
The isolation measurement of accumulator voltage realized by transformer, and low cost, circuit structure are simple, and isolation Level and reliability are all relatively
High.
For realizing above-mentioned technical purpose, the embodiment of the present invention employs the following technical solutions：
A kind of accumulator voltage detection means, including：Exciting current source module, transformer, diode, electric capacity, first
Resistance and second resistance；
Described exciting current source module output drive electric current is to the armature winding of described transformer；
One end of the secondary windings of described transformer is connected with the anode of described diode, and the of the other end and described electric capacity
One end connects, and the second end of described electric capacity is connected with the negative electrode of described diode；
The first end of described electric capacity is connected with the negative pole of tested battery by described first resistor, and the second of described electric capacity
End is connected with the positive pole of tested battery by described second resistance.
The accumulator voltage detection means of the present invention realizes accumulator voltage by applying exciting current to transformer
Detection, and transformer has highly developed processing technology it is easy to realize high-grade isolation.Transformer is static-magnetic
, there is not mechanical action, therefore there is lasting reliability in sensing element.In addition, the transformer in the present embodiment is easy to reality
The now automation processing of batch, and material is common material, has cost effect well.Therefore, the accumulator terminal of the present invention
Voltage check device can patrol and examine measurement with relatively low cost, higher isolation and reliable realization to multipath accumulator, and
And can be utilized resistance-capacitance network to realize voltage holding, reduce the impact to circuit-under-test for the measuring circuit further, ensure inspection
Survey precision.
Brief description
Fig. 1 is the electrical block diagram of the accumulator voltage detection means based on relay switching；
Fig. 2 is the electrical block diagram of the accumulator voltage detection means based on serial analog-to-digital conversion；
Fig. 3 is that the circuit structure of the accumulator voltage detection means being compensated based on linear optical coupling or digital optocoupler is illustrated
Figure；
Fig. 4 is the electrical block diagram of the accumulator voltage detection means based on resistor network；
Fig. 5 is a kind of optional electrical block diagram of accumulator voltage detection means of the present invention；
Fig. 6 is another kind of optional electrical block diagram of accumulator voltage detection means of the present invention；
Fig. 7 is the structural representation of exciting current source module in the embodiment of the present invention；
Fig. 8 is another optional electrical block diagram of accumulator voltage detection means of the present invention.
Specific embodiment
Below in conjunction with preferred embodiment and accompanying drawing, present disclosure is described in further detail.Obviously, hereafter institute
The embodiment of description is only used for explaining the present invention, rather than limitation of the invention.Based on the embodiment in the present invention, this area is general
The every other embodiment that logical technical staff is obtained under the premise of not making creative work, broadly falls into present invention protection
Scope.Although it should be appreciated that hereinafter adopting term " first ", " second " etc. to describe various information, these letters
Breath should not necessarily be limited by these terms, and these terms are only used for same type of information is distinguished from each other out.For example, without departing from this
In the case of bright scope, " first " information can also be referred to as " second " information, similar, and " second " information can also be referred to as
" first " information.It also should be noted that, for the ease of description, illustrate only part related to the present invention in accompanying drawing and
Not all content.
Fig. 5 is the accumulator voltage detection means principle schematic in one embodiment of the present invention, as Fig. 5 institute
Show, the accumulator voltage detection means in the present embodiment includes：Exciting current source module 10, transformer T, diode D1, electricity
Hold C1, first resistor R1 and second resistance R2.Wherein, exciting current source module 10 output drive electric current is first to transformer T
Level winding.One end of the secondary windings of transformer T is connected with the anode of diode D1, and the other end is connected with first end a of electric capacity C1
Connect, the second end b of electric capacity C2 is connected with the negative electrode of diode D1.
As shown in figure 5, first end a of electric capacity C1 is connected with the negative pole of tested battery 100 by first resistor R1, electric capacity
The second end b of C1 is connected with the positive pole of tested battery 100 by second resistance R2.
After the accumulator voltage detection means in the present embodiment and tested battery 100, tested battery 100 passes through
First resistor R1, second resistance R2 charge to electric capacity C1, charge after reaching balance, the voltage at electric capacity C1 two ends and tested battery
100 terminal voltage UxEqual.
Because transformer T can only transmit AC signal, in order to realize the measurement of direct current signal, excitation current source mould can be passed through
To the armature winding output drive electric current of transformer T, exciting current is coupled to secondary windings to block 10 by transformer T, by two poles
Pipe D1 is charged to electric capacity C1.
When the induced voltage that transformer T2 secondary windings produces is less than the voltage U at electric capacity C1 two endsxWhen, in diode D1 it is
Do not have electric current to pass through, exciting current source module 10 to after the armature winding output drive electric current of transformer T, T2 level of transformer
The voltage rapid increase of winding, will be charged to electric capacity C1 by diode D2, the voltage at electric capacity C1 two ends is from UxRise to Ux0, when
After excitation-off, electric capacity C1 discharges to tested battery 100, and electric capacity C1 both end voltage is recovered to Ux.Electromagnetism based on transformer
Inductively principle, in whole process, it is in line that the armature winding of transformer T also will produce one and electric capacity C1 both end voltage
The change voltage of sex ratio relation, that is,：With electric capacity C1 two ends voltage by UxRise to Ux0, the armature winding electricity of transformer T
Press synchronous also from UNRise to UN0, and UN/Ux=UN0/Ux0As long as therefore finding out linear scale factor, just can be by detection
The change voltage of transformer T armature winding is realizing the detection of tested battery 100 terminal voltage.
Therefore, when detecting the terminal voltage of battery using the accumulator voltage detection means in the present embodiment, first
Accumulator voltage detection means is calibrated, a known voltage source will be replaced with by tested battery 100 in Fig. 5
U0, then pass through exciting current source module 10 output drive electric current to the armature winding of transformer T, now at the beginning of detection transformer T
The change voltage that level winding produces, by this change voltage and U0Calculate linear scale factor k.To tested battery 100
Terminal voltage when being detected, by the armature winding of exciting current source module 10 output drive electric current to transformer T, and detect
The change voltage that detection transformer T armature winding produces, just can calculate tested battery then in conjunction with linear scale factor k
100 terminal voltage.
Accumulator voltage detection means in the present embodiment realizes the detection of accumulator voltage by transformer, and becomes
Depressor has highly developed processing technology it is easy to realize high-grade isolation.Transformer is static magnetic induction part, no
There is mechanical action, therefore there is lasting reliability.In addition, the transformer in the present embodiment is easily achieved the automatic of batch
Change processing, and material is common material, has cost effect well.
Further, in order to improve accuracy of detection, referring now still to the accumulator voltage detection shown in Fig. 5, in the present embodiment
Device also includes 3rd resistor R3, filtration module 20.3rd resistor R3 and filtration module 20 be connected in series after with the beginning of transformer T
Level winding parallel connects.The voltage at so armature winding two ends of transformer T is input to filtering mould after 3rd resistor R3 partial pressure
Block 20, as long as the voltage of then detection filter module 20 output just can calculate the terminal voltage of tested battery 100.
Preferably, in order to automatically export testing result, shown in reference Fig. 6, and in the lump with reference to Fig. 5, the storage in the present embodiment
Battery terminal voltage detection means may also include AD conversion module 30 and processing module 40, wherein processing module 40 can using MCU,
The devices such as CPU, FPGA.The input of AD conversion module 30 is connected with the output end of filtration module 20, AD conversion module 30 defeated
Go out end to be connected with the input of processing module 40.The voltage signal that AD conversion module 30 exports to filtration module 20 carries out modulus and turns
Change, generate data signal, and data signal is sent into processing module 40.With reference to the description above for calibration process, in calibration
When, data signal and known voltage source U that processing module 40 inputs according to AD conversion module 300Carry out processing and calculate, just
Can determine that linear scale factor k, then when the terminal voltage to tested battery 100 detects, processing module 40 is according to AD
The data signal of modular converter input and linear scale factor k just can calculate the terminal voltage of tested battery 100 automatically, and
Output result of calculation.
In a kind of optional embodiment, with reference to shown in Fig. 7, exciting current source module 10 include the 4th resistance R4, the
Five resistance R5, the 6th resistance R6, amplification module 101 and gate-controlled switch 102.Wherein, the input of amplification module 101 and the 4th
First end c of resistance R4 connects, and output end passes sequentially through the 5th resistance R5, gate-controlled switch 102, the 6th resistance R6 and transformer
It is grounded after the armature winding of T；The external driving pulse of second end d of the 4th resistance R4.As shown in fig. 7, gate-controlled switch 102 turns on
Afterwards, apply driving pulse at the 4th resistance R4, amplified module 101 passes through the 5th resistance R5 and the 6th resistance R6 after amplifying again
Metering function, can to transformer T armature winding apply exciting current.Wherein, amplification module 101 can be selected for various amplification electricity
Road or amplifying device, optionally, with reference to shown in Fig. 8, amplification module 101 includes the first NPN type triode Q1, the first NPN type three
The base stage of pole pipe Q1 is connected with first end c of the 4th resistance R4, and colelctor electrode is connected with gate-controlled switch 102 by the 5th resistance R5,
Grounded emitter.
Gate-controlled switch 102 can adopt all kinds of controllable switching devices, such as relay, MOSFET, IGBT etc..Optional
, with reference to shown in Fig. 8, gate-controlled switch 102 includes the 7th resistance R7 and the second NPN type triode Q2.Second NPN type triode Q2
Base stage be connected with the colelctor electrode of the first NPN type triode Q1 by the 5th resistance R5；The colelctor electrode of the second NPN type triode Q2
External voltage source VDD, and be connected with the base stage of the second NPN type triode Q2 by the 7th resistance R7；Second NPN type triode Q2
Emitter stage be grounded after the 6th resistance R6, the armature winding of transformer.
Optionally, with reference to shown in Fig. 8, filtration module adopts RC filter circuit, including the electric capacity C2 being connected in parallel and resistance
R8, RC filter circuit outputs voltage signal to AD conversion module 30.
In sum, the accumulator voltage detection means of the present invention is surveyed using the isolation that transformer carries out DC voltage
Amount, can patrol and examine measurement with relatively low cost, higher isolation and reliable realization to multipath accumulator, and utilize resistance
Capacitance network is realized voltage and is kept, and reduce further the impact to circuit-under-test for the measuring circuit, has ensured accuracy of detection.
Each technical characteristic of embodiment described above can arbitrarily be combined, for making description succinct, not to above-mentioned reality
The all possible combination of each technical characteristic applied in example is all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all it is considered to be the scope of this specification record.
Embodiment described above only have expressed the several embodiments of the present invention, and its description is more concrete and detailed, but simultaneously
Can not therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
Say, without departing from the inventive concept of the premise, some deformation can also be made and improve, these broadly fall into the protection of the present invention
Scope.Therefore, the protection domain of patent of the present invention should be defined by claims.
Claims (9)
1. a kind of accumulator voltage detection means is it is characterised in that include：Exciting current source module, transformer, diode,
Electric capacity, first resistor and second resistance；
Described exciting current source module output drive electric current is to the armature winding of described transformer；
One end of the secondary windings of described transformer is connected with the anode of described diode, the first end of the other end and described electric capacity
Connect, the second end of described electric capacity is connected with the negative electrode of described diode；
The first end of described electric capacity is connected with the negative pole of tested battery by described first resistor, and the second end of described electric capacity leads to
The positive pole crossing described second resistance with tested battery is connected.
2. accumulator voltage detection means according to claim 1 is it is characterised in that also include 3rd resistor, filtering
Module；
Described 3rd resistor and described filtration module are connected in series the rear armature winding with described transformer and are connected in parallel；Described change
The voltage at the armature winding two ends of depressor inputs described filtration module after described 3rd resistor partial pressure.
3. accumulator voltage detection means according to claim 2 is it is characterised in that also include AD conversion module and place
Reason module；
The input of described AD conversion module is connected with the output end of described filtration module, the output end of described AD conversion module with
The input of described processing module connects.
4. accumulator voltage detection means according to any one of claim 1 to 3 is it is characterised in that described excitation
Current source module includes the 4th resistance, the 5th resistance, the 6th resistance, amplification module and gate-controlled switch；
The input of described amplification module is connected with the first end of described 4th resistance, and output end passes sequentially through described 5th electricity
It is grounded after resistance, the armature winding of described gate-controlled switch, described 6th resistance and described transformer；The second of described 4th resistance
Hold external driving pulse.
5. accumulator voltage detection means according to claim 4 is it is characterised in that described amplification module includes first
NPN type triode；
The base stage of described first NPN type triode is connected with the first end of described 4th resistance, and colelctor electrode passes through described 5th electricity
Resistance is connected with described gate-controlled switch, grounded emitter.
6. accumulator voltage detection means according to claim 5 is it is characterised in that described gate-controlled switch includes the 7th
Resistance and the second NPN type triode；
The base stage of described second NPN type triode is connected by the colelctor electrode of described 5th resistance and described first NPN type triode
Connect；The colelctor electrode external voltage source of described second NPN type triode, and by described 7th resistance and described second NPN type three
The base stage of pole pipe connects；The emitter stage of described second NPN type triode by described 6th resistance, described transformer primary around
It is grounded after group.
7. the accumulator voltage detection means according to Claims 2 or 3 is it is characterised in that described filtration module is RC
Filter circuit.
8. accumulator voltage detection means according to claim 4 is it is characterised in that described gate-controlled switch is relay
Device.
9. accumulator voltage detection means according to claim 3 is it is characterised in that described processing module is MCU.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610715217.XA CN106405209B (en) | 2016-08-24 | 2016-08-24 | Accumulator voltage detection device |
| PCT/CN2016/101150 WO2018035931A1 (en) | 2016-08-24 | 2016-09-30 | Voltage detection device for battery terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610715217.XA CN106405209B (en) | 2016-08-24 | 2016-08-24 | Accumulator voltage detection device |
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| CN106405209A true CN106405209A (en) | 2017-02-15 |
| CN106405209B CN106405209B (en) | 2019-03-19 |
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| CN201610715217.XA Active CN106405209B (en) | 2016-08-24 | 2016-08-24 | Accumulator voltage detection device |
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| Country | Link |
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| CN (1) | CN106405209B (en) |
| WO (1) | WO2018035931A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109085409A (en) * | 2018-08-30 | 2018-12-25 | 广州市竣达智能软件技术有限公司 | A kind of DC voltage measuring device |
| CN114236226A (en) * | 2021-12-20 | 2022-03-25 | 上海瑞浦青创新能源有限公司 | Voltage measurement circuit |
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| CN110412344A (en) * | 2019-08-27 | 2019-11-05 | 珠海市声驰电器有限公司 | A voltage detection system |
| CN110865232B (en) * | 2019-12-11 | 2025-06-27 | 上海儒竞智控技术有限公司 | An isolated power grid voltage sampling device with temperature compensation and a sampling method |
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Also Published As
| Publication number | Publication date |
|---|---|
| WO2018035931A1 (en) | 2018-03-01 |
| CN106405209B (en) | 2019-03-19 |
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