CN106405209B - Accumulator voltage detection device - Google Patents
Accumulator voltage detection device Download PDFInfo
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- CN106405209B CN106405209B CN201610715217.XA CN201610715217A CN106405209B CN 106405209 B CN106405209 B CN 106405209B CN 201610715217 A CN201610715217 A CN 201610715217A CN 106405209 B CN106405209 B CN 106405209B
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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
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- Measurement Of Current Or Voltage (AREA)
Abstract
The present invention relates to a kind of accumulator voltage detection devices, comprising: exciting current source module, transformer, diode, capacitor, first resistor and second resistance；Armature winding of the exciting current source module output drive electric current to the transformer；One end of the secondary windings of the transformer is connect with the anode of the diode, and the other end is connect with the first end of the capacitor, and the second end of the capacitor is connect with the cathode of the diode；The first end of the capacitor is connect by the first resistor with the cathode of tested battery, and the second end of the capacitor is connect by the second resistance with the anode of tested battery.The present invention realizes the isolation measurement of accumulator voltage by transformer, at low cost, circuit structure is simple, and isolation Level and reliability are higher.
Description
Technical field
The present invention relates to accumulator checking technical fields, more particularly to a kind of accumulator voltage detection device.
Background technique
Battery often will appear in long-time use process holds voltage uneven, influences communication security.Therefore, to storage
Battery implements terminal voltage detecting and is of great significance.Currently used accumulator voltage detection device has following several:
(1) the accumulator voltage detection device based on relay switching
Referring to Fig.1 shown in, by driving relay C1 to Cn in turn, using relay contact will be tested battery list
Body accesses a shared signal sampling circuit, and other battery both ends are hanging, realizes and stores to each of battery group
The shortcomings that end voltage of battery cell is sampled, this method is that the movement speed of relay is slow, and there are finite number of time
Mechanical life and biggish action noise.
(2) based on the accumulator voltage detection device of serial analog-to-digital conversion
Referring to shown in Fig. 2, the number that accumulator voltage is converted into serial form is believed using serial analog-digital converter ADC
Number, serial data bus is transferred to by digital light-coupled isolation, is read back the cell voltage of each data channel by DSP.This side
The shortcomings that method is to need independent accessory power supply per serial ADC all the way, and signal conditioning circuit, digital signal isolation structure are more multiple
It is miscellaneous, and the high expensive of serial analog-digital converter ADC.
(3) the accumulator voltage detection device based on linear optical coupling or digital optocoupler compensation
Referring to shown in Fig. 3, it can realize that the accumulator voltage of isolation detects using linear optical coupling, but cost is excessively high.?
Digital optocoupler additional compensation circuit substitution can be used, but be the line of input and output the shortcomings that digital optocoupler for analog signal
Property it is poor, and be affected by temperature larger, need the temperature drift to digital optocoupler to be corrected with non-linear and compensate, electricity
Line structure is more complicated.
(4) the accumulator voltage detection device based on resistor network
Referring to shown in Fig. 4, potential-divider network is constituted using resistance, each battery tie point voltage of entire battery group
Decay to electronic analog swtich acceptable degree.The circuit structure is simple, but the circuit measuring circuit and battery return
Road is not isolated, and there are security risks, and is carried out gradient decaying using network resistor and be will cause successively decreasing for sampling precision.
In conclusion accumulator voltage detection device in traditional technology there is at high cost, circuit structure is complicated, every
The problems such as low, reliability is low from grade.
Summary of the invention
Based on this, to solve the problems of the prior art, the present invention provides a kind of accumulator voltage detection device, passes through
Transformer realizes the isolation measurement of accumulator voltage, at low cost, circuit structure is simple, and isolation Level and reliability compared with
It is high.
To realize the above-mentioned technical purpose, the embodiment of the present invention uses following technical scheme:
A kind of accumulator voltage detection device, comprising: exciting current source module, transformer, diode, capacitor, first
Resistance and second resistance；
Armature winding of the exciting current source module output drive electric current to the transformer；
One end of the secondary windings of the transformer is connect with the anode of the diode, and the of the other end and the capacitor
One end connection, the second end of the capacitor are connect with the cathode of the diode；
The first end of the capacitor is connect by the first resistor with the cathode of tested battery, and the second of the capacitor
End is connect by the second resistance with the anode of tested battery.
Accumulator voltage detection device of the invention realizes accumulator voltage by applying exciting current to transformer
Detection, and transformer have highly developed processing technology, it is easy to realize high-grade isolation.Transformer is static-magnetic
Sensing element is not present mechanical action, therefore has lasting reliability.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, accumulator terminal of the invention
Voltage check device can measure the inspection of multipath accumulator with lower cost, higher isolation and reliable realization, and
And realize that voltage is kept using resistance-capacitance network, influence of the measuring circuit to circuit-under-test is further decreased, has ensured inspection
Survey precision.
Detailed description of the invention
Fig. 1 is the electrical block diagram of the accumulator voltage detection device switched based on relay；
Fig. 2 is the electrical block diagram of the accumulator voltage detection device based on serial analog-to-digital conversion；
Fig. 3 is the circuit structure signal of the accumulator voltage detection device based on linear optical coupling or digital optocoupler compensation
Figure；
Fig. 4 is the electrical block diagram of the accumulator voltage detection device based on resistor network；
Fig. 5 is a kind of optional electrical block diagram of accumulator voltage detection device of the invention；
Fig. 6 is another optional electrical block diagram of accumulator voltage detection device of the invention；
Fig. 7 is the structural schematic diagram of exciting current source module in the embodiment of the present invention；
Fig. 8 is another optional electrical block diagram of accumulator voltage detection device of the invention.
Specific embodiment
The contents of the present invention are described in further detail below in conjunction with preferred embodiment and attached drawing.Obviously, hereafter institute
The examples are only for explaining the invention for description, rather than limitation of the invention.Based on the embodiments of the present invention, this field is general
Logical technical staff every other embodiment obtained without making creative work belongs to what the present invention protected
Range.It should be understood that although hereinafter describing various information using term " first ", " second " etc., these letters
Breath should not necessarily be limited by these terms, these terms are only used to for same type of information being distinguished from each other out.For example, not departing from this hair
In the case where bright range, " first " information can also be referred to as " second " information, and similar, " second " information can also be referred to as
" first " information.It also should be noted that only the parts related to the present invention are shown for ease of description, in attached drawing and
Not all content.
Fig. 5 is the schematic illustration of accumulator voltage detection device of the invention in one embodiment, such as Fig. 5 institute
Show, the accumulator voltage detection device 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, at the beginning of 10 output drive electric current of exciting current source module to transformer T
Grade winding.One end of the secondary windings of transformer T is connect with the anode of diode D1, and the first end a of the other end and capacitor C1 connect
It connects, the second end b of capacitor C2 is connect with the cathode of diode D1.
As shown in figure 5, the first end a of capacitor C1 is connect by first resistor R1 with the cathode of tested battery 100, capacitor
The second end b of C1 is connect by second resistance R2 with the anode of tested battery 100.
By the accumulator voltage detection device in the present embodiment with after tested battery 100, tested battery 100 passes through
First resistor R1, second resistance R2 charge to capacitor C1, after charging reaches balance, the voltage and tested battery at the both ends capacitor C1
100 end voltage UxIt is equal.
Since 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, passes through two poles block 10 by transformer T
Pipe D1 charges to capacitor C1.
When the induced voltage that transformer T2 secondary windings generates is lower than the voltage U at the both ends capacitor C1xWhen, it is in diode D1
There is no electric current to pass through, exciting current source module 10 is to after the armature winding output drive electric current of transformer T, T2 grade of transformer
The voltage rapid increase of winding will charge to capacitor C1 by diode D2, and the voltage at the both ends capacitor C1 is from UxRise to Ux0, when
After excitation-off, capacitor C1 discharges to tested battery 100, and capacitor C1 both end voltage is restored to Ux.Electromagnetism based on transformer
Inductively principle, in the whole process, the armature winding of transformer T will also generate one and capacitor C1 both end voltage is in line
The variation voltage of sex ratio relationship, it may be assumed that as the voltage at the both ends capacitor C1 is by UxRise to Ux0, the armature winding electricity of transformer T
Pressure is also by synchronous from UNRise to UN0, and UN/Ux=UN0/Ux0As long as therefore find out linear scale factor, detection can be passed through
The variation voltage of transformer T armature winding realizes the detection of tested 100 end voltage of battery.
Therefore, when detecting the end voltage of battery using the accumulator voltage detection device in the present embodiment, first
Accumulator voltage detection device is calibrated, i.e., will be tested battery 100 in Fig. 5 and replace with a known voltage source
U0, then by the armature winding of 10 output drive electric current of exciting current source module to transformer T, at the beginning of detecting transformer T at this time
The variation voltage that grade winding generates, passes through the variation voltage and U0Calculate linear scale factor k.To tested battery 100
End voltage when being detected, by the armature winding of 10 output drive electric current of exciting current source module to transformer T, and detect
The variation voltage that transformer T armature winding generates is detected, tested battery can be calculated then in conjunction with linear scale factor k
100 end voltage.
Accumulator voltage detection device 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 are mechanical actions, therefore have 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 detection accuracy, referring now still to the accumulator voltage detection shown in Fig. 5, in the present embodiment
Device further includes 3rd resistor R3, filter module 20.3rd resistor R3 and filter module 20 are first with transformer T after being connected in series
Grade winding parallel connection.The voltage at the armature winding both ends of transformer T is input to filtering mould after 3rd resistor R3 partial pressure in this way
Block 20, as long as the voltage that then detection filter module 20 exports calculates the end voltage of tested battery 100.
Preferably, for automatic output test result, referring to shown in Fig. 6, and the storage together referring to Fig. 5, in the present embodiment
Battery terminal voltage detection device may also include AD conversion module 30 and processing module 40, wherein processing module 40 can be used MCU,
The devices such as CPU, FPGA.The input terminal of AD conversion module 30 is connect with the output end of filter module 20, AD conversion module 30 it is defeated
Outlet is connect with the input terminal of processing module 40.AD conversion module 30 carries out modulus to the voltage signal that filter module 20 exports and turns
It changes, generates digital signal, and digital signal is sent into processing module 40.Referring to above for the description of calibration process, calibrating
When, digital signal and known voltage source U that processing module 40 is inputted according to AD conversion module 300Processing calculating is carried out, just
It can determine that linear scale factor k, then when the end voltage to tested battery 100 detects, processing module 40 is according to AD
The digital signal and linear scale factor k of conversion module input can calculate the end voltage of tested battery 100 automatically, and
Export calculated result.
In a kind of optional embodiment, referring to shown in Fig. 7, exciting current source module 10 includes the 4th resistance R4, the
Five resistance R5, the 6th resistance R6, amplification module 101 and controllable switch 102.Wherein, the input terminal of amplification module 101 and the 4th
The first end c connection of resistance R4, output end pass sequentially through the 5th resistance R5, controllable 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 4th resistance R4.As shown in fig. 7, controllable switch 102 is connected
Afterwards, apply driving pulse at the 4th resistance R4, pass through the 5th resistance R5 and the 6th resistance R6 again after the amplification of amplification module 101
Metering function, can to the armature winding of transformer T apply exciting current.Wherein, various amplification electricity can be selected in amplification module 101
Road or amplifying device, optionally, referring 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 connect with the first end c of the 4th resistance R4, and collector is connect by the 5th resistance R5 with controllable switch 102,
Emitter ground connection.
All kinds of controllable switching devices, such as relay, MOSFET, IGBT etc. can be used in controllable switch 102.It is optional
, referring to shown in Fig. 8, controllable switch 102 includes the 7th resistance R7 and the second NPN type triode Q2.Second NPN type triode Q2
Base stage connect with the collector of the first NPN type triode Q1 by the 5th resistance R5；The collector of second NPN type triode Q2
External voltage source VDD, and connect by the 7th resistance R7 with the base stage of the second NPN type triode Q2；Second NPN type triode Q2
Emitter by the 6th resistance R6, transformer armature winding after be grounded.
Optionally, referring to shown in Fig. 8, filter module uses RC filter circuit, including the capacitor C2 being connected in parallel and resistance
R8, RC filter circuit output voltage signal to AD conversion module 30.
In conclusion accumulator voltage detection device of the invention is surveyed using the isolation that transformer carries out DC voltage
Amount can measure the inspection of multipath accumulator with lower cost, higher isolation and reliable realization, and utilize resistance
Capacitance network realizes that voltage is kept, and further reduced influence of the measuring circuit to circuit-under-test, has ensured detection accuracy.
Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all should be considered as described in this specification.
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously
It cannot 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
It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to protection of the invention
Range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (6)
1. a kind of accumulator voltage detection device characterized by comprising exciting current source module, transformer, diode,
Capacitor, first resistor and second resistance；
Armature winding of the exciting current source module output drive electric current to the transformer；
One end of the secondary windings of the transformer is connect with the anode of the diode, the first end of the other end and the capacitor
Connection, the second end of the capacitor are connect with the cathode of the diode；
The first end of the capacitor is connect by the first resistor with the cathode of tested battery, and the second end of the capacitor is logical
The second resistance is crossed to connect with the anode of tested battery；
When the end voltage of accumulator voltage detection device detection battery, tested battery one has been replaced with first
The voltage source known detects the armature winding by the exciting current source module output drive electric current to the armature winding
The variation voltage of generation by the variation voltage and calculates linear scale factor；It is carried out in the end voltage to tested battery
When detection, by the exciting current source module output drive electric current to the armature winding, and detects the armature winding and produce
Raw variation voltage calculates the end voltage of tested battery in conjunction with linear scale factor；
The exciting current source module includes the 4th resistance, the 5th resistance, the 6th resistance, amplification module and controllable switch；
The input terminal of the amplification module is connect with the first end of the 4th resistance, and output end passes sequentially through the 5th electricity
It is grounded after the armature winding of resistance, the controllable switch, the 6th resistance and the transformer；The second of 4th resistance
Hold external driving pulse；
It further include 3rd resistor, filter module；
It is connected in parallel after the 3rd resistor and filter module series connection with the armature winding of the transformer；The change
The voltage at the armature winding both ends of depressor inputs the filter module after 3rd resistor partial pressure；
The filter module is RC filter circuit, and the RC filter circuit includes the capacitor C2 and resistance R8 being connected in parallel.
2. accumulator voltage detection device according to claim 1, which is characterized in that further include AD conversion module and place
Manage module；
The input terminal of the AD conversion module is connect with the output end of the filter module, the output end of the AD conversion module with
The input terminal of the processing module connects.
3. accumulator voltage detection device according to claim 1, which is characterized in that the amplification module includes first
NPN type triode；
The base stage of first NPN type triode is connect with the first end of the 4th resistance, and collector passes through the 5th electricity
Resistance is connect with the controllable switch, emitter ground connection.
4. accumulator voltage detection device according to claim 3, which is characterized in that the controllable switch includes the 7th
Resistance and the second NPN type triode；
The base stage of second NPN type triode is connected by the 5th resistance and the collector of first NPN type triode
It connects；The collector external voltage source of second NPN type triode, and pass through the 7th resistance and second NPN type three
The base stage of pole pipe connects；The emitter of second NPN type triode by the 6th resistance, the transformer it is primary around
It is grounded after group.
5. accumulator voltage detection device according to claim 1, which is characterized in that the controllable switch is relay
Device.
6. accumulator voltage detection device according to claim 2, which is characterized in that the 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 CN106405209A (en) | 2017-02-15 |
| CN106405209B true 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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| WO (1) | WO2018035931A1 (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109085409B (en) * | 2018-08-30 | 2024-06-07 | 广州市竣达智能软件技术有限公司 | Direct-current voltage measuring device |
| CN110412344A (en) * | 2019-08-27 | 2019-11-05 | 珠海市声驰电器有限公司 | A kind of voltage detecting system |
| CN111650506A (en) * | 2020-06-27 | 2020-09-11 | 德尔福科技(苏州)有限公司 | High-voltage relay adhesion detection system |
| CN114089076A (en) * | 2021-11-29 | 2022-02-25 | 国网北京市电力公司 | Power battery's analog circuit |
| CN114236226B (en) * | 2021-12-20 | 2023-07-07 | 上海瑞浦青创新能源有限公司 | Voltage measuring circuit |
| CN115561489A (en) * | 2022-09-29 | 2023-01-03 | 中汽创智科技有限公司 | Electric pile inspection device |
| CN117269851B (en) * | 2023-11-16 | 2024-02-09 | 江苏兴缘高温线缆有限公司 | Terminal grafting detection device |
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| CN101371146A (en) * | 2006-01-12 | 2009-02-18 | 日产自动车株式会社 | Voltage detection device and voltage detection method |
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| WO2018035931A1 (en) | 2018-03-01 |
| CN106405209A (en) | 2017-02-15 |
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Address after: Room 902-7 and 902-8, No. 9, caipin Road, Huangpu District, Guangzhou City, Guangdong Province Patentee after: Guangzhou Junda Intelligent Software Technology Co., Ltd. Address before: 510000 902G, 902H, No. 9, color road, Guangzhou hi tech Industrial Development Zone, Guangzhou, Guangdong Patentee before: Guangzhou Junda Intelligent Software Technology Co., Ltd. |