CN2226310Y - Voltage signal acquisition apparatus for testing electric parameter of accumulator - Google Patents
Voltage signal acquisition apparatus for testing electric parameter of accumulator Download PDFInfo
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- CN2226310Y CN2226310Y CN 94232070 CN94232070U CN2226310Y CN 2226310 Y CN2226310 Y CN 2226310Y CN 94232070 CN94232070 CN 94232070 CN 94232070 U CN94232070 U CN 94232070U CN 2226310 Y CN2226310 Y CN 2226310Y
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Abstract
The utility model relates to a voltage signal acquisition apparatus for testing electric parameters of an accumulator group, which comprises a circuit for acquiring the voltage of each accumulator in a serial accumulator group. The circuit is composed of a resistance attenuator, multi-way selection analog switches, a differential amplifier and an A/D converting circuit, wherein, the resistance attenuator transmits respectively the electric potential signals of the positive and the negative ends of each measured accumulator to corresponding analog switches and then to the input end of the differential amplifier connected with an A/D converter. The utility model has the advantage that the voltage signal acquisition apparatus can quickly, accurately and circularly acquire the voltage value of each accumulator to ensure the testing requirement of each electric parameter of the accumulator group under dynamic and static states.
Description
The utility model relates to a kind of voltage signal acquisition device that detects the battery pack electrical quantity.
In power industry, military first-class many fields, often to use and connect as DC power-supply system by tens joints and even hundreds of joint large-capacity battery.This DC power-supply system be in operation and safeguard in to often detect electrical quantitys such as its voltage, electric current, capacity.
The domestic detecting instrument that has is to adopt stepper motor or relay to realize each batteries is switched at present, and itself and metering circuit are connected, and detects its magnitude of voltage.This detecting instrument has it obviously not enough: 1, acquired signal speed is slow, makes the time of measuring every batteries voltage on 1 second-time; 2,,, be easy to cause short circuit mutually between battery, have a strong impact on battery life because relay actuation time, consistance was poor if switch collection with relay; 3, can not directly detect battery capacity parameters.The problem of most critical is: this instrument can only be measured battery voltage, current value of (static state) in normal loaded work piece process.And the good and bad and whole quality for the electric battery duty of performance, the quality of wanting really to judge effectively every batteries, should record its parametric line under dynamically, promptly should be in shock duration Δ T, touring several times record each running parameter of whole battery group and the magnitude of voltage of every batteries under impact load.The core technology that solves detection of dynamic is to gather every batteries voltage signal fast, and the sample circuit of detecting instrument of the prior art can't address this problem.
In order to realize to adopt computer technology, to set up an intelligent rapid detection system its detection of dynamic again the accumulator Static Detection of work.The utility model purpose is: overcome the deficiency of prior art, a kind of battery tension signal picker for this rapid detection system configuration is provided.
The utility model is achieved in that it comprises Acquisition Circuit to each batteries voltage in the electric battery of connecting, and this circuit selects analog switch, differential amplifier and A/D change-over circuit to form by resistance attenuator, multichannel: 1, the resistance attenuator voltage divider of being drawn over the ground by the positive and negative end of every batteries is formed; 2, electric battery is divided into the identical group of some joint numbers, battery joint number in corresponding two analog switches of every group, the group is less than the fan-in factor of analog switch, except that the first input end of the branch pressure side of first segment battery anode voltage divider and first analog switch joined separately, with the corresponding input end of first analog switch and a last input end of second analog switch joined all successively by the while for the pressure side of minuteing of the voltage divider of voltage divider of putting between each batteries in the group and minor details battery negative terminal; 3, corresponding differential amplifier of every group battery, the output terminal of two analog switches of this group join with two input ends of differential amplifier respectively; 4, the differential amplifier output terminal of each group's battery correspondence all joins with the A/D change-over circuit.
When realizing the utility model, electric battery can be divided into identical big group of a plurality of joint numbers, each big group corresponding differential amplifier, the first segment battery anode of this group, minor details battery negative terminal join with two input ends of a differential amplifier respectively, and differential amplifier output terminal and A/D change-over circuit join.
When realizing the utility model with above-mentioned basic scheme, the output signal of two analog switches that can design every group battery correspondence is delivered to corresponding differential amplifier input end more respectively through separately follower.The output signal of each differential amplifier also the in-phase amplifier by separately, deliver to the A/D change-over circuit again.
Advantage of the present utility model is:
1, adopted electron device switching, acquired signal, thus can go the rounds to gather the magnitude of voltage of every batteries in the electric battery quickly and accurately, to guarantee that detection system is to dynamic, the static detection needs of each electrical quantity down in the electric battery entire work process.
2, circuit design is reasonable, make to the total voltage value up to the electric battery of hundreds of volts can adopt still that only to allow input voltage be tens volts integrated circuit (IC) chip, to finish the function of quick switching, collection.
Fig. 1 is for comprising intelligent checking system structured flowchart of the present utility model.
Fig. 2 is the Acquisition Circuit schematic diagram of the tested battery of the utility model corresponding one big group.
The cell voltage change curve that Fig. 3 draws in the data of dynamically gathering down for the utility model.
Fig. 4 gathers the circuit theory diagrams of assembled battery total voltage for the utility model.
Below in conjunction with drawings and Examples the utility model is done further narration:
In the present embodiment, tested electric battery is in series by the accumulator of 180 joint 1.8V.
Computer intelligence detection system shown in Figure 1 comprises the two large divisions, electrical signal collection and digital processing, its major function is: to electric battery in whole charge or discharge process, particularly under impact load (dynamically), measure the terminal voltage of every batteries and the electrical quantitys such as total voltage of whole Battery pack, and print time dependent data of cell voltage and curve in the entire work process.Definition in this impact load (dynamically) is: electric battery provides heavy-current discharge to load starting moment, and its duration is Δ T=100ms.And the detection of addressing in this example carrying out under the impact load (dynamically) refers to: in impact load duration Δ T, the total voltage of 180 batteries, the terminal voltage of each batteries are finished 20 secondary data collections, measurement, and draw out curve as shown in Figure 3.V among Fig. 3 is the stable DC magnitude of voltage that electric battery is provided when entering normal operation, just to the static state collection of electric battery, the data and curves of measurement.Start load moment being coupled with, battery will produce heavy-current discharge, and owing to the existence of internal resistance, battery will inevitably produce drop-off voltage difference Δ V shown in Figure 3 in heavy-current discharge, and detection of dynamic will be drawn out exactly at shock duration Δ T=T
2-T
1The amplitude of magnitude of voltage rise trend, speed and the Δ V of interior battery, this family curve will reflect quality, performance, the life-span of every batteries truer than Static Detection curve, all sidedly, this can allow the user in time pinpoint the problems, in time change corresponding battery, can guarantee that the user neither can influence the operate as normal of electric power system, need not to pay the economic cost of blindly changing whole Battery pack again.
Realize detection of dynamic, core is the collection of electric signal; And to finish the dynamic acquisition task, solve following several problem with regard to need: 1, in Δ T=100ms, 180 batteries are gathered 20 secondary data by joint, promptly will possess each picking rate≤25 μ s to every batteries; 2, the assembled battery total voltage of 180 joints, 1.8V reaches 320V, and the input voltage that existing multichannel selects the analog switch chip to allow has only tens volts, can't directly use; 3, to solve at a high speed to high potential signal collection and the problem of forcing down production cost.Can illustrate by following embodiment the utility model is how to give comprehensive, the reasonable solution to these problems.
In this example, 180 batteries are divided into four big groups, are divided into three groups in every big group, every group comprises 15 batteries, selects for use 16 to select 1 analog switch 4067, adopts four 0809 chips to make synchronous A/D change-over circuit.
Fig. 2 has showed the Acquisition Circuit to a big Battery pack.Be to adapt to analog switch CD4067 and allow the requirement of input voltage below 18V, with the input again behind the resistance decrement of going ahead of the rest of every batteries terminal voltage; Corresponding two CD4067 of every group 15 batteries; When the state of sending gating signal ABCD as the CPU of detection system is 000H, all INO passage conductings of CD4067, this moment, the positive and negative terminal potential signal of the 15th, 30,45,60,75,90,105,120,135,150,165,180 batteries was promptly delivered to corresponding two input ends of differential amplifier Fi simultaneously; When the ABCD state is 001H, IN then
1The passage conducting, this moment, the voltage signal of the 14th, 29,44,59,74,89,104,119,134,149,164,179 batteries was sent among the corresponding differential amplifier Fi simultaneously; So gating work is gone down, and is 1110H until the ABCD state, and then 180 batteries voltage signals will all transmit.Hence one can see that, and the dynamic acquisition signal in this example is in Δ T=100ms, carries out altogether 15 times, gathers 12 batteries simultaneously at every turn and finish.Between tested battery and differential amplifier, adopt analog switch and follower circuit, from still being equivalent to directly to be connected to every batteries the Acquisition Circuit in logic, but its actual serviceability has been optimized greatly: they can filter out the sampled signal deviation of bringing because of resistance attenuator resistance deviation, can make that differential amplifier input end common mode voltage is very little, eliminate between battery and influence each other, help improving measuring accuracy, make debugging, production become simple.
Selected for use 0809 lower chip of cost to make the A/D change-over circuit in example, its slewing rate is 80 μ S, adopts four 0809 respectively as each A/D change-over circuit of big group, so just can four groups changes synchronously, makes the actual 20 μ s that become of A/D slewing rate.
Differential amplifier F among Fig. 1
1Be what to finish the acquisition tasks of a big group total voltage, and the acquisition principle of entire cell total voltage is as shown in Figure 4, can analyze from Fig. 4: the current potential V of symmetric points C to output terminal ground
3=0, so the head of the electric battery of 320V, terminal current potential are ± 160V, can add any holding circuit like this and directly deliver to the input end of differential amplifier and operate as normal.This circuit theory among Fig. 4 also can be used for detecting electric battery total current, control busbar voltage.Also it can be combined, constitutes jointly the voltage collection circuit to the electric battery of more joint number with circuit shown in Figure 2, promptly adopt Fig. 4 circuit, adopt circuit among Fig. 2 for the cell voltage collection than electronegative potential in the electric battery for the cell voltage collection of noble potential in the electric battery.
Claims (6)
1, detects the voltage signal acquisition device of battery pack electrical quantity, it is characterized in that: comprise Acquisition Circuit each batteries voltage in the electric battery that is being connected in series, this circuit selects analog switch, differential amplifier and A/D change-over circuit to form by resistance attenuator, multichannel
(1) the resistance attenuator voltage divider of being drawn over the ground by the positive and negative end of every batteries is formed,
(2) battery pack is divided into the identical group of some joint numbers; Corresponding two multichannels of every group select the battery number in analog switch, the group to be less than the fan-in of analog switch; Except the first input end of the branch pressure side of first segment battery anode divider and first analog switch joins separately; Minute pressure side of the divider of the divider of putting between each batteries in the group and most end batteries negative terminal is joined with the corresponding input of first analog switch and a upper input of second analog switch all successively simultaneously
(3) corresponding differential amplifier of every group battery, the output terminal of two analog switches of this grade join with two input ends of differential amplifier respectively,
(4) the differential amplifier output terminal of each group's battery correspondence all joins with the A/D change-over circuit.
2, voltage signal acquisition device according to claim 1, it is characterized in that: electric battery is divided into identical big group of a plurality of joint numbers, each big group corresponding differential amplifier, the first segment battery anode of this group, minor details battery negative terminal join with two input ends of a differential amplifier respectively, and differential amplifier output terminal and A/D change-over circuit join.
3, voltage signal acquisition device according to claim 1 is characterized in that: the output signal of two analog switches of every group battery correspondence respectively through separately follower, deliver to corresponding differential amplifier input end.
4, voltage signal acquisition device according to claim 1 and 2 is characterized in that: the in-phase amplifier of each differential amplifier output signal by separately, deliver to the A/D change-over circuit.
5, voltage signal acquisition device according to claim 2, it is characterized in that: the battery pack to 180 joints is divided into four big groups, be divided into three groups in every big group, every group comprises 15 batteries, select for use 16 to select 1 analog switch 4067, adopt four 0809 chips to make each synchronous A/D change-over circuit of big group respectively.
6, voltage signal acquisition device according to claim 1 is characterized in that: to the noble potential cell voltage Acquisition Circuit in the tested electric battery, be that every batteries two ends electric potential signal is directly delivered to corresponding two input ends of differential amplifier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94232070 CN2226310Y (en) | 1994-12-26 | 1994-12-26 | Voltage signal acquisition apparatus for testing electric parameter of accumulator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94232070 CN2226310Y (en) | 1994-12-26 | 1994-12-26 | Voltage signal acquisition apparatus for testing electric parameter of accumulator |
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| Publication Number | Publication Date |
|---|---|
| CN2226310Y true CN2226310Y (en) | 1996-05-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 94232070 Expired - Fee Related CN2226310Y (en) | 1994-12-26 | 1994-12-26 | Voltage signal acquisition apparatus for testing electric parameter of accumulator |
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| Country | Link |
|---|---|
| CN (1) | CN2226310Y (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100350261C (en) * | 2001-05-29 | 2007-11-21 | 水吉能公司 | Fuel cell votage monitoring system and its method |
| CN100408977C (en) * | 2005-02-22 | 2008-08-06 | 艾默生网络能源系统有限公司 | Multi-mode acquisition circuit |
| CN101187676B (en) * | 2007-12-11 | 2010-06-16 | 中国科学院长春光学精密机械与物理研究所 | Selection circuit of multi-path input and double-path output |
| CN101231318B (en) * | 2007-07-31 | 2012-01-25 | 艾默生网络能源有限公司 | Voltage sampling circuit of anti-syntype diverter |
| CN103675432A (en) * | 2013-12-11 | 2014-03-26 | 重庆川仪自动化股份有限公司 | Signal amplitude converting system applied to paper recorder |
| CN103812461A (en) * | 2014-01-24 | 2014-05-21 | 苏州融达兴电气有限公司 | Signal sampling circuit structure |
| CN105526952A (en) * | 2014-09-28 | 2016-04-27 | 沈阳中科奥维科技股份有限公司 | Low-power wireless meter realizing device and realizing method |
| CN105866694A (en) * | 2016-04-12 | 2016-08-17 | 洛阳鑫光锂电科技有限公司 | Power lithium battery series voltage detector |
| CN107643491A (en) * | 2016-07-21 | 2018-01-30 | 矢崎总业株式会社 | Battery monitor system |
| CN109991550A (en) * | 2017-12-28 | 2019-07-09 | 中国电信股份有限公司 | Condition detecting of storage-battery, device, system and computer readable storage medium |
| CN113419105A (en) * | 2021-07-22 | 2021-09-21 | 苏州恩智测控技术有限公司 | Multi-channel high-precision voltage rapid acquisition circuit and method |
-
1994
- 1994-12-26 CN CN 94232070 patent/CN2226310Y/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100350261C (en) * | 2001-05-29 | 2007-11-21 | 水吉能公司 | Fuel cell votage monitoring system and its method |
| CN100408977C (en) * | 2005-02-22 | 2008-08-06 | 艾默生网络能源系统有限公司 | Multi-mode acquisition circuit |
| CN101231318B (en) * | 2007-07-31 | 2012-01-25 | 艾默生网络能源有限公司 | Voltage sampling circuit of anti-syntype diverter |
| CN101187676B (en) * | 2007-12-11 | 2010-06-16 | 中国科学院长春光学精密机械与物理研究所 | Selection circuit of multi-path input and double-path output |
| CN103675432A (en) * | 2013-12-11 | 2014-03-26 | 重庆川仪自动化股份有限公司 | Signal amplitude converting system applied to paper recorder |
| CN103675432B (en) * | 2013-12-11 | 2016-11-23 | 重庆川仪自动化股份有限公司 | It is applied to the signal amplitude converting system of paper recorder |
| CN103812461A (en) * | 2014-01-24 | 2014-05-21 | 苏州融达兴电气有限公司 | Signal sampling circuit structure |
| CN105526952A (en) * | 2014-09-28 | 2016-04-27 | 沈阳中科奥维科技股份有限公司 | Low-power wireless meter realizing device and realizing method |
| CN105866694A (en) * | 2016-04-12 | 2016-08-17 | 洛阳鑫光锂电科技有限公司 | Power lithium battery series voltage detector |
| CN107643491A (en) * | 2016-07-21 | 2018-01-30 | 矢崎总业株式会社 | Battery monitor system |
| CN109991550A (en) * | 2017-12-28 | 2019-07-09 | 中国电信股份有限公司 | Condition detecting of storage-battery, device, system and computer readable storage medium |
| CN113419105A (en) * | 2021-07-22 | 2021-09-21 | 苏州恩智测控技术有限公司 | Multi-channel high-precision voltage rapid acquisition circuit and method |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |