CN206479620U - Accumulator failure early-warning apparatus - Google Patents
Accumulator failure early-warning apparatus Download PDFInfo
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- CN206479620U CN206479620U CN201621460330.XU CN201621460330U CN206479620U CN 206479620 U CN206479620 U CN 206479620U CN 201621460330 U CN201621460330 U CN 201621460330U CN 206479620 U CN206479620 U CN 206479620U
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- circuit
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- central processing
- warning apparatus
- excitation drive
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Abstract
The utility model discloses a kind of accumulator failure early-warning apparatus, the SPWM control circuits and voltage sampling circuit being connected including central processing unit and with central processing unit, also include excitation drive circuit, the excited target end of the excitation drive circuit controls circuit and signal generator to be connected with SPWM respectively, the output loop of the excitation drive circuit is sequentially connected in series calibrating resistance and disconnect switch and is connected with the negative pole of mesuring battary group, the input circuit of the exciting circuit is connected by disconnect switch and the positive pole of mesuring battary group respectively, the voltage sample end of the voltage sampling circuit is connected with the two ends of calibrating resistance and the two poles of the earth of mesuring battary group respectively.
Description
Technical field
The utility model is related to a kind of accumulator failure early-warning apparatus, belongs to test and measuring technical field.
Background technology
Battery is widely used in the row such as electric power, communication, Aero-Space, finance as the most frequently used energy-storage travelling wave tube
Industry, it is true as the back-up source at numerous occasions such as government department, communal facility, large-scale processing enterprise and Various types of data center
Electric power needed for being provided when having a power failure electrical equipment is protected, its importance is self-evident.Usually battery is standby in floating charging
State, is powered from the rectified device transform of electric main into direct current to load, under alternating current dead electricity or other accident state, is stored
Battery is the unique energy source provider of load, once going wrong, electric power system will face paralysis, causes equipment to stop transport or other
Great interruption of service.So, real-time monitoring and fault pre-alarming to battery become particularly important.
At present, the most ice storing time of in the market or detection instrument are only able to detect the voltage of battery, electric current；Have
Some products that can detect accumulator internal resistance can not accomplish to continue to monitor or real-time monitoring system cost is too high.
Utility model content
Utility model purpose：Technical problem to be solved in the utility model is to provide a kind of accumulator failure early-warning apparatus,
The accumulator failure early-warning apparatus can be obtained by sampling the voltage at battery two ends to be measured and the voltage at calibrating resistance two ends
The internal resistance of battery to be measured.
Utility model content：In order to solve the above technical problems, the technological means that is used of the utility model for：
Accumulator failure early-warning apparatus, including central processing unit and the SPWM control circuits and electricity that are connected with central processing unit
Press sample circuit, in addition to excitation drive circuit, the excited target end of the excitation drive circuit controlled respectively with SPWM circuit and
Signal generator connect, it is described excitation drive circuit output loop be sequentially connected in series calibrating resistance and disconnect switch and with it is to be measured
The negative pole connection of battery pack, the input circuit of the exciting circuit is connected by disconnect switch and the positive pole of mesuring battary group respectively
Connect, the voltage sample end of the voltage sampling circuit is connected with the two ends of calibrating resistance and the two poles of the earth of mesuring battary group respectively.
Wherein, RC filter circuits and inductive magnetic loop circuit are also in series with the excitation drive circuit input circuit.
Wherein, the central processing unit is also associated with alarm display circuit and data storage service controller.
Wherein, the voltage sampling circuit includes voltage signal conditioning circuit and A/D converter circuit, the A/D converter circuit
Digital output end is connected by spi bus with central processing unit.
Wherein, the central processing unit is connected by the controlled end of ON-OFF control circuit and disconnect switch.
Compared to prior art, technical solutions of the utility model have the advantage that for：
The utility model accumulator failure early-warning apparatus can be tested the voltage and calibrating resistance two at battery two ends by measurement
The voltage at end, obtains accumulator internal resistance to be measured, the Frequency point while driving signal frequency can effectively avoid interference, and improves measurement essence
Degree；In addition, system adds inductive magnetic loop circuit and RC filter circuits, anti-interference during systematic survey can be effectively improved；
Finally, system measures the internal resistance of single battery module by disconnect switch respectively, and can make signal exciting circuit and measurement
Circuit function is multiplexed, and is effectively saved system cost and is improved the scalability of system.
Brief description of the drawings
Fig. 1 is the systematic schematic diagram of the utility model accumulator failure early-warning apparatus.
Embodiment
According to following embodiments, the utility model may be better understood.However, those skilled in the art easily manages
Solution, the content described by embodiment is merely to illustrate the utility model, without should also without limitation on institute in claims in detail
The utility model carefully described.
As shown in figure 1, this accumulator failure of the utility model early-warning apparatus can monitor the internal resistance feelings of two batteries simultaneously
Condition simultaneously carries out early warning, by extending measuring loop, can extend and be monitored early warning to more than two batteries.This practicality
New accumulator failure early warning instrument system includes central processing unit and SPWM be connected with central processing unit control circuit and
Voltage sampling circuit, in addition to excitation drive circuit, encourage the excited target end of drive circuit to control circuit and letter with SPWM respectively
Number generator connection, the output loop of excitation drive circuit has been sequentially connected in series calibrating resistance and disconnect switch I and and mesuring battary
The negative pole connection of group, the input circuit of exciting circuit is connected by disconnect switch II and the positive pole of mesuring battary group respectively, voltage
The voltage sample end of sample circuit is connected with the two ends of calibrating resistance and the two poles of the earth of mesuring battary group respectively.
Wherein, RC filter circuits and inductive magnetic loop circuit are in series with the excitation drive circuit input major loop in system,
Anti-interference during systematic survey can be effectively improved；Central processing unit is also associated with alarm display circuit and data storage service
Controller, central processing unit is calculated in now battery to be measured according to driving exciting current signal value and the voltage signal of sampling
Resistance is simultaneously done data after further amendment by data storage service controller to data progress stored record, while surveying
During amount results abnormity audible and visual alarm is carried out by alerting display circuit；Voltage sampling circuit includes voltage signal conditioning circuit and AD
Change-over circuit, voltage signal conditioning circuit is a low pass filter, and analog signalses are changed into digital quantity by A/D converter circuit
Signal, A/D converter circuit digital output end is connected by spi bus with central processing unit；The controlled end of disconnect switch respectively with
The digital output mouthful connection of central processing unit.
Internal resistance of the timesharing to battery S1 and S2 is measured and early warning when system works.Central processing unit is controlled by switching
Circuit processed controls the folding of disconnect switch, make signal drive circuit excitation drive input and output end be respectively attached to by
Survey the two ends of battery.
When measuring battery S1, disconnect switch 1-1 and 2-1 are in channel status, and disconnect switch 1-2 and 2-2 are in open circuit
State.The control pumping signal that central processing unit control SPWM control circuits produce corresponding frequencies makes excitation drive circuit produce phase
The driving current signal answered is attached on R1 and S1 composition measurement major loops.Voltage sampling circuit is sampled S1 and R1 two ends respectively
Data are simultaneously given central processing unit and handled by voltage.Central processing unit is according to driving exciting current signal value and the electricity of sampling
Pressure signal of change internal resistance value now on S1 is simultaneously done data after further amendment by data storage service controller logarithm
According to stored record is carried out, while carrying out audible and visual alarm by alerting display circuit when measurement result is abnormal.
When measuring battery S2, control 1-1 and 2-1 is in off state, and disconnect switch 1-2 and 2-2 are in open-circuit condition,
The control pumping signal that central processing unit control SPWM control circuits produce corresponding frequencies makes excitation drive circuit produce accordingly
Driving current signal is attached on R2 and S2 composition measurement major loops.Voltage sampling circuit is sampled the voltage at S2 and R2 two ends respectively
And give central processing unit by data and handled.Central processing unit is believed according to driving exciting current signal value and the voltage of sampling
Number calculate the internal resistance value now on S2 and data are entered by data storage service controller after data are done into further amendment
Row stored record, while carrying out audible and visual alarm by alerting display circuit when measurement result is abnormal.
When system halt works, all disconnect switchs are in open-circuit condition, reduce measuring system to battery-operated ring
The influence in border., can be by increasing disconnect switch and calibrating resistance to measuring system when needing to be monitored more batteries
It is extended.
The peak value of accumulator internal resistance r two ends response voltage is Ur, and the peak value of calibrating resistance R two ends response voltage is UR, swash
Encourage drive circuit is to the exciting current of battery feed-in：I (t)=Isin (ω t)；
The voltage responsive at battery two ends is：
The voltage responsive at calibrating resistance R two ends is：
It is equal to flow through calibrating resistance R and battery transient current, so there is following equation to set up：
R=R.Ur/UR(1)；
From formula (1), without exciting current information, accumulator internal resistance r completely can be by calibrating resistance R, measurable
Calibrating resistance R two ends response voltage peak value URCalculated with the peak value Ur of the response voltage at accumulator internal resistance r two ends.
Claims (5)
1. accumulator failure early-warning apparatus, it is characterised in that：The SPWM controls being connected including central processing unit and with central processing unit
Circuit and voltage sampling circuit processed, in addition to excitation drive circuit, the excited target end of the excitation drive circuit respectively with SPWM
Circuit and signal generator connection are controlled, the output loop of the excitation drive circuit has been sequentially connected in series calibrating resistance and open circuit is opened
Close and be connected with the negative pole of mesuring battary group, the input circuit of the exciting circuit passes through disconnect switch and mesuring battary group respectively
Positive pole connection, the two ends and the two poles of the earth of mesuring battary group of the voltage sample end of the voltage sampling circuit respectively with calibrating resistance
Connection.
2. accumulator failure early-warning apparatus according to claim 1, it is characterised in that：The excitation drive circuit input circuit
On be also in series with RC filter circuits and inductive magnetic loop circuit.
3. accumulator failure early-warning apparatus according to claim 1, it is characterised in that：The central processing unit is also associated with accusing
Alert display circuit, data storage service controller and ON-OFF control circuit.
4. accumulator failure early-warning apparatus according to claim 1, it is characterised in that：The voltage sampling circuit includes voltage
Signal conditioning circuit and A/D converter circuit, the A/D converter circuit digital output end are connected by spi bus and central processing unit
Connect.
5. accumulator failure early-warning apparatus according to claim 1, it is characterised in that：The central processing unit is controlled by switching
The controlled end connection of circuit and disconnect switch processed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621460330.XU CN206479620U (en) | 2016-12-28 | 2016-12-28 | Accumulator failure early-warning apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621460330.XU CN206479620U (en) | 2016-12-28 | 2016-12-28 | Accumulator failure early-warning apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206479620U true CN206479620U (en) | 2017-09-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621460330.XU Active CN206479620U (en) | 2016-12-28 | 2016-12-28 | Accumulator failure early-warning apparatus |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108224710A (en) * | 2018-02-08 | 2018-06-29 | 珠海格力电器股份有限公司 | Internal resistance of cell detection circuit and energy-storage battery air-conditioning |
-
2016
- 2016-12-28 CN CN201621460330.XU patent/CN206479620U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108224710A (en) * | 2018-02-08 | 2018-06-29 | 珠海格力电器股份有限公司 | Internal resistance of cell detection circuit and energy-storage battery air-conditioning |
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