CN205581212U - Power battery internal resistance on -line monitoring system - Google Patents
Power battery internal resistance on -line monitoring system Download PDFInfo
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- CN205581212U CN205581212U CN201620317002.8U CN201620317002U CN205581212U CN 205581212 U CN205581212 U CN 205581212U CN 201620317002 U CN201620317002 U CN 201620317002U CN 205581212 U CN205581212 U CN 205581212U
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Abstract
The utility model discloses a power battery internal resistance on -line monitoring system comprises source transformation unit, signal generation unit, detection circuitry unit, signal acquisition element and the main control unit. The detection circuitry unit includes to separate straightens module, three select switch K, four -wire standard resistance r1, four -wire standard resistance r2 and reference resistance r0. Signal generation unit sends drive signal, and the magnitude of voltage U3's that the magnitude of voltage U2 that magnitude of voltage U1, a four -wire standard resistance r2 that the reference voltage value U, the four -wire standard resistance r1 that realize reference resistance r0 through the detection circuitry unit correspond and the four -wire anchor clamps power battery E that awaits measuring correspond detection is sensed by signal acquisition element and is realized power battery internal resistance detection among the the main control unit. The utility model discloses can accomplish the on -line measuring of power battery internal resistance under the condition that need not gather alternating current signal, it is little to power battery's harm, contact resistance and wire resistance can be eliminated to measuring result's influence, dependable performance to the measuring circuit.
Description
Technical field
This utility model relates to electrokinetic cell monitoring technical field, is specifically related to a kind of electrokinetic cell internal resistance and exists
Line monitoring system.
Background technology
Electrokinetic cell obtains widely in fields such as electric automobile, electric tool, transformer station and mobile base stations
Application.The performance and used life of electrokinetic cell is all closely related with the internal resistance of battery, and along with battery
Aging, the internal resistance of battery constantly changes, and life-span and power supply capacity that battery can use all can occur
Change.By the detection of the internal resistance of cell being found in time the change of battery performance, for formulating reasonably
Battery management strategy lays the foundation.
Detecting for the internal resistance of cell, at present conventional method has: direct-current discharge internal resistance detection method with exchange
Signal injects detection method.Direct-current discharge internal resistance detection method, although hardware circuit is simple, circuit
Stable, capacity of resisting disturbance is strong, but is intended to reach the highest accuracy of detection, and the resistance of detection resistance just must
Must be the least, and the voltage of electrokinetic cell is the highest, during such circuit ON, the discharge current of battery can be very
Greatly, long-time use can greatly reduce the service life of battery, and heavy-current discharge itself also has the highest
Danger, relevant device is the biggest；Simultaneously when the internal resistance of cell is excessive, cannot provide enough
Moment constant current, the accuracy that impact is measured.AC signal injects detection method, though will not be as direct current
There is the situation of heavy-current discharge in electric discharge internal resistance detection method.But, actual battery model is the most complicated,
It is particularly pertinent that its internal capacitance and inductance characteristic sometimes can show, and the AC signal of addition is easy to
Existing distortion, interference free performance is poor, finally wants to reach the highest accuracy of detection, to whole system
Signal handling capacity requires the highest.And stable AC signal needed for producing is the most more complicated and difficult,
So, high accuracy battery internal resistance detection instrument present on current market, it mostly is in large-scale reserve battery
Resistance detection equipment, these equipment are the most bulky and heavy.
In order to overcome AC signal above to inject the shortcoming of detection method, notification number be CN101685117,
The utility model patent of entitled " internal resistance measurement method of accumulator " proposes a kind of accumulator internal resistance and surveys
Metering method, the method is by pumping signal generating unit, mesuring battary, sample resistance and isolated DC electric capacity
It is together in series；Respectively the voltage response signal at accumulator and sample resistance two ends is passed through active bandpass filiter
Device extracts useful signal；Extract signal and pass through peak detection unit, it is thus achieved that its crest voltage；Again by peak value
Voltage amplification, sends into AD and is processed by single-chip microcomputer, calculating internal resistance.Though this patent makes equipment letter
List and volume are little, it is possible to reduction noise and the impact of distortion, but the contact in whole circuit when measuring
Resistance or conductor resistance all can have considerable influence to the precision of testing result.
Utility model content
Technical problem to be solved in the utility model be existing electrokinetic cell internal resistance detection during exist
The problems such as measuring accuracy is the highest, big to cell damage and equipment volume is big, it is provided that in a kind of electrokinetic cell
Resistance on-line monitoring system.
For solving the problems referred to above, this utility model is achieved through the following technical solutions:
A kind of electrokinetic cell internal resistance on-line monitoring system, by power conversion unit, signal generation unit, inspection
Slowdown monitoring circuit unit, signal gathering unit and main control unit composition；The input of power conversion unit is with outer
Portion's power supply is connected, and the outfan of power conversion unit connects signal generation unit, signal gathering unit and master
Control unit；Above-mentioned testing circuit unit includes every straight module, three selection switch K, four line standards electricity
Resistance r1, four line standard resistance r2 and reference resistance r0；Input every straight module connects signal and produces single
The outfan of unit, the outfan every straight module connects three inputs selecting switch K；Four line standard electricity
The first end a1 of resistance r1 connects three the first outfans selecting switch K, the of four line standard resistance r2
One end a2 connects three the second outfans selecting switch K, the first of four wire holder electrokinetic cell E to be measured
End a3 connects three the 3rd outfans selecting switch K；The second end b1 of four line standard resistance r1, four
The second end b2 of line standard resistance r2, the second end b3 of four wire holder electrokinetic cell E to be measured, reference electricity
Resistance one end of r0, the reference input of signal gathering unit are connected with the reference input of main control unit；
The 3rd end c1 of four line standard resistance r1, the 3rd end c2 of four line standard resistance r2, four wire holder to be measured
The other end of the 3rd end c3 and reference resistance r0 of electrokinetic cell E simultaneously with the ground connection of signal generation unit
End connects；The 4th end d1 of four line standard resistance r1, the 4th end d2 of four line standard resistance r2 and treat
The 4th end d3 surveying four wire holder electrokinetic cell E connects the measurement input of signal gathering unit；Signal is adopted
The outfan of collection unit is connected with the measurement input of main control unit.
In such scheme, signal generation unit includes Precision Wave-Form Generator IC U1, smart power operation amplifier
Device U2 and accurate great current operation amplifier U3；Precision Wave-Form Generator IC U1, smart power computing
The power end of amplifier U2 and accurate great current operation amplifier U3 all with the outfan of power conversion unit
Connect；The outfan of Precision Wave-Form Generator IC U1 connects the input of smart power operational amplifier U2,
The outfan of smart power operational amplifier U2 is connected with the input of accurate great current operation amplifier U3,
The outfan of accurate great current operation amplifier U3 forms the outfan of signal generation unit, and with every straight mould
The input of block connects.
In such scheme, signal gathering unit includes high-precision meter amplifier U4 and U5, accurate low mistake
Heighten impedance op-amps U6 and U7, balanced modulation demodulator U8 and accurate low imbalance low drifting
Operational amplifier U9；High-precision meter amplifier U4 and U5, accurate low imbalance high input impedance operational amplifier
U6 and U7, balanced modulation demodulator U8 and the power supply of accurate low imbalance low drifting operating amplifier U9
End is all connected with the outfan of power conversion unit；The input of high-precision meter amplifier U4 forms signal
The measurement input of collecting unit, and simultaneously with the 4th end d1, four line standards of four line standard resistance r1
The 4th end d3 of the 4th end d2 and four wire holder electrokinetic cell E to be measured of resistance r2 connects；Instrument in high precision
The input of outfan imbalance low with the precision high input impedance operational amplifier U6 of table amplifier U4 is connected；Essence
The outfan of close low imbalance high input impedance operational amplifier U6 connects the measurement input of balanced modulation demodulator U8
End；The input of high-precision meter amplifier U5 forms the reference input of signal gathering unit, and with ginseng
The one end examining resistance r0 connects；The outfan of high-precision meter amplifier U5 and precision low imbalance high impedance
The input of operational amplifier U7 connects；The outfan of accurate low imbalance high input impedance operational amplifier U7 is even
Connect the reference input of balanced modulation demodulator U8；The outfan of balanced modulation demodulator U8 connects precision
The input of low imbalance low drifting operating amplifier U9, accurate low imbalance low drifting operating amplifier U9's
Outfan forms the outfan of signal gathering unit, and is connected with the measurement input of main control unit.
In such scheme, power conversion unit include DC-DC voltage conversion manostat U10 and U11, with
And low-voltage-drop linear voltage regulator U12；The input of DC-DC voltage conversion manostat U10 and external power source phase
Even, the outfan of DC-DC voltage conversion manostat U10 connects signal generation unit, signal gathering unit
With the input of DC-DC voltage conversion manostat U11, the output of DC-DC voltage conversion manostat U11
End connects input and main control unit, the low-voltage-drop linear voltage regulator U12 of low-voltage-drop linear voltage regulator U12
Outfan connect main control unit.
Compared with prior art, the electrokinetic cell internal resistance on-line monitoring system designed by this utility model is set up
Between electrokinetic cell and controller of battery management system；Can be complete in the case of need not gathering AC signal
Becoming the on-line checking of electrokinetic cell internal resistance, the infringement to electrokinetic cell is little；Measuring circuit can eliminate contact
Resistance and the conductor resistance impact on measurement result, dependable performance；Multiple communication module is had to be easy to and other
System communication is integrated, and can show and Android mobile phone control by liquid crystal touch control, and makes the health status of battery
Classifying alarm.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of electrokinetic cell internal resistance on-line monitoring system.
Fig. 2 is the signal generation unit circuit theory schematic diagram of electrokinetic cell internal resistance on-line monitoring system.
Fig. 3 is the signal gathering unit circuit theory schematic diagram of electrokinetic cell internal resistance on-line monitoring system.
Fig. 4 is the power conversion unit circuit theory schematic diagram of electrokinetic cell internal resistance on-line monitoring system.
Fig. 5 is the main control unit circuit block diagram of electrokinetic cell internal resistance on-line monitoring system.
Detailed description of the invention
A kind of electrokinetic cell internal resistance on-line monitoring system, as it is shown in figure 1, mainly by signal generation unit,
Testing circuit unit, signal gathering unit, power conversion unit and main control unit composition.System is overall
There are two loops, respectively drive circuit and loop inductance.
Testing circuit unit includes every straight module, three selections switch K, four line standard resistance r1, four lines
Measuring resistance r2, reference resistance r0 and four wire holder electrokinetic cell E to be measured.Input every straight module connects
Connecing the outfan of signal generation unit, the outfan every straight module connects three inputs selecting switch K.
The first end a1 of four line standard resistance r1 connects three the first outfans selecting switch K, four line standards
The first end a2 of resistance r2 connects three the second outfans selecting switch K, four wire holder power to be measured
The first end a3 of battery E connects three the 3rd outfans selecting switch K.Four line standard resistance r1's
Second end b1, the second end b2 of four line standard resistance r2, the second of four wire holder electrokinetic cell E to be measured
End b3, one end of reference resistance r0, the reference input of signal gathering unit and the ginseng of main control unit
Examine input to be connected.The 3rd end c1 of four line standard resistance r1, the 3rd end c2 of four line standard resistance r2,
The other end of the 3rd end c3 and reference resistance r0 of four wire holder electrokinetic cell E to be measured produces with signal simultaneously
The earth terminal of raw unit connects.The 4th end d1 of four line standard resistance r1, the of four line standard resistance r2
The measurement that the 4th end d3 of four end d2 and four wire holder electrokinetic cell E to be measured connects signal gathering unit is defeated
Enter end；The outfan of signal gathering unit is connected with the measurement input of main control unit.By three selections
Switch K selects to input a signal in the first path or alternate path or third path.First
Path signal out is input in reference resistance r0 through four line standard resistance r1；Alternate path is out
Signal is input in reference resistance r0 through four line standard resistance r2；Third path signal out is through to be measured
Four wire holder electrokinetic cell E are input in reference resistance r0.Reference resistance r0 connects signal generation unit.
Four line standard resistance r1, four line standard resistance r2 and the output signal of four wire holder electrokinetic cell E to be measured
It is input to signal gathering unit；Meanwhile, the reference signal outfan of reference resistance r0 connects signals collecting list
Unit and main control unit.See Fig. 1.
Signal generation unit includes that Precision Wave-Form Generator IC U1, smart power operational amplifier U2, precision are big
The resistance R1-R14 and electric capacity C1-C5 of current operational amplifier U3 and periphery.Precision Wave-Form Generator IC
The input of U1 connects the outfan of power conversion unit, and the outfan of Precision Wave-Form Generator IC U1 is through essence
Close power operational amplifier U2 is connected with accurate great current operation amplifier U3, and accurate great current operation is put
Big device U3 outfan is through in straight module is connected serially to testing circuit unit.Wherein, accurate waveform occurs
Device U1 is for producing the AC signal required for whole system, and passes through smart power operational amplifier
U2 improves its carrying load ability, and is transferred to accurate great current operation amplifier U3, to produce exchange
Electric current, and the alternating current produced passes through every straight module serial input to testing circuit unit.See Fig. 2.
Signal gathering unit includes high-precision meter amplifier U4 and U5, accurate low imbalance high impedance computing
Amplifier U6 and U7, balanced modulation demodulator U8, accurate low imbalance low drifting operating amplifier U9, with
And the resistance R1-1 to R1-7 of periphery, electric capacity C1-1 to C1-7, resistance R2-1 to R2-7, electric capacity C2-1
To C2-7, resistance R15-R22 and electric capacity C6-C9.High-precision meter amplifier U4 and U5, precision are low
Imbalance high input impedance operational amplifier U6 and U7, balanced modulation demodulator U8 and the accurate low drift of low imbalance
The power end moving operational amplifier U9 is all connected with the outfan of power conversion unit.
The measurement input of the input formation signal gathering unit of high-precision meter amplifier U4, and simultaneously
The 4th end d1, the 4th end d2 of four line standard resistance r2 and four lines to be measured with four line standard resistance r1
The 4th end d3 of fixture electrokinetic cell E connects.The input of high-precision meter amplifier U4 specifically connects
The 4th end d3 or the 4th end d1 of four line standard resistance r1 of four wire holder electrokinetic cell E to be measured or four lines
4th end d2 of measuring resistance r2, is selected switch K to select by three here.High-precision meter amplifies
The input of the outfan of device U4 imbalance low with precision high input impedance operational amplifier U6 is connected；Accurate low mistake
The outfan heightening impedance op-amps U6 connects the measurement input of balanced modulation demodulator U8.High
The input of precision instrument amplifier U5 forms the reference input of signal gathering unit, and and reference resistance
One end of r0 connects.Outfan imbalance low with the precision high impedance computing of high-precision meter amplifier U5 is put
The input of big device U7 connects；The outfan of accurate low imbalance high input impedance operational amplifier U7 connects balance
The reference input of modem U8.The outfan of balanced modulation demodulator U8 connects accurate low imbalance
The input of low drifting operating amplifier U9, the outfan of accurate low imbalance low drifting operating amplifier U9
Form the outfan of signal gathering unit, and be connected with the measurement input of main control unit.Instrument in high precision
Table amplifier U4 and U5 signal in amplifying circuit, and put through accurate low imbalance high impedance computing
Signal after big device U6 and U7 will amplify is filtered processing, accurate low imbalance high input impedance operational amplifier
The output signal of U6 and U7 is input to balanced modulation demodulator U8.Balanced modulation demodulator U8 is defeated by two
Go out signal to be multiplied, and the signal produced is filtered by accurate low imbalance low drifting operating amplifier U9
Main control unit it is input to after ripple.See Fig. 3.
Power conversion unit includes that DC-DC voltage changes manostat U10 and U11, low-voltage drop linear voltage stabilizing
Device U12, and the resistance R23 of periphery, light emitting diode D1, electric capacity C10 to C12 and electrochemical capacitor
C01 to C03.Wherein, the input of DC-DC voltage conversion manostat U10 connects external power source, DC-DC
Voltage conversion manostat U10 outfan connects the input of another DC-DC voltage conversion manostat U11
With the signal generation unit in system and signal gathering unit；The input of low-voltage-drop linear voltage regulator U12
Connect the outfan of DC-DC voltage conversion manostat U11, the outfan of low-voltage-drop linear voltage regulator U12
Main control unit in connection system.The input of power conversion unit is connected with external power source, and power supply becomes
The outfan changing unit is connected with each unit needing power supply.The electricity of external power source passes through power conversion
Unit, becomes +/-15V required for circuit, 5V and 3.3V voltage, in order to be supplied to unit,
Wherein signal generation unit and signal gathering unit need the voltage of V+, V-of +/-15V.Main control unit
Meet 5V and 3.3V.See Fig. 4.
Data, after signal gathering unit obtains data, are processed and analyze by main control unit, and lead to
Cross lcd touch module and grade alarm module carry out touch-control and shows and report to the police, also by CAN communication module,
Bluetooth communication module and serial communication module interact with battery management system, Android mobile phone and computer.
See Fig. 5.
A kind of electrokinetic cell internal resistance on-line monitoring method that said system is realized, signal generation unit produces
AC signal by being injected into testing circuit unit every straight module in.In testing circuit unit, three
Selecting switch K first to select the first path, it is right that signal gathering unit can collect four line standard resistance r1 institutes
The magnitude of voltage U answered1；Then three select switch K reselection alternate path, and signal gathering unit can
Collect a magnitude of voltage U corresponding to four line standard resistance r22；Last three select switch K to select the
Three-way, signal gathering unit can collect a voltage corresponding to four wire holder electrokinetic cell E to be measured
Value U3.The voltage gathering reference resistance r0 can obtain a corresponding reference voltage level U.Due to electricity
In road, alternating current keeps constant, and there is the internal resistance re of resistance r and battery on circuit, then former according to circuit
Reason has:
Can be obtained by (1), (2):
Can be obtained by (3), (4) simultaneous again:
Wherein, r1It it is the resistance value of four line standard resistance r1；r2It it is the resistance value of four line standard resistance r2.
Carry out processing, calculate and analyzing by software programming and the data collected thereafter according to formula master chip,
Obtain corresponding internal resistance value, and show, judge and report to the police.
Content described above is only preferred implementation of the present utility model, although new to this practicality
Type has been described in detail, for the staff of the art, and can in form and details
On it is made various change, these changes also should be regarded as protection domain of the present utility model.
Claims (4)
1. an electrokinetic cell internal resistance on-line monitoring system, it is characterised in that: by power conversion unit,
Signal generation unit, testing circuit unit, signal gathering unit and main control unit composition；Power supply becomes
The input changing unit is connected with external power source, and the outfan of power conversion unit connects signal and produces single
Unit, signal gathering unit and main control unit；
Above-mentioned testing circuit unit include every straight module, three select switch K, four line standard resistance r1,
Four line standard resistance r2 and reference resistance r0；
Input every straight module connects the outfan of signal generation unit, and the outfan every straight module connects
Connect three inputs selecting switch K；
First three the first outfans selecting switch K of end a1 connection of four line standard resistance r1, four
The first end a2 of line standard resistance r2 connects three the second outfans selecting switch K, four lines to be measured
The first end a3 of fixture electrokinetic cell E connects three the 3rd outfans selecting switch K；
The second end b1 of four line standard resistance r1, the second end b2 of four line standard resistance r2, to be measured
The second end b3 of four wire holder electrokinetic cell E, one end of reference resistance r0, signal gathering unit
Reference input is connected with the reference input of main control unit；
The 3rd end c1 of four line standard resistance r1, the 3rd end c2 of four line standard resistance r2, to be measured
The other end of the 3rd end c3 and reference resistance r0 of four wire holder electrokinetic cell E produces with signal simultaneously
The earth terminal of unit connects；
The 4th end d1 of four line standard resistance r1, the 4th end d2 of four line standard resistance r2 and to be measured
The 4th end d3 of four wire holder electrokinetic cell E connects the measurement input of signal gathering unit；Signal
The outfan of collecting unit is connected with the measurement input of main control unit.
A kind of electrokinetic cell internal resistance on-line monitoring system the most according to claim 1, its feature
Be: signal generation unit include Precision Wave-Form Generator IC U1, smart power operational amplifier U2,
And precision great current operation amplifier U3；Precision Wave-Form Generator IC U1, smart power operation amplifier
The power end of device U2 and accurate great current operation amplifier U3 all with the outfan company of power conversion unit
Connect；
The outfan of Precision Wave-Form Generator IC U1 connects the input of smart power operational amplifier U2,
The outfan of smart power operational amplifier U2 connects with the input of accurate great current operation amplifier U3
Connecing, the outfan of accurate great current operation amplifier U3 forms the outfan of signal generation unit, and
It is connected with the input every straight module.
A kind of electrokinetic cell internal resistance on-line monitoring system the most according to claim 1, its feature
It is: signal gathering unit includes high-precision meter amplifier U4 and U5, accurate low imbalance high impedance
Operational amplifier U6 and U7, balanced modulation demodulator U8 and accurate low imbalance low drifting computing are put
Big device U9；High-precision meter amplifier U4 and U5, accurate low imbalance high input impedance operational amplifier U6
With U7, balanced modulation demodulator U8 and the power supply of accurate low imbalance low drifting operating amplifier U9
End is all connected with the outfan of power conversion unit；
The input of high-precision meter amplifier U4 forms the measurement input of signal gathering unit, and
Simultaneously with the 4th end d1, the 4th end d2 of four line standard resistance r2 of four line standard resistance r1 and treat
The 4th end d3 surveying four wire holder electrokinetic cell E connects；The outfan of high-precision meter amplifier U4
The input of imbalance high input impedance operational amplifier U6 low with precision is connected；Accurate low imbalance high impedance fortune
The outfan calculating amplifier U6 connects the measurement input of balanced modulation demodulator U8；
The input of high-precision meter amplifier U5 forms the reference input of signal gathering unit, and
It is connected with one end of reference resistance r0；The outfan of high-precision meter amplifier U5 and the low imbalance of precision
The input of high input impedance operational amplifier U7 connects；Accurate low imbalance high input impedance operational amplifier U7's
Outfan connects the reference input of balanced modulation demodulator U8；
The outfan of balanced modulation demodulator U8 connects accurate low imbalance low drifting operating amplifier U9's
Input, the outfan of accurate low imbalance low drifting operating amplifier U9 forms signal gathering unit
Outfan, and be connected with the measurement input of main control unit.
A kind of electrokinetic cell internal resistance on-line monitoring system the most according to claim 1, its feature
It is: power conversion unit includes DC-DC voltage conversion manostat U10 and U11 and low pressure drop
Linear voltage regulator U12；The input of DC-DC voltage conversion manostat U10 is connected with external power source,
DC-DC voltage conversion manostat U10 outfan connect signal generation unit, signal gathering unit and
The input of DC-DC voltage conversion manostat U11, the output of DC-DC voltage conversion manostat U11
End connects input and main control unit, the low-voltage-drop linear voltage regulator of low-voltage-drop linear voltage regulator U12
The outfan of U12 connects main control unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620317002.8U CN205581212U (en) | 2016-04-15 | 2016-04-15 | Power battery internal resistance on -line monitoring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620317002.8U CN205581212U (en) | 2016-04-15 | 2016-04-15 | Power battery internal resistance on -line monitoring system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205581212U true CN205581212U (en) | 2016-09-14 |
Family
ID=56862761
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620317002.8U Withdrawn - After Issue CN205581212U (en) | 2016-04-15 | 2016-04-15 | Power battery internal resistance on -line monitoring system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205581212U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105675996A (en) * | 2016-04-15 | 2016-06-15 | 桂林电子科技大学 | Power cell internal resistance on-line monitoring system and method |
| TWI658279B (en) * | 2017-03-20 | 2019-05-01 | 上海騏宏電驅動科技有限公司 | Resistance measurement system and resistance measurement device |
| CN113589045A (en) * | 2018-01-17 | 2021-11-02 | 珠海极海半导体有限公司 | Sensitive resistance measuring device and measuring method |
-
2016
- 2016-04-15 CN CN201620317002.8U patent/CN205581212U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105675996A (en) * | 2016-04-15 | 2016-06-15 | 桂林电子科技大学 | Power cell internal resistance on-line monitoring system and method |
| CN105675996B (en) * | 2016-04-15 | 2018-04-17 | 桂林电子科技大学 | A kind of power battery internal resistance on-line monitoring system and method |
| TWI658279B (en) * | 2017-03-20 | 2019-05-01 | 上海騏宏電驅動科技有限公司 | Resistance measurement system and resistance measurement device |
| CN113589045A (en) * | 2018-01-17 | 2021-11-02 | 珠海极海半导体有限公司 | Sensitive resistance measuring device and measuring method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20160914 Effective date of abandoning: 20180417 |
|
| AV01 | Patent right actively abandoned |