CN103592605B - A kind of lithium thionyl chloride battery pack management system and method - Google Patents
A kind of lithium thionyl chloride battery pack management system and method Download PDFInfo
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Abstract
The present invention relates to a kind of lithium thionyl chloride battery pack management system, including lithium thionyl chloride cell group, described lithium thionyl chloride battery pack management system also includes: current measuring unit, and described current measuring unit measures current signal, and passes the measurements to analytic unit；Analytic unit, described analytic unit variable period gathers described measurement result and obtains current value, obtains battery capacity loss according to described current value.Present invention also offers a kind of lithium thionyl chloride cell group management method.The present invention has the advantages such as accurate, the battery working time length of Capacity Predication of Battery.
Description
Technical field
The present invention relates to a kind of batteries management system and method, especially a kind of lithium thionyl chloride battery pack management system
And method.
Background technology
Lithium-thionyl chloride (Li/SOCL2) battery is a kind of battery that in all kinds of lithium battery, specific energy is the highest, actual specific energy
Up to 660kwh/kg.Additionally, lithium thionyl chloride cell also has the outstanding advantages such as discharging voltage balance, broad application temperature range.
Due to these outstanding advantages of lithium-thionyl chloride (Li/SOCL2) battery, this type of battery is particularly suitable for working online for a long time
In the equipment such as remote meter table, distance apparatus.
Remote meter table it is generally required to rely on battery power 1 year even more long-time, but battery electric quantity is limited, is satisfied
The lasting non-stop run of remote meter table, needs to regularly replace battery, to ensure that all instrument have lasting power supply.If
Remote meter table can be predicted the dump energy of battery accurately and predict the residue working time, and extends battery as far as possible
Power-on time is significant for safeguarding remote meter table.Therefore an energy Accurate Prediction battery dump energy and energy
It is extremely important that enough lithium thionyl chloride cells as far as possible extending service time of battery manage system.
But, the work characteristics of remote meter table and the inherent characteristic of lithium thionyl chloride cell make this type of battery pack pipe
The design of reason system becomes extremely difficult.3 factors cause a difficult problem for this type of Capacity Predication of Battery below.
First, from the point of view of the work characteristics of remote meter table, in order to reduce power consumption, remote meter table is typically understood the cycle
Property dormancy and waking up up, its operating current is dynamically change, and the operating current of awakening phase is far above the dormant stage, but wakes up up
The working time in stage is but much smaller than the dormant stage；
Secondly, the discharge curve of lithium thionyl chloride cell characteristic is very mild, and before the electricity 90% is released, voltage is all
Maintaining more than 3.6V, then, along with the further reduction of voltage, cell voltage starts drastically to decline, remote meter table without
Method sends low electricity in time and reports to the police according to cell voltage；
Finally, lithium thionyl chloride cell is used for low-power consumption instrument, the temperature of battery itself and battery local environment temperature base
This is identical, and the self-discharge rate of this type of battery fluctuates the biggest with the change of environment temperature.Year self-discharge rate is less than 2% at normal temperatures,
And under 50 DEG C of high temperature, year self-discharge rate can be up to 6%, for the far distance instrument being operated in field, temperature conditions ten
Split pole end, increases the difficulty of Capacity Predication of Battery further.
Summary of the invention
In order to solve above-mentioned deficiency of the prior art, the invention provides one can Accurate Prediction lithium-thionyl chloride electricity
Pond dump energy, can extend again lithium thionyl chloride battery pack management system and the method for service time of battery.
For achieving the above object, the present invention adopts the following technical scheme that
A kind of lithium thionyl chloride battery pack management system, is characterized in: described lithium thionyl chloride battery pack management system bag
Include:
Current measuring unit, described current measuring unit is measured the current signal in circuit residing for described battery pack, and is incited somebody to action
Measurement result passes to analytic unit；
Analytic unit, described analytic unit variable period gathers described measurement result and obtains current value, according to described electric current
Value obtains battery capacity loss.
Further, described analytic unit uses Current integrating method to obtain battery capacity loss according to described electric current.
Further, described analytic unit uses relatively low frequency sampling when described lithium thionyl chloride cell group is standby, fortune
Higher frequency sampling is used during row.
Further, described lithium thionyl chloride battery pack management system also includes
Temperature measurement unit, described temperature measurement unit includes temperature sensor, and it is sub-that described temperature sensing unit measures lithium
Environment temperature residing for chlorosulfuric acid battery pack temperature information measurement obtained pass to analytic unit；
Described analytic unit obtains the self-discharge rate of lithium thionyl chloride cell group according to described temperature information；And according to battery
The loss of rated capacity, described self-discharge rate, described battery capacity obtains battery remaining power.
Further, described analytic unit obtains battery life according to described battery remaining power.
Further, described analytic unit obtains described battery pack according to described battery remaining power and currently runs power consumption, and
Battery life is obtained according to described current operation power consumption.
Further, obtain average power consumption according to the power consumption that m the cycle in the time period of current period place is corresponding, and by institute
Stating average power consumption and currently run power consumption as battery pack, m is natural number.
Further, described lithium thionyl chloride cell group also includes:
Battery disturbance recovery unit, described battery disturbance recovery unit is when described battery pack carries out micro-current working mode
Current impulse is periodically provided.
Further, lithium thionyl chloride battery pack management system also includes voltage acquisition unit.
Further, described analytic unit according to the collection result of current acquisition unit and the overcurrent value that is previously set to circuit
Carry out short circuit/overcurrent protection.
Present invention also offers a kind of lithium thionyl chloride cell group management method, comprise the following steps:
Current acquisition unit variable period gathers the current signal in circuit residing for lithium thionyl chloride cell group, and collection is tied
Fruit passes to analytic unit；
Described analytic unit obtains current value according to described collection result, and obtains battery capacity damage by described current value
Consumption.
Further, described analytic unit uses Current integrating method to obtain battery capacity loss according to described electric current.
Further, described current acquisition unit uses relatively low frequency to adopt when described lithium thionyl chloride cell group is standby
Sample, uses higher frequency sampling during operation.
Further, the environment temperature residing for lithium thionyl chloride cell group is measured；Lithium-thionyl is obtained according to described environment temperature
The self-discharge rate of acyl chlorides battery pack, and obtain battery according to battery rated capacity, described self-discharge rate, the loss of described battery capacity
Residual capacity.
Further, described analytic unit obtains battery life according to described battery remaining power.
Further, described analytic unit obtains described battery pack according to described battery remaining power and currently runs power consumption, and
Battery life is obtained according to described current operation power consumption.
Further, obtain average power consumption according to the power consumption that front m the cycle in the time period of current period place is corresponding, and will
Described average power consumption currently runs power consumption as battery pack, and m is natural number.
Further, current impulse is periodically provided when described battery pack carries out micro-current working mode.
Present invention also offers and a kind of exist according to lithium thionyl chloride battery pack management system described above or management method
Application in remote meter table.
The present invention compared with prior art has the advantages that
1, the present invention is by carrying out variable period sampling to the electric current under different operating state, and sampled value covers instrument and runs
Each stage, battery capacity loss, thus Accurate Prediction dump energy can be measured more accurately.
Meanwhile, the Accurate Prediction of battery dump energy so that the acquisition of battery life is more accurate so that system can
Sending battery pack low electricity early warning in time, staff changes battery pack in time according to context signals, it is ensured that the continuous fortune of instrument
OK.
For remote meter table, this to the sampling of electric current variable period and then obtain dump energy and cruising time
Means are more suitable for its periodic dormancy and the mode of operation waken up up so that staff's prison to far distance instrument dump energy
Control convenient and accurate.
2, the present invention is compensated by the self-discharge rate relevant to temperature, updates, by the cycle, the electricity damage that self-discharge rate brings
Lose so that the prediction of battery electric quantity is no longer limited by temperature conditions so that the far distance instrument being under temperature extreme condition
The prediction of battery electric quantity is more accurate, is very easy to the Capacity Predication of Battery of far distance instrument.
3, the present invention eliminates the delayed impact brought of cell voltage, no by applying disturbance regular on battery recovery load
Depending on special material and Special complex technique, cost is lower, be more easy to realization.
Accompanying drawing explanation
Fig. 1 is lithium thionyl chloride battery pack management system block diagram in embodiment 1；
Fig. 2 is operating current and sampling schematic diagram in embodiment 1；
Fig. 3 is lithium thionyl chloride battery pack management system block diagram in embodiment 2；
Fig. 4 is lithium thionyl chloride cell self-discharge rate temperature profile in embodiment 2；
Fig. 5 is lithium thionyl chloride battery pack management system block diagram in embodiment 4.
Detailed description of the invention
Embodiment 1
Referring to Fig. 1, a kind of lithium thionyl chloride battery pack management system, including lithium thionyl chloride cell group, current measurement
Unit 1 and analytic unit 21.
The battery pack of the present embodiment is that ER34615 battery 2 goes here and there 3 and 57000mAH, voltage 7.2V altogether.
Described current measuring unit 1 includes the little valued resistor R sealing in battery-powered outlets, amplifying circuit 11 and ADC
Sampler 12, described ADC sampler 12 is connected with analytic unit 21；
Analytic unit 21 reads the sample voltage value of described ADC sampler 12 according to the cycle variable period set.
Electric current is divided into two parts standby and runs by the cycling service rule according to instrument/instrument, treats electromechanics
Flowing the least and more stable, running current is big and changes greatly, and both differences are up to more than thousand times.
Further, referring to Fig. 2, described analytic unit 21 uses relatively low when described lithium thionyl chloride cell group is standby
Frequency (f1) sampling, use higher frequency (f during operation2) sampling, relatively low frequency (f described herein1) and higher frequency
(f2) it is comparatively speaking.
The present embodiment additionally provides a kind of lithium thionyl chloride cell group management method, in far distance instrument, including following
Step:
A, the lithium thionyl chloride battery pack management system of offer the present embodiment；
B, described current measuring unit 1 are measured current signal and pass the measurements to analytic unit 21:
Described little valued resistor RsVoltage difference (the R that two ends produces*iit) send into amplifying circuit (multiplication factor is G) enter
Row amplifies, and sends into ADC sampler 12 read voltage value afterwards, and passes the result to analytic unit 21.
C, described analytic unit 21 variable period gather described measurement result and obtain current value, obtain according to described current value
Battery capacity is lost:
C1, calculating current
Analytic unit 21 uses relatively low frequency (f when described lithium thionyl chloride cell group is standby1), run time use relatively
High frequency (f2), read the sample voltage value of described ADC sampler 12.
Described analytic unit 21 reads sampled value v of ADC sampler 12it, i.e. amplify the R of G timess*iit, finally according to amplification
Multiple and sampling resistor computing the resistor value load current: iit=vit/(G*Rs)；
Referring to Fig. 2, standby current is about 50uA, and running current is 1～100mA.Time standby, multiplication factor uses G1=2*
104, during operation, choose G2=1*102, small resistor Rs=0.1 Europe.Then standby load current: iit=0.5*vit(mA), load is run
Electric current: iit=100*vit(mA)。
C2, calculating battery capacity loss
The battery capacity loss C of the present embodimentc(n)Capacity for battery own loss.
Moving law according to instrument and meter carries out current sample, and makees to add up i.e. by the product of sampled value with sampling interval
Obtain the battery capacity of total sampling time internal consumption, i.e. battery capacity loss.
Further, described analytic unit uses Current integrating method to obtain battery capacity loss according to described electric current.
Battery capacity loss is calculated by below equation:
Wherein: Cc(n-1)For front (n-1) individual periodic battery capacity loss sum；It is to treat in the n-th cycle
Battery capacity (the T that machine consumes1=1/f1), M point sampled value altogether；It it is the n-th cycle interior electricity running consumption
Tankage (T2=1/f2), (N-M) individual sampled value altogether.
In the present embodiment, a cycle is 30min, within a cycle, and standby current IstandbyAbout 50uA, the time
28min；Running current IrunMean value is about 35mA, time 2min；Standby sample frequency f1=1Hz, runs sample frequency f2=
10Hz, then T1=1S, T2=0.1S。
Front 18120 periodic battery capacity loss sums are Cc(18120)=21623.5mAh.Calculate in this cycle by formula 1
In i.e. the 18121st cycle, battery capacity loss is:Before then
18121 periodic battery capacity loss are Cc(18121)=21622.3mAh。
The present embodiment is by carrying out variable period sampling to the electric current under different operating state, and sampled value covers instrument and runs
Each stage, can measure more accurately battery capacity loss.
For remote meter table, this means to the sampling of electric current variable period and then acquisition battery capacity loss are more
Add the mode of operation being suitable for its periodic dormancy and waking up up so that staff is to the monitoring of far distance instrument dump energy more
Convenient and accurate.
Embodiment 2
Referring to Fig. 3, a kind of lithium thionyl chloride battery pack management system, with the batteries management system described in embodiment 1
Except for the difference that: the lithium thionyl chloride battery pack management system of the present embodiment also includes:
Temperature measurement unit 3, described temperature measurement unit 3 is connected with analytic unit 22；Described temperature measurement unit 3 is used for
Measure the environment temperature residing for described lithium thionyl chloride cell group.
Described analytic unit 22 is measured the temperature information obtained and is calculated lithium thionyl chloride cell always according to temperature measurement unit 3
The self-discharge rate of group；And obtain remaining battery hold according to battery rated capacity, described self-discharge rate, the loss of described battery capacity
Amount.
The present embodiment additionally provides a kind of lithium thionyl chloride cell group management method, with the lithium-thionyl acyl described in embodiment 1
Unlike chlorine battery pack management method:
1, in step, it is provided that the lithium thionyl chloride battery pack management system of the present embodiment；
2, also include step D, calculate battery remaining power
D1, temperature
Lithium thionyl chloride cell is used for low-power consumption instrument, the temperature of battery itself and the battery basic phase of local environment temperature
With, the self-discharge rate of this type of battery fluctuates the biggest with the change of environment temperature.
Described temperature measurement unit 3 measures the environment temperature residing for described lithium thionyl chloride cell group, and by measurement result
Pass to analytic unit 22；
Described temperature measurement unit 3 includes the sampling thermistor R of series connectionTWith big resistance precision resistance R=10k Ω；String
Voltage V on the basis of the total voltage of connection circuitREF=2.5V, thermistor RTDividing potential drop coefficient to reference voltage is K2=vtt/ 2.5,
Wherein, vttFor thermistor RTVoltage；Gather thermistor RTVoltage vttAnd pass to analytic unit 22.
Analytic unit 22 is according to dividing potential drop coefficient calculations thermistor resistance RT, finally according to the temperature-resistance of thermistor
Formula calculates current environmental temperature value Ttemp。
VREF=2.5V, K2=vtt/ 2.5, R=10k Ω, then:
RT=K2*R/(1-K2)=10k*vtt/(2.5-vtt)
It is computed current environmental temperature sampled value TtempIt it is 32 DEG C.
D2, self-discharge rate k3′
Temperature information that described analytic unit 22 obtains according to the measurement of temperature sensor also combines known temperature-year
Self-discharge rate curve obtains the year self-discharge rate k of lithium thionyl chloride cell group3。
Owing to battery year self-discharge rate numerical value is relatively small, needs will be at TtempAt a temperature of battery year self-discharge rate numerical value
Convert and under cycle n times, obtain battery self discharge rate k3′。
In the present embodiment, Ttemp=32 DEG C, at this temperature, according to Fig. 4 self-discharge rate-temperature curve, corresponding with temperature
Year self-discharge rate k3Be 3%, i.e. TtempWhen=32 DEG C, k3=3%.Described year, self-discharge rate-temperature curve was according to existing experiment number
It is estimated acquisition.
The instrument cycle is 30min, battery year self-discharge rate measurement period be set to 72 hours i.e. 3 days (N=144), i.e. when
(n/144) convert when being integer.TtempAt a temperature of battery year self-discharge rate numerical value converted to the battery under cycle 144 times
Self-discharge rate k3' it is: K3'=3%*3/365=0.025%.
D3, battery remaining power
Described analytic unit 22 is lost according to battery rated capacity, self-discharge rate and described battery capacity and obtains remaining battery
Capacity.
The data that battery rated capacity C (mAh) is provided by battery producer obtain；Battery capacity loss Cc(n)Including battery originally
The electricity of body consumption and the loss brought by battery self discharge rate.The loss of described battery capacity was entered at the end of each cycle of operation
Row calculates, last all end of term contents of decrements obtain plus current time product integrated value in this cycle, and hold according to battery
Amount loss draws battery remaining power.
Generally instrument/instrument to collect cycle, self-discharge rate kwh loss was converted often all in several minutes or a few hours level
Time in the individual cycle, numerical value is the least, is unfavorable for the process of software algorithm.Therefore, battery self discharge rate is lost according to self-discharge of battery
Rate measurement period goes to calculate, and not calculates within each cycle of operation.
Then battery residual capacity C after n the cycle of workr(n)For:
Cr(n)=C-Cc(n)(n/N ≠ 1,2,3...) (formula 2)
Cr(n)=C-Cc(n)-k3’*Cr(n)(n/N=1,2,3...) (formula 3)
Can be calculated battery remaining power by formula 3 is:
Cr(n)=(C-Cc(n))/(1+k3’).(formula 4)
Battery rated capacity C=95AH in the present embodiment, standby sample frequency f1=1Hz, runs sample frequency f2=10Hz, then
T1=1S, T2=0.1S.Having obtained front 18121 periodic battery capacity loss in embodiment 1 is Cc(18121)=21622.3mAh。
Being calculated at 18121 all after dates by formula 3, battery remaining power is 35372.6mAh.
The present invention is compensated by the self-discharge rate relevant to temperature, updates, by the cycle, the electric quantity loss that self-discharge rate brings,
The prediction making battery electric quantity is no longer limited by temperature conditions so that the battery of the far distance instrument being under temperature extreme condition
The prediction of electricity is more accurate, is very easy to the Capacity Predication of Battery of far distance instrument.
Embodiment 3
A kind of lithium thionyl chloride battery pack management system, unlike the batteries management system described in embodiment 2: this
The analytic unit of embodiment obtains described battery pack according to described battery remaining power and currently runs power consumption, and according to described currently
Run power consumption and obtain battery life.
Further, obtain average power consumption according to the power consumption that front m the cycle of current period place time period is corresponding, and by institute
Stating average power consumption and currently run power consumption as battery pack, m is natural number.This m cycle can work as centered by current period
M cycle before or after the front cycle or include m cycle of current period.
The present embodiment additionally provides a kind of lithium thionyl chloride cell group management method, with the lithium-thionyl acyl described in embodiment 2
Unlike chlorine battery pack management method:
1, in step, it is provided that the lithium thionyl chloride battery pack management system of the present embodiment；
2, also including step E, analytic unit obtains described battery pack according to described battery remaining power and currently runs power consumption,
And obtain battery life according to described current operation power consumption.
Further, obtain average power consumption according to the power consumption that front m the cycle of current period place time period is corresponding, and by institute
Stating average power consumption and currently run power consumption as battery pack, m is natural number.
If with the n-th cycle as current period, the average power consumption C in m cycle after current periodavr(n), m is 3,
Can be obtained by below equation: Cavr(n)=(Cr(n)-Cr(n-3))/3 (formula 5)
In the present embodiment, can calculate with the 18121st cycle as current period according to formula 5, three week after which
The average power consumption of phase is:
Cavr(18121)=(Cr(18121)-Cr(18121-3))/3=1.24mAh
The T in cruising time under battery current state can be calculated further according to formula 1, formula 2, formula 4 and formula 5r(n):
Tr(n)=Cr(n)/Cavr(n)(formula 6)
In the present embodiment, can calculate battery according to formula 6 is current cruising time:
Tr(18121)=Cr(18121)/Cavr(18121)=17437 hours.
By the Accurate Prediction to battery dump energy so that the acquisition of battery life is more accurate so that system energy
Enough sending battery pack low electricity early warning in time, staff changes battery pack in time according to context signals, it is ensured that instrument continuous
Run.
Embodiment 4
Referring to Fig. 5, a kind of lithium thionyl chloride battery pack management system, with the batteries management system described in embodiment 3
Except for the difference that: the described lithium thionyl chloride battery pack management system of the present embodiment also includes:
Battery disturbance recovery unit 4, described battery disturbance recovery unit 4 carries out micro-current working mode in described battery pack
Time current impulse, the generation that suppression cell voltage is delayed are periodically provided.
Battery disturbance recovery unit 4 mainly with electronic switch MOSFET control break-make and is in parallel by one with battery
The battery disturbance of relation recovers resistance RdConstitute.Characteristic according to battery selects the most extensive with the running status of instrument/instrument
Telegram in reply stream (Irev=V/Rd) and disturbance cycle Tint, this RdTo come with battery average voltage according to the recommendation electric current of battery used
Choosing, the disturbance cycle to select according to average current during instrument low power operation, time, environment temperature, and as far as possible
Big, to reduce the reactive loss that disturbance recovery unit brings.
The present embodiment additionally provides a kind of lithium thionyl chloride cell group management method, with the lithium-thionyl acyl described in embodiment 3
Unlike chlorine battery pack management method:
1, in step, it is provided that the lithium thionyl chloride battery pack management system of the present embodiment；
2, also include step F, current impulse, suppression are periodically provided when described battery pack carries out micro-current working mode
The generation that cell voltage is delayed.
The present embodiment is according to battery standby electric current 50uA, and work maximum average temperature 34 DEG C, and the recommendation of battery pack recovers electricity
Stream is 180mA, and the time is 20S, and the disturbance cycle is 120h.Battery average voltage is 6.6V, chooses recovery resistance Rd=33 Ω/3W,
Disturbance cycle Tint=120h, then disturbance restoring current is about 200mA, and battery current averagely increases 8.3uA.
The present invention recovers load by applying disturbance regular on battery and eliminates the delayed impact brought of cell voltage, disobeys
Relying in special material and Special complex technique, cost is lower, be more easy to realization.
Above-mentioned embodiment should not be construed as limiting the scope of the invention.The present invention's it is crucial that: to different works
Make the electric current under state carry out variable period sampling and consider that the battery electric quantity that self-discharge rate brings is lost thus Accurate Prediction battery
Dump energy.Without departing from the spirit of the invention, any type of change made the present invention all should fall into this
Within bright protection domain.
Claims (7)
1. a lithium thionyl chloride battery pack management system, it is characterised in that: described lithium thionyl chloride battery pack management system bag
Include:
Current measuring unit, described current measuring unit is measured the current signal in circuit residing for described battery pack, and will be measured
Result passes to analytic unit；
Analytic unit, described analytic unit variable period gathers described measurement result and obtains current value, obtaining according to described current value
Obtain battery capacity loss；
Temperature measurement unit, described temperature measurement unit is measured the environment temperature residing for lithium thionyl chloride cell group and will measure
To temperature information pass to analytic unit；
Described analytic unit obtains the self-discharge rate of lithium thionyl chloride cell group according to described temperature information；And it is specified according to battery
Capacity, described self-discharge rate and the loss of described battery capacity obtain battery remaining power；
Battery disturbance recovery unit, described battery disturbance recovery unit cycle when described battery pack carries out micro-current working mode
Property current impulse, the suppression delayed generation of cell voltage are provided.
Lithium thionyl chloride battery pack management system the most according to claim 1, it is characterised in that: described analytic unit is in institute
State lithium thionyl chloride cell group standby time use relatively low frequency sampling, use higher frequency sampling during operation.
Lithium thionyl chloride battery pack management system the most according to claim 1, it is characterised in that: described analytic unit according to
Described battery remaining power obtains described battery pack and currently runs power consumption, and obtains battery durable according to described current operation power consumption
Time.
4. a lithium thionyl chloride cell group management method, comprises the following steps:
Variable period gathers the current signal in circuit residing for lithium thionyl chloride cell group, and obtains current value according to collection result；
Battery capacity loss is obtained according to described current value；
Measure the environment temperature residing for lithium thionyl chloride cell group；Lithium thionyl chloride cell group is obtained according to described environment temperature
Self-discharge rate, and acquisition battery remaining power is lost according to battery rated capacity, described self-discharge rate and described battery capacity；
Current impulse, the product that suppression cell voltage is delayed are periodically provided when described battery pack carries out micro-current working mode
Raw.
Lithium thionyl chloride cell group management method the most according to claim 4, it is characterised in that: gather described current signal
Time, use low-frequency sampling when described lithium thionyl chloride cell group is standby, during operation, use high frequency sampling.
Lithium thionyl chloride cell group management method the most according to claim 4, it is characterised in that: according to described remaining battery
Capacity obtains described battery pack and currently runs power consumption, and obtains battery life according to described current operation power consumption.
Lithium thionyl chloride cell group management method the most according to claim 6, it is characterised in that: according to current period place
Power consumption corresponding to m cycle in the time period obtains average power consumption, and described average power consumption currently runs merit as battery pack
Consumption；M is natural number.
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| CN109471036B (en) * | 2018-09-03 | 2020-12-29 | 北京必创科技股份有限公司 | Battery evaluation and early warning method for sensor network node |
| CN110542863A (en) * | 2019-08-23 | 2019-12-06 | 江西优特汽车技术有限公司 | Power battery self-discharge rate detection method |
| CN110542864A (en) * | 2019-08-23 | 2019-12-06 | 江西优特汽车技术有限公司 | Thermodynamic detection method for self-discharge rate of lithium ion battery |
| FR3108730B1 (en) | 2020-03-24 | 2022-04-22 | Accumulateurs Fixes | Method for determining in real time the lifetime of an electrochemical element of a battery |
| CN112180264B (en) * | 2020-09-25 | 2021-10-26 | 惠州亿纬锂能股份有限公司 | Electric quantity early warning method of composite battery pack |
| CN113552487B (en) * | 2021-06-24 | 2023-04-07 | 武汉昊诚锂电科技股份有限公司 | Self-discharge measurement and service life evaluation method of lithium secondary battery |
| CN113799613B (en) * | 2021-10-12 | 2022-04-15 | 河南嘉晨智能控制股份有限公司 | Braking energy feedback inhibition method for electric industrial vehicle |
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