CN105759219B - A kind of portable idle battery capacity measuring instrument - Google Patents
A kind of portable idle battery capacity measuring instrument Download PDFInfo
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- CN105759219B CN105759219B CN201610133728.0A CN201610133728A CN105759219B CN 105759219 B CN105759219 B CN 105759219B CN 201610133728 A CN201610133728 A CN 201610133728A CN 105759219 B CN105759219 B CN 105759219B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/382—Arrangements for monitoring battery or accumulator variables, e.g. SoC
- G01R31/3842—Arrangements for monitoring battery or accumulator variables, e.g. SoC combining voltage and current measurements
Abstract
The invention discloses a kind of portable idle battery capacity measuring instrument, including babinet, the control circuit in babinet, the control circuit measures and receiving real-time data, and correlation computations are rapidly completed, and show measurement result in analyses and comparison history library data.The test job of accumulator is rapidly completed using empirical equation in working software analysis of history library data and real-time data collection without offline electric discharge.The present invention scientifically solves present communications base station and increases severely and the contradiction in battery service measurement work, improves work efficiency, reduces risk, is energy-saving, can be that industry development makes important contribution, Instrument Design is light, can meet actual work requirements.
Description
Technical field
The present invention relates to a kind of battery capacity measuring instrument more particularly to a kind of portable idle battery capacity measurings
Instrument.
Background technology
With universal, the various communication equipments of cloud computing, the arrival in big data epoch, especially communications industry 3G, 4G technology
Room spreads all over town and country and is compared with the 2G epoch, it may be said that base station number is in geometric growth.Standby battery group is to ensure in computer room
The electric power life barrier of calculator room equipment normal operation, the online working condition of accumulator group directly influence the safety of communication network
Operation.Because provide every year will be to carrying out 2 times or more volume test inspections in the accumulator group of net work for the industry.
To the measurement method of accumulator：In the working environment for having standby battery group, it is ensured that site power supply will not occur
Accumulator group to be measured is detached from workload by the accident of interruption, is connected fictitious load electric discharge cabinet, is reconciled the electric current of electric discharge cabinet
Gear, the total power dissipation that 10 hour rates are carried out to battery are discharged, it is desirable that the voltage of accumulator group must not be less than operating voltage in 8 hours
Lower limiting value.The discharge voltage of every 5 minutes records one-shot battery groups and each monomer of staff is required in battery discharging, in this way
One work group, one day test assignment that can only arrange one group of battery.In addition, accumulator for a long time also can by heavy-current discharge
So that the environment temperature of constant temperature machine room is steeply risen, needs to open air-conditioning to computer room progress forced cooling, accumulator is released in test
Electric energy can not utilize, a large amount of electric energy will be lost in entire test process.
Still by the way of traditional 10 hour rate constant current off-networks electric discharge, electric discharge is set the detection mode of accumulator at present
Standby is ohmic load cabinet.Because discharge equipment is heavy（Discharge 30~70 kilograms of host, attachment and at least 20 kilograms of wiring of work,
One people can not complete work, and work group needs to be equipped with vehicle, including driver at least wants 3 people to configure）, the activity duration is long, city
Township's website passage is difficult, and some websites are also built in unfrequented mountain forest, adds the personnel reduction and enlargement of every profession and trade in recent years, dimension
Protect strength wretched insufficiency.10 hours batteries, which empty survey, to be held, and a large amount of electric energy has been lost, has affected the environment temperature of constant temperature machine room
It rises, while also reducing the effective of accumulator and using cycle life.
Invention content
It is an object of the invention to solve the problems, such as current techniques, a kind of portable idle electric power storage pool capacity is provided
Flowmeter.
In order to achieve the above objectives, the technology used in the present invention means are：A kind of portable idle accumulator capacity survey
Instrument, including babinet, the control circuit in babinet are measured, the control circuit measures and receiving real-time data, analyses and compares
History library data are rapidly completed correlation computations, and show measurement result, wherein formula performed in measuring is：
In formula：K is battery discharge coefficient, is provided by empirical historical data library in calculating；
VzThe final discharging voltage calculated by 2V single batteries；
C0For accumulator non-linear section capacity, C0=(t0+0.3)I；
a1For battery discharge voltage drop in 18 minutes to 24 minutes, a1= V18- V24；
a2For battery discharge voltage drop in 24 minutes to 30 minutes, a2= V24- V30；
D is battery discharge fall off rate, d=a2-a1=( V24- V30)-( V18- V24)；
I is t0~t30The average current of period, i.e. the workload average current of computer room；
t18Cell voltage declines 18 minutes time, corresponding voltage V from peak18 ；
t24Cell voltage declines 24 minutes time, corresponding voltage V from peak24 ；
t30Cell voltage declines 30 minutes time, corresponding voltage V from peak30 。
Further, the babinet uses Portable tool case, and 2 layers up and down are arranged in babinet, and control circuit is installed by lower layer, on
Layer places work measurement line, and the working panel with feature card interface is installed in the windowing of babinet one side.
Further, the control circuit includes main control module and the communication interface modules being connect with main control module, data
Memory module, time calendaring module, A/D conversion modules, alarm switch module, battery data acquisition module, interfacing expansion module,
And the power circuit of power supply is provided for each module.
Further, the control circuit is mounted in computer room, and the stationary monitoring module as computer room battery pack uses, and is
The online networking of regional base station data monitors.
Further, the U1 of the main control module uses microcontroller W77E058A40DL, the communication of communication interface modules
Chip uses MAX202, MAX1487, MAX1488, connects with the 10 foot RXD of U1,11 foot TXD, MAX202 is led to host computer
30 feet of letter, P00~P07 of U1, P20~P27 external data memory modules, U1 are ale signal, control tri-state latch chip
The LE terminals of 74HC373 latch least-significant byte addresses of the P00~P07 as external memory modules, as address A0~A7, P20
~P27 is the most-significant byte address of outer memory module, as address A8~A15, U1 by P00~P07 and outer memory module into
The historical data of row data exchange, acquisition can be stored in outer memory module or be uploaded directly into monitoring computer；The RD of U1 and
WR controls the data read-write operation of outer memory module and U1, and control tri-state is gone in the 1 foot output of RD and T1 access nor gates U3, U3
The LE of 8 latch U2, latches P20~P27, obtains 8 sub- CS1~CS8 of chip select terminal, for U1 to other units electricity
The control on road；U6 is 74HC138, it, into row decoding, generates 8 state control terminals to CS4~CS6, total for accumulator group
The acquisition control of voltage and total current；U4 is serial storage chip X5045, is used for the storage of device address and battery parameter
And setting, connect with P16, P17 under the control of CS1, P17 meets its clock SLK, P16 and meets its data line SI/SO；U5 is calendar
Chip DS1302 connects under the control of CS2 with P16, P17 of U1, and P16 meets the I/O of calendar chip, and P17 connects calendar chip
CLK, the accurate recording for completing module acquisition time and time setting, the external 3.6V lithium batteries of 8 feet carry out protecting electricity, to protect
Continue accurate timing after card module power-off；U7, U8 and U10 form 32 analog switching circuits together, and wherein U10 is CD4008,
P10~P13 and P14 carries out hardware sum operation, generates Q1~Q4, as the 4 bit address terminals of U7, the address terminal of U8 is direct
S1~S32 switching signals are generated in this way under the control of U1 with P10~P13, access JP1 optic electric interface modules, JP1 gradually will
32 battery tension signals are switched to X, Y terminal, and U12 is a piece of 4 double-pole analog selections switch, its X1Y2, X2Y1 divides
Not Lian Jie X, Y-signal, X0, Y0 connect total voltage signal, and X3, Y3 connect battery current signal, and U12 is completed under the control of P14, P15
Three kinds of monomer battery voltage, total voltage, battery current signals are transferred successively to U13, and U13 is a piece of 20 A/D converters,
The analog parameter of accumulator is converted into the digital signal that U1 can be identified, U13 accesses P16, P17 under the piece choosing of CS3, this
In P16 be the data-interface SDO, P17 of U13 be the clock interface SCLK of U13, CS7 is used as a path switching signal, is used for alarm call
Ring control.
The beneficial effects of the present invention are：On the basis of professional standard, in conjunction with accumulator conventional metered dose measurement method, carry
The work new departure for having gone out battery service measurement can directly use the workload of accumulator group in test, collected
Real time data carries out historical data by software and compares analysis, can be completed in a short time the quick test of accumulator, scene provides
Required working report, without any electric energy loss in entire test process.Scientifically solve 4G epoch communication base stations increase severely with
Battery service measures the contradiction in work, in terms of improving working efficiency, reducing work risk, reduction electric energy loss, will be
Industry development makes important contribution.In addition, the design of this patent device Host is light, meet that a people is portable enters the station, convenient for quick
Complete the on-line testing work of accumulator group.
Description of the drawings
The present invention is further elaborated with reference to the accompanying drawings and examples.
Fig. 1：The indicatrix of battery discharging in the embodiment of the present invention；
Fig. 2：Accumulator capacity report in the embodiment of the present invention；
Fig. 3：Accumulator real-time measuring data report in the embodiment of the present invention；
The circuit structure schematic diagram of Fig. 4, the present invention；
Fig. 5, control section circuit diagram of the present invention；
Fig. 6, AD converter partial circuit schematic diagram of the present invention；
Fig. 7, battery voltage acquisition partial circuit schematic diagram of the present invention；
The structural schematic diagram of Fig. 8, the present invention.
Specific implementation mode
Embodiment 1
As shown in figures 1-8, scene is online to each 0.5 hour real-time discharge curve of section accumulator concentrated collection, i.e., fixed
Justice is the indicatrix of battery discharging, obtains the data of some key testpoints, calls the data of similar accumulator history library
Multiple error comparison is carried out, the discharge coefficient K values of the battery is further determined that, is included in following formula and is calculated, calculated
Battery capacity measuring value.
The formula of accumulator capacity estimation on line：
In formula：K is battery discharge empirical coefficient；VzThe final discharging voltage calculated by 2V single batteries；
C0For the forward and backward non-linear section capacity of battery discharging, C0=t0 I0+0.3I ≈(t0+0.3)I；
a1For battery discharge voltage drop in 18 minutes to 24 minutes, a1= V18- V24；
a2For battery discharge voltage drop in 24 minutes to 30 minutes, a2= V24- V30；
D is the fall off rate of battery discharging voltage in the unit time, d=a2-a1=( V24- V30)-( V18- V24)；
I is t0~t30The average current of period, i.e. load current, I in calculating0It is accumulator initial drain, continues
Time it is shorter, for convenience of calculate can be replaced with I, error can be controlled in measure allow error range in.
t18Cell voltage declines 18 minutes time, corresponding voltage V from peak18 ；
t24Cell voltage declines 24 minutes time, corresponding voltage V from peak24 ；
t30Cell voltage declines 30 minutes time, corresponding voltage V from peak30 。
The peak of voltage recovery is found in battery discharging after five minutes, is defined as crest voltage point Vmax, and nothing is returned in electric discharge
The behindhand battery at peak, it is crest voltage point to pick and place piezoelectric voltage to decline at 5 minutes.Behindhand battery does not support peak-fall 0.5 hour
, in final voltage VZPlace, CIt surveysEqual to discharge capacity.When battery discharging was close to 0.5 hour, software can be according to above-mentioned public affairs
Formula calculates the measured value C of accumulator capacityIt surveys.If CIt surveysWhen more than nominal battery capacity, illustrate that accumulator capacity is full capacity
Or surpassed appearance, at this moment the upper limit magnitude of capacity once is set.Some tests can be effectively handled by these types of mode
In specific question so that measured value is approached actual value to reduce measurement error, improve the real effectiveness of measurement report.
It is noted that the stability of load current in work, it is desirable that the fluctuation of battery discharging electric current is less than ± 10%.
After battery capacity measuring value is calculated, current discharge capacity is subtracted, so that it may current to further determine that
The residual capacity of battery.That is CIt is surplus=CIt surveys-CIt puts
After the completion of waiting for that all accumulator individuals all calculate, the capacity report of this group of battery is locally produced, and in capacity report
Behindhand battery monomer is counted below table, provides the processing scheme of suggestiveness.
It records the conventional parameters such as the discharge voltage, electric current and temperature of accumulator in real time in measurement process, and generates real-time
Measurement data report, time scale can be edited freely, and this point will be compatible with traditional report, to facilitate experienced engineer
Carry out off line data analysis.Compared with prior art, the method that the present invention is handled using computer using formula and special case, in net
The accumulator of work carries out calculation of capacity and assessment, has adapted to the real work requirement in big data epoch in mode, in operation more
Add it is safe and efficient, it is time saving and energy saving.
The control circuit include main control module and the communication interface modules being connect with main control module, data memory module,
Time calendaring module, A/D conversion modules, alarm switch module, battery data acquisition module, interfacing expansion module and be each
Module provides the power circuit of power supply.
The U1 of the main control module uses microcontroller W77E058A40DL, the communication chip of communication interface modules to use
MAX202, MAX1487, MAX1488 connect with the 10 foot RXD of U1,11 foot TXD, and MAX202 is communicated with host computer, U1's
30 feet of P00~P07, P20~P27 external data memory module, U1 are ale signal, control tri-state latch chip 74HC373
LE terminals, latch least-significant byte addresses of the P00~P07 as external memory modules, as address A0~A7, P20~P27 is
The most-significant byte address of outer memory module, as address A8~A15, U1 carry out data by P00~P07 and outer memory module
It exchanges, the historical data of acquisition can be stored in outer memory module or be uploaded directly into monitoring computer；The RD and WR of U1 is controlled
8 locks of control tri-state are removed in the 1 foot output of the data read-write operation of outer memory module and U1, RD and T1 access nor gates U3, U3
The LE of storage U2, latches P20~P27, obtains 8 sub- CS1~CS8 of chip select terminal, for U1 to other element circuits
Control；U6 is 74HC138, it, into row decoding, generates 8 state control terminals to CS4~CS6, is used for accumulator group total voltage
With the acquisition control of total current；U4 is serial storage chip X5045, for device address and battery parameter storage and set
It sets, connects with P16, P17 under the control of CS1, P17 meets its clock SLK, P16 and meets its data line SI/SO；U5 is calendar chip
DS1302 connects under the control of CS2 with P16, P17 of U1, and P16 meets the I/O of calendar chip, and P17 meets the CLK of calendar chip,
Accurate recording for completing module acquisition time and time setting, the external 3.6V lithium batteries of 8 feet carry out protecting electricity, to ensure mould
Continue accurate timing after block power-off；U7, U8 and U10 form 32 analog switching circuits together, and wherein U10 is CD4008, and P10~
P13 and P14 carries out hardware sum operation, generates Q1~Q4, as the 4 bit address terminals of U7, the address terminal of U8 directly uses P10
~P13 generates S1~S32 switching signals in this way under the control of U1, accesses JP1 optic electric interface modules, JP1 is gradually by 32
Battery tension signal is switched to X, Y terminal, and U12 is a piece of 4 double-pole analog selections switch, its X1Y2, X2Y1 connects respectively
X, Y-signal are connect, X0, Y0 connect total voltage signal, and X3, Y3 connect battery current signal, and U12 completes monomer under the control of P14, P15
Three kinds of cell voltage, total voltage, battery current signals are transferred successively to U13, and U13 is a piece of 20 A/D converters, will be stored
The analog parameter of battery is converted into the digital signal that U1 can be identified, U13 accesses P16, P17, here P16 under the piece choosing of CS3
The data-interface SDO, P17 for being U13 are the clock interface SCLK of U13, and CS7 is used as a path switching signal, for alerting sound control
System.
The babinet of invention uses portable tool box, upper and lower 2 layers is arranged in babinet, control circuit board, upper layer are installed by lower layer
Work measurement line is placed, box back surface windowing installation has the working panel of feature card interface, general assembly public less than 3 for weight
Jin, volume are 26cm × 17cm × 18cm, and this chassis design thought of the invention is to mitigate a line battery service people
The working equipment of member, reduces the personnel depaly of work group, a personal portable is facilitated to enter the station in work, storage is reduced from source
The personnel cost and vehicle cost of battery testing work.It is logical in various regions after portable idle battery capacity measuring instrument is released
Letter department has carried out test repeatedly comparative with traditional approach, and test result is accurate, and user's evaluation is good.
Embodiment 2
The base station storage batteries group test of the farms commmunication company of the cities XX XXX
Testing time：On October 25th, 2014
Test purpose：In order to verify the accuracy of portable idle battery capacity measuring instrument.Test is compared in participation
Instrument is traditional discharge load instrument.
Mesuring battary：Double boards 24 of stepping on save 2V monomer 500AH48V accumulator groups
Test job is embodied：The traditional working method of the battery service person of commmunication company（I.e. 10 hours permanent electricity
Banish electricity）, off-network test is carried out to accumulator with load meter, discharge current is set as 50A, our technician will be portable idle
Consumption battery capacity measuring instrument is simultaneously and machine is detected.
Both persons carry out test job wiring to accumulator group respectively, in 12：24 start battery power discharge, both sides' instrument
Record discharge data in real time.Portable idle battery capacity measuring instrument lasts 41 minutes 13：05 completes test assignment, existing
Field has automatically generated relevant testing journal sheet.Conventional load instrument continues to test, and lasts up to more than 9 hours, and just being completed to night should
The test assignment of group battery, data are provided by commmunication company maintenance personnel oneself.This accumulator capacity test and comparison such as following table：
Compare conclusion：The capacity of the accumulator group of opposite 500AH, instrument of the present invention and conventional instrument in each single battery
Error is less than 1% on measured value.The instrument used time of the present invention only has 41 minutes, without electric energy loss, conventional load instrument used time 9 in measurement
A more hours, accumulator group is carried out to empty electric discharge completely, electric energy loss is up to 100%.Various battery capacity measurings in practice
The measured value of instrument has certain difference, and therefore, industry provides that the online spare capacity of accumulator must not be less than the 80% of nominal value
As qualified accumulator.The measured value of instrument of the present invention and traditional instrument is differed less than 1%, it is contemplated that both sides' different operation
On influence, measured value can be described as equal.
Embodiment 3
Referring to attached drawing 2, attached drawing 3, base station storage batteries testing journal sheet in the cities XX new one.
It instrument of the present invention 40 minutes used times in current measure, does not tear piece electric wire of website in measurement open, does not revolve website one
Screw smoothly completes whole test assignments, and scene automatically generates attached drawing 2,3 working report of attached drawing, while preserving in measurement
Real time data, meets user and works offline and search.
In face of the 4G communication eras of high speed development, the quantity of communication site rapidly increases, and is singly China Mobile's core at present
Website just has more than 70 ten thousand, can not count more than small base station number, the basic nothing of the offline 10 hours measurement methods of traditional accumulator
Method completes annual 2 test jobs.In addition, the energy-saving operation index of every profession and trade is increasingly severe, traditional accumulator is surveyed
A large amount of electric energy will be lost in amount mode every year.The product of the present invention can be accomplished in battery maintenance measurement：Meet a people just
It takes and enters the station, complete to include that cable is connected to interior whole test jobs under conditions of devoid of risk Non-energy-consumption, in 1 hour.The present invention
The popularization and application of achievement can be that industry development makes great contribution.
Application embodiment is only intended to illustrate that technical characteristic disclosed in the present application, those skilled in the art pass through simple
Carried out change is replaced, the range that the application is protected is still fallen within.
Claims (5)
1. a kind of portable idle battery capacity measuring instrument, including babinet, the control circuit in babinet, the control
Correlation computations are rapidly completed, and show measurement result in circuit measuring processed and receiving real-time data, analyses and comparison history library data,
Performed formula is in wherein measuring：
In formula：K is battery discharge coefficient, is provided by empirical historical data library in calculating；
Vz presses the final discharging voltage that 2V single batteries calculate；
C0 is accumulator non-linear section capacity, C0=(t0+0.3) I；
A1 is battery discharge voltage drop in 18 minutes to 24 minutes, a1=V18- V24；
A2 is battery discharge voltage drop in 24 minutes to 30 minutes, a2=V24- V30；
D is battery discharge fall off rate, d=a2-a1=(V24- V30)-(V18-V24)；
I is the average current of t0~t30 periods, i.e. the workload average current of computer room；
The time of t0 battery dischargings 5 minutes, corresponding crest voltage point Vmax；
T18 cell voltages decline 18 minutes time, corresponding voltage V18 from peak；
T24 cell voltages decline 24 minutes time, corresponding voltage V24 from peak；
T30 cell voltages decline 30 minutes time, corresponding voltage V30 from peak.
2. portable idle battery capacity measuring instrument according to claim 1, it is characterised in that：The babinet uses
Portable tool case, 2 layers up and down of the interior setting of babinet, control circuit is installed by lower layer, and work measurement line is placed on upper layer, and babinet one side is opened
Window installs the working panel with feature card interface.
3. portable idle battery capacity measuring instrument according to claim 1, it is characterised in that：The control circuit
Communication interface modules, data memory module, time calendaring module, the A/D being connect including main control module and with main control module are converted
Module, alarm switch module, battery data acquisition module, interfacing expansion module and the power supply electricity that power supply is provided for each module
Road.
4. portable idle battery capacity measuring instrument according to claim 1, it is characterised in that：The control circuit
In computer room, the stationary monitoring module as computer room battery pack uses, for the online networking monitoring of regional base station data.
5. portable idle battery capacity measuring instrument according to claim 3, it is characterised in that：The control circuit
Main control module U1 use chips W 77E058, the communication chip of communication interface modules to use MAX202, MAX1487, MAX1488,
Connect with the 10 foot RXD of U1,11 foot TXD, MAX202 is communicated with host computer, the external number of P00~P07 of U1, P20~P27
According to memory module, 30 feet of U1 are ale signal, and the LE terminals of control tri-state latch chip 74HC373 latch P00~P07 and make
For the least-significant byte address of external memory modules, as address A0~A7, P20~P27 is the most-significant byte address of outer memory module,
As address A8~A15, U1 carry out data exchange by P00~P07 and outer memory module, and the historical data of acquisition can be stored in
In outer memory module or it is uploaded directly into monitoring computer；The reading and writing data of RD and WR the control outer memory module and U1 of U1
The LE of 8 latch U2 of control tri-state is removed in the 1 foot output of operation, RD and T1 access nor gates U3, U3, is locked to P20~P27
It deposits, obtains 8 sub- CS1~CS8 of chip select terminal, be used for controls of the U1 to other element circuits；U6 is 74HC138, it to CS4~
CS6 generates 8 state control terminals into row decoding, is used for the acquisition control of accumulator group total voltage and total current；U4 is serial
Memory chip X5045, be used for device address and battery parameter storage and setting, under the control of CS1 with P16, P17 phase
It connects, P17 meets its clock SLK, P16 and meets its data line SI/SO；U5 is calendar chip DS1302, with U1's under the control of CS2
P16, P17 connect, and P16 meets the I/O of calendar chip, and P17 meets the CLK of calendar chip, for completing the accurate of module acquisition time
It records and time setting, the external 3.6V lithium batteries of 8 feet carries out protecting electricity, to ensure to continue accurate timing after module powers off；U7、U8
Forming 32 analog switching circuits together with U10, wherein U10 is CD4008, and U7, U8 are 16 analog switch chips, P10~
P13 and P14 carries out hardware sum operation, generates Q1~Q4, as the 4 bit address terminals of U7, the address terminal of U8 directly uses P10
~P13 generates S1~S32 switching signals in this way under the control of U1, accesses JP1 optic electric interface modules, JP1 is gradually by 32
Battery tension signal is switched to X, Y terminal, and U12 is a piece of 4 double-pole analog selections switch, its X1Y2, X2Y1 connects respectively
X, Y-signal are connect, X0, Y0 connect total voltage signal, and X3, Y3 connect battery current signal, and U12 completes monomer under the control of P14, P15
Three kinds of cell voltage, total voltage, battery current signals are transferred successively to U13, and U13 is a piece of 20 A/D converters, will be stored
The analog parameter of battery is converted into the digital signal that U1 can be identified, U13 accesses P16, P17, here P16 under the piece choosing of CS3
The data-interface SDO, P17 for being U13 are the clock interface SCLK of U13, and CS7 is used as a path switching signal, for alerting sound control
System.
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| CN102854471A (en) * | 2012-09-06 | 2013-01-02 | 北京百纳威尔科技有限公司 | Method and device for metering electric quantity of battery |
| CN105093117A (en) * | 2014-05-12 | 2015-11-25 | 通用汽车环球科技运作有限责任公司 | Systems and methods for determining battery system power capability |
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