BATTERY IMPEDANCE METER BT4560

BATTERY IMPEDANCE METER BT4560
Component measuring instruments
Determine Li-ion battery reliability in just 10 seconds
Low-frequency AC-IR measurement without charging/discharging substantially reduces
the time needed to inspect the internal resistance of battery cells.
2
Incomparable Speed
Exceptional Accuracy
Unsurpassed Stability
Fast
Low-frequency AC-IR measurement enables faster measurement
No need to charge/discharge
Traditionally, the internal resistance of battery
cells is measured by pre-charging the battery,
then passing large currents and measuring the
voltage drop (DC-IR measurement).
Pre-charging the battery, however, usually takes
several minutes to several tens of minutes.
The BT4560 eliminates the need for charging
or discharging by measuring the internal impedance at a low frequency of 1 Hz or below (AC-IR
measurement), enabling significant reduction in
the time required for measuring battery cells.
Difference in speed
Comparison of time taken to measure battery cell internal resistance
DC-IR measurement (conventional method)
Requires 20 to 30 minutes to around one hour,
including charging/discharging
AC-IR measurement (using BT4560)
Requires around 10 seconds*
* When measuring at a frequency of 1 Hz
3
The BT4560 Battery Impedance Meter substantially reduces the time required for inspecting Li-ion battery
cells by measuring at low frequencies, providing a fast and accurate measurement of the battery status.
Accurate, stable measurements
High reliability guaranteed through proven performance
Measure very low impedance
3 mΩ minimum range with high noise suppression
Accuracy: ±0.4% rdg. ±8 dgt.*
Minimum resolution: 0.1 μΩ
* When pure resistance is measured with measurement speed set to [SLOW]
Compared to the current used by traditional
battery testers, 0.1A,
the BT4560 uses a current 15 times stronger,
1.5 A, which improves
the S/N ratio.
Enhanced noise suppression enables the device to
provide reliable measurements for low-impedance
batteries used for hybrid and plug-in hybrid vehicles.
Circuit configuration highly tolerant of contact resistance
The circuit configuration in the BT4560 is not susceptible to contact and wire resistance, enabling
stable measurement. Probe cables of up to 4 m are
supported, improving the flexibility of cabling in production lines.
Measure DC voltage with high accuracy
Voltage measurement accuracy comparable to high-end testers
Accuracy: ±0.0035% rdg. ±5 dgt.
Minimum resolution: 10 μV
The BT4560 can measure the voltage much
more accurately than
traditional resistance
meters(±0.01% rdg.
±3 dgt.).
It guarantees highly accurate voltage measurement
where greater accuracy than that of previous machines is required.
Measure without damaging batteries
The BT4560 employs AC-IR measurement with
a small current load, enabling highly reliable measurement without damaging batteries.
Two types of dedicated probes for different purposes
Dedicated probes with four-terminal structure enables stable measurement unaffected by environmental noise or cabling.
CLIP TYPE PROBE L2002
PIN TYPE PROBE L2003
For measuring laminated sheet batteries
For line-embedded applications and various other types of batteries
Threaded holes
are provided to
secure the probe
on an inspection
fixture.
Adjust the point of contact
by sliding a stopper.
* Contact your local Hioki distributor for details of the probe tip shapes.
4
ical
n
h
c
e
T
sis
y
l
a
n
A
An alternative measurement method for inspecting charging/discharging
output characteristics (DC-IR) [Low-frequency AC-IR measurement]
Information obtained by low-frequency measurement
Electrochemical characteristics of a battery and Cole-Cole plot
Conceptual diagram of
Load
a battery
Positive
Battery equivalence circuit
Negative
electrode
electrode
e-
R1
Ion movement in electrolyte
(electrolyte resistance)
Approx. 1 kHz
Li +
Li +
Li +
Electrolyte
resistance
Li +
Chemical reaction on electrode surface (reaction resistance): approx. 1 Hz
Imaginary part
High-frequency
region
Low-frequency
region
0
R2
0
Reaction
resistance
Two-point measurement at high and low frequencies
Cole-Cole Plot
R1
R2
Measurement at low frequency reveals
the reaction resistance of the battery
Lithium ions move between electrodes through the electrolyte
-X
C
R
Real part
Traditional battery testers only record the electrolyte resistance of the battery by measuring it at a
frequency of 1 kHz. Measurement at a low frequency
of around 1 Hz, however, enables the tester to also
observe the reaction resistance on the surface of
the electrodes.
The BT4560 assures the quality of battery cells by
investigating both electrolyte resistance and reaction resistance with a two-point measurement at
high and low frequencies. In this way, it helps to improve quality and extend the service life of lithium
ion battery modules.
Correlation between DC-IR measurement and low-frequency AC-IR measurement
DC-IR measurement
Load current
T
Method whereby a DC
load is put through
the battery, and the
resistance is calculated from the voltage
variation that occurs.
*
140.0
D
B
E
C
F
0
R1
80.0
60.0
40.0
[Correlation coefficient R2=0.94]
20.0
0.0
When the correlation between DC-IR and AC-IR
measurements is plotted
using multiple Li-ion batteries ....
Response derived from slow reactions
250.0
100.0
Method whereby an
AC signal is applied
to the battery to
measure its impedR ance.
R1+R 2
Response derived from fast reactions
1 kHz
120.0
AC-IR [mΩ]
A
X
AC-IR [mΩ]
Battery voltage
E0
AC-IR measurement
1 Hz
200.0
150.0
100.0
50.0
[Correlation coefficient R2=0.99]
0.0
0.0
50.0
100.0
150.0
200.0
DC-IR [mΩ]
250.0
300.0
0.0
50.0
100.0
150.0
200.0
DC-IR [mΩ]
250.0
300.0
A strong correlation is found between the measured values of DC-IR and
Useful as an alternative to DC-IR testing
low-frequency AC-IR.
5
Characteristics and features of BT4560
All-in-one compact unit
Simultaneous measurement of impedance and voltage
The BT4560 requires no loading devices and provides measurements simply as a stand-alone unit, without having to establish a
complicated measurement system.
Reduce tact time by simultaneously providing impedance measurement and highly accurate DC voltage measurement.
Slope correction function*
Self-calibration
Correct any offset voltage and gain drift that may be present in the
circuit to improve the accuracy of voltage measurement.
Sample delay*
Specify a delay between AC voltage being applied and sampling being
started so that measurement can start after the response stabilizes.
Prevent charging or discharging when AC voltage is applied*
To prevent the battery that is being measured from charging or
discharging, the battery impedance meter terminates the applied
measurement signal when zero is crossed.
If measurement signals drift due to the battery characteristics or
the input impedance of measurement instrument, the tester applies correction to the linear drift.
Temperature measurement
Reaction resistance measured at low frequency is sensitive to
temperature.
An optional temperature sensor measures the temperature around
the battery and associates the results with data, thereby improving
the reliability of the measurements.
*Functions available during impedance measurement
Create Cole-Cole plots using bundled software
The BT4560 comes with a free PC application that can be used for measurement and drawing Cole-Cole plots.
You can also select the desired measurement frequency or export the measured values in text format.
Cole-Cole plot drawing screen
Measurement screen
Cole-Cole plot data
6
Embed in automated machines and production lines
330 mm
80 mm
RS-232C
NPN/PNP
switch for
EXT. I/O
USB
(for PC connection)
EXT. I/O
Functions suitable for automated machines
Contact check
Monitor the contact resistance of
the probe before and after measurement so that the measurement
will only start when the measuring
electrode on the probe is in contact
with the object to be measured.
Comparator
• Simultaneously measure
impedance and voltage
• Output overall determination
results
• Use the two-tone buzzer to
indicate determination results
Panel saving and loading
Store up to 126 sets of measurement conditions in internal memory so that they
can be called through EXT.
I/O for future measurements.
NPN/PNP switch
Switch the input/output circuits for EXT. I/O according to
the type of output: current sink output (NPN) or current
source output (PNP).
External control input/output terminal (EXT. I/O)
19 18 17 16 15 14 13 12 11 10 9
8
7
6
5 4
3
2
1
37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20
Pin
Signal name
I/O
Functionality
1
START (TRIG)
IN
Starts measurement (external trigger)
2
0 ADJ_ALL
IN
All-zero adjustment
3
STOP
IN
Stops measurement
4
LOAD 1
IN
Load number bit 1
5
LOAD 3
IN
Load number bit 3
6
LOAD 5
IN
Load number bit 5
7
Not used
-
-
8
ISO_5V
-
Isolated power supply +5 V (-5 V) output
Isolated power supply common
9
ISO_COM
-
10
ERR
OUT
Measurement error
11
RorZ_HI
OUT
Resistance determination result is Hi, impedance determination result is Hi
12
RorZ_LO
OUT
Resistance determination result is Lo, impedance determination result is Lo
14
Xorθ_HI
OUT
Reactance determination result is Hi, phase angle determination result is Hi
13
V_IN
OUT
Voltage determination result is IN
15
Xorθ_LO
OUT
Reactance determination result is Lo, phase angle determination result is Lo
16
Not used
-
-
17
Not used
-
-
18
PASS
OUT
The determination result passed
19
Not used
-
-
20
0 ADJ_SPOT
IN
Spot zero adjustment
21
CAL
IN
Self-calibration
22
LOAD 0
IN
Load number bit 0
23
LOAD 2
IN
Load number bit 2
24
LOAD 4
IN
Load number bit 4
25
LOAD 6
IN
Load number bit 6
26
Not used
-
-
27
ISO_COM
-
Isolated power supply common
28
EOM
OUT
End of measurement
29
INDEX
OUT
Measurement reference signal
30
RorZ_IN
OUT
Resistance determination result is IN, impedance determination result is IN
31
V_HI
OUT
Voltage determination result is Hi
32
V_LO
OUT
Voltage determination result is Lo
33
Xorθ_IN
OUT
Reactance determination result is IN, phase angle determination result is IN
34
Not used
-
-
35
Not used
-
-
36
Not used
-
-
37
FAIL
OUT
The determination result failed
7
Accuracy specifications
■ Impedance measurement accuracy
○ 3 mΩ range (0.1 Hz to 100 Hz), 10 mΩ range, 100 mΩ range
R accuracy = ± (0.004 |R| + 0.0017 |X| ) [mΩ] ± α
X accuracy = ± (0.004 |X| + 0.0017 |R| ) [mΩ] ± α
(The units of R and X are [mΩ]. α is as shown in the table below.)
Z accuracy = ± 0.4% rdg. ± α ( |sinθ| + |cosθ| )
α
θ accuracy = ± 0.1° ± 57.3 Z ( |sinθ| + |cosθ| )
(α is as shown in the table below.)
○ 3 mΩ range (110 Hz to 1050 Hz)
R accuracy = ± (0.004 |R| + 0.0052 |X| ) [mΩ] ± α
X accuracy = ± (0.004 |X| + 0.0052 |R| ) [mΩ] ± α
(The units of R and X are [mΩ]. α is as shown in the table below.)
Z accuracy = ± 0.4% rdg. ± α ( |sinθ| + |cosθ| )
α
θ accuracy = ± 0.3° ± 57.3 Z ( |sinθ| + |cosθ| )
(α is as shown in the table below.)
3 mΩ range
10 mΩ range
100 mΩ range
25 dgt.
60 dgt.
60 dgt.
15 dgt.
30 dgt.
30 dgt.
8 dgt.
15 dgt.
15 dgt.
R: ± R accuracy × 0.1 / °C, X: ± X accuracy × 0.1 / °C,
Z: ± Z accuracy × 0.1 / °C, θ: ± θ accuracy × 0.1 / °C,
FAST
MED
SLOW
α
Temperature coefficient
(Applied in the ranges of 0 °C to 18°C and 28°C to 40 °C)
Accuracy graph
3 mΩ range (110 Hz to 1050 Hz)
2.0
1.8
1.8
1.6
Accuracy [% rdg.]
Accuracy [% rdg.]
3 mΩ range (0.1 Hz to 100 Hz) , 10 mΩ range, 100 mΩ range
2.0
1.4
1.2
1.0
0.8
0.6
0.4
X
0.2
0.0
−180
R
−90
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
Phase [°]
90
180
Impedance accuracy excluding α (0.004|R|+0.0017|X|, 0.004|X|+0.0017|R|)
■ Voltage measurement accuracy
V
Voltage accuracy
Temperature coefficient
Temperature coefficient
−90
R
0
Phase [°]
90
180
Impedance accuracy excluding α (0.004|R|+0.0052|X|, 0.004|X|+0.0052|R|)
(when self-calibration is performed)
Display range
−5.10000 V to 5.10000 V
Resolution
10 μV
FAST
±0.0035% rdg. ±5 dgt.
MED
±0.0035% rdg. ±5 dgt.
SLOW
±0.0035% rdg. ±5 dgt.
±0.0005% rdg. ±1 dgt. /°C (applied in the ranges of 0°C to 18°C and 28°C to 40°C)
■ Temperature measurement accuracy
Accuracy
0.0
−180
X
v
±0.5°C (measurement temperature: 10.0°C to 40.0°C) ±1.0°C (measurement temperature: -10.0°C to 9.9°C, 40.1°C to 60.0°C)
Temperature coefficient: ±0.01°C/°C (applied in the ranges of 0°C to 18°C and 28°C to 40°C)
BT4560 specifications
Measured signals
(Guaranteed accuracy period: 1 year)
Impedance, voltage, temperature
Impedance measurement
Measurement parameters
Measurement frequency
R resistance, X reactance, Z impedance, θ phase angle
0.1 Hz to 1050 Hz
Frequency setting
resolution
0.10 Hz to 0.99 Hz in 0.01-Hz increments
1.0 Hz to 9.9 Hz in 0.1-Hz increments
10 Hz to 99 Hz in 1-Hz increments
100 Hz to 1050 H z in 10-Hz increments
Measurement ranges
3.0000 mΩ, 10.0000 mΩ, 100.000 mΩ
Measurement functions (R,X,V,T)/(Z,θ,V,T)/(R,X,T)/(Z,θ,T)/( V,T)
Comparator, self-calibration, sample delay, average,
voltage limit, potential gradient compensation
for impedance measurement, charge/discharge
Function
prevention during AC signal application, key lock,
system test, panel saving and loading (up t o 126
condition sets)
Measurement error Contact check, measurement current error, voltage drift
detection
on measured object, overvoltage input, voltage limit
RS-232C/USB (virtual COM port) * Cannot be used
Interface
simultaneously
Transmission speed: 9,600 bps/19,200 bps/38,400 bps
Measurement current/DC load (DC load: offset current applied to measured object during impedance measurement)
Measurement current
DC load current
3 mΩ range
1.5 Arms ±10%
1 mA or less
10 mΩ range
500 mArms ±10%
0.35 mA or less
Measurement wave number
FAST
1 wave
2 waves
8 waves
0.10 Hz to 66 Hz
67 Hz to 250 Hz
260 Hz to 1050 Hz
100 mΩ range
50 mArms ±10%
0.035 mA or less
MED
2 waves
8 waves
32 waves
SLOW
8 waves
32 waves
128 waves
Voltage measurement
Measurement range 5.00000 V (single range)
Resolution
10 μV
FAST : 0.1 s
* When self-calibration is performed,
Measurement time MED : 0.4 s 0.21 s is added to the measurement time.
SLOW : 1.0 s
Temperature measurement
Display range
Resolution
Measurement time
-10.0 °C to 60.0 °C
0.1 °C
2.3 s
TRIG, LOAD, Hi, IN, Lo, and others
(NPN/PNP can be switched)
EXT. I/O
Allowable input voltage Up to 5 V
Operating temperature
0 °C to 40 °C, 80% rh or less (no condensation)
and humidity range
Storage temperature
-10 °C to 50 °C, 80% rh or less (no condensation)
and humidity range
Operating environment Indoor, pollution degree 2, altitude up to 2,000 m
Power supplies
Rated supply voltage: 100 to 240 VAC
Rated supply frequency: 50/60 Hz
Rated power
80 VA
Dielectric strength
1.62 kVAC, 1 min, cutoff current 10 mA
(Between power supply terminal lump and protective ground)
Applicable standards
Safety: EN61010
EMC: EN61326, EN61000-3-2, EN61000-3-3
Dimensions and mass
Approx. 330W × 80H × 293D mm (12.99W × 3.15H
× 11.54D in), Approx. 3.7 kg (130.5 oz)
Accessories
Power cord ×1, instruction manual ×1, zero-adjustment board ×1, USB cable (A-B type) ×1, CD-R
(communication instruction manual, PC application
software, USB driver) ×1
Instrument
BATTERY IMPEDANCE METER BT4560
Standard accessories
Power cord, Instruction manual,
Zero-adjustment board, USB cable, CD-R
12 mm
6.3 mm
f1.3
mm
9.15 mm
Options
f1.8
mm
2.5
mm
CLIP TYPE PROBE L2002
Cable length : 1.5 m
PIN TYPE PROBE L2003
Cable length : 1.5 m
TEMPERATURE SENSOR Z2005
Cable length : 1 m
RS-232C CABLE 9637
Cable length : 1.8 m
Note: Company names and Product names appearing in this catalog are trademarks or registered trademarks of various companies.
HIOKI (Shanghai) SALES & TRADING CO., LTD.
TEL +86-21-63910090 FAX +86-21-63910360
http://www.hioki.cn / E-mail: info@hioki.com.cn
DISTRIBUTED BY
HIOKI INDIA PRIVATE LIMITED
TEL +91-124-6590210 FAX +91-124-6460113
HEADQUARTERS
E-mail: hioki@hioki.in
81 Koizumi, Ueda, Nagano, 386-1192, Japan
TEL +81-268-28-0562 FAX +81-268-28-0568 HIOKI SINGAPORE PTE. LTD.
http://www.hioki.com / E-mail: os-com@hioki.co.jp TEL +65-6634-7677 FAX +65-6634-7477
E-mail: info-sg@hioki.com.sg
HIOKI USA CORPORATION
HIOKI KOREA CO., LTD.
TEL +1-609-409-9109 FAX +1-609-409-9108 TEL +82-42-936-1281 FAX +82-42-936-1284
http://www.hiokiusa.com / E-mail: hioki@hiokiusa.com E-mail: info-kr@hioki.co.jp
All information correct as of Nov. 17, 2014. All specifications are subject to change without notice.
BT4560E1-4YM
Printed in Japan