High-Rate Battery Tester

TesterPFX2731S

Supports single-cell evaluation for all-solid-state batteries, lithium-ion batteries, etc.

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Product Overview

Enables high-rate charge/discharge tests necessary for enhanced rapid charge/discharge performance.

The PFX2731S is a 6 V-20 A 6-channel battery tester that supports high-rate charge/discharge tests. It is operated with the application software BPChecker4000, which is exclusive to the PFX2731S. As one PC can operate up to 4 units (24 channels), one can construct a multi-channel charge/discharge system according to the required number of channels.In order to safely conduct long-term continuous testing, it also has 2-system independent protection functions for hardware and software, as well as various protection functions such as a connection confirmation function that detects incorrect wiring and integrated capacity protection.

Features

Key Features

10ms 連続計測（最速設定時）
単セル評価に対応（Cレートで設定可能）
多彩な充放電モード（計9モード）
- 充電：CC、CC-CV、CP、CP-CV
- 放電：CC、CC-CV、CP、CP-CV
- パターン充放電（CC（+CV）、CP（+CV）

経路スイッチ内蔵により、異常検出時に速やかに試験を中断
恒温槽（エスペック社製）4台との同期運転が可能
T型熱電対（オプション）による温度計測が可能
LANケーブルを接続するだけでシステム構築が可能
充実の保護機能

System Configuration

Example: One PFX2731S unit connected via LAN cable

Example: Four PFX2731S units and four temperature chambers* connected via LAN cable

*Connection to temperature chambers can be either LAN or RS485. When using RS485, a separate USB converter is required for connection to the PC.

The PFX2731S integrates a control section, measurement section, and six 6V-20A charge/discharge channel units in a single chassis, enabling construction of a charge/discharge system with up to 24 channels in a space-saving configuration. Each channel is completely isolated, and measurement functions are equipped for each individual channel, allowing continuous data recording at 10 ms intervals across all channels.

CC Charging

Dedicated constant-current charging. Supports -dV detection and battery temperature-based -dT/dt detection.

CC Discharge

It is a general constant current discharge. Termination by capacity (Ah) is another option in addition to voltage and battery temperature.

CC-CV Charge

This charge method switches from constant current to constant voltage automatically. It supports CV time and It current detection.

CC-CV Discharge

This discharge method switches from constant current to constant voltage automatically.
It supports CV time and It current detection. Since it is capable of a deeper discharge than the CC discharge profile, it can be used for high-precision discharge capacity measurement.

CP Charge

New Features

It is only for constant power recharging. The limit current can be used to limit the discharge current if the voltage drops and the discharge current increases. Termination by capacity (Ah) is another option in addition to voltage and battery temperature.

CP Discharge

CP-CV Charge

New Features

This charge method switches from constant power to constant voltage automatically. It supports CV time and It current detection.

CP-CV Discharge

This discharge method switches from constant power to constant voltage automatically.
It supports CV time and It current detection. Since it is capable of a deeper discharge than the CP discharge profile, it can be used for high-precision discharge capacity measurement.

Pattern charging/discharging: (CC(+CV), CP(+CV))

New Features

A pattern is a series of steps. A maximum of 100,000 steps of CC or CP charge/discharge can be switched at high speed. More advanced pattern control is supported because the CV voltage can be adjusted for each step. Even if there are many steps, like in a standard test’s pattern charge/discharge and simulation pattern, Excel can be used to input the data.

Pattern charging/discharging: (CC(+CV), CP(+CV))

Fully Independent Operation for All Channels

Since each channel is fully independent, it can be controlled using various timings and test conditions.

100,000-step pattern charge/discharge function

The CC/CP step value can be set up to 100,000 steps. The time width can be set from 100 ms to 999.9 s per step. Furthermore, because the CV voltage can be set for each step, it is possible to handle complex charge/discharge tests with flexibility, including test patterns for a variety of standard tests and simulation patterns.

The C-rate setting function makes changing complex test conditions simple

To accommodate the diversifying requirements of charge/discharge tests, the C-rate setting function has been implemented. The charge/ discharge current value of the profile can be set with the C-rate value based on the nominal capacity input value. As a result, the test conditions can be applied to all profiles by simply changing the nominal capacity input value when testing different battery types with the same C-rate conditions and test pattern.

Test Condition Editor* See P5 Application Software
Since C-rate conversion is based on the nominal capacity value, all test conditions can be changed simply by modifying the nominal capacity value.

High-speed Data Sampling

The measurement of voltage and current is performed using a 24bit A/D converter. Continuous data collection of 10ms is possible for all channels. (The data recording time can be selected between 10 ms, 100 ms, and 1 s.) Setting the delta voltage and delta current also makes it possible to collect data even when the voltage or current exceeds the set value. *Specifying a short time setting increases the amount of recorded data. The amount of data will be in the thousands to tens of thousands if the test time is long (several hours or longer). Be sure to set it carefully.

Enables high-precision measurement

Battery voltage and charge/discharge current are accurately detected by a built-in high-precision measurement circuit. (Voltage measurement: 100 μV resolution, current measurement: 100 μA resolution)(Current measurement: 100 μA resolution at 20 A range, 10 μA resolution at 2 A range)

Enhanced protection functions

Protection functions like overcharge and overdischarge are built into the hardware and software. Additionally, the main unit has a builtin path switch and a high-speed shutdown function that instantly terminates the test when an abnormality is detected.

Main items and setting ranges of protection settings

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Hardware
Hardware Overvoltage Protection (HOVP)	0.000 V to 6.300 V
Hardware Undervoltage Protection (HUVP)	-1.100 V to 5.700 V
Hardware Overcurrent Protection (HOCP_Low Range)	0.000 A to 2.100 A
Hardware Overcurrent Protection (HOCP_High Range)	0.000 A to 21.000 A

Software
Software Overvoltage Protection (SOVP)	0.000 V to 6.300 V
Software Undervoltage Protection (SUVP)	-1.100 V to 5.700 V
Software Overcharge Ampere Protection (SOAH)	1.0000 Ah to 2000.0000 Ah
Software Overtemperature Protection (SOTP)	-100 °C to 400 °C
Charge Overcurrent Protection (Charge OCP_Low Range)	0.000 A to 2.100 A
Charge Overcurrent Protection (Charge OCP_High Range)	0.000 A to 21.000 A
Discharge Overcurrent Protection (Discharge OCP_Low Range)	-2.100 A to 0.000 A
Discharge Overcurrent Protection (Discharge OCP_High Range)	-21.000 A to 0.000 A
Over SOC Charge Rate (Over SOC)	0.00 % to 150.00 %
Under SOC Charge Rate (Under SOC)	0.00 % to 10.00 %

Conditions for Various Charge/Discharge Cutoffs

In addition to voltage, time and temperature, It current value and SOC can also be used to set the charge termination condition and discharge termination condition.

Convenient Scheduling of the Pause Function

Pauses can be scheduled during tests to stop at a specified cycle. After the pause, the test can be resumed from any point.

Resuming a test from any point

It is possible to resume the test from any point if it is interrupted due to a power outage, an alarm going off, or user action.

Easy Firmware Update

Downloading the firmware updater from our website will allow the PFX2731S’s firmware to be updated to the most recent version.

Protection settings can be configured for each profile.

Protection settings can be configured for each profile, taking precedence over the general test conditions protection settings. When profile protection is on, any conflicting protection settings in the general settings are disabled.
Example: If “SOVP” is configured under profile protection, the “SOVP” setting in the general settings will be disabled while that profile is running.

SD035-PFX BPChecker4000

The BPChecker4000 allows the conditions for battery charge/discharge characteristic tests to be set, tests to be carried out, and the test results to be stored. BPChecker4000 consists of two programs, the Test Condition Editor and the Test Executive, which create and run tests respectively.

SD035-PFX BPChecker4000

Creating and Editing Test Conditions

In BPChecker4000, a set of test conditions is called a project. Each project contains sequences and profiles. A sequence is a collection of profiles. A profile determines how the battery is charged and discharged.

Appearance

Back Panel

Specifications

PFX2731S_Rated output

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Item		Specifications
Number of outputs		6 ch (per frame)
Isolation		Between channels, Ch-chassis
Charge current range	2A range	0.0000 A to 2.0000 A
Charge current range	20A range	0.000 A to 20.000 A
Charge voltage range		-1.000 V to 6.000 V
Discharge current range	2A range	0.0000 A to 2.0000 A
Discharge current range	20A range	0.000 A to 20.000 A
Discharge voltage range		-1.000 V to 6.000 V

* DUT cable: 5.5 mm² in diameter, 5 min length

Static

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Item			Specifications
Constant current charge/discharge	2A range	Range	0.0000 A to 2.0000 A
		Accuracy *1	±（0.15% of setting + 1.0 mA）
		Resolution	0.1mA
	20A range	Range	0.000 A to 20.000 A
		Accuracy *1	±（0.15% of setting + 10.0 mA）
		Resolution	1mA
Constant voltage charge/discharge		Range	-1.000 V to 6.000 V
		Accuracy *1	±（0.05% of setting + 1.2 mV）
		Resolution	1mV
Constant power charge/ discharge *2	2A range	Range	-0.100 W to 12.000 W
		Accuracy 1 3	±（0.5% of setting + 0.01 W）
		Resolution	1mW
	20A range	Range	0.10 W to 120.00 W
		Accuracy 1 3	±（0.5% of setting + 0.1 W）
		Resolution	10 mW

Pattern

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Item			Specifications
Constant current pattern	2A range	Range	-2.0000 A to 2.0000 A (negative values are discharge currents)
		Accuracy *1	±（0.15% of setting + 1.0 mA）
		Resolution	0.1mA
	20A range	Range	-20.000 A to 20.000 A
		Accuracy *1	±（0.15% of setting + 10.0 mA）
		Resolution	1mA
	Number of settings		100000step (maximum number of steps)
	Range		100 ms to 999.9 s (the time width per step)
	Resolution		100ms
	Switching time *4		100 ms max.
Constant power pattern *2	2A range	Range	-12.000 W to 12.000 W (negative values are discharge power)
		Accuracy 1 3	±（0.5% of setting + 0.01W）
		Resolution	1mW
	20A range	Range	-120.00 W to 120.00 W
		Accuracy 1 3	±（0.5% of setting + 0.1W）
		Resolution	10mW
	Number of settings		100000step (maximum number of steps)
	Range		100 ms to 999.9 s (the time width per step)
	Resolution		100ms
	Switching time *4		100 ms max.

*1 Ambient temperature range: 18 °C to 28 °C *2 The battery voltage is measured, and the control current (constant current control) is calculated from the set power value through software calculation. *3 Battery voltage range: 1 V to 6 V or higher *4 Maximum time required for switching: charge -> discharge, discharge -> charge

PFX2731S_Measurement accuracy

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			Specifications
Static/ Pattern
Charge/ discharge Current measurement	Range	2A range	-2.00000 A to 2.00000 A
	Range	20A range	-20.0000 A to 20.0000 A
	Accuracy *1	2A range	±（0.15% of reading + 1.0 mA）
	Accuracy *1	20A range	±（0.15% of reading + 10.0 mA）
	Resolution	2A range	0.01mA
	Resolution	20A range	0.1mA
Voltage measurement	Range		-2.0000 V to 7.0000 V
	Accuracy *1		±（0.05% of reading + 1.2 mV）
	Resolution		0.1mV
	Input resistance		10GΩ (voltage range: -2 V to 7 V)
Power measurement	Range	2A range	-12.000 W to 12.000 W
	Range	20A range	-120.00 W to 120.00 W
	Accuracy		Software calculation (voltage measurement × current measurement)
	Resolution	2A range	1mW
	Resolution	20A range	10mW
Capacity measurement	Range *2		-100.0000 Ah to 100.0000 Ah
	Accuracy		Software calculation (voltage measurement × current measurement)
	Resolution *2		0.1mAh
Time *3	Accuracy 1 4		±10ppm（TYP）

*1 At an ambient temperature between 18 °C and 28 °C. *2 The same for the 2 A range and 20 A range. *3 Accuracy of signal source used for elapsed time in charge/discharge *4 Monthly error: approximately 30 seconds

PFX2731S_Temperature measurement

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Thermocouple voltage (temperature) measurement block	Specifications
Number of measured terminals	Per channel
Thermocouple type	Type T
Range	-100.0 °C to 400.0 °C *1
Accuracy 2 3	± 1.5 °C (TYP values)
Reference junction compensation 2 4	±0.7℃（TYP）
Resolution	0.1℃
Measurement interval	2s

*1 The accuracy of the thermocouple is not guaranteed when it is used outside the operating range. The range depends on the thermocouple specifications (thermocouple class, wire diameter, and insulation). *2 At an ambient temperature between 18 °C and 28 °C. *3 When the voltage that the thermocouple calibrator produces is measured (the thermocouple tolerance is not included). *4 Indicates the performance of a thermometer at a reference junction (cold junction).

PFX2731S_Charge/discharge end condition list

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Charge/discharge mode	End condition
	largest Voltage	smallest Voltage	Start charging or discharging The set time from	Start of constant voltage operation The set time from	Start of constant voltage operation The defined Current from the	It Current. After falling below fixed time	-dV (Mask time) (Can be set)	dT/dt (℃/min)	Integrated current (Ah)	Integrated power (Wh)	largest SOC	smallest SOC	Pattern Charge/Discharge Time from start	loop (Repeat.) frequency	Battery Temperature
Constant current charge (CC)	✓		✓				✓	✓	✓	✓	✓				✓
Constant current-constant voltage charge (CC-CV)			✓	✓	✓	✓			✓	✓	✓				✓
Constant power charge(CP)	✓		✓						✓	✓	✓				✓
Constant power-constant voltage charge (CP-CV)			✓	✓	✓	✓			✓	✓	✓				✓
Constant current discharge (CC)		✓	✓						✓	✓		✓			✓
Constant current-constant voltage discharge (CC-CV)			✓	✓	✓	✓			✓	✓		✓			✓
Constant power charge(CP)		✓	✓						✓	✓		✓			✓
Constant power-constant voltage discharge (CP-CV)			✓	✓	✓	✓			✓	✓		✓			✓
Pattern constant current charge/discharge (Pattern)	✓	✓							✓	✓	✓	✓	✓	✓	✓

PFX2731S_Protection function_Overvoltage (overcharge) protection

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Item		Specifications
Overvoltage (overcharge) protection
Software OVP	Setting range	0.000 V to 6.300 V
	Resolution	1mV
	Setting accuracy *1	Depends on the voltmeter accuracy
	Operating time	50 ms max.
Hardware OVP *2	Setting range	0.0 V to 6.6 V
	Resolution	100mV
	Setting error *1	±0.5% of rating
	Operating time	10 ms (TYP) From overvoltage detection to output shutoff.

PFX2731S_Protection function_Undervoltage (overdischarge) protection

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Item		Specifications
Software UVP	Setting range	-1.100 V to 5.700 V
	Resolution	1mV
	Setting accuracy *1	Depends on the voltmeter accuracy
	Operating time	50 ms max.
Hardware UVP *2	Setting range	-1.1 V to 6.0 V
	Resolution	100mV
	Setting error *1	±0.5% of rating
	Operating time	10 ms(TYP) From undervoltage detection to output shutoff.

PFX2731S_Protection function_Overcurrent protection

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Item			Specifications
Software OCP	Setting range	Charge	2A range	0.000 A to 2.100 A
		Charge	20A range	0.000 A to 21.000 A
		Discharge	2A range	0.000 A to 2.100 A
		Discharge	20A range	0.000 A to 21.000 A
	Resolution*3		1mA
	Setting accuracy *1		Depends on the ammeter accuracy
	Operating time		50 ms max.
	Delay time		0 ms min. Detection delay timer setting
Hardware OCP *2	Setting range	Charging/ electrical discharge	2A range	0.0 A to 2.2 A
	Setting range		20A range	0.0 A to 22.0 A
	Resolution*3		100mA
	Setting error *1		±0.5% of rating
	Operating time		10 ms(TYP) From overcurrent detection to output off.

PFX2731S_Protection function_Overcharge/overdischarge capacity protection

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Item		Specifications
Software OAH *4	Setting range	1.0000 Ah to 2000.0000 Ah
	Setting accuracy *1	Depends on the ammeter accuracy and the main CPU clock accuracy
	Resolution	0.1mAh

PFX2731S_Protection function_Temperature (overheat) protection

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Item		Specifications
Software OTP	Setting range	-100 °C to 400 °C
	Setting accuracy *1	Depends on the temperature measurement accuracy
	Resolution	1℃

*1 At an ambient temperature of 18°C to 28°C *2 The setting value is retained in the charge/discharge unit.
The BPC4000 protects the specimens at all times, even when tests are not being performed. *3 Common to 2A range and 20A range *4 The application software calculates the nominal capacity multiplied by the set percentage and sets the value in terms of capacity.

Lineup

High-Rate Battery Tester
PFX2731S

Options

Output cable set

Application software

Application software BPChecker4000
SD035-PFX

Resources

Product Catalog

High-rate Battery Tester PFX2731S

https://global.kikusui.co.jp/download/cat_pfx2731s/

Category: Product Catalogues>Battery Tester

High-rate Battery Tester PFX2731S

Solutions

Rechargeable Battery Evaluation

https://in.kikusui.co.jp/kikusui-solutions/rechargeable-battery/

Introducing evaluation solutions for secondary batteries covering material, cell, module, and pack testing, as well as reuse and recycling applications. Supports charge/discharge testing, insulation and withstand voltage testing, impedance…

TesterPFX2731S

Product Overview

Enables high-rate charge/discharge tests necessary for enhanced rapid charge/discharge performance.

Features

Key Features

System Configuration

Example: One PFX2731S unit connected via LAN cable

Example: Four PFX2731S units and four temperature chambers* connected via LAN cable

CC Charging

CC Discharge

CC-CV Charge

CC-CV Discharge

CP Charge

CP Discharge

CP-CV Charge

CP-CV Discharge

Pattern charging/discharging: (CC(+CV), CP(+CV))

Fully Independent Operation for All Channels

100,000-step pattern charge/discharge function

The C-rate setting function makes changing complex test conditions simple

High-speed Data Sampling

Enables high-precision measurement

Enhanced protection functions

Conditions for Various Charge/Discharge Cutoffs

Convenient Scheduling of the Pause Function

Resuming a test from any point

Easy Firmware Update

Protection settings can be configured for each profile.

SD035-PFX BPChecker4000

Appearance

Back Panel

Specifications

Lineup

PFX2731S

Options

Output cable set

TL14-PFX

TL13-PFX

Application software

SD035-PFX

Resources

Product Catalog

High-rate Battery Tester PFX2731S

Solutions

Rechargeable Battery Evaluation