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USER’S GUIDE
Multi-Cell Charger/Discharger
Agilent Model E4370A
Powerbus Load
Agilent Model E4371A
64-Channel Charger/Discharger
Agilent Model E4374A
Agilent Part No. 5964-8138
Microfiche No. 5964-8139
September 2000
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Warranty Information CERTIFICATION Agilent Technologies certifies that this product met its published specifications at time of shipment from the factory. further certifies that its calibration measurements are traceable to the United States National Bureau of Standards, to the extent allowed by the Bureau’s calibration facility, and to the calibration facilities of other International Standards Organization members. WARRANTY This Agilent Technologies hardware product is warranted against defect
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Safety Summary The following general safety precautions must be observed during all phases of operation of this instrument. Failure to comply with these precautions or with specific warnings elsewhere in this manual violates safety standards of design, manufacture, and intended use of the instrument. Agilent Technologies assumes no liability for the customer’s failure to comply with these requirements. GENERAL This product is a Safety Class 1 instrument (provided with a protective earth termina
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Safety Symbols SAFETY SYMBOLS Direct current Caution, risk of electric shock Earth (ground) terminal Caution, hot surface Protective earth (ground) terminal Caution (Refer to accompanying documents.) (Intended for connection to external protective conductor.) On - power (Indicates connection to the On - equipment (Identifies the on condition of ac mains.) part of the equipment.) Off - power (Indicates disconnection Off - equipment (Identifies the off condition of from the ac mains.) part of th
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Table of Contents Warranty Information 2 Safety Summary 3 Document Scope 4 Notice 4 Table of Contents 5 1 - GENERAL INFORMATION 9 Agilent MCCD System Capabilities 9 Basic Functions 10 Additional Features 10 Hardware Description 10 Agilent E4370A/E4374A MCCD 10 Agilent E4371A Powerbus Load 12 External Power Source 13 Multiple Agilent MCCD Configuration 14 Measurement Capability 15 Voltage Measurements 15 Current Measurements 15 Capacity Measurements 16 Cell Resistance 16 Probe Resistance 17 Data
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3 - CONFIGURATION 37 Configuring the LAN 37 1. Configure the HyperTerminal program 37 2. Connect the Agilent E4370A MCCD to the COM port on the PC 38 3. Fill Out the Agilent MCCD Configuration Screens 38 Network Configuration 39 Identification Configuration 40 Miscellaneous Configuration 41 Configuring the Digital I/O 41 Mixed Configuration Example 44 Accessing Calibration 44 4 - AGILENT MCCD USER INTERFACE 45 Description 45 PC Requirements 45 Browser Settings 45 Security 45 Localization 46 Acce
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cfCalTransfer 71 cfClose 71 cfDeleteGroup 71 cfGetCellStatus 72 cfGetCellStatusString 72 cfGetCurrent 72 cfGetDigitalConfig 73 cfGetDigitalPort 73 cfGetGroups 73 cfGetInstIdentify 74 cfGetInstStatus 74 cfGetMeasLogInterval 75 cfGetOutputConfig 75 cfGetOutputProbeTest 75 cfGetOutputState 76 cfGetRunState 76 cfGetSense 76 cfGetSenseProbeTest 77 cfGetSeqStep 77 cfGetSeqTest 77 cfGetSeqTestAnd 78 cfGetSeqTime 78 cfGetSerialConfig 78 cfGetSerialStatus 78 cfGetShutdownDelay 79 cfGetShutdownMode 79 cfG
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cfSetDigitalPort 92 cfSetErrorFunction 92 cfSetGroup 93 cfSetMeasLogInterval 93 cfSetOutputConfig 93 cfSetOutputProbeTest 94 cfSetOutputState 94 cfSetSense 95 cfSetSenseProbeTest 95 cfSetSeqStep 95 cfSetSeqTest 97 cfSetSeqTestAnd 99 cfSetSerialConfig 99 cfSetServerTimeout 99 cfSetShutdownDelay 100 cfSetShutdownMode 100 cfSetTimeout 100 cfSetTrigSource 100 cfSetVoltage 101 cfShutdown 101 cfStateDelete 101 cfStateList 102 cfStateRecall 102 cfStateSave 102 cfTrigger 102 cfWriteSerial 103 7 - C PROG
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1 General Information Agilent MCCD System Capabilities The Agilent Multi-Cell Charger/Discharger (MCCD) System has been designed to address the unique requirements and needs of lithium-ion cell manufacturing. The Agilent MCCD System can accurately charge, discharge, and measure lithium ion cells. It consists of an Agilent E4370A Multi-Cell Charger/Discharger mainframe with up to four Agilent E4374A 64-Channel Charger/Discharger cards. When fully loaded each mainframe has 256 input/output channe
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1 - General Information Basic Functions ♦ Charger – The Agilent MCCD can deliver accurately controlled current and voltage into a cell for proper forming. Each cell is independently paced through the cell forming sequence. This means that some cells can be charging and others discharging if they are at different points in the sequence. ♦ Discharger – The Agilent MCCD can draw accurately controlled current from a cell for both forming and capacity measurement. ♦ Measurement – The Agilent MCCD can
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General Information - 1 E4370A E4374A CHARGER/DISCHARGER 1 3 5 7 MULTICELL CHARGER/DISCHARGER 1 Ready Fault 2 4 6 8 E4374A CHARGER/DISCHARGER 1 3 5 7 SYSTEM 2 Power Ready Fault Ready Active 2 4 6 8 FAULT E4374A CHARGER/DISCHARGER 1 3 5 7 External Internal 3 Ready Fault 2 4 6 8 E4374A CHARGER/DISCHARGER 1 3 5 7 LINE 4 On Ready Fault Off 2 4 6 8 LINE Applies and removes ac power from the Agilent MCCD. Relays inside the unit that connect the power bus are disengaged when power is off, so the power
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1 - General Information B C D E A F RS-232 RS-232 PORT A PORT B G H J K A + and - Power bus connectors G RS-232 connectors (ports A and B) H AC line connection (a universal AC input for line (- bus bar is connected to chassis ground) B voltages from 87 Vac to 250 Vac, 50/60 Hz.) Calibration status LEDs C J Auxiliary output connection Configuration switches D Transfer Calibration switch K Calibration port E Digital I/O connectors F LAN connection Figure 1-3. Agilent E4370A/E4374A MCCD Rear Pane
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E4372A General Information - 1 POWERBUS LOAD Figure 1-4. Agilent E4371A Powerbus Load Front Panel Figure 1-5. Agilent E4371A Powerbus Load Rear Panel External Power Source For the charging cycle, each Agilent MCCD mainframe requires an external dc power source to power the cells. The external power source connects to the power bus terminals on the back of the mainframe. It must be rated at 24 volts and be able to source 125% of the required cell charging power. For example, to provide the cell c
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1 - General Information Additionally, a single supply of sufficient amperage may be shared among multiple mainframes that are connected to a common power bus - provided that the total current can be supplied while meeting the voltage specification at the power bus terminals at the rear of the Agilent MCCD. NOTE: If the external dc power source has an overvoltage protection circuit, it must be set higher than 30 volts to avoid the possibility of shutting itself down during the discharge cycle. Mu
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General Information - 1 The maximum power required for such a system is 25.6 kilowatts. A single power source of sufficient total amperage may be shared among multiple mainframes connected to the power bus, provided the total current can be provided while meeting the 24 volt dc input requirement at the power bus terminals on the rear of each mainframe. Multiple paralleled 24 volt dc sources may be used in place of the single 24 volt, 25.6 kilowatt dc source shown in the figure. To achieve improv
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1 - General Information Capacity Measurements Amp-hour capacity - the Agilent MCCD determines amp-hour cell capacity by making calculations based on continuous current measurements. During charge, every time the Agilent MCCD makes a measurement, it calculates the actual incremental amp-hours put into the cell during each measurement interval by multiplying the measured current times the measurement interval. It then adds this incremental amount to the accumulated amp-hour value to determine the
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General Information - 1 The Agilent MCCD measures the dc cell resistance by first disconnecting the charge/discharge circuits from all cells. A pulse generator in the Agilent MCCD mainframe is connected sequentially to each cell. The pulse generator passes a short-duration pulsed current through each cell while the measurement system digitizes the cell voltage and current using a high accuracy, high-speed A/D converter. Using proprietary algorithms to calculate the change in voltage relative to
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1 - General Information The comparison test to see if the ΔV, ΔI, and Δt values have been exceeded is done at the end of each measurement interval, so the fastest rate at which records can be written into the data buffer is the measurement rate of the Agilent MCCD. Any combination of events can be specified, so that a data log record is written into the data buffer when any of the events occur. Each record in the data buffer contains the following information: status (including CV/CC and step nu
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General Information - 1 External Digital I/O Protection Functions The Digital I/O subsystem on the Agilent MCCD can be configured to provide protection capabilities. These digital I/O signals operate independently, so that if there is a problem with the computer or the LAN connection the protection functions of the Agilent MCCD are not compromised. As explained in chapter 2, the 16 digital I/O signals can be individually configured to provide one of the following protection functions: External
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1 - General Information Application Programming Interface (API) The application programming interface runs under Windows 95 or Windows NT 4.0 using supplied C- language function calls. These function calls are documented in chapters 5 and 6, and provide the most comprehensive method of controlling the Agilent MCCD. The API interface is the preferred method of control when the Agilent MCCD is connected to a remote computer as part of an automated manufacturing process. Web Accessible Agilent MCCD
