Measurement and management of CCCV charging current of lithium-ion battery and charger

- Lithium-ion batteries are charged using the constant-current, constant-voltage (CCCV) method, which manages voltage and current.
　　In CCCV charging, when the cell voltage is low, the current is constant. When the cell voltage reaches 4.2V,
　　the charge becomes a constant voltage charge, and the amount of current is reduced so that it does not exceed 4.2V.

- Lithium batteries require highly accurate control of charging voltage and charging current.
　　The PSA-series has an extremely small input resistance of approximately 40 mΩ (±5 A type and ±2 A type), enabling highly accurate measurements.

- Since measurement is made with a very small shunt resistance, voltage drop is small.
　　It can be used for current measurement of low-voltage devices and evaluation of battery and battery charge/discharge characteristics.

Overview

Current Measurements Guide - How is Current Measured? - Advantages of the PSA Series

Measurement basics, shunt resistance, low side/high side measurement, etc.

What this measurement can do

For constant current voltage charge measurement of rechargeable batteries of various mobile devices.

　 Examples of mobile devices: smartphones, wireless earphones, wearable devices, hair irons, laptop computers, etc.

- CAN 1ms update and 16bit analog 1ms update can be output simultaneously (option)

- Setting and logging are possible through the ammeter's USB Type-C connector using Coco Research's measurement management software LINKSHIP (free download).

Selection Points

Current measurement

　- 16bit analog output with 1ms update and CAN communication (option)
　　 Real-time measurement and feedback control of current values

Low cost

　- PSAL-2401: Low-cost DC ammeter.
　　 High-precision (16bit, update time: 40ms~) analog output is available as an option.

Products Overview　

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DC current input (ammeter)

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Main features

- Suitable for real-time PWM current measurement and feedback control

- Low shunt resistance of less than 40mΩ: also for charging current evaluation [±10A, ±5A, ±2A types]

- 16bit analog output and CAN output simultaneously

- Compatible with Coco Research's measurement management software LINKSHIP (free)

- Output: USB, CAN, RS-485, Modbus, 16bit analog output, alarm (warning)

DC current meter
48x96 size
PSA-4801

■CAN and analog, simultaneous output possible (1ms update)
■Measurement and setting by front button (key lock possible)
■Logging/setting possible via USB

DC current meter
24x48 size
PSA-2401

Low cost type
PSAL-2401

CAN and analog, simultaneous output available (1ms update)
(PSAL updates in 40ms)
■Logging/setting/power supply available via USB
■Board mount and DIN rail mount types

Related Products　

CAN analog converter	DC current	DC voltage
Thermocouple meter	Thermistor meter	RTD meter
Speed/Count	Torque/Freq.deviation	Resistance Meter

- CAN and 16-bit analog (voltage/current) output
- USB-C: setting and data logging
- Alarm output / RS-485
- Special software (free): setting management, report printing, data logging

EX48

EX(L)24

Customization（Many results, from 1 unit up.）

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We can handle from a single unit, such as "multi-CH, multi-variety measurement in a single unit/inserted in an enclosure like this. Please feel free to contact us.

Compact multi-CH
Flexible number of CHs