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Battery Control System

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Overview

A battery control system is used for managing remaining battery voltage and control of battery charging. The voltages of the individual cells are monitored and the balance controlled by a battery cell monitor MCU and lithium-ion battery cell monitor ICs. Battery management MCUs provided by Renesas can perform management of remaining battery voltage and battery charge control. In addition to battery cell monitor MCUs, Renesas supplies analog and power devices suitable for battery control systems.

System Block Diagram

Battery Control System

Battery Control System Block Diagram

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Recommended Products

MCU Recommended
Product
ROM
[Bytes]
RAM
[Bytes]
Operating
Frequency
[MHz]
Package
[Pin Count]
Features
Motor-generator control system
Main MCU
RH850/C1x 2M-4M 128K-240K 240x2
(Lock Step)
144-252 ECM, CLMA, ECC, TSG3, CAN, 12-bit ADC, RDC2, EMU2
V850E2/Px4512K-1M40K-80K80-160144DCLS*1, 32K-Data Flash, PWM output, 12-bit ADC, CAN, FlexRay
SH72A0/A2 256K-512K 32K-64K 80-100 64-100 32K-Data Flash, PWM output, 12-bit ADC, CAN
SH72AW/AY 768K 96K 160 176 32K-Data Flash, RDC*2, PWM output, 12-bit ADC, CAN, Motor-IP
Battery control system
battery ManageMent MCU
V850E2/Fx4 512K-2M 48K-144K 80 100-256 PWM output, 12-bitADC, CAN, LIN, FlexRay
SH72A0/A2 256K-512K 32K-64K 80-100 64-100 32K-Data Flash, PWM output, 12-bit ADC, CAN
Battery control system
cell Monitor MCU
78K0R/Fx3 24K-256K 1.5K-16K 24 30-100 16K-Data Flash, PWM output, 10-bit ADC, CAN, LIN
RL78/F1448K-256K4K-20K24-3230-1008K-Data Flash, Motor Control Timer, CAN, LIN, 10-bit ADC 31ch, 8-bit DAC, Comparator, LVD*3, 150℃
RL78/F1316K-128K1K-8K24-3220-804K-Data Flash, Motor Control Timer, CAN, LIN, 10-bit ADC 20ch, LVD, 150℃
RL78/F128K-64K0.5K-4K3220-644K-Data Flash, LIN, 10-bit ADC 12ch, LVD, 125℃
R8C/5x 32K-128K 2.5K-10K 32 48-64 4K-Data Flash, PWM出力, 10-bit ADC, CAN, LIN, LQFP
R8C/3x 16K-128K 1.5K-10K 20 20-80
Battery charger/DC-DC control system Main MCU RH850/P1x 512K-2M 64K-128K 160
(Lock Step)
100-144 ECC, BIST, ECM, TSG3, CAN, 12-bit ADC, ICU-S
V850E2/Px4512K-1M40K-80K80-160144DCLS, 32K-Data Flash, PWM output, 12-bit ADC, CAN, FlexRay
V850E2/Fx4 512K-2M 48K-144K 80 100-256 PWM output, 12-bitADC, CAN, LIN, FlexRay
SH72A0/A2 256K-512K 32K-64K 80-100 64-100 32K-Data Flash, PWM output, 12-bit ADC, CAN
Analog/
Power Device
Recommended
Product
Features
IGBT Bare-die support products Low Vce (sat) characteristics, high-speed switching characteristics
IGBT driver R2A251xx
**
With insulating function (micro-isolator), isolation voltage: 2.5KVrms, excessive current protection function, mirror clamp function, soft turnoff function, etc.
LiBCM-IC R2Axxxxx High-precision detection: ±4mV, high-speed measurement: 100µs/12 cells, passive cell balance (on-chip FETs), 2nd on-chip protection function
Power ManageMent IC uPD168890 Generation of system and MCU power supplies by DC/DC conversion from battery power supply, WDT function, safety functions

*1 DCLS: Dual Core Lock Step
*2 RDC: RD Converter
*3 LVD: Low Voltage Detection
**: In Planning Stage

Renesas Automotive Product Catalog


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