G32A1445-Based BMU Solution

The?Battery?Management?System?(BMS)?plays?a?critical?role?in?electric?vehicles,?and?manufacturers?are?continuously?optimizing?it?to?enhance?performance.?Within?the?BMS,?the?Battery?Management?Unit?(BMU)?is?responsible?for?key?functions?such?as?current?detection,?insulation?monitoring,?State?of?Charge?(SOC)?estimation,?capacity?tracking,?alarm?management,?charge/discharge?regulation,?and?remote?monitoring.?The?BMU?includes?a?microcontroller?system,?a?charge/discharge?management?unit,?a?CAN?communication?network?for?collecting?data?from?battery?cells,?and?control?units?for?total?voltage/current?detection?and?insulation?monitoring.

In?the?BMU?master?control?module,?accurate?data?collection,?intelligent?state?estimation,?and?efficient?management?ensure?smooth?battery?operations.?This?requires?a?robust?automotive-grade?MCU?that?adheres?to?functional?safety?and?reliability?standards,?guaranteeing?vehicle?safety?and?enabling?the?BMU?to?gracefully?downgrade?or?shut?down?in?the?event?of?anomalies.?Geehy’s?BMU?solution,?powered?by?the?G32A1445?automotive?general-purpose?MCU,?supports?voltage,?current,?and?insulation?detection,?as?well?as?charge?and?discharge?management?for?the?battery?pack.?It?monitors?battery?conditions?in?real?time,?processes?data?from?subsystems,?and?develops?strategies?to?ensure?optimal?safety.?The?onboard?CAN?transceiver,?load?driver,?and?pressure?sensors?enable?inter-board?communication,?high-side?driving,?and?pressure?detection.

Overview?of?the?G32A1445?BMU?Solution

The?G32A1445?MCU,?certified?with?ISO?26262?ASIL-B?and?AEC-Q100?Grade?1?standards,?serves?as?the?primary?controller.?It?connects?to?the?acquisition?module?via?a?high-speed?CAN?interface,?processing?real-time?battery?data?to?develop?dynamic?management?strategies.?The?MCU?controls?various?battery?operations,?including?thermal?management,?balancing,?charging,?discharging,?and?boundary?management,?while?also?exchanging?information?with?both?the?vehicle?and?charging?station.?Its?versatile?external?interfaces?include?voltage?and?temperature?acquisition?inputs,?fan?and?heating?control?outputs,?CAN2.0/CAN-FD?interfaces,?RS485,?switch?inputs,?and?high-voltage?relay?control,?making?it?ideal?for?a?wide?range?of?applications.

Features?of?the?G32A1445?BMU?Solution

• Provides?multi-channel?control?output?interfaces?with?isolated?high-voltage?relays.
• Supports?pressure?sensor?monitoring?to?detect?thermal?runaway?events.
• Includes?three?isolated?CAN?networks?to?connect?with?subordinate?CAN,?vehicle?CAN,?and?charging?CAN.
• Offers?rich?peripheral?configurations?for?efficient?external?design?interaction.
• Enables?voltage?detection,?overvoltage/undervoltage?diagnostics,?and?charge/discharge?control.
• Facilitates?battery?heating?and?cooling?functions.
• Complies?with?DC?charging?station?communication?protocols.

Key?Features?of?the?Automotive?General-Purpose?G32A1445?MCU

The?Geehy?G32A1445?MCU?is?equipped?with?advanced?peripherals?to?support?BMU?communication?upgrades.?Its?three?CAN?channels,?all?supporting?CAN-FD,?offer?a?maximum?data?length?of?64?bytes?and?a?bit?rate?of?up?to?8?Mb/s.?The?CAN-FD?protocol?enhances?the?existing?CAN?bus?without?altering?its?core?functionality,?allowing?for?simple?program?configuration?changes?during?upgrades?to?CAN-FD.?Additionally,?the?G32A1445?features?built-in?high-capacity?FLASH?memory?for?recording?operational?data,?reducing?the?need?for?external?memory?and?lowering?overall?costs.