Sarah Lindqvist

Sarah Lindqvist

Sarah Lindqvist is a Battery Management Systems engineer with 12 years of experience in SOC/SOH estimation algorithms, protection circuit design, and cell balancing systems. She has led BMS development programmes for portable power stations, industrial UPS, and compact energy storage products across European and Asian markets.

Ring Daisy-Chain BMS Communication Architecture for Compact Energy Storage: BER, Differential Isolation, and Manchester Encoding

TL;DR In FPGA-validated testing across a 5-node ring daisy-chain BMS communication architecture, the system achieved a bit error rate of 3.1×10⁻⁷ at 1.2 MHz — confirming the design comfortably exceeds its 1 MHz target under real-world noise conditions. For buyers…

Read article →Ring Daisy-Chain BMS Communication Architecture for Compact Energy Storage: BER, Differential Isolation, and Manchester Encoding

SOC Estimation Accuracy in Sodium-Ion BESS: GS-LSTM-Attention Algorithm Evaluation for Procurement Engineers

TL;DR A GS-LSTM-Attention model tested on 18650 cylindrical sodium-ion cells achieved an R² of 0.977 1 at 2 A discharge — improving coefficient of determination by 0.120 3 over baseline LSTM — while holding R² above 0.91 across all three…

Read article →SOC Estimation Accuracy in Sodium-Ion BESS: GS-LSTM-Attention Algorithm Evaluation for Procurement Engineers

BMS Circuit Design for EV Battery Packs: Per-Cell Protection, Balancing Topologies, and Supplier Qualification

TL;DR A BMS using I²C-controlled charge management ICs with per-cell voltage monitoring (±15 mV detection accuracy, 1.5–4.5 V per-cell range) delivers meaningfully tighter protection than designs that rely on pack-level voltage sensing alone. For buyers sourcing EV battery packs or…

Read article →BMS Circuit Design for EV Battery Packs: Per-Cell Protection, Balancing Topologies, and Supplier Qualification

AI Predictive Balancing in BMS: LSTM Multi-Cell Synchronous Control for Energy Storage Procurement

TL;DR AI predictive balancing using LSTM networks achieves 93–98% balancing efficiency and reduces SOC deviation errors to ±0.5% — versus ±2.5% for passive resistive balancing — with single-cycle energy consumption of just 1.8 Wh compared to 5.2 Wh for passive…

Read article →AI Predictive Balancing in BMS: LSTM Multi-Cell Synchronous Control for Energy Storage Procurement

SOP-Weighted SOC Equalization for Parallel Battery Pack Systems: A Procurement Engineering Guide

TL;DR In a validated 4-pack parallel BESS configuration running at a 400 V bus, SOP-weighted power allocation held inter-pack SOC deviation to within 10% across full charge and discharge cycles, with current imbalance staying under 1% relative deviation at matched…

Read article →SOP-Weighted SOC Equalization for Parallel Battery Pack Systems: A Procurement Engineering Guide

Network Self-Balancing BMS Topology: Technical Procurement Guide for Battery Cell Equalization

TL;DR In a 9-cell matrix balancing simulation, the network-topology self-equalization approach reduced SOC divergence from a peak imbalance of 23.3 percentage points to near-zero without any capacitors or inductors in the energy transfer path. For buyers specifying BMS modules for…

Read article →Network Self-Balancing BMS Topology: Technical Procurement Guide for Battery Cell Equalization

Microservice BMS Architecture for Mobile Lithium Battery Systems: A Technical Procurement Guide

TL;DR A microservice-based mobile lithium battery BMS platform deployed in active grid maintenance operations demonstrated a data transmission bandwidth of 400 Mbps — double that of conventional single-architecture systems — while sustaining 99.99% authentication service uptime and sub-500 ms API…

Read article →Microservice BMS Architecture for Mobile Lithium Battery Systems: A Technical Procurement Guide

Intelligent BMS State Estimation for Mobile BESS: DEKF Algorithm Performance, Safety Factor Analysis, and Supplier Qualification Guide

TL;DR A dual extended Kalman filter (DEKF) BMS monitoring model applied to a 50 kWh mobile LFP energy storage unit achieved SOC estimation error as low as 0.3% on charge cycles and voltage error of 1.05×10⁻⁴ on discharge — outperforming…

Read article →Intelligent BMS State Estimation for Mobile BESS: DEKF Algorithm Performance, Safety Factor Analysis, and Supplier Qualification Guide

Intelligent BMS State Estimation for Mobile Energy Storage: SOC Accuracy, SoH Monitoring, and Supplier Qualification

TL;DR A dual extended Kalman filter (DEKF) model demonstrated SOC estimation error of just 0.3% on charge and 0.58% on discharge for a 50 kWh mobile energy storage battery, outperforming standard EKF across all three charge/discharge cycles tested. For buyers…

Read article →Intelligent BMS State Estimation for Mobile Energy Storage: SOC Accuracy, SoH Monitoring, and Supplier Qualification

LiFePO4 Household Energy Storage BMS: SOC Accuracy, Sampling Precision, and Master-Slave Architecture Evaluation

TL;DR A LiFePO4-based household energy storage BMS built around a master-slave topology with a 14-bit ADC sampling core achieved voltage measurement error within ±2mV, temperature error within ±1°C, and SOC estimation error within ±6% — outperforming standard coulomb-counting methods that…

Read article →LiFePO4 Household Energy Storage BMS: SOC Accuracy, Sampling Precision, and Master-Slave Architecture Evaluation