Existing Technology-Optocoupler Relays
Discrete device acquisition, complex peripheral circuits, large product volume, poor anti-interference performance, and easy to cause large acquisition deviations, jumps, or even failure to acquire in a common-mode interference environment; There is a risk of false conduction in the optocoupler relay, which may cause a direct short circuit of the battery; The acquisition speed is slow and the acquisition accuracy is low; Commercial-grade performance.
GEEC: ASIC Technology
ASIC, simple circuit, high reliability, multi-channel high-precision reference, high acquisition accuracy, high-voltage isolation from acquisition and MCU, high anti-interference performance; Acquisition rate is fast, support sampling harness open circuit detection; temperature isolation acquisition
In-module equalization
Only the consistency balance between the modules or the monomers in the PACK can be achieved, which may easily cause inconsistencies between the modules, and the modules need to be balanced twice, which is inefficient.
GEEC: Cell to Cell Balance
The active equalization between cells in the battery cluster adopts the bidirectional active equalization technology based on the power bus, which can realize the bidirectional energy transfer between any two or more single cells in the battery cluster. Break through the limitations of battery modules or PACKs, and realize bidirectional energy balance between any single battery in the cluster, with high efficiency
Statistics and calculations show that active equalization can prolong battery life by 20%
Major Parameter-SOS（state of safety）
We defined a new word —— SOS (State of Safety) , to describe the battery safety status as
an evaluation parameter of the battery. It makes BMS can monitor the safety status of the battery,
ensure the battery system is running in the safe operating range, and then alert the possible safety risk to improve the battery system security.
SOS is evaluated by SOC, SOH, R, ΔR, T, ΔT , with the voltage and temperature monitoring
of each cell. A judgment model of battery thermal runaway will be established and 10 levels of
parameters will be given.
SOS = F[ SOC, SOH, ΔR, ΔT ]
Active Balancing chip
At present, AFE of the front-end acquisition circuit has been completed, which has been applied to 100,000 pieces since 2018.Based on the bidirectional active equalization technology with independent intellectual property rights, the company started the research and development of the Active Balancing chip, completed the MPW sample in September 2019, and put into mass production in Q4 in 2020.
