Battery Electric Vehicles as a standard

​Offering a charging time under 10 minutes for Battery Electric Vehicle (BEV) will help consumers to switch from Internal Combustion Engine (ICE) cars to BEVs as ultra-fast charging stations will be quickly deployed in the upcoming years worldwide.

e-Mersiv batteries is an outstanding opportunity for manufacturers and tier ones to increase their market share in electric vehicles and give them the opportunity to take the lead in the next decade fastest growing in market.

Battery Electric Vehicles as a standard

​Offering a charging time under 10 minutes for Battery Electric Vehicle (BEV) will help consumers to switch from Internal Combustion Engine (ICE) cars to BEVs as ultra-fast charging stations will be quickly deployed in the upcoming years worldwide.

e-Mersiv batteries is an outstanding opportunity for manufacturers and tier ones to increase their market share in electric vehicles and give them the opportunity to take the lead in the next decade fastest growing in market.

A groundbreaking technology

e-Mersiv Lithium-ion technology is completely new and differs from benchmark batteries with the following unique selling points:
  • Charging time under 10 minutes
  • Battery cost reduced for the same usage
  • Heat transfer performance improved by a factor of 20
  • Pack temperature uniformity within 2K, 5 times better than benchmark
  • Safety: no fire propagation in case of thermal runaway of one cell
  • The power density is increased up to 5 times
  • Extends battery lifetime
  • Is suited to all cell types: pouch, prismatic or cylindrical cells

A groundbreaking technology

e-Mersiv Lithium-ion technology is completely new and differs from benchmark batteries with the following unique selling points:
  • Charging time under 10 minutes
  • Battery cost reduced for the same usage
  • Heat transfer performance improved by a factor of 20
  • Pack temperature uniformity within 2K, 5 times better than benchmark
  • Safety: no fire propagation in case of thermal runaway of one cell
  • The power density is increased up to 5 times
  • Extends battery lifetime
  • Is suited to all cell types: pouch, prismatic or cylindrical cells

100% internal skills

e-Mersiv gathers the best experts in battery design as well as in thermal management and this perfect fit enables to extend Lithium-ion batteries performances.

Choice of cells:

  • We choose the best supplier of lithium cells according to the customer’s specifications and we are able to integrate and manage all types of lithium cells produced industrially: NMC, NCA, LiFePO4, LTO, …
  • We are able to make reliable lifetime predictions based on battery system usage conditions.

High performance BMS (battery management system) hardware design

  • BMS are capable of handling batteries up to 1000 Volts from a few Ah to several thousand Ah,
  • The electronic architecture has been qualified according to the EN61508 standard with SIL2 and SIL3 safety levels,
  • The electronics has been qualified against disturbances of an electromagnetic field up to 200 Volts / meter, against ESD up to 15 kVolts
  • The accuracy of the voltage measurements is 5 mVolts

Qualifications

We are able to develop battery systems that meet the most demanding automotive and aeronautical standards:

  • Transport: UN38.3
  • Automotive: R100-2
  • Safety: EN61508, ISO26262, DO178, D0254
  • Environmental: B217100, D0160

Mechanical and electrical architecture design of the battery system

We have 22 years of experience in the design of lithium battery systems using the three types of factors forms: cylindrical, pocket and prismatic.

Areas where we have operational feedback:

  • Automotive
  • Aerospace
  • Spatial
  • Submarine
  • Industrial
  • Stationary

BMS firmwares design

  • BMS e-Mersiv algorithms calculate the SOC (state of charge) of battery systems with 5% better accuracy
  • These same algorithms calculate a state of health (SOH)
  • BMS dynamically calculate the permissible currents in charge and in discharge
  • BMS integrate logging systems over the life of the battery system

100% internal skills

e-Mersiv gathers the best experts in battery design as well as in thermal management and this perfect fit enables to extend Lithium-ion batteries performances.

Choice of cells

  • We choose the best supplier of lithium cells according to the customer’s specifications and we are able to integrate and manage all types of lithium cells produced industrially: NMC, NCA, LiFePO4, LTO, …
  • We are able to make reliable lifetime predictions based on battery system usage conditions.

High performance BMS (Battery Managemet System) hardware design

  • BMS are capable of handling batteries up to 1000 Volts from a few Ah to several thousand Ah,
  • The electronic architecture has been qualified according to the EN61508 standard with SIL2 and SIL3 safety levels,
  • The electronics has been qualified against disturbances of an electromagnetic field up to 200 Volts / meter, against ESD up to 15 kVolts
  • The accuracy of the voltage measurements is 5 mVolts

Qualifications

We are able to develop battery systems that meet the most demanding automotive and aeronautical standards:

  • Transport: UN38.3
  • Automotive: R100-2
  • Safety: EN61508, ISO26262, DO178, D0254
  • Environmental: B217100, D0160

Mechanical and architecture design of the battery system

We have 22 years of experience in the design of lithium battery systems using the three types of factors forms: cylindrical, pocket and prismatic.

Areas where we have operational feedback:

  • Automotive
  • Aerospace
  • Spatial
  • Submarine
  • Industrial
  • Stationary

BMS firmwares design

  • BMS e-Mersiv algorithms calculate the SOC (state of charge) of battery systems with 5% better accuracy
  • These same algorithms calculate a state of health (SOH)
  • BMS dynamically calculate the permissible currents in charge and in discharge
  • BMS integrate logging systems over the life of the battery system 

Fast charging a battery rejects a huge quantity of heat

The shorter the charging time, the higher the heat to be removed due to the battery internal resistance. The C-rate (current rate = power/energy) measures how fast a battery is charged / discharged. The charging time decreases when the C-rate increases. Best benchmark batteries today offer a maximum of 4C meaning a minimum of 15 minutes charging time from 0 to 80%.

Trying to keep an average temperature under control with the benchmark cooling systems- water-glycol cold plates – introduces a strong temperature gradient within the cell – and most of the time between cells which quickly destroys the battery.

The reason why is because the best existing cooling systems are not in direct contact with the battery cells as the water-glycol circulates within metal sheets. The maximum cooling capacity is therefore limited to 100 W/K/m2.

Fast charging a battery rejects a huge quantity of heat

The shorter the charging time, the higher the heat to be removed due to the battery internal resistance. The C-rate (current rate = power/energy) measures how fast a battery is charged / discharged. The charging time decreases when the C-rate increases. Best benchmark batteries today offer a maximum of 4C meaning a minimum of 15 minutes charging time from 0 to 80%.

Trying to keep an average temperature under control with the benchmark cooling systems- water-glycol cold plates – introduces a strong temperature gradient within the cell – and most of the time between cells which quickly destroys the battery.

The reason why is because the best existing cooling systems are not in direct contact with the battery cells as the water-glycol circulates within metal sheets. The maximum cooling capacity is therefore limited to 100 W/K/m2.

e-Mersiv cooling technology deeper in details

The only thermal management technology that authorizes ultra-fast charging / discharging is to cool the cells in direct contact with a dielectric fluid, a technology called immersion cooling. Therefore, the cooling capacity can exceed 2,000 W/K/m2 which is 20 times more efficient to remove heat than best water-glycol internal cold plates.

e-Mersiv technology has easily proven its ability to set forward the 4C limit. Already prismatic LTO modules are cycling at 20C rms in our laboratory with less than 2K temperature difference at any location. Charging a battery in less than 10 minutes is therefore possible without destroying the cells.

e-Mersiv cooling technology deeper in details

The only thermal management technology that authorizes ultra-fast charging / discharging is to cool the cells in direct contact with a dielectric fluid, a technology called immersion cooling. Therefore, the cooling capacity can exceed 2,000 W/K/m2 which is 20 times more efficient to remove heat than best water-glycol internal cold plates.

e-Mersiv technology has easily proven its ability to set forward the 4C limit. Already prismatic LTO modules are cycling at 20C rms in our laboratory with less than 2K temperature difference at any location. Charging a battery in less than 10 minutes is therefore possible without destroying the cells.