Li-NMC
Custom Lithium-Ion
Battery Pack Manufacturer
Lithium-ion (NMC) technology stands out from other rechargeable lithium technologies due to its high energy density. Li-ion is particularly suitable for projects subject to constraints in terms of weight, size and performance.
At Enix Power Solutions, the design of a custom Lithium-ion battery pack is based on an analysis of your specifications. Our design team takes into account the electrical, electrochemical, mechanical and thermal parameters specific to each application.
Are you looking for a technical partner to develop your custom battery pack? Our design office can analyse your specifications.
Why Choose
Enix Power Solutions
For this Technology?
Enix Power Solutions has 30 years’ expertise in the integration of batteries, rechargeable cells and management electronics. As a Lithium-ion battery pack manufacturer, EPS selects each component according to the project’s requirements. We do not build a solution using off-the-shelf components or existing designs.
For each project, we select the components best suited to your specifications: the format and characteristics of the cells, electrical architecture, management electronics, protection circuits, mechanical integration, connectors and the charging method.
Our engineers select the battery format according to the project’s requirements:
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Cylindrical cells:
suitable for a wide range of assembly configurations.
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Prismatic cells:
used in certain compact or high-capacity architectures.
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Pouch cells:
suitable for thin materials and unusual shapes.
Our design office also analyses the specific characteristics of each cell: behaviour during charging and discharging, internal resistance, dispersion, temperature and ageing.
Please consult us as early as the preliminary design stage to help you define your technical choices.
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When should this
technology be used?
When should this
technology be used?
technology be used?
Li-NMC technology is suitable for projects where energy density is a key priority. In particular, it is well-suited to applications subject to volume or weight constraints.
We recommend the use of Lithium-ion (NMC) in the following sectors:
A Rigorous Approach
We approve the use of Li-ion only after a detailed analysis of your specifications. If your specifications change, we will adjust our technical recommendation accordingly.
The Mistake to Avoid
Sticking to a single cell technology at the start of a project. Analysis of your actual requirements should guide the choice of chemistry and cell format, not the other way round.
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A Rigorous Approach
We approve the use of Li-ion only after a detailed analysis of your specifications. If your specifications change, we will adjust our technical recommendation accordingly.
-
The Mistake to Avoid
Sticking to a single cell technology at the start of a project. Analysis of your actual requirements should guide the choice of chemistry and cell format, not the other way round.
Advantages
of Li-NMC technology
must be considered in the context of the application’s constraints.
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Energy density
Lithium-ion (NMC) technology stores a large amount of energy within a limited volume.
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Compactness
Suitable for equipment subject to integration constraints.
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Weight
Power-to-weight ratio makes it suitable for mobile or embedded applications.
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Variety of formats
Available in cylindrical, prismatic or pouch cells.
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Technological maturity
Lithium-ion (NMC) technology has been in industrial use for over twenty years.
Lithium-ion (NMC) technology stores a large amount of energy within a limited volume.
Suitable for equipment subject to integration constraints.
Power-to-weight ratio makes it suitable for mobile or embedded applications.
Available in cylindrical, prismatic or pouch cells.
Lithium-ion (NMC) technology has been in industrial use for over twenty years.
Limitations
and key issues to be aware of
There are several constraints that the customer must take into account:
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Recharging
The charging profile depends on the battery selected and the manufacturer’s recommendations.
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Storage
Charge level should be checked every three to six months, depending on the battery’s self-consumption.
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Storage conditions
We recommend a stable temperature of between 20 and 25°C and controlled humidity.
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Approvals
Requirements relating to the battery, the end product and the target markets must be anticipated.
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Certification
Depending on the markets our client is targeting, the battery will need to have the appropriate certifications.
The charging profile depends on the battery selected and the manufacturer’s recommendations.
The charge level should be checked every three to six months, depending on the battery pack’s self-consumption.
We recommend a stable temperature of between 20 and 25°C and controlled humidity.
Requirements relating to the battery, the end product and the target markets must be anticipated.
Depending on the markets our client is targeting, the battery will need to have the appropriate certifications.
USE CASE
Development of a Custom Lithium-ion Battery
for Underwater Environmental
Data Acquisition Equipment
Client context
Our client had developed an underwater data acquisition platform for measuring water temperature and various other parameters, designed to monitor the impact of climate change on intermediate and deep-water zones. This equipment could be submerged to a depth of up to 600 metres. Once submerged, it could take measurements every 15 minutes and transmit them to the surface over a period of three months.
Technical constraints of the project
- Significantly reduced available space
- How does the pressure at a depth of 600 metres affect the behaviour of the batteries?
- High reliability in a hard-to-access underwater environment.
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The Custom Solution Developed by EPS
As we had very little information on how a lithium battery would perform at this depth, we began – in collaboration with our client – with a characterisation and validation phase, which enabled us to identify the most suitable battery model.
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Electrical architecture |
Rated voltage of 18V (5S5P) with a capacity of 17.5Ah |
|
Cells used |
18650-format Lithium-ion (NMC) cells |
|
Integrated electronics |
A 5S PCM to monitor voltage and current and protect the battery pack against malfunctions |
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Results and benefits
- The solution developed provided three months’ battery life under the anticipated operating conditions.
- The custom battery pack was successfully integrated into the available space.
- The Lithium-ion battery pack complied with the main regulatory and standards requirements: UN38.3, IEC62619, CE marking.
Planning a migration or a battery retrofit?
BMS, PCM & associated
protection circuits
Lithium-ion (NMC) technology requires suitable battery management electronics and protective measures.
The main role of the BMS or PCM is to protect the user and ensure the safe operation of the battery pack.
Transport, certifications
& regulations
Placing equipment incorporating an Lithium-ion (NMC) battery on the market requires compliance with the regulations in force.
Each project includes an assessment of the requirements necessary for European…
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Factors to consider
before choosing this technology
Factors to consider
before choosing this technology
before choosing this technology
In order to validate the choice of Lithium-ion (NMC) and commence the technical study, several parameters in your specifications must be precisely defined:
Application
Battery function and equipment to be powered
Voltage & Capacity
Expected values for system operation
Current peaks (duration, frequency)
Intensity, duration and frequency. A discharge curve makes analysis easier.
Communication Protocol
Desired protocol, such as SMBus, I2C or CAN, and expected data, including SOC and SOH.
Dimensions & Integration
Dimensions, geometry, maximum weight and type of casing
Connector
Connector type, specifications and cable length
Charging mode
Recommended charger and charging conditions
Environment & Temperature
Usage conditions and temperature ranges
Transport and regulations
Destination countries, certifications and logistical constraints
Timeframes and volumes
Expected quantities for the prototype, the first production run and the annual volume
Economic objective
Target unit price for mass production
Other constraints
Any requirements specific to the application
Are you in search of a Custom Lithium-Ion Battery Pack Manufacturer?
Enix Power Solutions can provide you with comprehensive support in defining the architecture, integrating the BMS and manufacturing your custom battery solution.
FAQ
Why does a Lithium-ion battery pack require protection and management electronics?
Lithium-ion (NMC) technology requires monitoring and protection functions. Depending on the project, a PCM or a BMS monitors voltages, currents and temperatures. It controls safety shutdowns. Balancing, communication and status monitoring functions depend on the specifications.
What transport restrictions should be taken into account for a Lithium-ion battery pack?
Before being transported, lithium batteries must have passed the UN 38.3 tests. The shipping requirements then depend on the mode of transport, the configuration of the battery pack, its state of charge, its packaging and the required documentation.
Does EPS guarantee a specific number of cycles for its custom batteries?
No. The number of cycles depends on the cells, the depth of discharge, the currents, the temperatures, the storage conditions and the operating environment.
What happens if Li-ion (NMC) technology does not meet my specifications?
EPS will investigate another battery technology. The choice depends on the application’s requirements, the environment, safety, current ratings, size and the target service life.
WHY DOES A LITHIUM-ION BATTERY PACK REQUIRE PROTECTION AND MANAGEMENT ELECTRONICS?
Lithium-ion (NMC) technology requires monitoring and protection functions. Depending on the project, a PCM or a BMS monitors voltages, currents and temperatures. It controls safety shutdowns. Balancing, communication and status monitoring functions depend on the specifications.
WHAT TRANSPORT RESTRICTIONS SHOULD BE TAKEN INTO ACCOUNT FOR A LITHIUM-ION BATTERY PACK?
Before being transported, lithium batteries must have passed the UN 38.3 tests. The shipping requirements then depend on the mode of transport, the configuration of the battery pack, its state of charge, its packaging and the required documentation.
DOES EPS GUARANTEE A SPECIFIC NUMBER OF CYCLES FOR ITS CUSTOM BATTERIES?
No. The number of cycles depends on the cells, the depth of discharge, the currents, the temperatures, the storage conditions and the operating environment
WHAT HAPPENS IF LI-ION (NMC) TECHNOLOGY DOES NOT MEET MY SPECIFICATIONS?
EPS will investigate another battery technology. The choice depends on the application’s requirements, the environment, safety, current ratings, size and the target service life.
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