FANSO Li-SOCl2 battery packs – tailored to your requirements
Lithium-thionyl chloride (Li-SOCl2) batteries are the go-to choice for industrial, medical, and IoT applications. Their popularity stems from an exceptionally high energy density, long service life, and stable discharge characteristics.
In practice, though, most devices need a complete assembly rather than a single component. This is where custom battery packs come in, providing specific voltages, physical footprints, connectors, and environmental protection.| Established manufacturers like FANSO can design and build these packs to meet both standard and highly niche requirements. This level of customisation doesn't just boost system performance; it simplifies your integration process and improves long-term reliability in the field. |
Key advantages of choosing a FANSO Li-SOCl₂ battery pack
Standard Li-SOCl2 cells, typically with a nominal 3,6 V, are fine for simple setups. However, many modern systems demand more complex configurations, such as:
- Higher operating voltages (e.g. 7,2 V, 10,8 V, or higher)
- Increased capacity through parallel configurations
- Specific mechanical layouts to fit into tight or unusually shaped enclosures
- Pre-fitted leads, connectors, or terminals for immediate "plug-and-play" installation
- Enhanced safety features and rugged environmental protection
| Good to know: Customising Li-SOCl2 cells into battery packs allows you to optimise battery performance, integration efficiency, and overall power reliability. |
"Building ready-to-use Li-SOCl2 packs with integrated leads and connectors is about more than just wiring; it requires a precise balance of electrical, mechanical, and manufacturing know-how. Specifically, FANSO uses their established expertise to deliver solutions tailored exactly to your needs. Whether that involves unique cell geometry, specialised connectors, or robust environmental shielding, they have the technical track record to get it right," notes Pavel Kováč, Product Manager at SOS electronic.
1. Electrical configuration of battery packs
Series and parallel connections
- Series connection boosts operating voltage - for instance, connecting two 3,6 V cells in series delivers 7,2 V.
- Parallel connection increases total capacity (mAh) while maintaining a stable voltage.
- Hybrid configuration of series-parallel combinations is used to strike the right balance between voltage requirements and total capacity.
Managing pulse current
While Li-SOCl2 technology is ideal for low continuous currents, applications with high pulse demands, like wireless communication modules, can be tricky. In these cases, it is recommended to connect special HLC (hybrid layer capacitor) units in parallel to handle those sudden spikes without stressing the cells.
2. Mechanical layout and arrangement
The physical fit is often just as vital as the electrical specs. Battery packs have to slip into device housings while maintaining structural integrity and thermal stability.
Common layout options include:
- Inline arrangements (end-to-end stick configuration)
- Parallel arrangements (Side-by-side flat pack configuration)
- Radial or clustered arrangements
- Custom 3D geometries for compact devices
3. Critical connections: Leads, tabs, and connectors
| FANSO can pre-assemble packs with application-specific connectors. This not only speeds up your production line but also significantly reduces the risk of wiring errors during installation. |
Internal connections
- Nickel contact tabs spot-welded to the cell terminals.
- Proper welding techniques are essential here to avoid heat damage and ensure low resistance.
External leads
- Power is delivered via attached insulated wires - usually PVC, silicone, or Teflon.
- Strain relief is often added to these leads to prevent mechanical fatigue over time.
Connectors
- Integration options include standard JST or Molex connectors, as well as custom solutions.
- Connector choice depends on the rated current, the required mating cycles, and the expected environmental conditions.
4. Safety and protective features
Even though Li-SOCl2 cells are inherently stable, battery packs can be outfitted with extra layers of security, including:
- PTC (Positive Temperature Coefficient) devices for overcurrent protection
- Fuses for short-circuit protection
- Diodes for reverse polarity protection
- Epoxy potting, heat-shrink sleeving, or protective lacquer
Looking for a battery solution tailored to your needs?
FANSO, a specialist in Li-SOCl2 and Li-MnO2 lithium batteries, provides a comprehensive service that covers everything from cell selection and pack design to prototyping and mass production. This ensures every custom assembly meets strict quality and safety standards. If you are looking for a power solution that fits your design perfectly, don't hesitate to contact us. We are happy to facilitate this service directly with the manufacturer. |
You can find an overview of the FANSO battery range on our website, and for more details on specific series, feel free to browse our previous technical articles.
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