Start with the system.
Then look inside.
A concise guide for industry readers, project teams and anyone trying to ask a better battery question.
Four layers. Different decisions.
Chemistry & form factor
LFP, nickel-rich lithium-ion and emerging chemistries address different priorities. Cylindrical, prismatic and pouch describe cell formats, not chemistry. Ask for measured performance under the actual duty cycle.
Mechanical & electrical design
Cell arrangement, interconnections, protection, enclosure and thermal design affect usable energy and system behaviour. A cell specification is not a pack or container specification.
Monitoring & management
The battery management system monitors cell conditions. Power conversion, plant controls and dispatch software perform other roles. Specify system boundaries and interfaces before comparing offerings.
Installation & operation
Site conditions, grid connection, operating strategy, maintenance and end-of-life handling belong in the project brief. Their costs and constraints extend beyond buying cells.
Educational synthesis informed by the official LG Energy Solution ESS and CATL storage descriptions. Product-specific evidence takes precedence.
Match the questions to the duty.
| Application | What to define | Evidence to request |
|---|---|---|
| Electric mobility | Weight, packaging, charging conditions, temperature and driving duty | Pack-level performance, charging limits and warranty operating conditions |
| Grid storage | Power, usable energy, dispatch duration and grid-service obligations | AC performance boundary, degradation assumptions and availability terms |
| Commercial & industrial | Load profile, peak exposure, site space and operating hours | Metered load data, site feasibility and integration responsibilities |
| Data centres & backup | Critical load, transfer behaviour, runtime and redundancy | Load-step response, autonomy conditions and coordinated protection design |
Circularity begins
before retirement.
Keep identity, operating history and condition records throughout a battery’s life. Reuse and recycling are distinct pathways, with different technical and logistical requirements.
See LG Energy Solution’s circular energy strategy, 7 October 2024. Future business plans remain company statements.
What belongs in a lifecycle record?
System identity, commissioning date, chemistry, operating limits, maintenance, faults, state-of-health assessments and the responsibilities of each organisation.
Can every used EV battery be reused?
No. A second application needs a condition assessment, suitable remaining performance, an integration design and an economic case. This site does not assess individual batteries.
What does a recycling discussion need?
Battery composition, handling arrangements, transport requirements, processing route, recovery evidence and a clearly identified responsible operator.