Langford Analytic · Knowledge Base
Battery & Electrical Structural–Thermal Analysis
Coupled structural and thermal assessment of battery cells, modules, packs and electrical equipment — from cell swelling, compression and module preload through enclosure load paths, cooling hardware, thermal gradients, busbar/joint integrity, vibration, crash, abnormal thermal events, sealing, ageing, power electronics, test correlation and verified qualification substantiation.
Battery Multiphysics Fundamentals
Cells, Modules & Preload
Battery Cell Mechanical Behaviour, Swelling & ConstraintHow cell stiffness, state-of-charge expansion, ageing growth and external constraint generate module loads, contact pressure and durability concerns.Battery Module Compression, Stack Preload & Load DistributionHow module frames, end plates, tie systems and compliant layers establish cell compression and how tolerance, thermal growth and ageing redistribute that load.
Pack Structures & Load Paths
Thermal–Mechanical Coupling
Battery Thermal Gradients & Structural DistortionHow cell heat generation, cooling nonuniformity and mixed-material construction create differential expansion, interface loads, distortion and clearance changes in battery modules and packs.Thermal Interface Materials, Gap Pads & Contact Pressure in Battery AssembliesHow compliant thermal interfaces simultaneously control heat transfer, mechanical preload, tolerance accommodation and local pressure in battery modules and power-electronic assemblies.
Electrical Interconnects & Durability
Battery Busbars, Interconnects & Electrical-Joint Thermo-Mechanical IntegrityHow current, contact resistance, temperature, cell movement and structural vibration combine to load battery busbars, tabs, welds and bolted electrical joints.Battery Pack Vibration, Shock & Fatigue AssessmentHow cell mass, module interfaces, mounts, cooling hardware and electrical interconnects respond to broadband vibration, sine environments and mechanical shock.Battery Pack Crash, Intrusion & Mechanical-Abuse AssessmentHow pack structures, barriers and modules are analysed for externally specified crash or intrusion environments, with emphasis on deformation, load path, contact, energy balance and cell-protection criteria.
Verification & Engineering Workflow
Abnormal Thermal Events & Containment
Battery Thermal Runaway — Structural Consequences & Propagation AssessmentHow an externally defined thermal-runaway event becomes a structural, thermal and containment assessment for cells, modules, barriers, supports and pack enclosures.Battery Enclosure Pressure, Venting & Gas-Release Structural LoadsHow externally defined internal-pressure and venting histories are translated into enclosure loads, panel response, fastener reactions and vent-function verification.
Cooling, Sealing & Environmental Integrity
Battery Cooling Plates, Channels & Manifold Structural IntegrityStructural assessment of liquid-cooled battery hardware under pressure, thermal gradients, assembly contact, vibration, fatigue, manufacturing variation and leak-critical deformation.Battery Sealing, Breathers, Ingress & Condensation — Structural–Thermal EffectsHow gaskets, breathers, pressure equalisation, water/dust ingress and condensation interact with enclosure deformation, thermal cycling and long-term structural integrity.
Power Electronics & Electrical Equipment
Ageing & Lifecycle Durability
Battery Ageing, Swelling Evolution & Preload RetentionHow cell ageing, irreversible growth, compliant-interface relaxation and structural creep change module preload, enclosure load and thermal contact over service life.Battery Thermal Cycling, Low-Cycle Fatigue & Interface DurabilityHow repeated temperature, state-of-charge and power cycling create strain ranges in pack structures, electrical joints, cooling hardware, adhesives and interfaces.
Correlation, Qualification & Substantiation
Battery Environmental & Combined Qualification — Temperature, Humidity, Vibration & ShockHow battery structural–thermal models support qualification across temperature extremes, humidity/ingress, vibration, shock and combined environmental states without double counting loads.Battery Test Correlation, Parameter Identification & Model UpdatingHow cell, module and pack tests are used to identify uncertain stiffness, contact, thermal and damping parameters and convert simulation into validated engineering evidence.Qualification & Substantiation of Battery & Electrical Structural–Thermal SystemsA complete evidence workflow linking requirements, operating states, coupled models, tests, uncertainty, configuration control and engineering margins for battery-system qualification.