Chevrolet Equinox EV Battery Technology Explained: Capacity, Chemistry, Charging & Longevity

The Chevrolet Equinox EV is General Motors’ attempt to make a practical, affordable, long-range electric crossover for mainstream buyers. At the heart of any EV’s capability — range, charge speed, longevity and cost — is the battery system. This article explains the Equinox EV’s battery technology in full detail: the cell chemistry and form, module and pack architecture, thermal and battery management strategies, charging behaviour, longevity/warranty considerations, and what owners can do to get the best life and range from their battery.

The big picture: Ultium platform and why it matters

The Equinox EV uses GM’s Ultium-based battery architecture — a modular system GM developed to be flexible across many vehicle sizes and performance targets. That flexibility allows GM to tune capacity, voltage and power for different models while using common cell and module technology. The Ultium approach emphasises large-format pouch cells, fewer modules per pack, and a wireless battery management system to reduce weight and complexity. 

Why that matters to drivers: a standardised platform helps lower cost through scale, speeds engineering updates across the lineup, and makes it easier for GM to offer improvements (new cells, chemistries, or manufacturing tweaks) over time.

Cells & chemistry — what’s inside the pack

The physical battery building blocks in the Equinox EV are large-format pouch cells produced through GM’s Ultium program. The chemistry GM specifies for the Equinox EV pack is a high-energy nickel-rich lithium chemistry — often described as NCMA (nickel-cobalt-manganese-aluminium) or a close variant — combined with a blended graphite anode. These nickel-rich chemistries deliver higher energy density (more watt-hours per kilogram) than lower-cost chemistries such as LFP (lithium-iron-phosphate), which is why they are used in vehicles that prioritise range. 

A few practical takeaways about this chemistry:

• High energy density: gives the Equinox its long range for the battery size.
  
• Cost & materials tradeoffs: nickel helps energy density but is more costly and sensitive to supply-chain pressures; aluminum and manganese are used partially to reduce cobalt content and cost while balancing stability.
  
• Other chemistries in GM’s toolbox: GM is also developing LFP and new manganese-rich chemistries for different use cases (lower cost, or higher durability), but the Equinox’s primary pack is the nickel-rich Ultium chemistry.

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Pack size, nominal capacity and usable capacity

GM configures the Equinox EV with a pack whose nominal energy and usable energy numbers are designed to balance range and cost. Independent analyses and GM’s specs show a pack in the mid-80-to-90 kWh nominal class with a reported usable capacity around ~85 kWh, which yields EPA estimates of roughly 319 miles in front-wheel-drive configuration on recent Equinox EV models. Exact numbers can vary by model year and drivetrain (dual-motor AWD trims reduce range). 

Important distinction:

• Nominal (calculated) capacity is the theoretical energy in the cells multiplied across the pack.
  
• Usable capacity is what the vehicle lets you access for driving — manufacturers reserve a small buffer to protect cells from damage and to support longevity and state-of-charge control.

Modules, pack architecture and voltage

Ultium packs use many cells grouped into modules, and modules wired together into a pack. For the Equinox EV, the architecture yields a pack voltage in the low hundreds of volts (pack-level voltages are chosen to match inverter and motor requirements and to optimize energy and power delivery). Large pouch cells allow higher amp-hour capacity per cell, which reduces the number of parallel strings needed and simplifies thermal and wiring design. InsideEVs’ technical breakdowns show module and pack configurations that result in an effective pack around the ~288 V nominal reported in some technical summaries, with pack topologies selected for the vehicle’s power and packaging. 

Thermal management — keeping the pack in the safe zone

All lithium battery chemistries need careful temperature control. The Equinox EV uses active thermal management (liquid cooling/heating through cold plates or channels interfaced to modules) to keep cells in the optimal window for fast charging and long life. Effective thermal control reduces degradation from high-temperature exposure during fast charging or sustained heavy use, and also preserves range in very cold climates where batteries lose performance. GM’s Ultium system integrates thermal controls and cell monitoring at module and pack level to balance performance and longevity.

Battery Management System (BMS) and safety features

A modern EV pack does much more than store energy — the BMS continuously monitors cell voltages, temperatures, currents, and internal resistances, balancing cells and controlling charge/discharge limits. GM’s Ultium includes a BMS architecture designed for wireless module communication in many Ultium packs, which reduces wiring complexity and pack mass, and supports diagnostics and balancing routines that protect the cells. Safety features include mechanical crash protection, fusing at module and pack levels, and fail-safe isolation to minimise risk in the event of thermal runaway. 

Charging: speeds, behaviour and what to expect

The Equinox EV supports Level 2 AC charging at typical home rates (an onboard charger is sized to provide ~11.5 kW on many trims) and DC fast charging — commonly rated up to about 150 kW on public CCS stations for current models. Under ideal conditions, DC fast charging can add significant range quickly (manufacturers often quote figures like ~70–77 miles in ~10 minutes under optimal conditions), though real world charging power tapers as state of charge rises and depends on temperature and station capability. Expect charging times to slow as the pack approaches 80–100%: fast charging is fastest from low-to-mid SoC and slows above ~70–80% to protect cell life. 

Practical charging advice:

• For daily use, charging to ~80–90% preserves battery health while giving plenty of range.
  
• Use DC fast charging sparingly for long trips; frequent maximum-power DC fast charging can accelerate long-term degradation relative to mostly Level-2 charging.

Longevity, warranties and degradation

GM backs its battery systems with typical industry warranties (for example, an eight-year/100,000-mile warranty on many Ultium packs). Lithium-ion batteries naturally degrade over time; typical modern EV packs lose a small percentage of capacity each year depending on climate, charge habits and fast-charging frequency. NCMA-type cells are engineered for a balance of energy and cycle life — they deliver strong range early in life while GM tunes BMS behaviours and chemistry to limit capacity fade over several years.

How owners can help the battery age gracefully:

• Avoid leaving the battery at 100% for extended periods when not needed.
  
• Minimize frequent DC fast charging unless necessary.
  
• Park and charge in moderate temperatures (avoid extreme heat exposure when possible).
  
• Use scheduled charging features to top up just before planned departures.

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Future improvements and chemistry road-map

Battery technology is evolving rapidly. GM’s Ultium program continues to test and plan multiple chemistries and cell formats — from nickel-rich NCMA to manganese-rich LMR designs and LFP lines for low-cost applications. That roadmap means future Equinox or other Chevrolet models could receive packs with improved energy density, lower cost, or better cycle life as those chemistries scale. For owners, that means the platform is designed to accept future improvements while keeping the current vehicle upgrade path open through software and pack-level refinements. 

Final thoughts — what makes the Equinox EV battery noteworthy?

• Practical long range at an accessible price: the combination of a high-energy Ultium pack, efficient drive-train, and vehicle packaging yields competitive real-world range figures for the segment.

• Large-format pouch cell design: fewer parallel strings, simpler module design and efficient thermal management offer cost and packaging benefits.

• Flexible chemistry roadmap: GM’s willingness to use NCMA now and add LFP/LMR later gives the company options to optimize cost, performance, and supply-chain resilience.

Quick owner checklist

• Charge overnight using Level 2 where possible (set to ~80–90% for daily driving).
  
• Use DC fast charging for trips and occasional needs; expect tapering above ~70–80% SoC.
  
• Avoid exposing your vehicle to prolonged extreme heat; park in shade or a garage when possible.
  
• Keep software updated — BMS and vehicle software updates can improve charging behavior and longevity.