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RESOURCES | FREQUENTLY ASKED QUESTIONS
EV Thermal Management FAQ
Answers to common questions about battery thermal management systems, high-voltage coolant heaters, integrated controllers, electric compressors, system integration, CAN communication, customization and validation.
Use this page to prepare project inputs, compare solution routes and identify what must be confirmed for a specific EVLINK product model or application.
A BETTER TECHNICAL CONVERSATION
Start With Complete Project Inputs
The most useful answers begin with the real voltage window, thermal target, operating conditions, installation interfaces, control requirements and validation stage.
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Buyer and engineering questions
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Decision-focused categories
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Clear project pathway
FAQ TOPICS
Find Answers by Product and Project Stage
Each answer explains the decision path. Final suitability depends on the selected model and verified project inputs.
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Starting a Project
Required inputs, product selection and first engineering review.
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High Voltage Coolant Heaters
Voltage, power, coolant, application and selection questions.
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Controllers & Compressors
Integrated control, CAN, cooling circuit and product inputs.
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Customization & Engineering
Scope, drawings, interfaces, prototypes and deliverables.
STARTING A PROJECT
Project Definition & Product Selection FAQ
Better inputs at the beginning reduce repeated selection, drawing and prototype changes.
Provide the vehicle or equipment platform, application and duty cycle, battery or thermal-load data, high- and low-voltage levels, heating or cooling target, ambient and fluid conditions, installation space, ports, connectors, CAN requirements, validation criteria, timing and expected demand.
Voltage and power are not enough for a reliable selection. Coolant or refrigerant conditions, flow, pressure, inlet temperature, ambient, installation, connector, CAN, duty cycle and validation requirements may change the suitable model.
The most useful review normally includes the customer thermal or system engineer, electrical or controls engineer, packaging engineer, project owner and purchasing representative, together with the relevant EVLINK product and engineering contacts.
The normal workflow is requirement collection, product selection and sizing, technical proposal, interface definition, CAN matching, prototype delivery, validation, design optimization and production-release documentation. The exact scope should be agreed for each project.
Yes. A project may begin with a battery thermal management system, high-voltage coolant heater, three-in-one controller or electric compressor. System interfaces still need to be reviewed so the selected component works correctly in the customer’s architecture.
Consider customization when a standard model cannot meet a documented voltage, capacity, installation, port, connector, control or environmental requirement. The preferred route is the lowest-risk configuration or interface change that satisfies the requirement.
BATTERY THERMAL MANAGEMENT
Battery Thermal Management System FAQ
BTMS selection must follow the battery duty, charging profile, thermal load and vehicle interfaces.
A battery thermal management system coordinates battery heating and cooling so the battery can remain within the temperature range required for driving, charging, storage and durability under defined operating conditions.
Cooling manages heat generated during charging and high-load operation. Heating or preconditioning supports cold-start performance and charging when the battery is below its required operating range.
Provide battery capacity and chemistry, allowable temperature range and uniformity, heat-generation or charging profile, ambient range, heating and cooling targets, coolant data, installation space, voltage, communication requirements and operating duty.
The included components and control boundary vary by product model and project. Confirm the exact bill of materials, external components, sensor ownership and vehicle interfaces before selection.
Preconditioning can be planned when the battery, vehicle control strategy and selected BTMS support the required heating or cooling mode. The target, timing, available power and control ownership must be defined.
Refrigerant, coolant type, concentration, compatibility, flow and pressure limits are model-specific. Use only the fluids and operating conditions confirmed in the applicable technical data and project review.
HIGH VOLTAGE COOLANT HEATERS
HVCH Selection & Integration FAQ
Product suitability depends on the complete voltage, thermal, fluid, installation and control requirement.
A high-voltage coolant heater converts electrical energy into heat transferred to a liquid-coolant circuit. It can support battery preconditioning, cabin heating or another approved thermal loop depending on the vehicle architecture.
A PTC heating element has a temperature-dependent resistance characteristic. The complete product also depends on its power electronics, sensors, coolant conditions and software control. Model-specific behavior should be confirmed in the technical data.
A heater may serve one or more thermal loads when the system architecture, valves, pumps, controls and capacity are designed for those modes. The component alone does not define the complete thermal strategy.
Use the real HV operating range, required heat load, coolant inlet condition, flow, ambient, warm-up target, available electrical power, duty cycle and control strategy. Do not select only from nominal pack voltage.
Compatibility depends on the actual voltage window and selected product series. Provide minimum, nominal and maximum operating voltage so EVLINK can confirm a suitable model rather than relying on a platform label.
Confirm coolant type and concentration, inlet temperature range, target outlet or heat duty, flow range, pressure, pressure drop requirement, port definition, hose routing and filling or bleeding constraints.
Protection, commands, feedback, states, fault codes, timeouts and diagnostic functions vary by model. They should be reviewed using the applicable product documentation and customer communication requirements.
CONTROLLERS & ELECTRIC COMPRESSORS
Integrated Control and Cooling FAQ
Confirm functions, interfaces and operating conditions at model level.
It is an integrated high-voltage and thermal-control product family intended to coordinate functions such as HVCH, BTMS and electric-compressor control in a compact architecture. The exact three functions and interfaces must be confirmed by model.
No. Supported loads, voltage and current, connectors, cooling, CAN or CAN FD, protection and physical interfaces may vary. Use the model drawing and interface document for project decisions.
An electric compressor drives refrigerant compression for battery and/or cabin cooling circuits without relying on an engine-driven belt. The complete cooling capacity depends on operating conditions and system design.
Provide voltage range, cooling-load target and test condition, refrigerant and oil, speed or control requirement, suction and discharge conditions, installation, connector, three-phase cable, CAN, ambient, NVH and validation requirements.
The control relationship depends on the controller model, compressor interface, CAN definition and vehicle architecture. Commands, feedback, limits, states, faults and responsibility boundaries should be agreed before integration.
Not reliably. Cooling capacity changes with refrigerant, speed, evaporating and condensing conditions, superheat, power limits and system losses. Compare products at the same defined test condition.
SYSTEM INTEGRATION & CAN
Mechanical, Fluid, Electrical and Communication FAQ
Most integration problems occur at the boundaries between products and vehicle systems.
Review the installation envelope, mounting points, orientation, service clearance, coolant or refrigerant ports, flow direction, hose routing, HV/LV connectors, interlock, grounding, harness, CAN and diagnostic access.
Drawing availability and release status depend on the selected model and project phase. Confirm the correct revision, units, connector orientation, keep-out zones and permitted use before packaging approval.
Provide the communication protocol or DBC requirements, baud rate, node and message ownership, commands, feedback, units, scaling, states, timing, timeout, fault handling, diagnostics and software-change process.
CAN matching can be reviewed for the selected product and agreed project scope. Feasibility depends on product software architecture, required signals, diagnostics, timing and validation responsibilities.
Control ownership must be defined in the system architecture. The BTMS or controller may manage certain devices or modes, while the BMS, VCU or another controller may retain supervisory authority.
For each fault, define detection condition, debounce, message, component response, vehicle response, recovery or restart logic, diagnostic visibility and the party responsible for validation.
CUSTOMIZATION & ENGINEERING
Custom EV Thermal Product Development FAQ
Customization should solve a confirmed platform constraint through a controlled engineering route.
Depending on feasibility and model, customization may cover rated configuration, package, mounting, coolant ports, HV/LV connectors, CAN communication, operating modes, protection logic, documents and validation. The final scope must be agreed.
No. The preferred route is an existing configurable product, followed by controlled interface adaptation when needed. Platform-specific development should be used only when the requirement cannot be met otherwise.
Potential deliverables include a technical solution proposal, selection and sizing results, 2D/3D drawings, installation interfaces, electrical connections, CAN documentation, prototype samples, validation information and production-delivery documents.
EVLINK can support product and thermal-system engineering within an agreed scope. Do not assume complete vehicle calibration or full-vehicle responsibility unless the project contract and capability review explicitly define it.
Missing or changing inputs should be recorded as assumptions, assigned an owner and closed before they affect product release. Drawings, software, sample configuration and requirements should use controlled revisions.
Confidentiality, document access, permitted use, customer IP and publication rights should be defined contractually. Public case studies or customer names require separate approval.
PROTOTYPE, VALIDATION & QUALITY
Test Evidence and Product Release FAQ
Validation must connect the requirement, sample configuration, conditions, evidence and decision.
An engineering sample may support feasibility and early integration. A validation sample should have a controlled hardware, software and configuration status suitable for an approved test plan. Production-intent status must be confirmed separately.
Link each requirement to the sample and revision, test method, operating conditions, instrumentation, measured channels, acceptance criteria, result, issue and release decision.
Do not assume that every test or standard is available internally. The required test scope, facility, accreditation, third-party role and report format must be confirmed for each project.
Typical data may include coolant temperatures, ambient, flow, pressure, voltage, current, power, commands, feedback, operating state, faults, sample revision, instruments, calibration and deviations. The exact channels depend on the requirement.
Record the failed requirement, conditions and configuration; contain the issue; determine root cause; define corrective action; update the controlled design or software; retest affected and regression conditions; approve closure evidence.
Certification and compliance are model-, entity-, market- and date-specific. Request the current certificate or report for the exact product and confirm its scope and validity before publishing or approving it.
COMMERCIAL & APPLICATIONS
Samples, Timing, Pricing and Application FAQ
Commercial answers become reliable only after the product configuration and project scope are clear.
MOQ depends on the product model, configuration, prototype or production status, tooling and commercial agreement. Confirm it after the technical configuration is identified.
Timing depends on requirement completeness, model availability, customization, components, drawings, software, sample quantity, validation and production status. Request a project-specific schedule.
Pricing depends on the confirmed model, configuration, quantity, validation and documentation scope, tooling or development work, delivery terms and commercial conditions. A complete requirement produces a more reliable quotation.
Prototype support may be included after technical and commercial review. The sample purpose, configuration, quantity, documentation, validation responsibility and release status should be stated clearly.
Planned application pathways include electric buses, electric trucks, electric mining trucks, construction machinery, agricultural machinery and data-center liquid cooling. Final suitability depends on the product model and verified project conditions.
Send the project inputs through the EVLINK contact page and identify whether the request is for product selection, system integration, custom development, prototype validation or production supply.
PROJECT PREPARATION
Prepare These Inputs Before Contacting EVLINK
A complete input package helps EVLINK identify the correct product, unanswered assumptions and next engineering review.
- Vehicle or equipment platform and target market
- Application, duty cycle and charging profile
- Battery data and thermal-load target
- High-voltage and low-voltage operating ranges
- Ambient, coolant and refrigerant conditions
- Installation envelope, orientation and mounting
- Coolant/refrigerant ports, flow and pressure
- HV/LV connectors, interlock, grounding and harness
- CAN protocol, commands, feedback, faults and diagnostics
- Customer standards and validation requirements
- Prototype timing, project milestones and annual demand
- Required documents, approval contacts and confidentiality status
CONTINUE YOUR RESEARCH
Move from FAQ to Detailed Technical Information
FAQ answers should guide the next decision, not replace product data, drawings or project reviews.
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Applications
Explore commercial EV, off-highway, agricultural and liquid-cooling applications.
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Engineering Services
Review system design, custom development and prototype-validation support.
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Technical Insights
Read deeper guides about selection, integration, CAN and validation.
STILL HAVE A QUESTION?
Discuss Your EV Thermal Management Requirements
Share the platform, voltage, thermal target, installation space, coolant or refrigerant, connectors, CAN requirements, validation stage and timing.