Battery Thermal Management Systems for Electric Buses & Trucks

What is a Battery Thermal Management System?

A Battery Thermal Management System (BTMS) controls battery temperature by managing heat transfer between the battery pack and the coolant system. Active systems can use liquid cooling, refrigeration and heating functions to maintain the required battery operating temperature.

How does an EV Battery Thermal Management System work?

Heat from the battery is transferred to the coolant through the battery cold plate. The coolant circulates through the BTMS, where heat is removed through a refrigeration circuit before the cooled fluid returns to the battery.

What BTMS cooling capacities are available?

EVLINK currently offers multiple BTMS cooling capacities, including 3kW, 5kW and 12kW, for different battery thermal load requirements.

Does the BTMS provide both cooling and heating?

It depends on the model. Heating is optional on the LDC502HA-5KW, 6kW PTC heating is standard on the LDC560HA-5KW, and 8kW PTC heating is standard on the LDC280HA-12KW, while the 3kW model supports an optional external heating configuration.

Does the BTMS support CAN communication?

Yes. CAN communication is supported for vehicle-level system control, monitoring and thermal management coordination.

How do I select the correct BTMS capacity?

Selection should consider battery heat load, heating requirements, voltage platform, coolant flow, ambient temperature, installation space and communication requirements.

Can the BTMS be customized?

Project-specific integration can be evaluated according to vehicle voltage, coolant circuit, interfaces, communication requirements and installation conditions.

What information should I provide for BTMS selection?

Please provide your battery voltage, thermal load, cooling and heating requirements, coolant flow, installation space, ambient operating conditions and CAN communication requirements.

What high-voltage platforms do EVLINK BTMS units support?

The high-voltage input range depends on the selected BTMS model and configuration. Provide the minimum, nominal and maximum battery voltage so EVLINK can confirm the applicable input range before selection.

What protection rating do the BTMS units carry?

The supplied BTMS product specifications list IP67. Confirm the rating for the selected configuration, including connector sealing and installation requirements. An enclosure rating does not replace the approved vehicle cleaning and service procedures.

How much PTC heating capacity is available?

The LDC560HA-5KW configuration includes 6kW PTC heating as standard, and the LDC280HA-12KW configuration includes 8kW PTC heating as standard. Heating is optional on the LDC502HA-5KW. The 3kW model supports an optional external heating configuration. Confirm the selected arrangement; the heating rating alone does not establish battery warm-up time.

What tests does an EVLINK BTMS pass before delivery?

Confirm the test scope and records applicable to the selected model and revision before delivery. The review should identify cooling and heating performance conditions, fluid measurements, communication checks and any project-specific validation still required. Ask which checks apply to the design and which apply to the delivered unit.

How is BTMS durability verified?

Agree the durability requirements, test conditions, duration and acceptance criteria for the intended duty cycle. Review the applicable reports against the selected product revision and identify any additional vehicle-level testing needed. A general description of thermal cycling is not a service-life guarantee.

Can EVLINK test a BTMS against our own protocol?

Submit your protocol with the RFQ, including performance points, test conditions, instruments, responsibilities and acceptance criteria. Ask EVLINK to confirm the feasible scope, required facilities, timing and documentation before committing to samples.