40°C Phase-Change Material PCM Battery

The DM-BLC-40 is a passive PCM (Phase-Change ) battery constant-temperature module designed for low-temperature regions, fast-charging scenarios, portable energy storage and two-/three-wheeled electric-vehicle battery applications. With a nominal 40°C phase-change point, it is designed to prioritize thermal buffering and heat release during cold conditions while also absorbing excess heat during high-rate charging and operation.Passive PCM Thermal Management for Cold-Climate & Fast-Charging Battery Applications

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Why This PCM Module?

The module uses phase-change latent heat to passively buffer battery temperature fluctuations. It is designed as a low-complexity thermal-management option for battery systems where energy consumption, noise, maintenance and installation space are important considerations.

Key Features

•Passive operation:
No external power supply, fans, pumps or wiring are required for the PCM thermal-management function.

•Bidirectional thermal buffering:
Absorbs excess heat as temperature rises and releases stored thermal energy as temperature falls.

•Thin module design:
Standard thickness options of 6 mm, 8 mm and 10 mm support space-constrained battery-pack integration.

•Sealed structure
Aluminum housing encloses the PCM core and internal thermal-conduction/guiding layer.

•Low maintenance:
No circulating coolant, pump or fan is required, reducing mechanical components and maintenance requirements.

•Customizable:
Dimensions can be customized to the customer's battery-pack geometry.

Working Principle

At elevated battery temperatures, the PCM absorbs thermal energy around the nominal 40°C phase-change point, helping buffer temperature rise. As temperature falls, the PCM releases stored thermal energy, providing passive thermal buffering. The actual temperature profile and thermal-management effect depend on the battery chemistry, pack design, heat generation rate, ambient conditions and module configuration.

Product Positioning & Selection

The 40°C model is intended for low-temperature regions, northern winter markets, portable outdoor energy storage and high-rate fast-charging scenarios.

Recommended positioning: Low-Temperature Model within the DM-BLC series.

Product Specifications

Parameter	Value	Test
Model	DM-BLC-40	Product series information
Nominal phase-change temperature	40°C	Product specification
Operating mode	Passive thermal management	No external power supply required
Thickness	6 / 8 / 10 mm	Standard options
Base structure	Aluminum housing with PCM core and thermal-conduction/guiding layer	Series module structure
Protection rating	IP54	Module body
Operating environment	-20°C to +65°C	Series module operating environment
Dimensions	Standardized or customized	Customized to battery-pack structure
Weight	Custom per specification	Depends on final module dimensions
Form	Sheet module	Series product form
Compatible battery	Prismatic and pouch lithium-ion batteries; customized configurations can be developed for other battery-pack structures.	Final compatibility subject to pack design

Thermal Management Comparison

Dimension	Natural Cooling	Air Cooling	Liquid Cooling	PCM Module
External energy consumption	None	High	High	None
Maintenance	Low	Medium	High	Maintenance-free
Structural complexity	Low	Medium	High	Low
Noise	None	Yes	Pump noise	None
High-temperature heat absorption	Poor	Medium	Excellent	Excellent
Winter insulation	None	None	Additional heating may be required	Excellent
Temperature uniformity	Poor	Medium	Excellent	Excellent

Available Series

Model	Phase-Change Temp.	Thickness	Compatible Battery	Typical Applications
DM-BLC-40	40°C	6/8/10 mm	Prismatic / pouch	Low-temperature regions, portable storage, fast charging
DM-BLC-42	40–42°C peak	6/8/10 mm	21700 cylindrical / prismatic	Two-wheelers, energy-storage cell spacers
DM-BLC-45	45°C	6/8/10 mm	21700/Prismatic / pouch	Two-wheeled EV battery packs, residential storage
DM-BLC-50	50°C	6/8/10 mm	Prismatic / pouch / cylindrical	Special power supplies, high-temperature applications
Custom Model	On demand	On demand	All cell types	Custom molded to customer battery pack

Performance Data Available in the Product Materials

The supplied product materials report the following series test/reference results:

Test Item	Without PCM	With PCM	Reported Improvement
High-temperature enclosed-space peak temperature (24 h)	≈57°C	<40°C throughout	≈19°C / 33% reduction
Battery-pack temperature gradient	Baseline	Reduced	50% reduction
Peak temperature (graphite uniformity test)	Baseline	Reduced	8°C reduction
21700 four-cell discharge peak	≈65°C	≈45°C	≈20°C suppression
Heating/cooling cycle stability	—	Stable	50,000 cycles

Important: These results should be presented as test/reference data under the stated conditions, not as universal guaranteed performance. The source material specifically notes that the 21700 peak values were read approximately from TDS curves.

All-Category Application Scenario Map

Covers 13 sub-scenarios across three categories — mature mass production, rapid growth, and blue-ocean expansion — and fits almost all lithium-battery-powered products.

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Customization

Customized length and width
6 / 8 / 10 mm standard thickness options, with project-specific customization subject to engineering review
Battery-cell configuration and pack geometry
Installation/interface requirements
Thermal-management design according to customer battery-pack requirements

Safety & Environmental Information

UL-94 HB flame-retardant rating is stated in the product materials.
RoHS and EU REACH compliance is stated in the product materials.
Partial UN38.3 testing for battery transport safety has passed.
Final certification and compliance scope should be confirmed for the final product configuration and application.

Request a Customized PCM Battery Thermal Management Solution

Contact us for product dimensions, technical specifications, sample evaluation and customized PCM module solutions based on your battery-pack design.