Name: Battery Liquid Cold Plates | EV Thermal Solutions for Batteries
Brand: GUCHEN
Rating: 5 (85 reviews)

Overview of Liquid Cold Plates for Battery Cooling

What is a liquid cold plate?

A battery liquid cold plate is a component in the battery thermal management system that directly exchanges heat with the battery.
The components of a liquid cold plate usually include: liquid cold plate flow channels, structural support components, coolant inlet and outlet nozzles, as well as insulating paint or insulating film on the parts that come into contact with the battery module.

How do liquid cold plates work?

The cooling principle of the battery liquid cold plate is to machine flow channels inside a metal plate. Electronic components are mounted on the surface of the water-cooled plate, and a thermal conductive medium is applied between them. The coolant flows into the plate through the inlet and exits from the outlet, carrying away the heat conducted from the components.
According to different shapes and structures, the common types of liquid cold plates on the market include serpentine tube type, stamping type, extrusion type, and expansion type.
In the field of new energy vehicles, the battery liquid cold plate, as a component in the battery thermal management system that directly exchanges heat with the battery, transfers heat generated by the battery to the cooling device through the coolant in the flow channels of the liquid cold plate, or delivers heat to the battery through the coolant. This keeps the battery temperature within the optimal working range of 20°C to 35°C.

Why Choose GUCHEN Liquid Cold Plate Technology

· Surface insulated coating treatment to meet 3500V insulation withstand voltage requirements.

· Internal flow channel plates use highly corrosion-resistant materials with excellent corrosion resistance.

· Burst pressure > 0.8 MPa, static pressure resistance 0.4 MPa, deformation less than 0.5 mm, flow resistance less than 25 kPa (25℃/18 L/min).

Liquid Cooling Plate Flow Channel Design

Type

No .

Heat Spreader Plate (Thickness)

Flow Channel Plate (Thickness)

Flow Channel (Width)

Flow Channel (Depth)

Stamping Radius

Deformation under Pressure

Liquid Cooling Plate

1.5mm

1mm / 1.2mm

＜35mm

3 / 3.5 / 4

≥3.5mm

≤0.3mm

1.2mm

1mm / 1.2mm

＜30mm

3 / 3.5

≥3mm

≤0.3mm

1mm

0.8mm / 1mm

＜26mm

3 / 3.5

≥3mm

≤0.3mm

Cold Plate Forming Simulation
Flow Channel Plate Stamping Thinning Analysis	Thinning Rate ＜20%

Battery Liquid Cold Plate Solutions

Static Pressure and Flow Field Simulation of Liquid Cold Plate

Solder and Welding Surface Design

Introduction to cold plate manufacturing capabilities（1）


Cold Plate Stamping Line		Brazing Furnace No.1		Brazing Furnace No.2
Stamping Cycle Time	50 seconds	Cycle Time	50 seconds	Cycle Time	50 seconds
Daily Production Capacity	1,400 units	Daily Production Capacity	1,400 units	Daily Production Capacity	1,400 units

Introduction to cold plate manufacturing capabilities（2）


Brazing Flux Spraying Line		Helium Leak Detection Line No. 1		Helium Leak Detection Line No. 2
Cycle Time	Daily Production Capacity	Cycle Time	Daily Production Capacity	Cycle Time	Daily Production Capacity
36s	2000 sets/day	50s	1400 sets/day	50s	1400 sets/day

Automation


Most products on the production site are equipped with semi-automatic assembly fixtures to ensure consistency in cold plate assembly	Spraying line automation upgrade: robotic loading of cold plates and automatic laser marking have been implemented

Simulation Capability

One-dimensional and three-dimensional thermal management systems and components are applied for multi-physical field coupling, dynamic simulation, and NVH (Noise, Vibration, and Harshness) simulation using GT-SUITE and Dymola.

How do you ensure the air-tightness of liquid cooling plates?

All of our products undergo 100% nitrogen leak testing before leaving the factory. In addition, during the production process, dry testing is carried out to evaluate welding quality, and water testing is used to detect potential welding defects.
All these inspections are implemented to prevent defective products from entering the next production stage.

Development Content and Requirements of GUCHEN Battery Pack Liquid Cooling System

① Conduct research on different manufacturing processes of liquid cooling plates for your project, and compare the advantages, disadvantages, costs, and applicable scope of different liquid cooling structures.
② Develop flow channel designs flexibly based on your application field, selecting liquid cooling systems with stronger adaptability and higher heat exchange efficiency. Cooling and heating rates can be customized upon request (e.g., not less than 1℃/min).
③ Develop liquid cooling systems with better temperature uniformity (e.g., during cooling, the temperature difference of the battery pack does not exceed 5℃; during heating, the temperature difference does not exceed 8℃).
④ Develop more reliable liquid cooling systems (e.g., withstand pressure above 350 kPa, service life up to 10 years; total flow resistance of the liquid cooling system within the range of 20–30 kPa).

Mass-Produced Battery Cold Plates in Various Structures

Extruded Cold Plate Platform

-Simple structure, easy to manufacture

-High heat transfer performance, good temperature uniformity

-High strength, can serve as a structural component

-Relatively thick and heavy, higher cost

Stamped Liquid Cold Plate

-Produced by stamping, low batch production cost

-Low flow resistance; performance adjustable via channel width or added internal fins

-Lightweight

Lightweight Harmonica Tube Platform

-Simple structure

-Requires integration with a thermal spreader plate

-Lightweight, supports lightweight design

Microchannel Direct Cold Plate Platform

-Simple structure

-Good temperature uniformity, comes with built-in thermal spreader

-Low strength, prone to deformation, should be placed at the bottom of the module

-Lightweight

Battery Liquid Cold Plates

Overview of Liquid Cold Plates for Battery Cooling

What is a liquid cold plate?

How do liquid cold plates work?

Why Choose GUCHEN Liquid Cold Plate Technology

Liquid Cooling Plate Flow Channel Design

Battery Liquid Cold Plate Solutions

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