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Dongguan Juneng New Energy Technology Co., Ltd.
137 5142 6524（Miss Gao）
susiegao@power-ing.com
Xinghuiyuan High tech Industrial Park, Dalang Town, Dongguan City, Guangdong Province
The “Hidden Champions” Behind the Cost War: JuNeng New Energy’s Philosophy of Structural Adhesive Selection
time：2026-07-30
In the cost dismantling of power battery PACK, structural adhesive usually accounts for less than 3%, but undertakes multiple missions such as structural fixation, heat conduction, insulation, flame retardant, Buffering, etc. The selection deviation of one gram of glue may evolve into cell shift, thermal management failure or even safety accident ten years later. In the laboratory of energy gathering and new energy sources, the selection of structural adhesive is never an extensive decision of "applying glue casually", but a microscopic game related to the value of the whole life cycle.
I. "triple identity" of structural adhesive: fixation, heat conduction and protection
in the PACK design of energy gathering new energy, structural adhesive is not a single bonding material, but a functional interface with several roles.
Structural fixation it is the basic responsibility. Between cell and module frame, module and box, structural adhesive replaces traditional mechanical fastening and realizes high-strength connection in limited space. The Soft Pack cell module of energy gathering new energy adopts structural adhesive laminated fixed, and the shear strength must be greater than or equal to 8MPa to ensure that there is no layering and no slip under the vibration condition of 100000 kilometers of the whole vehicle.
Heat conduction interface is an advanced role. In the liquid cooling scheme, the structural adhesive fills the microscopic gap between cell and liquid cold plate, reducing the thermal resistance from 0.1m² · K/W of the air layer to 0. 003m² · K/W or less. The efficiency of one gram of high thermal conductive adhesive may exceed the heat dissipation contribution of several centimeters of metal materials.
Flame retardant buffer it is the bottom line of security. Structural adhesive should play the role of flame retardant and heat insulation when the heat of cell is out of control and delay the spread of heat; At the same time, it should absorb energy during mechanical impact and protect cell from rigid collision.
"Structural Adhesive is PACK's" invisible skeleton '. "The energy-gathering new energy material engineer compared," it can't see, but without it, the whole system will fall apart. "
II. Selection philosophy: not "the most expensive and best", but "the best match"
facing dozens of structural adhesive products in the market, energy gathering new energy has formed a unique selection logic.
Working condition matching takes precedence over parameter comparison. The thermal conductivity of an imported adhesive is as high as 6W/(m · K), but the hardness is relatively high after curing, and stress concentration is easy to occur in the cell expansion cycle. Through simulation and measurement, the new energy source selects products with a thermal conductivity of 4w/(m · K) but a lower elastic modulus, which achieves a balance between heat dissipation and stress release. "The numbers on the parameter table are static, and the 'breath' of cell is dynamic. "MaterialMaterial engineer stressed.
Long-term aging performance is more important than initial strength. After the structural adhesive is aged in the environment of 85℃/85% RH for 1000 hours, the shear strength retention rate should be ≥80%. Energy gathering new energy has established an accelerated aging database to track candidate glues for more than 2000 hours, eliminating products with cliff-like performance attenuation after half a year.
Process suitability determines the feasibility of mass production. The curing condition of a certain type of glue with excellent performance requires 80℃/4 hours, which is difficult to fall under the constraint of production line beat. The energy gathering new energy and glue factory jointly develop the low-temperature fast-fixing formula to optimize the curing conditions to 60 ℃/1.5 hours while keeping the performance unchanged and realizing seamless migration from the laboratory to the production line.
III. Gluing technology: from "Empiricism" to "Digitalism"
choose the right glue, apply the right place, the same key.
The gluing production line of energy gathering new energy is equipped with visual guiding robot, and the width, height and trajectory accuracy of adhesive strip are controlled within ± 0.1mm. AI algorithm monitors the continuity of adhesive strips in real time, and automatically alarms for glue breakage, bubbles, and over cemented. Battery pack glue coating data per piece-& mdash; The usage, speed, temperature, and pressure-all are archived and bound to the QR code to achieve tracing throughout the life cycle.
"Gluing is not 'Putty wiping ', but precision manufacturing. "The process supervisor shows the SPC control chart," If the deviation of glue quantity exceeds 5%, we will start the root cause analysis-is it the abrasion of the pump body? Or temperature fluctuation? Data does not lie. "
finer control is reflected in the "gradient gluing" technology. Cell heat generation in the central area is concentrated, and the coating thickness is increased by 20% to strengthen heat conduction; The heat load in the Edge area is low, and the coating is thinned to control the weight. This glue coating strategy of "adjusting measures to local conditions" increases the thermal equilibrium of the whole package by 15% and reduces the glue consumption by 8%.
IV. Cost game: Cost reduction and efficiency increase from the perspective of the whole life cycle"
under the pressure of cost, structural adhesive is often regarded as "cost reduction space". The perspective of gathering energy and new energy is just the opposite.
Glue quantity Reduction & ne; Cost reduction. In order to save glue consumption, a project reduced the coating thickness from 2mm to 1.5mm. As a result, the temperature difference of cell exceeded the standard, the cycle life decay accelerated, and the whole life cycle electric cost increased by 12%. New energy sources insist on "The amount of necessary glue cannot be saved, and the amount of redundant glue should be cut down firmly.""Principle, optimize the gluing path through simulation, and reduce the glue consumption to the theoretical minimum on the premise of ensuring the performance.
Domestic replacement & ne; Performance compromise. Gather Energy new energy and establish a joint laboratory with local glue factory to develop customized products for energy storage scenarios. After three years of verification, domestic structural adhesives have been compared with imported products in terms of key performance indicators, the cost has been reduced by 30%, and the response speed of the supply chain has been shortened from 8 weeks to 2 weeks.
One gram of structural adhesive, carrying power battery PACK safety, service life and cost. In the selection philosophy of energy-gathering new energy, there is no "all-purpose adhesive", only "scenario optimal solution"; There is no "parameter first", only "full life cycle value". When the industry falls into a vicious circle of "decreasing and thinning" in the cost War, the new energy source chooses to return to the essence of material science-understanding the molecular structure, curing mechanism and aging behavior of each gram of glue, let micro-decision-making support macro-value.
Contact us
Dongguan Juneng New Energy Technology Co., Ltd.
137 5142 6524（Miss Gao）
susiegao@power-ing.com
Xinghuiyuan High tech Industrial Park, Dalang Town, Dongguan City, Guangdong Province
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