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Pre-research Notes on the Next-Generation Solid-State Battery Pack
time：2026-08-05
In the solid-state battery pre-research center that gathers new energy sources, a palm-sized sample is circulating in the charge-discharge test cabinet. It does not have the liquid electrolyte of the traditional battery and is replaced by the ceramic-like solid electrolyte layer. This sample has gone through 500 cycles, and the capacity retention rate is 92%-there is still a long distance from 8000 times required for commercialization. However, the engineers who gather energy and new energy know that they are standing on the threshold of "technology generation" of power batteries, and the significance of pre-research is to measure the height of this threshold in advance.
I. Temptation of solid-state batteries: why must we Cross
solid-state batteries are regarded as the "ultimate substitute" for liquid lithium batteries by the industry, and their temptation lies in triple breakthroughs.
Jump of energy density is the primary driving force. The solid electrolyte does not need a separator, and the internal space utilization rate of cell is greatly improved. The theoretical energy density can reach more than 500Wh/kg, which is nearly twice that of the existing high nickel ternary. This means that under the same weight, the battery life of electric vehicles can exceed 1,000 kilometers.
Qualitative change of security it is the second temptation. Solid Electrolyte is nonflammable and leak-free, which fundamentally eliminates the risk of thermal runaway of liquid electrolyte. In the abuse scenarios of acupuncture, extrusion, overcharging, etc., the theoretical tolerance of solid-state batteries is far away.Ultra-liquid battery.
Expansion of temperature adaptability the same key. Solid electrolyte maintains ion conduction ability in the range of-40℃ to 100℃, which solves the stubborn disease of low-temperature lithium evolution and high-temperature decomposition of liquid battery.
"But the greater the temptation, the deeper the gap. "The chief technology officer of Energy New Energy said frankly," from laboratory to mass production, the valley of death that solid-state batteries have to cross is much wider than that of liquid lithium batteries. "
II. Pre-research challenges at PACK level: Solid state is not as simple as "core change"
the pre-research team of energy gathering New Energy found that the PACK design of solid-state batteries is far from the simple "replacing liquid cell with solid-state Cell.
Interface impedance is the number one problem. The contact between solid electrolyte and electrode material is "solid-solid" interface, and the contact area and tightness are far lower than the "solid-liquid" infiltration interface of liquid battery. The experiment of energy accumulation New Energy shows that the internal resistance of solid cell without optimization is 3-5 times that of liquid cell, which is directly converted into heat generation and efficiency loss. The pre-research team is testing two schemes of "in-situ polymerization" and "interface buffer layer"-the former generates solid electrolyte in situ within cell to eliminate interface gap, while the latter is coated on the electrode surfaceThe nano-scale transition layer is covered to improve contact.
Volume expansion it is another hidden worry. The volume change rate (about 5%-8%) of solid-state battery during charging and discharging is higher than that of liquid battery (about 2%-4%), which puts forward higher requirements for mechanical fixation and thermal management of PACK. The new energy gathering Energy has developed an "adaptive clamping system", which uses shape memory alloy to automatically adjust the clamping force when the temperature changes, not only inhibiting the expansion displacement, but also avoiding the overvoltage damage.
Subversion of manufacturing process the most fundamental. The production of solid-state batteries cannot follow the mature processes such as liquid injection and formation of liquid batteries, and new lamination, pressing and sintering equipment are needed. The new energy source and equipment manufacturers jointly developed the middle test line of "dry electrode + isostatic pressing molding", aiming to 5 times the manufacturing cost of solid-state cell from the current liquid battery, gradually compress to less than 2 times.
III. Dispute over technical routes: Oxide, sulfide or polymer?
The technical route of solid electrolyte has not yet converged, and the new energy source has chosen the strategy of "multi-line parallel, key breakthrough.
Oxide electrolyte(Such as LLZO) the stability is the best, but the brittleness is high, the processing is difficult, and the interface contact resistance is large. PolyNeng new energy locates it as "medium-term reserve", focusing on thin film preparation and interface engineering.
Sulfide electrolyte(For example, LGPS) has the highest ionic conductivity, which is close to the level of liquid electrolyte. However, due to poor chemical stability and decomposition when exposed to water, extreme requirements are put forward for production environment (dew point below-60℃) and PACK sealing. The new energy source regards it as the "main direction", and has established a dedicated sulfide pilot workshop to explore large-scale manufacturing in the dry room environment.
Polymer Electrolyte(Such as PEO-based) is flexible and easy to process, but the room temperature ionic conductivity is low, and it needs to be heated to above 60℃ to work normally. The new energy source regards it as a "specific scenario scheme" and combines it with heating film technology to explore the application possibility of energy storage in northern cold regions.
"There is no perfect technical route, only the choice that best matches the application scenario. "The person in charge of pre-research stressed," Our strategy is to maintain the parallel investment of the three routes and dynamically adjust the resource ratio according to the technology maturity and cost curve. "
IV. Production schedule: from "optimistic expectation" to "pragmatic deduction"
the production schedule of solid-state batteries is the most sensitive issue in the industry.
the internal deduction of new energy sources is divided into three stages: 2027-2028, semi-solid battery (solid-liquid mixed electrolyte) is loaded in small batches with an energy density of 350-400wh/kg, which solves the endurance anxiety of some high-end models; 2030-2032, all-solid-state batteries are commercialized in specific scenarios (such as aviation and high-end passenger cars), the energy density exceeds 450Wh/kg, and the cost is reduced to twice that of liquid batteries; after 2035, all-solid-state batteries have been popularized on a large scale, and the cost is the same as that of liquid batteries, thus completing the intergenerational replacement of technology.
"This timetable is much more conservative than the market expectation of 'Mass production' in 2025. "The chief technology officer said frankly," but we would rather arrive late than go on the road with defects. It took 15 years for liquid lithium batteries to arrive today, and there is no reason for solid-state batteries to be faster. "
v. Value of pre-research: Reserve "continuous" ability for "Broken Generation"
in the strategic map of energy accumulation new energy, solid state pre-research is not "betting on the future", but "reserve capacity".
Talent reserve it is hidden income. Solid-state battery experts trained by the pre-research team are irreplaceable core assets no matter which route wins. Even if solid state electricityDue to the delay in the pool, the knowledge structure of these talents can also feed back the limit optimization of liquid batteries.
Patent layout it is a barrier to competition. The new energy source has applied for more than 200 patents in the fields of solid electrolyte formula, interface engineering, manufacturing process, PACK integration and so on, and has built a "patent moat".
Supply chain cultivation the same key. The joint development with upstream material suppliers and equipment manufacturers has locked the supply capacity of key resources in advance.
Pre-development of solid-state batteries, is an adventure racing against time. Engineers who gather energy for new energy are well aware that the samples in their hands may change the industrial pattern of power batteries in the next ten years, and may also prove to be an infeasible detour. However, the significance of pre-research lies not in "success", but in "dare to try".
When the industry is driven by the pressure of short-term performance, energy gathering new energy resources choose to retain patience and investment for "technology generation. Because we believe that the real technology leads, not standing on the top of the mountain laughing at people who are still climbing, but when others have not seen the mountain, they begin to measure its height.
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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