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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
Juno New Energy’s “zero-defect” philosophy: A quality long march for a single battery pack
time：2026-07-30
At the entrance of the new energy PACK factory, a piece of electronic screen rolled a line all the year round: "zero defect is not a goal, but a belief. "This is not a slogan, but the real journey each piece of battery pack experiences from raw materials to finished products. On this journey, 127 quality checkpoints and more than 3,000 detection points are like beacon towers, and there is no place to hide any abnormality. Today, let's follow a battery pack step and go through this long quality March.
I. Incoming materials: source interception, not allowing a "sick" cell to enter
the first step of the quality Long March began before arriving at the factory cell.
Juanneng New Energy implements the "flight inspection" system for cell suppliers-without prior notice, no route, no preset range, the audit team directly stationed in the electric core factory, from raw material warehouse to coating plant, check item by item from the process of chemical formation to the separation equipment. Suppliers whose audit pass rate is less than 70% are directly listed in the rectification list.
After entering the factory in cell, we must first go through "full inspection" rather than "spot inspection". Capacity, internal resistance, voltage, self-discharge rate, thickness, weight, six parameters are measured one by one, and data is uploaded to MES system in real time. AI algorithm automatic clustering analysis divides cell into four levels: A/B/C/D, and only A- level cell is eligible to enter the group link. "Here We ComeThe interception rate of bad materials exceeds 99.5%, but the remaining 0.5% still keeps us alert. "The incoming inspection supervisor said.
II. Process Control: Process control to nip variation in the bud
after entering the production line, quality control changes from "inspection" to "prevention".
More than 200 online detection stations have been deployed in the production line of energy gathering new energy, and data collection is completed every 15 seconds on average. Laser power, welding speed, defocus quantity of welding station, glue quantity, track and temperature of gluing station, torque, clearance and alignment degree of assembly station-real-time monitoring of all key process parameters, automatic shutdown and alarm when the control limit is exceeded.
SPC (statistical process control) is the core tool of process quality. The operation data of each key parameter is drawn into a control drawing. If the CPK (process capability index) is lower than 1.33, the process must be stopped for rectification. The internal standard of energy gathering new energy is 30% stricter than the industry general standard, and "good enough" has no place here.
What is more stringent is the "mutual inspection" system. The operator of the next process has the right to reject the defective products of the previous process and is not subject to the yield assessment. This mechanism of "downstream supervision of the upstream" breaks the inertia of the traditional production line "only one acre and three parts", and weaves the quality responsibility into a full group of participants.With the network.
3. Off-line: full test, no exit for hidden dangers
after the battery pack is offline, the 72-hour full test cycle is entered.
Electrical Performance Test covers 12 indicators such as capacity, internal resistance, energy efficiency, and self-discharge rate; Safety tests include overcharge, overdischarge, short circuit, extrusion, acupuncture, 8 abuse tests such as thermal runaway spread; Environmental tests span the temperature range from-40℃ to 85℃, superimposed composite stresses such as vibration, shock, damp heat, salt spray, etc. Each test has clear acceptance criteria. Each data must be compared with the historical database. Any abnormal trend-even if it has not exceeded the standard-will trigger a technical review.
"We have found that although the self-discharge rate of battery pack in a batch is qualified, it has risen by 0.1% compared with the historical average. Although it is still within the specification, we still started the whole batch tracing, and finally located the temperature sensor drift of a certain set of equipment. "The quality director recalled," in gathering new energy sources, anomalies are signals and trends are warnings. "
IV. Shipment clearance: the last gate, the most rigorous inspection
battery pack that pass all tests are not automatically obtained ".
Pre-shipment Audit is performed by a third-party team independent of production and inspection. They randomly selected 5% of finished products and conducted unpacking inspection, functional retesting and appearance review from the customer's perspective. If the score is lower than 95 points (out of 100), the whole batch will be reworked. The Audit team reports directly to the general manager without interference from the production department.
What is more unique is the "customer scenario simulation" test. The test database of energy gathering new energy includes the loading conditions of major customers around the world. Samples are randomly taken before shipment to simulate the customer's unique charging and discharging cycle, temperature profile and vibration spectrum. "We should not only meet the standards, but also meet the customers' 'outstandard '. "Customer Quality Engineer explains.
V. Tracing off: the whole life cycle file allows the responsibility to be traced.
Every battery pack of the new energy source has a unique "electronic ID card".
From cell incoming batch, welding parameter curve, test raw data, to shipment time, customer information, loading VIN code, all information is linked and stored, and cannot be tampered. If it appears in the marketAny quality feedback can be traced from cell raw materials to finished products within 4 hours to accurately locate problem links and responsible batches.
This traceability ability is not only used for post-event accountability, but also drives pre-prevention. The quality big data platform that gathers energy and new energy generates a "quality radar chart" every month to identify high frequency abnormal patterns, optimize reverse drive design and upgrade process. Last year, the platform found that the compression permanent deformation rate of a certain type of sealing ring was relatively high in low temperature environment, and then triggered material replacement and supplier review to eliminate the potential batch risk to the intangible.
127 checkpoints, 3000 + detection points, and full life cycle tracing-behind these numbers are energy gathering new energy the concrete expression of "zero defect" belief. There is no end to the quality Long March, and every battery pack off the line is a new starting point. In this era of pursuing speed and scale, the choice of energy-gathering new energy resources slows down, staying one second more on every detail, checking once more, and asking more questions.
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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