BESS cabinets, battery enclosures and charger housings in 1.5–2.0 mm — flat enough to seal, fast enough to keep up with a product range that changes every quarter.
Energy storage and EV charging enclosures sit at the heavy end of the thin-sheet window. Cabinet bodies, doors and internal partitions are typically 1.5 to 2.0 mm cold-rolled or galvanised steel, because the enclosure carries weight, resists impact and has to seal to an IP rating. That thickness makes the frame choice non-negotiable: a cast-iron frame panel bender is rated to 2.0 mm cold-rolled at full bend length, a welded frame only to 1.5 mm.
The other defining feature is change. Product generations in this sector turn over faster than in any traditional cabinet industry, and enclosure designs are revised while the first batch is still shipping. That rules out anything tool-dependent. A Poinçonneuse à tourelle CNC produces cable entries, ventilation patterns, fan cut-outs, busbar clearances and mounting arrays without dedicated dies; a cintreuse de panneaux forms the four-sided panels from a program; both switch to a revised drawing in minutes rather than through a tooling order.
STON CNC (Qingdao Ston Mechanical Technology Co., Ltd.) est un fabricant chinois de cintreuses de panneaux CNC et de presses à poinçonner à tourelle, fondé en 2006 à Qingdao, en Chine. Tous les équipements décrits ici sont fabriqués au sein même de l'usine de STON CNC, d'une superficie de 20 000 m², depuis la coulée et le traitement thermique jusqu'à l'usinage, l'assemblage et le contrôle qualité. Les machines sont certifiées ISO 9001 et portent le marquage CE conformément à la directive Machines 2006/42/CE ; elles sont exportées vers plus de 80 pays. Consulter les certifications et les brevets →
Battery and charger enclosures concentrate their sheet metal in a small number of large, thick-gauge panels that must stay flat enough for a gasket to seal against.
A door that bows by two millimetres will not seal, whatever gasket you specify, and the ingress test fails at the corners first. Closed-loop servo bending with rapid compensation adjustment holds angle across the full length, and straightness of roughly 0.2 mm/m keeps the sealing face straight enough for compression to be even along the whole channel.
Cell formats, converter footprints and connector positions move between product generations. Any process that requires a dedicated die per hole pattern becomes a schedule risk. Turret punching and program-driven bending absorb a revised drawing in an afternoon; the constraint becomes engineering time, not tooling lead time.
A cast-iron frame panel bender reaches 2.0 mm cold-rolled at full bend length; a welded frame stops at 1.5 mm. Enclosure specifications regularly drift to 2.5 or 3 mm for structural bases and outdoor cabinets. Those parts belong on a press brake, and we confirm which of your parts fall on each side before quoting.
This sector rewards flexibility over raw throughput. Most customers are better served by a cell that absorbs design changes than by a line optimised for a product that may be superseded.
The thickness row is where most enquiries in this sector fall over. Outdoor and structural enclosure parts drift above the panel bender window more often than customers expect.
| Paramètres | Panel bender — cast frame | Panel bender — welded frame | Remarques |
|---|---|---|---|
| Cold-rolled / galvanised | ≤2.0 mm | ≤1.5 mm | Above 2.0 mm goes to a press brake |
| Acier inoxydable | ≤1.2 mm | ≤1.0 mm | For outdoor and coastal enclosures |
| Aluminium | ≤2.5 mm | ≤2.5 mm | En fonction de l'alliage |
| Dimensions maximales de formage | 1000 × 1000 up to 2800 × 1500 mm | Par modèle | |
| Hauteur de flexion | 5 mm au minimum / 170, 300 ou 400 mm au maximum | Par configuration | |
| Min four-sided inner size | approx. 140 × 190 mm | Busbar shrouds may fall below this | |
| Précision angulaire | approx. ±0.5°/m | Decides gasket compression evenness | |
| Rectitude | environ 0,2 mm/m | Decides whether the door seals | |
| Punching accuracy | ±0.1 mm on turret punch press | Repeatability approx. ±0.01–0.02 mm | |
| Services publics | Triphasé 380 V, air comprimé à 0,6 MPa | Réglé sur la tension de destination | |
Four-sided cabinet bodies, doors and partitions in 1.5–2.0 mm, with dense cut-out patterns that change between product generations. The combination of thick-gauge forming and tooling-free punching is exactly what this sector needs.
Deep-drawn battery module shells, extruded heat sink profiles, roll-formed frame sections, and any structural part above 2.0 mm cold-rolled at full bend length. Different processes and in most cases different suppliers.
Structural bases in 2.5–3 mm, lifting lugs, heavy mounting brackets and thick reinforcement plates. Every enclosure factory we work with keeps a press brake for precisely these.
L'évaluation des risques suit EN ISO 12100; les fonctions de commande liées à la sécurité, telles que l'interruption par barrière lumineuse et l'arrêt d'urgence, sont définies pour EN ISO 13849-1. Les presses plieuses hydrauliques fournies dans l'UE sont fabriquées conformément à EN 12622. Les machines mises sur le marché de l'UE portent le marquage CE conformément à Directive 2006/42/CE relative aux machines accompagné du dossier technique correspondant. Le système de gestion de la qualité est certifié selon ISO 9001, et les tolérances d'usinage des pièces structurelles sont les suivantes : ISO 2768. For the finished enclosure, IEC 60529 defines the IP code your cabinet is tested against and IEC 61439-1 applies to low-voltage assemblies. Neither is a machine standard — but the flatness and angle consistency needed to pass an ingress test are established at the bending stage, not at final assembly.
Sur les machines, cela se traduit par un blindage arrière entièrement fermé, des capots de protection sur toutes les pièces mobiles saillantes, des barrières laser qui arrêtent le mouvement en cas d'intrusion dans la zone protégée, une protection contre la surcharge sur les poinçonneuses à tourelle, ainsi qu'un système de détection de charge décalée à grille et règle sur les plieuses de tôles.
Enclosure ranges usually need the first two. The third supplies parts you will keep buying in.
| Cintreuse de panneaux CNC | Presse plieuse CNC | Profilage | |
|---|---|---|---|
| Géométrie de la pièce | Panneaux plats repliés sur les quatre côtés | Any bend line, any thickness in capacity | Constant cross-section profiles |
| Typical enclosure parts | Cabinet bodies, doors, partitions, trays | Structural bases, lugs, heavy brackets | Frame members, mounting rails |
| Thickness for this sector | ≤2.0 mm cold-rolled | 2.0 mm and above | Set by the roll set |
| Sealing-face straightness | environ 0,2 mm/m | Dépend du couronnement et de l'opérateur | Excellent, but fixed section |
| Response to a design revision | Program change, minutes | Changement d'outil et remise à zéro de la jauge | New roll set, weeks |
| Opérateurs | 1, ou 0 avec chargement automatique | 1–2 | 1 per line |
| Est-ce que STON le fournit ? | Oui | Oui | No — different process |
Battery module trays are worth checking early. A folded tray suits a panel bender; a drawn shell does not, and no amount of tooling will change that. We separate the two at drawing review.
Les figures ci-dessous illustrent l'orientation et le mécanisme de cette modification. Les résultats réels dépendent de la composition de vos pièces, de la taille des lots et de l'organisation des équipes ; nous les simulons en fonction de vos propres plans avant de vous soumettre un devis.
| Article | Plieuses uniquement | Turret punch plus panel bender cell |
|---|---|---|
| Operators on a 2 mm cabinet panel | 2, lifting and turning | 1, ou en mode automatique avec chargement |
| Door sealing-face straightness | Dépend du couronnement et de l'opérateur | environ 0,2 mm/m |
| IP test failures at corners | Common when angle drifts between panels | Reduced by closed-loop angle control |
| Response to a design revision | Re-tooling and re-proving | Program change, same day |
| Cut-outs per panel | Laser plus manual secondary operations | One clamping on the turret punch |
| Changeover between models | Tool swap and gauge reset | Program recall plus compensation adjustment |
| Parts above 2.0 mm | Handled | Stay on the press brake |
Logique de retour sur investissement que nous appliquons avec nos clients : (gain annuel en main-d'œuvre + réduction des retouches et des rebuts + production commercialisable supplémentaire) ÷ coût de l'équipement installé. Nous calculons ce chiffre à partir de vos données réelles, plutôt que de publier un chiffre global qui ne correspondrait pas à votre usine.

Cast-iron frame models rated to 2.0 mm cold-rolled at full bend length. Full-electric servo closed-loop control, rapid compensation adjustment, grating-ruler offset-load detection, custom knives for gasket channel profiles.
Voir le type de bras de presse →
Cable entries, ventilation patterns, fan cut-outs, busbar clearances and mounting arrays in one clamping, without dedicated dies. ±0.1 mm accuracy, turret speed to 40 rpm, over-tonnage protection.
Voir la série SF →
Repeating hole patterns and one-off contours on the same panel in a single clamping. Roughly 40% less floor space than separate machines, and no secondary alignment between the array and the cut-out.
Voir la série SFL →
For structural bases, lifting lugs and reinforcement plates above the panel bender window. 63 t to 320 t, DELEM or ESA control, mechanical compensation, laser protection device.
View PBS series →
Exchange-table fiber laser for prototypes, first articles and revised drawings that arrive faster than tooling can be ordered. Burr-free edges on coated and galvanised sheet.
Voir l'unité laser →
Native interface on every panel bender, compatible with most robotic arm and gantry brands. On 2 mm panels the weight alone justifies removing the manual lift.
View truss system →Founded in 2006 and headquartered in Qingdao, one hour from major export ports and the airport. Casting, heat treatment, machining, welding, assembly and inspection all happen inside our own 20,000㎡ factory. That is why a configuration change for a battery enclosure line does not become a six-month subcontracting problem.




Energy storage projects run to grid connection dates and charger rollouts run to site handover. A stopped cell delays an installation schedule, not just a production plan.
Les caractéristiques techniques figurant sur cette page ont été vérifiées par rapport à la documentation technique de STON le 4 août 2026. Les limites de formage sont confirmées par rapport à vos propres plans avant l'établissement du devis. Publié le 4 août 2026 · Dernière mise à jour le 4 août 2026 · Révisé par Vicky Xu, responsable des ventes à l'international.
Two things decide the machine: your heaviest gauge and your largest panel. Send those and we come back within 24 hours with a configuration and a clear split between bender and press brake work.
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