Battery Manufacturing EquipmentKejing rotary pouch vacuum final-sealing machine
The Kejing MSK-115A-PM makes the final seal on pouch cells after formation. Two rotary stations share one puncture and seal head: the operator loads and unloads, and the machine pulls vacuum, punctures the gas bag, drains it and heat-seals. Cells up to 200×135×15 mm fit, gas bag excluded. Kejing quotes 180–220 pieces/h.
By Shenzhen Kejing Star Technology Company · MSK-115A-PM
Cell limits, head and sealing figures
The largest cell is 200×135×15 mm without the gas bag, and the gas-bag side must stay below 65 mm, per the supplier's dimension drawing. A 210 mm head seals up to 200 mm. The standard seam is 6 mm wide, with 2–10 mm available or custom tools.
Kejing quotes seal thickness uniformity better than 0.03 mm, a maximum of 150 kgf at 0.6 MPa air, and head temperature up to 250°C with ±2.5°C control. Leak tightness and the pressure on the seal are separate results that your trial must measure. The customer supplies the vacuum pump; Kejing lists up to −95 kPa at standard atmosphere, so agree the reference for a loaded chamber.
| Parameter | Published value | Record status |
|---|---|---|
| Effective sealing length | ≤200 mm | known |
| Standard seam width | 6 mm | known |
| Operator-dependent reference output | 180–220 pieces/h | known |
Catalogue values apply to the configuration and test method the maker states. Ask for the values that apply to your configuration.
Test drainage and the final seal together
Send the pouch laminate, gas-bag geometry, cell condition and the process stage the cells arrive from. Agree puncture position, fixture support, how drained liquid is collected and where the final seal sits. The machine collects electrolyte, but ask how much liquid stays in the cell, what local disposal rules require, and which seal recipe suits your laminate.
Trial representative pouches under the maker's approved conditions. Record temperature, dwell, load and vacuum, and inspect the agreed joints, including tab and seam areas on the drawing. Kejing lists dwell at 0–99 s and recommends 3–4 s; confirm the right value on your material. Set your own limits for seal quality and liquid loss.
Real output depends on the operator
Kejing's reference output is 180–220 pieces/h and depends on operator skill. Count finished pouches that pass your checks across loading, puncture and drainage, sealing and unloading. The two stations take turns at a single head, and loading is manual.
The machine is about 720×860×1700 mm and 300 kg, and needs AC220 V at 1 kW plus compressed air of 0.5–0.8 MPa. The handover covers needle and head wear, chamber and vacuum checks, emptying the liquid collector and safe access to the hot head. Kejing names an entry light curtain and door interlocks; ask the supplier for conformity documents for your site. Kejing gives no figures for finished-cell yield or leakage.
The gas drained here forms during the first charge, a step the formation page explains; filling and pre-sealing happen earlier on a machine such as the Kejing PVM filler. The acceptance testing page covers seal checks.
Questions that change the purchase
| Decision | What the catalogue says | Next step |
|---|---|---|
| Does the gas bag fit the puncture fixture? | The catalogue's cell limit leaves out the gas bag and sets the bag side below 65 mm. | Approve the full pouch and fixture drawing. |
| How will seal quality be judged? | The catalogue gives seal thickness uniformity better than 0.03 mm and no leak figure. | Agree seal and drainage checks on trial pouches. |
| Are two stations two sealing heads? | The catalogue shows one puncture and seal head serving both rotary stations. | Watch and time the full operator cycle. |
Prepare the supplier conversation
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Sources and check dates
The maker's own pages and public records used for this page, each with the date it was checked.
s1 · Kejing rotary pouch vacuum final-sealing machine original specification
Shenzhen Kejing · Manufacturer-origin source
Kejing's specification for the MSK-115A-PM, with cell and gas-bag limits, head, temperature, force, vacuum, output and services.
Archived source check: 2026-10-11
s2 · Official current equipment catalogue
Shenzhen Kejing · Manufacturer-origin source
Kejing's current catalogue listing its pouch filling, pre-sealing and final sealing machines.
Archived source check: 2026-10-11
Still to confirm
- Leak results on your laminate with the final seal recipe.
- Liquid left in the cell after drainage.
- Accepted pouches per hour with your operators.
- Conformity documents for the light curtain and door interlocks.
Final degassing and sealing of pouch cells
- Cell and gas-bag sizes, laminate and final seal drawing
- Incoming cell condition and process stage
- Puncture and drainage fixture, collection, liquid left in cell
- Head, dwell, load and vacuum recipe, seal checks
- Accepted full-cycle rate, cell identity and stop recovery
- Needle and head wear, collector servicing and guarding