Battery Manufacturing EquipmentKejing MSK-UW-D800W ultrasonic tab welder
The Kejing MSK-UW-D800W joins foils and tabs with two separately set ultrasonic stations, one for pre-welding and one for the final tab weld. The operator places the cell and slides a shared fixture between them. Material sensing, welding and dust collection are built in. It runs at 40 kHz with 50–800 W output.
By Shenzhen Kejing Star Technology Company · MSK-UW-D800W
Frequency, power, layer count and cell size
The table gives 40 kHz, 50–800 W adjustable output, weld time adjustable below 0.4 s and two standard 3×6 mm weld heads. For continuous running Kejing lists 1–15 copper or aluminium layers; up to 20 layers is listed for intermittent use only. Single-tab cells up to 380×210 mm fit, with a fixture made to the customer's design.
Elsewhere Kejing quotes a pull force of ≥70 N and more than 80% residual area after welding 16 copper layers. That example gives no foil thickness, tab material, test method or duty cycle, so treat it as one data point and set your own joint tests. Fixture and weld-point sizes can be customised.
| Parameter | Published value | Record status |
|---|---|---|
| Ultrasonic frequency | 40 kHz | known |
| Listed adjustable welding power | 50–800 W | known |
| Continuous copper/aluminium layer range | 1–15 layers | known |
Catalogue values apply to the configuration and test method the maker states. Ask for the values that apply to your configuration.
Source references: s1
Separate recipes for the pre-weld and the final weld
Send the foil material, thickness and count, the tab construction and a joint drawing. Define what the pre-weld and the final weld each have to do, along with clamping and alignment, horn and anvil condition and the allowed weld area. Kejing lists aluminium positive and nickel negative tab welds; write the exact combination you need into the offer.
Trial each joint and record amplitude, time and force where the controller shows them. Agree a pull, section or residue test for acceptance. Inspect the foils next to the weld and any insulation for tears or imprint damage. The short weld time is the period of ultrasonic energy only; loading and unloading set the operator's real cycle.
Shared fixtures across Kejing machines
Kejing says the same fixture can move on to its tab-cutting and shaping equipment, so the cell is clamped once for several operations. That only works if you buy matching fixtures and machines; a standalone welder comes without a cutter or transfer line, so list the fixtures and station handovers you expect.
Watch material detection, safe start and the chosen dust collection and cleaning, following the supplier's procedures. It needs about 1.4 kW at AC220 V and an air line at 0.5–0.8 MPa. At handover, expect training on horn and anvil wear, fixture changeover, extraction and safe access. Kejing gives no measured weld yield, dust level or effect on cell electrical results.
Tab resistance after welding can be checked as the cell measurement page explains.
The stacks being joined usually come from a stacker such as the Kejing Z-fold stacker.
Source references: s1
Questions that change the purchase
| Decision | What the catalogue says | Next step |
|---|---|---|
| Is the layer count continuous or occasional? | The table lists 1–15 layers continuous and 20 layers intermittent. | Approve the duty and foil stack, then watch the intended run. |
| Does the pull example match your joint? | The 16-layer copper example gives no foil thickness or test method. | Agree joint-specific tests and record each recipe. |
| Will the fixture fit the next cutter? | Kejing describes a shared fixture across its own machines. | List the delivered fixtures and station handovers. |
Prepare the supplier conversation
Fill in the conditions below and ask the supplier to answer each open point in writing. Copying or downloading stays in your browser; nothing is sent.
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 MSK-UW-D800W ultrasonic tab welder original specification
Shenzhen Kejing · Manufacturer-origin source
Kejing's specification for the D800W, with frequency, power, weld time, layer counts, cell size, pull example and services.
Archived source check: 2026-10-11
s2 · Official current equipment catalogue
Shenzhen Kejing · Manufacturer-origin source
Kejing's current catalogue listing its tab welding, cutting and shaping machines.
Archived source check: 2026-10-11
Still to confirm
- Pull and section results for your foil stack and tab.
- Whether your layer count runs continuously or only intermittently.
- Amplitude and force settings shown on the controller.
- Accepted welds per hour, loading and unloading included.
- Which fixtures match your cutter or shaping machine.
Pre-welding and final tab welding on stacked cells
- Foil and tab materials, thicknesses, layer count and duty
- Pre-weld and final joint drawing, weld heads and fixtures
- Recipe settings and agreed pull or section test
- Adjacent foil damage, residue and dust checks
- Operator cycle, shared-fixture interfaces, safe start
- Horn and anvil wear, air, extraction and maintenance