Battery Manufacturing EquipmentKejing A8 eight-position coin-cell assembly machine
The Kejing MSK-E110-A8 assembles coin cells, doses electrolyte and crimps them after the operator preloads the material trays. Standard tooling is for CR2032, with custom sets for other sizes. One loaded batch holds up to eight cells. It suits labs that want a repeatable small-batch coin-cell routine.
By Shenzhen Kejing Star Technology Company · MSK-E110-A8
Eight cells per load, about 0.5 cells per minute
Kejing describes reverse assembly: the operator prepares the trays, then the machine picks and transfers parts for up to eight cells per loaded batch. Two material boxes come as standard. Kejing quotes about 0.5 cells/min as a reference speed. Robot integration is optional; in the standalone machine, tray preparation stays a manual job.
For the CR20 family Kejing recommends a crimp-force setting of 500–700 kg, with a 950 kg maximum. These are machine force settings, so the pressure on the case depends on your tooling. The force sensor is rated at ±0.5% of full scale. Agree your case stack, the tooling, how force is checked and the seal acceptance test with Kejing.
| Parameter | Published value | Record status |
|---|---|---|
| Maximum loaded batch | 8 cells | known |
| Reference assembly speed | ≈0.5 cells/min | known |
| Water-test absolute dose error at and below 0.1 g | ≤±7 mg | known |
Catalogue values apply to the configuration and test method the maker states. Ask for the values that apply to your configuration.
Small doses carry the same ±7 mg error
One peristaltic pump is fitted. The lowest setting is 0.01 g and Kejing suggests around 75 mg for a coin cell. Its test used deionised water: at 0.1 g the error was ≤±7 mg, or ±7%. Below 0.1 g the error stays at ±7 mg in absolute terms, so the percentage error grows as the dose shrinks. At a 75 mg dose, plan on that absolute error.
Trial your own electrolyte, tubing and dose and weigh the results by an agreed method. Record repeatability, carryover, priming and the liquid left in the line, following the supplier's procedure. Ask Kejing for the smallest dose it will hold to a stated accuracy with your electrolyte, since the water figure is the only one published.
Choose OCV or three-electrolyte dosing
The catalogue offers either the OCV module or the three-channel dosing module, and the two cannot be fitted together. The OCV option uses voltage and resistance to flag shorts and open circuits and stores the readings. The base unit has neither function, and the OCV module is a quick screen, separate from a capacity test.
Decide your lab workflow first, then sign off the module and tray configuration. Watch alignment, separator placement, assembly order, dosing and crimping on representative parts. Sort usable cells by the agreed checks and log recipe and lot for each one. For glovebox or dry-room use, check the pass-through size, gas supply and maintenance access against your own enclosure.
Assembled coin cells are cycled on testers whose ranges the battery tester page explains, such as the NEWARE CT-4008Q, and the results feed your acceptance records.
Questions that change the purchase
| Decision | What the catalogue says | Next step |
|---|---|---|
| Which optional module is needed? | The catalogue offers OCV or three-electrolyte dosing, one at a time. | Choose one and sign that configuration. |
| Is the small-dose error acceptable? | Below 0.1 g the stated error stays at ±7 mg. | Trial your electrolyte at the target dose and weigh the results. |
| What work stays manual? | The operator preloads the trays. | Time the whole run from loading to accepted cells. |
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 A8 eight-position coin-cell assembly machine original specification
Shenzhen Kejing · Manufacturer-origin source
Kejing's specification for the A8, with batch size, speed, crimp force, sensor rating, pump dose data and module options.
Archived source check: 2026-10-11
s2 · Official current equipment catalogue
Shenzhen Kejing · Manufacturer-origin source
Kejing's current catalogue listing its coin-cell assembly, crimping and disassembly tools.
Archived source check: 2026-10-11
Still to confirm
- Dose accuracy with your electrolyte at your target dose.
- Accepted cells per hour, tray preparation included.
- Seal test results for your case stack and crimp setting.
- Fit with your glovebox or dry room, including pass-through size.
Small-batch CR2032 assembly, dosing and crimping
- Coin case and stack drawings, CR2032 or custom tooling
- Tray loading, eight-cell batch and usable output
- Chosen OCV or three-electrolyte module
- Your electrolyte, dose weighing and error limit
- Crimp force and tooling, alignment and seal checks
- Glovebox or dry-room fit, cleaning and recipe records