Cell & Pack Manufacturing

Manufacturing Process Map - 2. Cell Assembly - Prismatic ZSTACKING CHALLENGES

anode, cathode, separator alignment

Winding the cathode, anode, and two separator rolls. Welding the aluminum and copper tabs onto the cathode and anode respectively. SPEED 30 parts/min

HOT PRESS CHALLENGES throughput

The hot press machine works on the principle of heat and pressure application to achieve a strong and reliable bond between battery components. SPEED DWELL TIME 10 seconds/unit

of total manufacturing cost

scrap rate

CHALLENGES

cap to can alignment, missed laser welding spot

CAP TO CAN WELDING

The can to cap spot welding by laser source and followed by complete laser welding of the cap to can.

WOUND PRISMATIC

Roll the slitted cathode, anode, and separator together by controlling speed, tension, etc. SPEED 30 parts/min

PRE WELDING & TRIMMING

The cathode and anode tab are aligned and U/S welded SPEED 1820 parts/min

ELECTROLYTE INJECTION

Electrolyte is injected into the vacuumed can. The can is pressurized to accelerate electrolyte absorption and then sealed

PRE CHARGE & FORMATION

After the filling pre charge is performed and cell is kept for RT aging and followed by formation & grading process

CHALLENGES

uneven stress, burr issues, and powder loss

CHALLENGES

anode, and cathode tab alignment

CHALLENGES

electrolyte absorption due to density; pooling of electrolyte

CHALLENGES

throughput and quality

Graphics courtesy of LG Energy Solution. Reproduced with permission. Sources: CATL, RWTH PEM

Extracted from the PDF; charts and images may read imperfectly.