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Prismatic Battery Secondary Electrolyte Filling Machine
Our prismatic battery secondary electrolyte filling machine is designed for automatic vacuum variable‑volume secondary injection into square aluminum‑case power batteries. This square aluminum cell refilling equipment automates conveyor feeding, barcode scanning (linked to first filling data), automatic forming pin removal, pre‑weighing, vacuum variable filling, high/low pressure soaking, post‑weighing, DMC cleaning, CCD‑guided helium backfill & sealing pin insertion, and inspection. As a lithium battery second injection system for capacity recovery, it achieves ≥20PPM, 99.5% yield, ±0.5% filling accuracy, and ±0.01g weighing precision – with a heavy‑duty rotary table, automatic cell clamping, and transparent filling cups.
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What Is a Prismatic Battery Secondary Electrolyte Filling Machine?
A prismatic battery secondary electrolyte filling machine is used for the second electrolyte injection process after initial formation, often to compensate for electrolyte loss, improve wetting, or recover cell capacity. Our system is specifically built for square aluminum‑case power batteries used in electric vehicles and energy storage systems. It supports variable filling volumes (0–300g) and links secondary injection data with the first filling for full traceability.
Square Aluminum Cell Refilling Equipment – Key Technical Features
This square aluminum cell refilling equipment incorporates advanced engineering for reliability, precision, and cleanliness:
Vacuum variable filling with high/low pressure breathing soaking – Accelerates electrolyte absorption, total soaking time ≤180 seconds.
Heavy‑duty rotary table – Servo‑controlled rotation speed, supported by large‑diameter rotary bearings instead of cam indexers, preventing table deformation and ensuring chamber pressure integrity.
Automatic cell clamping – Prevents cell deformation during filling and soaking.
Wireless remote secondary screen – Easy maintenance and operation.
Transparent glass filling cups – Allows operators to visually monitor liquid levels in each cup.
Pre‑fill cleaning system – Cleans filling cups and nozzles before each cycle, improving accuracy and preventing secondary contamination.
Residual liquid collection – Nozzle drip collection after filling avoids electrolyte contamination on cell surfaces.
Tapered insert nozzle – Eliminates liquid residue at the filling port step/right‑angle junction.
Lithium Battery Second Injection System for Capacity Recovery – Technical Parameters
As a high‑performance lithium battery second injection system for capacity recovery, our machine meets the following specifications:
| Parameter | Value |
|---|---|
| Dimensions (L×W×H) | 7200×3200×2800 mm |
| Weight | ≈8 T |
| Power | 15 kW |
| Power supply | AC380V/50Hz |
| Air source | ≥0.7MPa, 30L/s (50% utilization) |
| Vacuum source | ≤-95kPa, 60L/s |
| Nitrogen | ≥0.6MPa, 60L/s |
| Cell size range | Length 100–200mm × Width 100–175mm × Thickness 15–30mm |
| Production capacity | ≥20 PPM (total soaking time ≤180 seconds) |
| Yield | ≥99.5% |
| OEE (availability) | 98% |
| Filling volume range | 0–300 g |
| Filling pump accuracy | ±0.2% |
| Filling accuracy | ±0.5% |
| Weighing accuracy | ±0.01g |
Custom configurations available upon request.
Complete Process Flow – From Feeding to Outfeed
The fully automatic process sequence includes:
Conveyor feeding – Cells enter the system.
Barcode scanning & data linking – Secondary injection data linked to first filling data.
Automatic forming pin removal – Pins from formation are removed.
Pre‑weighing – Dry weight recorded.
Reject collection – Bad cells removed.
Automatic loading into filling fixture – Cells positioned on rotary table.
Leak test before filling – Ensures cell integrity.
Automatic vacuum variable filling – Electrolyte injected with adjustable volume (0–300g).
High/low pressure cyclic soaking – Accelerates electrolyte absorption (total soaking ≤180s).
Residual liquid collection from filling cup – Prevents drips.
Filling cup & nozzle cleaning – Prepares for next cycle.
Unloading from fixture – Cells released.
Post‑weighing – Verifies electrolyte amount.
Automatic DMC cleaning of filling port – Removes residue.
CCD‑guided helium backfill & sealing pin insertion – Precision placement of sealing pin.
Sealing pin inspection – Confirms correct insertion.
Conveyor outfeed – Transfers cells to next process.
Why Choose This System for EV Prismatic Battery Production?
High throughput – ≥20PPM with ≤180s soaking time, 99.5% yield, 98% OEE.
Superior reliability – Heavy‑duty rotary bearing table eliminates deformation, maintains chamber seal.
Precision filling – ±0.5% filling accuracy, ±0.2% pump accuracy, ±0.01g weighing.
Clean & safe – Pre‑fill cleaning, residual liquid collection, taper nozzles prevent contamination.
Data traceability – Barcode linking with first filling data for full process control.
Capacity recovery – Variable injection compensates electrolyte loss, extends cell life.
Applications
Electric vehicle (EV) prismatic cells – Second injection after formation.
Energy storage systems (ESS) – Large‑format square aluminum batteries.
High‑power battery manufacturing – Capacity recovery and performance enhancement.
⚡ High speed & yield – 20PPM, 99.5% yield, ≤180s total soaking time.
🔧 Variable vacuum filling – 0–300g adjustable, ±0.5% accuracy, capacity recovery.
🧼 Clean & traceable – Nozzle cleaning, residue collection, data linking with first filling.