How to Choose the Best Coin Cell Crimper for Lab R&D/Production?

The packaging of lithium batteries (coin cells) is a crucial process in battery manufacturing. The core function of the Coin Cell Crimper is to tightly press and seal the battery shell, sealing ring, and electrode components with precise pressure control, achieving four core values:

(1) Sealing protection: Blocking external environmental interference

By using a mold to perform circular pressing on the edge of the battery shell, the PP/PTFE sealing ring will elastically deform and fill the gaps, forming a sealed space. A university laboratory used the AOT-MSK-110 hydraulic model to encapsulate CR2032 batteries in an argon glove box with an oxygen content of <0.1ppm and operated continuously for 48 hours. The electrolyte leakage rate was only 0.2%, significantly higher than the 8% leakage rate of manual equipment. This sealing performance directly avoids electrode oxidation and electrolyte decomposition, ensuring that the test data for battery cycle life deviation is controlled within ±3%.

(2) Structural shaping: Ensuring battery accuracy and consistency

By adjusting the pressure from 0 to 8 tons, the electrode components are fixed to ensure a thickness tolerance of ±0.02-0.15mm. In an intermediate test line of an energy storage enterprise, the AOT electric coin cell crimping machine processed 100 sets of CR2450 batteries, and the outer diameter error was all <0.1mm, with the internal resistance fluctuation range being only 2-5mΩ, ensuring batch performance consistency.

(3)Adaptation to multiple production scenarios

Research and development scenario: The manual digital display model supports battery encapsulation with diameters ranging from 5 to 25mm. A vocational school laboratory used it to prepare LR44 button battery samples. The time for changing molds was less than 5 minutes, meeting the requirement for rapid preparation of multiple specifications of samples in teaching demonstrations;

Pilot production scenario: The electric model achieves seamless switching of CR2016/2032/2450 models through modular design. It can complete 150 battery encapsulations within 2 hours, reducing 40% of downtime compared to traditional equipment;

Special environment: The AOT-MSK-110-S pneumatic model adopts an external power supply design. It can operate continuously for 72 hours in the low-oxygen environment of aerospace battery research, with the pressure stable at 850-1000psi, and without any arc safety hazards.

1、Scenario-based Application: Verifying the Value of Equipment with Data

(1) University Teaching Laboratories: A Cost-Effective Choice for Manual Models

A vocational school's new energy major uses the AOT manual battery sealing machine for teaching experiments. Students can complete the CR2032 battery packaging in a single operation. The equipment achieves a pressure output of 80-1400Kg through a mechanical lever structure. Although each packaging takes 15 seconds, the pressure accuracy is ±1.5%, and the leakage rate of 10 groups of samples prepared by the students is all less than 5%, fully meeting the requirements for teaching demonstrations.

(2) Pilot Testing of Industrial Energy Storage: The High Pressure Advantage of Hydraulic Models

When an energy storage company tested the performance of lithium-sulfur batteries, they chose the AOT hydraulic model. With a maximum pressure of 5 tons, it can be adapted to battery enclosures with thick shells. During a continuous 72-hour operation, the equipment processed 200 CR3032 batteries, and the enclosures did not deform after being sealed. After 200 charge-discharge cycles, the leakage failure rate was only 1.5%, which was much lower than the 6% of the electric model.

2、Multi-dimensional Comparison: Selecting the Right Equipment Based on 4 Core Dimensions

(1) Comprehensive Dimensional Comparison of Equipment Types

(2) Identification of superior and inferior equipment:

Mold accuracy: The molds of high-quality models undergo hardening treatment, with the surface roughness Ra being less than 0.8 μm. The Ra value of inferior molds is usually greater than 3.2 μm, resulting in a roundness error of more than 0.3 mm after battery packaging;

Pressure stability: For the AOT electric model, the pressure fluctuation during 100 consecutive operations is less than ±0.05 tons. For inferior equipment, the fluctuation can reach ±0.2 tons, resulting in 30% of the battery seals failing.

Structural reliability: The hydraulic model adopts an integrated cylinder without any sealing connection points, with an oil leakage rate of less than 5% within 3 years; inferior equipment is usually of a pieced-together structure, with an oil leakage rate exceeding 40% within half a year.

Safety configuration: High-quality models are equipped with overpressure alarm and emergency stop buttons by default. Poor-quality models lack safety protection and are prone to shell rupture accidents that could cause injuries.