1、 What is a battery grooving machine?

The battery grooving machine is a core precision equipment in the production of lithium-ion batteries and nickel-metal hydride/nickel-cadmium batteries. It is a dedicated device that processes uniform grooves at designated positions on cylindrical battery steel or aluminum shells through mechanical rolling or laser cutting technology. Its core components include a PLC control system, high-precision rolling cutter module, flexible clamping mechanism, and vacuum dust removal device. It can be adapted to all series of cylindrical cells such as 18650, 21700, 26650, and 32650, achieving ultra-high precision processing with a groove depth tolerance of ±0.02mm and concentricity tolerance of ±0.01mm. Please provide the text you would like translated.

Based on the degree of automation, the equipment is divided into two major types: semi-automatic and fully automatic. Semi-automatic models require manual assistance for loading and unloading materials and are suitable for research and development and small-batch production. Fully automatic models integrate an automatic process of feeding, positioning, slotting, and discharging, which can be seamlessly connected to lithium battery PACK production lines and meet the needs of large-scale mass production. Please provide the text you would like translated.

2. The core function of the battery grooving machine

Ensuring sealing reliability: The slot provides an accurate installation reference for the battery sealing ring, preventing electrolyte leakage. In the production of new energy vehicle power batteries, the slotting accuracy directly affects the sealing performance of the module. A certain car manufacturer's actual test shows that after using a high-precision grooving machine, the battery pack leakage failure rate dropped from 0.3% to 0.01%. Please provide the text you would like translated.

Enhance structural stability: Fix the internal winding core of the battery cell through slot design to prevent electrode sheet displacement caused by vibration. In the energy storage battery pack scenario, the structural stability of the battery cells with slotted treatment has been improved by 40% in the -20℃ to 60℃ environmental cycle test. Please provide the text you would like translated.

Adaptation to automated production: The fully automatic model achieves a processing efficiency of 40ppm (2,400 pieces per hour), which is 30 times that of manual operation. It supports the storage of over 100 sets of parameters and can be quickly reconfigured within 3 minutes, meeting the flexible production demands of multiple types of battery cells. Please provide the text you would like translated.

Optimizing electrochemical performance: Precisely controlling the slot size can reduce stress concentration on the electrode sheet and increase the battery's energy density. For instance, after optimizing the slitting of 21700 power batteries, the energy density of a single cell can be increased by 5% to 8%. Please provide the text you would like translated.

3. Application Scenarios

Production of new energy vehicle power batteries: In Tesla's 4680 cell production line, the fully automatic grooving machine operates continuously for 72 hours, with the groove depth error maintained within ±0.03mm. It is suitable for ultra-thin designs with a steel shell thickness of 0.25mm, avoiding shell deformation caused by grooving, and maintaining a yield rate of over 99.8%. Please provide the text you would like translated.

Consumer electronics battery processing: When processing 18650 battery cells for mobile phones and laptops, the equipment uses a 10° angle roller knife design and a flexible clamping system to solve the problem of burrs when slotting ultra-thin aluminum shells (0.2mm thick), achieving a slot surface roughness of Ra0.4μm, eliminating the need for a secondary grinding process. Please provide the text you would like translated.

Customized production of energy storage batteries: For 32650 energy storage cells, the equipment can quickly adjust the slot width (1.1 - 1.5mm) and slot depth (1.2 - 2.0mm) through the HMI touch screen. It supports small-batch customized orders, with the response cycle shortened to 3 - 7 days, meeting the diverse demands of the household energy storage market.

4. Frequently Asked Questions

(1) What causes excessive vibration during the operation of the equipment? Please provide the text you would like translated.

Common causes: Deformation of the diamond roller cutter, wear of the clamp plate or damage to the output shaft bearing. The solution is to replace the roller cutter of the same specification, the worn parts, and recalibrate the concentricity of the bearing. Please provide the text you would like translated.

(2) How often is the equipment maintained? Please provide the text you would like translated.

Core maintenance: The hob should be calibrated once every 1 million pieces processed, and the bearings should be lubricated and maintained every 3 months. The consumable parts (carbon brushes, sealing rings) are recommended to be replaced every 6 months. The average annual maintenance cost is less than 2% of the total equipment price. Please provide the text you would like translated.

(3) What are the advantages compared with laser slotting machines? Please provide the text you would like translated.

The mechanical slotting machine has a cost that is 50% lower, and the slot has no heat-affected zone, avoiding the shell embrittlement caused by laser, making it more suitable for large-scale mass production; the laser model is more suitable for ultra-precision micro slotting scenarios (slot width < 1mm). Please provide the text you would like translated.

As the "precision gatekeeper" in lithium battery manufacturing, the performance of a battery slitting machine directly determines the safety, consistency and service life of the battery. When choosing one, it is necessary to consider the production capacity requirements (semi-automatic / fully automatic), precision requirements (±0.01~±0.03mm), and export compliance certifications. It is advisable to prioritize those with transparent parameters and strong scene adaptability.