DLN Energy - logo

Battery Quality - quality at the core

A comprehensive quality system for a lithium-ion battery factory involves various elements to ensure the production of high-quality and reliable batteries.

Battery Quality

In DLN Energy, the responsibility for product quality issues lies jointly with the technical department and the quality inspection department.

The process is as follows:

  • The marketing department determines the product type.
  • The technical department handles the design, development, and evaluation, ultimately setting the quality standards.
  • The quality inspection department rigorously manages the entire process to ensure that the produced batteries meet or exceed the quality standards set by the technical department. They collect feedback on quality information and data, and address any after-sales issues.

The specific composition of our quality system is as follows:

Quality System


Quality Objectives

Established within the framework of both national and international standards in China, incorporating the demands of the marketing department. These quality objectives are designed to guide, measure, and continually improve the entire production process.


Quality Planning

Encompasses comprehensive quality planning for all stages of battery production. It involves technical assessments, risk evaluations, and management strategies to identify and mitigate potential issues.


Implementation Processes

Stringent control measures are implemented to ensure the consistency and reliability of the production process.

Laboratory equipment for battery


Supplier Management

Includes supplier qualification and evaluation procedures to ensure the quality of raw materials and components. Collaboration with suppliers is maintained to uphold consistent quality standards and anticipate future product designs and the introduction of new materials. This prepares us for upcoming developments in new products and materials.


Design & Development

A rigorous design and development process is in place to ensure that the batteries meet performance specifications and safety standards.


Testing & Inspection

Comprehensive testing protocols cover both raw materials and finished products. Regular inspections are conducted to verify compliance with quality standards.

Test reports for battery


Document Control

An effective document control system manages and updates quality-related documents, including specifications, procedures, and work instructions.


Training & Competence

A continuous training program is implemented to ensure that employees have the necessary skills and understanding of quality requirements. Employees are provided with timely competence assessments and skill development plans.


Customer Feedback & Complaints

A system is in place to capture and analyze customer feedback and complaints.

Case 1: Excessive internal resistance in battery cells.

Excessive internal resistance in battery cells

Case 2: Leakage in battery cells.

Leakage in battery cells


Continuous Improvement

Implementing continuous improvement methods. Regular reviews and audits are conducted to identify areas for improvement.



-A robust traceability system that tracks the status of raw materials, components, and finished products throughout the production process.

Enables quick identification and resolution of quality issues.


Adherence to relevant national and international standards and regulations

Compliance with safety and environmental requirements.

-Implementing and maintaining such a comprehensive quality system ensures the production of reliable products in the lithium battery factory. This system aims to meet customer expectations and continuously strive to enhance quality and efficiency.

some of our special testing

Vibration Test for Lithium ion Battery

  • The battery is tested with a simple tuned vibration of 0.8mm amplitude.
  • The vibration frequency changes at a rate of 1Hz/min within the range of 10-55Hz, and recovers within 90-100min.
  • The battery vibrates along three mutually perpendicular directions. For cells with only two axes, the cell shall be tested perpendicular to each axis.
  • At the end of the test, the sample will not catch fire, explode or leak.

Evaluation of the performance and stability of lithium batteries under vibrational conditions is essential to determine whether they can operate safely and reliably during transportation or usage.

The details are as follows:

1) Reliability Assessment

By simulating the vibrational conditions that batteries may encounter during actual transportation or usage, it is possible to verify if the battery’s structure and connections are sufficiently secure, thus preventing malfunctions caused by vibrations.

2) Performance Stability

For applications requiring prolonged operation or functioning in vibrational environments, this testing ensures that the battery can maintain stable electrical performance under vibrational conditions.

3) Safety Evaluation

Vibrations may lead to the displacement or damage of internal components within the battery, increasing the risk of battery failure. Testing helps identify potential safety hazards, ensuring that the battery does not pose a danger in vibrational environments.

4) Transportation Compliance

In some countries and regions, the transportation of lithium batteries is subject to specific regulations. Vibrational testing ensures that lithium batteries comply with transportation standards, reducing the likelihood of accidents during transport.

5) Product Optimization

Through vibrational testing, feedback on the design of lithium batteries can be obtained. This aids in continuous improvement of the product’s structure and manufacturing processes, enhancing durability and adaptability.

Quality Certification

Lithium ion Battery Certification

The quality certificate is a crucial component of our quality system.

DLN Energy Certification-5
Certification for Safe Transport of Goods - Dangerous Goods
DLN Energy Certification-6
Lithium Cell or Battery UN38.3 Certification
DLN Energy Certification-7
1.2m Drop Test Report

Noted: To get more lithium battery certifications, please refer to Lithium Ion Battery Certification.

Contact Us