Battery Pack Testing Guidance of Lithium Ion Battery Manufacturer

Making lithium-ion batteries is one professional thing. Providing a reliable and long-lasting battery pack is a morally driven action for the lithium-ion battery pack manufacturer. Li-ion batteries are requested with strict standards such as the certificates, UN38.3, IEC62133, UL, and CE and it requests the battery packs should be deeply tested by the testing battery equipment, and battery pack testing standards. This article would guide you through the process of battery pack testing and the list of battery testing and manufacturing equipment in the lithium ion battery pack manufacturer.

How Much Battery Testing Do Lithium Ion Battery Manufacturers Do During The Production Process?

Raw Material Testing-Cell, BMS, and Charger

The raw material testing is included the cells, BMS, and charger. The cells should be inspected the internal resistance by the battery internal resistance tester. Each BMS should be tested with all the battery management system data by a protection board tester. Each charger should be tested by a power meter to check the charger specification.

According to lithium-ion battery testing standards, raw material testing is very important for pre-production.

Sorting Process-Automatic Sorting Machine

This sorting machine is the first process of battery pack manufacturing. This machine fulfills the cells with voltage, capacity, and internal resistance gap in the channel which cells can be combined in one battery pack. Then the machine makes this cell’s insulation.

Sport Welding Process-Spot Welding Machine

Spot welding machines have four types, such as automatic spot welding machines, semi-automatic spot welding machines,full-automatic spot welding machines, and pneumatic spot welding machines. The process of spot welding machines is a serious process. The worker should maintain the machine every week and change the spot welding needle according to the nickel strip spec. To ensure the spot welding quality, the tool assists the battery pack assembly.

Sport Welding Process-Spot Welding Machine

Charging and Discharging Aging Tester

These charging and discharging aging testers affect the production capacity and lead time. These testers the battery pack voltage, capacity, max continuous discharge, and max continuous charge whether your custom battery pack needs. Besides, the tester does the battery cycles and inspects the spot welding and BMS assembly. It is the core process of the battery pack assembly, especially for the high-power battery pack.

Charging and Discharging aging tester

Battery Comprehensive Tester

Before the battery pack shipment, all battery packs should be tested by the battery comprehensive tester. The test ranges are internal resistance, discharge protection, circuit short protection, cut-off delay protection, etc.

Constant temperature and humidity Tester

With the change in temperature and humidity, the chemistry of li-ion batteries reacts differently. The temperature and humidity affect the battery life cycles and battery performance. The constant temperature and humidity tester simulate different temperature and humidity, the battery performance data can be recorded. It helps us to analyze and modify the battery pack solution. You can get a more reliable and long-lasting battery pack solution.

Vibration Tester

The vibration tester simulates the working environment of Li-ion batteries and inspects spot welding, connector interface points, and wire processes. This testing ensures the structural integrity and durability of the battery packs.

Electronic Load Tester

The electronic load tester simulates the real-time working environment of the battery pack. It tests the electronic performance of the li ion battery pack, such as overvoltage protection, overcurrent protection, over power protection, voltage reversal, and over temperature protection. The different brands of electronic load testers have different accuracy. We should choose the true protection function electronic load tester.

DC Power Supply

When the battery packs have a voltage gap, the DC power supply charges the cells of the lower voltage till the voltage reaches the higher voltage of the cells.

Battery Load Meter

The battery load meters test the output data of the battery pack. Especially, it can test the ultimate output performance to ensure safety and reliability.


When the battery packs do not work, the multimeter measures the voltage of the cells. You can get the result of whether the issues are from the cells or BMS.


Designing and manufacturing lithium ion batteries require specialized expertise and an unwavering commitment to quality. Every battery pack manufacturing step, including thorough testing with advanced equipment, is important to guarantee consistent quality and dependability.

At CMB, our lithium ion battery pack testing is integrated into our production, and our engineering team conducts extensive testing in our laboratory. To provide a long-lasting and reliable battery with morally driven actions, all of us are pursuing to improve our quality management system, engineering ability, manufacturing control, and li ion battery testing equipment.

When seeking a reliable lithium ion battery manufacturer, choosing a partner like us will ensure your battery needs are met with uncompromising quality.


Leave a Reply