Custom OEM Battery Pack Manufacturer: A Complete Procurement Guide

With the rapid growth of electrification in industries such as electric vehicles, AGV/AMR robots, energy storage systems, power tools, medical devices, and smart equipment, more companies are looking for custom OEM battery pack manufacturers instead of purchasing standard batteries.

A reliable OEM battery supplier should provide more than battery cells. They should have the capabilities of battery solution design, BMS development, structural design, certification testing, mass production, and after-sales support.

For global buyers, choosing the wrong battery supplier may lead to delayed projects, failed certifications, quality issues, and supply chain risks.

This guide explains:

• What OEM battery pack manufacturing means
• How to select the right battery supplier
• Custom battery development process
• Key technical specifications to evaluate
• Battery cell, BMS, and structural design requirements
• International certification requirements
• How to evaluate an OEM battery factory

1. What Is an OEM Battery Pack Manufacturer?

An OEM (Original Equipment Manufacturer) battery pack manufacturer designs and produces customized battery solutions according to customer requirements.

Unlike standard battery suppliers, OEM battery manufacturing includes:

✅ Battery cell selection
✅ Battery pack design
✅ Battery Management System (BMS) development
✅ Protection circuit design
✅ Housing and mechanical design
✅ Connector customization
✅ Communication protocol development
✅ Safety testing
✅ Mass production

Exemples :

• AGV robots require 24V/48V/72V high-cycle battery systems
• E-bikes require UL2271 certified lithium batteries
• Energy storage systems require 51.2V LiFePO4 battery packs
• Medical devices require reliable and compact battery solutions

These applications usually require customized battery packs instead of off-the-shelf products.

2. Why Choose OEM Battery Pack Manufacturing?

2.1 Customized Design for Limited Space

Different devices have different internal structures.

OEM battery manufacturers can design battery packs according to:

• Length
• Width
• Height
• Installation method
• Connector position

For example, robot batteries may require:

• Slim design
• Quick replacement structure
• Résistance aux chocs
• IP65/IP67 waterproof protection

2.2 Matching Specific Performance Requirements

Standard batteries may not meet the requirements of professional equipment.

OEM solutions can customize:

Options de tension

Configurations courantes :

• 12V
• 24V
• 36V
• 48V
• 51.2V
• 72V

Capacity Options

Exemples :

• 10Ah
• 20Ah
• 50Ah
• 100Ah+

Discharge Performance

Designed according to application requirements:

• Standard discharge
• High-rate discharge
• High peak current output

2.3 Improving Product Competitiveness

For equipment manufacturers, customized battery solutions provide:

• Product differentiation
• More stable supply chain
• Better user experience
• Higher product value

3. Information Required Before Purchasing OEM Battery Packs

Before contacting an OEM battery supplier, prepare a detailed RFQ (Request for Quotation).

Basic Battery Specifications

Application Information

The supplier needs to understand:

Application Scenario

Exemples :

• Robots AGV
• AMR robots
• Vélos électriques
• Chariots élévateurs
• Voiturettes de golf
• Systèmes de stockage d'énergie

Working Environment

Consider:

• Indoor or outdoor operation
• High temperature conditions
• Low temperature conditions
• Humidity
• Vibration environment

Electrical Requirements

Important parameters include:

• Maximum continuous current
• Peak discharge current
• Courant de charge
• Discharge rate
• Protocole de communication

Advanced BMS systems may support:

• CAN
• RS485
• UART
• Modbus

4. How to Select the Right OEM Battery Supplier?

Price should not be the only factor when selecting a battery manufacturer. A comprehensive evaluation is required.

4.1 Evaluate Factory Manufacturing Capability

A professional OEM battery factory should have:

Battery Cell Testing Capability

Y compris :

• Test de tension
• Test de résistance interne
• Essais de capacité
• Cell matching and sorting

High-quality battery packs require:

• Consistent voltage
• Consistent internal resistance
• Balanced capacity

Battery Pack Production Capability

Check whether the factory has:

• Lignes d'assemblage automatisées
• Laser welding equipment
• Spot welding equipment
• Aging test rooms
• High and low-temperature testing equipment
• Équipement d'essai d'étanchéité

Quality Management System

Recommended certifications:

• ISO9001
• ISO14001
• IATF16949 (automotive applications)
• Complete quality inspection procedures

4.2 Check R&D Capability

A true OEM battery manufacturer should have professional engineering teams.

Electrical Engineering Team

Responsible for:

• Circuit design
• Développement du BMS
• Parameter adjustment

Mechanical Engineering Team

Responsible for:

• CAD design
• Battery housing design
• Waterproof structure design

Testing Team

Responsible for:

• Performance verification
• Tests de sécurité
• Reliability testing

5. OEM Battery Development Process

A complete development process usually includes:

Step 1: Requirement Confirmation

Customer provides:

• Application details
• Caractéristiques de la batterie
• Size limitations
• Certification requirements

Step 2: Battery Solution Design

Engineers determine:

• Battery cell model
• Series and parallel configuration
• BMS solution
• Housing structure

Exemple :

48V 20Ah battery pack:

13-series lithium cells:

13S × 3.7V ≈ 48V

Step 3: Prototype Production

Prototype samples are created for:

• Engineering verification
• Tests fonctionnels

Testing includes:

• Tension
• Capacité
• Discharge performance
• Communication functions

Step 4: Reliability Testing

Electrical Performance Testing

Y compris :

• Charge/discharge testing
• Essais de durée de vie
• Essais de capacité

Safety Testing

Y compris :

• Protection contre les surcharges
• Protection contre la surcharge
• Protection contre les courts-circuits
• Temperature rise testing

Step 5: Mass Production

Manufacturing process:

Tri cellulaire
↓
Cell assembly
↓
Welding
↓
BMS installation
↓
Battery pack assembly
↓
Aging test
↓
Final inspection
↓
Shipment

6. Three Core Components of OEM Battery Packs

6.1 Battery Cell Selection

Common battery chemistries:

LiFePO4 Battery Cells

Avantages :

• Sécurité élevée
• Longue durée de vie
• Excellente stabilité thermique

Suitable for:

• AGV
• Energy storage
• Chariots élévateurs
• Robots industriels

NMC Lithium Battery Cells

Avantages :

• Densité énergétique plus élevée
• Compact size
• Conception légère

Suitable for:

• Véhicules électriques
• Outils électriques
• Portable equipment

6.2 Battery Management System (BMS)

BMS is the intelligent control system of a battery pack.

Main functions:

Protection Functions

Y compris :

• Protection contre les surcharges
• Protection contre la surcharge
• Protection contre les surintensités
• Protection contre les courts-circuits
• Protection de la température

Smart Communication

Advanced BMS supports:

• Communication CAN
• RS485
• Bluetooth APP

Used in:

• AGV
• AMR
• Équipements industriels

6.3 Battery Structure Design

Professional battery design should consider:

• Heat dissipation
• Waterproof performance
• Résistance aux chocs
• Maintenance convenience

Common protection ratings:

• IP65
• IP67
• IP68

7. OEM Battery Certification Requirements

Different markets require different certifications.

Les certifications les plus courantes sont les suivantes

UN38.3 focuses on transportation safety testing, while IEC 62133 focuses on battery safety performance. OEM buyers should confirm certification requirements based on their target market.

8. How to Choose OEM Batteries for Different Applications?

AGV / AMR Robot Batteries

Recommended:

LiFePO4 battery technology

Exigences clés :

• Longue durée de vie
• Fast charging capability
• Sécurité élevée
• Communication CAN

Typical voltages:

24V / 48V / 72V

Electric Bike Batteries

Facteurs importants :

• Conception légère
• Protection étanche
• Long range
• UL certification

Common systems:

36V
48V
52V

Batteries de stockage d'énergie

Recommended:

LiFePO4

Facteurs importants :

• Longue durée de vie
• Sécurité élevée
• Large capacity

Exemple :

51.2V 100Ah

Industrial Equipment Batteries

Requirements:

• High reliability
• Wide temperature operation
• Résistance aux chocs

Applications :

• Chariots élévateurs
• Machines de nettoyage
• Robots industriels

9. Common Mistakes When Purchasing OEM Battery Packs

Mistake 1: Only Comparing Prices

Low-cost batteries may involve:

• Lower-grade cells
• Simplified BMS
• Reduced testing procedures

Mistake 2: Only Focusing on Battery Cell Brands

A famous battery cell brand does not automatically guarantee a high-quality battery pack.

PACK quality also depends on:

• Conception technique
• Welding technology
• BMS matching
• Quality control process

Mistake 3: Ignoring Certifications

Without proper certifications, products may face:

• Customs clearance problems
• Market restrictions
• Réclamations des clients

10. OEM Battery Supplier Evaluation Checklist

Before choosing a supplier, confirm:

✅ Does the company have an independent battery R&D team?
✅ Can they provide prototype samples?
✅ Do they provide complete test reports?
✅ Can they support international certifications?
✅ Do they have export experience?
✅ Can they provide long-term supply?
✅ Do they offer technical support after delivery?

FAQ

Q1: How long does OEM battery development take?

Typical timeline:

• Solution design: 3-7 days
• Prototype development: 2-6 weeks
• Mass production: Depends on order quantity

Q2: What is the MOQ for customized battery packs?

MOQ depends on:

• Battery model
• Structural complexity
• Cell supply availability

Some manufacturers support small-batch prototype testing before mass production.

Q3: Can customers specify battery cell brands?

Oui.

Common options include:

• EVE
• Samsung SDI
• LG Energy Solution
• Panasonic
• FEB

Q4: Can OEM battery packs be exported globally?

Yes, but buyers should confirm:

• UN38.3
• FICHE DE DONNÉES DE SÉCURITÉ
• Shipping documents
• Target market certifications

Conclusion

Choisir le bon OEM battery pack manufacturer means selecting a long-term technology partner.

A professional OEM supplier provides more than batteries. They provide:

⚡ Battery solution design
⚡ Product safety assurance
⚡ Stable mass production capability
⚡ Global certification support

For companies developing AGV robots, electric vehicles, energy storage systems, and industrial equipment, a reliable OEM battery solution can reduce development risks and accelerate product commercialization.

Dongguan Yizhan Electronics Technology Co., Ltd.  specializes in lithium battery PACK OEM/ODM solutions, providing customized 18650, 21700, LiFePO4, and NMC battery solutions for AGV, AMR robots, electric vehicles, energy storage systems, and industrial equipment. We support 24V-72V customized battery development, smart BMS communication, waterproof designs, and global certification services.