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

Examples:

• 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
• Shock resistance
• IP65/IP67 waterproof protection

2.2 Matching Specific Performance Requirements

Standard batteries may not meet the requirements of professional equipment.

OEM solutions can customize:

Voltage Options

Common configurations:

• 12V
• 24V
• 36V
• 48V
• 51.2V
• 72V

Capacity Options

Examples:

• 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

Examples:

• AGV robots
• AMR robots
• E-bikes
• Forklifts
• Golf carts
• Energy storage systems

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
• Charging current
• Discharge rate
• Communication protocol

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

Including:

• Voltage testing
• Internal resistance testing
• Capacity testing
• 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:

• Automated assembly lines
• Laser welding equipment
• Spot welding equipment
• Aging test rooms
• High and low-temperature testing equipment
• Waterproof testing equipment

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
• BMS development
• Parameter adjustment

Mechanical Engineering Team

Responsible for:

• CAD design
• Battery housing design
• Waterproof structure design

Testing Team

Responsible for:

• Performance verification
• Safety testing
• Reliability testing

5. OEM Battery Development Process

A complete development process usually includes:

Step 1: Requirement Confirmation

Customer provides:

• Application details
• Battery specifications
• Size limitations
• Certification requirements

Step 2: Battery Solution Design

Engineers determine:

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

Example:

48V 20Ah battery pack:

13-series lithium cells:

13S × 3.7V ≈ 48V

Step 3: Prototype Production

Prototype samples are created for:

• Engineering verification
• Functional testing

Testing includes:

• Voltage
• Capacity
• Discharge performance
• Communication functions

Step 4: Reliability Testing

Electrical Performance Testing

Including:

• Charge/discharge testing
• Cycle life testing
• Capacity testing

Safety Testing

Including:

• Overcharge protection
• Over-discharge protection
• Short circuit protection
• Temperature rise testing

Step 5: Mass Production

Manufacturing process:

Cell sorting
↓
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

Advantages:

• High safety
• Long cycle life
• Excellent thermal stability

Suitable for:

• AGV
• Energy storage
• Forklifts
• Industrial robots

NMC Lithium Battery Cells

Advantages:

• Higher energy density
• Compact size
• Lightweight design

Suitable for:

• Electric vehicles
• Power tools
• Portable equipment

6.2 Battery Management System (BMS)

BMS is the intelligent control system of a battery pack.

Main functions:

Protection Functions

Including:

• Overcharge protection
• Over-discharge protection
• Over-current protection
• Short-circuit protection
• Temperature protection

Smart Communication

Advanced BMS supports:

• CAN communication
• RS485
• Bluetooth APP

Used in:

• AGV
• AMR
• Industrial equipment

6.3 Battery Structure Design

Professional battery design should consider:

• Heat dissipation
• Waterproof performance
• Shock resistance
• Maintenance convenience

Common protection ratings:

• IP65
• IP67
• IP68

7. OEM Battery Certification Requirements

Different markets require different certifications.

Common certifications include:

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

Key requirements:

• Long cycle life
• Fast charging capability
• High safety
• CAN communication

Typical voltages:

24V / 48V / 72V

Electric Bike Batteries

Important factors:

• Lightweight design
• Waterproof protection
• Long range
• UL certification

Common systems:

36V
48V
52V

Energy Storage Batteries

Recommended:

LiFePO4

Important factors:

• Long lifespan
• High safety
• Large capacity

Example:

51.2V 100Ah

Industrial Equipment Batteries

Requirements:

• High reliability
• Wide temperature operation
• Shock resistance

Applications:

• Forklifts
• Cleaning machines
• Industrial robots

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:

• Engineering design
• Welding technology
• BMS matching
• Quality control process

Mistake 3: Ignoring Certifications

Without proper certifications, products may face:

• Customs clearance problems
• Market restrictions
• Customer complaints

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?

Yes.

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
• MSDS
• Shipping documents
• Target market certifications

Conclusion

Choosing the right 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.