45kWh Lithium BMW i3 Battery Replacement

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45kWh Lithium BMW i3 Battery Replacement

Product Description

This 45kWh Lithium BMW i3 Battery is engineered for 2014–2021 i3 BEV/REX models. Direct-fit mounting and a simplified connection workflow help reduce installation effort and improve repeatability across retrofit jobs. Integration support helps maintain stable vehicle communication and consistent dash behavior after the swap. Each pack follows defined pre-shipment verification steps to reduce rework and warranty risk.

Long Cycle Life

Built for consistent day-to-day performance over time. Cell selection and pack architecture prioritize durability and stable output across repeated charge cycles and real-world driving.

OEM-Fit Replacement

A standardized module set is designed for BMW i3 battery replacement work. Consistent fitment helps reduce one-off surprises and keeps installation timelines predictable.

BMS/CAN Pairing Support

Pairing and reprogramming support ensures the vehicle communicates properly with the replacement pack, keeping SOC and range readouts stable while reducing common post-upgrade warning lights.

Controlled Quality

Quality control begins with cell screening and continues through pack-level aging verification. Shipping is prepared for real-world delivery, with protected packaging and a clear packing list to support smooth receiving, handling, and installation—especially for cross-border orders.

Specification

Model	PL-N2545
Configuration	1P24S
Modules	4
Rated Capacity	129Ah
Nominal Voltage	88.8V
Rated Energy	11.45kWh
Maximum Charge Voltage	100.8V
Minimum Discharge Voltage	67.2V
Max. Continuous Charge Current	200A
Max. Peak Charge Current	300A
Max. Continuous Discharge Current	350A
Max. Peak Discharge Current	600A
Dimension	170011501300mm
Weight	273kg
Charge Temperature	0~55ºC
Discharge Temperature	-20~55ºC

Polinovel EV Battery Benefits

OEM-Fit Integration

Built for clean fitment and practical installation. The pack structure is designed to match original packaging and mounting logic, helping reduce rework, shorten turnaround time, and keep the vehicle’s layout neat.

Verified Safety Features

Safety is built into the system design. Integrated monitoring and multi-layer protection help manage abnormal voltage, temperature events, and short-circuit risks—supporting durability and reliable operation.

Vehicle Communication Ready

Designed to work with vehicle electronics more smoothly during replacement. Stable communication and system behavior help reduce mismatch risk, warning lights, and commissioning headaches for installers.

Solid Product Warranty

Polinovel provides a clear, dependable warranty that covers performance and service life expectations for EV battery replacement products. It’s built to reduce project risk and give customers confidence after installation.

Built-in BMS Protection

Over Charge/Discharge Protection

Monitors the battery voltage and ensures that it does not exceed or fall below a certain value to prevent over charge/discharge.

Temperature Protection

Monitors the temperature of each cell and protects the battery if the temperature exceeds/goes below a preset threshold.

Short Circuit Protection

Interrupts the flow of electricity to prevent any further damage after detecting a short-circuit.

Cell Balancing

Ensures all the cells are kept at the same voltage or SOC and helps to extend the life of the battery.

Polinovel Promises

High-performance Battery Solutions

Our team of experts thoroughly analyzes market needs and actively explores new technologies to create innovative lithium battery solutions. Our lithium ion battery products are manufactured using state-of-the-art technology and strict quality control measures to ensure they offer superior performance and great reliability.

Quality Assurance

As a reliable Li ion battery supplier, we offer products that meet global standards. Our lithium battery products are certified with CE, MSDS, RoHS, and UN38.3 certifications. When you opt for our products, be assured that quality and safety is our utmost concern.

Exceptional Customer Service

Our commitment is to provide excellent customer service from beginning to end. Our team has a wealth of experience and is focused on providing the most satisfying experience for our customers. We offer quick and effective service, whether it's responding to product inquires, assisting with orders, or dealing with technical issues.

On-time Delivery

As an experienced lithium battery supplier in the industry, we have an exceptional supply chain system and fast logistics. We are committed to providing efficient delivery to ensure that our customers receive their orders on time.