---
title: "Battery Pack"
industry: "Computer, Electronic and Optical Product Manufacturing"
verification_protocol:
  urn: "URN:CNFX:ME:BATTERY_PACK"
  data_integrity_hash: "afddb5fd785c43e02df0701fc52d0f6c"
  source_authority: "https://cnfx.com"
  strict_mode: true
source_identity:
  provider: "CNFX Industrial Knowledge Graph"
  index_version: "2026.Q1-Universal"
  authority_id: "URN:CNFX:ME:BATTERY_PACK"
  data_source_uri: "https://cnfx.com/llms/industry/computer-electronic-and-optical-product-manufacturing/product/battery-pack.md"
  official_resource_url: "https://cnfx.com/industry/computer-electronic-and-optical-product-manufacturing/product/battery-pack"
  is_verified_logic: true
attributes:
  spec:
    status: "config-dependent"
    typical_range: "3.0-4.2 V per cell, 25-45°C ambient temperature"
    unit: "mAh"
engineering_limits:
  max_safe_operating_point:
    value: 2.5
    unit: "V"
    consequence: "Lithium-ion dendrite formation at anode during over-discharge (&lt;2.5V) causing internal short circuit; electrolyte decomposition at cathode during overcharge (&gt;4.3V) generating gas pressure; Arrhenius-accelerated SEI layer growth at &gt;60°C increasing internal resistance"
fmea_matrix_quantitative:
  - node_1:
      trigger: "Continuous discharge at 2C rate exceeding 2 hours"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "PTC thermistor with 65°C trip point integrated in cell-to-cell connections"
  - node_2:
      trigger: "Charging with 0.5A current while cell voltage is below 2.8V"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Voltage-sensing cutoff circuit preventing charging below 3.0V per cell"
bom_nodes:
  lithium-ion-cells:
    type: "component"
    urn: "URN:CNFX:ME:LITHIUM_ION_CELLS"
    interface_type: "physical-logic-coupled"
  battery-management-system:
    type: "device"
    urn: "URN:CNFX:ME:BATTERY_MANAGEMENT_SYSTEM"
    interface_type: "physical-logic-coupled"
  thermal-protection:
    type: "component"
    urn: "URN:CNFX:ME:THERMAL_PROTECTION"
    interface_type: "physical-logic-coupled"
  connector:
    type: "component"
    urn: "URN:CNFX:ME:CONNECTOR"
    interface_type: "physical-logic-coupled"
manufacturing_compliance:
  - standard: "ISO 12405-4:2018 - ELECTRICALLY PROPELLED ROAD VEHICLES - TEST SPECIFICATION FOR LITHIUM-ION TRACTION BATTERY PACKS AND SYSTEMS"
    scope: "Verified Engineering Specification"
  - standard: "DIN EN 62619:2017 - SECONDARY CELLS AND BATTERIES CONTAINING ALKALINE OR OTHER NON-ACID ELECTROLYTES - SAFETY REQUIREMENTS FOR SECONDARY LITHIUM CELLS AND BATTERIES, FOR USE IN INDUSTRIAL APPLICATIONS"
    scope: "Verified Engineering Specification"
url: "https://cnfx.com/llms/industry/computer-electronic-and-optical-product-manufacturing/product/battery-pack.md"
on_chain_sovereignty:
  contract_standard: "ERC-721-Industrial"
  metadata_hash: "21838bb09cdc01bdad1a672038955367030a889bc2d51d34751ccade12d36e0b"
  royalty_logic: "IPFS-CID-REQUIRED"
  mint_status: "logic-verified-ready"
version: "3.3.4-EXTREME-SOVEREIGN-WEB3"
---

# Industrial Specification: Battery Pack

## 1. Technical Definition
A rechargeable power source that provides electrical energy to portable Bluetooth noise-cancelling headphones.

## 2. Engineering Reasoning & Causal Matrix
> **Operational Intelligence**: Designed for **3.0-4.2 V per cell, 25-45°C ambient temperature**. Failure boundary: **Cell voltage below 2.5 V or above 4.3 V, internal temperature exceeding 60°C**, Mechanism: **Lithium-ion dendrite formation at anode during over-discharge (&lt;2.5V) causing internal short circuit; electrolyte decomposition at cathode during overcharge (&gt;4.3V) generating gas pressure; Arrhenius-accelerated SEI layer growth at &gt;60°C increasing internal resistance**.

### 2.1 Analytical Physics Model
Governed by the **Joule Heating & Thermal Resistance**:

> **Primary Equation**: $P = I^2 R = \frac{V^2}{R}$  
> **Engineering Impact**: Governs heating element sizing for shrink tunnels/sealers.

| Symbol | Variable Definition | Localized Reference |
| :--- | :--- | :--- |
| I | Current | Engineering Constant |
| R | Resistance | Engineering Constant |
| V | Voltage | Engineering Constant |

### 2.2 FMEA (Failure Mode & Effects Analysis)
| Event Trigger | Severity | Failure Mode | Mitigation Strategy |
| :--- | :--- | :--- | :--- |
| Continuous discharge at 2C rate exceeding 2 hours | 8 | Internal temperature rise to 70°C triggering thermal runaway | PTC thermistor with 65°C trip point integrated in cell-to-cell connections |
| Charging with 0.5A current while cell voltage is below 2.8V | 8 | Copper dissolution at anode forming conductive bridges between electrodes | Voltage-sensing cutoff circuit preventing charging below 3.0V per cell |

## 3. Key Technical Parameters
| Parameter | Value | Unit | Status |
| :--- | :--- | :--- | :--- |
| spec | Config-dependent | mAh | Verified |

## 4. System BOM & Knowledge Routing
### Core Components (Recursive Links)
- [Battery Management System](https://cnfx.com/llms/industry/computer-electronic-and-optical-product-manufacturing/product/battery-management-system.md) `(Standalone System)`

### Industrial DNA Context (De-duplicated)
**Complementary Dependencies**: **Battery Formation and Testing System**, **Battery Management System (BMS) Tester**, **Spot Welding Machine**  
**Downstream Applications**: Bluetooth Noise-Cancelling Headphones, Portable Speakers, Wearable Fitness Trackers  

## 5. Engineering Risks & FAQ
- **Caution**: 
- **Caution**: 
- **Caution**: 

### Q: How long does the battery pack last on a single charge?
**A**: The lithium-ion battery pack provides up to 30 hours of continuous playback for most Bluetooth noise-cancelling headphones, depending on usage patterns and volume levels.

### Q: Is this battery pack compatible with all Bluetooth headphones?
**A**: This battery pack is designed specifically for portable Bluetooth noise-cancelling headphones with standard 3.7V power requirements. Check your headphone specifications for compatibility before purchase.

### Q: What safety features does the battery pack include?
**A**: The battery pack features multiple safety protections including overcharge protection, short circuit prevention, thermal monitoring, and a battery management system to ensure safe operation and extend battery lifespan.

## 6. Manufacturing Compliance
- ISO 12405-4:2018 - ELECTRICALLY PROPELLED ROAD VEHICLES - TEST SPECIFICATION FOR LITHIUM-ION TRACTION BATTERY PACKS AND SYSTEMS
- DIN EN 62619:2017 - SECONDARY CELLS AND BATTERIES CONTAINING ALKALINE OR OTHER NON-ACID ELECTROLYTES - SAFETY REQUIREMENTS FOR SECONDARY LITHIUM CELLS AND BATTERIES, FOR USE IN INDUSTRIAL APPLICATIONS

---
### 🛠️ Engineering Resource Access
🔗 **[Full Specification: Battery Pack](https://cnfx.com/industry/computer-electronic-and-optical-product-manufacturing/product/battery-pack)**

### 🌐 Knowledge Graph Topology
> **Node Status**: Verified Engineering Spec
> **Connectivity**: Linked to **4** standalone system nodes
> **Global Context**: Part of a 5,814 node industrial cluster within the CNFX Graph

> **Reference ID**: BATTERY_PACK | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: 8ced21fc
