Deep Cycle 12V OEM Lithium Batteries Electrical Connection And Safety Specifications

1. Preparation before installation
Environmental requirements: The installation location should be dry and ventilated, away from heat sources (for example, the engine compartment should be kept at a distance of more than 20 centimeters), and avoid direct sunlight The load-bearing capacity of the fixed surface is equal to or greater than the weight of the battery (approximately 15-20 kilograms for a 12V 160AH lithium battery)
Tools and materials: Insulated wrench, multimeter, heat shrink tubing, fire-resistant tape The wire should match the current (160AH full charging current ≈ 32A, it is recommended to use 10-16mm ² copper wire)
2. Electrical connection steps
Precautions for series/parallel connections:
Single group use: Connect the BMS output terminal (+, - pole) directly to the load, and connect the BMS input terminal to the battery pack (connect 3-4 batteries in series and connect the positive and negative poles in order)
Multiple group expansion: If higher capacity is required (such as 320AH), two 12V batteries need to be connected in parallel (only supports batteries of the same model and batch. When parallel, the positive pole should be connected to the positive pole, and the negative pole should be connected to the negative pole. Each branch should be connected in series with a 10A fuse)
Grounding and anti reverse connection:
The shell needs to be grounded through a yellow green wire (grounding resistance ≤ 4 Ω) to prevent leakage The positive and negative pole connections should be marked with colors (red for the positive pole and black for the negative pole) to prevent reverse connection (which can burn out the BMS and even cause a fire)
3. Fixation and protection
Fix the battery with a metal bracket or strap, and place a shock-absorbing rubber pad (damping coefficient ≥ 0.3) between the bracket and the battery to prevent welding points from falling off due to vibration during driving The terminal block needs to be insulated with heat shrink tubing, and exposed wires should be wrapped with corrugated tubing to prevent wear and tear

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