# Active battery cell balancer

Canonical URL: https://eloragrid.ai/symbols/active-cell-balancer
Publisher: Elora Grid
Updated: 2026-10-27
Lookup label: BAL X
Drawing use: Schematic
Reference families: Manufacturer

An active balancer transfers energy between selected parts of a battery system.

## In plain English

### What does Active battery cell balancer mean?

An active balancer transfers energy between selected parts of a battery system.

### A simple example

A converter-based balancing path can move energy rather than only dissipating it in a resistor.

### What the drawings help you do

Identify the cell or pack sections between which energy can move, together with the balancing controller. The distinguishing feature is an energy-transfer circuit, not just a measurement of unequal cell voltages. Draw its power-transfer path separately from the information used to decide when to balance.

### Before using this reference

- Identify the source and destination of transferred energy.
- Show the selected converter or switching arrangement.
- Reference the controller’s cell-selection and operating conditions.

### Is active balancing lossless?

No. The transfer circuit has losses and design limits. Its distinction from passive balancing is that it redirects some energy instead of deliberately dissipating all removed balancing energy in a bleed path.

### Terms

- Energy transfer: Moving energy through a controlled electrical path.
- Balancing controller: The function that decides which battery sections should be balanced.

Concept diagram: Selected cell or pack section → Balancing converter → Another cell or pack section
Original functional explanation. Arrows show information or energy roles; two-headed arrows identify two-way interfaces. This is not a pinout, certified standards graphic or complete circuit.

- [Battery monitors and balancers](https://www.ti.com/product-category/battery-management-ics/battery-monitors-balancers/overview.html)


## What it represents

An active balancer transfers energy between selected parts of a battery system.
A converter-based balancing path can move energy rather than only dissipating it in a resistor.
Identify the cell or pack sections between which energy can move, together with the balancing controller. The distinguishing feature is an energy-transfer circuit, not just a measurement of unequal cell voltages. Draw its power-transfer path separately from the information used to decide when to balance. This is original functional artwork, not a certified standard graphic or device pinout.

## How to read it

- Identify the source and destination of transferred energy.
- Show the selected converter or switching arrangement.
- Reference the controller’s cell-selection and operating conditions.
- The energy-transfer path and control method depend on the selected balancing design.

## Information to show or reference

- Identify the source and destination of transferred energy.
- Show the selected converter or switching arrangement.
- Reference the controller’s cell-selection and operating conditions.

## Important distinction

The energy-transfer path and control method depend on the selected balancing design.

## Facts

- Representation type: Original functional block; not a certified IEC or IEEE graphic
- Concept input: Selected cell or pack section
- Concept output: Another cell or pack section

## Public references

- [Battery monitors and balancers](https://www.ti.com/product-category/battery-management-ics/battery-monitors-balancers/overview.html) — Texas Instruments. Battery monitors and balancers: public technical context for the named function. Product and compliance details remain with the publisher.

## Graphic scope

Independent original educational concept illustration by Elora Grid. Not a certified standards graphic or manufacturer footprint. Unitless; not to scale. Original artwork licence: https://creativecommons.org/licenses/by/4.0/. Publisher material is linked only.