Battery Electrolyte Level and Cell Leakage Monitoring

Alpais provides status-based electrolyte level and electrolyte leakage sensor integration for vented industrial batteries, including applicable Ni-Cd and flooded lead-acid battery configurations.

The solution uses a dedicated Battery Module configuration with sensor inputs. Alarm status from the connected sensors is collected through the Alpais Battery Monitoring System architecture and displayed in Alpais Software.

What This Solution Covers

  • Low-electrolyte level alarm monitoring
  • Electrolyte leakage alarm monitoring at battery or cell level
  • Dedicated Battery Module inputs for the selected sensors
  • Status-based OK / Alarm display in Alpais Software
  • Alarm history and email notification for registered users
  • Application to compatible vented Ni-Cd and flooded lead-acid batteries

Terminology Note

On this page, cell leakage means physical electrolyte leakage detected around an individual battery or cell. It does not mean electrical leakage current, insulation resistance measurement or DC ground-fault detection. Electrical ground-fault monitoring is covered separately on the DC Ground Fault Detection page.

Battery Electrolyte Level Monitoring

A compatible electrolyte level sensor provides a status signal when the electrolyte falls below the sensor's configured detection point. Alpais receives this status and presents it as a level alarm in the monitoring interface.

The sensor does not replace the battery manufacturer's inspection, topping-up or maintenance procedure. Sensor suitability depends on the battery design, electrolyte type, cell geometry, installation method and manufacturer requirements.

Electrolyte Leakage Monitoring

A compatible leakage sensor can be installed to detect electrolyte in the selected area around the battery or cell. When the sensor changes state, Alpais records and displays the resulting leakage alarm.

Leakage-sensor placement depends on the battery terminal structure, case design, rack arrangement and the areas where electrolyte could collect. The sensor configuration must therefore be evaluated for each battery model and project.

Electrolyte level sensor and electrolyte leakage sensor integrated with Alpais BMS

Sensor Options

  • Low-electrolyte level sensor
  • Electrolyte leakage sensor
  • Dedicated Battery Module with sensor inputs

Final compatibility must be confirmed from the sensor and battery documentation before installation.

Dedicated Battery Module Configuration

The standard Alpais Battery Module provides the connections required for battery measurement and module-to-module communication. For electrolyte level and leakage sensing projects, a dedicated Battery Module version is used with additional sensor inputs.

The sensor inputs collect status information from the connected devices and transfer it through the standard BATMOD, STRMOD and CONMOD communication structure. The exact module version and connector arrangement must be confirmed for the ordered project configuration.

Standard Alpais Battery Module and dedicated version with electrolyte sensor inputs

Typical Application on the Battery

Example placement of electrolyte level and leakage sensors on a wet-cell battery

A project configuration may include the following components, subject to the battery design and selected sensors:

  • One dedicated Battery Module per monitored battery or cell
  • Standard battery measurement connection
  • One electrolyte level sensor where compatible with the battery design
  • One electrolyte leakage sensor or sensor set according to the required coverage

Quantities and sensor locations are project-specific. A configuration used for one battery model should not be treated as universal for all Ni-Cd or flooded lead-acid batteries.

Monitoring, Alarms and Notifications

The electrolyte level and leakage inputs are status-based. Alpais normally displays an OK or Alarm condition rather than a continuously measured electrolyte height or leakage volume.

Depending on the configured software version, the statuses can be displayed as Level and Leakage in the general battery list. When an alarm condition occurs, the event can be recorded and included in email notifications for registered users.

Additional alarm, history and reporting functions are described on the Alpais Battery Monitoring Software page.

Electrolyte level and leakage status shown in Alpais Battery Monitoring Software

Battery Types and Project Compatibility

The solution is intended for compatible vented batteries where electrolyte level or physical leakage can be monitored using the selected sensors. Typical applications may include industrial Ni-Cd batteries and flooded lead-acid batteries.

Compatibility must be checked against the battery manufacturer's instructions, terminal configuration, cell material, electrolyte chemistry, operating temperature, enclosure arrangement and maintenance procedure.

Information Required for Project Evaluation

Project evaluation should include the battery manufacturer and model, battery chemistry, cell quantity, terminal layout, case dimensions, electrolyte access point, rack arrangement, sensor model, sensor output type and required alarm workflow.

Need Electrolyte Level or Leakage Monitoring?

Share the battery model, chemistry, terminal arrangement and sensor requirements with Alpais for compatibility and project evaluation.

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