LEWA metering systems 
for testing of batteries on special test facilities

Drives in electric vehicles require special batteries to meet the automotive sector’s requirements regarding safety, performance, durability, service life, cost and environmental protection. Only specially tested batteries can be used in electric vehicles. Therefore, these batteries run through worst case scenarios in long-term test cycles during extreme operating conditions.

LEWA metering systems have been successfully used in battery test applications for many years. For testing purposes, for example a water-glycol mixture is used. LEWA metering systems guarantee high-precision control of the volume flow and pressure.

Solutions

Metering systems for battery test facilities. Precise control, reproducible test results.

When traction batteries for electric vehicles are tested, extreme operating conditions are simulated. The test cycles vary in length from a few minutes to several hours. LEWA metering systems are used to dose a testing fluid in a closed loop to check the batteries at different temperatures in a wide temperature range.

These LEWA metering systems are divided into different layers: The first consists of a base frame, a drip pan and a cooling water connection. The second includes a tempering unit, metering pumps, measuring instruments and process connections. The third consists of a control cabinet, operating unit, controls and interfaces. By those, the metering systems can be easily connected to customer-side distributed control systems (DCS).

Background

Batteries in electric vehicles

In electric vehicles, so-called traction batteries are used. Lithium-ion batteries are the preferred type of traction batteries. In 2014, almost exclusively lithium-ion batteries were installed in electric vehicles.

The batteries are the central and at the same time the most expensive component of an electric vehicle and can add up to about 40% of the total costs. The traction batteries must be able to withstand a variety of charging cycles.

The so-called "memory effect", which is typical for many types of batteries, must not occur. The memory effect describes a loss of capacity of the batteries emerging over time and is characterized by an early voltage drop. As a minimum voltage is required, the battery runtime is sometimes significantly lower.

In the manufacturer's tests, the electric vehicle batteries are subjected to extreme operating conditions (such as high and low temperatures) in test cycles of varying duration. This simulates and examines the influences of the batteries’ aging process.

Industries

Other Industries

As specialists in fluid handling, we of course also have experience in many other industries. Simply contact our consultants to find out more!

Products

LEWA ecoflow® diaphragm metering pump

LEWA ecoflow diaphragm metering pump all around talent

The ecoflow® diaphragm metering pump from LEWA is a true all-around talent in the field of metering and mixing and can be used in all industries.

LEWA ecodos® mechanical diaphragm metering pump

LEWA ecodos diaphragm metering pump

The ecodos® mechanical diaphragm metering pump from LEWA is suitable for all pumping and metering tasks in the low-pressure range.

Customer-Specific Metering, Mixing or Filling Systems from LEWA

LEWA production units

LEWA develops customized production units for metering, mixing, and filling fluids. Contact us and let us advise you!

Customer-Specific Metering Systems from LEWA

LEWA customer specific metering systems

LEWA provides you with custom-designed metering systems according to your specifications. Trust in our experience gained from 60 years of metering technology.

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© 2019 LEWA GmbH
© 2019 LEWA GmbH