We need Lithium-Ion Batteries to make renewable energy viable.

The transition from fossil fuels to renewables is a critical element in the fight against climate change, and the transition to a sustainable world.

With the rapidly increasing share of our electricity being produced by variable renewable sources, the need to install and maintain a new generation of equipment arises, which fundamentally differs from traditional synchronous generators. From photovoltaic panel inspections to measuring the efficiency of power conditioners, Hioki is at the forefront of developing test and measurement equipment uniquely suited for this task.

The integration of these new and diverse elements into the existing grid infrastructure presents the challenge of managing their inherent variability. The need for storing electrical power to balance supply and demand becomes more critical. As the technology for producing lithium-ion batteries advances rapidly, and prices continue to fall, we are seeing an increase in their grid scale deployments around the world. However, the rapid adoption of electric vehicles and the electrification of our transportation is facilitating a greater shift from fossil fuels towards renewable energy. This has become a reality only in recent years, with the rapid advances in Lithium-Ion battery technology.

Hioki manufactures advanced test and measurement equipment that is used in almost every stage of Lithium-Ion batteries manufacturing cycle.

From advanced methods of measuring sheet resistivity of the electrodes, verifying the integrity of tab welds with precise resistance measurements, identifying insulation problems, and measuring the internal impedance of the finished cell in addition to providing test solutions for the battery management system as well as packaged modules.

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Conventionally, a method known as DC-IR measurement has been used to measure the internal resistance of lithium-ion batteries as a way to evaluate their performance and quality. In this method, the internal resistance is measured after charging the battery and then discharging it by allowing a large current to flow from the battery so as to produce a voltage drop. Since the initial charging process takes from several minutes to several tens of minutes, the entire internal resistance measurement process required by the conventional approach takes up to an hour. The time-consuming nature of this approach has highlighted the need to address poor measurement efficiency and low productivity.

Hioki developed the Battery Impedance Meter BT4560 to resolve this shortcoming. The new instrument uses a method known as low-frequency AC-IR measurement, which enables performance and quality to be evaluated in roughly the same manner as the conventional DC-IR measurement method. Specifically, the battery’s internal impedance is measured at a low frequency of 1 Hz or less, eliminating the need for a time-consuming charging process. Consequently, the BT4560 can complete AC-IR measurement in about 10 seconds*, versus several tens of minutes to about one hour for the conventional approach. This capability dramatically improves measurement efficiency.

By using a Cole-Cole plot to observe the changing internal resistance of the battery with frequency sweep, the electrode reaction resistance, electrolyte resistance and welding resistance can be observed distinctly, which improves the quality of battery cell inspections and helps to understand the impact of process variations.

 

Key Features

  • Low-frequency AC-IR measurement* : Measure the reaction resistance of a battery
    • *The BT4560 ensures battery cell quality by measuring internal impedance at a low frequency of 1 Hz or below
  • Extremely reliable measurements for low-impedance batteries
    • *The BT4560 uses a testing current of 1.5 A at the 3mΩ range, which improves the S/N ratio
  • Circuit configuration highly tolerant of contact and wire resistance to provide stable measurements
  • Voltage measurement function equivalent to 6-digit DMM (± 0.0035% rdg.)

 


 

The rapid adoption of electric vehicles in the place of the internal combustion engine, represents a massive potential for overall energy savings, and significantly increases the role of renewable energy in powering our vehicles. Electric vehicles demand very high voltage Lithium Ion battery packs, combined with very low internal resistance. The BT3564 Battery HiTester can measure pack voltage and total resistance, as well as bus bar resistance up to 1000V.

 

Key Features

  • Measure high-voltage battery packs up to 1000V
  • Production line testing of high-voltage battery packs for EV, PHEV
  • 0.1 μΩ to 3000 Ω internal resistance range (pack total resistance, bus bar resistance)
  • Spark discharge reduction function
  • Analog output function
  • Optional measurement probe available for 1000 V and high-voltage battery packs

 


 

The RM2610 isolates and quantifies the resistance characteristics of electrode sheets, a major component of lithium-ion batteries (LIBs), as two components: the composite layer resistance and the interface resistance between the composite layer and collector.  The system allows users to visualize these two quantities by measuring the surface of the electrode sheet with a test fixture that consists of an array of test probes and then using proprietary analytical techniques to quantify them.

Key Features

  • Measure composite resistivity [Ωcm]
  • Measure interface resistance between the composite layer and current collector [Ωcm^2]

 


 

Webinar Invitation

We are excited to invite you to our webinar this month!

The topic: Lithium Ion Batteries and the Renewable Energy Future

Click Here to Register Today! 

For studying the internal chemistry of a battery cell, Hioki instruments use a technique known as Electrochemical Impedance Spectroscopy.

We are honored to announce our guest speaker, Jill Pestana who will talk about this fascinating scientific technique and offer her perspectives as a distinguished battery scientist.

 

In this webinar, we will provide an overview of renewable energy sources, and the unique challenges they pose for grid integration.

We will make the case that Lithium-Ion battery technology is playing a pivotal role in this transformation – not only for grid power storage but also by facilitating the use of renewable energy for our transportation needs.

Our guest speaker Jill Pestana a Sr. Scientist who develops cutting-edge LIB technology and filed 11 patents (and counting) on inventions and processes related to battery technology will give us a background on this exciting journey, where it's heading, and outline some of the challenges in test and manufacturing.

Topics to be covered:

  • What is variable renewable energy, their common characteristics, and how to manage their inherent variability.
  • What are their common characteristics, and how do they differ from conventional synchronous power generation.
  • The types of grid energy storage, and the increasing role of Li-ion battery storage.
  • How electric vehicles and lit