KRI Product Lineup

Our company conducts "battery health check-ups" to ensure batteries are used safely and for a long time. From a KRI perspective, we can analyze and predict the battery's condition, remaining lifespan, risks, and limits. To use batteries safely and for an extended period, it is essential to have the technology to "see" inside the battery. Please feel free to contact us when you need our services. 【Diagnosis Content (Partial)】 <Internal Condition Assessment> ■ Detailed analysis of electrode structure, positive/negative electrode balance, chemical state, etc. ■ Non-destructive testing, disassembly analysis <Limit Assessment> ■ Evaluation of limits during low-temperature overvoltage and high-temperature load reactions that affect secondary degradation *For more details, please download the PDF or feel free to contact us.

At our company, battery and system engineers, materials engineers, and analytical engineers collaborate from their respective perspectives to elucidate phenomena and mechanisms. In the fusion technology of operando CT and image analysis (cell thickness and displacement analysis), we acquire three-dimensional images while intermittently and continuously charging and discharging, analyze the images, and evaluate changes. We provide a one-stop solution to clarify uncertain and unknown phenomena in battery development. 【Ultra-high resolution SEM and NMR (partial)】 ■ Potential contrast observation to distinguish materials that are difficult to differentiate through compositional analysis based on differences in conductivity. ■ Observation of sharp fiber shapes without "bulking" due to deposited films. ■ Understanding the bonding state of silane coupling agents chemically bonded to the substrate surface. ■ Observation of intermolecular interactions between phosphine oxide and the substrate. *For more details, please download the PDF or feel free to contact us.

Our company is advancing the development of materials and battery/operational technologies focused on battery lifespan. The CFP, which is one of the components of LCA (Life Cycle Assessment), has been incorporated into the European Battery Regulation, and efforts towards CFP will be accessible through the battery passport, becoming a direct evaluation target. Our technology contributes to reducing CFP through the ultra-long lifespan of cells and maximizing warranty periods through diagnostic technology. [Expectations for ultra-long lifespan technology from the perspective of CFP] - Reduction of CFP through the ultra-long lifespan of cells (5 times the usage period ⇒ CFP 1/5) - Maximization of total energy consumption through optimal control - Maximization of warranty periods through diagnostic technology, etc. *For more details, please download the PDF or feel free to contact us.

The "degradation diagnosis technology" that adds value to EVs and storage batteries is a technology for handling EVs and storage batteries as assets safely and for a long time. By utilizing historical data, it allows for understanding the condition of the battery without stopping operations, and diagnoses future risks through simple and short-term spot data. It can be used for understanding performance and value assessment after degradation, as well as for appropriate reuse. Additionally, we are currently conducting demonstration tests of the degradation diagnosis technology using EVs from the Daigas Group. [Diagnosis Content] ■ Battery capacity and resistance from historical data ■ Secondary degradation risk of the battery from spot data *For more details, please download the PDF or feel free to contact us.

Our company offers a service to assess the limits of batteries. Understanding the limits of batteries, such as primary and secondary degradation in durability, and conditions like smoke or fire during thermal runaway, is important to know the acceptable conditions and levels. Without being swayed by evaluation results, battery engineers make judgments based on mechanisms, and with an understanding of these mechanisms, they find solutions within the limits. 【Diagnosis Contents】 ■ Charging (Temperature, Rate) ■ Heat ■ Durability ■ Safety *For more details, please download the PDF or feel free to contact us.

Our company is working on the development of battery technology that enables 5-minute charging. Currently, EV charging takes 15 to 30 minutes and faces challenges such as reduced lifespan and lithium plating. To achieve 5-minute charging, it is necessary to address these issues. Our company is pursuing the realization of 5-minute charging through various approaches, including electrode technology, diagnostic technology, and analytical technology. 【KRI's technologies that enable 5-minute charging】 ■ Electrode technology ■ Analytical technology ■ Diagnostic technology *For more details, please download the PDF or feel free to contact us.

S.E.I. Co., Ltd. is a company of the KRI group that can realize the envisioned product image with high-quality prototype cell manufacturing technology. Since its establishment in 1999, it has been engaged in the development of battery materials and battery technology for PHEVs and EVs, with a mission to contribute to the realization of a decarbonized society. Additionally, it aims to accelerate customers' battery and device development with a vision of on-site capability, technical expertise, and speedy, flexible service. 【Business Activities】 ■ Electrode mixing and construction ■ Cell prototyping and evaluation ■ New technology development *For more details, please download the PDF or feel free to contact us.

Our company has established an environment for prototyping and evaluating both small pellet cells for material potential assessment and laminated cells that allow for more practical evaluations. All-solid-state batteries require high-pressure interface bonding treatment to join the active material-solid electrolyte and the interfaces between solid electrolyte particles. At KRI, we are considering the prototyping of evaluation batteries using Roll to Roll and warm isostatic pressing (WIP). 【Cells Available for Prototyping and Evaluation】 ■ Small Pellet Cell (φ10mm) ■ Laminated Cell (electrode size can be customized) *For more details, please download the PDF or feel free to contact us.

The energy density and safety of solid-state batteries are greatly influenced by the choice of solid electrolyte materials. There are several solid electrolyte materials, each with its own challenges. Development is underway using sulfide-based solid electrolytes with excellent ionic conductivity and moldability for batteries used in electric vehicles (EVs). *For detailed information, please refer to the attached PDF. Feel free to contact us for more details.*

We would like to introduce our dry electrode manufacturing technology based on PTFE binders. By controlling the formulation and mixing method of positive electrode materials, conductive agents, and binders, as well as fibrillation and rolling methods, it is possible to produce high-strength and flexible dry electrode films. At KRI, we possess the technology and equipment to support material selection, prototype evaluation, and electrochemical property assessment for dry electrodes. We also accommodate material specifications from clients. 【Proposal Contents】 - Evaluation of dry electrode manufacturing using not only PTFE binders but also other binders - Assessment of active materials suitable for dry electrodes (for both positive and negative electrodes) and conductive agents - Evaluation of applicability to all-solid-state batteries - Scale-up evaluation of the dry electrode process - Experiments can also be conducted in a low-humidity environment as we have a dry room *For more details, please download the PDF or feel free to contact us.

At our company, we can effectively utilize valuable safety evaluation data through discussions with KRI engineers regarding each test result, aimed at solving issues and clarifying events. We conduct numerous evaluations, including custom tests for users related to practical use assessments and advice, as well as safety mechanism analyses. Additionally, we perform safety evaluations and considerations during module and packaging processes, as well as effectiveness verification of various functional materials and special structures. [Evaluation Content (Partial)] ■ Custom tests for users (assessments and advice related to practical use) ■ Safety mechanism analysis - Model testing and analysis/disassembly analysis using small cells - Trigger analysis for thermal runaway - Gas collection and analysis during testing, etc. *For more details, please download the PDF or feel free to contact us.

Our "One-Stop Service for Secondary Batteries" integrates battery and system design guidelines with material technology to formulate hypotheses aimed at meeting user requirements and solving challenges, from experimental planning to verification. In thermal management, we offer precise evaluations tailored to the required heat dissipation characteristics, considering factors such as the direction in which heat needs to be dissipated and the operating temperature. Please feel free to contact us when you need assistance. 【Methods for Evaluating Heat Transfer】 ■ Periodic Heating Radiation Thermometry ■ Laser Flash Method *For more details, please download the PDF or feel free to contact us.

The document discusses "the risks of cell enlargement and the effects of functional materials." It explains technologies that prevent temperature rises from exceeding 100°C below the ignition point of the electrolyte (approximately 450°C), even in the event of thermal runaway due to internal short circuits, which is a standard that allows for smoke without ignition. It also covers technologies that reduce the combustion time of trigger cells and mechanisms such as inter-cell insulation materials and heat storage and release, which keep adjacent cells' temperature rises below 50°C of the thermal runaway initiation temperature. Please feel free to download it for your use. [Contents] ■ Technologies to suppress the thermal runaway level of individual cells ■ Preventive measures to avoid pack ignition and explosion (risk of human injury) *For more details, please download the PDF or feel free to contact us.

This document summarizes the situation of LIB-related accidents occurring both domestically and internationally, as well as the underlying issues. The balance between high energy density and safety continues to be disrupted, and it includes data on domestic and global accident situations. This is a useful resource for considering essential issues such as safety during internal short circuits, understanding the condition during aging, and designing for fire response, so please take a look. [Contents] ■ Domestic LIB-related accident situation ■ Global LIB-related accident situation *For more details, please download the PDF or feel free to contact us.

Our company is committed to developing the necessary technologies for mobility batteries to realize a mobility society that considers people and the environment. We aim to create long-lasting and highly reliable batteries that can be used "longer" and "safer," as well as high energy density and fast charging solutions to make them "smaller" and "easier to use." Furthermore, we are also pursuing operation, prediction, and reuse for "appropriate utilization." [KRI's Vision for the Battery World] - High energy density and fast charging that are "smaller" and "easier to use" - Long-lasting, highly reliable, and safe batteries that can be used "longer" and "safer" - Consideration for resources and the environment through recycling, process reduction, and elimination of Co, Ni, and F - "Appropriate value judgment" through diagnostics (SOH, SOS) - "Appropriate utilization" through operation, prediction, and reuse *For more details, please download the PDF or feel free to contact us.

Our company provides support for the development of high-capacity materials suitable for mobility. In lithium-ion batteries, it is necessary to consider the material shape based on electrode properties. At KRI, we implement material development support, including particle design, doping, and surface coating technologies. Please feel free to contact us when you need assistance. 【Material Shapes Suitable for Lithium-Ion Batteries】 ■ It is necessary to have material shapes that consider electrode properties. ■ Particle size, shape, and packing density. ■ Polycrystalline and single-particle types: issues related to internal voids, cracking, edge surfaces, and basal surfaces, etc. *For more details, please download the PDF or feel free to contact us.

Our company is engaged in the development of hybrid solid electrolytes through compounding. The hybrid solid electrolytes, which combine polymers and inorganic solid electrolytes (such as sulfide and oxide types), are highly anticipated as functional materials that possess the advantages of both organic and inorganic components. By combining various polymers and inorganic solid electrolytes, we aim to develop hybrid solid electrolytes with high performance. 【Features of Hybrid Solid Electrolyte Membranes】 ■ High ionic conductivity ■ Low interfacial resistance ■ High mechanical strength *For more details, please download the PDF or feel free to contact us.