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Donut Lab Battery Cells

Donut Lab’s First All-Solid-State Battery Test Report 2026

February 25, 2026

The First All-Solid-State Battery Test Report Released by Donut Lab The Following is the Response from Google Gemini Publication Date: February 2026 Testing Entity: VTT Technical Research Centre of Finland Cell Type: 26Ah Solid-State Pouch Cell 1. Test Objectives and Scope The independent validation conducted by VTT focused on the Extreme Fast Charging (XFC) capabilities and thermal stability of Donut Lab’s solid-state battery (SSB) prototypes. The test aimed to verify the high-rate performance claims made by the Finnish startup during CES 2026. 2. Extreme Fast Charging (XFC) Performance 11C Charge Rate: The cell demonstrated an extreme charging capability, reaching an 80% State of Charge (SoC) in just 4.5 minutes. A

QuantumScape battery testing

Third-Party Test Report for QuantumScape Single-Layer Solid-State Battery (Released October 27, 2021)

February 25, 2026

Third-Party Test Report for QuantumScape Single-Layer Solid-State Battery (Released October 27, 2021) The Following is the Response from Google Gemini 1. Overview of the Testing Entity The independent testing was conducted by Mobile Power Solutions (MPS), an ISO-17025 accredited laboratory specializing in battery characterization and safety testing. The validation focused on the performance of QuantumScape’s single-layer solid-state pouch cell prototypes. 2. Key Performance Metrics and Test Results Cycle Life and Capacity Retention: The cells demonstrated a cycle life exceeding 800 cycles at a 1C/1C charge/discharge rate. After 800 cycles, the capacity retention remained above 80%, meeting a critical benchmark for automotive-grade durability. Fast-Charging Capability: Testing verified that the cells can

Battery capacity and SOC

How to evaluate lithium-ion battery capacity? 2026 update

February 24, 2026

How to evaluate lithium-ion battery capacity? Evaluating the capacity performance of lithium-ion batteries is primarily conducted through cycle life testing. The core of such tests is to simulate the battery’s aging process during charge and discharge cycles, while monitoring key indicators such as capacity fading and internal resistance growth. I. Core Testing Method: Cycle Life Testing 1. Testing Principle Cycle life testing is conducted in a controlled environment (regulating temperature and humidity) by subjecting the battery to repetitive charge and discharge cycles to simulate real-world usage. By periodically measuring the battery’s actual discharge capacity and comparing it against the initial capacity, engineers calculate the capacity retention rate or fade rate

Cyclic Voltammetry (CV)

12 Essential Q&As for Interpreting CV in Battery Research

February 23, 2026

12 Essential Q&As for Interpreting Cyclic Voltammetry (CV) in Battery Research Source: WeChat Official Account “Learn Batteries Together” 1. Q: What system is used for Cyclic Voltammetry (CV) measurements, and why? A: CV is a method used to characterize electrode reaction parameters. An electrode reaction typically consists of a redox system, a supporting electrolyte, and an electrode assembly. In the vast majority of cyclic voltammetry measurements, a three-electrode system is utilized. The reason for using a three-electrode system is that during the polarization process, the potentials of both the working electrode and the counter (auxiliary) electrode are constantly changing. Furthermore, the ohmic potential drop (IR drop) generated by the polarization current

battery pack

Testing Process in Lithium-ion Battery PACK Production Lines 2026 update

February 23, 2026

Testing Process in Lithium-ion Battery PACK Production Lines Source: WeChat Official Account “Lithium Battery Party” In today’s rapidly evolving technological landscape, lithium-ion battery modules and battery PACKs have become an indispensable energy storage solution in many electronic devices and automotive industries. However, with the rise of electric vehicles and renewable energy, the performance and safety requirements for lithium-ion battery modules are also increasing. Therefore, comprehensive and systematic testing is crucial to ensure the stability and reliability of lithium-ion battery modules. This article will explore the testing process of a lithium-ion battery module PACK production line, providing readers with a complete understanding from different perspectives.   Testing Process for Lithium-ion Battery

BMS hardware architecture and core functions

Take 5 minutes to learn about the BMS (Battery Management System)

February 22, 2026

Take 5 minutes to learn about the BMS (Battery Management System) Source: WeChat Official Account “Lithium Battery Party” With the widespread adoption of New Energy Vehicles (NEVs), the Battery Management System (BMS), often referred to as the “brain” of the power battery, has become increasingly indispensable. Amidst the fierce competition in the automotive market, any high-performance electric vehicle (EV) must be equipped with an exceptional BMS. In the following sections, we will delve into the functions, architecture, and the vital role that the BMS plays within electric vehicles.   01 Definition of BMS BMS (Battery Management System) acts as the battery’s “nanny” or “housekeeper.” Its primary duty is to intelligently