Self Healing Electrodes for Electric Vehicle Batteries

Battery system and vehicle technology field The battery system is the most important component in a vehicle. For example, the battery is the most important component in the power system of a new energy electric vehicle, and it is very important to ensure the safety of the power battery system. At this stage, the requirements for battery power are also getting higher and higher, and higher requirements are put forward for the safety, reliability and consistency of the battery, especially the thermal runaway protection of the battery system has become one of the key technologies for the development of the industry. However, when the battery core inside the battery system is thermally runaway, the external high-voltage power supply will be disconnected immediately. At this time, if the vehicle is in a driving state, it will immediately lose power, which brings huge risks to the life and property safety of the driver and passengers, and there is poor safety. Utility Model Content As described in the background art, the vehicles in the related art have the problem of poor safety. The inventors have found that the reason for this problem is that after the battery management system detects that the battery cell has thermal runaway, the battery disconnector is controlled to disconnect the battery's external series circuit. At this time, the driving force

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A battery preparation device and method that enhances thermal safety and high temperature tolerance of lithium-ion batteries through the use of biomimetic repair materials and specialized current collector components. The device integrates biomimetic repair materials, high-temperature-resistant materials, thermal safety protection materials, and polymer materials into a single current collector assembly. This biomimetic repair material enables the creation of a composite current collector with enhanced thermal safety properties, while the high-temperature-resistant materials and polymer components maintain the battery's thermal stability during operation. The assembly is then used to prepare lithium-ion batteries with improved thermal safety and high temperature tolerance, reducing the risk of thermal runaway and battery degradation.

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Battery cell, battery, and electrical device that enables controlled electrolyte replenishment through a novel sealing mechanism. The cell incorporates a detachable sealing structure with integrated injection channels that can be opened and closed through rotation, allowing precise control over electrolyte replenishment during manufacturing and service. The sealing structure features a specially designed flow passage that enables regular electrolyte replenishment while maintaining battery performance and safety.

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Self-healing battery electrodes system that autonomously repairs electrode damage through microcapsule-based healing mechanisms. The system comprises microcapsules containing healing agents that release upon detecting electrode cracks, restoring structural integrity through self-repair. The healing process is triggered by environmental stimuli such as temperature, light, and electrical signals. This system enables lithium-ion batteries to maintain their performance and lifespan through intrinsic self-repair capabilities, reducing the need for external maintenance and replacement.

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Composite-coated lithium-ion battery cathode material for enhanced electrochemical performance. The material comprises a positive electrode core coated with a uniform, conductive polymer-inorganic oxide composite layer. The inorganic oxide is distributed in dot form on the electrode surface, while the polymer matrix provides structural integrity. This composite layer enables complete surface coverage, suppresses interface reactions, and ensures efficient electron and ion transport through the battery.

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Self-protecting electric vehicle battery system that automatically short-circuits damaged battery modules during impacts. The system comprises multiple detection units positioned at the bottom of each battery module and inside the battery case, and short-circuit devices strategically positioned outside each battery module. When a module is damaged due to impact, the system generates a specific signal that triggers the short-circuiting of the damaged module while maintaining power supply to the undamaged modules.

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Thermal runaway warning system for secondary batteries that accurately detects internal electrode assembly anomalies by integrating temperature and expansion force measurements. The system monitors the internal temperature of the battery core and the expansion force of the electrode assembly through advanced sensors that can penetrate the battery casing. This integrated measurement approach enables precise detection of thermal runaway conditions within the battery, particularly when traditional surface-based sensors are insufficient due to electrode thickness or sensor placement limitations.

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Conductive polymer/metal oxide electrode surface modification material and preparation method for lithium-ion batteries. The material comprises metal oxide nanoparticles coated with a polymer-metal complex layer that accounts for 0.1% to 20% of the total mass. The metal oxide nanoparticles are specifically chosen from Al2O3, ZrO2, MgO, or TiO2. The polymer-metal complex layer is formed through the complexation of a polymer containing electron-donating groups with metal ions. This layer enhances the electrode's conductivity while maintaining its structural integrity. The preparation method involves the controlled deposition of the polymer-metal complex layer onto the metal oxide surface, ensuring precise control over the layer thickness and composition.

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A sulfur-based positive electrode binder for lithium-sulfur batteries that enables high-performance cathodes through cross-linked polymerization. The binder combines guar gum, xanthan gum, and conductive polymer (PEDOT:PSS) in a 1:1:1 mass ratio, with guar gum providing 30-70% of the total mass. The cross-linked polymer network is formed through thermal treatment at 150-200°C for 3-8 hours, resulting in a three-dimensional network structure that effectively buffers sulfur particle expansion and improves lithium polysulfide shuttle efficiency.

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Power battery system and electric vehicle design to prevent thermal runaway and heat spread in the battery pack. The system incorporates a novel thermal management architecture that integrates multiple thermal management layers, including a high-temperature thermal interface material (TIM), a thermal management system (TMS) with advanced thermal protection features, and a battery management system (BMS) with enhanced thermal monitoring capabilities. This multi-layered approach enables proactive thermal management through coordinated control of temperature and electrical parameters, preventing thermal runaway and heat spread in the battery pack.

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Organic coating layer for lithium-ion battery electrodes that enables self-healing properties through enhanced lithium conductivity and mechanical resilience. The coating layer is prepared through a polymerization process involving acrylate monomers, silicone precursors, and lithium salts, with specific conditions tailored to achieve superior conductivity and mechanical properties. The coating layer is then applied to the electrode surface, forming a durable and flexible barrier that protects the electrode from degradation during charge/discharge cycles. The coating layer's unique properties enable rapid self-repair at room temperature and thermal conditions, significantly improving battery performance and safety.

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Battery with enhanced liquid management through a novel sealing mechanism that prevents liquid leakage while maintaining electrical isolation between cells. The battery features a partitioned cell structure with a liquid guide hole and air guide hole, where the partition separates the cell compartments. The sealing mechanism switches between open and closed states, controlling the flow of liquid between adjacent cells. This design ensures precise control over liquid distribution while maintaining electrical integrity, enabling higher power density packaging in vehicles.

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Battery design improves internal resistance management by incorporating a novel sealing mechanism that prevents electrolyte leakage between adjacent battery cells. The mechanism, comprising a heat-activated protrusion on the separator plate, seals the cell junction when the injection port is completed, preventing electrolyte migration. This design addresses the conventional problem of internal resistance through cell-to-cell leakage while maintaining the structural integrity of the battery pack.

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Battery design for electric vehicles that enhances capacity while minimizing internal resistance. The design features individual cavities within the battery casing, each containing a separate cell. A specialized isolation membrane with strategically positioned injection channels enables precise liquid distribution between cells without compromising internal cell isolation. This innovative approach enables higher capacity batteries while maintaining the necessary isolation between adjacent cells, eliminating the traditional parallel-connection approach that increases overall weight and space requirements.

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Multifunctional self-healing binder for lithium-sulfur battery positive electrodes that combines enhanced mechanical strength, toughness, and polysulfide inhibition properties. The binder, comprising a cross-linked network of water-soluble polymers, provides superior interface stability and charge/discharge performance in sulfur cathodes. The binder's hydrolysis in water enables uniform dispersion between sulfur active material and conductive agent, while its self-healing mechanism addresses the shuttle effect through polysulfide capture. This multifunctional binder enables lithium-sulfur battery performance improvements by addressing critical challenges such as volume expansion, polysulfide dissolution, and interface degradation.

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Self-repairing lithium-sulfur battery positive pole piece for lithium-ion batteries that incorporates a novel self-healing adhesive. The adhesive contains disulfide/polysulfide bonds that can heal themselves upon exposure to sulfuric acid, enabling rapid repair of damaged electrode structures during charging and discharging cycles. This self-repair mechanism is integrated into the adhesive formulation, allowing the battery positive pole piece to maintain its structural integrity while maintaining charge/discharge performance.

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Battery design for electric vehicles that minimizes internal resistance and heat generation while achieving high voltage capacity. The battery comprises a housing and a cell assembly within the housing, with each cell comprising multiple pole groups connected in series. The cell assembly includes a partition that divides the housing into multiple compartments, each compartment containing a pole group. A sealed liquid injection channel is integrated into the isolation membrane and partition, ensuring complete separation between compartments while maintaining electrical isolation. This design enables efficient power distribution while maintaining the required voltage and minimizing external connectors.

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Battery system and electric vehicle that prevent soft pack battery overcharging through a novel configuration. The system comprises a series loop containing a soft pack battery and a first single battery connected in series with the soft pack battery. An additional current interrupting device is integrated into the first single battery. This configuration enables the system to automatically detect and interrupt overcharging currents in the series loop, protecting the soft pack battery from damage.

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Battery pole piece with self-repairing effect that enhances lithium-ion battery lifespan through enhanced water management. The pole piece incorporates a specific water-based healing agent, conductive agent, and fiber strengthening agent into its slurry formulation. This integrated solution enables the pole piece to self-repair through enhanced water absorption and ion exchange, significantly improving its cycle life compared to conventional battery pole pieces.

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Battery system and electric vehicle that prevent series circuit failure due to abnormal current interruption. The system comprises a series loop with multiple battery packs connected in parallel, each containing two identical battery cells. A single cell in the series loop has a current interruption device that can be triggered by abnormal conditions. The system ensures that the interruption device only activates when the cell is in a normal state, preventing unintended circuit disconnection.

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