Graphite Heat Spreaders for EV Battery Thermal Dissipation

Battery module and pack that protects cells from thermal and mechanical stresses through a novel pressure management system. The module comprises a cell assembly with strategically positioned pressure-activated compression pads between cells, a pressure source, and a thermal management system. The compression pads apply consistent pressure across the cell assembly in response to external pressure changes, while the pressure source maintains a controlled pressure environment. This pressure management system enables reliable thermal management and mechanical protection of cells, particularly in high-capacity battery applications where thermal expansion and contraction are significant factors.

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A heat dissipation battery module that efficiently manages thermal dissipation across multiple battery cells through a network of interconnected heat channels. The module features a graphite sheet with strategically placed copper layers, strategically arranged through-holes, and a second copper layer on the inner wall of the holes. This multi-layered design creates a complex heat dissipation network that enables uniform heat dissipation across the battery pack while maintaining high thermal efficiency and safety.

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Electrical energy storage device with integrated temperature control cells that enhance performance and safety through phase change material (PCM) storage. The device comprises conventional battery cells arranged within modules, with temperature control cells specifically designed to incorporate PCM-filled shells. These temperature control cells enable temperature regulation through phase transition, providing a comprehensive temperature control system for the storage device.

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Early thermal monitoring of lithium-ion batteries through targeted gas injection into the liquid electrolyte. The tracer gas selectively targets specific thermal pathways within the battery, enabling precise location and timing of thermal events before they propagate. This targeted monitoring approach eliminates the limitations of traditional temperature sensors and enables early detection of thermal runaway conditions, enabling prompt intervention to prevent catastrophic failures.

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Metallic thermal interface materials (TIMs) with phase transition temperatures between 60°C and 90°C enable high-performance heat transfer between solid surfaces. These materials, comprising eutectic and non-eutectic mixtures of Bismuth, Indium, Tin, and Gallium, exhibit low thermal resistance across solid-solid interfaces. The phase transition enables efficient heat transfer across a wide temperature range, particularly beneficial for applications requiring high power density and moderate temperature gradients.

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Battery module with integrated heat dissipation and thermal management capabilities. The module features a heat management system that simultaneously dissipates heat generated by battery cells and prevents heat transfer between adjacent cells during thermal runaway. The system comprises a heat management complex with both functions, comprising a vacuum-insulated plate with a flame-retardant material laminated on one surface, and an insulating composite with a vacuum space. This integrated design enables both heat dissipation and thermal management functions, eliminating the need for separate components.

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Battery cell for electric vehicles featuring direct thermal interface between active components and coolant channels. The cell comprises separate thermal and electrical interfaces, with the thermal interface strategically positioned to facilitate efficient heat transfer between the cell components. This design enables precise control over temperature management without compromising electrical performance, allowing for optimized battery operation.

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Energy storage battery with integrated heat management system that enables flexible heat dissipation based on battery state. The battery consists of closely packed cells arranged within a shell, with a unique annular heat dissipation fin assembly integrated into the shell's outer surface. The fin assemblies are strategically deployed between the cell packs to create a continuous heat dissipation path. A deformation mechanism between the fin assemblies and the shell enables independent control of heat dissipation between cell packs, allowing the battery to adapt to changing operating conditions.

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Battery assembly and thermal management system for electric vehicles that provides efficient heat dissipation and preheating using graphite sheets inserted between the battery cells. The graphite sheets contact the cells and can be heated by current to preheat them when cold. They also conduct heat from the cells to external heat sinks for dissipation. This allows quick and efficient heat management without additional components compared to conventional methods. A temperature sensor monitors cell temperature and a power supply controls graphite sheet heating based on setpoints.

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Battery module with improved heat dissipation performance through a novel thermal management system. The module comprises a battery cell stack with a buffer pad interposed between cells, a heat transfer layer in contact with the buffer pad, and a cooling device connected to the heat transfer layer. The buffer pad is formed with a thermal conductive material, and the heat transfer layer is in a semi-solid state. The cooling device absorbs heat from the heat transfer layer, while maintaining a temperature difference of 0.12°C or less between the cooling device and the battery cell. The buffer pad thickness is controlled between 0.3 mm and 1 mm, ensuring uniform heat transfer properties.

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Composite material with integrated heat insulation and heat dissipation functions that enables simultaneous operation of thermal management in electronic devices. The composite integrates a vacuum-insulated core with a phase-change material (PCM) that can be in a vacuum state, enabling both insulation and heat dissipation while maintaining optimal thermal performance. The composite is manufactured through a novel manufacturing process where the vacuum-insulated core is integrated with a PCM-filled outer shell, with the PCM maintaining its vacuum state during manufacturing. This design enables the composite to achieve both insulation and heat dissipation simultaneously while maintaining optimal thermal performance.

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Thermal management system for electronic devices and battery management systems that utilizes phase change materials as a full replacement for traditional cooling solutions. The system employs a phase change material composite structure that can absorb and dissipate significant amounts of heat during normal operation, while maintaining a temperature below a predetermined threshold during thermal runaway events. The phase change material is encapsulated in a flame-retardant foam structure, which provides both thermal insulation and fire protection. The system can be integrated into devices and battery management systems to provide independent thermal management capabilities, eliminating the need for active cooling solutions.

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Battery module with integrated thermal barrier to prevent cell-to-cell heat transfer during thermal runaway events. The module features a heat-resistant mica layer sandwiched between a mechanically rigid layer and a separator, providing localized thermal protection between adjacent cells. The mica layer has a thickness of 0.2-3 mm, while the mechanically rigid layer has a thickness of 0.1-1 mm. The mica layer is laminated to the separator, and the mechanically rigid layer is integrated with the separator. The heat-resistant mica layer prevents heat migration between cells while maintaining structural integrity, ensuring rapid cell-to-cell thermal isolation during thermal runaway events.

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Silicone sponge pad for battery thermal runaway delay in electric vehicle batteries. The pad contains a flame retardant filler and a platinum-based flame retardant, where the platinum-based flame retardant is formed through a carbonization process that creates a thermal barrier. The pad maintains its thermal insulation properties even at high temperatures, effectively delaying the thermal runaway propagation between adjacent battery cells.

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A cooling system for lithium-ion batteries that enables safe operation without excessive weight, volume, or complexity. The system employs a graphene-based heat spreader element that rapidly transfers heat from the battery surface to a cooling mechanism, eliminating the need for conventional cooling systems. The spreader element is integrated into the battery cell design and features a high thermal conductivity to facilitate efficient heat transfer. This design enables safe operation of lithium-ion batteries in extreme temperatures without compromising their service life or safety.

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Battery cell module with a graphite heat dissipation unit featuring a heat transfer path patterned by the graphite material. The module comprises a plurality of battery cells and a heat dissipation unit comprising a graphite material with a heat transfer path patterned by the graphite material.

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Battery module with integrated liquid-cooled plates and graphite sheets for enhanced thermal management. The module features a battery cell assembly with integrated liquid-cooled plates and graphite sheets, where the graphite sheets are attached to the outside of the battery and the liquid-cooled plates are integrated into the battery casing. This configuration enables improved temperature uniformity across the battery cells while maintaining efficient heat transfer between the plates and the battery. The graphite sheets provide thermal insulation between the battery cells, while the liquid-cooled plates facilitate efficient heat dissipation through the battery casing.

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Battery pack with integrated heat management through a novel zigzag separator design. The pack comprises a battery module containing multiple battery cells, with a zigzag separator strategically placed on the battery cell sides. This separator creates channels through which a fluid can flow directly between adjacent cells, facilitating efficient heat dissipation through direct contact between the cell interfaces. The zigzag design enables optimized heat transfer while maintaining structural integrity, enabling the battery pack to operate within its normal operating temperature range.

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Battery module that prevents flame propagation through a novel heat management system. The module comprises a battery cell stack with a heat dissipation plate that radiates heat to the outside environment. The stack includes a first blocking member that provides thermal insulation between the battery cells, and a second blocking member that surrounds the first member on both sides. The battery cells are arranged in the blocking members, with the second blocking member exposed to the outside environment. A heat transfer medium is integrated into the system to facilitate heat dissipation. The module is designed to prevent the spread of flame from one cell to adjacent cells through the heat dissipation plate.

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A power battery cooling system for electric vehicles that improves efficiency by using a balanced heat exchanger between adjacent cooling plates. The system comprises two sets of cooling plates, each with a distributed cooling liquid pipeline system, with an additional heat exchanger between the plates. A cooling plate is positioned between battery installation areas, and the system includes a one-way heat conducting structure and a heat storage body within the assembly cavity. This configuration enables the system to efficiently dissipate heat generated by the battery while maintaining stable temperature across the battery cell pack.

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