Graphite Heat Spreaders for EV Battery Thermal Dissipation

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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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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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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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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Battery cooling plate for electric vehicles that improves heat management by strategically integrating heat dissipation and storage within the battery pack. The plate features a main board body with an assembly cavity between each battery cell and coolant pipeline. A unidirectional heat conducting structure is positioned near the battery cells, while a heat storage body is placed near the coolant lines. This configuration enables efficient heat transfer from battery cells to the coolant system through the assembly cavity, while the heat storage body facilitates controlled release of heat to the coolant system through a gap.

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A high-power battery pack that achieves efficient heat dissipation through a novel graphite-based thermal management system. The pack incorporates a thermally-conductive graphite material that is strategically bonded in the middle of each cell in the battery pack. This graphite material is positioned between the outer cell surfaces and the inner housing wall, providing direct thermal contact while preventing cell-to-housing contact. This configuration enables effective heat dissipation while maintaining cell-to-housing contact, ensuring reliable operation and preventing overheating that can compromise battery performance.

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A novel thermal management structure for lithium-ion batteries in electric vehicles that enhances heat dissipation through a unique interlocking design. The structure comprises a battery housing with a graphite heat sink integrated into the casing, surrounded by an aluminum plate. The aluminum plate features strategically positioned thermally conductive particles and channels, while the graphite heat sink incorporates a card slot and sliding mechanism. The interlocking design enables the aluminum plate to be positioned within the graphite heat sink's channels, creating a continuous thermal pathway for efficient heat dissipation. This innovative configuration addresses common battery thermal management challenges by leveraging both the graphite heat sink's thermal properties and the aluminum plate's structural integrity.

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Battery pack that optimizes temperature distribution by strategically positioning a high-thermal-conductivity heat storage cell within the battery cells. The pack comprises a housing, battery cells of uniform size and shape, and a heat storage cell that matches the cell dimensions. The heat storage cell is positioned between the battery cells, and a high-thermal-conductivity interconnect system connects it to the battery cells. This design enables efficient heat dissipation while maintaining uniform temperature across the battery cells.

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A heat conductive heat-expandable member for preventing thermal runaway in lithium-ion batteries while enhancing heat dissipation during normal operation. The member comprises a thermally conductive filler, a thermally expandable material, and a silicone resin. The member has a thermal conductivity of 1 W/m·K or higher at -30°C to 80°C, expands above 80°C, and has a flame retardancy of V-1 or higher according to UL94 standards. The member is cured to form a heat-conductive, heat-expanding structure that can be integrated into battery cells or used as a standalone component.

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Battery module with improved thermal management through a novel heat distribution system. The module comprises a battery assembly with a heat conduction surface and a heat equalizing plate assembly. The plate assembly features a heat equalizing portion in thermal contact with the heat conduction surface and a heat conducting portion located on the top surface of the battery assembly. The heat conducting portion is strategically positioned to minimize volume requirements while achieving uniform heat distribution across the battery assembly. The plate assembly enables efficient heat transfer between the battery assembly and external sources or cold sinks, thereby maintaining stable battery temperatures while minimizing module volume.

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Graphite sheet-based power battery pack heat dissipation structure for new energy vehicles that eliminates the need for external water-cooled plates while maintaining superior thermal management. The structure comprises a cold end graphite sheet attached to the battery pack shell, with a hot end graphite sheet group featuring a cell enclosure, receiving section, and connecting section. The cold end sheet provides direct thermal interface with the battery core, while the connecting section connects to the inner shell wall. The enclosure section surrounds the outer edge of the battery cells, with the receiving section positioned between the cell enclosure and connecting section. This configuration enables efficient heat dissipation through the graphite sheets, eliminating the need for conventional water-cooled plates while maintaining the same level of thermal management performance.

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A composite cooling system for electric vehicle batteries that provides uniform heat dissipation to prevent overheating and improve battery life. The system uses an internal liquid cooling loop connected to the battery pack at both ends. A separate external liquid cooling system circulates coolant through the battery pack. The internal loop provides localized cooling while the external loop provides overall cooling. This prevents hot spots and ensures uniform temperature throughout the battery pack.

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Power battery for electric vehicles with enhanced thermal management. The battery design incorporates strategically positioned heat dissipating elements to optimize heat transfer between the battery's thermal management system and the vehicle's cooling system. This arrangement enables efficient heat dissipation during charging and discharging, while maintaining the battery's operating temperature within safe limits. The battery's thermal management system is specifically engineered to match the heat transfer characteristics of the vehicle's cooling system, ensuring a consistent and reliable thermal environment for the battery cells.

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Battery thermal management device with improved temperature uniformity through a novel heat pipe and phase change material arrangement. The device features a soaking bottom plate with integrated heat exchange elements, where each element is connected to a heat pipe that extends through a phase change material matrix. The phase change material fills the gaps between batteries and the box walls, creating a uniform thermal interface. The heat pipes are strategically positioned to ensure efficient heat transfer between the bottom plate and the surrounding battery array. This configuration enables consistent temperature distribution across the battery pack, particularly in applications where natural cooling is insufficient or air cooling is impractical.

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Vehicle battery pack with enhanced thermal management. The pack features a heat transfer member with a multi-surface heat transfer structure that includes an unevenly shaped heat transfer portion with multiple surfaces. This heat transfer member is mounted in a vertical orientation within the battery pack, with each battery in direct contact with the heat transfer member's upper surface. The heat transfer member is arranged in a longitudinal configuration with multiple contact points that are positioned in a row on the battery's bottom surface. This arrangement enables efficient heat transfer between the heat transfer member and the battery cells.

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Thermal management system for battery modules that maintains charge and discharge capacity even in low-temperature environments. The system integrates a heating element and a heat-conduction element between adjacent battery modules, with the heating element controlling temperature between predetermined thresholds. The system enables continuous operation of the battery module at lower temperatures while preventing charge and discharge degradation, and extends its lifespan through controlled temperature management.

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Battery module and thermal management system that maintains charge and discharge capacity in low-temperature environments while preventing dendrite formation. The module comprises a heating element integrated into the battery cells, with matching heat-conductive sleeves that connect to the cells. The heating element is controlled to activate when the cell temperature falls below a predetermined threshold, while maintaining continuous heat transfer to the sleeves. This configuration prevents the formation of dendrites that can compromise cell performance, while ensuring stable operation in low-temperature conditions.

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A self-adjusting heat dissipation system for electric vehicle batteries that optimizes thermal management through active cooling. The system incorporates a network of heat pipes and fins that dynamically adjust their configuration in response to temperature changes, enabling real-time temperature control and enhanced battery lifespan. The system integrates with the vehicle's power electronics to provide precise thermal management, enabling electric vehicles to maintain optimal operating temperatures while minimizing battery degradation.

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Thermal management system for lithium-ion batteries that enables efficient temperature regulation through a heat pipe and phase change material combination. The system utilizes a heat pipe to transfer generated heat from the battery to a phase change material reservoir, where it is stored and then transferred back to the battery through the heat pipe. This phase change material reservoir maintains a stable temperature range, ensuring consistent battery performance even at low temperatures. The system eliminates the need for separate cooling systems and phase change material components, while maintaining reliability, safety, and flexibility.

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A hybrid battery pack cooling/heating system for electric vehicles that combines liquid cooling and heating through indirect contact. The system uses a specially designed liquid heat exchanger that enables efficient heat transfer between the battery and a heat sink, while maintaining a consistent temperature across the battery pack. This approach eliminates the need for traditional air cooling systems and provides a reliable, reliable cooling/heating solution that maintains uniform temperature distribution throughout the battery pack.

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A battery assembly that achieves both high thermal management and compact design through optimized thermal interface structures. The assembly comprises a battery module with multiple cells, a heat-conductive plate, and positioning components. The plate and positioning components are connected through thermally conductive films that interconnect the plate with the cells. This configuration enables efficient heat dissipation through the plate while maintaining cell-to-cell contact, while the positioning components provide precise cell placement. The plate and positioning components are connected through boundary and intermediate thermal interfaces, respectively, to achieve uniform heat distribution across the module.

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A potting and radiating apparatus for battery cooling that simplifies and improves battery thermal management. The apparatus comprises a thermally conductive potting compound encapsulating multiple battery cells, with a heat-conductive tube extending from the cell to connect with the heat sink plate. The tube's end is positioned on the cell's side, while the other end extends through the potting compound to transfer heat from the cell to the heat sink. This design enables efficient heat transfer between the battery cells and the heat sink, while maintaining a uniform cooling environment.

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Thermal management system for battery modules that enables effective temperature regulation across a wide operating temperature range. The system incorporates a heat transfer element, such as a heat pipe, between the battery module and a heat sink. The heat pipe, which uses evaporative cooling, rapidly transfers heat between the high-temperature battery module and the lower-temperature heat sink. This enables efficient temperature management in both hot and cold operating conditions, particularly in applications where battery life is critical.

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A battery support plate and module that enables reliable cell mounting through a thermal interface while maintaining optimal cell operation. The plate features multiple heat-generating ports that connect to a power source, creating a controlled thermal environment for the cells. This design enables the cells to reach normal operating temperatures even in cold conditions, while the plate provides structural support for the module. The thermal interface between the ports and the cell mounting interface enables efficient heat transfer.

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Thermal management system for electric vehicle battery packs that improves battery life and efficiency by actively cooling the battery pack to maintain optimal operating temperatures. The system uses a cooling frame with integrated heat transfer sheets between each row of batteries. Refrigerant-filled brass fins are attached to the heat transfer sheets to allow air conditioning or heating of the battery pack. This provides direct cooling of the batteries to prevent overheating and prolong their life.

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Thermal management system for battery packs that improves cooling of high-power, high-capacity lithium-ion pouch cells used in PHEVs. The system uses a composite cooling plate with a thermal pyrolytic graphite (TPG) heat spreader. The TPG spreader is sandwiched between an aluminum base plate and the battery cell. It rapidly conducts, spreads, and dissipates cell heat to the cooling medium. This improves cell temperature uniformity, reduces max cell temp, and max differential temp, improving battery durability.

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Preventing thermal runaway propagation in batteries to avoid chain reactions and catastrophic failures. The technique involves using thermal conductors, insulators, and spacers to distribute heat away from failed cells and isolate them from surrounding cells. The battery has alternating rows of cells with insulators between them to prevent direct contact. Column buses made of high-melting-point materials extend vertically from each row. The buses have flanges that contact the cells. This configuration slows heat transfer from failed cells to the buses and between buses and surrounding cells. It allows the failed cell to reach high temperatures without propagating to others.

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A battery pack field specifically designed to enhance temperature control while maintaining safety in small battery packs. The solution employs a compact heating system that integrates into the battery cell packaging, eliminating the need for separate heating elements. This integrated design enables precise temperature management while minimizing the overall footprint of the heating system. The heating system ensures reliable temperature regulation in the battery cell, addressing common concerns associated with traditional heating solutions that occupy significant space.

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A method for improving lithium-ion battery performance through enhanced thermal management. The method involves integrating a heat exchanger into the battery case, specifically within the battery body and the cooling plate, to enhance heat dissipation. This integrated heat exchanger system enables more efficient cooling of the battery pack by utilizing the natural convection of air flowing through the battery components. The system addresses the thermal management challenges associated with lithium-ion batteries, particularly in high-capacity applications, by providing a comprehensive solution for both cooling and heat management.

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