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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