EV Battery Pack Engineering for Vehicle Integration

Securing electronics modules within a traction battery pack assembly by suspending them from the enclosure cover. The battery pack has an enclosure with a removable cover. An electronics support plate is secured to the cover using brackets and fasteners. The electronics modules are mounted on the support plate. This allows the modules to be easily accessed and serviced by removing the cover, without having to disconnect wiring harnesses and other connections.

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An electrical energy storage system for electric vehicles that provides improved safety and space efficiency compared to conventional battery packs. The system uses a separate lower housing part that can be detached for servicing without removing the upper housing with the batteries. The lower part is attached to the vehicle body, while the upper part with the batteries is fixed to the body. This allows access to the batteries without removing them from the vehicle. The lower part also contains coolant ducts to cool the batteries, and intercell structures that connect the batteries and transmit forces to prevent damage in crashes. Degassing ducts in the battery compartment prevent thermal propagation by allowing vented gases to exit when a cell fails.

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Reducing cracking in pouch-type secondary battery cells by forming the inner walls of the pouch at an inclined angle during manufacturing. This prevents high elongation rates that can cause cracks when vertical walls are formed. The pouch forming apparatus has dies with forming grooves with vertical and inclined spaces, and punches with blocks that insert into these spaces. This allows forming pouch accommodation grooves with inclined inner walls. The angle of the inclined blocks can be changed via detachable coupling to vary the pouch inner wall angle.

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Vehicle lower structure design to protect the battery from collision damage. The structure includes a front suspension member, a lower arm supported by the suspension member, and a battery case on the rear side of the suspension member. The battery case has a front plate and a frame extending below it. A block is attached to the front of the frame behind the lower arm to prevent the arm from contacting the battery in a collision.

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A vehicle base structure with a battery unit that can move further in a side impact to absorb more crash energy. The battery is sandwiched between structural members on each side. The bracket connecting the battery case to the inner wall of one member has an angled section that extends inward. When a side impact pushes the battery toward the other member, the angled section deforms, generating moment that causes the battery to move further outward and downward. This longer movement path absorbs more crash energy compared to just moving horizontally.

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Solid-state batteries (SSBs) represent a highly promising solution for the next generation of energy storage systems, offering high density, superior safety performance, and prolonged service life. The development solid-state electrolyte (SSE) materials is particularly critical, as their ionic conductivity interface stability directly determine overall performance batteries. Therefore, we focus on application in new vehicle This paper adopts method literature reading analytical research to review cutting-edge progress various field batteries, revealing key potential improving cycle study concludes that SSEs, including those with carbon nanomaterials, rare earth bromides, composite structures, significantly enhance safety, life However, further needed address challenges like silicon anode volume expansion lithium dendrite suppression, while future efforts should materials, optimization, cost-effective manufacturing, interdisciplinary collaboration accelerate battery commercialization sustainable sector.

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ABSTRACT Batteryelectric vehicles (EVs) are growing exponentially. The demand for these batteries is expected to increase sevenfold by 2035. EV reach their end of life when the capacity fades 70%80% new, with some being removed from primary applications even lower levels degradation. These can be used in less demanding applications. disassembly process currently manual, slow, unsafe, and expensive. Automation needed throughput. battery packs feature various continually changing designs form factors, which limit usefulness deterministically programmed robotic solutions. conceptual has attracted attention researchers. However, while many approaches have been proposed, practical implementations lacking. We review proposed concepts describe selected approach, elements partial solutions validated a laboratory setting, including selection commercial solutions, development custom effectors, methodologies detection, localization, classification fasteners. computer vision tasks employed an overhead 2D camera detect type pack approximate localization fasteners, 3D mounted on arm precise ... Read More

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Battery module with improved cooling performance for applications like electric vehicles. The module has a heat sink integrated into the lower frame to directly cool the battery cells. The heat sink has a flow path for refrigerant. The flow path has longer parallel paths between the cells versus perpendicular paths. This configuration allows direct cooling of the cells with better cooling efficiency compared to indirect cooling through a separate heat sink. The integrated heat sink also improves space utilization compared to a separate heat sink.

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Battery pack design for electric vehicles that reduces fabrication time and weight compared to conventional packs. The pack has a horizontal fixing rod inserted into a tube between the battery modules to hold them in place instead of using long bolts. The rod prevents vertical movement. The pack tray has recessed grooves to press-fit and fix the rod ends. This simplifies module mounting and reduces time. The rod provides fixation without bolts. It also allows central crossbeam coupling to increase pack rigidity. The pack can be installed in vehicles.

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Method and apparatus for mounting a battery cell stack in a frame without deforming the frame. The method involves using two films, one attached to each side cover of the frame and the other attached to the battery cell stack. The cell stack and frame are then moved together, with the cell stack sliding into the frame between the films. This allows the cell stack to be mounted without distorting the frame or damaging the cells.

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Top insulator for secondary batteries with improved heat resistance, chemical resistance, and reduced dust generation during punching compared to conventional insulators. The top insulator is made by applying a silicone rubber to one or both surfaces of a glass fiber fabric. This silicone-coated glass fiber composite has better heat resistance, chemical resistance, and mechanical properties than pure glass fiber. It can withstand temperatures over 250°C, prevent short circuits at high temps, and resist electrolyte corrosion. The silicone coating also reduces dust generation during punching compared to pure glass fiber insulators.

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Battery pack design for electric vehicles that uses rigid shear plates sandwiched between the battery cells to increase stiffness and impact resistance. The shear plates are connected by non-conductive tether cables to prevent buckling during loading. This allows the battery pack to function as a structural member of the vehicle chassis.

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A lightweight, corrosion-resistant, and crush-resistant bottom sheet for battery boxes in electric and hybrid vehicles. The sheet is made of an aluminum alloy with specific composition ranges for elements like Mg, Mn, Si, Fe, Cu, Cr, Zn, and Ti. The alloy has 2.5-4.0% Mg, 0.1-0.8% Mn, 0.4% Si max, 0.5% Fe max, 0.5% Cu max, 0.1% Cr max, 0.1% Zn max, 0.1% Ti max, and rest Al. The alloy balance provides optimal properties like intrusion resistance, corrosion resistance, and stiffness for battery box bottoms.

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A battery pack design that simplifies electrical connection between the battery cells and protective circuit module. The battery pack has a frame with protruding ribs that press the cell electrode tabs and circuit module together. This tight contact allows easy laser welding between the tabs and module without a separate jig. The ribs keep the components aligned and pressed together for the welding process.

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Battery pack for electric vehicles with improved energy density and structural integrity. The battery pack has a unique design that eliminates unnecessary gaps and space losses between the battery modules and pack case. Instead, the modules themselves provide structural support and rigidity. This is done by integrating the module end plates into the module housing. The pack case is a simple tray with a top cover that seals against the tray edges. This eliminates the need for separate crash beams or gap spaces. The integrated module/pack structure provides maximum space utilization and reduces weight compared to traditional designs.

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An antenna design for electronic devices like smartphones with near-field communication (NFC) capabilities. The antenna is compact and improves NFC performance in limited device space. The design involves an antenna coil with segments on opposite sides of a winding center. A conductive element is placed opposite one segment to cancel its magnetic field. This reduces magnetic field cancellation inside the coil, improving NFC performance.

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This study investigates the structural integrity and dynamic behavior of symmetry-optimized battery pack systems for new energy vehicles through advanced finite element analysis. It examines with mechanically stable thermally adaptive potentials. Leveraging geometric symmetry principles, a high-fidelity three-dimensional (3D) model was constructed in SolidWorks 2023 subjected to symmetry-constrained static analysis on ANSYS Workbench 2021 R1 platform. The performance systematically evaluated under three critical asymmetric loading scenarios: emergency left/right turns braking conditions, particular attention symmetric stress distribution patterns. numerical results confirmed initial designs compliance mechanical requirements while revealing deformation characteristics dominant mode shapes. Building upon symmetry-enhanced topology configuration, novel lightweight strategy implemented by substituting Q235 steel ZL104 aluminum alloy. While has been widely studied, thermal gradients packs can induce expansions. For example, uneven cooling may cause localized warping alloy shells. mult... Read More

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In response to the global imperative reduce greenhouse gas emissions and fossil fuel dependency, electric vehicles (EVs) have emerged as a sustainable transportation alternative, primarily utilizing lithium-ion batteries (LIBs) due their high energy density efficiency. However, LIBs are highly sensitive temperature fluctuations, significantly affecting performance, lifespan, safety. One of most critical threats safe operation is thermal runaway (TR), an uncontrollable exothermic process that can lead catastrophic failure under abusive conditions. Moreover, propagation (TRP) rapidly spread failures across battery cells, intensifying safety threats. To address these challenges, developing advanced management systems (BTMS) essential ensure optimal control suppress TR TRP within LIB modules. This review systematically evaluates cooling strategies, including indirect liquid cooling, water mist immersion phase change material (PCM) hybrid based on latest studies published between 2020 2025. The highlights mechanisms, effectiveness, practical considerations for preventing initiation suppre... Read More

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The rapid growth of electric vehicles (EVs) has heightened the demand for battery systems that not only deliver high performance but are also efficient to maintain, scale, and recycle. While much industrys focus been on energy density cost optimization, serviceabilitydefined by ease maintenance, diagnostic accessibility, component-level replacementhas emerged as a critical yet underprioritized factor. Traditional EV packs, often monolithic tightly integrated, pose significant challenges field technicians, including prolonged disassembly times, high-voltage safety risks, limited transparency. These limitations increase downtime, escalate service costs, constrain long-term sustainability platforms. This paper explores transformative role modular pack design in improving serviceability lifecycle efficiency across ecosystems. From broader perspective, it examines how modularity facilitates streamlined maintenance workflows, safer handling procedures, standardized replacement strategies. analysis narrows compare philosophies leading OEMs such Tesla, GM, Rivian, Lucid, evaluating ... Read More

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Battery technology is an emerging research domain within the automotive sector, with a focus on various battery chemistries such as Li-ion, LiFePO4, NMC, and NaCl, well specialized cells like LiSOCl2. These are crucial in advancing electric vehicle (EV) technology. Batteries available different packaging formats, including prismatic, cylindrical, pouch designs, each tailored to diverse operational environments. This study investigates impact of these packages overall performance. Additionally, it assesses influence temperature efficiency, aiming identify optimal range for maximum A significant part focuses development efficient thermal management (BTM) systems, which designed control maintain desired range, thereby enhancing efficiency. The outcomes this provide valuable insights improving reliability efficiency EV batteries. findings ensuring performance safety across field conditions. Automotive manufacturers suppliers can leverage refine their product dependability By through improved effective management, contributes significantly advancement technology, making vehicles more reli... Read More

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