Thermal Imaging for EV Battery Temperature Detection

Intelligently managing battery temperature in a battery swap cabinet to improve safety, efficiency and prevent fires. The method uses an infrared camera to monitor battery temperatures, detects abnormal heating, identifies hot spots, and takes corrective actions like cooling and fire suppression. It also balances temperatures between modules. This provides accurate and timely temperature monitoring, prevention, and response compared to simple temperature sensors.

Source

Battery cell abnormal temperature detection system that improves stability and reduces processing compared to individual sensors per cell. It uses overlapping light guide plates and an image sensor to detect temperature anomalies in battery cells. The plates change the path of infrared radiation emitted from cells. The sensor captures reflected radiation to generate temperature maps of cell sides. If side temps are outside a range, an abnormal temperature is detected. This shared sensing reduces cell count processing while maintaining stability.

Source

Battery temperature monitoring system for electric vehicles that enables effective monitoring and management of battery temperature and placement area to prevent explosions and safety hazards. The system uses battery-mounted temperature sensors, WiFi/4G connectivity, and RFID tags to remotely monitor battery temperature, location, and associate it with vehicle details. This allows real-time monitoring and alerts when batteries get too hot, as well as tracking of parked vehicles with potential safety issues. The system uses a network of monitoring terminals in parking areas with RFID readers to identify vehicles, and a central server with mapping of router locations to correlate temperature readings with vehicle locations.

Source

An electric vehicle thermal management system that provides improved battery temperature monitoring, analysis, and fire protection compared to existing systems. The system has a temperature monitoring module to accurately measure battery temperature. It also has a temperature analysis module to model and calculate battery temperature changes. This allows predicting when temperatures become critical. The system also has a fault alarm module to warn of overheating and an automatic fire extinguisher to suppress battery fires.

Source

A lithium battery overheating protection system and method that uses thermal imaging to accurately detect and alarm lithium battery thermal runaway. The system analyzes changes in temperature areas on the battery surface to determine if thermal runaway is occurring. It involves processing battery thermal images to extract location features of high temperature areas, calculating area changes, and comparing against thresholds to trigger a thermal runaway alarm. This enables real-time monitoring and intervention to prevent catastrophic lithium battery failures.

Source

Monitoring system for secondary batteries like lithium-ion batteries in devices like vehicles and buildings to detect battery abnormalities before they cause safety issues. The monitoring uses temperature-sensitive paint applied to the battery exterior and an imaging device to capture surface temperature changes. A neural network estimates abnormal heat generation based on the temperature images. This allows early detection of localized overheating before ignition or explosion. The neural network can learn from small amounts of data to accurately predict battery abnormalities using the temperature images.

Source

A system for monitoring battery temperature in electric vehicles using thermal imaging cameras to provide predictive analysis and alerts for battery health. The system uses non-contact thermal cameras to acquire images of the battery without contact. The images are analyzed using machine learning to extract temperature variations. If the battery temperature exceeds or falls below a threshold, an alert is sent to the user. This allows monitoring of battery temperature without invasive techniques or contact sensors.

Source

Energy storage battery temperature management system, method and energy storage system that uses optical fiber temperature sensors to accurately monitor the temperature of individual battery modules in a pack. This data is then used by the energy management system to dynamically adjust the cooling system to maintain consistent temperatures across the pack. The system leverages the flexibility and accuracy of optical fiber sensors to overcome limitations of traditional temperature acquisition methods like thermocouples and infrared detectors.

Source

Dynamic monitoring of battery packs in electric vehicles to improve fault detection accuracy. The method involves using a temperature sensor array, air volume sensor array, and camera on the battery pack to collect multiple sources of data. Battery temperature is predicted based on sensor data and air volume. If temperature faults are detected, the camera is triggered to image the cooler air outlet. Image processing analyzes dust accumulation near the outlet to confirm if it's causing poor cooling. This provides more accurate fault location and root cause compared to just using temperature sensors.

Source

Early warning system for lithium battery storage stations to detect and prevent thermal runaway fires. The system uses thermal imaging cameras to monitor battery temperatures in real-time. A trained lithium battery temperature monitoring model analyzes the thermal images to determine the temperature of each heat source area. The temperature trend of each area is compared against the trend for lithium battery thermal runaway. If the trend matches, an early warning is issued and fire suppression systems are activated.

Source

Intelligent sensor for predicting internal short circuits and thermal runaway in lithium batteries by estimating temperature and heat distribution. The sensor has a temperature sensor array to measure multiple points inside the battery. It calculates battery temperature and heat generation using a model based on the sensor data. This captures abnormal hotspots from lithium dendrite formation, predicts short circuits and runaway, and provides early warning. The sensor can be attached to the battery surface or embedded inside.

Source

Battery pack thermal management system for electric vehicles that can monitor, control, and regulate battery temperature independently of the vehicle power state. The system has modules for temperature monitoring, data processing, judgment, and thermal management. It allows continuous temperature monitoring of the battery and environment during vehicle operation, compares against thresholds, generates control strategies based on alarms, judges strategies with historical data, and executes temperature adjustments to keep the battery within normal range. This improves battery life by preventing excessive temperature extremes when the vehicle is off.

Source

Detection and mitigation of thermal runaway propagation in a vehicle battery to prevent battery damage and safety hazards. The system uses sensors like gas, temperature, and infrared inside modules to detect conditions leading to thermal runaway. If thresholds are exceeded, active relays isolate the faulty module to stop propagation. The battery management system coordinates this based on sensor data. This allows proactive isolation before runaway instead of waiting for voltage/temp indicators.

Source

A system for real-time monitoring of battery pack temperatures in electric vehicles to improve safety and enable earlier intervention if issues arise. The system uses a matrix of temperature sensors directly connected to a dedicated controller, separate from the vehicle's main control system. This allows real-time monitoring and display of individual cell and pack temperatures. It also enables quicker detection of abnormalities compared to relying on processed results from the main control system. The dedicated controller can also send alarms for early warning if temperatures exceed safety thresholds. The system has a switch to control lighting indicators on the battery pack to visually indicate temperature levels.

Source

Traction battery for electric vehicles that uses IR sensors with deflection optics to provide improved temperature monitoring. The battery has IR sensors with arrayed elements that can spatially resolve temperature over surfaces. A deflection optic between the sensor and surface allows detection without contact. This allows larger battery packs with higher packing density since the optics can map a large area onto the sensor without needing large gaps. The optics are positioned outside the battery module housing with openings for IR beams to detect internal cell surfaces.

Source

Battery temperature control system for battery packs that allows individual module cooling instead of system-wide cooling. An infrared thermal imager captures pack images and distributed temperature sensors monitor module temps. A controller analyzes the images and module temps to select modules for isolation from the pack using gating circuits. This enables targeted cooling of overheating modules while the rest continue operating. It improves efficiency by avoiding system-wide cooling and enables faster thermal balance.

Source

Remote and isolated temperature sensing of electrical terminals like charging connectors without adding thermal mass or resistance. It involves applying a thin temperature-sensitive material patch to the terminal surface and sensing changes in the patch using an isolated external circuit. This allows detecting terminal temperature without contact or affecting its electrical properties. The patch has low thermal mass compared to the terminal. Techniques like photodetection or magnetic sensing can be used. The patch materials expand or lose eddy currents at higher temperatures, which can be detected remotely to determine safe operating temperatures.

Source

Battery system temperature control using a distributed gating circuit and thermal imaging to independently cool overheated battery modules in a battery pack. The method involves determining the heating area of the pack using thermal imaging, extracting real-time temperatures of modules in that area, and selectively isolating overheated modules using the gating circuit. This allows targeted cooling to balance temperatures and prevent damage.

Source

High-voltage battery temperature monitoring and automatic adjustment system for electric vehicles that can actively cool specific hot spots on the battery pack to prevent thermal runaway and improve overall pack performance. The system uses a monitoring module with flexible temperature sensors on the battery surface, a control module with a microcontroller, and an adjustment execution module with injectors. It detects hot spots, calculates the rate of temperature increase, and sends signals to the injectors to locally cool those areas. This targeted cooling prevents localized overheating without wasting energy on overall pack cooling.

Source

Battery stack temperature monitoring device for BAMS batteries that allows more accurate and comprehensive temperature monitoring compared to direct contact methods. The device has a chassis with a pillar on top, a traversing device above the pillar, and an infrared thermal imager below the traversing device. The traversing device allows the imager to slide horizontally across the battery stack. This enables all-around temperature monitoring of the stack surface to detect local hotspots more precisely than a single fixed sensor.

Source