136 patents in this list

Updated:

Electric vehicle battery packs contain thousands of cells operating at voltages above 400V, with individual cell temperatures varying by up to 15°C during normal operation. Accurate temperature measurement is critical, yet traditional sensor placement methods often introduce measurement delays or create electrical isolation challenges that compromise safety and performance.

The fundamental challenge lies in achieving precise real-time temperature monitoring of individual cells while maintaining electrical isolation and minimizing thermal mass effects on the measurements.

This page brings together solutions from recent research—including thermally conductive intermediary structures, optical fiber sensing membranes, remote temperature-sensitive patches, and fault-tolerant sensor networks. These and other approaches focus on practical implementations that balance measurement accuracy with safety requirements in high-voltage environments.

1.Base Plate with Integrated NTC Sensor for Direct Battery Temperature Measurement

EVE ENERGY CO., LTD., 2025

Temperature collecting device for batteries that simplifies assembly and improves temperature measurement accuracy. The device has a base plate with an integrated NTC sensor and encapsulation. The base plate connects to FPC and busbars instead of complex sensor fixtures. This allows direct contact with cell surfaces for temperature measurement. It eliminates the need for separate sensor fixing structures. The base plate design provides better heat dissipation, faster assembly, and easier temperature data transfer compared to traditional sensor mounting.

2.Battery Cell Temperature Sensing System with Compact Sensor Body and Dual Support Structure

MAHLE International GmbH, 2025

A battery cell temperature sensing system for electric vehicle batteries that provides improved temperature measurement accuracy and reliability. The system uses a custom sensor design with a compact sensor body that is sandwiched between the battery cell and the battery housing base. The sensor body has separate supports for attaching to the cell and housing base. The sensor element is enclosed in a recess in the housing base support. This configuration allows the sensor to be tightly sandwiched between the cell and housing for accurate temperature measurement, while also protecting the sensor from the battery cooling medium.

3.Battery System with Integrated Fire Suppression Using Refrigerant Circulation and Sensor-Controlled Cooling

SK ON CO., LTD., 2025

Battery system with fire suppression capability to prevent propagation of fires between battery modules and extinguish fires in individual modules. The system uses a cooling plate with a refrigerant accommodation space, connected cooling passages, and a circulation pump. The pump circulates refrigerant between the cooling plate and passages. Temperature sensors on the modules and a pressure sensor in the passages are connected to a processor. The processor stops the pump if module temperatures exceed a threshold, but starts it if pressure drops below a threshold. This allows selective refrigerant flow to cool overheated modules without continuous pumping. It also prevents pump leakage misdiagnosis by periodic pumping.

4.Battery Thermal Management System with Targeted Heating Activation for Thermal Runaway Containment

HYUNDAI MOTOR COMPANY, KIA CORPORATION, 2025

Controlling battery thermal management in electric vehicles to prevent thermal runaway from spreading between battery modules. The method involves detecting battery cell temperature and voltage to identify the location of thermal runaway. Then, heating devices near the thermal barrier on the opposite side of the runaway cell are activated to generate heat. This minimizes thermal transfer to the barrier and prevents further spread. The technique allows reducing barrier thickness without risking runaway propagation.

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5.Energy Storage Cabinet with Air Guide Channel and Temperature-Controlled Variable Inlet

Shenzhen CLOU Electronics CO., LTD., 2025

Energy storage cabinet design to improve battery temperature uniformity and extend battery life. The cabinet has an air guide portion with a channel that slows down airflow entering the battery compartment. This prevents hotspots and temperature gradients in the batteries. The cabinet also has a variable-sized inlet hole controlled by a temperature sensor. This allows adjusting the airflow rate based on battery temperature. The cabinet also has an external air supply. By controlling the airflow speed and distribution, it can equalize temperatures throughout the batteries. This improves battery life by preventing hotspots that degrade performance.

6.Integrated Battery Cell Temperature Probe with Overlapping Coated Materials for Voltage-Based Thermal Sensing

GM Global Technology Operations LLC, 2025

Integrated temperature probe for monitoring battery cell temperatures inside a stack of battery cells in an electric vehicle. The probe is placed between the electrode layers of a cell without altering cell operation. It consists of two materials partially coating the separator that overlap at an overlap region. Sensor terminals are connected to the materials. A voltage differential between the terminals corresponds to the average temperature at the overlap region. Multiple probes in different cells provide cell stack temperature mapping.

7.Battery Temperature Measurement Using Integrated Circuit with Self-Heating Compensation

Datang NXP Semiconductors Co., Ltd., DATANG ENZHIPU SEMICONDUCTOR CO LTD, 2024

Accurately measuring battery temperature using an integrated circuit (IC) already present in the battery pack, instead of adding separate temperature sensors. The IC contains a voltage sensor, temperature sensor, and processing logic. To calibrate, the thermal resistance between the IC and battery terminal is estimated by measuring temperatures with different current draw. During normal operation, the IC measures voltage, current, and temperature. It calculates power consumption and self-heating from the voltage and current. The self-heating is then subtracted from the measured temperature to compensate for the IC's own heat generation.

8.Battery Pack Cell Thermal Management Assembly with Independent Fluid Flow Control and Thermal Insulation

HUTCHINSON, 2024

Assembly for thermal management of individual cells in a battery pack that allows precise temperature control of each cell. The assembly has multiple features to address temperature regulation needs: 1. Thermal insulation between cells to prevent heat transfer. 2. Fluid passages for cooling or heating the cells. 3. Valves and flow control to selectively circulate fluids. 4. Temperature sensors and actuators to respond to cell conditions. 5. Fluid supplies for different operating conditions. The assembly enables independent temperature regulation of each cell without mixing fluids between cells. This prevents overheating or cooling of cells while avoiding thermal runaway. The fluid flow control allows customization based on factors like discharge level, charging rate, and ambient temperature.

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9.Battery Compartment with Thermosensitive Device-Activated Pneumatic Cover Release System

IVECO S.P.A., 2024

Vehicle with battery compartment safety system that automatically opens the compartment covers when battery temperature reaches a critical level to prevent thermal runaway propagation. The system uses thermosensitive devices to detect high battery temperature and pneumatic actuators to instantly open the compartment covers. This allows rapid cooling to contain thermal runaway without needing manual intervention.

10.Battery Temperature Measurement System with Multi-Point Sensor Array and Control Method for Thermal Management

CHINA FAW CO LTD, 2024

Battery temperature measurement system and control method for electric vehicles to improve battery safety and accuracy. The system has multiple temperature sensors in each battery cell group, core group, and ambient area. This provides full temperature detection inside the battery. The BMS uses the sensor data to control battery cooling and charging based on cell, core, and ambient temps. This allows balancing temperatures and preventing excessive differences.

11.Battery Cell Incorporating Internal Thermally Conductive Element for Precise Temperature Measurement

Bayerische Motoren Werke Aktiengesellschaft, 2024

Battery cell design for accurate temperature measurement in high-voltage batteries for electric vehicles. The battery cell has a separate thermally conductive part inside the housing that connects to the temperature sensor. This allows more accurate measurement of the cell interior temperature compared to an external sensor since it eliminates insulation barriers. The conductive part is separate from the electrode to avoid current interference.

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12.Battery Module with Internal Temperature Sensor in Plugging Member within Cover Assembly

CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED, 2024

Battery module with a temperature sensor that accurately measures the internal battery temperature to prevent premature power limiting in high load conditions. The sensor is installed in the battery housing rather than on the external connection strap. This allows it to better reflect the internal battery temperature. The sensor is located inside a plugging member that fits into the battery cover. The cover has a temperature collection hole and sink groove for the sensor. This arrangement enables timely and accurate internal battery temperature monitoring to prevent power limiting due to temperature differences between the external connection and internal battery.

13.Battery Pack Temperature Field Prediction via 3D Convolutional Neural Network Analysis

XIAMEN YUDIAN AUTOMATION TECH CO LTD, XIAMEN YUDIAN AUTOMATION TECHNOLOGY CO LTD, 2024

Real-time temperature detection method for battery packs using deep learning and convolutional neural networks to accurately predict battery pack temperatures based on measurements at limited sampling points. The method involves training a 3D convolutional neural network to take input of battery voltage, current, and temperature at a few points and output the entire 3D temperature field of the pack. This leverages the correlation of spatial data in the pack and allows more realistic prediction compared to 2D models.

14.Battery Cell Temperature Measurement System with Optical Sensors and Non-Invasive Monitoring

GM GLOBAL TECH OPERATIONS LLC, GM GLOBAL TECHNOLOGY OPERATIONS LLC, 2024

A battery cell temperature measurement system for electric vehicles that allows non-invasive, contactless temperature monitoring of individual battery cells in a pack without requiring physical access to the cells. The system uses optical sensors placed on the module frame to measure temperature through apertures in the frame. A Cell Monitoring Unit (CMU) generates cell temperatures based on the optical measurements. This provides a quick, non-contact way to monitor cell temperatures without touching the cells or modifying the pack design.

15.Battery Pack with Temperature-Imbalance Mitigation via Differential Monitoring and Adaptive Control

LG ENERGY SOLUTION LTD, 2024

Battery control system to prevent degradation of battery cells due to temperature imbalance between cells. The system has temperature sensors on cells at different locations in the battery pack. It monitors the temperatures of cells at opposite points. If temperature difference exceeds a threshold, the controller performs compensation actions to balance the cells. This can involve adjusting charge/discharge rates or cell balancing algorithms to account for the temperature mismatch. This prevents imbalance-induced degradation when cells operate at different temperatures.

16.Battery Cell with Distributed Temperature Sensor Array and Stacked Film Configuration

BEIJING CHJ AUTOMOTIVE TECH CO LTD, BEIJING CHJ AUTOMOTIVE TECHNOLOGY CO LTD, 2024

Battery cell design with improved temperature sensing for more accurate temperature monitoring and capacity utilization. The battery cell has a temperature sensor array on the cell body instead of just one point. This allows measuring temperatures at multiple locations inside and outside the cell, reducing errors compared to single point measurement. The sensor area is at least 10% of the cell surface. The sensor is a stacked film with insulating layers and a sensing layer. By increasing sensor contact with the cell body, it provides more accurate temperature data for battery management.

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17.Battery Pack Temperature Sensing Device with Thermal Conductive Core and Insulating Layer

BEIJING CHJ AUTOMOTIVE TECH CO LTD, BEIJING CHJ AUTOMOTIVE TECHNOLOGY CO LTD, 2024

Battery pack temperature sensing device that provides improved safety and real-time monitoring of battery pack temperatures compared to traditional methods. The device uses a thermal conductive core with an exposed surface connected directly to the battery cells. This core collects temperature from all the cells and transfers it to a temperature sensing element. The sensing element converts the temperature signal into an electrical signal. This allows continuous monitoring of all cell temperatures, rather than just a few points. The sensing element can detect abnormal temperatures earlier, giving time for action, as heat accumulates in the core before reaching the sensing surface. The device also uses an insulating layer to cover part of the core surface, exposing the sensing surface to the cells.

18.Battery Module with Dual Temperature Sensors for Differential Thermal Monitoring

BYD COMPANY LTD, XIANGYANG FUDI BATTERY CO LTD, 2023

Battery module with temperature sensors to accurately monitor battery temperature in different areas. The module has two temperature sensors, one closer to the battery pole and the other farther away. This allows collecting temperature values from high and low regions of the battery. The sensor positions enable comprehensive and accurate battery temperature monitoring compared to using a single sensor. This helps optimize battery performance and longevity by ensuring it operates at suitable temperatures.

19.Battery Temperature Management System with Integrated Sensors and Regulators for Electric Aircraft

BETA AIR, LLC, 2023

System for maintaining optimal temperature of batteries in electric aircraft to improve performance and lifespan. The system uses temperature sensors between the pouch cells and temperature regulators to actively manage the battery pack temperature. A computing device monitors cell temperatures and directs the regulators to heat or cool as needed to meet a target temperature. This prevents overheating or undercooling.

20.Battery Management System Sensor Fault Diagnosis Using Uncertain Noisy Filtering with Zonotope Kalman Filter and Augmented State Constraints

JIANGNAN UNIVERSITY, 2023

A fault diagnosis method for battery management systems that can detect faults in sensors like temperature sensors inside the system. The method uses uncertain noisy filtering to estimate sensor faults by extending the state constraint of the battery system to the system output vector. This allows detecting faults in sensors with constraints like temperature limits. The method involves constructing an augmented system with expanded fault vectors and state constraints, then using a zonotope Kalman filter to estimate fault intervals. If the estimated fault bounds exceed the normal range, it indicates a sensor fault.

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21. Temperature Sensing System for Electrical Terminals Using Thin Film Material with Remote Detection Capabilities

22. Battery Pack Thermal Event Detection System with Sensor Reliability Assessment

23. Battery Thermal Management via Temperature Gradient Analysis in Sensor Network

24. Battery Monitoring Method with Periodic Wake-Up for Continuous Temperature Exposure Assessment

25. Battery Pack Temperature Control System with Ambient Temperature Sensors and Selective Heating Activation

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