Rapid Charging for EV Batteries

Optimizing battery charging speed by dynamically adjusting charging power based on initial battery state and temperature. The method involves heating or cooling the battery during charging based on its initial temperature and charging at a high power until full. This achieves faster charging compared to fixed power charging at lower temperatures. The battery is heated if initially cold and cooled if initially hot. The charging power is initially set based on the initial temperature and SoC.

Source

Charging thermal management for vehicles to reduce charging time when using high-current fast chargers. The method involves pre-adjusting the battery temperature to match the fast charging requirements of the charger before the vehicle arrives. This is done by determining the optimal battery temperature based on factors like current battery state, charger capabilities, and expected arrival time. The battery temperature is then adjusted en route to the charger to optimize charging speed.

Source

High-efficiency charging control device for electric vehicles that reduces charging time and improves battery life by allowing variable current charging closer to constant power charging. The device uses a charging pile with a current collection resistor and switch connected to the vehicle's battery management system via the charging interface. This allows real-time adjustment of the charging current based on battery state.

Source

A method for charging an electric vehicle battery using a charging station that provides a higher initial charging rate followed by a lower rate. The charging station has an electronic controller. The method involves using the controller to provide a first charging mode where the battery is charged at maximum rate from the station and/or the battery itself. This is followed by a second charging mode with lower rate than maximum. This two-step charging allows faster initial charge to a useful level, then slower charge to finish without overloading the battery.

Source

Charging control system for electric vehicles that allows charging stations to actively manage the charging process and adapt it based on the vehicle's needs. The system enables chargers to modify the charging current and power during constant current or constant power charging modes based on commands from the vehicle. This allows chargers to optimize charging efficiency and performance by adjusting the charging profile to account for factors like battery state, environmental conditions, and travel distance remaining.

Source

Battery charging management method to optimize charging speed and battery life in different usage scenarios. The method involves determining the appropriate charging current based on real-time temperature and power data, and dynamically adjusting the charging mode to balance speed and safety. It uses a lookup table called the "charge quality action potential diagram" to find the optimal current given the temperature and state of charge. By selecting the appropriate current for each condition, charging efficiency is improved without overcharging or damaging the battery.

Source

Electric vehicle charging system that allows fast charging while minimizing battery degradation. The system uses optimized charging protocols based on battery condition to balance fast charging speed with battery life. It analyzes battery state during charging to determine degradation level. Then it adjusts charging parameters like current, duty cycle, and frequency for that battery to delay degradation while still allowing fast charging.

Source

A charge control device for electric vehicles that aims to reduce battery charging time by mitigating power loss when the vehicle is in use. The device monitors the difference between the power supplied by the charger and the power actually going into the battery due to other vehicle electronics. When this difference occurs, the charge controller increases the supply power to compensate and prevent a drop in battery charge rate. This prevents the battery from receiving less charge than intended when the vehicle is being driven, thus avoiding unnecessary extension of charging times.

Source

Low-temperature environment vehicle battery charging method to improve efficiency and practicality of current regulation for lithium-ion batteries in cold weather. The method involves determining the charging mode based on the battery temperature and ambient temperature. In low temperature, it adjusts the battery pack's request current to match the charging pile's output, covering vehicle load consumption and heating needs, to avoid SOC drop during charging. This ensures fast charging in cold environments. The charging mode also allows detecting and handling heating/charging circuit failures during charging for safety.

Source

Vehicle battery charging control method and battery management system to improve charging efficiency in cold temperatures. The method involves using a hot air fan to heat the battery during charging, but also increasing the charging current of specific cells that are still cold. This allows those cells to self-heat faster. By combining hot air heating and targeted cell current increases, the battery can be evenly heated and charged more quickly in cold conditions.

Source

A high-voltage battery charging system that enables efficient and effective battery charging and thermal management. The system uses a trained thermal management unit in the high-voltage circuit that starts cooling or heating when the battery temperature reaches a predetermined threshold. This adaptive thermal management improves charging efficiency and prevents overheating compared to fixed cooling/heating. The unit is constructed based on the startup environment threshold and trained using a neural network. The system also acquires battery temperature during charging and uses it to trigger the thermal management.

Source

Automatic charging current control when battery charging is abnormally terminated in an eco-friendly vehicle. The system uses the vehicle's onboard charger to request a charging current from the power supply. When charging is abruptly halted before completion, the charger adjusts the requested current based on information from the power supply upon termination and completion. This prevents failed charges due to low current availability and reduces charge time compared to manual adjustment.

Source

Efficiently charging electric vehicle batteries at low temperatures by dynamically adjusting the battery heating threshold based on charging conditions. The method involves determining a target charging power based on the maximum charging pile power and vehicle load power. If the battery charging power is less than the target, it is heated. Heating stops when charging power reaches the target. This improves charging efficiency by dynamically adjusting heating based on actual charging needs.

Source

Electric vehicle (EV) rapid charging system that extends the life of the charger's power modules by intelligently switching between DC and AC charging. The charger has separate DC and AC ports, and initially charges the EV battery quickly using DC. When the battery charge level reaches 80% and the charging speed drops below a threshold, the charger switches to AC charging to complete the charge. This reduces the amount of time the power modules are operating at reduced speeds, extending their lifespan.

Source

Battery charging method that optimizes charging speed and battery life by dynamically switching between heating pulses and regular charging based on pack temperature. The method involves applying alternating positive and negative pulses with a specific frequency to heat the battery pack when it's below a reference temperature. This helps raise pack temperature for faster charging. Once the pack reaches the reference temperature, regular charging current is applied.

Source

Charging method for battery cells in electric vehicles that optimizes charging efficiency by dynamically adjusting the charging rate based on battery temperature. The method involves charging the battery at a fixed rate until the temperature reaches a threshold, then gradually increasing the charging rate as the temperature rises. This allows maintaining the optimal charging rate for the battery throughout the charge cycle, avoiding inefficient charging due to high or low temperatures. The charging rate is adjusted in stages as the battery warms up.

Source

Method for charging a lithium battery to balance charging speed and safety by dynamically adjusting the charging current based on battery temperature and negative electrode potential. The charging current is determined initially. If the battery needs thermal management due to low temperature, a secondary current is calculated based on the primary current and pile power. During charging, if the negative electrode potential is not dropping enough, the primary current is increased to accelerate charging. This prevents overly long charging durations while ensuring sufficient charging rate. The dynamic current adjustment balances charging speed and safety by avoiding lithium plating and thermal runaway risks.

Source

Battery charging control method and device that prevents charging from stopping due to excessive heat generation in the battery during rapid charging. It calculates the charging power based on the battery temperature and voltage, and sends a charging command with the calculated power to the charger. This allows controlling the Joule heat generated in the battery during charging, preventing temperature rise that could stop charging. By managing the heat, it suppresses battery temperature rises that may trigger charging restrictions.

Source

Optimizing battery charging time for devices like electric vehicles by dynamically adjusting the charging current during the charging process based on battery state and temperature. The method involves initially determining a maximum safe charging current based on the battery's charge level and temperature. Then, the charging current is stepped down in a series of decrements while monitoring the battery voltage. If the voltage rises, the current is increased back to the previous level. This iterative process allows finding the optimal charging current for the battery's condition.

Source

A liquid cooled charging cable for electric vehicle charging stations that allows higher power charging than air cooled cables without becoming too large and heavy. The cable contains a coolant that is pumped around the conductors to cool them and prevent overheating at high charging currents.

Source