A battery system may include multiple battery cells grouped into modules. Each battery module may have a diffuser plate to direct the hot gases and molten material that are ejected during cell failure. The gas and material may be directed away from the nearest neighboring cells in the event of a single cell thermal runaway. Residual thermal energy is wicked away, absorbed or contained to keep heat away from the neighboring cells. These and other features may manage the blast energy and residual thermal energy of a single cell failure event. This may prevent a cascading failure of the larger battery system, thereby mitigating the risk of injury to personnel and property.

A battery system for an electric vehicle includes a first battery module with a first heater and a second battery module with a second heater. The battery system also includes a control system configured to selectively activate the first or the second heater to dissipate energy from the first or the second battery module.

A battery system for an electric vehicle includes a first battery module with a first heater and a second battery module with a second heater. The battery system also includes a control system configured to selectively activate the first or the second heater to dissipate energy from the first or the second battery module.

The present application relates to a method for estimating the temperature rise rate of a battery under pulsed heating. An equivalent circuit model of the battery is established to obtain the effective entropy potential of the battery and the relationship between the open circuit voltage and the pulsed heating current of the battery. A heat generation model is established according to the effective entropy potential and the relationship between the open circuit voltage and the pulsed heating current. Using the heat generation model and the heat transfer power, an energy formulation in the process of pulsed heating is obtained, to obtain the temperature rise rate of the battery under pulsed heating. The models are used to obtain the relationship between the temperature rise rate under pulsed heating and the pulsed heating current, providing a convenient and comprehensive estimation method for determining the heating effect of pulsed heating in practical applications.

The present application relates to a method for estimating the temperature rise rate of a battery under pulsed heating. An equivalent circuit model of the battery is established to obtain the effective entropy potential of the battery and the relationship between the open circuit voltage and the pulsed heating current of the battery. A heat generation model is established according to the effective entropy potential and the relationship between the open circuit voltage and the pulsed heating current. Using the heat generation model and the heat transfer power, an energy formulation in the process of pulsed heating is obtained, to obtain the temperature rise rate of the battery under pulsed heating. The models are used to obtain the relationship between the temperature rise rate under pulsed heating and the pulsed heating current, providing a convenient and comprehensive estimation method for determining the heating effect of pulsed heating in practical applications.

This application provides a battery module and a device, and relates to the technical field of batteries. The battery module includes a battery cell, a circuit board, a temperature sensor, and a fixing component. The circuit board is disposed at a top of the battery cell and electrically connected to the battery cell. The temperature sensor is disposed at the top of the battery cell and configured to measure a temperature of the battery cell. The temperature sensor is electrically connected to the circuit board. The fixing component includes a fixing portion and a rotation portion. The fixing portion is fixed to the top of the battery cell. The rotation portion is screwed into the fixing portion so that the temperature sensor is pressed against the battery cell tightly. This application can improve accuracy of temperature collection of the battery cell.

A temperature regulating system of an in-vehicle battery is disclosed in the present disclosure. The system includes: a heat exchanger; an in-vehicle air conditioner, where the in-vehicle air conditioner is provided with an air conditioner vent, a first air duct is formed between the air conditioner vent and the heat exchanger, a semiconductor heat exchange module, where a second air duct is formed between a cooling end of the semiconductor heat exchange module and the first fan, and a third air duct is formed between the cooling end of the semiconductor heat exchange module and a compartment; a battery thermal management module, where the battery thermal management module is connected to the heat exchanger to form a heat exchange flow path; and a controller, connected to the semiconductor heat exchange module, the battery thermal management module, and the in-vehicle air conditioner.

A temperature regulating system of an in-vehicle battery is disclosed in the present disclosure. The system includes: a heat exchanger; an in-vehicle air conditioner, where the in-vehicle air conditioner is provided with an air conditioner vent, a first air duct is formed between the air conditioner vent and the heat exchanger, a semiconductor heat exchange module, where a second air duct is formed between a cooling end of the semiconductor heat exchange module and the first fan, and a third air duct is formed between the cooling end of the semiconductor heat exchange module and a compartment; a battery thermal management module, where the battery thermal management module is connected to the heat exchanger to form a heat exchange flow path; and a controller, connected to the semiconductor heat exchange module, the battery thermal management module, and the in-vehicle air conditioner.

A battery heating system includes: a temperature monitoring circuit configured to output a temperature monitoring signal; a voltage conversion circuit configured to receive a first voltage that is input by a power supply or a second voltage that is input by a to-be-heated battery; and a control circuit configured to receive the temperature monitoring signal and output a control signal. The voltage conversion circuit is configured to perform boosting processing or bucking processing on the first voltage based on the control signal or perform boosting processing or bucking processing on the second voltage based on the control signal to enable the to-be-heated battery to receive a charging current from the power supply in a first time segment using the voltage conversion circuit and the to-be-heated battery to output a discharging current to the power supply in a second time segment using the voltage conversion circuit.

A battery module system includes a cooling device, a battery module disposed on the cooling device, the battery module being in direct or indirect contact with the cooling device, a sensor attached to the battery module to sense a temperature of the battery module or gas generated from the battery module, a battery management system to output a switching on/off signal with reference to a sensing signal transmitted from the sensor; and an external short-circuiting device connected between the positive electrode and negative electrode of the battery module to induce an external short circuit of the battery module, the external short-circuiting device including: a resistor disposed on the cooling device, the resistor being in direct or indirect contact with the cooling device; and a switch to electrically connect or isolate the battery module to/from the resistor according to the switching on/off signal.