A lithium battery system comprising a battery and a feedback current control apparatus having a first current capture device that comprises: a first feedback current capture module for capturing feedback current; a first switch module for conducting or unidirectionally cutting off a main circuit; and a control module for receiving a first voltage of one end of a driver on the main circuit, a second voltage of one end of the battery, and the temperature of the battery. When a difference between the first and second voltage is greater than a preset voltage and the temperature of the battery is less than or equal to a preset temperature, the first switch module is controlled to unidirectionally cut off the main circuit to capture feedback current by the first feedback current capture module on a first current capture circuit, greatly reducing the probability of lithium precipitation and risk of thermal runaway.

The present invention relates to a battery pack having a cooling unit provided outside a pack case, and more particularly a battery pack including a battery module (100) including one or more unit cells; a case (200) having a receiving portion configured to receive the battery module (100); a cooling unit (300) located at an outer bottom surface of the case (200); and a reinforcement member (400) configured to protect the cooling unit (300).

A battery module and a battery pack including the same are provided. Battery cells are manufactured in the form of a module, and thus, even when the specifications of the battery pack are changed depending on a vehicle kind, the standardized battery cells are applicable to battery packs having various specifications and a separate design process for disposing the battery cells in the battery pack may be omitted, thereby reducing the development period and costs of a new battery pack. Further, plural temperature sensors configured to measure the temperatures of the battery cells are provided so as to provide the optimum environment to the battery cells, and the respective temperature sensors may not be located inside the battery module so as to be easily managed. Moreover, surface pressure performance due to end plates may be secured even when the temperature sensors are located outside the battery module.

A battery module and a battery pack including the same are provided. Battery cells are manufactured in the form of a module, and thus, even when the specifications of the battery pack are changed depending on a vehicle kind, the standardized battery cells are applicable to battery packs having various specifications and a separate design process for disposing the battery cells in the battery pack may be omitted, thereby reducing the development period and costs of a new battery pack. Further, plural temperature sensors configured to measure the temperatures of the battery cells are provided so as to provide the optimum environment to the battery cells, and the respective temperature sensors may not be located inside the battery module so as to be easily managed. Moreover, surface pressure performance due to end plates may be secured even when the temperature sensors are located outside the battery module.

AC current heating of a battery is performed using a half-bridge based quasi-resonant circuit.

AC current heating of a battery is performed using a half-bridge based quasi-resonant circuit.

The present application provide a control method of a power battery heating system. The method includes: controlling all upper bridge arms of a first bridge arm group and all lower bridge arms of a second bridge arm group to be turned on, and all lower bridge arms of the first bridge arm group and all upper bridge arms of the second bridge arm group to be turned off, so as to form a first loop; controlling all the lower bridge arms of the first bridge arm group and all the upper bridge arms of the second bridge arm group to be turned on, and all the upper bridge arms of the first bridge arm group and all the lower bridge arms of the second bridge arm group to be turned off, so as to form a second loop. The method is used to heat the power battery.

The present application provide a control method of a power battery heating system. The method includes: controlling all upper bridge arms of a first bridge arm group and all lower bridge arms of a second bridge arm group to be turned on, and all lower bridge arms of the first bridge arm group and all upper bridge arms of the second bridge arm group to be turned off, so as to form a first loop; controlling all the lower bridge arms of the first bridge arm group and all the upper bridge arms of the second bridge arm group to be turned on, and all the upper bridge arms of the first bridge arm group and all the lower bridge arms of the second bridge arm group to be turned off, so as to form a second loop. The method is used to heat the power battery.

A vehicle thermal management system, may include an HVAC subsystem including a first compressor and a first refrigeration cycle including a first refrigerant loop fluidly connected to the first compressor; a battery cooling subsystem including a battery coolant loop fluidly connected to a battery pack; a powertrain cooling subsystem including a powertrain coolant loop fluidly connected to a powertrain component; a second refrigeration cycle including a second compressor, a condenser located on the downstream side of the second compressor, and a second refrigerant loop fluidly connected to the condenser; a refrigerant chiller mounted between the first refrigeration cycle and the second refrigeration cycle and configured to transfer heat between the first refrigeration cycle and the second refrigeration cycle; and a battery chiller mounted between the second refrigeration cycle and the battery coolant loop and configured to transfer heat between the second refrigeration cycle and the battery coolant loop. The condenser of the second refrigeration cycle is thermally connected to at least one of the battery coolant loop and the powertrain coolant loop.

A vehicle thermal management system, may include an HVAC subsystem including a first compressor and a first refrigeration cycle including a first refrigerant loop fluidly connected to the first compressor; a battery cooling subsystem including a battery coolant loop fluidly connected to a battery pack; a powertrain cooling subsystem including a powertrain coolant loop fluidly connected to a powertrain component; a second refrigeration cycle including a second compressor, a condenser located on the downstream side of the second compressor, and a second refrigerant loop fluidly connected to the condenser; a refrigerant chiller mounted between the first refrigeration cycle and the second refrigeration cycle and configured to transfer heat between the first refrigeration cycle and the second refrigeration cycle; and a battery chiller mounted between the second refrigeration cycle and the battery coolant loop and configured to transfer heat between the second refrigeration cycle and the battery coolant loop. The condenser of the second refrigeration cycle is thermally connected to at least one of the battery coolant loop and the powertrain coolant loop.