A method for preheating a battery includes acquiring an ambient temperature of a preheating zone, determining if the ambient temperature of the preheating zone satisfies a preset temperature condition, and, if the ambient temperature does not satisfy the preset temperature condition, controlling heating of the preheating zone until the ambient temperature satisfies the temperature condition.

An air conditioner includes a battery temperature adjustment device which adjusts the temperature of a battery and has a refrigerant-heat medium heat exchanger to exchange heat between a refrigerant and a heat medium. A controller executes a first heating/battery cooling mode to let the refrigerant discharged from a compressor radiate heat in a radiator, decompress the refrigerant, and then let the refrigerant absorb heat in an outdoor heat exchanger and the refrigerant-heat medium heat exchanger, and a second heating/battery cooling mode to let the refrigerant discharged from the compressor radiate heat in the radiator and the outdoor heat exchanger, decompress the refrigerant, and then let the refrigerant absorb heat in the refrigerant-heat medium heat exchanger.

A battery management device includes an SOC estimation unit, a storage unit, and a lithium deposition determination unit. The lithium deposition determination unit compares a differential coefficient of a battery voltage with respect to an SOC estimated by the SOC estimation unit and a differential coefficient of a battery voltage with respect to a reference SOC read from the storage unit, and determines that, if a difference is observed between the differential coefficients, lithium is deposited in a lithium ion secondary battery.

A battery management device includes an SOC estimation unit, a storage unit, and a lithium deposition determination unit. The lithium deposition determination unit compares a differential coefficient of a battery voltage with respect to an SOC estimated by the SOC estimation unit and a differential coefficient of a battery voltage with respect to a reference SOC read from the storage unit, and determines that, if a difference is observed between the differential coefficients, lithium is deposited in a lithium ion secondary battery.

Disclosed is a battery apparatus that measures a temperature of the battery apparatus, determines an estimated naturally-decreasing temperature based on information including a difference between the temperature of the battery apparatus and an atmospheric temperature in response to the temperature of the battery apparatus being higher than the atmospheric temperature, determine a stop temperature based on a reference temperature of the stop temperature and the estimated naturally-decreasing temperature, and stops a cooling operation of the battery apparatus in response to the temperature of the battery apparatus being lower than the stop temperature.

Disclosed is a battery apparatus that measures a temperature of the battery apparatus, determines an estimated naturally-decreasing temperature based on information including a difference between the temperature of the battery apparatus and an atmospheric temperature in response to the temperature of the battery apparatus being higher than the atmospheric temperature, determine a stop temperature based on a reference temperature of the stop temperature and the estimated naturally-decreasing temperature, and stops a cooling operation of the battery apparatus in response to the temperature of the battery apparatus being lower than the stop temperature.

Disclosed are a battery thermal management method and device. The battery thermal management device includes a first thermal manager configured to regulate a battery temperature using a liquid working fluid, a second thermal manager configured to regulate the battery temperature using a gaseous working fluid, and the second thermal manager works with the first thermal manager by exchanging heat between the liquid working fluid and the gaseous working fluid.

A battery system can provide backup power for information technology (IT) equipment. In response to a lithium ion based battery being inactive (not charging or discharging), a temperature of the battery can be maintained at or below an optimal storage temperature of the battery, using a primary cooling system. If the primary cooling system is insufficient, the temperature can be maintained at or below the optimal storage temperature with a secondary cooling system that runs in addition to the primary system. The optimal storage temperature of the battery is determined based on an effort to cool the battery and a degradation of the battery.

A battery management system thermally conditions a battery assembly prior to a determined upcoming time or the battery assembly's arrival at an upcoming location, and selects a source of the power used for the thermal conditioning.

A battery management system thermally conditions a battery assembly prior to a determined upcoming time or the battery assembly's arrival at an upcoming location, and selects a source of the power used for the thermal conditioning.