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93results about "Cell temperature regulation" patented technology

Electric car and electric car power system and battery heating method

The invention provides an electric car power system which comprises a battery pack, a battery heater, a battery manager, a distribution box, a motor, a motor controller and an isolation inductor. The battery heater is connected with the battery pack. The battery manager is respectively connected with the battery pack and the battery heater and used for alternately controlling the battery heater to heat the battery pack according to accelerator depth change velocity of an electric car when the temperature of the battery pack is lower than a first heating temperature threshold and the residual electric quantity is higher than a shutdown electric quantity threshold. The distribution box is used for distributing voltage output by the battery pack. The motor controller is connected with the motor and the distribution box and provided with a first input end, a second input end and a pre-charging capacitor. The pre-charging capacitor is connected between the first input end and the second input end and matched with the isolation inductor. The power system is capable of realizing heating and greatly lowering use limitation in a low-temperature environment, high in heating efficiency, low in cost, and highly practical. The invention further provides an electric car battery heating method and an electric car.
Owner:BYD CO LTD

Method and system for heating a vehicle battery

A method and system for heating a vehicle battery, such as the type used for vehicle propulsion in a hybrid electric vehicle (HEV). Depending on the battery chemistry involved, such batteries may not perform well in extremely cold environments. For instance, a lithium-ion battery can exhibit a high internal resistance when the battery is extremely cold, which in turn can negatively affect the available power or other capabilities of the battery. According to an exemplary embodiment, the method and system take advantage of the high internal resistance in a cold vehicle battery by purposely cycling electrical current in and / or out of the battery so that heat is created. This heat warms up the vehicle battery and thereby improves its overall performance and capabilities.
Owner:GM GLOBAL TECH OPERATIONS LLC

Heating circuit of battery

The invention provides a heating circuit of a battery. The heating circuit comprises a switching device (10), a switching control module (100), a unidirectional semiconductor element D10, a damping element R and a transformer (T), wherein the switching control module (100) is electrically connected with the switching device (10); the battery, the damping element R, the first coil of the transformer (T) and the switching device (10) are mutually connected in series to form a battery discharging circuit; and the battery, the damping element R, the second coil of the transformer (T) and the unidirectional semiconductor element D10 are mutually connected in series to form a battery charging circuit. Current limit and energy storage are realized by using the transformer (T), the current in the charging and discharging circuits can be reduced to avoid damaging the battery, and the energy consumption of the whole heating process is reduced.
Owner:BYD SEMICON CO LTD

A heat pipe temperature control system for a vehicle power battery box

ActiveCN102280672ASolve problems that are greatly affected by temperatureEasy to useBattery isolationCell temperature regulationHeat sinkOperating environment
The present invention relates to the technical field of electrically powered automobiles, and in particular relates to a temperature control system with thermal tubes for a vehicle power battery box. The temperature control system with thermal tubes comprises an outer battery box, an inner battery box, and a plurality of battery cells provided inside the inner battery box, with heat-sink thermal tubes or heating thermal tubes closely clamped between the battery cells; the heat-sink thermal tubes or heating thermal tubes are separated from each other; a heat-preserving plate for the outer box is provided on the body of the outer battery box, and a cover plate for the inner box is provided on the top of the body of the inner battery box; the other parts of the body of the inner battery box are provided with heat-preserving plates for the inner box; heating devices are provided on the bottom of the inner battery box; heat-sink fans are provided on the outer battery box. The temperature control system with thermal tubes can be used to heat the battery during subzero winters in northern regions as well as to dissipate heat from the battery during hot weather in summers, providing a good operating environment for the battery cells and playing an important role in improving the service performance and the safety of the battery cells.
Owner:CHINA ELECTRIC POWER RES INST +1

Constant temperature control battery pack

The present invention relates to the technical field of power supplies of electric vehicles, hybrid electric vehicles and electric aircrafts, especially to a constant temperature control battery pack. The constant temperature control battery pack comprises an inner box and a battery pack. Heat exchange liquid is arranged inside the inner box. A temperature detection device is arranged on an upper cover of the box. The constant temperature control battery pack further comprises a heating apparatus, a cooling apparatus, a first pipeline and a second pipeline. According to the present invention, the automatic constant temperature control system is provided for the relation between the electrochemical characteristics of the battery pack and the temperature changing, wherein the automatic constant temperature control system can be provided for heating the battery pack, cooling the battery pack, and holding the temperature of the battery pack to enable the battery pack to work in an optimal temperature range; the battery pack is prevented from influence due to the environmental temperature changing; the battery pack using is prevented from influence due to the using area; the performance of the battery pack can be provided at maximum at any temperature; the generated heat can be rapidly dissipated when the battery has the short-circuit fault, such that the misfire and the burning can not be generated; the capacity, the efficiency, the service life and the safety of the battery pack are improved; the constant temperature control battery pack provided by the present invention provides significant advances than the battery pack in the prior art.
Owner:DONGGUAN LONGXING AVIATION TECH

Method for mitigating thermal propagation of batteries using heat pipes

A battery module with one or more battery cells and a heat exchange member placed in thermal communication with the battery cell, and a method of making a heat pipe system from the heat exchange member. The heat exchange member includes a container with a heat transfer fluid disposed therein. In one form, the heat transfer fluid is capable of going through a phase change as a way to absorb at least a portion of heat present in or generated by battery cell. A pressure control device cooperates with the container and heat transfer fluid such that upon attainment of a predetermined thermal event within the battery cell, the pressure control device permits liberation of at least a portion of the heat transfer fluid to an ambient environment, thereby relieving pressure on the container and removing some of the excess heat caused by the thermal event.
Owner:GM GLOBAL TECH OPERATIONS LLC

A cylindrical lithium-ion power battery

The invention discloses a cylindrical lithium ion power cell, which comprises a cylindrical housing, a positive electrode cover plate, a negative electrode cover plate, a positive electrode post, a negative electrode post, a center tube and an electrical core, and is characterized in that the positive electrode cover plate and the negative electrode cover plate are respectively fixed on two ends of the housing; the positive electrode post and the negative electrode post are respectively disposed on the positive electrode cover plate and the negative electrode cover plate; the center tube is positioned inside the housing; the two ends of the center tube are respectively connected with the positive electrode post and the negative electrode post; and the electrical core contains a negative electrode piece, an isolated film and a positive electrode piece, wherein the negative electrode piece, the isolated film and the positive electrode piece successively wind on the center tube; the negative electrode cover plate is equipped with a through hole; a negative electrode ceramic ring is seal welded inside the through hole; and the negative electrode post is disposed through the central hole of the negative electrode ceramic ring and seal welded with the negative electrode ceramic ring. According to the invention, the ceramic ring is used to separate the negative electrode cover plate from the negative electrode post, and vacuum sealing can be achieved after the ceramic ring is welded, thus greatly raising the reliability of the cell sealing and guaranteeing the security of the cell used for a long time; in addition, the cell provided by the invention has a long service life.
Owner:YINLONG ENERGY CO LTD
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