55results about How to "Improve thermal management efficiency" patented technology

The invention belongs to the technical field of power battery systems for electric vehicles and in particular relates to a power battery thermal management system for an electric vehicle. The power battery thermal management system comprises a battery box, a lithium ion battery system, an air cooling system and a water cooling system, wherein the lithium ion battery system, the air cooling system and the water cooling system are installed in the battery box, the battery box is internally provided with a heat insulation device, and the heat insulation device is adhered to the inner wall of the battery box. According to the power battery thermal management system disclosed by the invention, as heat insulation is installed in the battery box as a thermal management mode of a battery system of the electric vehicle in a non-running state, and the air cooling system and the water cooling system are arranged as a thermal management mode of the battery system of the electric vehicle in a running state, the service life loss and the safety hidden dangers as the battery system of the electric vehicle is in high or low temperature environment for a long time can be reduced; the temperature in a battery pack is not too high or low when the vehicle runs, and the thermal management efficiency of the vehicle during running is also improved.

The invention discloses a thermal management system of a BEV (battery electric vehicle) and an air conditioning system. The thermal management system comprises a battery pack thermostat and a water heater, wherein an inlet of the water heater is connected with an outlet of a dynamic cooling system through a first water pump, an outlet of the water heater is connected with an inlet of a heating core of the air conditioning system of the vehicle, an outlet of the heating core is connected with a first inlet of a first water tank, and an outlet of the first water tank is connected with an inlet of the dynamic cooling system; the outlet of the heating core is connected with a first inlet of the battery pack thermostat through a third solenoid valve, the heating core is used for providing a heat source for the battery pack thermostat, a first outlet of the battery pack thermostat is connected with a second inlet of the first water tank, and the first inlet of the battery pack thermostat is communicated with the first outlet. The thermal management system not only can realize the heating requirement of an air conditioner of a new energy vehicle, but also can use a small amount of electric energy, recover waste heat of a motor for reheating and realize thermal balance between a heating system and a cooling system of a battery system.

The invention discloses a control method of an automobile comprehensive thermal management system. The control method comprises the following steps that a comprehensive thermal management controller acquires the temperature of cooling liquid in a motor cooling loop and the average temperature of a power battery; if the temperature of the cooling liquid in the motor cooling loop reaches the high temperature of a motor or the average temperature of the power battery reaches the high temperature of the battery, the refrigeration mode is started, the motor cooling loop is neutralized or the cooling liquid in the battery cooling loop is cooled until the temperature of the cooling liquid in the motor cooling loop is lower than the cooling cut-off limit value of the motor, and the average temperature of the power battery is lower than the cooling cut-off limit value of the battery; and if the average temperature of the power battery is lower than the low temperature of the battery, the heating mode is started, the cooling liquid in the battery heating loop is heated by utilizing the heat generated in the automobile comprehensive thermal management system until the average temperature of the power battery is higher than the heating cut-off limit value of the battery, and then the shutdown mode is executed.

An integrated thermal management module may include a first pump for flowing coolant of an indoor heating line for connecting a first heat exchanger heat-exchanged with a condenser of a refrigerant line and an indoor air-conditioning heating core, a second pump for flowing coolant of an indoor cooling line for connecting a second heat exchanger heat-exchanged with an evaporator of a refrigerant line and an indoor air-conditioning cooling core, a fourth pump for flowing coolant of a battery line for connecting a high-voltage battery core and a third radiator, a first valve simultaneously connected to a second radiator line for connecting the first heat exchanger and a second radiator, the indoor heating line, and the battery line to change flow direction of the coolant, and a second valve simultaneously connected to the indoor cooling line and the battery line to change flow direction of the coolant.

The present invention discloses a heat radiation structure based on a graphene thermal interface layer. The structure comprises: multiple graphene layers, wherein each graphene layer has thickness andthe same length and width; multiple bonding layers, wherein each bonding layer has a thickness and one length and one width being the same as these of the graphene layers, the bonding layers and thegraphene layers alternatingly form a stacked structure, the stacked structure is subjected to spiral turning by taking a width direction as a shaft in a length direction starting from one end of the stacked structure to form a cylindrical spiral coil, the top surface and the bottom surface of the spiral coil are planes formed by spiral turning of two opposite thickness surfaces of the multiple graphene layers and the multiple bonding layers. The efficient heat radiation packaging structure based on the graphene thermal interface layer and the manufacturing method thereof effectively utilize graphene high-surface inner thermal conductivity and achieve efficient heat radiation packaging.

The invention relates to a temperature management device of a power battery pack of an electric automobile, as well as a manufacture method and an application method thereof. The manufacture method comprises the following steps: cellular stainless steel sheet material is designed; the material is filled with flexible porous nano carbon fiber solvent adsorbate; solvent adopts a non-straight damp pressed flowing mode; a heating device is provided. The temperature management device can perform heating when the temperature is low and perform cooling when the temperature is high, so as to enable the temperature to be balanced. The temperature management (cooling, heating and balancing) device of the power battery pack applied to the electric automobile mainly perform management of heating at low temperature, cooling at high temperature and temperature balancing on the power battery pack, improves the safety of the power battery pack and the temperature management efficiency, reduces the temperature difference among cells in the power battery pack, ensures that the power battery pack can be normally operated when the finished automobile is in a defined operating environment, prolongs the service life of the power battery pack, improves the safety use of the power battery pack, and reduces the after-sales maintenance of the power battery pack.

The embodiment of the invention provides a whole vehicle thermal management method, system and device for an electric vehicle and a storage medium. The method comprises the steps: controlling a battery auxiliary loop main contactor of a BMS to be closed if a charging instruction transmitted by the BMS is received; controlling a main contactor of a direct current converter DCDC and a main contactorof an air conditioning system to be closed to enables the DCDC and the air conditioning system to be powered on; controlling the DCDC to start to work so as to provide power for a battery cooling water pump and a motor cooling water pump; receiving a request mode sent by the BMS in the charging process; and controlling the working states of the battery cooling water pump, a power battery, the airconditioning system and the motor cooling water pump according to the request mode. According to the embodiment of the invention, rapid cooling of the power battery can be realized to ensure that thepower battery is safer in the charging process, and the thermal management efficiency of the whole vehicle can be improved.

The embodiment of the invention discloses a vehicle-mounted battery heat management system and method of a new energy vehicle. The vehicle-mounted battery heat management system of the new energy vehicle comprises an environment information sensor, a vehicle-mounted remote information processor and a vehicle control unit, wherein the environment information sensor is used for detecting environment information of the new energy vehicle; the vehicle-mounted remote information processor is used for accessing a storage medium to obtain a heat insulation mode or receiving a remote message containing the heat insulation mode, determining a wake-up period on the basis of the environment information, waking up the vehicle control unit on the basis of the wake-up period and transmitting the heat insulation mode to the vehicle control unit; and the vehicle control unit is used for outputting a vehicle-mounted battery heat management instruction generated on the basis of the heat insulation mode after being waked up. According to the vehicle-mounted battery heat management system of the new energy vehicle, by considering the environment information, heat management can be preferably performed, the service life of a battery can be prolonged, heat management can also be performed in the case that the whole vehicle is stationary or static, and a working condition preferably satisfies use requirements.

The invention discloses a thermal management system of a power battery pack and an electric automobile with the system. The thermal management system comprises the power battery pack, a heat exchangecirculating pipeline, an air conditioning system of the electric automobile and a first PTC heater, wherein the power battery pack is provided with a main water inlet and a main water outlet; the twoends of the heat exchange circulating pipeline are connected with the main water inlet and the main water outlet respectively; the air conditioning system of the electric automobile comprises a refrigerating system and a warm air system, the refrigerating system comprises a compressor, a condenser and an evaporator, the evaporator comprises a first heat exchange channel and a second heat exchangechannel which are in heat exchange with each other, the first heat exchange channel is connected between the compressor and the condenser in series, and the second heat exchange channel is part of theheat exchange circulating pipeline; the warm air system comprises a warm air pipeline, and the warm air pipeline is selectively communicated with the heat exchange circulating channel; the first PTCheater is used for selectively heating heat exchange liquid in the heat exchange circulating channel. According to the thermal management system, heating and cooling of the power battery pack are uniform, the structure is simple, and the cost is low.

The invention discloses a bracket for a core module. In particular, the bracket comprises a frame main body, wherein a through hole is formed in the frame main body; a heat sink is arranged inside theframe main body; a core heat dissipation region exposed via the through hole is formed on the heat sink; the bottom of the frame main body is also provided with heat dissipation slots with slot widthextending to both sides of the heat sink; the heat sink is communicated into the heat dissipation slots and extends to the inner walls of the heat dissipation slots to form a radiation rib covering the whole heat dissipation slots; and the frame body is also provided with polar earholes around the through hole. The invention also discloses a solid-state battery module structure using the bracketfor the core module. The bracket has the advantages of excellent core heating and cooling effects, uniform thermal field of the battery module, convenience in assembly, and easy assembly of the solid-state battery module.

The invention discloses an electric vehicle thermal management system, method and apparatus, belonging to the technical field of electric vehicles. The electric vehicle thermal management system is characterized in that the first end of a compressor in the system is connected to an exterior heat exchanger through a reversing valve, and a stop valve is arranged on a connecting passage with the exterior heat exchanger; the second end of the compressor is connected to a battery heat exchanger through the reversing valve, and a stop valve is arranged on the connecting passage; the exterior heat exchanger is connected with an electric heater and a heat exchanger in turn; the heat exchanger is connected to the battery heat exchanger through an expansion valve, and the heat exchanger is in parallel connection with a power system liquid cooling loop through a three-way valve; the system realizes thermal management of the battery by controlling the reversing valve, each stop valve and each expansion valve; and in the thermal management process, the exterior heat exchanger is heated by controlling the three-way valve and/or the electric heater when the exterior heat exchanger is required tobe heated. The electric vehicle thermal management system can achieve the defrosting effect, so that the exterior heat exchanger can work stably to ensure the stability of the system performance and improve the thermal management efficiency.

The invention discloses a new energy vehicle thermal management system. The new energy vehicle thermal management system comprises a first cooling circuit, a second cooling circuit, a third cooling circuit, a fourth cooling circuit and a fifth cooling circuit. The new energy vehicle thermal management system has five circulation modes, and effective cooling and heating of ternary lithium batteriescan be satisfied so that the maximum property is given to full play; thermal management efficiency is improved; and the system structure is simplified. The invention further discloses a battery electric vehicle.

The embodiment of the invention relates to the technical field of battery heat radiation, in particular to a new energy source commercial vehicle battery pack and an electric vehicle. The new energy source commercial vehicle battery pack comprises a box body, a liquid cooling assembly, a sealing ring, a sealing element, a plurality of conflux elements and a plurality of battery modules, wherein the liquid cooling assembly is provided with a plurality of liquid cooling plates; the box body comprises an accommodating cavity with an opening; the liquid cooling assembly is arranged in the accommodating cavity; each battery module is fixedly attached to each liquid cooling plate; all of the conflux elements are arranged among the plurality of battery modules in a staggered way; each conflux element is electrically connected with every two battery modules so as to form a module structure with two free ends; the sealing ring is arranged at the edge of the opening; the sealing element is buckled in a position, far away from the opening edge, of the sealing ring. The new energy source commercial vehicle battery pack has the advantages that the local targeted heat management can be performedon a battery; the heat management effect is improved.

The invention discloses a vehicle thermal management method, device and system. According to the scheme, the method comprises the steps: detecting the external environment temperature of a vehicle; when the external environment temperature is lower than a first preset value, detecting the water inlet temperature of a cooling water circulation loop of the vehicle electric drive thermal management system; controlling the circulation direction of cooling water in a cooling water circulation loop and the circulation direction of heating water in a heating water circulation loop of the vehicle battery heat management system based on the water inlet temperature; and heating a vehicle battery located on the heated water circulation loop based on the cooling water and the heated water. The cooling water waste heat of the vehicle battery heat management system can be effectively utilized to heat the vehicle battery, the battery energy consumption is reduced, and the vehicle heat management efficiency is improved.

The invention provides a heating and cooling system for an automobile power battery. The system comprises an expansion kettle, a circulating water pump, a battery cooler and a heater. The expansion kettle is connected with the circulating water pump through a first pipeline, the circulating water pump is connected with the battery cooler through a second pipeline, the battery cooler is connected with the heater through a third pipeline, the heater is connected with the expansion kettle through a fourth pipeline, the battery cooler is used for refrigerating the power battery, and the heater isused for heating the power battery. In operating of the circulating water pump, cooling fluid is driven by the circulating water pump to circulate on the battery cooler and the heater so as to improveefficiency in heat exchange between the battery cooler and the heater and the power battery. By the heating and cooling system, electric automobile cost can be reduced, and heat management efficiencyof the power battery can be improved.

The invention discloses a metal hydride hydrogen storage tank. The metal hydride hydrogen storage tank comprises a tank body, a flange cover, a heat exchange pipe and cooling fins, wherein a storage cavity is formed inside the tank body, a storage groove is formed in the side wall of the storage cavity, the storage groove is filled with a composite phase change material, the flange cover is hermetically connected to a port of the tank body, a hydrogen inlet/outlet is formed in the flange cover and communicates with the storage cavity, the heat exchange pipe is arranged in the storage cavity, the input end and the output end of the heat exchange pipe communicate with the outside of the flange cover, the number of the cooling fins is multiple, the multiple cooling fins are arranged at intervals along arrangement track of the heat exchange pipe, and hydrogen storage materials are placed between the adjacent cooling fins. Therefore, heat management of the first stage is achieved through arrangement of the composite phase change material, heat management of the second stage is achieved through the heat exchange pipe, namely, the heat management efficiency is improved through different heat management modes, and the problem that an existing hydrogen storage tank is poor in heat management effect is solved.

The invention relates to a self-heating battery thermal management control device, a battery assembly, an electric vehicle and a method. Comprising a battery module, a cooling system, a self-heating system and a heat conduction structure, the cooling system is arranged at the lower end of the battery module; the self-heating system is fixed at the lower end of the cooling system and connected with positive and negative electrodes of the battery module to form a loop; a heat conduction structure is arranged between the battery module and the cooling system. IGBT switches in the positive and negative electrodes of the switch control high-frequency on-off with the self-heating high-voltage wiring harness through a battery BMS: after high-frequency on-off is formed, electric field high-frequency change exists in the self-heating high-voltage wiring harness, and a large amount of heat is generated by induction current generated in the heater due to an electromagnetic induction phenomenon through spiral lines around the heater; therefore, the heating function of the heating fixing plate can be achieved, and the heating fixing plate can heat cooling liquid in the cooling system. According to the invention, efficient cooling of the power battery and automatic heating of the battery pack can be realized, and the overall thermal management efficiency of the power battery is improved.

The invention provides a range extending type thermal management system and a range extending type vehicle, and relates to the technical field of vehicle thermal management, the range extending type thermal management system comprises an electric drive loop, a battery loop and a four-way valve, one end of electric drive equipment is connected with one end of a first electric drive pipeline, and the other end of the electric drive equipment is connected with one end of a second electric drive pipeline; the other end of the second electric drive pipeline is connected with one end of the low-temperature radiator, and the other end of the low-temperature radiator is connected with one end of the third electric drive pipeline; one end of the battery is connected with one end of the first battery pipeline, and the other end of the battery is connected with one end of the second battery pipeline; the four-way valve is communicated with the other end of the first battery pipeline and the other end of the first electric driving pipeline, and is communicated with the other end of the second battery pipeline and the other end of the third electric driving pipeline, so that the electric driving loop and the battery loop are connected in series and coupled, and the low-temperature radiator cools the battery; and the technical problem of relatively low efficiency in the battery cooling and heating process is relieved.