source:Industry News release time:2023-02-17 Hits: Popular:Lithium-ion battery wholesale
Pre -heating of lithium batteries is one of the effective ways to solve the problem of low temperature characteristics of lithium batteries. The use of lithium battery's own power to provide power supply for heating equipment is a commonly used battery heating method, but this method will consume a considerable part of the battery energy during the heating process, which will reduce the effective capacity of lithium battery discharge to a certain extent. Common lithium battery low temperature heating technology is divided into two types: external heating and internal heating. Let's introduce these two lithium battery low temperature heating technology. External heating methods include air heating, liquid heating, phase -changing material heating, and heat resistance heating device or heat pump heating. These heating methods are generally located in the battery pack, or in a container that is set in a thermal circulation medium. The internal heating method heating the battery is to motivate the internal electrochemical substances inside the battery through AC current, so that the battery itself generates heat.
1. External heating
Regarding the use of air to heat, some researchers used the battery to conduct experiments with a set of atmospheric simulation systems. The experimental results showed that compared to batteries exposed in low -temperature environments, the surrounding air was heated to release more capacity.
Compared with air heating, liquid heating has a better heating rate and higher thermal conversion efficiency. However, liquid heating requires more complicated heating systems. There are many practical cases in the application of liquid heating in electric vehicles and hybrid vehicles. For example: In the Chevrolet Volt car, heating surrounding the battery pack heating solution is heated by a 360V heater.
The heating battery of phase -changing materials has also been used. When the battery temperature drops to the phase change temperature point of the phase transformer material, the heat stored in the phase transformer material will be released to keep the ambient temperature constant, that is, pass the calories to the battery pack. The main advantage of phase -changing materials is that it can be used in an environment with a faster temperature change.
2. Internal heating
Communication inspiration heating. Compared with external heating, another commonly used heating method, the structural design will be relatively simple, that is, heating batteries through the transformer current. It does not need to be designed with heat transfer structure, but only loads a certain frequency of communication and incentives in the positive and negative electrode of the battery. The incentive effect is on the electrochemical substance inside the battery, which is equivalent to the effect of reciprocating and discharging discharge.
Compared with DC heating current, the AC current or positive square wave current can heated the battery during the discharge and charging cycle, so that the battery temperature will rise, and the battery loading status (SOC) is basically unchanged. Due to these characteristics, the internal warm -up method has become a field of more research. In 2004, a foreign researcher was the first to propose to use the current transformer current to heated directly to the lithium ion battery, and only use the resistance effect of the battery to produce heat. They did some tests of different batteries in different SOC states and different temperatures (-20 ° C ~ 40 ° C). The test results show that under a certain multiplier current, all batteries will produce heat quickly.
Read recommendations:
solar power battery storage company
3kw solar portable power station 110v 220v 3000w inverter lifepo4 battery fast charging ups convenie
Last article:Balanced principle of battery pack
Next article:Advantages of Ni-MH battery
related suggestion
48v lithium golf cart battery
2023-03-22lithium batteries for solar panels Manufacturing
2023-03-20lithium golf cart batteries Factory
2023-03-22portable power station 1000w
2023-04-07lithium batteries for solar panels
2023-04-07lithium marine batteries Processor
2023-03-22lifepo4 battery 12v
2023-05-08best batteries for off grid solar
2023-05-0812v 100ah battery
2023-05-08solar energy storage
2023-05-0848v lifepo4 battery
2023-05-08best battery for solar panel
2023-05-0818650 Battery Pack 11.1V Lithium Ion Battery for Light
2023-02-1412V 400Ah LiFePo4 Lithium Replacing Lead-acid Battery Pack
2023-06-2112V Rechargeable Lithium Ion 18650 Battery Pack 2000mAh
2023-02-14AGV Robot 60V 72V 50Ah 60Ah Motive Battery Pack
2023-02-14Lithium Replacing Lead-Acid LiFePo4 Battery Pack 12V 200Ah
2022-09-19What are the characteristics of robot batteries?
2023-02-06The reason lithium-ion batteries are really green
2022-10-11Aquatic solution lithium battery system.home battery generator
2023-07-19Is it safe to use lithium batteries with high internal resistance and high energy?
2023-10-08Lithium ion battery separator.portable power station solar
2023-07-05Large current lithium battery.best deep cycle marine battery
2023-03-09How to choose a car emergency starting power supply?best batteries for off grid solar
2023-05-09Polymer lithium battery research cutting edge
2023-02-16How to judge whether your electronic equipment can be brought on the plane
2022-12-17Characteristics and Applications of Rare Earth Lithium Batteries.12 volt deep cycle batteries
2023-10-10