Energy storage and charging-discharging controller with double-control heating function

Abstract

The invention discloses an energy storage and charging-discharging controller with the double-control heating function. The controller comprises a charging and discharging controller (1), a lithium battery (2) and a solar battery (3); and heating pieces (4) are pasted to the lithium battery (2). The charging and discharging controller (1) consists of a general charging circuit (11), a temperature measuring circuit (12), an MCU main control circuit (13), a heating plate control circuit (14) and a heating power supply selection circuit (15); the temperature measuring circuit (12) is connected with a temperature measuring input terminal of the MCU main control circuit (13); a temperature measuring probe of the temperature measuring circuit (12) is pasted to the surface of the lithium battery (2); the two ends of the heating pieces (4) are connected to the heating plate control circuit (14); the lithium battery (2) and the solar battery (3) are connected with the heating power supply selection circuit (15); and the heating plate control circuit (14) and the heating power supply selection circuit (15) are connected to the MCU main control circuit (13). The energy storage and charging-discharging controller has the following advantages: defects in the prior art are overcome; and the structural design is reasonable and novel.

Description

technical field [0001] The invention relates to an energy storage charge and discharge controller, in particular to an energy storage charge and discharge controller with a heating function. Background technique [0002] "Lithium battery" is a type of battery that uses lithium metal or lithium alloy as the negative electrode material and uses a non-aqueous electrolyte solution. With the development of science and technology, lithium batteries have become the mainstream now. Lithium-ion batteries have been widely used in portable electrical appliances such as laptops, cameras, and mobile communications due to their unique performance advantages. The developed large-capacity lithium-ion battery has been tested in electric vehicles and is expected to become one of the main power sources of electric vehicles in the 21st century, and will be applied in artificial satellites, aerospace and energy storage. With the shortage of energy and the pressure of the world's environmental ...

AI Technical Summary

Problems solved by technology

However, due to the chemical characteristics of lithium batteries, the charging and discharging efficiency, life, and safety of lithium batteries in low temperature environments have a major impact.

[0003] At present, the solar-lithium energy street lamp charging and discharging controller is not perfect for the low-temperature heating function of lithium batteries; especially for long-term extremely low temperature and cloudy and snowy weather environments such as Northeast China and Tibet, once the solar panels have no power generation conditions for many consecutive days; lithium batteries After power loss, it is in an extremely low temperature environment; only when the battery temperature rises with the ambient temperature can the current be recharged, resulting in the failure of normal use throughout the low temperature season

In a low temperature environment, the lithium battery is used to supply the battery with a single-control heating method. When the battery is undervoltage, if it cannot be charged in time, the battery temperature will continue to drop after losing the heating power supply. If it is lower than -15 degrees (due to the battery composition difference), restore the power generation capacity of the solar panels, and cannot be charged; the entire low temperature season will not be able to use normally

In a low temperature environment, the single-control heating method using solar panels to supply batteries will only activate the heating function during the day when there is charging capacity. Once the solar panels cannot generate electricity due to lack of sunlight or snow, the heating power will be lost The temperature of the battery continues to drop. If it is lower than -15 degrees (due to the difference in the composition of the battery), the power generation capacity of the solar panel will be restored, and it will not be able to charge; it will not be able to be used normally during the low temperature season

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