Precise load current generator of lithium battery

Abstract

The invention discloses a precise load current generator of a lithium battery. The generator comprises a lithium battery unit of current-constant charging and discharging, a data collection unit, a control execution unit, a microprocessor control unit and a PC data collection and analysis unit, wherein the lithium battery unit is connected with the data collection unit, the data collection unit is connected with the microprocessor control unit, the microprocessor control unit is connected with the lithium battery unit and the data collection unit via the control execution unit, and the microprocessor control unit is connected with the PC data collection and analysis unit via a communication interface. The controlled load current collection unit uses a single-chip microcomputer to convert a given current signal into a given voltage signals and further to realize controllable adjustment of the load current, the load current is collected by collecting the resistance voltage drop of a diverter, and the load current can be collected highly precisely via a load resistor. The discharging and charging current of the lithium battery can be tested precisely and controlled in a programmable manner.

Description

technical field [0001] The invention relates to the technical field of lithium battery detection, in particular to a lithium battery precision load current generator. Background technique [0002] With the improvement of industrial production and human life's requirements for energy storage devices, battery technology has developed by leaps and bounds in recent years. Various types of batteries have been widely used in people's daily production and life. come higher. At present, the more mature and widely used batteries are mainly lead-acid batteries, nickel-metal hydride batteries and lithium-ion batteries. Among the many types of batteries, lithium-ion batteries are light in weight, small in size, long in And other advantages to gradually replace nickel metal hydride and other batteries, become a new generation of ideal power. Lithium batteries in production and life applications have basic requirements: high specific energy, high specific power; short charging time, hig...

AI Technical Summary

Problems solved by technology

[0003] With the increase of application occasions, it has been found in practice that the output characteristics of lithium batteries are greatly affected by factors such as ambient temperature and charging and discharging conditions. The performance of the battery decreases in terms of cycle times and output power. Not only can the performance indicators not be equal to that of the single battery, but the service life is also greatly shortened, which seriously affects the development and application of lithium batteries.

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