Digital power box charging and discharging control algorithm and control system

A charge-discharge control, digital power supply technology, applied in battery circuit devices, current collectors, electric vehicles, etc., can solve the problems of inability to achieve fast response, slow current response speed, poor current and voltage control accuracy, etc., to improve dynamic Response performance, shortened response time, and improved voltage accuracy

Pending Publication Date: 2021-12-14
ZHEJIANG HANGKE TECH
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Problems solved by technology

[0004] However, the existing technical solutions for charging and discharging power boxes generally have some shortcomings that can be ignored: first, the control accuracy of current and voltage is relatively poor. The control accuracy error is more than 2mV, which is difficult to meet the requirements of high-end li

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  • Digital power box charging and discharging control algorithm and control system
  • Digital power box charging and discharging control algorithm and control system
  • Digital power box charging and discharging control algorithm and control system

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[0074] The present invention will be further described below with reference to the accompanying drawings.

[0075] Referring to the drawings:

[0076] like figure 1 As shown, the digital power box charge and discharge control algorithm according to the present invention includes the following steps:

[0077] S1 sampling the voltage and current of the lithium battery;

[0078] S2 determine the working state of the digital power box according to the sampling results, and select whether or not the alarm is selected according to the result of the judgment; if the result of the judgment is faulty, then enter the fault status, and exit the control flow; if there is no fault, receive the upper command and resolve the operation instruction ;

[0079] S3 judges the running instruction and enter the corresponding state according to the result of the judgment:

[0080] If the charging command is determined, if the lithium battery state meets the charging state, if satisfied, first enter the ...

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Abstract

The invention discloses a charging and discharging control algorithm for a digital power box. The charging and discharging control algorithm comprises the following steps: sampling voltage and current of a lithium battery; judging the working state of the digital power box according to the sampling result, and selecting whether to give an alarm or not according to the judgment result; if a judgment result shows that a fault occurs, entering a fault state, and exiting a control process; if no fault occurs, receiving an upper command and analyzing the operation instruction; judging the operation instruction, and entering a corresponding state according to a judgment result. The invention further discloses a control system, and the control system comprises a proportional integral differential controller, an online adaptive zero-pole calculation structure, a feed-forward control structure, a zero-pole closed-loop control algorithm structure, a Buck/Boost circuit and a digital filter. The invention has the beneficial effects that the constant-voltage charging and discharging voltage precision and the constant-current charging and discharging current precision of the lithium battery are improved, and the response is quick in a full current basin range.

Description

technical field [0001] The invention relates to a charging and discharging control algorithm and a control system of a digital power supply box, belonging to the field of lithium battery charging and discharging equipment. Background technique [0002] At present, lithium batteries have been widely used in technical fields such as electric vehicles, consumer electronics, and micro-grid energy storage. In technical links such as lithium battery production, research and development, and testing, high-precision, high-reliability, and flexible charging and discharging power supplies The case is very necessary, and the research and development and promotion of related technologies and products are of great value to the further development of the lithium battery industry. [0003] The existing lithium battery charge and discharge power box generally adopts two technical routes of analog power supply scheme and digital power supply scheme. Among them, the analog power supply mainly...

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Application Information

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IPC IPC(8): H02J7/00
CPCH02J7/0029H02J7/00714H02J7/007182H02J7/0068
Inventor 蔡清源王阳康凯曹骥曹政
Owner ZHEJIANG HANGKE TECH
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