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Method, system and device for adjusting charging current ripple of backup battery unit

A charging current and backup battery technology, which is applied in the direction of battery circuit devices, electrical components, collectors, etc., can solve the problems of reducing the service life of BBU, large charging current ripple, and low operating frequency of MCU, so as to improve the minimum resolution, The effect of improving the service life and reducing the charging current ripple

Pending Publication Date: 2022-01-07
SUZHOU LANGCHAO INTELLIGENT TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The operating frequency of the MCU is relatively low, and the resolution of the PWM duty cycle adjustment is not enough. Adding or subtracting 1 to the duty cycle will cause excessive overshoot, resulting in excessive charging current ripple and reducing the service life of the BBU.

Method used

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  • Method, system and device for adjusting charging current ripple of backup battery unit
  • Method, system and device for adjusting charging current ripple of backup battery unit
  • Method, system and device for adjusting charging current ripple of backup battery unit

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Embodiment Construction

[0066] In order to make the object, technical solution and advantages of the present invention clearer, the embodiments of the present invention will be further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0067] It should be noted that all expressions using "first" and "second" in the embodiments of the present invention are to distinguish two entities with the same name but different parameters or parameters that are not the same, see "first" and "second" It is only for the convenience of expression, and should not be construed as a limitation on the embodiments of the present invention, which will not be described one by one in the subsequent embodiments.

[0068] Based on the above purpose, the first aspect of the embodiments of the present invention proposes an embodiment of a method for adjusting the charging current ripple of the backup battery unit, such as figure 1 As shown, the method includes t...

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Abstract

The invention discloses a method, system and device for adjusting charging current ripples of a backup battery unit, and the method comprises the steps: obtaining a set charging current value and an actual output current value of a charging circuit in the backup battery unit, and obtaining a current error based on the set charging current value and the actual output current value; obtaining a PID output value based on a PID algorithm and the current error, and limiting the amplitude of the PID output value between 0 and 1; obtaining the conduction time of an MOS tube in the charging circuit based on the amplitude-limited PID output value; obtaining a switching period of the MOS tube based on the conduction time; and respectively writing the conduction time of the MOS tube and the switching period of the MOS tube into a comparison register and a period register so as to adjust the charging current ripple of the backup battery unit. Through the scheme of the invention, the value of the comparison register and the value of the period register can be adjusted so as to adjust the duty ratio of the PWM, the minimum resolution that the duty ratio can be adjusted is improved, the charging current ripple of the backup battery unit is reduced, and the service life of the backup battery unit is prolonged.

Description

technical field [0001] The invention relates to the technical field of power supplies, in particular to a method, system and equipment for adjusting the charging current ripple of a backup battery unit. Background technique [0002] In the storage system, the BBU (Backup Battery Unit) module is responsible for temporarily supplying power to the system when the AC power fails, giving the system enough time to save data and avoid loss of user data. In order to ensure that the BBU has sufficient power throughout the life cycle of the storage system, it is necessary to perform good charging management, reduce the charging current ripple, and prolong the service life of the BBU. [0003] In order to reduce power consumption and cost, the BBU generally uses a low-cost MCU (Micro Controller Unit, micro control unit, also known as a single-chip microcomputer) to perform PWM (Pulse Width Modulation, pulse width modulation technology) control on the charging circuit. The operating fr...

Claims

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Application Information

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IPC IPC(8): H02J7/00
CPCH02J7/0029H02J7/00714H02J7/00716Y02E60/10
Inventor 崔学涛
Owner SUZHOU LANGCHAO INTELLIGENT TECH CO LTD
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