Method of performance analysis for VRLA battery

• US 8,340,934 B2
• Filed: 04/17/2008
• Issued: 12/25/2012
• Est. Priority Date: 04/20/2007
• Status: Active Grant

• Current Assignee: Hangzhou Gold Electronic Equipment Company Limited
• Original Assignee: Hangzhou Gold Electronic Equipment Company Limited
• Inventors: Xu, Jianhong, Yuan, Ling, Zheng, Yi
• Primary Examiner(s): TSAI, CAROL S W
• Application Number:
  US12/596,698
• Publication Number:
  US 20100131218A1
• Time in Patent Office: 1,713 Days
• Field of Search: 702/63, 324/426, 324/430, 324/431, 324/439, 320/132, 320/156, 320/107, 320/116, 320/145, 320/134
• US Class Current: 702/63
• CPC Class Codes: G01R 31/3648 comprising digital calculation means, e.g. for performing an algorithm
• CPC Class Codes: G01R 31/379 for lead-acid batteries
• CPC Class Codes: G01R 31/3835 involving only voltage measurements
• CPC Class Codes: H01M 10/121 Valve regulated lead acid batteries [VRLA]
• CPC Class Codes: H01M 10/48 Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte constructional details of current conducting connections for detecting conditions inside cells or batteries, e.g. details of voltage sensing terminals, H01M50/569
• CPC Class Codes: Y02E 60/10 Energy storage using batteries

Abstract

This invention discloses a method of performance analysis for VRLA battery which applies the method of using the float voltage dispersion ratio of the battery to evaluate the battery performance from a new perspective, and it is an online real-time test which applies several ways to evaluate the performance of the VRLA battery. According to the relevance between the dispersion of the float charge voltage of the battery and its performance, the method gets the result of the battery performance through calculating the battery float charge voltage dispersion ratio and making it relevant with the battery performance. It has small workload, convenient operation and no danger to the system when doing online testing. It also won'"'"'t affect the cycle life of the VRLA battery.

Claims

1. A method of conducting performance analysis of a valve-regulated lead-acid (VRLA) battery in a battery set of two or more VRLA batteries, comprising the steps of:

consecutively gathering float charge voltage variables of the VRLA battery through a measurement device, and

conducting cluster and weighted analysis and obtaining results of the battery performance through a computer;

wherein the mentioned float charge voltage variables are any one or the combination of those selected from the group consisting of;

float charge voltage variables of a single battery relative to itself, a float charge voltage variable of a single battery relative to the battery set, variable of the float charge voltage dispersion ratio of a single battery relative to itself and variable of the float charge voltage dispersion ratio of a single battery relative to the battery set;

wherein the float charge voltage variable of a single battery relative to itself is obtained through following steps;

storing float charge voltage of each battery in a certain period; and

calculating change of the float charge voltage of each battery relative to itself in this period; and

wherein the float charge voltage variable of a single battery relative to itself is calculated by equation (1);

2. The method according to claim 1, wherein the float charge voltage variable of a single battery relative to the battery set is obtained through following steps:

storing the float charge voltage of each battery in a certain period; and

calculating the change of the float charge voltage of each battery relative to the battery set in this period;

wherein the float charge voltage variable of a single battery relative to the battery set is calculated by equation (2)

3. A method of conducting performance analysis of a valve-regulated lead-acid (VRLA) battery in a battery set of two or more VRLA batteries, comprising the steps of:

consecutively gathering float charge voltage variables of the VRLA battery through a measurement device, and

conducting cluster and weighted analysis and obtaining results of the battery performance through a computer;

wherein the mentioned float charge voltage variables are any one or the combination of those selected from the group consisting of;

float charge voltage variables of a single battery relative to itself, a float charge voltage variable of a single battery relative to the battery set, variable of the float charge voltage dispersion ratio of a single battery relative to itself and variable of the float charge voltage dispersion ratio of a single battery relative to the battery set;

wherein the float charge voltage variable of a single battery relative to the battery set is obtained through following steps;

storing the float charge voltage of each battery in a certain period; and

calculating the change of the float charge voltage of each battery relative to the battery set in this period; and

wherein the float charge voltage variable of a single battery relative to the battery set is calculated by equation (2);

4. A method of conducting performance analysis of a valve-regulated lead-acid (VRLA) battery in a battery set of two or more VRLA batteries, comprising the steps of:

consecutively gathering float charge voltage variables of the VRLA battery through a measurement device, and

conducting cluster and weighted analysis and obtaining results of the battery performance through a computer;

wherein the mentioned float charge voltage variables are any one or the combination of those selected from the group consisting of;

float charge voltage variables of a single battery relative to itself, a float charge voltage variable of a single battery relative to the battery set, variable of the float charge voltage dispersion ratio of a single battery relative to itself and variable of the float charge voltage dispersion ratio of a single battery relative to the battery set;

wherein the variable of the float charge voltage dispersion ratio of a single battery relative to itself is obtained through following steps;

storing the float charge voltage of each battery in a certain period; and

calculating the variable of the float charge voltage dispersion ratio of a single battery relative to itself based on probability and statistics; and

wherein the variable of the float charge voltage dispersion ratio of a single battery relative to itself is calculated by equation (3);

5. A method of conducting performance analysis of a valve-regulated lead-acid (VRLA) battery in a battery set of two or more VRLA batteries, comprising the steps of:

consecutively gathering float charge voltage variables of the VRLA battery through a measurement device, and

conducting cluster and weighted analysis and obtaining results of the battery performance through a computer;

wherein the mentioned float charge voltage variables are any one or the combination of those selected from the group consisting of;

float charge voltage variables of a single battery relative to itself, a float charge voltage variable of a single battery relative to the battery set, variable of the float charge voltage dispersion ratio of a single battery relative to itself and variable of the float charge voltage dispersion ratio of a single battery relative to the battery set;

wherein the mentioned variable of the float charge voltage dispersion ratio of a single battery relative to the battery set is obtained through following procedures;

store the float charge voltage of each battery in a certain period;

calculate the variable of the float charge voltage dispersion ratio of a single battery relative to the battery set based on probability and statistics; and

wherein the variable of the float charge voltage dispersion ratio of a single battery relative to the battery set is calculated by equation (4);