Method of Performance Analysis for VRLA Battery

• US 20100131218A1
• Filed: 04/17/2008
• Published: 05/27/2010
• 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: Yuan, Ling, Zheng, Yi, Xu, Jianhong
• Granted Patent: US 8,340,934 B2
• Time in Patent Office: Days
• 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 VRLA battery performance analysis, whose feature is to consecutively gather the float charge voltage variables of VRLA battery, to do the cluster and weighted analysis, and then to obtain the set of results.

2. The method of claim 1, wherein the mentioned float charge voltage variables are any one or the combination of several ones among those as follows:

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

3. The method of claim 2, wherein the mentioned float charge voltage variable of a single battery relative to itself is got through the following procedures:

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

calculate the change of the float charge voltage of each battery relative to itself in this period.

4. The method of claim 3, wherein the mentioned float charge voltage variable of a single battery relative to itself is calculated by equation (1):

5. The method of claim 2, wherein the mentioned float charge voltage variable of a single battery relative to the battery set is got through following procedures:

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

calculate the change of the float charge voltage of each battery relative to the battery set in this period.

6. The method of claim 5, wherein the mentioned float charge voltage variable of a single battery relative to the battery set is calculated by equation (2)

7. The method of claim 2, wherein the mentioned variable of the float charge voltage dispersion ratio of a single battery relative to itself is got 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 itself based on probability and statistics.

8. The method of claim 7, wherein the mentioned variable of the float charge voltage dispersion ratio of a single battery relative to itself is calculated by equation (3):

9. The method of claim 2, wherein the mentioned variable of the float charge voltage dispersion ratio of a single battery relative to the battery set is got 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.

10. The method of claim 9, wherein the mentioned variable of the float charge voltage dispersion ratio of a single battery relative to the battery set is calculated by equation (4):