US 2009/0289602 A1Published application

Battery rejuvenation method and apparatus

OwnerMan Oi Nginventor

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Abstract

The present invention provides a battery rejuvenation method for rejuvenating a battery, which firstly pre-charges the battery for a short period of time and judges the battery condition by comparing the battery voltage to a preset reference voltage value, and then alternately performs an equalizing mode operation and a reconditioning operation to rejuvenate the battery until the battery voltage is not higher than the reference voltage value. The operations in equalizing mode and reconditioning mode could enhance the rejuvenating results by each other, which is not only dissolve the lead sulphate crystal, but also bring the electrolyte fluid to a well-distributed and fully-restored state. The present invention also provides a battery rejuvenation apparatus for rejuvenating a battery.

Claims16

Dependent claims

A battery rejuvenation method for rejuvenating a battery, comprising the following steps:

(a) pre-charging the battery for a short period of time;
(b) detecting the battery voltage and judging whether the battery voltage is higher than a reference voltage value;
(c) equalizing the battery with an equalizing voltage based on an equalizing current for a first period of time if it determines that the battery voltage is higher than the reference voltage value in the step (b);
(d) reconditioning the battery with a high instantaneous rising pulse current of high peak to peak amplitude and short pulse rising time for a second period of time;
(e) equalizing the battery with the equalizing voltage based on the equalizing current, detecting the battery voltage and judging whether the battery voltage is higher than a reference voltage value;
(f) maintaining the step (e) for a total period of time equal to the first period of time and then repeat the step (d) if it determines that the battery voltage is higher than the reference voltage value during the step (e), or stopping the step (e) immediately and proceeding to the next step whenever it determines that the battery voltage is not higher than the reference voltage value in step (e);
(g) reconditioning the battery with the high instantaneous rising pulse current for a third period of time.

4 more elements

A battery rejuvenation apparatus for rejuvenating a battery, comprising:

a pulse width modification controller which is used to generate a first pulse train signal and is connected to a first switching module to control the operation of the first switching module with the first pulse train signal;
a transformer having a primary winding and a secondary winding, in which the primary winding is connected to a main power source and to the ground through the first switching module;
a rectifier-filter module connected to the secondary winding of the transformer;
a first and second terminals connected to positive and negative terminals of the battery respectively, in which the second terminal is connected directly to the rectifier-filter module;
a second switching module connecting the rectifier-filter module to the first terminal;
a third switching module connected in parallel with the second switching module for connecting the rectifier-filter module to the first terminal;
a microcontroller unit for turning on the second switching module and the third switching module alternatively, in which when the second switching module is turned on, the rectifier-filter module charges or equalizes the battery, and when the third switching module is turned on, the rectifier-filter module reconditions the battery with a high instantaneous rising pulse current of high peak to peak amplitude and short pulse rising time.

4 more elements

Dependencies are inferred from the claim text.