KR101836370B1 - Battery charging system of seald type and the method thereof - Google Patents

Abstract

According to the present invention, a charging system of a sealed battery is disclosed. The charging system of a sealed battery comprises a control unit for controlling a charging unit according to a charging condition set by controlling the charging unit for charging a battery unit by converting external power output through a charger into set power. The control unit sets a plurality of turn sections divided by at least one charging time, charges until reaching a set capacity with set voltage for the last charging time in each turn section, and sets the charging condition to charge as constant current during a set period of time when reaching the set capacity. Therefore, one time charging time is reduced, and the durability of a battery can be increased in the long term.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a charging system for a sealed battery,

The present invention relates to a system for charging a closed cell and a method thereof.

The lead-acid battery is electrolyzed by the charge-discharge reaction and self-discharge during use, and the oxygen hydrogen gas is lost to the atmosphere. Therefore, the battery which is fundamentally removed from the distilled water by fundamentally eliminating the inconvenience of periodically replenishing the distilled water, is absorbed by the negative electrode plate and then reduced to water, thereby removing the distilled water replenishment fundamentally.

Sealed battery is similar to Ni-Cd battery. It is divided into two types, GEL type and AGM type.

Among them, the GEL type is described as a thixotropic phenomenon (usually a gel, which is converted to a sol by an external shock, that is, a physical, electrical, or chemical shock, and then restored to gel) (ETDeBock, JRThomas) . Another theory is the theory of AGM cells, the cathode plate oxygen absorption theory.

Such a GEL type is advantageous in that when the battery is laid down, leakage of electrolyte is prevented due to the electrolytic solution becoming GEL, and life can be extended by blending with various special additives. Therefore, the closed type battery can be applied to a fixed type in all equipment requiring a direct current power source such as a communication system, a UPS system, an alternative energy generation system, a computer memory device, and various alarm devices.

However, such a conventional closed type battery has a problem that life is shortened as the number of times of charging and discharging is increased as it is used for a long time in a fixed type.

Korean Patent Laid-Open No. 10-2008-0105339 (Dec. 4, 2008)

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and it is therefore an object of the present invention to provide a charging apparatus, a charging method, a charging method, And a method for charging the sealed battery.

The present invention includes the following embodiments in order to achieve the above object.

A charging system for a closed-type battery according to the present invention comprises a battery which is made up of a closed type battery containing a gel type electrolyte and is charged and discharged, and an external power output through a charger, And a control unit for controlling the charging unit to charge the battery unit according to the set charging conditions by controlling the charging unit, wherein the control unit sets a plurality of rotation intervals divided by at least one number of times of charging, And the charging condition is set so as to be charged for a time set as a constant current when the charged capacity reaches the set capacity, .

Therefore, the present invention selectively applies the current charging period in which the charging current and the time are set for each turn interval classified as the number of times of charging, so that the charging time can be shortened for every single charging and the overcharging and the charging for a long time can be prevented There is an effect of extending the life span.

1 is a block diagram showing a charging system of a closed-type battery according to the present invention.
2 is a flowchart showing a charging method of a closed cell according to the present invention.
FIG. 3 is a table showing an example of a turning interval and a setting condition of step S100 in the present invention.
4 is a flowchart showing the step S420 in the present invention.

Hereinafter, embodiments and examples of the present invention will be described in detail so that those skilled in the art can easily carry out the present invention.

However, the present invention may be embodied in many different forms and is not limited to the embodiments and examples described herein, and the terms and words used in the specification and claims are not to be construed in a conventional or dictionary sense, It should be construed as meaning and concept consistent with the technical idea of.

Throughout the specification, when an element is referred to as "comprising ", it means that it can include other elements as well, without excluding other elements unless specifically stated otherwise.

1 is a block diagram showing a charging system of a closed-type battery according to the present invention.

Referring to FIG. 1, the charging system for a closed-type battery according to the present invention includes a charge unit 400 for supplying charged electric energy, a discharger 300 for discharging electric energy of the charge unit 400 to a connected load, A charging unit 200 charging the battery 400 with the external power supplied from the charger 500 and a controller 100 controlling the charging unit 200 to charge the battery 400 according to the set conditions, .

The battery 400 corresponds to any one of a lead-acid battery including a gel (GEL) type electrolyte or a secondary battery.

The discharger 300 converts the DC power discharged from the battery 400 into a DC-DC or DC-AC converted output to a connected load. Here, since the discharge unit 300 can be implemented by a generally known circuit, a detailed description thereof is omitted.

The charging unit 200 converts the external power supplied from the charger 500 to DC / DC and / or DC / AC conversion with a predetermined power supply level (for example, constant voltage and constant current)

The controller 100 counts the number of times of charging the battery 400 to accumulate the total number of times of charging, and controls the charging unit 200 according to the condition set for each time interval according to the number of times of charging.

Here, the rotation interval and setting conditions will be described with reference to FIG. The present invention sets the number of times the battery 400 reaches the charging state (STATE OF CHARGE) set at the set discharge depth (DOD: DEPTH OF DISCHARGE) as one charging time, And is set to a number of repeated sections divided into multiple sections.

For example, the first cycle interval is the number of times of charging from 1 to 10 times. 11th to 20th intervals for the second time interval, 21 to 30 times for the third time interval, and the accumulated number of times of charging is set for each time interval interval.

In this case, the charging conditions of the present invention are set differently according to the charging interval, and in particular, charging is performed under different charging conditions for the last charge period in the odd-numbered interval and the even-numbered interval, In the case of the previous charge, the battery is charged under one charge condition.

That is, the battery is charged in one charging condition (C) from the odd numbered interval (for example, 1, 3, 5, and 7th revolution interval) to 1 to 9 times, Charging condition (A). In addition, charges are filled in one charging condition (C) from 1 to 9 times in an even-numbered interval (for example, intervals of 2, 4, 6, 8, ..) 2 charging condition (B).

The first charging condition (A) and the second charging condition (B) are voltages (for example, 0.1 C / 2.4V), and when the charge current reaches the set capacity (for example, 0.01C), it is charged with the constant current for the set time. At this time, the charging time through the constant current in the first charging condition (A) and the second charging condition (B) is preferably set differently.

That is, the controller 100 divides the cumulative number of times of charge into a plurality of time periods and further subdivides the time periods into odd-numbered periods and even-numbered periods. The control unit charges the first charging condition (A) or the second charging condition (B) when the number of times of the last charging of the odd-numbered interval or the even-numbered interval corresponds to the number of the last charging. And controls the charging unit 200 to be charged to the condition (C).

The control unit 100 includes a sensing module 120 for sensing a charging capacity of the battery 400, a timer 130 for counting time, a counting module for counting the number of times of charging the battery 400, A display module 150 for displaying at least one of a counting count and / or a discharge depth and a charging state so that the counting count and / or the discharging depth and the charging state can be visually confirmed; A control module 110 for controlling the charging unit 200, and a switch 160 for outputting a charging command.

The sensing module 120 senses the voltage or current output from the charger 200 to the charger 400 and the capacity of the charger 400. The sensing module 120 senses a change in the discharge depth and / or the charging state of the battery unit 400 and outputs the sensing result to the control module 110 in real time.

The timer 130 counts the time from the moment when the charging power is outputted from the charger 200 to the charger 400 and outputs the counted time to the control module 110.

The counting module 140 accumulates and counts the number of times of charging the battery 400 under the control of the control module 110 and outputs the counting information including the accumulated number of times of charging at the request of the control module 110 .

Alternatively, the counting module 140 may detect that the charger 500 is connected to the charger 200, and may automatically accumulate the counting count. For example, the charger 200 includes an outlet or a connector to which a plug of a charger for outputting external power is connected. The counting module 140 detects that the charger is connected to the charger 200, can do. This can be realized by providing a sensor (pressure sensor, or contact sensor) for detecting that the plug is plugged in the outlet.

Alternatively, the controller 100 may further include a switch 160 for outputting a charge command after the charger 500 is connected to the charger 200. Accordingly, the counting module 140 may count the number of times of charging when the switch 160 is turned on.

The display module 150 outputs at least one of the number of times of charge, the depth of discharge, and the state of charge by visually checking the control module 110 under the control of the control module 110. For this, the display module 150 may be implemented as a display panel using an LED or an LCD.

3, the control module 110 determines whether or not the first charging condition A, the second charging condition B, and the one charging condition C are satisfied in accordance with the cumulative count number of the counting module 140 And controls the charging unit 200 to charge the battery. At this time, when the detection module 120 detects the output power of the charger 200 or the switch 160 is turned on, the control module 110 transmits counting information including the accumulated number of times of charging to the counting module 140 And calculates an applicable charging condition to control the charging unit. When the charging is completed, the control module 110 drives the counting module 140 to accumulate the number of charging times.

Here, if the number of the last charging in the odd-numbered interval (for example, the first interval, the third interval, and the fifth interval), the control module 110 sets the set first charging condition To control the charging unit 200. At this time, the first charging condition is 0.1 C / 2.4 V, the charging current is reached to 0.01 C, and after reaching 0.01 C, the constant current is charged for 2 hours. The control module 110 turns off the charger 200 when two hours have elapsed due to the time counting of the timer 130.

Alternatively, if the control module 110 is in the last charging state in an even-numbered interval (for example, a second time interval, a fourth time interval, a sixth time interval, etc.) 200). At this time, the second charging condition is 0.1 C / 2.4 V, the charging current is reached to 0.01 C, and after reaching 0.01 C, the constant current is charged for 4 hours. The control module 110 turns off the output of the charger 200 after four hours have elapsed due to the time counting of the timer 130. [

Alternatively, the control module 110 controls the charging unit 200 under one charging condition if the number of times of charging is equal to or less than the last charging count in an even or odd numbered interval.

For example, the control module 110 charges the battery 400 for 3 hours at 0.1C / 2.4V under a set charging condition (C).

The present invention includes the above-described configuration. Hereinafter, a method of charging a sealed battery achieved by the above-described configuration will be described.

FIG. 2 is a flowchart illustrating a method of charging a sealed battery according to the present invention, and FIG. 3 is a table showing an example of a turn interval and setting conditions in step S100 of the present invention.

Referring to FIGS. 2 and 3, a method for charging a sealed battery according to the present invention includes dividing a cumulative number of times of charging into a plurality of time periods, calculating a time difference between odd- A step S100 of setting a charging condition according to a rotation interval, a step S200 of sensing whether a charger is connected or charged, a step S300 of checking counting information including an accumulated charging count, If it is the last charge of the set rotation interval, charging according to the set conditions.

The step S100 is a step of setting a time interval according to the number of times of charging the battery 400, and setting the number of times of charging and charging conditions in the time interval.

The turn intervals may be set separately as the interval of the accumulated charge counts, and the first charge condition and the second charge condition may be set after finer division as the even-numbered difference and the full-aberration interval. This will be described with reference to FIG.

Referring to FIG. 3, the control module 110 sets the first-time interval to 10 times of charging from the first one-time charging unit 200 to the first interval, sets the interval from the 11th interval to the 20th interval to the second interval, The interval is set to the number of times of accumulation such as the third time interval from the time of the first to the 30th.

At this time, the control module 110 sets the charging condition of one charge (C) of the charge section 400 and the charging condition of the last number of times in the odd-numbered phase difference section and the even-phase difference section. For example, the single-charge condition (C) is set to 0.1 C / 2.4 V so that the charge current is charged at 0.01 C for only 3 hours.

The first charging condition (A) and the second charging condition (B) are alternatively selected depending on whether the odd-numbered interval or the odd-numbered interval exists, .

For example, the control module 110 charges one time charging condition (C) from 1 to 9 times in the first rotation interval set by one to ten cycles, and charges it in the first charging condition (A) . Thereafter, charging is performed in one charging condition up to 11-19 times, and 20 times in the second charging period is charged in the second charging condition (B).

That is, the control module 110 applies the first charging condition A and the second charging condition B alternately for the last charging period and the remaining charging condition except for the last charging is one charging condition C Respectively.

Here, the first charging condition (A) may be an IUIa charging method as a method of alternately charging a voltage and a current. That is, the IU section is charged to 0.1C / 2.4V until the charging current reaches 0.01C, and when the charging current reaches 0.01C, it is charged for 2 hours as the constant current in the section Ia.

Further, the second charging condition (B) proceeds until the charging current reaches 0.01 C at 0.1 C / 2.4 V in the IU section, and when it reaches 0.01 C, it is charged at a constant current for 4 hours at 0.01 C in the Ia section.

In step S200, the control module 110 determines whether the charge unit 400 is charged. The control module 110 can determine whether the external power is supplied through the charging unit 200 and / or whether the charging command is output from the switch 160.

In step S300, the control module 110 confirms information on the accumulated number of times of charging from the counting module 140 until now. The control module 110 confirms the accumulated number of times of charging from the counting module 140, adds 1 to the accumulated number of times of charging, and confirms the time interval including the calculated number of times of charging.

Step S400 is a step of charging the battery unit with the charging condition set for each of the calculated number of times of charging and the interval of the cycle. The charging step S410 includes charging at one charging condition (C) and charging at the first charging condition (A) B). ≪ / RTI >

Step S410 is a step of controlling the charging unit 200 so that the control module 110 is charged with one charging condition (C) when the control module 110 corresponds to charging before the last charging time in each rotation interval. Here, the control module 110 controls the charging unit 200 to charge the charging unit 200 in a single charging condition (C) if the number of charging times accumulated in the counting module 140 is not the last charging time set for each time interval.

That is, the control module 110 charges the battery 400 with the voltage set for a predetermined time.

In step S420, if the accumulation number of times accumulated in the control module 110 corresponds to the last number of times of the odd-numbered or even-numbered period, And controls the charging unit 200 to charge the battery. This will be described with reference to FIG.

4 is a flowchart showing the step S420 in the present invention.

Referring to FIG. 4, step S420 includes steps S421 to S412, step S442 to output a voltage for each setting interval, step S423 to determine whether the charging current of the battery 400 has reached the preset capacity, Charging the battery with a constant current for a set time when the charging current reaches the set capacity, determining whether the set time has elapsed, and turning off the charging when the set time has elapsed.

In step S421, the control module 110 checks the present round trip interval based on the cumulative charge count of the counting module 140. [ That is, the control module 110 selects the first charging condition (A) and the second charging condition (B) by checking the rotation interval.

In step S422, the control module 110 controls the charging unit 200 to output the voltage according to any one of the first charging condition A and the second charging condition B set for each cycle interval. The charging unit 200 converts the power input through the charger 500 under the control of the control module 110 to charge the charging unit 400. [

In step S423, the control module 110 determines whether the charge current of the battery 400 has reached the preset capacity. For example, the control module 110 charges at 0.1 C / 2.4 V and receives the sensing signal of the sensing module 120 to confirm that the charging current of the charge section 400 reaches 0.01C.

In step S424, if the charging current of the battery 400 reaches the preset capacity, the control module 110 charges the battery 400 as a constant current for a set time. Here, it is preferable that the set time is set differently according to the first charging condition (A) and the second charging condition (B). For example, the first charging condition A charges the battery 400 as a constant current for 2 hours, and the second charging condition B charges the battery 400 with a constant current for 4 hours.

In step S425, the control module 110 determines whether a predetermined time has elapsed through the time counted by the timer 130. [ That is, the control module 110 determines whether four hours have elapsed in the case of the first charging condition A, for example, two hours or the second charging condition B, for example.

In step S426, the controller module 110 controls the charger 200 to turn off the charging of the charger 400 when the set time has passed. That is, the control module 110 does not control the charging unit by detecting the amount of change in the discharge depth (DOD) of the battery unit 400 or the amount of change in the charge state (SoC: STATE OF CHARGE) The battery 400 is charged through the accumulated number of times of charging and the time set for each time interval.

In addition, the sensing module 120 senses a variation in discharge depth or charging state of the battery 400 and outputs the sensed amount to the control module 110. At this time, the control module 110 outputs the discharge depth or the charged state determined through the sensing signal of the sensing module 120 through the display module 150.

Here, the control module 110 does not accumulate the number of times of charging if charging has not been performed for the set time.

Or the control module 110 determines that the charge state SoC of the battery unit 400 has reached the set value (for example, 80% or more) even if the charge has not been performed for the set time, Can be accumulated.

As described above, according to the present invention, the charge time of the charge unit 400 is shortened from a long term viewpoint rather than the short term view, and the capacity of the charge current is sensed per specific number of times of the charge interval accumulation period By setting a section for charging with a constant current, it is possible to prevent overcharging and to prevent aging due to long time charging of the battery unit 400, thereby prolonging the service life.

It will be apparent to those skilled in the art that various modifications and variations may be made in the present invention.

Therefore, it is to be understood that the present invention is not limited to the above-described embodiments. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims. It is also to be understood that the invention includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the appended claims.

100: control unit 110: control module
120: detection module 130: timer
140: Counting module 150: Display module
160: Switch 200:
300: Discharge part 400: Whole branch

Claims (7)

A battery which is composed of a hermetically sealed battery housing an electrolyte of a gel type (GEL TYPE) and is charged and discharged;
A charger for converting an external power source output through a charger into a predetermined power source to charge the battery unit;
And a control unit controlling the charging unit to charge the battery unit by controlling the charging unit according to a set charging condition,
The control unit
And sets a plurality of time intervals that are divided into at least one charge number,
And sets the charging condition to be charged for a set time as a constant current when the charged capacity reaches the set capacity.
The apparatus of claim 1, wherein the control unit
A counting module for counting and accumulating the number of times of charging of the battery unit;
A sensing module for sensing the charging current of the battery and the output voltage and current of the charging unit;
A display module for visually outputting at least one of the accumulated number of times of charge, the depth of discharge and the state of charge in the counting module; And
A control module for checking a cumulative number of times of charging of the counting module to check a time interval to which the current number of times of charging belongs and for controlling the charging unit to charge the battery unit if the number of times of charging corresponds to the last number of charging times in each time interval; And a charging system for charging the battery.
The method according to claim 1,
Wherein the charging is performed in one charging condition in each of the remaining charges not corresponding to the last charging time in the rotation interval, and the one charging condition is charged for a preset time.
The method according to claim 1, wherein the time to charge the constant current in the charging condition is
Wherein the time set in the previous cycle section is different from the time set in the next cycle section.
a) accumulating the number of times of charging and dividing the accumulated number of times of charge into a plurality of number of rotation intervals, and if the last charging of the odd numbered rotation interval is the first charging condition and the last charging of the even numbered rotation interval, Setting a charging condition to be as small as possible;
b) checking a cumulative number of charging times and a counting interval when a charger for supplying a charging power is connected to a battery unit including cells sealed in a gel type electrolyte; And
c) if the current charge is the last charge of the odd-numbered turn interval period, or if the current charge is the last charge of the even-numbered turn interval period, And charging the sealed battery.
6. The method of claim 5, wherein step a)
Wherein the first charging condition is set to be charged for one time each charging other than the last charging time, and the one charging condition is charged for a preset time.
6. The method according to claim 5, wherein the first charging condition and the second charging condition are
The charging current is charged to a set voltage until the charging current of the battery reaches the set capacity, and when the charging current reaches the set capacity,
The set time
Wherein the first charging condition and the second charging condition are set differently according to the first charging condition and the second charging condition.

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