KR102014719B1 - Battery life management device - Google Patents

Abstract

The battery life management apparatus includes a battery for supplying power to at least one load having a constant power consumption in a discharge mode, a current measuring unit measuring a current between the battery and the load device, and a voltage of the battery. Voltage measurement unit, a power measurement unit for measuring the power consumption of the battery, and the data measured by the current measurement unit, the voltage measurement unit and the power measurement unit in real time to monitor the data measured based on time And it characterized in that it comprises a battery monitoring unit for controlling to store and display the measured data on the display device.

Description

Battery power management and life management device {Battery life management device}

The present invention relates to a battery management device, and more particularly, to a battery life management device for predicting and warning the battery life.

Industrial batteries, which consist mainly of lead-acid batteries, have been used in a limited number of devices for emergency power supply (UPS, etc.). In recent years, the growth of the battery market for special equipment used in electric forklifts and excavators is growing.

In addition, with the advent of various mobile devices such as smartphones and tablet PCs, as the number of small wireless base stations for mobile data processing increases, the demand for industrial batteries used in the base stations is greatly increasing.

In addition, batteries consisting of lead acid batteries and lithium batteries are used in hybrid cars, which are at the center of next-generation green growth, and lead acid batteries market continues to grow as lead storage batteries are used in the solar power and wind power industries as well as the Smart Grid business. It is expected to do.

As a result of the expansion of the secondary battery market, that is, batteries composed of lead acid or lithium batteries, technologies related to battery management systems (BMS) installed in electric vehicles, electric scooters, solar energy storage devices, etc. Product development is active.

After two to three years of normal use, the battery lasts less than half, requiring a battery that lasts five hours on a single charge to recharge every two hours. do.

Batteries made of lithium batteries or lead acid batteries have the advantage of maintaining a stable voltage output, but the battery life is dramatically shortened during overcharge / over discharge. In particular, if the over-discharge state persists, it is fatal to the battery life.

In particular, since the life of the battery may be shortened depending on the stability of the power supplied from the charger, a technology for stably controlling the charging DC power supplied from the battery charger is required.

In general battery chargers, a plurality of battery packs are connected in parallel to perform charging and discharging.

Therefore, when charging multiple batteries at the same time, the charging current must be high, and the charging time also takes a long time to fully charge when charging with a constant current.

In particular, since it takes a long time to fully charge a plurality of batteries that have been over-discharged, there is a case where the standby time becomes long until the battery can be supplied with power after charging, and thus the battery cannot be used for a long time. In the case of overdischarge, not only does it take longer to fully charge, but also shortens the cycle of the entire battery, thereby shortening the replacement cycle.

In addition, in the serial charging method, charging and discharging are separated so that charging and discharging cannot be performed simultaneously. In other words, after the charge is completed, the switch can be discharged by operating the switch, and some batteries cannot be selected and individually discharged.

On the other hand, when managing a large number of batteries, it is necessary to know the life of the battery in advance and replace it with a new battery at an appropriate time so that it does not interfere with continuous operation of the equipment.

However, the conventional battery management system uses the method of estimating the life of the lead-acid battery by estimating the concentration of the electrolyte, or determining the replacement cycle in consideration of the life specified in the battery specification. It has a hard disadvantage.

KR 10-2014-0051881 A

The present invention has been proposed to solve the above technical problem, grasping the change value (ΔV) of the battery voltage according to the power consumption (Wh) by time under a constant discharge condition and the degree of aging of the battery based on the difference in the change rate It provides a battery life management device that can be identified.

In addition, the present invention provides a battery life management device that senses the voltage of each of the plurality of batteries in real time and controls each battery to operate in the charging mode or the discharge mode based on the discharge completion voltage and the full charge voltage.

According to one embodiment of the present invention for solving the above problems, a battery for supplying power to at least one load having a constant power consumption in the discharge mode, and the current measurement to measure the current between the battery and the load device And a voltage measuring unit measuring a voltage of the battery, a power measuring unit measuring a power consumption of the battery, and data measured by the current measuring unit, the voltage measuring unit, and the power measuring unit in real time. A battery life management device including a battery monitoring unit for receiving and monitoring and storing measured data based on time and displaying the measured data on a display device is provided.

The battery monitoring unit included in the present invention may control to output a warning from a time point when the power consumption for one day exceeds a preset first reference power consumption, and the second reference power consumption greater than the first reference power consumption. It is characterized in that the control to block the battery discharge from the time exceeding, or to give an additional amount of power in consideration of the reserve amount of power.

The battery monitoring unit included in the present invention, in grasping the reference performance data of the newly installed battery to a predetermined reference period, changes in the battery voltage according to the power consumption amount (Wh) under a constant discharge condition generated by the load The value ΔV is identified by time and stored as the reference performance data, and after the reference period, the change rate ΔV of the battery voltage according to the power consumption Wh is determined by time and compared with the reference performance data, and the change rate is Based on the difference of the aging degree of the battery is characterized.

The battery monitoring unit included in the present invention, in grasping the reference performance data of the newly installed battery to a predetermined reference period, changes in the battery voltage according to the power consumption amount (Wh) under a constant discharge condition generated by the load The value ΔV is determined for each time, and the change value ΔV of the battery voltage relative to the power consumption amount Wh and the power use time relative to the change value ΔV of the battery voltage are calculated and stored as the reference performance data. Even after the reference period, the change value (ΔV) of the battery voltage compared to the power consumption amount (Wh) and the power usage time of the change value (ΔV) of the battery voltage are calculated and compared with the reference performance data, and based on the difference in the change rate of the battery. Characterize the degree of aging.

The battery monitoring unit included in the present invention includes the change rate of the power consumption time compared to the change value ΔV of the battery voltage and the change value ΔV of the battery voltage after the reference period, and the reference performance data. In contrast, when all have a performance of 50% or less, it is characterized in that it is determined as a first replacement necessary state according to the aging of the battery.

The battery monitoring unit included in the present invention further calculates a change rate of the discharge current amount (mAh) relative to the power use time and a change rate of the power consumption amount (Wh) compared to the power use time, and in the state determined as the first replacement necessary state. When the change rate of the power consumption amount (Wh) compared to the power usage time exceeds twice the change rate of the discharge current amount (mAh) compared to the power usage time, it is determined that the secondary replacement need condition according to the aging of the battery do.

Battery life management apparatus according to an embodiment of the present invention, under a constant discharge condition to determine the change value (ΔV) of the battery voltage according to the power consumption (Wh) over time and determine the degree of aging of the battery based on the difference in the change rate have.

Therefore, a separate equipment such as an electrolyte meter is not required, and the age of the battery can be determined by grasping the current between the battery and the load device, the voltage of the battery, and the amount of power consumed by the battery.

In addition, the battery life management device detects the voltage of each of the plurality of batteries in real time, it is possible to control each battery to operate in the charging mode or discharge mode on the basis of the discharge completion voltage and the full charge voltage. Therefore, it is possible to extend the use time of the battery and to ensure the operation continuity of the device operating by using the battery power.

1 is a block diagram of a battery life management device 1 according to an embodiment of the present invention.
2 is a configuration diagram of the battery life management device 1 of FIG.
3 is a view showing a display device of the battery life management device 1 of FIG.
4 is another configuration diagram of the battery life management device 1
5 is a detailed configuration diagram of the battery life management device 1 of FIG.
6 is a first flowchart illustrating an operation process of the battery life management apparatus 1 of FIG. 4.
FIG. 7 is a second flowchart illustrating an operation process of the battery life management apparatus 1 of FIG. 4.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings so that those skilled in the art may easily implement the technical idea of the present invention.

1 is a block diagram of a battery life management device 1 according to an embodiment of the present invention, Figure 2 is a block diagram of the battery life management device 1 of FIG.

The battery life management apparatus 1 according to the present embodiment includes only a brief configuration for clearly describing the technical idea to be proposed.

1 and 2, the battery life management apparatus 1 includes a solar panel 10, a charger 20, a multi charge / discharge control unit 30, a plurality of batteries 40, and a current measurement unit ( 100), the voltage measuring unit 200, the power amount measuring unit 300 and the battery monitoring unit 400 is configured to include.

Looking at the detailed configuration and the main operation of the battery life management device 1 configured as described above are as follows.

First, the connection operation of the plurality of batteries 40, the current measuring unit 100, the voltage measuring unit 200, the power amount measuring unit 300, and the battery monitoring unit 400 will be described in detail, and the solar panel 10 will be described. And the description of the charger 20 and the multi-charge and discharge control unit 30 will be described later.

In the present embodiment, assuming that the temperature is constant, the operation of the battery life management apparatus 1 will be described. According to an exemplary embodiment, the battery life management apparatus 1 may further include a temperature sensing unit. When the temperature sensing unit is further included, the battery life management apparatus 1 may be configured to correct the measured data according to the sensed temperature value.

The battery 40 supplies power to at least one load device 50 having a constant power consumption in the discharge mode.

The battery 40 may be defined as a rechargeable rechargeable battery or a lithium ion battery, and the load may be defined as a motor, a household electronic device, an industrial electronic device, a portable device, a base station device, or the like.

The current measuring unit 100 measures the current between the battery 40 and the load device 50, the voltage measuring unit 200 measures the voltage of the battery 40. In addition, the power amount measurement unit 300 measures the power consumption of the battery 40.

The battery monitoring unit 400 receives data measured by the current measuring unit 100, the voltage measuring unit 200, and the electric power measuring unit 300 in real time, monitors and stores the measured data based on time, and measures To display the data on the display device.

First, the battery monitoring unit 400 controls to output a warning from a time point when the power consumption amount Wh for one day exceeds a preset first reference power consumption amount Wh.

Next, the battery monitoring unit 400 controls to cut off the battery discharge from the time point when the second reference power consumption (Wh) greater than the first reference power consumption (Wh), or in consideration of the reserve power amount of additional power amount Can be controlled.

In addition, the battery monitoring unit 400 grasps the reference performance data STD_DATA of the newly installed battery 40 to a predetermined reference period STD to grasp the performance index. Here, the predetermined reference period STD may be defined as a period within 10 days from when a new battery is installed and used, and a week may be set as a most suitable period.

That is, the battery monitoring unit 400 grasps the change value ΔV of the battery voltage according to the power consumption Wh according to time under a constant discharge condition generated by the load device 50 and stores it as reference performance data STD_DATA. do.

At this time, it is assumed that the power consumption W of the load device 50 is constant. That is, in general, a system using a battery is designed in consideration of the power consumption (W) of the load device 50. In this embodiment, the power consumption (W) consumed by the load device 50 is always constant in a normal state. If the deviation occurs, it is defined as not exceeding 15%. In addition, it is most preferable to measure the change in the battery voltage until immediately before the discharge end voltage.

The battery monitoring unit 400 is equipped with a new battery and grasps the performance indicators, that is, the reference performance data STD_DATA by grasping the change value ΔV of the battery voltage according to the power consumption Wh even after the reference period STD. ) And determine the degree of aging of the battery based on the difference in the rate of change.

That is, the battery monitoring unit 400 grasps the reference performance data STD_DATA of the newly installed battery 40 to a predetermined reference period STD.

Under the constant discharge conditions generated by the load device 50, the change value (ΔV) of the battery voltage according to the power consumption amount (Wh) is identified for each time, and the change value (ΔV) of the battery voltage relative to the power consumption amount (Wh), The power usage time with respect to the change value ΔV of the battery voltage is calculated and stored as the reference performance data STD_DATA. For reference, the power consumption amount Wh relative to the change value ΔV of the battery voltage may be calculated and used as reference performance data STD_DATA instead of the change value ΔV of the battery voltage relative to the power consumption Wh.

At this time, the battery monitoring unit 400 calculates the change value (ΔV) of the battery voltage compared to the power consumption amount (Wh) and the power usage time compared to the change value (ΔV) of the battery voltage even after the reference period STD, and then the reference performance data ( STD_DATA) to determine the degree of aging of the battery based on the difference in the change rate. At this time, it is desirable to determine the degree of aging for a period of about 7 to 10 days.

The battery monitoring unit 400 has a change rate of the power consumption time compared to the change value (ΔV) of the battery voltage compared to the power consumption amount (Wh) after the reference period (STD) and the reference performance data (STD_DATA). When all have less than 50% of performance, it is determined that the first replacement state is necessary due to the aging of the battery.

The performance of 50% or less in comparison to the reference performance data (STD_DATA) is less than 50% of the performance performance (STD_DATA) that the battery 40 is aged and identified for a predetermined reference period (one week). Means that. Therefore, the criterion for determining the need for the first replacement may be set based on a performance deterioration criterion of 60% or less. In the present embodiment, the criterion is described based on 50%.

Meanwhile, the battery monitoring unit 400 may further calculate a change rate of the discharge current amount mAh relative to the power use time and a change rate of the power consumption amount Wh relative to the power use time. The change rate is calculated based on the reference performance data STD_DATA for the predetermined reference period STD. In this case, it is preferable to determine the degree of aging for a period of about 7 to 10 days.

That is, when the battery monitoring unit 400 determines that the first replacement state is necessary, when the change rate of the power consumption amount Wh compared to the power use time exceeds twice the change rate of the discharge current amount mAh relative to the power use time. As a result, it is determined that the secondary replacement is required due to the aging of the battery 40.

In other words, the rate of change of the power consumption Wh compared to the power usage time is more than twice the change rate of the discharge current amount mAh compared to the power usage time, which means that the power consumption Wh decreases significantly compared to the power usage time. You can do that, which means you don't really do a lot of work, so you can estimate battery aging.

That is, the battery monitoring unit 400 may control to output a warning even in a state in which a first replacement need state occurs, and may output a warning that the battery aging state is very serious when a second replacement need state additionally occurs.

3 is a diagram illustrating a display device of the battery life management apparatus 1 of FIG. 1.

Referring to FIG. 3, the display device may be configured as a flat panel display device, and the data calculated by the battery monitoring unit 400, the current measuring unit 100, the voltage measuring unit 200, and the power amount measuring unit 300. You can display the data sent by.

In addition, the display device may display the daily power consumption Wh, the cumulative power consumption, the excess power consumption, and the like used by the load device 50.

In addition, since the display device may display data calculated by the battery monitoring unit 400, the display device may display the performance degradation value of the battery 40 in comparison with the reference performance data STD_DATA. In addition, the degree of aging of the battery may be displayed in units of%.

As described above, the battery life management device 1 sets the amount of power consumption to be used per day to shut off or warn when excessive power consumption occurs. That is, the battery capacity is designed in consideration of the power consumption to use, so when over-consumption occurs, the battery overdischarges and can shorten the lifespan. Therefore, the power consumption is set according to the design value by setting the daily power consumption.

In addition, the battery life management device 1 measures the daily power consumption. In other words, it can monitor the power consumption by identifying the power consumption by the power consumed by the battery and displaying the accumulated usage.

In addition, the battery life management device 1 constantly measures the charge and discharge voltage and current of the battery to monitor the variation of the battery voltage according to the amount of power consumption when using the load.

In addition, the battery life management device 1 measures the battery discharge time (measures the time to use power). That is, by measuring the change in the discharge time of the battery according to the power consumption so that the amount of change in the long time use of the battery can be compared. That is, the amount of change compared to the initial required time is measured by comparing the discharge time of the battery initially installed with the discharge time of the battery used for a long time under the same discharge condition.

In addition, the battery life management device 1 compares the discharge voltage and time of the battery according to the power consumption, and sets the amount of power that can be consumed daily according to the design.

A. Initial (installation) Power Consumption & Battery Voltage Variation Check-(Standard Period: Example 7 days)-
1.Check battery voltage at initial installation
2. Check battery voltage at initial power consumption
3. Record the voltage variation of battery (reference value)
4. Record power consumption (day) (reference value)
=> Battery voltage fluctuation record according to power consumption (reference value)

B. Power Consumption & Battery Voltage Variation after Time Check-(Standard Period: Yes 7 days)-
1. Daily Battery Voltage Check
2. Check battery voltage when daily power consumption occurs
3. Daily record of battery voltage variation
4. Daily power consumption record
=> Record battery voltage fluctuation according to daily power consumption

Referring to Table 1 and Table 2, the variation in battery voltage according to the power consumption based on "A" is the reference value (100%) as time "B" as time goes by. It shows the change of battery according to the power consumption compared to the reference value, and it shows the change of% as time passes for the change compared to 100% at the initial installation to predict the life of the battery.

In this way, the daily power consumption and the cumulative power consumption can be managed to understand the power usage effect of the system, and the daily change of the battery voltage can be managed to predict and manage the life of the battery to facilitate maintenance and repair.

When the operation procedure of the battery life management device 1 described above is described in order, it can be summarized as follows.

1st: Voltage fluctuation compared to power consumption

1) Standard: Initial value is set as average data for a certain period of time after installation (eg 7 days)

2) Measurement of change amount according to fluctuation range after completion of standard setting

-Calculate the amount of change in voltage fluctuation according to the power consumption compared with the reference value

-Comparison based on voltage width up to battery low voltage setting

-If the voltage variation is less than 50% of the power consumption, the voltage variation is greater than the use of the same power consumption.

 Secondary: Power Consumption Time (Discharge Time)-Comparison of Voltage Variation

 1) Standard: Initial value is set as average data for a certain period of time after installation (eg 7 days)

 2) Power consumption time

-Compares the change in battery voltage and the change in power consumption when compared to the reference time.

-If the voltage variation is less than 50% compared to the standard, the voltage variation is larger than the power usage time, so the battery life is expected to be shortened because it discharges quickly.

3rd: When voltage fluctuation and time_voltage fluctuate compared to power consumption

-Battery life is expected to shorten battery life by less than 50% of standard, warning that can analyze factors that may affect battery replacement time or lifespan.

4th: Discharge time warning by using abnormal current or over current

1) Standard: Initial value is set as average data for a certain period of time after installation (eg 7 days)

2) Warning of the effect of shortening the use time due to overcurrent when the time is greater than 1 by comparing the current value with the reference value based on time (check points or load use check required)

5th: Warn by comparing time against current and current_time_power

<Change rate of discharge current amount (mAh) compared to power usage time and change rate of power consumption amount (Wh) compared to power usage time>

1) Standard: Initial value is set as average data for a certain period of time after installation (eg 7 days)

2) When the difference is more than doubled by comparing the calculated values with each other (when the change rate of the power consumption amount (Wh) compared to the power usage time exceeds twice the change rate of the discharge current amount (mAh) compared to the power usage time) Over discharge or battery replacement, maintenance and repair should be checked.

Finally, when the 3rd and 5th results are simultaneously alerted, the battery life is reduced to 50% or less, so it is necessary to check the replacement time.

4 is another configuration diagram of the battery life management apparatus 1.

Referring to FIG. 4, the battery life management apparatus 1 includes a solar panel 10, a charger 20, a multi charge / discharge control unit 30, a plurality of batteries 40, a current measurement unit 100, It is configured to include a voltage measuring unit 200, power amount measuring unit 300 and the battery monitoring unit 400.

Looking at the detailed configuration and the main operation of the battery life management device 1 configured as described above are as follows.

Overlapping descriptions of the current measuring unit 100, the voltage measuring unit 200, the power measuring unit 300, and the battery monitoring unit 400 are omitted, and the solar panel 10, the charger 20, and the multi A detailed configuration of the charge / discharge control unit 30 and the plurality of batteries 40 will be described in detail.

The multi charge / discharge control unit 30 senses the voltage of each of the plurality of batteries 40 in real time, and controls each battery to operate in the charging mode or the discharge mode based on the discharge completion voltage and the full charge voltage.

The charger 20 selectively transfers the charging power transmitted from the solar panel 10 to the plurality of batteries 40 under the control of the multi charge / discharge control unit 30.

The multi charge / discharge control unit 30 rapidly charges only one battery selected from the plurality of batteries 40 in the priority charging mode.

In addition, the multi charge / discharge control unit 30 electrically cuts off the connection to the plurality of batteries 40 after a predetermined time from when all the batteries are stopped, thereby reducing the consumption of standby power.

In addition, the multi charge / discharge control unit 30 charges at least one or more batteries below the discharge complete voltage among the plurality of batteries 40, and performs a control operation of switching at least one or more batteries having reached the full charge voltage to a discharge standby state. Run

Here, the low battery voltage (LBV) is defined as the reference voltage at which the battery should start charging, and the high battery voltage (HBV) is the battery that is fully charged to discharge (use battery power). Is defined as the voltage present.

5 is a detailed configuration diagram of the battery life management apparatus 1 of FIG. 4, FIG. 6 is a first flowchart illustrating an operation process of the battery life management apparatus 1 of FIG. 4, and FIG. 7 is a battery life of FIG. 4. 2 is a flowchart illustrating an operation process of the management device 1.

The operation of the battery life management apparatus 1 will now be described with reference to FIGS. 5 to 7.

The multi charge / discharge control unit 30 of the battery life management device 1 includes a voltage detector 31, a charge control signal generator 32, a battery selector 33, a discharge selector 34, And a charge / discharge control unit 35.

Increasing power usage or using a plurality of battery packs 40 according to the capacity of the photovoltaic facility, the configuration of the plurality of battery packs 40 are connected in series and parallel.

By dividing the plurality of battery packs 40 by channel, one charger 20 is configured to sequentially charge the plurality of battery packs 40, or optionally, to simultaneously charge the entire battery packs 40 in parallel. .

In addition, the discharging causes the battery pack that is fully charged to the set voltage (HBV) to be prioritized to distinguish channels of the battery pack so that a plurality of battery packs can be fully charged without being simultaneously discharged.

Only one channel of the plurality of separated battery pack channels is discharged first, and the remaining channels are switched to a standby state capable of discharging when the battery is being charged or fully charged. When the battery pack channel being discharged reaches the set voltage LBV, the battery pack channel is automatically switched to the charging mode, and at the same time, after the charging is completed, the battery pack channel is discharged to another channel that is in the standby state for discharging.

The voltage detection unit 31 is capable of setting the voltage at the time of over-discharge and overcharging-low battery voltage (LBV) or full battery voltage (HBV)-and if the set voltage is confirmed, the control signal Create and pass The voltage sensing unit 31 displays the voltage, and can be confirmed by using a warning or a light emitting device (LED) during overdischarge.

The charging control signal generator 32 outputs a control signal to sequentially control the charging progress of the plurality of batteries 40 according to the detection result of the voltage detector 31.

That is, when detecting a low battery voltage (LBV) signal is reached, the battery pack is charged to the channel part to be charged, and when the charge is complete, the control signal to switch to the standby state to be discharged Outputs At this time, when the arrival signal of the low battery voltage (LBV) is sequentially detected, the controller simultaneously charges or outputs a control signal to sequentially control charging for each channel.

The battery selector 33 is a switch that can select charging and discharging of a plurality of battery pack channels automatically / manually, and can arbitrarily block charging and discharging when switching manually. It can be selected to prevent the malfunction of the entire device or to replace it safely by manually blocking the battery pack when some channels occur (such as the battery's end of life). The battery selector 33 is automatically controlled by the voltage detector 31 and the charge control signal generator 32 in the automatic mode.

The discharge selector 34 controls discharge to be performed for each channel in a state in which each channel of the battery pack is fully charged. The battery pack channel in the fully charged state is in a standby state to be discharged. When the battery pack channel reaches the discharge complete voltage (LBV), the standby battery pack channel discharges sequentially. You will be controlled to proceed. That is, after blocking by over discharge, the battery in the fully charged standby state can be selected to continue to use the power. When it is switched to the state of charge due to over-discharge, it can minimize power consumption by self-power saving mode.

The charge / discharge control unit 35 selectively transfers power of the charger 20 so that each battery may perform a charging or discharging operation, or performs a switching operation so as to be in contact with a specific node.

Battery life management device 1 of the present invention can extend the charge and discharge cycle of the battery to achieve a reduction in the replacement cost of the battery according to a long time use. In addition, maintenance and repair costs can be divided into battery pack channels to distinguish the cost increase due to the overall replacement of the battery pack and the function offset due to the difference in capacity of the battery. The change in capacity due to deterioration can also be reduced to prolong the service life of the battery.

For reference, the charger 20 may generate DC power for charging by receiving DC power stored in the solar panel 10, or may generate DC power for charging by switching to high frequency when AC power is supplied.

When the charger 20 receives a high voltage AC power, a varistor and a fuse, an electromagnetic noise filter, an overcurrent limiting circuit, and the like may be disposed at an input terminal.

In particular, since the transistors and diodes of the rectifier circuit emit a lot of heat, heat sinks can be attached. In addition, when the element of the rectifier circuit is overheated, the amount of current may increase sharply and the rectifier circuit may be damaged, so that the maximum current value is limited based on the temperature value of the element included in the charger 20, in particular, the element of the rectifier circuit. do.

That is, the charger 20 adjusts the maximum amount of current that can be output based on the temperature value of the internal device in adjusting the maximum amount of current of the generated charging DC power.

The charger 20 controls to output the maximum amount of current (rated current) that can be generated when the temperature value of the internal device is below the reference temperature, and responds to the increase in temperature when the temperature value of the internal device is above the reference temperature. The operation of gradually reducing the maximum amount of current (rated current) that can be generated can be performed.

Although not shown in the drawing, a dummy battery cell may be arranged to check the charging performance. The charger 20 charges the dummy DC cells by supplying the charging DC power in the debug mode or the monitoring mode. That is, the charger 20 may detect the amount of change in the charging DC power while the dummy battery cell is being charged, and adjust the maximum amount of current of the charging DC power according to whether the amount of change exceeds the reference value.

That is, the charger 20 may check the charging state using the built-in dummy battery cell even when an external battery is not connected in the debug mode or the monitoring mode.

The charger 20 controls to gradually increase the maximum current amount when charging the dummy battery cell. At this time, the charger 20 continuously monitors the amount of change in the charging DC power (voltage and current) and records the result.

If the change amount is larger than the reference error value when the charging DC power supply rises, the charger 20 sets the current amount immediately before exceeding the reference error value as the maximum current amount.

For reference, the charger 20 is set to limit the maximum amount of current only when the amount of change in the charging DC power exceeds the reference error value three or more times while repeatedly charging / discharging the dummy battery cell at least 10 times. .

In addition, the charger 20 divides the current rising section of the charging DC power supply into a plurality of sections, and limits the maximum amount of current only when the amount of change of the charging DC power exceeds the reference error value three or more times in the same section. It may be set.

For example, after dividing into 0 ~ 1A ascending section (first section), 1 ~ 2A ascending section (second section), 2 ~ 3A ascending section (third section), 3 ~ 4A ascending section (fourth section) The amount of change in the charging DC power can be monitored. If the reference error value is exceeded more than three times in the third section, when the actual battery is charged, the amount of current in the second section is the maximum current of the charging DC power supply. Is set.

Meanwhile, the dummy battery cell may be configured to supply emergency power to the charger 20 and the multi charge / discharge control unit 30. That is, the power charged in the dummy battery cell may perform the function of the uninterruptible power supply.

For example, when an external AC power supply is suddenly cut off due to a power failure while charging an external battery, the dummy battery cell supplies emergency power to the charger 20 and the multi charge / discharge control unit 30 to supply the external battery. After further charging for a predetermined time, it is possible to provide a power source in which the charging operation can be stably stopped.

Since the power of the dummy battery cell is continuously supplied to the charger 20 and the multi charge / discharge control unit 30, when the external AC power is supplied again after the power failure, the charger 20 and the multi charge / discharge control unit 30 are out of power. In consideration of the state of charge immediately before the charging operation can proceed quickly.

For reference, the charger 20 and the multi charge / discharge control unit 30 may further include an active noise control unit, which may occur in a state of charging the battery or in a standby state after charging. The operation of canceling the high frequency audible noise may be performed.

That is, the active noise controller detects whether a noise corresponding to a preset audible frequency section (a human audible frequency) occurs and generates a control sound that cancels sound waves in the region when the noise occurs to block the noise.

Battery life management apparatus according to an embodiment of the present invention, under a constant discharge condition to determine the change value (ΔV) of the battery voltage according to the power consumption (Wh) over time and determine the degree of aging of the battery based on the difference in the change rate have.

Therefore, a separate equipment such as an electrolyte meter is not required, and the age of the battery can be determined by grasping the current between the battery and the load device, the voltage of the battery, and the amount of power consumed by the battery.

In addition, the battery life management device detects the voltage of each of the plurality of batteries in real time, it is possible to control each battery to operate in the charging mode or discharge mode on the basis of the discharge completion voltage and the full charge voltage. Therefore, it is possible to extend the use time of the battery and to ensure the operation continuity of the device operating by using the battery power.

As such, those skilled in the art will appreciate that the present invention can be implemented in other specific forms without changing the technical spirit or essential features thereof. Therefore, the above-described embodiments are to be understood as illustrative in all respects and not as restrictive. The scope of the present invention is shown by the following claims rather than the detailed description, and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included in the scope of the present invention. do.

10 solar panel
20: charger
30: multi charge and discharge control
40: battery
100: current measuring unit
200: voltage measuring unit
300: power measurement unit
400: battery monitoring unit

Claims (6)

A battery for supplying power to at least one load having a constant power consumption in a discharge mode;
A current measuring unit measuring a current between the battery and the load device;
A voltage measuring unit measuring a voltage of the battery;
A power amount measuring unit measuring the amount of power consumed by the battery; And
The battery monitoring unit receives data measured by the current measuring unit, the voltage measuring unit and the power measuring unit in real time, monitors and stores the measured data based on time, and displays the measured data on the display device. Including;
The battery monitoring unit, in grasping the reference performance data of the newly installed battery to a predetermined reference period, determines a change value ΔV of the battery voltage according to the power consumption Wh under a constant discharge condition generated by the load. It is determined by time and calculates the change value (ΔV) of the battery voltage compared to the power consumption amount (Wh) and the power usage time compared to the change value (ΔV) of the battery voltage and stores it as the reference performance data, but consumes the power after the reference period. (Wh) calculates the change value of the battery voltage (ΔV) and the power use time compared to the change value (ΔV) of the battery voltage and compare with the reference performance data, and determine the degree of aging of the battery based on the difference in the change rate The power consumption time of the change value ΔV of the battery voltage compared to the power consumption amount Wh after the reference period and the change value ΔV of the battery voltage When you have a ratio, the performance of both 50% or less to prepare for the performance data based on a determination by the primary replacement required conditions according to the aging of the battery,
The battery monitoring unit further calculates a change rate of the discharge current amount (mAh) with respect to the power use time and a change rate of the power consumption amount (Wh) with respect to the power use time, and determines that the first replacement state is necessary, compared to the power use time. When the change rate of the power consumption (Wh) is more than twice the change rate of the discharge current amount (mAh) compared to the power usage time, the battery life management device, characterized in that it is determined to be the secondary replacement necessary state according to the aging of the battery .
The method of claim 1,
The battery monitoring unit controls to output a warning from a time point when the power consumption for one day exceeds a preset first reference power consumption, and from a time when the second reference power consumption larger than the first reference power consumption is exceeded. Battery life management device characterized in that the control to block the discharge of the battery, or to provide an additional amount of power in consideration of the reserve amount of power. delete delete delete delete

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