KR101788513B1 - A Battery Management Apparatus for Uninterruptible Power Supply - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a battery management device for an uninterruptible power supply, and more particularly, to a battery management device for an uninterruptible power supply that enables a plurality of batteries to be automatically connected to a battery module. The battery management apparatus for an uninterruptible power supply unit is connected to at least one battery pack BP_1 to BP_L formed by connecting a plurality of batteries to each other to control a balance unit 11_1 to maintain each of the battery packs BP_1 to BP_L in a predetermined voltage state , 11_2, 11_L); A leakage current detection unit 13 for detecting a current of the battery packs BP_1 to BP_L; A switch module 12 for electrically opening and closing between the leakage current detection unit 13 and each of the battery packs BP_1 to BP_L; And a comparator 14 for comparing the currents flowing through the battery packs BP_1 to BP_L according to different voltages. And a control module 15 for judging the operation state of each of the battery packs BP_1 to BP_L from the detection information transmitted from the comparator 14. The balance units 11_1 to 11_L include respective battery packs BP_1 To BP_L can be switched to at least two different voltage states.

Description

[0001] The present invention relates to a battery management apparatus for an uninterruptible power supply,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a battery management device for an uninterruptible power supply, and more particularly, to a battery management device for an uninterruptible power supply that enables a plurality of batteries to be automatically connected to a battery module.

The uninterruptible power supply includes a plurality of batteries that are activated during a power failure, and the batteries electrically connected to each other need to be kept operable while being charged. However, due to various causes, a battery operation error may occur and the required power supply may not be provided. Therefore, the operating state of the battery forming the battery pack of the uninterruptible power supply needs to be detected in advance or during the operation. Patent Registration No. 10-1674636 discloses a battery monitoring system capable of detecting various errors that may occur during charging or discharging of a battery. In addition, Patent Registration No. 10-1608212 discloses an uninterruptible power supply having a battery management function for automatically checking whether a battery voltage, an internal temperature, or a normal operation state through a plurality of means.

The prior art has a problem in that it is difficult to detect various operating errors that cause operating errors of the battery, and it is difficult to detect operational errors caused by degradation of the battery, for example. The present invention has been made to solve the problems of the prior art and has the following purpose.

Prior Art 1: Patent Registration No. 10-1674636 (Scandinavia Krone, issued on November 4, 2016) Battery monitoring system of uninterruptible power supply Prior Art 2: Patent Registration No. 10-1608212 (Dainong Industrial Electric Co., Ltd., issued on April 01, 2016) Uninterruptible power supply with battery management function

It is an object of the present invention to provide a battery management device for an uninterruptible power supply that enables detection of operational errors of a plurality of batteries forming a battery module for operation of the uninterruptible power supply.

According to a preferred embodiment of the present invention, a battery management apparatus for an uninterruptible power supply comprises: a balance unit connected to at least one battery pack formed by connecting a plurality of batteries to each other to maintain each battery pack in a predetermined voltage state; A leakage current detection unit for detecting a current of the battery pack; A switch module for electrically opening and closing the leakage current detection unit and each battery pack; And a comparator comparing the currents flowing through the respective battery packs according to different voltages; And a control module for determining an operation state of each battery pack from the detection information transmitted from the comparator, wherein the balance unit is capable of converting each battery pack into at least two different voltage states.

According to another preferred embodiment of the present invention, the leakage current detection unit includes a unit leakage detection unit for detecting leakage of current between two different battery packs, and a module leakage detection unit for detecting current leakage of the battery module, Unit.

According to another preferred embodiment of the present invention, the contact detection unit further includes a contact detection unit that changes the contact state according to the operation temperature while being in contact with the electrode of each battery.

According to another preferred embodiment of the present invention, the different batteries forming each of the battery packs are connected by a connecting bracket, and the connecting bracket is formed into a strip shape having a thickness, and is provided with electrode contact portions formed on the front and rear surfaces, And a connection hole formed therein.

The battery management apparatus for an uninterruptible power supply according to the present invention detects the possibility of occurrence of an operation error or an operation error of each battery forming the battery module before or during the operation of the power source apparatus. In addition, the battery management apparatus according to the present invention enables detection of operational errors of various types of batteries generated in the battery module. For example, the battery management device enables such a battery to be replaced in advance, while allowing detection of an operating error due to deterioration of the battery.

FIG. 1 illustrates an embodiment of a battery management apparatus according to the present invention.
FIG. 2 illustrates an embodiment of a periodic detection structure applied to the battery management apparatus according to the present invention.
FIG. 3 illustrates an example of a structure for detecting an operation process error applied to the battery management apparatus according to the present invention.
FIG. 4 illustrates an embodiment of a battery module to which the battery management device according to the present invention is applied.
5 illustrates an electrode connection bracket for connecting different batteries in the battery management apparatus according to the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the embodiments shown in the accompanying drawings, but the present invention is not limited thereto. In the following description, components having the same reference numerals in different drawings have similar functions, so that they will not be described repeatedly unless necessary for an understanding of the invention, and the known components will be briefly described or omitted. However, It should not be understood as being excluded from the embodiment of Fig.

FIG. 1 illustrates an embodiment of a battery management apparatus according to the present invention.

Referring to FIG. 1, the battery management device for an uninterruptible power supply (UPS) is connected to at least one battery pack BP_1 to BP_L formed by connecting a plurality of batteries to each other so that each of the battery packs BP_1 to BP_L is in a predetermined voltage state Balance units 11_1, 11_2, and 11_L for maintaining the same; A leakage current detection unit 13 for detecting a current of the battery packs BP_1 to BP_L; A switch module 12 for electrically opening and closing between the leakage current detection unit 13 and each of the battery packs BP_1 to BP_L; And a comparator 14 for comparing the currents flowing through the battery packs BP_1 to BP_L according to different voltages. And a control module 15 for judging the operation state of each of the battery packs BP_1 to BP_L from the detection information transmitted from the comparator 14. The balance units 11_1 to 11_L include respective battery packs BP_1 To BP_L can be switched to at least two different voltage states.

The battery management apparatus may have a function of managing the operation states of battery modules BP_1 to BP_L connected in series or in parallel with a plurality of batteries or a battery module in which a plurality of battery packs BP_1 to BP_L are electrically connected to each other. The battery management apparatus monitors the charging and discharging processes, informs the replacement timing of the battery packs BP_1 to BP_L, and has a function of storing the manufacturing date of each battery or the number of times of charging / discharging. Specifically, the battery management apparatus may have a function of storing information on each battery and each of the battery packs BP1 to BP_L while detecting storage and operation states thereof. For example, when a predetermined number of times of charging or discharging are performed for the battery for which the number of times of charging / discharging has been determined, information on the charging / discharging can be transmitted to the management server 16 or another management device. The battery management apparatus may have a function of managing the overall state of the battery, but the function of detecting the state of the battery is described herein. However, the battery management apparatus according to the present invention may have various functions related to the management of the battery, and should not be understood to have only the functions described below.

The battery packs BP_1 to BP_L may be composed of a plurality of batteries connected in series or in parallel, and the plurality of battery packs BP_1 to BP_L may form a battery module serving as a power source of the uninterruptible power supply unit. The plurality of battery packs BP_1 to BP_L may be connected in parallel with each other at the same voltage. Balance units 11_1 to 11_L may be disposed in the respective battery packs BP_1 to BP_L.

Each of the balance units 11_1 to 11_L may include a plurality of capacitors, resistors, branch circuits, and switches, thereby maintaining each of the battery packs BP_1 to BP_L at a predetermined voltage state, . ≪ / RTI > Also, the different battery packs BL_1 to BL_P can be maintained at the same voltage. A switch may be provided between each of the balance units 11_1 to 11_L and the battery packs BP_1 to BP_L and may be connected to each other by a switch only during the operation test of each of the battery packs BP_1 to BP_L. After the test is completed, the balance units 11_1 to 11_L and the battery packs BP_1 to BP_L may be electrically disconnected by the operation of the switch. However, since it is advantageous that the voltage of each of the battery packs BP_1 to BP_L is kept constant during the operation, the balance units 11_1 to 11_L can function as a constant voltage circuit.

During the testing process of the battery packs BP_1 to BP_L, the different battery packs BP_1 to BP_L may be connected to each other or disconnected by the switch module. For example, the first and second battery packs BP_1 to BP_L may be connected to each other and the first and second balance units 11_1 and 11_2 may be held at the same or different voltages. The switch module 12 can connect two different battery packs (for example, BP_1 and BP_2) or a plurality of battery packs BP_1, BP_2 and BP_3 to each other, and the battery packs BP_1, BP_2 and BP_3, Can be maintained at the same or different voltage states by the corresponding balance units 11_1, 11_2, and 11_3. And the current flow between the battery packs 11_1 and 11_2 to 11_L that are the same or maintained at different voltages by the leakage current detection unit 13 can be detected. The current information detected by the leakage current detection unit 13 can then be transmitted to the comparator 14. [

The connection between the different battery packs BP_1 to BP_L is established by the switch module 12 so that the balance units 11_1 to 11_L can be maintained in the same or different voltage states. The leakage current detection unit 13 can detect the flow of current in each connection or disconnection state and transmit information on the connection state, voltage and current to the comparator 14. [ The comparator 14 can compare the theoretical current value and the detected current value between the different battery packs BP_1 to BP_L in the set voltage state. Then, current values between different battery packs BP_1 to BP_L are compared under various voltage conditions, and data on the current values can be transmitted to the control module 15. Then, the control module 15 analyzes the value transmitted from the comparator 14 and can refer to whether the battery packs BP_1 to BP_L are normal or not. For example, leakage current may be generated in the battery packs BP_1 to BP_L due to internal resistance due to deterioration under different voltage conditions. The voltage of each of the balancing units 11_1 to 11_L may be formed by an appropriate external power supply and each of the balancing units 11_1 to 11_L may be maintained in a predetermined voltage state by a device such as a capacitor as described above have. In accordance with the error of the current measured by the leakage current detecting unit 13 with respect to the theoretical value or the error with respect to the standard current while the balance units 11_1 to 11_L are maintained at the predetermined voltage, ) Can be judged whether or not it is normal. For example, the control module 15 can determine whether or not the error value is within the allowable range based on information such as the life of the battery, the date of manufacture, or the number of charge / discharge cycles. At the same time, it can be judged whether such an error can cause an operation failure in the uninterruptible power supply.

The control module 15 can control the entire operation or testing process of the battery packs BP_1 to BP_L and can control the operation of the switch module 12 or the process of transmitting the information of the comparator 14, for example. It is also possible to determine whether or not each of the battery packs BP_1 to BP_L is normal based on the information transmitted from the comparator 14. [ The determined information may be transmitted to the management server 16 that manages the uninterruptible power supply. If there is a possibility of occurrence of an error, the control module 15 can transmit relevant information to, for example, a portable electronic device having a management authority. A display screen can be installed as needed to display detection conditions, detection information and results.

As described above, the current flows can be detected by the leakage current detection unit 13 while the respective battery packs BP_1 to BP_L are maintained at various voltage conditions by the balance units 11_1 to 11_L. Different battery packs BP_1 to BP_L can be connected by the switch module 12 in various ways, and the flow of currents can be detected accordingly. The deterioration state or connection state of the battery may be detected or an operation error of the battery may be detected according to the detection result.

The control module 15 can set the balance units 11_1 to 11_L to various voltage states as necessary and the control module 15 can check whether the battery packs BP_1 to BP_L are in a normal state based on various information And is not limited to the embodiments shown.

FIG. 2 illustrates an embodiment of a periodic detection structure applied to the battery management apparatus according to the present invention.

Referring to FIG. 2, the leakage detection unit and the switch module may be made in various forms, and the leakage detection unit may include unit leak detection units 21_1 to 21_L that detect current leakage between two different battery packs BP_1 to BP_L And a module leakage detection unit 22 for detecting a leakage current of a battery module composed of a plurality of battery packs BP_1 to BP_L.

The different battery packs BP_1 to BP_L may be formed to have the same voltage, for example, a plurality of batteries B1 to BK having the same voltage may be connected to each other in the same manner. For example, the three batteries B1, B2, and B3 may be connected to each other in parallel or in series. Accordingly, the battery packs BP_1 to BP_L can be maintained at the same voltage state, and the unit leak detection units 21_1 to 21_L can be disposed between two different battery packs (for example, BP_1 and BP_2). Resistors R1 and R2 may be arranged in parallel with the unit leak detecting units 21_1 to 21_L. Unit resistance R having a predetermined value is connected to each of the unit leak detecting units 21_1 to 21_L and each of the unit leak detecting units 21_1 to 21_L may include a unit switch, . ≪ / RTI >

The opening and closing of each unit switch can be controlled by the control module 24, and the unit leak detecting units 21_1 to 21_L can be adjusted as necessary. A current is detected in the resistors R1 and R2 connected in parallel, or a voltage of a capacitor in which no current flows in the resistors R1 and R2 connected in parallel can be detected. Alternatively, a current flowing through the unit resistance R may be detected and the voltage of the battery packs BP_1 to BP_L may be detected. The voltages of the unit leak detecting units 21_1 to 21_L can be set in various ways, and each switch provided in each of the leak detecting units 21_1 to 21_L can be opened or closed. Accordingly, the voltages of the battery packs BP_1 to BP_L can be set to various values, and the leakage currents from the entire battery packs BP_1 to BP_L can be detected for each different voltage value. For example, the capacitors disposed in the unit leak detecting units 21_1 to 21_L are maintained in the same state as the voltages of the battery packs BP_1 to BP_L, The leakage current can be detected by the module leakage detection unit 22 and the module leakage detection unit 22 can be connected by the protection resistor R3 as required.

The information detected by the unit leakage detection units 21_1 to 21_L or the module leakage detection unit 22 at various voltage values of the unit leakage detection units 21_1 to 21_L can be transmitted to the comparator 23, 23) can compare the reference value of each of the battery packs BP_1 to BP_L with the detection information and calculate the result. And the compared and calculated values may be transmitted to the control module 24. The control module 24 can determine whether or not the respective battery packs BP_1 to BP_L are normal based on the information transmitted from the comparator. And the alarm unit 25 can be operated according to the detection result.

The unit leak detection units 21_1 to 21_L or the module leak detection units 22 can be made into various structures and are not limited to the illustrated embodiments.

FIG. 3 illustrates an example of a structure for detecting an operation process error applied to the battery management apparatus according to the present invention.

3, the battery management apparatus may include contact detection units 31a, 31b, 32a, and 32b that are in contact with electrodes of respective batteries B1, B2, and BM and change the contact state according to the operation temperature .

The operating state of the battery pack needs to be monitored during charging or discharging of the battery module, and the operating state can be detected in the power supply process. Detection modules for monitoring the charge / discharge process or the operation process may be additionally disposed or independently arranged. The operation detection module includes a contact detection unit 31a and 32a for electrically connecting each one electrode of each battery B1, B2 and BM to each other, And two contact detection units 31b and 32b for electrically connecting the electrodes to each other. The contact detection units 31a and 32a and the two contact detection units 31b and 32b are provided with electrode contacts 311 or electrode contacts 321 formed in contact with the electrodes of the batteries B1, And may include 12 contact detection units 32a and 22 contact detection units 31b which may include a detection unit 31a and a 21 contact detection unit 32b and also have a relatively small thermal expansion coefficient. For example, the 11 contact detection unit 31a may be contacted to the positive electrode of each of the batteries B1, B2, and BM, and the 21 contact detection unit 32b may be connected to the negative electrode of each of the batteries B1, . A current detecting unit 31 for connecting the contact detecting units 31a and 32b or 32a and 32b facing each other to each other and a resistance sensor 34 for detecting the electric resistance of each electrode hole 311 and the electrode protrusion 321, ≪ / RTI >

Heat may be generated in the batteries B1, B2, and BM depending on the deterioration level during charging, discharging, or operation of the battery, and thus different resistances may be exhibited depending on the batteries B1, B2, and BM. The resistance sensor 34 may have a function of detecting such a change in resistance. The 11 contact detection unit 31a and the 21 contact detection unit 32b which are in contact with the electrode holes 311 or the electrode protrusions 321 of the respective batteries B1, B2 and BM are made of a conductive material having a large thermal expansion coefficient It can be a metal material. On the other hand, the 12 contact detection units 32a and 22 contact detection units 31b, which are in contact with the 11 contact detection units 31a and 21 contact detection units 32b, respectively, are made of a synthetic resin material or a metal material ≪ / RTI > The electrode hole 311 or the electrode protrusion 321 which is in contact with the battery B1, B2 or BM having a relatively high deterioration level can be separated from the electrode and the current detection unit 31 or the resistance sensor 34 ). ≪ / RTI > The information detected by the current detection unit 31 or the resistance sensor 34 can be transmitted to the status analysis module 35 and the status analysis module 35 can determine whether or not each battery B1, BM) can be detected. A temperature sensor 33 may be provided as needed to detect the state of the temperature change of the contact detection units 31a to 32b and to transmit it to the state analysis module 35 but this is not necessarily required. The batteries B1, B2, and BM may be replaced according to the information detected by the status analysis module 35 or the operating state of the UPS may be appropriately adjusted and transferred to the warning display unit 36 as necessary An alarm may be generated either spontaneously or visually.

The state of the battery pack or battery module during charging, discharging or operation may be detected in various ways and is not limited to the embodiments shown.

FIG. 4 illustrates an embodiment of a battery module to which the battery management device according to the present invention is applied.

Referring to FIG. 4, the module case 42 can be received in the box-shaped housing 41, and the housing 41 can be layered up and down. The upper part of the housing 41 can be sealed by the detachable cover 43 and the module case 42 can be slidably received or separated in one layer and the operation module, Wiring can be arranged. A battery module may be disposed inside the module case 42 and a plurality of heat dissipating slits 441 may be disposed on the case cover 44 forming the ceiling surface of the module case 42. [ The battery module fixed inside the module case 42 may include a plurality of battery packs or batteries connected in series or in parallel with each other.

5 illustrates an electrode connection bracket for connecting different batteries in the battery management apparatus according to the present invention.

5, the different batteries B11 to B24 forming each of the battery packs BP_1 to BP_2 are connected by connection brackets 50 and 50b, and the connection brackets 50 and 50b are connected by a thick Electrode contact portions 511 and 512 formed on the front surface and the rear surface, and connection holes 515 formed on the side surfaces thereof.

5 shows a state where the same electrodes of different batteries B11, B12, B13, B14, B21, B22, B23 and B24 are connected by the connecting brackets 50 and 50b. The connecting brackets 50 and 50b may include at least one unit bracket 51, 51_1, 51_2, 51_3 and 51_4, and each unit bracket 51, 51_1 to 51_4 may be a strip or a linear substrate structure. And a plurality of unit brackets 51, 51_1 to 51_4 are connected to each other to form one connection bracket 50, 50b. Each of the unit brackets 51, 51_1 to 51_4 includes a pair of electrode contact portions 511, 512 and 514 formed on one surface and the other surface; A conductive portion 513 connecting the pair of electrode contact portions 511, 512, and 514 to each other; And a connection hole 515 formed in the side surface. The pair of electrode contact portions 511, 512, and 514 can be made to be in contact with the same electrode or different electrodes, and can be made of, for example, a projection, a groove, a double groove or a double projection. A pair of electrode contact portions 511, 512 and 514 capable of connecting the same electrodes to one another are formed on one surface of the unit brackets 51 and 51_1 to 51_4 and the other surfaces of the unit brackets 51 and 51_1 to 51_4 A pair of electrode contact portions 511, 512, and 514 that can connect different electrodes to each other can be formed. The different unit brackets 51, 51_1 to 51_4 may be connected to each other by fastening pins 516 coupled to the connection holes 515 formed in the side surfaces. The connection brackets 50 and 50b are disposed on both the center layer and the center layer made of an insulating material such as a synthetic resin material so that the pair of electrode contact portions 511 and 512 and 514 and the conductive portion 513 are formed And a connection layer. And the connection hole 515 may be formed in the center layer and the fastening pin 516 may be made of a rigid synthetic resin material of insulation introduction. Referring to the right part of FIG. 5, the same electrodes can be connected to each other by the unit brackets 51_1 and 51_3, and the different electrodes can be connected to each other by the unit brackets 51_2 and 51_4.

The different batteries B11 to B24 may be connected to each other by unit brackets 51, 51_1 to 51_4 or connection brackets 50 and 50b having various structures, and are not limited by the illustrated embodiments.

The battery management apparatus for an uninterruptible power supply according to the present invention detects the possibility of occurrence of an operation error or an operation error of each battery forming the battery module before or during the operation of the power source apparatus. In addition, the battery management apparatus according to the present invention enables detection of operational errors of various types of batteries generated in the battery module. For example, the battery management device enables such a battery to be replaced in advance, while allowing detection of an operating error due to deterioration of the battery.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention . The invention is not limited by these variations and modifications, but is limited only by the claims appended hereto.

11_1, 11_2, 11_L: balance unit 12: switch module
13: Leakage current detection unit 14: Comparator
15: control module 16: management server
21_1 to 21_L: Unit leak detection unit
22: module leakage detection unit 23: comparator
24: control module 25: alarm unit
31: current detection unit 31a, 32a: 11, 12 contact detection unit
31b, 32b: 22, 21 contact detection unit 33: temperature sensor
34: resistance sensor 35: status analysis module
36: Warning indication unit 41: Housing
42: Module case 43: Cover
44: Case cover 50, 50b: Connection bracket
51, 51_1, 51_2, 51_3, 51_4: unit bracket
311: Electrode hole 321: Electrode projection
441: heat radiation slit 511, 512, 514: electrode contact portion
513: Conductive portion 515: Connection hole
516: fastening pins B1 to BK, BM: battery
B11 to B24: batteries BP_1 to BP_L: battery pack
R: Unit resistance R1, R2: Resistance
R3: Protection resistor

Claims (4)

Balance units (11_1, 11_2, 11_L) connected to at least one battery pack (BP_1 to BP_L) formed by connecting a plurality of batteries to each other to maintain each of the battery packs (BP_1 to BP_L) in a predetermined voltage state;
A leakage current detection unit 13 for detecting a current of the battery packs BP_1 to BP_L;
A switch module 12 for electrically opening and closing between the leakage current detection unit 13 and each of the battery packs BP_1 to BP_L; And
A comparator 14 for comparing the currents flowing through the battery packs BP_1 to BP_L according to different voltages; And
And a control module (15) for determining an operating state of each of the battery packs (BP_1 to BP_L) from the detection information transmitted from the comparator (14)
The balance units 11_1 to 11_L are capable of switching the respective battery packs BP_1 to BP_L into at least two different voltage states and are provided with different batteries B11 to B24 forming the battery packs BP_1 to BP_2 The connection brackets 50 and 50b are connected to the electrode contact portions 511 and 512 formed on the front and back surfaces and the connection holes 515 and 512 formed on the side surfaces of the connection brackets 50 and 50b, And a battery management device for managing the battery. The battery pack according to claim 1, wherein the leakage current detection unit (13) includes unit leak detection units (21_1 to 21_L) for detecting leakage of current between two different battery packs (BP_1 to BP_L) And a module leakage detection unit (22) for detecting current leakage of the battery module. delete delete

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