KR102421418B1 - Battery Energy Storage System Control Unit - Google Patents

Abstract

Since the present invention can measure the current of a large current path that is not affected by temperature in the busbar, it is possible to check whether a failure occurs even when a failure occurs in the shunt resistor, so that the safety can be improved in the battery integrated controller of the energy storage system. it's about
As an example, the present invention relates to a battery integrated controller included in one battery tray of a battery tray set, which is a plurality of battery trays mounted on a rack, for electrically connecting with the negative and positive electrodes of the battery tray set connected in series with each other. A bus having a first terminal portion, a second terminal portion for electrically connecting to the negative and positive electrodes of another rack or power conversion system, and a metal plate connected to a large current path between the first terminal portion and the second terminal portion, in which two through holes are formed The bar and the thermistor for measuring the temperature of the bus bar, and the bus bar and the thermistor are electrically connected to measure the voltage between the two through-holes of the bus bar, and the current for the voltage of the bus bar is compensated for the temperature. Disclosed is an integrated battery controller of an energy storage system including a rack battery management system for calculating a second current.

Description

Battery Integrated Controller of Energy Storage System {Battery Energy Storage System Control Unit}

Various embodiments of the present invention relate to an integrated battery controller of an energy storage system.

The energy storage system is connected with renewable energy such as solar cells and the power system, and is configured to store power when the power demand of the load is low and use the stored power when the power demand of the load is high, and the secondary battery It refers to a device including a large number of battery cells composed of

Typically, the energy storage system has a configuration in which a plurality of battery cells are accommodated in a plurality of trays, a plurality of trays are accommodated in a rack, and a plurality of racks are accommodated in a container box.

Since the energy storage system is composed of a plurality of battery cells, it is common to have a high capacity and high output, and thus, a technology for improving safety is being studied.

The present invention provides a battery integrated controller of an energy storage system capable of measuring a current of a large current path that is not affected by temperature in a busbar.

The battery integrated controller of the energy storage system according to an embodiment of the present invention relates to a battery integrated controller included in one battery tray of a battery tray set that is a plurality of battery trays mounted on a rack, and the battery tray set connected in series with each other A first terminal portion for electrically connecting to the negative and positive poles of another rack or a second terminal portion for electrically connecting to the negative and positive poles of another rack or power conversion system, and a large current path between the first terminal portion and the second terminal portion A metal plate connected to a bus bar having two through-holes formed therein, a thermistor for measuring the temperature of the bus bar, and a voltage between the bus bar and the thermistor electrically connected to the bus bar and the two through-holes of the bus bar It may include a rack battery management system that measures and calculates a second current that compensates the current for the voltage of the bus bar with respect to the temperature.

It is connected in series with the bus bar, further comprising a shunt resistor for measuring the current of the large current path, the rack battery management system through the voltage across the shunt resistor to calculate a first current that is a current in the large current path can

The rack battery management system compensates for the current compensation value according to the temperature in the current measured value calculated by dividing the voltage actually measured by the bus bar by the resistance value according to the temperature actually measured by the thermistor to obtain a second current value can be calculated.

The rack battery management system may calculate a current calculated value to which the voltage measured by the bus bar and a resistance temperature coefficient is applied, and determine a current compensation value according to the calculated current value and temperature.

The rack battery management system may store a compensation value for the temperature and the current calculated value of the bus bar.

The calculated current calculated in the rack battery management system can be calculated by dividing the voltage (Vs) measured at the two through-holes of the bus bar by the theoretical resistance value (Ra) of the bus bar at a temperature of a degree.

으로 산출하며, 상기 R₂₅가 25도에서의 버스바의 저항값이고, 상기 a가 온도이고, 상기 Rcu는 구리의 저항 온도 계수일 수 있다. The theoretical resistance (Ra) of the bus bar at the temperature a

, wherein R ₂₅ is a resistance value of the bus bar at 25 degrees, a is a temperature, and Rcu may be a temperature coefficient of resistance of copper.

A fuse unit including a first fuse connected between the first negative terminal of the first terminal part and the shunt resistor, and a second fuse connected between the positive first terminal of the first terminal part and the positive second terminal of the second terminal part may include more.

A contactor part comprising a first contactor connected between the bus bar and the second negative terminal of the second terminal part, and a second contactor connected between the second fuse and the positive second terminal of the second terminal part can

The rack battery management system may be electrically connected to the contactor unit to control opening and closing of the contactor unit through the current calculated from the shunt resistor and the bus bar.

Since the battery integrated controller of the energy storage system according to an embodiment of the present invention can measure the current of a large current path that is not affected by temperature in the busbar, it is possible to check whether a failure occurs even if a failure occurs in the shunt resistor. This can be improved.

않는 대전류 경로의 전류를 측정할 수 있으므로 추가적인 비용추가를 방지하고 설계변경이 용이할 수 있다. 물론 버스바에서 온도에 영향 받지 않는 대전류 경로의 전류를 측정할 수 있으므로, 션트 저항의 고장여부도 확인 가능할 수 있게 된다.To be more specific, two through-holes are formed in the bus bar without adding additional components, voltage is measured through them, and temperature compensation is compensated for

Since it can measure the current of a large current path that is not used, it is possible to prevent additional cost and facilitate design changes. Of course, since it is possible to measure the current of a large current path that is not affected by temperature in the busbar, it is possible to check whether the shunt resistor is faulty.

1 is a front view showing an energy storage system of the present invention.
2 is a structural diagram illustrating a structure of an integrated battery controller of an energy storage system according to various embodiments of the present disclosure.
3 is a circuit diagram of an integrated battery controller of the energy storage system of FIG. 2 .
FIG. 4 is a graph showing measured current values and calculated values of bus bars of the integrated battery controller of FIGS. 2 and 3 .

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Examples of the present invention are provided to more completely explain the present invention to those of ordinary skill in the art, and the following examples may be modified in various other forms, and the scope of the present invention is as follows It is not limited to an Example. Rather, these examples are provided so that this disclosure will be more thorough and complete, and will fully convey the spirit of the invention to those skilled in the art.

In addition, in the following drawings, the thickness or size of each layer is exaggerated for convenience and clarity of description, and the same reference numerals in the drawings refer to the same elements. As used herein, the term “and/or” includes any one and any combination of one or more of those listed items. In addition, in the present specification, "connected" means not only when member A and member B are directly connected, but also when member A and member B are indirectly connected by interposing member C between member A and member B. do.

The terminology used herein is used to describe specific embodiments, not to limit the present invention. As used herein, the singular form may include the plural form unless the context clearly dictates otherwise. Also, as used herein, “comprise” and/or “comprising” refers to the presence of the recited shapes, numbers, steps, actions, members, elements, and/or groups of those specified. and does not exclude the presence or addition of one or more other shapes, numbers, movements, members, elements and/or groups.

Here, the same reference numerals are assigned to parts having similar configurations and operations throughout the specification. In addition, when a part is said to be electrically coupled to another part, this includes not only the case where it is directly connected but also the case where it is connected with another element interposed therebetween.

Referring to Figure 1, there is shown a front view showing the energy storage system of the present invention. Also, referring to FIG. 2, there is shown a structural diagram showing the structure of the integrated battery controller of the energy storage system according to various embodiments of the present invention. Referring to FIG. 3, the battery integrated controller of the energy storage system of FIG. A circuit diagram is shown. Hereinafter, referring to FIGS. 1 to 3 , an integrated battery controller of an energy storage system according to various embodiments of the present invention will be described.

First, the energy storage system 10 may include a rack 11 separated by a plurality of shelves 12 . In addition, in the energy storage system 10 , a plurality of battery trays BT1 , BT2 , ... , BT16 may be accommodated in a plurality of shelves 12 of the rack 11 , respectively. Of course, the plurality of battery trays (BT1, BT2, ..., BT16) may be electrically connected to each other in series after being accommodated in the rack (11). Here, a plurality of battery trays (BT1, BT2, ..., BT16) mounted in one rack 11 are illustrated as being 16, but this is variously changeable and the present invention is not limited thereto.

In addition, although the energy storage system 10 is illustrated as including one rack 11 , it may include a plurality of racks 11 . At this time, the plurality of racks 11 may be arranged in an approximately horizontal direction so that the plurality of shelves 12 are positioned parallel to each other. Of course, the same number of battery trays BT1, BT2, ..., BT16 may be mounted in the plurality of racks 11, respectively. Also, a plurality of racks 11 may be electrically connected.

In addition, the plurality of battery trays BT1 , BT2 , ... , BT16 may each include a plurality of battery cells 1 and a module battery management system 2 , respectively. A plurality of battery cells 1 included in the battery tray may be electrically connected to each other in series. In addition, the module battery management system 2 may control cell balancing of the plurality of battery cells 1 included in the battery tray. In addition, the module battery management system 2 may read the temperatures and voltages of the plurality of battery cells 1 sensed by the sensors included in the battery tray, and transmit them to the battery integrated controller 100 through communication.

Hereinafter, a plurality of battery trays BT1, BT2, ..., BT16 mounted in one rack 11 will be referred to as battery tray sets BT1, BT2, ..., BT16.

The energy storage system 10 may include an integrated battery controller 100 in at least one of the battery tray sets BT1, BT2, ..., BT16. Of course, when the energy storage system 10 includes a plurality of racks 11 , an integrated battery controller 100 may be provided for each of the plurality of racks 11 , respectively. Preferably, the battery integrated controller 100 may be included in the top or bottom battery tray (BT1, BT16) of the rack (11). In the present invention, the integrated battery controller 100 is illustrated as being included in the first battery tray BT1 in the rack 11, but the present invention is not limited thereto.

Hereinafter, the configuration and operation of the integrated battery controller 100 will be described with reference to FIGS. 2 to 3 .

The battery integrated controller 100 includes a first terminal portion T1, a second terminal portion T2, a fuse portion Fuse1, Fuse2, a contactor portion C1, C2, a rack battery management system 110, a shunt resistor 120 ) and a bus bar 130 .

The first terminal part (T1) is mounted in the rack (11) and is electrically connected to the negative and positive electrodes of the battery tray sets (BT1, BT2, ..., BT16) electrically connected to each other in series with two terminals (T11, T11, T12). That is, the first terminal portion T1 includes the negative first terminal T11 and the battery tray sets BT1, BT2, …, BT16 connected to the negative pole of the battery tray sets BT1, BT2, …, BT16 connected in series with each other. It may include a positive first terminal T12 connected to the positive electrode.

The second terminal portion T2 includes a negative second terminal T21 and a positive second terminal T22. The second terminal part T2 may be an external terminal, and may be electrically connected to an external terminal of another adjacent rack 11 . As another example, the second terminal unit T2 is a power conversion system (hereinafter referred to as “PCS”, Power Conversion System) for power conversion for charging and discharging of the battery tray sets (BT1, BT2, ..., BT16) included in the rack 11 . ) can be electrically connected to. Here, the PCS converts the DC power output from the battery tray sets (BT1, BT2, ..., BT16) of the rack 11 into AC to supply power to the outside, or converts the AC power supplied from the outside into DC to the battery tray Sets BT1, BT2, ..., BT16 can be charged. The second terminal portion T2 may be connected in parallel with the first terminal portion T1 .

The fuse units Fuse1 and Fuse2 may be electrically connected to a large current path between the first terminal unit T1 and the second terminal unit T2 . The fuse units Fuse1 and Fuse2 may include a first fuse Fuse1 and a second fuse Fuse2. The first fuse Fuse1 and the second fuse Fuse2 are respectively connected between the negative first terminal T11 and the negative second terminal T21 and between the positive first terminal T12 and the positive second terminal T22, respectively. may be interposed in The first fuse Fuse1 and the second fuse Fuse2 are operated by overcurrent or high voltage, respectively, between the negative first terminal T11 and the negative second terminal T21 or between the positive first terminal T12 and the positive electrode, respectively. Between the second terminals T22 may be electrically separated. In addition, the first fuse (Fuse1) and the second fuse (Fuse2) are electrically connected to the rack battery management system 110, it is possible to transmit whether the fuse operates.

The contactor parts C1 and C2 may be electrically connected to a large current path between the first terminal part T1 and the second terminal part T2. The contact parts C1 and C2 may include a first contactor C1 and a second contactor C2. The first contactor C1 and the second contactor C2 may be connected in series with the first fuse Fuse1 and the second fuse Fuse2, respectively. The first contactor C1 may electrically connect between the first fuse Fuse1 and the negative second terminal T21. In addition, the second contactor C2 may electrically connect the second fuse Fuse2 and the anode second terminal T22. The first contactor (C1) and the second contactor (C2) may be electrically connected to the rack battery management system 110 and may be turned on or off under the control of the rack battery management system 110 .

Additionally, the contactor units C1 and C2 may further include a charge-off contactor C3. The charge-off contactor C3 may be connected in series with the second contactor C2. The charge-off contactor C3 is electrically connected to the rack battery management system 110 and may be turned on or off under the control of the rack battery management system 110 . Such a charge-off contactor C3 may be connected in parallel with a forward large-capacity diode. When the charge-off contactor C3 is turned off, the charging of the battery tray sets BT1, BT2, ..., BT16 is blocked and only discharging is possible. Here, the forward high-capacity diode means that the current is connected to move from the positive first terminal T12 to the positive second terminal T22.

The rack battery management system 110 may be electrically connected to the contactor units C1 and C2 , the shunt resistor 120 and the bus bar 130 . Of course, the rack battery management system 110 may be connected through communication with the module battery management system 2 included in the battery tray set (BT1, BT2, ..., BT16). Rack battery management system 110 may receive the temperature and voltage of a plurality of battery cells (1) from each module battery management system (2) included in the battery tray set (BT1, BT2, ..., BT16), It is possible to control the operation of the module battery management system (2). The rack battery management system 110 may calculate the current measured in the shunt resistor 120 and the bus bar 130, and may control the driving of the contactors C1, C2 by the calculated current.

The shunt resistor 120 may be provided in a large current path between the first terminal part T1 and the second terminal part T2 and may be a resistor for sensing a current flowing in the large current path. For example, the shunt resistor 120 may be electrically connected between the negative first terminal T11 of the first terminal portion T1 and the negative second terminal T21 of the second terminal portion T2. The shunt resistor 120 may be connected in series with the first fuse Fuse1. The shunt resistor 120 may be electrically connected to the rack battery management system 110 . The rack battery management system 110 may sense the charge/discharge current of the battery tray set (BT1, BT2, ..., BT16) through the voltage applied to both ends of the shunt resistor 120 . The shunt resistor 120 may measure a current of a large current path that is not affected by temperature.

The bus bar 130 may be electrically connected to the shunt resistor 120 in series. For example, the bus bar 130 may electrically connect the shunt resistor 120 and the negative second terminal T21 of the second terminal portion T2. That is, the shunt resistor 120 and the bus bar 130 may be connected in series between the negative first terminal T11 of the first terminal portion T1 and the negative second terminal T21 of the second terminal portion T2. . The bus bar 130 may be a metal plate having a predetermined thickness and width. Preferably, the bus bar 130 may be made of copper. As another example, when the shunt resistor 120 and the bus bar 130 are connected in series between the positive first terminal T12 of the first terminal portion T1 and the positive second terminal T22 of the second terminal portion T2 , the bus bar 130 may be made of aluminum. Hereinafter, when the shunt resistor 120 and the bus bar 130 are connected in series between the negative first terminal T11 of the first terminal portion T1 and the negative second terminal T21 of the second terminal portion T2, I would like to explain

The bus bar 130 may be a metal plate electrically connecting the shunt resistor 120 and the first contactor C1 in a large current path. The bus bar 130 may be provided with two through holes h1 and h2 passing through the bus bar 130 between both ends. Here, the two through-holes h1 and h2 may be spaced apart from each other by a predetermined distance. Preferably, the distance between the two through-holes h1 and h2 may be the same as the distance between both ends of the shunt resistor 120 . The rack battery management system 110 may be electrically connected to the two through-holes h1 and h2 of the bus bar 130 . The rack battery management system 110 may detect a voltage applied between the two through-holes h1 and h2 of the bus bar 130 . In addition, a thermistor is further mounted on the bus bar 130 to measure the temperature of the bus bar 130 and transmit it to the rack battery management system 110 . That is, the rack battery management system 110 may receive the voltage between the two through-holes h1 and h2 of the bus bar 130 and the temperature of the bus bar 130 . In addition, the rack battery management system 110 may calculate the current of the large current path by compensating the current according to the voltage between the two through-holes h1 and h2 of the bus bar 130 according to the temperature.

That is, the battery integrated controller 100 may measure the current of the same large current path through the shunt resistor 120 and additionally measure the current through the bus bar 130 . Hereinafter, the current in the large current path measured by the shunt resistor 120 will be referred to as a first current, and the current in the large current path measured by the bus bar 130 will be referred to as a second current. Here, since the first current and the second current are both the charging and discharging currents of the battery tray sets BT1, BT2, ..., BT16, which are currents flowing in the large current path, they may have the same value.

However, since the current measured by the bus bar 130 is affected by the temperature of the bus bar 130 , it may be possible to calculate the second current by compensating for the current changed according to the temperature. That is, the rack battery management system 110 may calculate the second current by applying a compensation value as much as the current measured in the bus bar 130 to the current changed according to the temperature.

Referring to Table 1, when the current value flowing through the large current path is 100A, the measured current value of the bus bar 130 according to the change of the temperature value, the calculated value, and the result of the difference value are respectively displayed. Also, referring to FIG. 4 , when the current values flowing through the large current paths shown in Tables 1 to 3 are 100A, 150A, and 200A, graphs of measured current values, calculated values, and difference values are displayed. Hereinafter, calculation of the compensation value and the second current will be described with reference to Tables 1 to 3 and FIG. 4 .

temperature value
(℃) output
(A) measured value
(A) difference temperature value
(℃) output
(A) measured value
(A) difference 25 100 100 0 55 112 111.3 0.7 26 100 100 0 56 113 111.7 1.3 27 100 100 0 57 113 112.1 0.9 28 101 101.1 -0.1 58 114 112.4 1.6 29 101 101.7 -0.7 59 114 112.8 1.2 30 102 102.1 -0.1 60 115 113.2 1.8 31 102 102.3 -0.3 61 115 113.6 1.4 32 103 102.6 0.4 62 115 113.9 1.1 33 103 102.9 0.1 63 116 114.3 1.7 34 103 103.2 -0.2 64 116 114.7 1.3 35 104 103.6 0.4 65 117 115.1 1.9 36 104 104 0 66 117 115.6 1.4 37 105 104.3 0.7 67 118 116.1 1.9 38 105 104.7 0.3 68 118 116.5 1.5 39 106 105.1 0.9 69 118 117 One 40 106 105.4 0.6 70 119 117.4 1.6 41 106 105.8 0.2 71 119 117.8 1.2 42 107 106.2 0.8 72 120 118.1 1.9 43 107 106.6 0.4 73 120 118.4 1.6 44 108 106.9 1.1 74 121 118.8 2.2 45 108 107.4 0.6 75 121 119.1 1.9 46 109 107.9 1.1 76 121 119.4 1.6 47 109 108.3 0.7 77 122 119.8 2.2 48 109 108.8 0.2 78 122 120.2 1.8 49 110 109.3 0.7 79 123 120.5 2.5 50 110 109.7 0.3 80 123 120.9 2.1 51 111 110.1 0.9 81 124 121.3 2.7 52 111 110.4 0.6 82 124 121.7 2.3 53 112 110.7 1.3 83 124 122.1 1.9 54 112 111 One 84 125 122.4 2.6

Here, the measured value may be a value obtained by dividing the voltage measured by the bus bar 130 by the resistance value with respect to the temperature measured by the bus bar 130 . That is, the measured value may be a measured current value of the bus bar 130 . Also, the difference value may be a value obtained by subtracting a measured value from a calculated value. In addition, the calculated value may be a current value calculated from Equations 1 and 2 to be described below.

Here, Ia may be a calculated current of the bus bar at a temperature a, Vs may be a voltage value measured at the bus bar, and Ra may be a theoretical resistance value of the bus bar at a temperature a. In addition, the theoretical resistance value of the bus bar at temperature a can be calculated from Equation 2 below.

Here, Ra is a theoretical resistance value of the bus bar at a temperature a, R ₂₅ may be a resistance value of the bus bar at 25 degrees, and Rcu may be a temperature coefficient of resistance of copper. That is, by dividing the voltage value measured at the bus bar by the calculated resistance value Ra of the bus bar at the temperature a through Equation 2, the calculated current value at the temperature a can be calculated.

As shown in Table 1, it can be seen that the difference between the measured current value measured through the bus bar 130 and the calculated current value is less than 3°C at most. That is, it can be seen that the calculated current value of the bus bar 130 is similar to the measured current value through Equations 1 and 2 without much difference.

In addition, as shown in Table 1, when the current value flowing through the large current path is 100A and the temperature is 25°C to 84°C, the actual value, which is the current measured in the bus bar 130, increases from 100A to 122.4A according to the temperature change. It can be seen that the calculated value also increased from 100A to 125A according to the temperature change. That is, it can be seen that the measured current value and the calculated current value increased by 22.4A or 5A from the original current value flowing through the large current path according to the temperature.

Therefore, the rack battery management system 110 can calculate the second current that is the current of the bus bar 130 by applying a compensation value corresponding to the current changed according to the temperature from the measured current measured in the bus bar 130 . . Here, the rack battery management system 110 may determine the compensation value through the calculated value.

For example, when the current flowing in the large current path is 100A and the temperature of the bus bar 130 is 69°C, it can be seen that the actual value, which is the current measured in the bus bar 130, is 117A. At this time, in the rack battery management system 110, the current flowing in the large current path is 100A and the calculated value when the temperature of the bus bar 130 is 69°C is 118A, so the difference from the original current flowing in the large current path is 100A. 18A can be determined as the compensation value. Additionally, the rack battery management system 110 may further include a memory for storing a compensation value according to the temperature and the calculated value of the bus bar.

That is, the rack battery management system 110 may calculate 99A by subtracting the compensation value of 18A from the measured value of 117A as the second current that is the current of the bus bar 130 . The second current calculated in this way is a current value excluding the effect of temperature, and it can be seen that it is calculated as a value almost similar to 100A, which is the current of the actual large current path.

Such a rack battery management system 110 determines the current compensation value according to the temperature through the calculated value, and through this, the current measured value of the bus bar 130 can be calculated as a second current value without change in the influence of the temperature. have.

Additionally, referring to Tables 2 to 3, when the current values flowing in the large current path are 150A and 200A, respectively, the results of the measured current value, the calculated value, and the difference value of the bus bar 130 according to the change in the temperature value are respectively is indicated. As shown in Tables 2 and 3, it can be seen that the difference between the measured current value measured through the bus bar 130 and the calculated current value is less than 4°C at most. Therefore, the rack battery management system 110 can calculate the second current without affecting the temperature by applying the current compensation value according to the temperature from the measured value measured in the bus bar (130).

temperature value
(℃) output
(A) measured value
(A) difference temperature value
(℃) output
(A) measured value
(A) difference 25 150 149.4 0.6 55 169 168.4 0.6 26 150 150.1 -0.1 56 169 169.1 -0.1 27 151 150.8 0.2 57 170 169.8 0.2 28 151 151.9 -0.9 58 171 170.5 0.5 29 152 152.4 -0.4 59 171 170.9 0.1 30 153 153.3 -0.3 60 172 171.3 0.7 31 153 153.9 -0.9 61 173 172 One 32 154 154.9 -0.9 62 173 172.3 0.7 33 155 155.6 -0.6 63 174 172.8 1.2 34 155 156.2 -1.2 64 175 173.4 1.6 35 156 157.2 -1.2 65 175 174.1 0.9 36 157 157.6 -0.6 66 176 174.6 1.4 37 157 158.3 -1.3 67 177 175 2 38 158 158.8 -0.8 68 177 175.7 1.3 39 159 159.2 -0.2 69 178 176 2 40 159 159.7 -0.7 70 179 176.6 2.4 41 160 160.1 -0.1 71 179 177.3 1.7 42 160 160.6 -0.6 72 180 178 2 43 161 161.1 -0.1 73 180 178.7 1.3 44 162 161.8 0.2 74 181 179.2 1.8 45 162 162.2 -0.2 75 182 180.1 1.9 46 163 162.9 0.1 76 182 180.7 1.3 47 164 163.3 0.7 77 183 181.4 1.6 48 164 164 0 78 184 182.1 1.9 49 165 164.7 0.3 79 184 182.6 1.4 50 166 165 One 80 185 183 2 51 166 165.7 0.3 81 186 183.5 2.5 52 167 166.5 0.5 82 186 184 2 53 168 167 One 83 187 184.6 2.4 54 168 167.7 0.3 84 188 185.1 2.9

temperature value
(℃) output
(A) measured value
(A) difference temperature value
(℃) output
(A) measured value
(A) difference 25 200 1998.8 0.2 55 225 227.2 -2.2 26 200 200.4 -0.4 56 226 228 -2 27 201 201.4 -0.4 57 227 228.7 -1.7 28 202 202.5 -0.5 58 228 229.4 -1.4 29 203 203.5 -0.5 59 229 230.2 -1.2 30 204 204.5 -0.5 60 230 231 -One 31 205 205.5 -0.5 61 230 231.7 -1.7 32 206 206.5 -0.5 62 231 232.9 -1.9 33 206 207.5 -1.5 63 232 233.6 -1.6 34 207 208.5 -1.5 64 233 234.5 -1.5 35 208 209.4 -1.4 65 234 235.5 -1.5 36 209 210.5 -1.5 66 235 236.4 -1.4 37 210 211.5 -1.5 67 236 237.3 -1.3 38 211 212.5 -1.5 68 236 238.4 -2.4 39 212 213.6 -1.6 69 237 239.1 -2.1 40 212 214.4 -2.4 70 238 240 -2 41 213 215.4 -2.4 71 239 240.5 -1.5 42 214 216.6 -2.6 72 240 241.1 -1.1 43 215 217.5 -2.5 73 241 241.8 -0.8 44 216 218.6 -2.6 74 242 242.5 -0.5 45 217 219.5 -2.5 75 243 243.2 -0.2 46 218 220.5 -2.5 76 243 243.9 -0.9 47 218 221.6 -3.6 77 244 244.7 -0.7 48 219 222.4 -3.4 78 245 245.4 -0.4 49 220 222.9 -2.9 79 246 246.1 -0.1 50 221 223.7 -2.7 80 247 246.9 0.1 51 222 224.3 -2.3 81 248 247.6 0.4 52 223 225 -2 82 249 248.4 0.6 53 224 225.7 -1.7 83 249 249.1 -0.1 54 224 226.3 -2.3 84 249 249.8 -0.8

The battery integrated controller 100 of the present invention may measure the current of the large current path in both the shunt resistor 120 and the bus bar 130 . That is, in the battery integrated controller 100 of the present invention, even when the shunt resistor 120 fails, it is possible to measure the current in the large current path through the current measured in the bus bar 130 , so whether the shunt resistor 120 fails. can also be checked. In addition, by forming two through-holes h1 and h2 in the bus bar 130 without adding a separate configuration and measuring the voltage through them, the current of the large current path can be measured, thereby preventing additional cost and facilitating design changes. can do.

What has been described above is only one embodiment for implementing the battery integrated controller of the energy storage system according to the present invention, and the present invention is not limited to the above embodiment, but as claimed in the claims below Without departing from the gist of the invention, it will be said that the technical spirit of the present invention exists to the extent that various modifications can be made by anyone with ordinary knowledge in the field to which the invention pertains.

10: energy storage system 11: rack
BT1, BT2, … ,BT16: battery tray set 100: battery integrated controller
110: rack battery management system 120: shunt resistor
130: bus bar

Claims (10)

In the battery integrated controller included in one battery tray of the battery tray set, which is a plurality of battery trays mounted on a rack,
a first terminal unit for electrically connecting to the negative electrode and the positive electrode of the battery tray set connected in series with each other;
a second terminal unit for electrically connecting to the anode and cathode of another rack or power conversion system;
a metal plate connected to a large current path between the first terminal part and the second terminal part, the bus bar having two through-holes spaced apart from each other by a predetermined distance in the longitudinal direction;
a thermistor for measuring the temperature of the bus bar; and
Rack battery management that is electrically connected to the bus bar and the thermistor, measures the voltage between the two through-holes of the bus bar, and calculates a second current in which the current for the voltage of the bus bar is compensated for the temperature A battery integrated controller of an energy storage system comprising the system. The method of claim 1,
Further comprising a shunt resistor connected in series with the bus bar to measure a current of the large current path,
The rack battery management system is a battery integrated controller of the energy storage system for calculating a first current that is a current in a large current path through the voltage across the shunt resistor. The method of claim 1,
The rack battery management system is
An energy storage system for calculating a second current value by compensating a current compensation value according to temperature from a current measured value calculated by dividing the voltage actually measured by the bus bar by the resistance value according to the temperature actually measured by the thermistor Battery integrated controller. 4. The method of claim 3,
The rack battery management system calculates a current calculated value to which the voltage measured by the bus bar and a resistance temperature coefficient is applied, and the battery integrated controller of the energy storage system for determining a current compensation value according to the current calculated value and temperature. 5. The method of claim 4,
The rack battery management system is a battery integrated controller of the energy storage system that stores the compensation value for the current calculated value and the temperature of the bus bar. 5. The method of claim 4,
The current calculated value calculated in the rack battery management system is
A battery integrated controller of an energy storage system that calculates by dividing the voltage (Vs) measured at the two through holes of the bus bar by the theoretical resistance value (Ra) of the bus bar at a temperature of a degree. 7. The method of claim 6,
The theoretical resistance (Ra) of the bus bar at the temperature a

, wherein R ₂₅ is a resistance value of the bus bar at 25 degrees, a is a temperature, and Rcu is a temperature coefficient of resistance of copper. 3. The method of claim 2,
a fuse unit including a first fuse connected between the first negative terminal of the first terminal unit and the shunt resistor, and a second fuse connected between the positive first terminal of the first terminal unit and the positive second terminal of the second terminal unit The battery integrated controller of the energy storage system further comprising. 9. The method of claim 8,
A contactor unit comprising a first contactor connected between the bus bar and the second negative terminal of the second terminal unit, and a second contactor connected between the second fuse and the positive second terminal of the second terminal unit Battery integrated controller of energy storage system. 10. The method of claim 9,
The rack battery management system is electrically connected to the contactor unit, the integrated battery controller of the energy storage system for controlling the opening and closing of the contactor unit through the current calculated from the shunt resistor and the bus bar.

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