KR20170024818A - Apparatus for diagnosing state of control line - Google Patents
Apparatus for diagnosing state of control line Download PDFInfo
- Publication number
- KR20170024818A KR20170024818A KR1020150120326A KR20150120326A KR20170024818A KR 20170024818 A KR20170024818 A KR 20170024818A KR 1020150120326 A KR1020150120326 A KR 1020150120326A KR 20150120326 A KR20150120326 A KR 20150120326A KR 20170024818 A KR20170024818 A KR 20170024818A
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- node
- control line
- diagnostic
- potential
- switch
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
-
- G01R31/021—
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The present invention discloses an apparatus that can accurately diagnose the state of a control line while providing an apparatus that can diagnose the state of a control line of a driving load at a relatively low cost. The control line diagnostic apparatus according to an embodiment of the present invention is a drive circuit for driving a drive load by flowing a current from a first high potential node to a first low potential node through a control line when a drive switch is turned on, An apparatus for diagnosing a control line of a drive circuit in which a potential of a drive switch is higher than a potential of the drive load, the apparatus comprising: a first node connected to a first node formed on the control line; A first diagnostic line having a first resistor, a second resistor and a first diode connected in series; A second diagnostic line having one end connected to the first node and the other end connected to a second low potential node, and having a third resistor; A voltage measuring unit measuring a voltage of a second node formed between the first resistor and the second resistor; And a control unit for controlling the drive switch to set a predetermined operation mode and diagnosing the state of the control line using the voltage value of the second node measured by the voltage measurement unit in the set operation mode, The first diode may be provided in the first diagnostic line to allow the flow of current from the second high-potential node to the first node.
Description
The present invention relates to a technique for diagnosing the state of a control line that selectively controls the driving of a driving load by conducting a current, and more particularly, to a control line for diagnosing various fault conditions that may occur in the control line Diagnostic apparatus.
An electric appliance widely used in real life or the like is configured to be driven in accordance with conduction of electric current when current flows through the control line. For example, a relay (relay) may be configured to close an electric circuit when a current flows through a control line provided in the relay, and to open the electric circuit when no current flows through the control line do. However, if the control line is short-circuited or disconnected for some reason, the flow of current through the control line becomes stuck and the driving load can not be controlled.
As a more specific example, a relay used in an electric vehicle is a representative example. BACKGROUND OF THE INVENTION [0002] Electric vehicles, which have recently become increasingly interested in the world, have relays to control the electrical connection between the secondary battery and the electric motor. The relay is controlled by a control system of the electric vehicle, and the control system has a self-diagnosis function for diagnosing the state of the relay control line. However, the self-diagnosis function provided in the control system is performed by additionally providing a current sensing circuit to determine whether a current flows through the control line, or by separately providing an expensive element. Nowadays, there is an increasing demand to relocate the relay control function to the BMS. There is an increasing need for the BMS to diagnose the relay control line itself in response to the request. In order to enable the BMS to diagnose the status of the relay control line itself, a relatively inexpensive and compact diagnostic device is needed.
The Applicant has recognized the need for a device that can diagnose the condition of the control line at a relatively low cost. An object of the present invention is to provide an apparatus that can accurately diagnose the state of a control line while providing an apparatus capable of diagnosing the state of a control line of a driving load at a relatively low cost,
Other objects and advantages of the present invention will become apparent from the following description, and it will be understood by those skilled in the art that the present invention is not limited thereto. It is also to be understood that the objects and advantages of the invention may be realized and attained by means of the instrumentalities and combinations thereof.
According to an aspect of the present invention, there is provided a control line diagnostic apparatus comprising: a control line drive circuit that drives a drive load through a control line when a drive switch is turned on and a current flows from a first high potential node to a first low potential node An apparatus for diagnosing a control line of a drive circuit in which a potential of the drive switch is higher than a potential of the drive load, the apparatus comprising: a first node connected to a first node formed on the control line, A first diagnostic line coupled to the node and having a first resistor, a second resistor and a first diode connected in series; A second diagnostic line having one end connected to the first node and the other end connected to a second low potential node, and having a third resistor; A voltage measuring unit measuring a voltage of a second node formed between the first resistor and the second resistor; And a control unit for controlling the drive switch to set a predetermined operation mode and diagnosing the state of the control line using the voltage value of the second node measured by the voltage measurement unit in the set operation mode, The first diode may be provided in the first diagnostic line to allow the flow of current from the second high-potential node to the first node.
The control unit records the voltage value of the second node measured in the operation mode in which the drive switch is turned on and the voltage value of the second node measured in the operation mode in which the drive switch is turned off in a pre- The state of the control line can be diagnosed.
The state of the control line includes a high-potential short-circuit state in which the control line is short-circuited with the first high-potential node, a low-potential short-circuit state in which the control line is short-circuited with the first low- State and a steady state.
The first diagnostic line may further include a first diagnostic switch that is selectively turned on or off, and the control unit may control the first diagnostic switch to be turned on to diagnose the control line.
The second diagnostic line may further comprise a second diagnostic switch that is selectively turned on or off, and the control unit may control the second diagnostic switch to be turned on to diagnose the control line.
The first low potential node and the second low potential node may be connected to ground.
The potential of the second high potential node may be lower than or equal to the potential of the first high potential node.
And may be a relay for the driving unit.
In order to achieve the above object, a BMS (Battery Management System) according to another aspect of the present invention may include the control line diagnostic apparatus.
According to still another aspect of the present invention, a battery pack includes the control line diagnostic apparatus.
According to an aspect of the present invention, it is possible to provide an apparatus that can accurately diagnose the state of a control line while diagnosing the state of the control line of the drive load at a relatively low cost.
In addition, the present invention can have various other effects, and other effects of the present invention can be understood by the following description, and can be more clearly understood by the embodiments of the present invention.
BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate preferred embodiments of the invention and, together with the description of the invention given below, serve to further the understanding of the technical idea of the invention. And should not be construed as limiting.
1 is a diagram schematically showing a configuration of a control line diagnostic apparatus according to an embodiment of the present invention.
Figs. 2 to 5 are views showing four states of control lines provided in the driving circuit, respectively.
6 to 9 are diagrams showing four states in which the control line can be placed in an operation mode in which the drive switch is turned on.
Figures 10-13 illustrate four states in which the control line may be placed in an operating mode in which the drive switch is turned off.
14 is a diagram showing a diagnosis table according to an embodiment of the present invention.
15 is a view schematically showing the configuration of a control line diagnostic apparatus according to another embodiment of the present invention.
16 is a diagram schematically showing a configuration of a control line diagnostic apparatus according to another embodiment of the present invention.
17 is a diagram schematically showing a configuration of a control line diagnostic apparatus according to another embodiment of the present invention.
Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary terms, and the inventor should appropriately interpret the concepts of the terms appropriately It should be construed as meaning and concept consistent with the technical idea of the present invention based on the principle that it can be defined.
Therefore, the embodiments described in this specification and the configurations shown in the drawings are merely the most preferred embodiments of the present invention and do not represent all the technical ideas of the present invention. Therefore, It is to be understood that equivalents and modifications are possible.
In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail.
Throughout the specification, when an element is referred to as including an element, it does not exclude other elements unless specifically stated to the contrary, it may include other elements. Also, the term "control unit" as described in the specification means a unit for processing at least one function or operation, which may be implemented by hardware, software, or a combination of hardware and software.
In addition, in the entire specification, when a part is referred to as being 'connected' to another part, it may be referred to as 'indirectly connected' not only with 'directly connected' .
1 is a diagram schematically showing a configuration of a control line diagnostic apparatus according to an embodiment of the present invention.
Referring to FIG. 1, a control line
The
The
The battery management system (BMS) monitors the state of each
The
The
The
The first high
The first low
The driving
Meanwhile, the driving
The driving
The control line
The first
A first resistor R 1 , a second resistor R 2 and a first diode D 1 may be provided on the first
The second
The
The control unit can control the switching operation of the driving
According to one embodiment, the controller turns on the driving
The
Figs. 2 to 5 are views showing four states of control lines provided in the driving circuit, respectively. Fig. 2 to Fig. 5 are diagrams showing the driving circuit of Fig. 1, each showing four states in which the control line can be placed.
Referring to Figure 2, a
Hereinafter, a process of creating a diagnosis table according to an embodiment of the present invention will be described. Next, the process of diagnosing the state of the
First, a process of calculating the voltage of the second node in four states in which the control line can be placed in the operation mode in which the drive switch is turned on will be described.
6 to 9 are diagrams showing four states in which the control line can be placed in an operation mode in which the drive switch is turned on.
<When the drive switch is in the turned-on operation mode and the control line is in the normal state>
6, there is shown a state in which the
≪ When the drive switch is turned on and the control line is disconnected >
7, a state in which the
≪ When the drive switch is in the turned-on operation mode and the control line is in the high-
Next, referring to FIG. 8, a state in which the driving
≪ In the case where the driving switch is in the turned-on operation mode and the control line is in the low potential shorting state >
Next, referring to FIG. 9, a state in which the driving
V (N 2 ) = V (D 1 ) + V (R 2 )
= V (D 1 ) + (V cc 2 -V (D 1 )) * (R 2 / (R 1 + R 2 ))
Here, V (D 1 ) is a voltage applied to the first diode (D 1 ), and V (R 2 ) is a voltage applied to the second resistor (R 2 ). In the above equation, V (R 2 ) can be calculated by dividing the sum of the voltage applied to R 1 and the voltage applied to R 2 according to the magnitude of the resistance. That is, V (R 2 ) becomes (V cc2 -V (D 1 )) * (R 2 / (R 1 + R 2 )). On the other hand, since the voltage V (D 1 ) applied to the first diode D 1 is determined according to the specification of the diode element, it can be treated as a constant.
Next, a process of calculating the voltage of the second node N 2 in four states in which the control line can be placed in the operation mode in which the drive switch is turned off will be described.
Figures 10-13 illustrate four states in which the control line may be placed in an operating mode in which the drive switch is turned off.
≪ When the driving switch is turned off and the control line is in the normal state >
10, a state in which the
V (N 2 ) = V (R 3 // R L ) + V (D 1 ) + V (R 2 )
= V (D 1 ) + V (R 3 // R L ) + V (R 2 )
= V (D 1) + ( V cc2 -V (D 1)) * ((R 2 + (R 3 // R L)) / (
= V (D 1) + ( V cc2 -V (D 1)) * ((R 2 + ((R 3 * R L) / (R 3 + R L))) / (
Here, V (D 1 ) is a voltage applied to the first diode D 1 , V (R 2 ) is a voltage applied to the second resistor R 2 , and V (R 3 // R L Is a voltage applied between the first node N 1 and the ground GND1 and GND2. V (R 3 // R L ) is a voltage applied to the equivalent resistance of the resistance of the third resistor R 3 and the driving load 110 (the resistance of the third resistor and the driving load is connected in parallel) equal to the voltage applied between the (N 1) and the ground (GND1, GND2). In the above equation, V (R 3 // R L ) + V (R 2 ) represents the sum of the voltage applied to R 1 and the voltage applied to R 2 and R 3 // R L , And can be calculated. That is, V (R 3 // R L ) + V (R 2) is, (V cc2 -V (D 1 )) * ((R 2 + (R 3 // R L)) / (
Preferably, the resistance values of the first resistor R 1 , the second resistor R 2 and the third resistor R 3 are configured to have sufficiently large values, and the resistance value of the
In this case, the above equation can be approximated as follows, and the voltage of the second node N 2 is not affected by R L.
V (N 2 ) = V (R 3 // R L ) + V (D 1 ) + V (R 2 )
= V (D 1) + ( V cc2 -V (D 1)) * ((R 2 + ((R 3 * R L) / (R 3 + R L))) / (
? V (D 1 ) + (V cc 2 -V (D 1 )) * (R 2 / (R 1 + R 2 ))
≪ When the drive switch is turned off and the control line is disconnected >
11, a state in which the
V (N 2 ) = V (R 3 ) + V (D 1 ) + V (R 2 )
= V (D 1 ) + V (R 3 ) + V (R 2 )
= V (D 1) + ( V cc2 -V (D 1)) * ((R 2 + R 3) / (
Here, V (D 1 ) is the voltage applied to the first diode D 1 , V (R 2 ) is the voltage applied to the second resistor R 2 , and V (R 3 ) And the voltage applied to the resistor R 3 . In the above equation, V (R 3 ) + V (R 2 ) can be calculated by dividing the sum of the voltage applied to R 1 and the voltages applied to R 2 and R 3 according to the magnitude of the resistance. That is, V (R 3 ) + V (R 2 ) becomes (V cc 2 -V (D 1 )) * ((R 2 + R 3 ) / (R 1 + R 2 + R 3 )).
≪ When the driving switch is in an operation mode in which the driving switch is turned off, and the control line is in a high-
Next, referring to FIG. 12, a state in which the driving
<When the driving switch is in an operation mode in which the driving switch is turned off and the control line is in the low potential shorting state>
Next, referring to FIG. 13, a state in which the driving
V (N 2 ) = V (D 1 ) + V (R 2 )
= V (D 1 ) + (V cc 2 -V (D 1 )) * (R 2 / (R 1 + R 2 ))
Here, V (D 1 ) is a voltage applied to the first diode (D 1 ), and V (R 2 ) is a voltage applied to the second resistor (R 2 ). In the above equation, V (R 2 ) can be calculated by dividing the sum of the voltage applied to R 1 and the voltage applied to R 2 according to the magnitude of the resistance. That is, V (R 2 ) becomes (V cc2 -V (D 1 )) * (R 2 / (R 1 + R 2 )).
14 is a diagram showing a diagnosis table according to an embodiment of the present invention.
Referring to FIG. 14, there is shown a diagnostic table in which voltages of the second node N 2 are recorded in the two operation modes and the four operation states described with reference to FIGS. 6 to 13.
As shown in the diagnosis table, in the operation mode in which the
On the other hand, as shown in the diagnosis table, in the operation mode in which the
However, when the two operation modes are combined, the four states can be accurately diagnosed. That is, it is possible to check whether the
In other words, when the state of the
Hereinafter, a process of diagnosing the state of the control line using the diagnosis table prepared in advance by the control line diagnostic apparatus according to an embodiment of the present invention will be described.
First, the control unit turns on the
Then, the control unit turns off the driving
Next, the control unit inquires of the diagnosis table of a voltage substantially equal to the voltage of the second node N 2 measured by the
Then, the control section inquires of the voltage that is substantially the same voltage as the driving switch the second node, 150 is a measure turned in the off operation mode, the voltage measuring unit (230) (N 2) in the diagnosis table. If the voltage of the second node N 2 and the voltage of the disconnection state recorded in the diagnosis table are substantially equal to each other, the control unit can diagnose that the state of the
15 is a view schematically showing the configuration of a control line diagnostic apparatus according to another embodiment of the present invention.
Referring to FIG. 15, in comparison with the control line diagnostic apparatus according to the embodiment of the present invention shown in FIG. 1, a first
The first
The control unit may turn on the first
16 is a diagram schematically showing a configuration of a control line diagnostic apparatus according to another embodiment of the present invention.
Referring to FIG. 16, in comparison with the control line diagnostic apparatus according to the embodiment of the present invention shown in FIG. 1, a second
The second
The control unit may turn on the second
17 is a diagram schematically showing a configuration of a control line diagnostic apparatus according to another embodiment of the present invention.
Referring to FIG. 17, in comparison with the control line diagnostic apparatus according to the embodiment of the present invention shown in FIG. 1, a first
The first
The controller may turn on the first
In the above-described embodiments, the control line
In the context of the present disclosure, the control unit includes a processor, an application-specific integrated circuit (ASIC), another chipset, a logic circuit, a register, a communication modem, a data processing device, etc., And may optionally include.
In addition, at least one of the control logic of the control unit may be combined, and the combined control logic may be written in a computer-readable code system and recorded in a computer-readable recording medium.
The type of the recording medium is not particularly limited as long as it can be accessed by a processor included in the computer. As one example, the recording medium includes at least one selected from the group including a ROM, a RAM, a register, a CD-ROM, a magnetic tape, a hard disk, a floppy disk and an optical data recording apparatus.
The code system may be modulated with a carrier signal and included in a communication carrier at a specific point in time, and may be distributed and stored in a networked computer. Also, functional programs, code, and code segments for implementing the combined control logic can be easily inferred by programmers skilled in the art to which the present invention pertains.
In describing the various embodiments disclosed herein, components labeled as 'parts' should be understood as functionally distinct elements rather than physically distinct elements. Thus, each component may be selectively integrated with another component, or each component may be divided into sub-components for efficient execution of the control logic (s). It will be apparent to those skilled in the art, however, that, even if components are integrated or partitioned, the integrity of the functionality can be recognized, it is understood that the integrated or segmented components are also within the scope of the present invention.
While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not to be limited to the details thereof and that various changes and modifications will be apparent to those skilled in the art. And various modifications and variations are possible within the scope of the appended claims.
1: battery cell 10: battery pack
20: inverter 30: electric motor
100: driving circuit, relay driving circuit
110: Driving load, relay
120: first high potential node 130: first low potential node
140: control line 150: drive switch
V cc1 , V cc2 : Power GND1, GND2: Ground
200: control line diagnostic device 210: first diagnostic line
211: second high potential node 212: first diagnostic switch
220: second diagnostic line 221: second low potential node
222: second diagnosis switch 230: voltage measuring unit
N 1 : first node N 2 : second node
R 1 : first resistance R 2 : second resistance
R 3 : third resistor D 1 : first diode
Claims (10)
A first diagnostic line having a first end connected to a first node formed on the control line and a second end connected to a second high potential node and having a first resistor, a second resistor and a first diode connected in series;
A second diagnostic line having one end connected to the first node and the other end connected to a second low potential node, and having a third resistor;
A voltage measuring unit measuring a voltage of a second node formed between the first resistor and the second resistor; And
And a control unit for controlling the drive switch to set a predetermined operation mode and diagnosing the state of the control line using the voltage value of the second node measured by the voltage measurement unit in the set operation mode,
Wherein the first diode is provided in the first diagnostic line to allow the flow of current from the second high-potential node to the first node.
The control unit records the voltage value of the second node measured in the operation mode in which the drive switch is turned on and the voltage value of the second node measured in the operation mode in which the drive switch is turned off in a pre- And diagnoses the state of the control line by comparing the calculated value with the calculated value.
The state of the control line includes a high-potential short-circuit state in which the control line is short-circuited with the first high-potential node, a low-potential short-circuit state in which the control line is short-circuited with the first low- State and a normal state of the control line.
The first diagnostic line may further comprise a first diagnostic switch that is selectively turned on or off,
Wherein the control unit controls the first diagnostic switch to be turned on to diagnose the control line.
The second diagnostic line further comprises a second diagnostic switch that is selectively turned on or off,
Wherein the control unit controls the second diagnostic switch to be turned on to diagnose the control line.
And the first low-potential node and the second low-potential node are connected to the ground.
And the potential of the second high potential node is lower than the potential of the first high potential node.
And said control unit is a relay for driving said control line.
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| KR1020150120326A KR102050529B1 (en) | 2015-08-26 | 2015-08-26 | Apparatus for diagnosing state of control line |
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| KR1020150120326A KR102050529B1 (en) | 2015-08-26 | 2015-08-26 | Apparatus for diagnosing state of control line |
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| KR102050529B1 KR102050529B1 (en) | 2019-11-29 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20190084547A (en) * | 2018-01-08 | 2019-07-17 | 주식회사 엘지화학 | Apparatus for diagnosing operation voltage line |
| WO2020145768A1 (en) * | 2019-01-11 | 2020-07-16 | 주식회사 엘지화학 | Battery pack diagnosis apparatus |
| US11204387B2 (en) | 2018-01-30 | 2021-12-21 | Lg Chem, Ltd. | Apparatus for diagnosing relay driving circuit |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20130105982A (en) * | 2012-03-19 | 2013-09-27 | 주식회사 엘지화학 | Isolation resistance measurement apparatus having malfunction diagnosing function and malfunction diagnosing method using the same |
-
2015
- 2015-08-26 KR KR1020150120326A patent/KR102050529B1/en active IP Right Grant
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20130105982A (en) * | 2012-03-19 | 2013-09-27 | 주식회사 엘지화학 | Isolation resistance measurement apparatus having malfunction diagnosing function and malfunction diagnosing method using the same |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20190084547A (en) * | 2018-01-08 | 2019-07-17 | 주식회사 엘지화학 | Apparatus for diagnosing operation voltage line |
| US11204387B2 (en) | 2018-01-30 | 2021-12-21 | Lg Chem, Ltd. | Apparatus for diagnosing relay driving circuit |
| WO2020145768A1 (en) * | 2019-01-11 | 2020-07-16 | 주식회사 엘지화학 | Battery pack diagnosis apparatus |
| KR20200087618A (en) * | 2019-01-11 | 2020-07-21 | 주식회사 엘지화학 | Apparatus for diagnosing battery pack |
| CN112154339A (en) * | 2019-01-11 | 2020-12-29 | 株式会社Lg化学 | Battery pack diagnostic apparatus |
| US11513139B2 (en) | 2019-01-11 | 2022-11-29 | Lg Energy Solution, Ltd. | Battery pack diagnosis apparatus |
| CN112154339B (en) * | 2019-01-11 | 2023-10-24 | 株式会社Lg新能源 | Battery pack diagnosis apparatus, battery pack, and vehicle |
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| KR102050529B1 (en) | 2019-11-29 |
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