KR102075531B1 - Appatus for detecting overvoltage position and operating method thereof - Google Patents

Abstract

According to the present invention, provided is an apparatus for detecting a location of an overvoltage which comprises: a plurality of overvoltage detection units connected to each of a plurality of battery modules to detect an overvoltage; an overvoltage location determination unit driven by a first power supply, receiving a detection signal from each of the plurality of overvoltage detection units, and determining a location in which the overcharging has occurred among the plurality of battery modules through the received detection signal; a fault integration unit driven by the first power supply and generating a fault signal corresponding to output from the overvoltage location determination unit; and a fault maintaining unit driven by the first power supply, maintaining the fault signal of the fault integration unit, and blocking a main relay in response to the fault signal.

Description

Overvoltage position detection device and its operation method {APPATUS FOR DETECTING OVERVOLTAGE POSITION AND OPERATING METHOD THEREOF}

The present invention relates to an overvoltage position detection device and a method of operation thereof.

When a low voltage battery main regulator failed in a low voltage system, the main relay could not shut down even if the high voltage battery in the high voltage system had overcharged. While attempting to prevent overcharge by using a function of a microcomputer (MICOM) or a battery management system (BMS) cell sensing integrated circuit (IC), the main relay could not be blocked when the IC was damaged. When the main regulator blocking code was recorded due to overcharge, when the BMS sensing IC malfunctioned, it was impossible to determine which battery module was overcharged, which caused a problem of replacing the entire battery. Even when IG OFF (ignition switch-off), when overcharging occurred in the power latch section, the circuit was turned off, preventing the controller and battery protection.

Patent: 10-0154380, Registered Date: July 9, 1998, Title: Fault diagnosis and protection circuit of position detection sensor for construction machinery. Patent application: 10-2017-0067702, published date: June 16, 2014, title: battery system overvoltage protection device.

It is an object of the present invention to provide an overvoltage position detection device of a battery and a method of operation thereof.

An overvoltage position detection apparatus according to an embodiment of the present invention includes: a plurality of overvoltage detectors connected to each of a plurality of battery modules to detect an overvoltage; An overvoltage position determination unit driven by a first power source, receiving a detection signal from each of the plurality of overvoltage detection units, and determining a position at which overcharge has occurred among the plurality of battery modules through the received detection signal; And a fault integrator which is driven by the first power source and generates a fault signal corresponding to an output from the overvoltage position determiner. And a fault holding unit which is driven by the first power source, holds a fault signal of the fault integrating unit, and interrupts the main relay in response to the fault signal.

In an exemplary embodiment, a position voltage corresponding to an overvoltage position may be transmitted to a microcomputer driven by a second power source different from the first power source.

In example embodiments, each of the plurality of overvoltage detectors may include: a plurality of integrated circuits configured to monitor a voltage of at least one battery cell of a corresponding battery module and output a driving signal when an overvoltage occurs; A plurality of transistors turned on in response to the outputs of the plurality of integrated circuits; And an overvoltage generating photomoss relay connected to a positive voltage terminal of the corresponding battery module and one ends of the plurality of transistors and outputting a sensing signal corresponding to the first power source when any one of the plurality of transistors is turned on. It may include.

The method may further include a resistor and a diode connected in series between one end of each of the plurality of transistors and one end of the photomoss relay.

In example embodiments, each of the plurality of integrated circuits may include a cell sensing integrated circuit (IC) using a high voltage power supply.

In example embodiments, each of the plurality of integrated circuits may include an isolation OPAMP driven by the first power supply.

The overvoltage position determiner may generate a position voltage corresponding to a battery module in which an overvoltage has occurred by dividing a voltage of a sensing signal of each of the photomoss relays of the plurality of overvoltage detectors through a resistor. .

The fault integrator may include a comparator configured to receive the output signal of the overvoltage position determiner and generate the fault signal by comparing the received output signal with a reference voltage.

In an embodiment, the fault holding unit may block the main relay when the ignition switch is turned off.

In an embodiment, the ignition switch may further include a fault situation canceling unit for resetting the fault holding unit when the ignition switch is turned off or the power latch is turned off.

An operation method of an overvoltage position detection apparatus according to an exemplary embodiment of the present disclosure may include: detecting a position of a battery module in which an overvoltage has occurred among battery modules using a first power source; When the position of the battery module in which the overvoltage has occurred is detected, transmitting a position voltage corresponding to the overvoltage position to a microcomputer driven by a second power source independent of the first power source; And blocking the main relays connected to the battery modules by the first power source when the location of the battery module in which the overvoltage has occurred is detected.

The detecting of the position of the battery module in which the overvoltage has occurred may include: monitoring voltages of battery cells of the corresponding battery module; Turning on / off transistors according to the monitored result; And driving one photomoss relay according to on / off of the transistors to output a sense signal.

The detecting of the position of the battery module in which the overvoltage has occurred may include receiving sensing signals from photomos relays corresponding to the battery modules; And resistance distribution of the received sense signals to generate the position voltage.

The blocking of the main relay may include generating a fault signal when a position of the battery module in which the overvoltage has occurred is detected; Maintaining the fault signal; And shutting off the main relay in response to the maintained fault signal.

The overvoltage position detection apparatus and its operation method according to an embodiment of the present invention can quickly and cost-competitively through a method such as quickly detecting a fault by replacing a module by sensing a position of overcharging in which module. AS can be enabled.

In addition, the overvoltage position detection apparatus and its operation method according to an embodiment of the present invention can be implemented as a circuit that reduces the number of use of the photo coupler that is expensive, occupies a large area.

In addition, the overvoltage position detection apparatus and its operation method according to an embodiment of the present invention through the configuration to supply power to a separate system in the power latch section, by operating the controller in the power latch section of the ignition (ignition) is off The relay can be controlled.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings are provided to assist in understanding the present embodiment, and provide embodiments with a detailed description. However, technical features of the present embodiment are not limited to the specific drawings, and the features disclosed in the drawings may be combined with each other to constitute a new embodiment.
1 is a diagram illustrating an overvoltage position detecting apparatus 100 according to an exemplary embodiment of the present invention.
2 is a diagram illustrating an overvoltage detector 111 according to an embodiment of the present invention.
3 is a diagram illustrating an overvoltage position determiner 120 according to an exemplary embodiment of the present invention.
4 is a diagram illustrating an output waveform according to the divided voltage in the overvoltage position determiner 120.
5 is a diagram illustrating a fault integration unit 130 according to an embodiment of the present invention.
FIG. 6 is a diagram illustrating an OR gate or a diode replaceable with the comparator 131 of the fault integrator 130 according to the present embodiment.
7 is a flowchart illustrating a method of operating an overvoltage position detection apparatus according to an exemplary embodiment of the present disclosure.

DETAILED DESCRIPTION Hereinafter, the contents of the present invention will be described clearly and in detail so that those skilled in the art can easily carry out the drawings.

As the inventive concept allows for various changes and numerous embodiments, particular embodiments will be illustrated in the drawings and described in detail in the text. However, this is not intended to limit the present invention to a specific disclosure form, it should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention. Terms such as first and second may be used to describe various components, but the components should not be limited by the terms.

The terms may be used for the purpose of distinguishing one component from another component. For example, without departing from the scope of the present invention, the first component may be referred to as the second component, and similarly, the second component may also be referred to as the first component. When a component is referred to as being "connected" or "connected" to another component, it may be directly connected to or connected to that other component, but it may be understood that other components may exist in between. Should be. On the other hand, when a component is said to be "directly connected" or "directly connected" to another component, it should be understood that there is no other component in between.

Other expressions describing the relationship between components, such as "between" and "immediately between" or "neighboring to," and "directly neighboring to" should be interpreted as well. The terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting of the invention. Singular expressions include plural expressions unless the context clearly indicates otherwise.

In this application, the terms "comprise" or "have" are intended to indicate that there is a feature, number, step, action, component, part, or combination thereof that is implemented, and that one or more other features or numbers are present. It should be understood that it does not exclude in advance the possibility of the presence or addition of steps, actions, components, parts or combinations thereof. Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art. Terms such as those defined in the commonly used dictionaries should be construed as meanings consistent with the meanings in the context of the related art, and shall not be construed in ideal or excessively formal meanings unless expressly defined in this application. .

The overvoltage position detection apparatus according to the embodiment of the present invention may be implemented independently of the microcomputer, the main regulator, and the BMS cell sensing IC. The overvoltage position detection apparatus according to an embodiment of the present invention enables fast and cost-competitive AS through a method of quickly detecting a failure and replacing only the corresponding module by detecting a position of which module has overcharged. Can be. The overvoltage position detection apparatus according to an embodiment of the present invention may be implemented as a circuit having a high unit cost and reducing the number of use of the photo coupler that occupies a large area. The overvoltage position detection apparatus according to an embodiment of the present invention may be implemented to control a main relay by operating a controller even in a power latch section in which ignition is turned off through a configuration for supplying power to a separate system in a power latch section. have.

1 is a diagram illustrating an overvoltage position detecting apparatus 100 according to an exemplary embodiment of the present invention. Referring to FIG. 1, the overvoltage position detection apparatus 100 includes overvoltage detectors 111, 112, and 113 corresponding to each of the battery modules, an overvoltage position determiner 120, a fault integrator 130, and a fault maintainer. 140, the fault situation canceling unit 150, and the overvoltage detection power supply 160 may be included.

In an embodiment, each of the battery modules may include a plurality of battery cells connected in series. In an embodiment, the battery modules may be connected in series with each other.

Each of the overvoltage detectors 111, 112, and 113 may be implemented to use the high voltage battery cell as a power source of the overvoltage detector, detect an overvoltage situation of the high voltage battery cell, and transmit a fault condition to the low voltage system. On the other hand, although the number of the overvoltage detector shown in Figure 1 is 3, it should be understood that not limited to the present invention.

The overvoltage position determiner 120 receives the signals output from the overvoltage detectors 111, 112, and 113 and checks in which position the overvoltage situation occurs, and transmits the corresponding position to the corresponding position voltage in the microcomputer (MCU) 200. Can be implemented to transmit. The microcomputer 200 may also sense the signal of the fault maintaining unit 140 to determine whether the fault is actually a fault or whether the fault generated by the latch is maintained.

The fault integrator 130 may be implemented to integrate the fault signal to block the main relay 101 even when a fault occurs at any position.

The fault holding unit 140 may include a fault holding latch circuit for blocking the main relay 101 until a cancellation signal is input even when the fault situation is released. In an embodiment, the fault holding unit 140 may block the main relay when the ignition switch is turned off.

The fault situation canceling unit 150 may be implemented to cancel the fault situation when the IG OFF (ignition switch off) or the power latch PWR LATCH is turned off in order to cancel the maintained fault.

The overvoltage detection power supply 160 (the first power supply, 12 V) Low-voltage batteries can power modules in low-voltage systems. When the voltage source failure used in the existing low voltage occurred, the main relay could not be cut off even if the high voltage CELL overcharge occurred. The overvoltage detection power supply 160 may include a power supply unit for operating independently of the existing low voltage system when the overcharge occurs, regardless of the MCU 200 or the low voltage main power supply (second power supply).

2 is a diagram illustrating an overvoltage detector 111 according to an embodiment of the present invention. Referring to FIG. 2, the overvoltage detection unit 111 may include a plurality of overvoltage detection units. Each of the overvoltage detection units monitors overvoltage of at least one battery cell and drives transistors FET1, FET2, and FET3 that are turned on in response to the outputs of the plurality of integrated circuits IC1 to IC3. (IC1, IC2, IC3), transistors FET1, FET2, and FET3 and one Pomotos relay 111-1. On the other hand, it should be understood that the number of direct circuits and the number of transistors are not limited to those shown in FIG.

In an embodiment, the photomoss relay is connected to the positive voltage terminal of the corresponding battery module and one ends of the plurality of transistors FET1, FET2, and FET3, and one of the plurality of transistors (FET1, FET2, FET3). When is turned on may output a detection signal corresponding to the first power source.

In an embodiment, the integrated circuits IC1, IC2, and IC3 are implemented as any one of a battery sensing IC (fault generated when an overvoltage occurs), a circuit composed of a differential amplifier and a comparator, and a circuit composed of an isolated operational amplifier and comparator. Can be.

In an embodiment, the high voltage detection unit 111 has a photomos relay for each monitoring cell when the FET is driven when an overvoltage occurs after voltage sensing. However, the high voltage detector 111 may be implemented with a single photomos relay for cost reduction and component reduction. On the other hand, it should be understood that the present invention is not limited to the photomoss relay.

In example embodiments, a resistor and a diode connected in series between each one end of each of the plurality of transistors FET1, FET2, and FET3 and one end of the photoMOS relay 111-1 may be further included.

In an embodiment, IF adjustment of the photomoss relay 111-1 may be performed through a resistor.

In embodiments, reverse voltage protection and other monitoring circuitry impact reduction and current paths may be formed through the diode.

In an embodiment, the method of driving the FET when voltage sensing and overvoltage occurs may be implemented by sensing through an IC or an isolation OPAMP. In an embodiment, when using the IC, the cell of the overvoltage system may be used as a high voltage side power supply of the IC. In an embodiment, a separate power source may be used as a power source for the integrated circuits IC1, IC2, and IC3 when voltage sensing is performed using the isolated OPAMP.

In an exemplary embodiment, two or more cell voltage sensing circuits may be integrated in the circuit configuration of the overvoltage detector 111 to use one photo-MOS relay 111-1.

3 is a diagram illustrating an overvoltage position determiner 120 according to an exemplary embodiment of the present invention. The fault generation position may be determined by resistance distribution of voltages output through the photomoss relays of the plurality of overvoltage detectors.

In an embodiment, the fault occurrence position where the overvoltage is generated may be determined by analog sensing the voltage divided by the resistor.

According to an embodiment of the present disclosure, as a reference to four modules, various voltage sensing tables may be configured by placing a higher bit and a lower bit of a fourth module of the first to fourth modules.

4 is a diagram illustrating an output waveform according to a divided voltage in the overvoltage position determiner 120. In the case of various outputs, the configuration can be repeated by repeating the configuration or reducing the number of channels as shown in FIG. 4.

Assuming that the overvoltage detector outputs the photomoss relays as FLT1 to 4 and is applied like the waveform shown in FIG. 4, the overvoltage position can be determined by analog sensing as the right waveform for each possible case.

5 is a diagram illustrating a fault integration unit 130 according to an embodiment of the present invention. When no overvoltage occurs, the output of the overvoltage position determining unit 120 may generate a voltage equal to or greater than 1 / case * module voltage when one or more outputs are generated.

In an embodiment, the fault integrator 130 may include a comparator 131 that receives the output signal of the overvoltage position determiner 120 and generates a fault signal by comparing the received output signal with a reference voltage. have.

In an exemplary embodiment, when the output of the overvoltage position determining unit 130 is connected to the + terminal when the voltage of the 1 / Case * module is set as the comparison voltage at the − terminal of the comparator 131, the fault integrating unit is generated when one or more overcharge occurs. The output of 130 may be at a high level (H).

6 is a diagram illustrating an OR gate or a diode replaceable with the comparator 131 of the fault integrator 130 according to the present exemplary embodiment.

7 is a flowchart illustrating a method of operating an overvoltage position detection apparatus according to an exemplary embodiment of the present disclosure. 1 to 7, the operation method of the overvoltage position detection apparatus may proceed as follows.

The overvoltage position may be detected among the battery modules using the first power source (system separate power source) (S110). When the overvoltage position is detected, a position voltage corresponding to the microcomputer (MCU) driven by the second power source different from the first power source may be transmitted (S120). The detecting of the position of the battery module having an overvoltage may include receiving sensing signals from photomos relays corresponding to battery modules, and resistor distribution of the received sensing signals to generate the position voltage. When the overvoltage position is detected, the main relay connected to the battery may be blocked (S130). The blocking of the main relay may include generating a fault signal, maintaining the fault signal, and responsive to the retained fault signal when the position of the battery module in which the overvoltage has occurred is detected. And blocking the main relay.

The steps and / or actions according to the invention may occur simultaneously in different embodiments in different order, in parallel, or for other epochs, etc., as would be understood by one skilled in the art. Can be.

In some embodiments, some or all of the steps and / or actions may be directed to instructions, programs, interactive data structures, clients, and / or servers stored on one or more non-transitory computer-readable media. At least some may be implemented or performed using one or more processors. One or more non-transitory computer-readable media may be illustratively software, firmware, hardware, and / or any combination thereof. In addition, the functionality of the "module" discussed herein may be implemented in software, firmware, hardware, and / or any combination thereof.

One or more non-transitory computer-readable media and / or means for implementing / performing one or more operations / steps / modules of embodiments of the present invention may be used in application-specific integrated circuits (ASICs), standard integrated circuits, A controller that performs appropriate instructions, including a microcontroller, and / or an embedded controller, field-programmable gate arrays (FPGAs), complex programmable logic devices (CPLDs), and the like. Does not.

The overvoltage position detection apparatus and its operation method according to an embodiment of the present invention can be stably enhanced in function and ensure redundancy. In addition, the overvoltage position detection apparatus and its operation method according to an embodiment of the present invention, since only IF is tuned to the photocoupler driving, by setting the current flowing through the input diode of the photocoupler to reduce the number of photo couplers to one, and resistance It can be provided with a circuit capable of position sensing only. As a result, it is possible to check where the overcharge occurs in the battery module from the analog sensed voltage value.

The overcharge position detection device and its operation method according to an embodiment of the present invention to enhance the functional stability by blocking the main relay when the overcharge occurs independently of the main regulator, MCU, BMS CELL SENSING IC in the system that operates even if IG is OFF Can be.

In addition, the overcharge position detection apparatus and its operation method according to an embodiment of the present invention, it is possible to determine which battery module in the overcharge occurs using a circuit composed of a resistor, and thus the fault location quickly when the AS is required Determine the battery module and replace only the corresponding battery module. This enables customers to quickly and inexpensively perform AS and allow OEMs to replace only the corresponding module instead of replacing the entire battery, thereby providing reasonable customer response.

In addition, the overcharge position detection apparatus and its operation method according to an embodiment of the present invention can increase the competitiveness of the OEM by reducing the number of photo-coupler parts of relatively expensive price can finally increase the competitiveness of the OEM.

On the other hand, the contents of the present invention described above are only specific embodiments for carrying out the invention. The present invention will include not only specific and practically usable means per se, but also technical ideas as abstract and conceptual ideas that can be utilized in future technologies.

100: overvoltage position detection device
111, 112, and 113: overvoltage detector
120: overvoltage position determination unit
130: fault integration
140: fault holding part
150: fault status termination
200: micom
101: main relay
160: power supply for overvoltage detection

Claims (14)

A plurality of overvoltage detectors connected to each of the plurality of battery modules to detect an overvoltage;
An overvoltage position determination unit, driven by a first power source, receiving a detection signal from each of the plurality of overvoltage detection units, and determining a position at which overcharge occurs among the plurality of battery modules through the received detection signal; And
A fault integrator, which is driven by the first power source and generates a fault signal corresponding to an output from the overvoltage position determiner; And
A fault holding part which is driven by the first power source, holds a fault signal of the fault integrator, and interrupts the main relay in response to the fault signal;
A position voltage corresponding to an overvoltage position is transmitted to a microcomputer driven by a second power source different from the first power source,
And the fault holding unit cuts off the main relay when an ignition switch is turned off. delete The method of claim 1,
Each of the plurality of overvoltage detectors,
A plurality of integrated circuits for monitoring a voltage of at least one battery cell of a corresponding battery module and outputting a driving signal when an overvoltage occurs;
A plurality of transistors turned on in response to the outputs of the plurality of integrated circuits; And
An overvoltage generating photomos relay connected to a positive voltage terminal of the corresponding battery module and one ends of the plurality of transistors and outputting a sensing signal corresponding to the first power source when any one of the plurality of transistors is turned on; An overvoltage position detection device comprising. The method of claim 3, wherein
And a resistor and a diode connected in series between one end of each of the plurality of transistors and one end of the photomoss relay. The method of claim 3, wherein
Each of the plurality of integrated circuits comprises a cell sensing integrated circuit (IC) using a high voltage power supply. The method of claim 3, wherein
Each of the plurality of integrated circuits comprises an isolated operational amplifier (OPAMP) driven by the first power supply. The method of claim 3, wherein
The overvoltage position determination unit,
And distributing the detection signals of the photomoss relays of the plurality of overvoltage detectors through a resistor to generate a position voltage corresponding to the battery module in which the overvoltage has occurred. The method of claim 7, wherein
The fault integration unit,
And a comparator configured to receive the output signal of the overvoltage position determiner and generate the fault signal by comparing the received output signal with a reference voltage. delete The method of claim 1,
And an error condition canceling unit for resetting the fault holding unit when an ignition switch is turned off or a power latch is turned off. In the operating method of the overvoltage position detection device:
Detecting a location of a battery module in which an overvoltage has occurred among the battery modules using a first power source;
When the position of the battery module in which the overvoltage has occurred is detected, transmitting a position voltage corresponding to the overvoltage position to a microcomputer driven by a second power source independent of the first power source; And
Disconnecting a main relay connected to the battery modules by the first power source when the location of the battery module in which the overvoltage has occurred is detected,
The blocking of the main relay may include disconnecting the main relay when an ignition switch is turned off. The method of claim 11,
Detecting the position of the battery module in which the overvoltage has occurred,
Monitoring the voltages of the battery cells of the corresponding battery module;
Turning on / off transistors according to the monitored result; And
Driving one photomoss relay in accordance with the on / off of the transistors to output a sense signal. The method of claim 12,
Detecting the location of the battery module overvoltage generated,
Receiving sensing signals from photomos relays corresponding to the battery modules; And
Resistance distribution of the received sense signals to generate the position voltage. The method of claim 11,
Blocking the main relay,
Generating a fault signal when a position of the battery module in which the overvoltage has occurred is detected;
Maintaining the fault signal; And
Blocking the main relay in response to the maintained fault signal.

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