WO2017002527A1 - 電気回路装置 - Google Patents
電気回路装置 Download PDFInfo
- Publication number
- WO2017002527A1 WO2017002527A1 PCT/JP2016/066524 JP2016066524W WO2017002527A1 WO 2017002527 A1 WO2017002527 A1 WO 2017002527A1 JP 2016066524 W JP2016066524 W JP 2016066524W WO 2017002527 A1 WO2017002527 A1 WO 2017002527A1
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- WIPO (PCT)
- Prior art keywords
- power supply
- terminal
- voltage
- circuit
- circuit device
- Prior art date
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H11/00—Emergency protective circuit arrangements for preventing the switching-on in case an undesired electric working condition might result
- H02H11/002—Emergency protective circuit arrangements for preventing the switching-on in case an undesired electric working condition might result in case of inverted polarity or connection; with switching for obtaining correct connection
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/20—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for electronic equipment
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/08—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current
- H02H3/085—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current making use of a thermal sensor, e.g. thermistor, heated by the excess current
Definitions
- the present invention relates to an electric circuit device.
- Hybrid vehicles and electric vehicles have an increasing number of electrical components, and are equipped with a large number of connectors for electrical connection of electrical components.
- the connector terminals in these connectors may be in a so-called power-to-power state when a battery voltage is applied due to a short circuit between terminals due to foreign matter adhering to the connector terminals or incorrect wiring.
- In order to prevent the breakdown of the equipment due to the power fault it is necessary to prevent the influence on the load connected to the connector terminal and the internal electric circuit device.
- a voltage follower circuit and a derived resistor connected in parallel to the voltage follower circuit belong to the short circuit protection circuit, and a parallel circuit composed of the voltage follower circuit and the derived resistor is connected to the second output terminal on the one hand, On the other hand, it is considered to be configured to be connected to the second input terminal (Patent Document 1). And when a connector terminal has a power fault, the electric current which flows into an internal electric circuit apparatus is controlled, and damage to an electric circuit apparatus is performed.
- An electric circuit device includes a positive electrode terminal and a negative electrode terminal to which a load is connected, a power supply circuit that supplies an output voltage, and a current reverse flow that is connected between the output voltage side and the positive electrode terminal of the power supply circuit. And a switching circuit connected to the negative side terminal.
- the current backflow prevention circuit controls the switching circuit when the voltage at the positive side terminal is equal to or higher than a predetermined value, and loads the load from the positive side terminal. The current flowing through the negative electrode side terminal is cut off.
- the present invention it is possible to protect not only the internal electric circuit device connected to the connector terminal but also the load connected to the connector terminal in the event of a power fault.
- FIG. 1 is a circuit diagram of an electric circuit device according to this embodiment. Hereinafter, the configuration of the electric circuit device will be described with reference to FIG.
- a load 103 is connected between the positive terminal 100 and the negative terminal 101 of the connector.
- a current backflow prevention circuit 104 is connected to the positive terminal 100 via a resistor 110.
- the current backflow prevention circuit 104 includes an operational amplifier 105, a diode 107 connected to the output terminal of the operational amplifier 105, and a resistor 106 connected from the cathode side of the diode 107 to the negative side of the operational amplifier 105.
- a power supply circuit 108 is connected to the positive side of the operational amplifier 105.
- the operational amplifier 105 is supplied with power supply V1 and GND.
- the connection point between the output terminal of the operational amplifier 105 and the anode side of the diode 107 is connected to the gate terminal of the switching element 109.
- the switching element 109 is, for example, a MOSFET (Metal-Oxide-Semiconductor-Field-Effect-Transistor), the drain terminal of the switching element 109 is connected to the negative terminal 101 of the connector, and the source terminal of the switching element 109 is connected to GND. ing.
- a microcomputer 112 is connected to the positive terminal 100 of the connector via a resistor 111, and a connection point between the positive terminal 100 and the resistor 111 is connected to GND via a resistor 113.
- the power supply circuit 108 is used as a power source for various sensors, and an example in which a current sensor 114 is connected is shown here as an example.
- the operation of the electric circuit device will be described with reference to FIG.
- a battery voltage (not shown) (for example, 14V)
- 14V the voltage of the positive terminal 100 is supplied with power.
- the voltage value is equal to or higher than the voltage of the output voltage (for example, 5 V) of the power supply circuit 108 that performs the above.
- the output voltage of the operational amplifier 105 is changed from the output voltage (5 V) of the power supply circuit 108 to the operational amplifier 105. It changes to the voltage (0V) connected to the negative power source.
- the output voltage of the operational amplifier 105 becomes 0 V
- the voltage difference between the gate and the source of the switching element 109 becomes equal to or less than a predetermined voltage, so that the drain and source of the switching element 109 are opened, and the negative terminal 101 is connected. Cut off the flowing current. That is, the switching element 109 is controlled by using the change in the output voltage of the operational amplifier 105 due to the power supply fault of the positive terminal 100. Therefore, the load 103 can be protected from overcurrent.
- a resistance such as a thermistor whose resistance value varies depending on the temperature may be used.
- an NTC (negative temperature coefficient) thermistor is a thermistor whose resistance decreases as the temperature rises, and its resistance value is much smaller at high temperatures than at low temperatures.
- the overcurrent flowing through the thermistor can be cut off and the thermistor can be protected by the circuit operation described above.
- the current backflow prevention circuit 104 for power supply of the reference voltage from the power supply circuit 108, it is possible to prevent a current flowing into the power supply circuit 108 when the positive terminal 100 is in a power fault.
- the current backflow prevention circuit 104 provides high power supply accuracy.
- a power supply can be used.
- the accurate power supply indicates the accuracy of the output voltage of the power supply.
- the current backflow prevention circuit 104 for example, by using a power supply with an output rated value of 10V ⁇ 1% max20mA for the power supply V1, even if a current of 10mA is required for the load 103, the output rated value of 5V ⁇ 0. .5% max 5mA power supply can be used as it is, and power supply remains at 5V ⁇ 0.5%.
- the load current is supplied from the power source used for the operational amplifier 105. Therefore, by using the current backflow prevention circuit 104, a highly accurate power supply can be used for the power supply circuit 108.
- the power circuit 108 is used as a power source for various sensors, and for example, a current sensor 114 is connected thereto. If the output voltage of the power supply circuit 108 is directly connected to the load 103, if the battery voltage has a power fault at the positive terminal 100, the current flows backward to the output voltage of the power supply circuit 108, and the output voltage of the power supply circuit 108. There is concern about the failure and malfunction of various sensors connected to the. For example, even if the vehicle system is in a non-operating state (power OFF state), if the battery voltage has a power supply fault at the positive terminal 100, the above-described operation causes the sensors to malfunction and adversely affect the entire system. May affect. As in this embodiment, by using the current backflow prevention circuit 104, it is possible to prevent malfunctions and malfunctions of various sensors connected to the output voltage of the power supply circuit 108 when the positive terminal 100 has a power fault. it can.
- the electric circuit device includes a positive terminal 100 and a negative terminal 101 to which the load 103 is connected, a power supply circuit 108 that supplies an output voltage, and between the output voltage side of the power circuit 108 and the positive terminal 100. And a switching element 109 connected to the negative side terminal 101.
- the current backflow prevention circuit 104 performs switching when the voltage of the positive side terminal 100 is equal to or higher than a predetermined value.
- the element 109 is controlled to cut off the current flowing from the positive terminal 100 to the negative terminal 101 through the load 103.
- the present invention is not limited to the above-described embodiment, and other forms conceivable within the scope of the technical idea of the present invention are also included in the scope of the present invention as long as the characteristics of the present invention are not impaired. It is.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Emergency Protection Circuit Devices (AREA)
- Protection Of Static Devices (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
Description
電源回路108は、各種センサー類の電源として用いられ、ここでは一例として電流センサー114が接続されている例を示す。
コネクタ端子への異物付着による端子間ショートやコネクタの誤配線等によって、正極側端子100に、図示省略したバッテリ電圧(例えば、14V)が天絡した場合、正極側端子100の電圧は、電源供給を行う電源回路108の出力電圧(例えば、5V)の電圧以上の電圧値となる。
(1)電気回路装置は、負荷103が接続される正極側端子100及び負極側端子101と、出力電圧を供給する電源回路108と、電源回路108の出力電圧側と正極側端子100との間に接続される電流逆流防止回路104と、負極側端子101に接続されるスイッチング素子109と、を備え、電流逆流防止回路104は、正極側端子100の電圧が所定値以上である場合に、スイッチング素子109を制御して、正極側端子100から負荷103を通って負極側端子101に流れる電流を遮断する。これにより、天絡時に正極側端子100に接続されている内部の各種センサー類だけでなく、正極側端子100と負極側端子100の間に接続されている負荷103も保護することが可能となる。
101 負極側端子
103 負荷
104 電流逆流防止回路
105 オペアンプ
107 ダイオード
108 電源回路
109 スイッチング素子
Claims (5)
- 負荷が接続される正極側端子及び負極側端子と、
出力電圧を供給する電源回路と、
前記電源回路の前記出力電圧側と前記正極側端子との間に接続される電流逆流防止回路と、
前記負極側端子に接続されるスイッチング回路と、を備え、
前記電流逆流防止回路は、前記正極側端子の電圧が所定値以上である場合に、前記スイッチング回路を制御して、前記正極側端子から前記負荷を通って前記負極側端子に流れる電流を遮断する電気回路装置。 - 請求項1に記載の電気回路装置において、
前記負荷は、温度に応じて抵抗値が変動する状態検知用の抵抗である電気回路装置。 - 請求項1または2のいずれか一項に記載の電気回路装置において、
前記電源回路の前記出力電圧側に電流センサーが接続される電気回路装置。 - 請求項1に記載の電気回路装置において、
前記正極側端子から前記負荷までの配線が天絡した場合に、前記電流逆流防止回路は、前記正極側端子の電圧が所定値以上であると判定する電気回路装置。 - 請求項4に記載の電気回路装置において、
前記電流逆流防止回路は、前記正極側端子に接続されるオペアンプと、当該オペアンプの出力端子と当該オペアンプへ負帰還する接続部との間に接続されたダイオードと、を有し、
前記スイッチング回路は、前記オペアンプの出力端子と前記ダイオードとの間の電圧に基づいて制御される電気回路装置。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2017526242A JP6379294B2 (ja) | 2015-07-01 | 2016-06-03 | 電気回路装置 |
CN201680038463.4A CN107710539B (zh) | 2015-07-01 | 2016-06-03 | 电路装置 |
DE112016002551.3T DE112016002551B4 (de) | 2015-07-01 | 2016-06-03 | Elektrische schaltungsvorrichtung |
US15/736,333 US10637232B2 (en) | 2015-07-01 | 2016-06-03 | Electric circuit device |
Applications Claiming Priority (2)
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JP2015-132319 | 2015-07-01 | ||
JP2015132319 | 2015-07-01 |
Publications (1)
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WO2017002527A1 true WO2017002527A1 (ja) | 2017-01-05 |
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Application Number | Title | Priority Date | Filing Date |
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PCT/JP2016/066524 WO2017002527A1 (ja) | 2015-07-01 | 2016-06-03 | 電気回路装置 |
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US (1) | US10637232B2 (ja) |
JP (1) | JP6379294B2 (ja) |
CN (1) | CN107710539B (ja) |
DE (1) | DE112016002551B4 (ja) |
WO (1) | WO2017002527A1 (ja) |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002271183A (ja) * | 2001-03-13 | 2002-09-20 | Denso Corp | 過電圧保護回路 |
JP2008092277A (ja) * | 2006-10-02 | 2008-04-17 | Hitachi Ltd | 負荷駆動回路 |
US20100284114A1 (en) * | 2009-05-08 | 2010-11-11 | Hamilton Sundstrand Corporation | System and method to provide transient overvoltage suppression |
JP2014171346A (ja) * | 2013-03-05 | 2014-09-18 | Mitsubishi Electric Corp | 車載電子制御装置及びその給電制御方法 |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
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JPS4723846Y1 (ja) | 1968-08-21 | 1972-07-29 | ||
JPS4726649Y1 (ja) | 1969-06-13 | 1972-08-16 | ||
JP2004088956A (ja) * | 2002-07-04 | 2004-03-18 | Ricoh Co Ltd | 電源回路 |
DE10349282A1 (de) | 2003-10-23 | 2005-05-25 | Hella Kgaa Hueck & Co. | Verpol- und Überspannungsschutz für 5V-Sensoren |
DE102004053031B4 (de) | 2004-10-30 | 2007-04-26 | Phoenix Contact Gmbh & Co. Kg | Schaltungsanordnung mit einer Kurzschlußschutzschaltung |
CN102938574A (zh) * | 2012-11-09 | 2013-02-20 | 谢亚平 | 一种锂离子电池组电压均衡电路 |
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2016
- 2016-06-03 CN CN201680038463.4A patent/CN107710539B/zh active Active
- 2016-06-03 US US15/736,333 patent/US10637232B2/en active Active
- 2016-06-03 WO PCT/JP2016/066524 patent/WO2017002527A1/ja active Application Filing
- 2016-06-03 JP JP2017526242A patent/JP6379294B2/ja active Active
- 2016-06-03 DE DE112016002551.3T patent/DE112016002551B4/de active Active
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002271183A (ja) * | 2001-03-13 | 2002-09-20 | Denso Corp | 過電圧保護回路 |
JP2008092277A (ja) * | 2006-10-02 | 2008-04-17 | Hitachi Ltd | 負荷駆動回路 |
US20100284114A1 (en) * | 2009-05-08 | 2010-11-11 | Hamilton Sundstrand Corporation | System and method to provide transient overvoltage suppression |
JP2014171346A (ja) * | 2013-03-05 | 2014-09-18 | Mitsubishi Electric Corp | 車載電子制御装置及びその給電制御方法 |
Also Published As
Publication number | Publication date |
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CN107710539A (zh) | 2018-02-16 |
CN107710539B (zh) | 2019-05-28 |
US10637232B2 (en) | 2020-04-28 |
DE112016002551B4 (de) | 2024-02-29 |
JP6379294B2 (ja) | 2018-08-22 |
JPWO2017002527A1 (ja) | 2018-03-15 |
US20180191153A1 (en) | 2018-07-05 |
DE112016002551T5 (de) | 2018-03-01 |
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