WO2015072600A1

WO2015072600A1 - Apparatus for preventing battery discharge and method therefor

Info

Publication number: WO2015072600A1
Application number: PCT/KR2013/010354
Authority: WO
Inventors: 박중호
Original assignee: 볼보 컨스트럭션 이큅먼트 에이비; 박중호
Priority date: 2013-11-14
Filing date: 2013-11-14
Publication date: 2015-05-21

Abstract

The present invention provides an apparatus for preventing battery discharge, comprising: a first main relay (60) connected with a first electronic equipment group (200); a second main relay (70) connected with a second electronic equipment group (300); a start switch (20) switching an electrical connection between the battery and electronic equipment and arranged so as to be electrically connected with the first main relay and the second main relay such that the start switch electrically connects the battery with the first main relay and the battery with the second main relay when a key is turned on; and a control unit (100) for controlling the electrical connection between the first main relay and the battery, wherein the control unit cuts off the first main relay when the key is turned on and a pre-set time passes.

Description

Battery discharge prevention device and method

The present invention relates to an apparatus and method for preventing battery discharge occurring in a vehicle or equipment.

Battery discharge generally refers to a phenomenon in which electromotive force decreases due to electric current flowing from a charged battery. In other words, the battery is worn out. However, in a narrow sense, when an insulator, such as a gas, which is almost non-electrical in a strong electric field, loses insulation and a current flows into it.

Examples of such discharge phenomena include gas discharge, vacuum discharge, glow discharge, arc discharge, corona discharge, and high frequency discharge.

It is often known that a battery needs to be fully discharged before being used for a long time, but this is not true. Nickel mercury batteries or nickel cadmium batteries should be fully discharged before being fully charged for long life. But most of the recent cell phone batteries are lithium-ion batteries. This can lead to a hardened internal charge and a shortened lifespan if not charged for a long time.

The discharge of the battery is a process of discharging the electric energy charged in the battery as a current, there is a certain limit on the amount of current that can be taken out and the electromotive force. For example, a lead acid battery cannot take out a valid current when the electromotive force falls below 1.8V, and if it discharges further, there is a fear that the recovery of electromotive force by charging is impossible. Therefore, when the battery starts to discharge, it is easy to discharge again next time.

In addition, in the case of vehicle batteries, problems may occur because the electric fields (various electronic equipment and electrical devices installed in the vehicle) that do not start or use electric energy are not available unless the battery is recharged by jumping when discharged. have.

In order to prevent discharge of a vehicle battery, Korean Laid-open Patent Publication (Patent No. 2003-0082079) discloses a method for preventing battery discharge of a vehicle. This patent document relates to a method for preventing battery discharge of a vehicle, and more particularly, to quickly diagnose a failure of a generator, to prevent excessive use of the battery due to a failure of the generator, and to prevent the vehicle from being stopped due to the discharge of the battery. The present invention relates to a method for preventing battery discharge of a vehicle.

The method according to this patent document comprises the steps of: determining whether the engine is in operation; Detecting a voltage of the generator and determining that the generator is broken when the voltage of the generator is lower than the set voltage; If it is determined that the generator is out of order, sequentially determining whether each of the electric appliances is used; And sequentially blocking the electricity supplied to the respective electrical appliances, when the respective electrical appliances are in use. Preferably, after the step of determining that the generator is a failure, the method further comprises the step of shutting off the battery power when the engine is not operating. More preferably, when it is determined that the generator is out of order, the method further includes operating a warning light to warn the driver of danger.

In the prior art, a method of dividing and managing the power consumption of each electronic device has not been disclosed, and in most cases, the discharge prevention algorithm is operated when the voltage of the generator is lowered to a voltage below a predetermined level. The battery discharge prevention method is a passive and defensive method, and additionally requires a sensor for measuring the generator voltage, and has already taken a method of intervening after the battery has been discharged to some extent.

However, this method is not a method to prevent battery discharge early, and recently, as the electronic equipment used in vehicles or construction equipment has rapidly increased, there was a lack of battery power management in accordance with the power consumption rate of each electronic equipment.

In general, the ECU can activate the sleep mode, which automatically lowers the supply current after a certain period of time, thereby reducing the possibility of battery discharge. However, typical electronic equipment in a vehicle continuously consumes a large current, causing battery discharge.

The battery discharge device according to the present invention includes two main relays electrically connected to the battery of the vehicle, and the first main relay switches the connection of the battery to the electronic equipment group (high current electric appliance) having a high power consumption rate, and the second main relay The relay switches the connection of the battery with a group of electronic devices (small current electronics, ECUs, ECU-controlled parts) with relatively low power consumption.

Therefore, the battery supplies power to the large current electronics through the first main relay, and supplies power to various ECUs and the small current electronics through the second main relay. Accordingly, the controller of the present invention may prevent the battery from being discharged by blocking the first main relay when a predetermined time passes after the key on.

When the driver turns on the key, that is, when the vehicle is started or the vehicle electronic equipment is put into an operating state, the first main relay and the second main relay work together so that both the electronic system and the ECU When the key is kept on for a predetermined time, the controller controls the first main relay to block the main relay, so that power transmitted from the battery to the electronic equipment system (large current electric appliance) is interrupted.

According to the above-described apparatus and method, even if the vehicle is left in the key on state for a long time, the control unit automatically cuts off the first main relay, so that it is possible to continuously drive the ECU required for basic control of the vehicle, but the overall current consumption of the battery This reduces power consumption, prevents battery discharge, and conserves power to restart the vehicle after a significant amount of time.

1 is a circuit diagram of a battery discharge preventing apparatus according to an embodiment of the present invention.

2 is a flowchart illustrating a flow of a method for preventing battery discharge according to an embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings will be described the present invention.

However, the embodiments described below are merely to describe in detail enough to be able to easily carry out the invention by those skilled in the art to which the present invention pertains, thereby limiting the protection scope of the present invention It does not mean.

In order to clearly describe the present invention, parts irrelevant to the description are omitted and like reference numerals denote like parts throughout the specification.

Throughout the specification and claims, when a part includes a certain component, it means that it may include other components, not to exclude other components unless specifically stated otherwise.

An apparatus for preventing battery discharge according to an embodiment of the present invention may include a first main relay 60 connected to a first electronic device group 200; A second main relay 70 connected to the second electronic device group 300; Switching the electrical connection between the battery and the electronic equipment, and is arranged to be electrically connected to the first main relay, the second main relay when the key on the battery and the first main relay, the battery And a start switch 20 for electrically connecting the second main relay and a control unit 100 for controlling an electrical connection between the first main relay and the battery. If so, the first main relay is blocked.

In the apparatus for preventing battery discharge according to an embodiment of the present invention, the first main relay 60 and the second main relay 70 may serve to supply power to the electronic equipment or cut off the power supply.

Relay circuits (relays in general) are devices that apply the principle of electromagnets, and control the current flowing through the circuit to connect or disconnect the current. If a general switch circuit uses a physical force (for example, a human hand) to open and close the circuit, the relay circuit uses a small current to automatically open and close the circuit.

The first main relay 60 connects the battery 10 and the first electronic device group 200. An example of the first electronic device group may be an electronic device system of a vehicle. Electronic equipment systems cover a variety of electronic equipment and electrical devices used in vehicles. For example, lighting, power outlets, beacons, heat heaters, other convenience devices, and the like may belong to the first group of electronic devices.

The second main relay 70 connects the battery 10 and the second electronic device group 300, and the second electronic device group includes, for example, ECUs having a relatively low power consumption, parts controlled by the ECU, and small components. Current electronic equipment and the like. For example, E-ECU, V-ECU, AC controller, etc. may belong to the second electronic equipment group.

The start switch 20 switches the electrical connection between the battery and the electronic equipment. The start switch 20 is arranged to be electrically connected to the first main relay and the second main relay. When the key is on, the start switch 20 electrically connects between the battery and the first main relay and electrically connects between the battery and the second main relay.

When the start switch is turned on, the connection between the first main relay and the battery is made through the first line 40, and the connection between the second main relay and the battery is made through the second line 30.

The controller 100 controls an electrical connection between the first main relay and the battery. As shown in FIG. 1, a control unit is positioned between the start switch 20 and the first main relay, and the control unit maintains the connection of the first main relay through the third line 50 until a predetermined time T passes. To control.

The control unit cuts off the first main relay to prevent the discharge of the battery when the preset time T passes after the key on, so that the first group of electronic equipment no longer receives power from the battery. Only the electronics group will maintain the power supply from the battery.

When driving a vehicle, it is likely to be discharged due to excessive consumption of current on key on for a long time. For example, if the driver leaves the workplace with key on and goes to work the next day, the battery can be discharged. This is due to customer carelessness, but key on signals can be accidentally applied to the vehicle or equipment. For example, when the wiring between electronic devices is shorted and a key on signal is input, the electrical equipment and various ECUs consume current to discharge the battery regardless of the driver's intention. If the main relay connected to the vehicle's electronic equipment is not specifically classified by use function, power consumption rate, etc., the electronic equipment cannot be blocked efficiently at the time of key on.

One embodiment according to the present invention provides a battery discharge device that separates a first electronic device group and a second electronic device group.

The first electronic device group may be electronic devices whose power consumption rate exceeds a set power consumption rate, and the second electronic device group may be electronic devices whose power consumption rate is lower than or equal to a set power consumption rate.

The higher the power consumption of electronic equipment, the greater the risk of battery discharge upon key-on. Therefore, the electronic device group is divided and connected to the first main relay and the second main relay separately. In this case, the first main relay is connected to supply power to the electronic equipment which consumes a lot of current, and the second main relay is connected to supply power of components important for equipment control with low consumption of ECU power and current. .

In the case of classifying the electronic equipment and the main relays as described above, it is possible to effectively manage the power consumption of the vehicle electronic equipment by blocking one main relay.

When the key is turned on (S10), the start switch arranged to be electrically connected to the first main relay and the second main relay electrically connects the battery and the first main relay (S20), and the battery and the first switch. Two main relays are electrically connected (S30).

If the preset time T after the key on has elapsed, that is, if the elapsed time t after the key on exceeds the preset time T (S40), the controller controls to block the first main relay. (S50).

In the method of preventing battery discharge according to the present invention, the first main relay is connected to the first electronic equipment group whose power consumption rate exceeds the set power consumption rate, and the second main relay is the second electronic device whose power consumption rate is less than or equal to the set power consumption rate. Can be associated with a group.

The embodiments described above are merely illustrative of the principles of the invention. It is understood that modifications and variations of the arrangements and details described herein will be apparent to those skilled in the art. Therefore, it is intended that the scope of the invention be limited only by the patent claims set forth in this application and not by the specific details presented by the description and description of the embodiments herein.

Claims

A first main relay 60 connected to the first electronic device group 200;

A second main relay 70 connected to the second electronic device group 300;

Switching the electrical connection between the battery and the electronic equipment, the battery and the first main relay, the battery when the key is arranged to be electrically connected to the first main relay and the second main relay A start switch 20 for electrically connecting the second main relay; And

And a controller 100 for controlling an electrical connection between the first main relay and the battery.

And the controller cuts off the first main relay when a predetermined time elapses after the key is turned on.
The method of claim 1,

The first electronic device group 200 is electronic devices whose power consumption rate exceeds a set power consumption rate.

The second electronic device group (300) is a battery discharge preventing device, characterized in that the power consumption is less than the set power consumption rate.
When the key is on, a start switch arranged to be electrically connected to the first main relay and the second main relay, electrically connecting the battery and the first main relay, the battery and the second main relay; And

And controlling, by the controller, to block the first main relay when a predetermined time T elapses after a key is turned on.
The method of claim 3, wherein

The first main relay is connected to the first group of electronic equipment whose power consumption rate exceeds the set power consumption rate.

And the second main relay is connected to a second group of electronic devices whose power consumption rate is less than or equal to a set power consumption rate.