System for controlling sudden unintended acceleration of electric vehicle

Abstract

The present invention relates to a system for controlling sudden unintended acceleration of an electric vehicle, the system comprising: a sudden unintended acceleration detection unit for detecting the velocity of the vehicle from an acceleration sensor, comparing same with a preconfigured velocity, and confirming sudden unintended acceleration if same is higher than the preconfigured velocity; a battery module including a battery pack configured by multiple battery cells and a power relay for controlling the supply of electrical energy to the battery pack or from the battery pack to the outside; a driving motor for receiving electric energy from the battery module and transferring driving power to vehicle wheels; a contact unit for connecting the battery module and the driving motor or disconnecting same; an emergency switch unit for activating the contact unit; and a sudden unintended acceleration control means configured such that, if sudden unintended acceleration is detected by the user or the sudden unintended acceleration detection unit, the user turns off the emergency switch, and the contact unit thus block electric energy, thereby stopping the supply of electric energy to the driving motor. The prevent invention is advantageous in that if the operator manually presses the emergency control button during a sudden unintended acceleration, switching of the high-voltage direct current (DC) contact unit is released, and the AC driving motor is thus controlled to lose driving power. At the same time, abrupt braking can be prevented by the remaining inertia, thereby improving safety substantially. Besides the AC driving motor, the steering device and the braking device can operate normally such that very safe and efficient results can be derived during a sudden unintended acceleration. Even if the steering device and the braking device cannot be manipulated due to accident impacts, it is possible to prevent the user from panicking due to the abrupt acceleration due to the sudden unintended acceleration, and to prevent large-scale accidents which would otherwise occur if the vehicle causes a series of collisions or rushes into nearby pedestrians, thereby improving safety.

Description

Electric vehicle sudden acceleration control system

[0001] The present invention relates to a sudden acceleration control system for an electric vehicle, and more particularly, to a sudden acceleration control system for an electric vehicle that enables a driver to control sudden acceleration when sudden acceleration of the electric vehicle occurs.

[0002] As the climate crisis caused by climate change has become more serious, interest in environmental pollution and environmental friendliness has increased worldwide, leading to stronger regulations on internal combustion engine vehicles and increased interest in eco-friendly vehicles.

[0003] Eco-friendly vehicles such as hybrids and electric vehicles are rapidly spreading, and the electric vehicle market in particular is growing rapidly as the government is providing policy support for electric vehicles as they are completely eco-friendly vehicles.

[0004] The widespread adoption and rapid growth of electric vehicles has led to various problems. In particular, sudden acceleration accidents can cause personal and property damage.

[0005] Sudden acceleration of these electric vehicles is known to have various causes, and in particular, it is known that sudden acceleration of unknown causes can occur due to driver malfunction, unknown vehicle defects, or collisions.

[0006] However, due to the characteristics of the AC drive motor used in electric vehicles, there was a problem in that when rapid acceleration was performed, the speed increased rapidly and reached the maximum speed, making it impossible to operate the vehicle's braking, steering, or turning off the power switch. In addition, there was a problem in that when rapid acceleration was already in progress, sudden acceleration could not be controlled by software, which caused an accident.

[0007] In addition, the sudden acceleration of electric vehicles occurs in a short period of time, making it difficult to detect and respond to the momentary danger. Therefore, when sudden acceleration occurs, many casualties and property damage occur, and it is difficult to identify the cause of sudden acceleration, making it difficult to rescue victims.

[0008] The problem to be solved by the present invention is to provide a sudden acceleration control system for an electric vehicle that can reduce human and material damage by controlling sudden acceleration with software as well as physical means even in a state of sudden acceleration.

[0009] The present invention relates to a sudden acceleration control system for an electric vehicle, and the sudden acceleration control system for an electric vehicle comprises: a sudden acceleration detection unit that detects a speed of a vehicle from an acceleration sensor, compares the speed with a preset speed, and determines that sudden acceleration occurs when the speed is faster than the preset speed; a battery module that includes a battery pack having a plurality of battery cells and a power relay that controls the supply of electric energy to the battery pack or from the battery pack to the outside; a drive motor that receives electric energy from the battery module and transmits driving power to the wheels of the vehicle; and a contactor that connects or blocks the connection between the battery module and the drive motor, and an emergency switch that operates the contactor; When a user or the sudden acceleration detection unit detects sudden acceleration, the user operates the emergency switch to off to block the electric energy from the contactor, thereby stopping the supply of electric energy to the drive motor.

[0010] In addition, the present invention includes a junction box provided between the power relay and the driving motor, and an inverter provided between the junction box and the driving motor; and the contactor includes a first coil and a second coil that generate a magnetic force internally from electric energy provided from the outside, a contact terminal connected to the first coil and the second coil, and a constant power supply unit that provides electric energy to the first coil and the second coil, and is provided as a bipolar contact type between the power relay and the junction box, so that a magnetic force is selectively generated in the first coil and the second coil according to the on / off state of the emergency switch, so that the first connection line connected to the power relay and the second connection line connected to the junction box can be energized and disconnected through the contact terminal, respectively.

[0011] In addition, in the On state of the emergency switch, the first coil and the second coil are brought into contact with the contact terminal to provide electric energy to the power relay through the driving motor, the inverter, and the junction box, and the regenerative braking means may be included to supply the electric energy from the power relay to the battery module and charge the battery module.

[0012] In addition, in the On state of the emergency switch, the first coil and the second coil are brought into contact with the contact terminals to rapidly charge the battery module, and a rapid charging means is included that supplies electric energy to the power relay through the junction box and charges the battery module by supplying it from the power relay.

[0013] In addition, in the On state of the emergency switch, the slow charger that converts electric energy into direct current (DC) by contacting the first coil and the second coil with the contact terminals, a low voltage direct current converter (LDC) that converts it into low voltage, and a slow charger relay (OBCRelay) connected to the slow charger between the contactor and the junction box, and a slow charging means that supplies electric energy to the power relay through the junction box and supplies it to the battery module from the power relay to charge the battery module may be included.

[0014] The present invention relates to a sudden acceleration control system for an electric vehicle, and can exhibit the following effects.

[0015] First, according to the sudden acceleration control system of the electric vehicle of the present invention, when the driver presses the emergency control button during sudden acceleration, the high-voltage DC (direct current) contactor is released and driving power is lost, but at the same time, sudden braking can be prevented by movement due to the remaining inertia, so there is an effect of greatly improving safety.

[0016] Secondly, according to the sudden acceleration control system of the electric vehicle of the present invention, since the steering device and brake device, such as the AC drive motor, operate normally and steering is possible during sudden acceleration, safety is improved and efficiency is increased.

[0017] Thirdly, according to the sudden acceleration control system of the electric vehicle of the present invention, when an accident occurs, the user's fear due to sudden acceleration due to impact in a state where the steering device and brake device cannot be operated, and a large-scale accident such as a chain collision or a sudden acceleration that causes the vehicle to run into nearby people can be prevented, thereby improving safety.

[0018] The effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the description of the claims.

[0019] FIG. 1 is a schematic diagram showing one embodiment of a drive motor control system for an electric vehicle according to the present invention.

[0020] FIG. 2 is a block diagram showing an embodiment of a sudden acceleration control system for an electric vehicle according to the present invention.

[0021] Figure 3 is an enlarged view of a part of Figure 2.

[0022] Figure 4 is a block diagram showing the operation during driving (discharging) according to the present invention.

[0023] Figure 5 is a block diagram showing the operation of the present invention when the emergency switch is turned OFF during a sudden acceleration.

[0024] Figure 6 is a block diagram showing the braking operation of the present invention.

[0025] Figure 7 is a block diagram showing the operation of the rapid charging of the present invention.

[0026] Figure 8 is a block diagram showing the operation of the slow charging of the present invention.

[0027] [Explanation of symbols]

[0028] 10: Battery module

[0029] 20: Drive motor

[0030] 30: Junction box

[0031] 40: Inverter

[0032] 50: Emergency stop means

[0033] 60: Rapid charger

[0034] 70: Slow charger

[0035] Hereinafter, with reference to the attached drawings, embodiments of the present invention will be described in detail so that those skilled in the art can easily practice the present invention. The present invention may be implemented in various different forms and is not limited to the embodiments described herein. In the drawings, parts irrelevant to the description have been omitted for clarity of description, and the same reference numerals designate identical or similar components throughout the specification.

[0036] In addition, the size and thickness of each component shown in the drawing are arbitrarily shown for convenience of explanation, so the present invention is not necessarily limited to what is shown.

[0037] In the present invention, “on” means located above or below the target member, and does not necessarily mean located above with respect to the direction of gravity.

[0038] Terms such as first, second, A, and B may be used to describe various components, but these components should not be limited by these terms. These terms are used solely to distinguish one component from another.

[0039] For example, without departing from the scope of the present invention, a first component could be referred to as a second component, and similarly, a second component could also be referred to as a first component. The term and / or includes any combination of a plurality of related described items or any one of a plurality of related described items.

[0040] When it is said that a component is "connected" or "connected" to another component, it should be understood that it may be directly connected or connected to that other component, but there may also be other components in between.

[0041] On the other hand, when it is said that a component is "directly connected" or "directly connected" to another component, it should be understood that there are no other components in between.

[0042] The terminology used in this application is solely for the purpose of describing specific embodiments and is not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly dictates otherwise.

[0043] In this application, terms such as “include” or “have” are intended to specify the presence of a feature, number, step, operation, component, part or combination thereof described in the specification, but should be understood not to exclude in advance the possibility of the presence or addition of one or more other features, numbers, steps, operations, components, parts or combinations thereof.

[0044] Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs.

[0045] Terms defined in commonly used dictionaries should be interpreted to have a meaning consistent with their meaning in the context of the relevant technology, and will not be interpreted in an idealized or overly formal sense unless expressly defined in this application.

[0046] Additionally, throughout the specification, when a part is said to be "connected" to another part, this includes not only cases where it is "directly connected" but also cases where it is "indirectly connected" with another part in between.

[0047] FIG. 1 is a schematic diagram showing an embodiment according to a drive motor control system of an electric vehicle according to the present invention, FIG. 2 is a block diagram showing an embodiment according to a sudden acceleration control system of an electric vehicle according to the present invention, FIG. 3 is a partial enlarged view showing a part of FIG. 2, FIG. 4 is a block diagram showing the operation during driving (discharging) according to the present invention, FIG. 5 is a block diagram showing the operation when the emergency switch is turned OFF during sudden acceleration according to the present invention, FIG. 6 is a block diagram showing the operation during braking according to the present invention, FIG. 7 is a block diagram showing the operation during rapid charging according to the present invention, and FIG. 8 is a block diagram showing the operation during slow charging according to the present invention.

[0048] Referring to FIGS. 1 to 3, an embodiment of a sudden acceleration control system for an electric vehicle according to the present invention will be described. The sudden acceleration control system for an electric vehicle includes a sudden acceleration detection unit (drawing number not assigned) that detects the speed of a vehicle from an acceleration sensor, compares it with a preset speed, and determines that sudden acceleration occurs if the speed is faster than the preset speed, a battery module (10) including a battery pack (11) having several battery cells, and a power relay (12) that controls the supply of electric energy to the battery pack (11) or from the battery pack (11) to the outside, a drive motor (20) that receives electric energy from the battery module (10) and transmits driving power to a vehicle tire (21), a contactor (53) that blocks or connects the connection between the battery module (10) and the drive motor (20), and an emergency switch (52) that operates the contactor (53). When a user or the sudden acceleration detection unit detects sudden acceleration, the user turns off the emergency switch (52). It includes a sudden acceleration control means that operates to cut off the electric energy in the contactor (53) and thereby stop the supply of electric energy to the driving motor (20).

[0049] The vehicle control device can control the steering device and braking device of an electric vehicle (vehicle) by the vehicle control system.

[0050] The sudden acceleration detection unit can compare the speed of the vehicle detected by the acceleration sensor with a preset speed and determine that it is sudden acceleration if it is faster than the preset speed. This sudden acceleration detection unit is already a known technology, so a detailed description will be omitted.

[0051] The battery module (10) may include a battery pack (11) in which several high-voltage batteries are connected to each other, and a power relay (12) that stably supplies or cuts off battery power between the battery pack (11) and an inverter (40) described later.

[0052] The power relay (12) is a power relay assembly, and is installed inside electric and hybrid vehicles that generate power using batteries. The power relay is located between the battery pack (11) and the inverter (40) and is a module composed of relays, resistors, etc., and serves to stably supply or cut off battery power to the vehicle's power system and protect the vehicle's power system when an accident current occurs.

[0053] The drive motor (20) is equipped as an AC drive motor and can be included as a drive means (20, 21) that receives electric energy (power) from the battery module (10) and transmits driving force to the drive unit of the vehicle, i.e., tires (21), etc. to move the electric vehicle.

[0054] Here, the drive motor is used in an electric vehicle to transmit the driving force of one of the rear AC drive motor and the front AC drive motor, and in some cases, the AC drive motor is driven in a dual manner, and the difference between the main AC drive motor and the auxiliary AC drive motor can be provided to have a difference in capacity of about 1 / 4 in most cases.

[0055] In addition, the drive motor may have the same number, steps, components, parts or combinations thereof, or may have additional features, even if the main AC drive motor is located at the rear and the auxiliary AC drive motor is located at the front, or vice versa. The general operation of such drive motors is already known technology, so a detailed description thereof will be omitted.

[0056] The junction box (30) is provided to supply or cut off electric energy (power) provided through the battery module (10) between the power relay (12) and the driving motor (20) to the vehicle, and is generally provided as a junction box for high voltage.

[0057] The junction box (30) can supply high voltage power when the inverter (40) needs to be operated, and can cut off the high voltage power when the inverter (40) is not in use.

[0058] An inverter (40) is installed between the junction box (30) and the driving motor (20), and the inverter converts the high-voltage electric energy (power) supplied from the battery module (10) to drive the driving motor (20).

[0059] Such an inverter (40) may include a battery module and a DC link including a plurality of resistance elements each connected in series, and a plurality of power semiconductor pairs connected in series that switch DC power supplied from the battery module to convert it into AC power and transmit the converted AC power to a motor.

[0060] The sudden acceleration control means (50) can cut off the supply of electric energy to the driving motor (20) by cutting off the electric energy from the contactor (53) by turning off the emergency switch (52) by the user. The sudden acceleration control means may include a constant power supply unit (51), an emergency switch (52), and a contactor (53).

[0061] The constant power supply unit (51) is equipped with a 12V battery and can supply electric energy to the contactor (53). An emergency switch (52) that connects or disconnects the supply of electric energy between the constant power supply unit (51) and the contactor (53) may be equipped.

[0062] An emergency switch (52) is installed inside the vehicle, and can supply or release current provided from the constant power supply (51) to or from the contactor (53) through the user's On / Off operation.

[0063] This emergency switch (52) is turned on in normal situations, i.e., situations other than sudden acceleration, and can supply electric energy supplied from the constant power supply (51) to the contactor (53).

[0064] The emergency switch (52) may include a current terminal (523) that conducts and releases current between a first contact point (521) connected to a constant power source (51) and a second contact point (522) connected to a first coil (531) of a contactor (53).

[0065] In addition, the constant power supply unit (51) is connected to the first contact point (521) and the second coil (532), so that when the emergency switch (52) contacts the first contact point (521) and the second contact point (522) with the current-carrying terminal (523), the electric energy in the constant power supply unit (51) can be supplied to the contactor (53).

[0066] Conversely, if the user becomes aware of the occurrence of sudden acceleration or if the sudden acceleration detection unit detects it and notifies the user, the user can operate the emergency switch (52) to Off to cut off the electric energy supplied from the constant power supply unit (51) and cut off the power supplied to the contactor (53).

[0067] The contactor (53) has a first coil (531) and a second coil (532) that generate a magnetic force internally from electric energy provided from the outside, a contact terminal (535) connected to the first coil (531) and the second coil (532), and can receive electric energy from a constant power source (51) to the first coil (531) and the second coil (532).

[0068] The contactor (53) selectively generates a magnetic force in the first coil (531) and the second coil (532) depending on the on / off state of the emergency switch (52), so that the first connection line (533) connected to the power relay (12) and the second connection line (534) connected to the junction box (30) can be connected and disconnected through the contact terminal (535), respectively.

[0069] The contactor (53) may be provided as a bipolar contact type between the power relay (12) and the junction box (30). The contactor (53) is a high-voltage DC contactor, and has a rated voltage of 1,000 VDC and a rated current of 250 A to 300 A, which may be advantageous for rapid charging, and may prevent damage to high-voltage cables and high-voltage devices, thereby improving safety.

[0070] For example, referring to FIG. 4, as shown in the normal driving state of the electric vehicle according to the present invention, in a normal driving state, the emergency switch (52) is in the On state and electric energy is supplied from the constant power supply unit (51) so that power can be supplied to the contactor (53).

[0071] Electrical energy is supplied to the first coil (531) and the second coil (532) within the contactor (53), so that a magnetic force is generated in the first coil (531) and the second coil (532), and the contact terminal (535) comes into contact with the first connection line (533) and the second connection line (534), so that the electrical energy of the battery pack (11) can be supplied to the driving means (20, 21) through the junction box (30) by the contactor (53).

[0072] Accordingly, in normal driving conditions, electric energy can be transmitted through the battery pack (11) and the stabilized electric energy can be transmitted through the power relay (12) to the junction box (30) and inverter (40) through the contactor (53).

[0073] After this, the electric energy converted from direct current (DC) to three-phase alternating current (AC) by the inverter (40) is transmitted to the driving means (20, 21), i.e., the driving motor (20), so that the electric energy can be converted into kinetic energy by the driving motor (20) and provided to the tire (21).

[0074] Accordingly, all basic driving functions of an electric vehicle can be performed smoothly, and discharge (driving) and charging can be possible through the bipolar contact design of the contactor (53) even during driving by regenerative braking.

[0075] Meanwhile, referring to FIG. 5, the emergency control in case of sudden acceleration of the sudden acceleration control system of the electric vehicle of the present invention will be described. If sudden acceleration occurs during normal driving or when starting after stopping, the user can manually operate the emergency switch (52) to Off to operate the contactor (53).

[0076] When the user turns the emergency switch (52) to Off, the electric energy supplied from the constant power supply (51) to the contactor (53) is disconnected from the first contact point (521) and the second contact point (522) by the current-carrying terminal (523), so that the electric energy is not supplied.

[0077] In addition, since electric energy, i.e., power, is not supplied to the contactor (53), no magnetic force is generated in the first coil (531) and the second coil (532) within the contactor (53), and the contact terminal (535) is not in contact (released) at the first connection line (533) and the second connection line (534), so that the electric energy provided from the power relay (12) to the junction box (30) can be cut off before being provided to the junction box (30).

[0078] In addition, the power source provided by the driving motor (20) is eliminated, so driving power is not generated from the driving motor (20).

[0079] According to this, by blocking the electric energy provided as direct current (DC) before converting it to three-phase alternating current (AC), the failure of the inverter (40) and the driving motor (20) can be prevented in advance, thereby improving durability.

[0080] In addition, since the driving motor (20) loses driving power and the vehicle progresses only by inertia due to acceleration, it is possible to prevent sudden acceleration caused by sudden acceleration, thereby improving safety. Furthermore, in such cases, the use of the braking device and steering device is possible, so that the user can safely stop the vehicle, and since braking is possible, there is an effect that stability can be further improved.

[0081] Here, the emergency switch (52) can be provided so that it can be used from the driver's seat in the vehicle, and can be installed with a protective cover on the left side of the steering wheel to prevent accidental operation in daily life and to enable quick use in case of sudden acceleration, thereby improving stability.

[0082] A rapid charger (60) is a device that rapidly charges a battery module and provides electric energy provided from outside to a junction box (30) to rapidly charge an electric vehicle with high efficiency using a voltage level of 800 V required for the battery module (10).

[0083] A slow charger (70) is a charger installed inside an eco-friendly vehicle, which converts electric energy supplied from a commercial alternating current (AC) power system into direct current (DC) and can perform charging control according to the characteristics of a battery (300).

[0084] A slow charger (70) is a device that receives electric energy (e.g., AC power) from an electric vehicle charging facility (EVSE, Electric Vehicle Supply Equipment) and charges a high-voltage battery through a portable charging cable (ICCB, In-Cable Control Box).

[0085] This slow charger (70) is connected between the contactor (53) and the junction box (30) and can provide electric energy received from the outside to the battery module (10).

[0086] The slow charger (70) performs charging after the output terminal is connected to the battery module (10). When the slow charger (70) is not performing charging, the slow charger (70) uses a relay to block high voltage for the user's safety.

[0087] Meanwhile, the output terminal protection method of the slow charger (70) is such that the output terminal protection device of the slow charger (OBC, On Board Charger) compares the voltage difference between the output voltage of the slow charger (70) and the voltage of the battery with a threshold value, and when the voltage difference is lower than the threshold value, the slow charger relay (OBC Relay) is driven to connect the slow charger (70) and the battery module (10). In addition, after the slow charger (70) and the battery module (10) are connected, the slow charger (70) can transmit to the battery module (10) to perform charging.

[0088] Additionally, the slow charger (70) may be equipped with an LDC (Low DC-DC Converter) that converts high voltage into a low voltage of 12 V and supplies power to a low voltage battery or each electrical component of the vehicle.

[0089] These LDC and slow charger relays can be connected between the contactor (53) and the junction box (30) to connect the slow charger (70) and serve as a voltage protection means (80) to protect the electric energy supplied to the battery module (10) through the slow charger (70).

[0090] Meanwhile, referring to FIG. 6, the regenerative braking means of the present invention is described.

[0091] In the On state of the emergency switch (52), the first coil (531) and the second coil (532) come into contact with the contact terminal (535) to provide electric energy to the power relay (12) through the drive motor (20), inverter (40), and junction box (30), and supply the electric energy from the power relay (12) to the battery pack (11) to charge the battery pack.

[0092] Meanwhile, the regenerative braking means by the contactor (53) is effective in discharging (driving) and charging during driving due to the bipolar contact design.

[0093] Meanwhile, referring to FIG. 7, the rapid charging means of the present invention is described. In the on state of the emergency switch (52), the first coil (531) and the second coil (532) contact the contact terminal (535) to supply electric energy to the power relay (12) through the rapid charger (60) and the junction box (30), and the power relay (12) supplies the energy to the battery pack (11), thereby rapidly charging the battery pack (11).

[0094] At this time, since a high voltage may flow during rapid charging, for example, a high voltage of 800 VDC may flow by stepping up from 400 VDC. Accordingly, since the contactor (53) is equipped with a rated voltage of 1,000 VDC and a rated current of 250 A to 300 A, it is possible to prevent damage or malfunction of high-voltage cables, high-voltage devices, etc., thereby further improving stability.

[0095] Meanwhile, referring to FIG. 8, the slow charging means of the present invention will be described. In the on state of the emergency switch (52), the first coil (531) and the second coil (532) are in contact with the contact terminal (535), and the slow charging means is a slow charger (70), a low voltage DC-Dc converter (LDC) that reduces the output voltage, an on-board slow charger (OBC) that is built into the vehicle while it is running or parked and receives electric energy from an external power source to charge the battery, and a junction box (30) that supplies electric energy to the power relay (12), and supplies the power relay (12) to the battery pack (11) to charge the battery pack (11).

[0096] Using these onboard slow chargers can shorten the charging time of electric vehicles, increase convenience, and improve vehicle performance and efficiency.

[0097] According to the electric vehicle's sudden acceleration control auxiliary device and control method of the present invention, when the driver directly presses the emergency control button during sudden acceleration, the high-voltage DC (direct current) contactor is switched off to control the AC drive motor, thereby losing driving power and preventing sudden braking by movement due to the remaining inertia, so that safety is greatly improved, and the steering device and brake device other than the AC drive motor can operate normally, so that very safe and efficient results can be achieved in the event of sudden acceleration, and even if the steering device and brake device become inoperable due to an accident impact, the user's fear due to sudden acceleration and a large-scale accident such as a chain collision or running into nearby people due to sudden acceleration can be prevented, so that safety is improved.

[0098] The foregoing description of the present invention is for illustrative purposes only, and those skilled in the art will readily appreciate that the present invention can be readily modified into other specific forms without altering the technical spirit or essential characteristics of the present invention. Therefore, the embodiments described above should be understood as illustrative in all respects and not restrictive. For example, each component described as a single entity may be implemented in a distributed manner, and similarly, components described as distributed may be implemented in a combined manner.

[0099] The scope of the present invention is indicated by the claims described below, and all changes or modifications derived from the meaning and scope of the claims and their equivalent concepts should be interpreted as being included in the scope of the present invention.

[0100] Although the preferred embodiments of the present invention have been described above, the present invention is not limited thereto, and various modifications can be made within the scope of the patent claims, the detailed description of the invention, and the attached drawings, and it is obvious that this also falls within the scope of the present invention.

[0101]

Claims

1. A sudden acceleration detection unit that detects the vehicle speed from an acceleration sensor, compares it with a preset speed, and determines that it is a sudden acceleration if it is faster than the preset speed; A battery module including a battery pack equipped with several battery cells and a power relay that controls the supply of electric energy to the battery pack or from the battery pack to the outside; A driving motor that receives electric energy from the above battery module and transmits driving power to the vehicle wheels; and Including a contactor that blocks or connects the connection between the battery module and the driving motor, and an emergency switch that operates the contactor; and a sudden acceleration control means that, when a user or the sudden acceleration detection unit detects sudden acceleration, the user operates the emergency switch to off to cut off the electric energy from the contactor, thereby stopping the supply of electric energy provided to the driving motor; A junction box provided between the above power relay and the driving motor; and Including an inverter provided between the above junction box and the driving motor; The above contactor, A bipolar contact type is provided between the power relay and the junction box, including a first coil and a second coil that generate a magnetic force internally from electric energy provided from the outside, a contact terminal connected to the first coil and the second coil, and a constant power source that provides electric energy to the first coil and the second coil. An electric vehicle sudden acceleration control system in which a magnetic force is selectively generated in the first coil and the second coil according to the on / off state of the emergency switch, thereby causing the first connection line connected to the power relay and the second connection line connected to the junction box to be energized and disconnected through the contact terminal, respectively.

2. In paragraph 1, An electric vehicle sudden acceleration control system including a regenerative braking means, wherein, when the emergency switch is in the On state, the first coil and the second coil come into contact with the contact terminal to transmit electric energy through the driving motor, the inverter, and the junction box to the power relay, and the electric energy is supplied from the power relay to the battery module, thereby charging the battery module.

3. In paragraph 1, An electric vehicle sudden acceleration control system comprising: a rapid charger for rapidly charging a battery module when the emergency switch is in the On state, the first coil and the second coil come into contact with contact terminals; a rapid charging means for supplying electric energy to the power relay through the junction box and supplying it from the power relay to the battery module, thereby charging the battery module; 4. In paragraph 1, An electric vehicle sudden acceleration control system comprising: a slow charger which converts electric energy into direct current (DC) when the first coil and the second coil are in contact with contact terminals when the emergency switch is in the On state; a low-voltage direct current converter (LDC) which converts high voltage into a low voltage of 12 V and supplies electric power to a low-voltage battery or each electrical component of the vehicle; a slow charger relay (OBCRelay) connected to the slow charger between the contactor and the junction box; and a slow charging means which supplies electric energy to the power relay through the junction box and supplies it to the battery module from the power relay to charge the battery module.

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