JP-7855591-B2 - Electric vehicle charging controller
Inventors
- シン，グァンソブ
Assignees
- エルジー イノテック カンパニー リミテッド
Dates
- Publication Date
- 20260508
- Application Date
- 20220104
- Priority Date
- 20210104
Claims (5)
- When the first port of the electric vehicle power supply device and the second port of the electric vehicle are connected, a signal generation unit generates a switching signal using a control signal . A switching unit that turns on a switch element connected to one end of the second port via the aforementioned switching signal . A voltage distribution unit that distributes the voltage supplied by the first power supply of the electric vehicle by a plurality of resistors electrically connected to the second port , An electric vehicle charging controller comprising: a sensing unit that senses the voltage distributed by the plurality of resistors and generates a sensing voltage ; and a determination unit that determines the connection state with the electric vehicle power supply device and the ground short state of the power supply device's power based on the voltage value of the sensing voltage, The aforementioned determination unit determines, before the electric vehicle enters the battery charging process, that the power supply of the supply device has been short-circuited to ground when the detected voltage value is 0. Before the electric vehicle enters the battery charging process, the determination unit determines that the first port and the second port are electrically connected when the voltage value of the sensing voltage is smaller than the first reference value, and starts the battery charging process. The determination unit determines that the electric vehicle's battery has short-circuited when the voltage value of the sensed voltage corresponds to a first reference value while the electric vehicle's battery is being charged, and interrupts the battery charging process. Electric vehicle charging controller.
- The sensing unit is, A first resistor having a first end connected to the collector terminal of a switch and a second end connected to a first power supply, The first end connected to the collector terminal of the switch and the second resistor connected to the signal output terminal, The electric vehicle charging controller according to claim 1, comprising a third resistor having a first end connected to the second end of the second resistor and a second end connected to a first ground terminal.
- The unit that makes the determination said, The electric vehicle charging controller according to claim 1, wherein if the voltage value of the sensing voltage corresponds to a first reference value, it is determined that the first port and the second port are not electrically connected.
- The switching unit is An electric vehicle charging controller according to claim 1, comprising an NPN type bipolar junction transistor.
- The switching unit also includes a diode having a cathode terminal electrically connected to the base terminal of the switch. The electric vehicle charging controller according to claim 1, wherein the emitter terminal of the switching unit is electrically connected to the second ground terminal of the supply device.
Description
The example relates to an electric vehicle charging controller. Environmentally friendly vehicles such as electric vehicles (EVs) or plug-in hybrid electric vehicles (PHEVs) utilize electric vehicle supply equipment (EVSEs) installed at charging stations for battery charging. For this purpose, the Electric Vehicle Charging Controller (EVCC) is installed inside the EV, communicates with the EV and EVSE, and controls the charging of the electric vehicle. For example, if the EVCC receives a signal from the electric vehicle to begin charging, it can control the system to start charging. Similarly, if it receives a signal from the electric vehicle to end charging, it can control the system to end charging. Electric vehicle charging methods can be classified into fast charging and slow charging based on charging time. In fast charging, the battery is charged by direct current supplied by the charger, while in slow charging, the battery is charged by alternating current supplied to the charger. Therefore, chargers used for fast charging are called fast chargers or DC chargers, and chargers used for slow charging are called slow chargers or AC chargers. Because electric vehicle charging systems use high-voltage electricity for charging, they are susceptible to safety issues such as electric shock and system failures due to reverse current. Therefore, to prevent various problems that may occur during charging, electric vehicle charging systems control the charging process through various sequences and offer diverse structures to enhance system safety. However, current electric vehicle charging systems are unable to detect or prevent all the various problems that can occur during the battery charging process, and solutions are needed to address this. These are drawings illustrating an electric vehicle charging system according to an embodiment of the present invention. This is a drawing showing the configuration of an electric vehicle charging system according to an embodiment of the present invention. This is a configuration diagram of an electric vehicle charging controller according to an embodiment of the present invention. This is a diagram showing the circuit configuration of an electric vehicle charging controller according to an embodiment of the present invention. This diagram shows the current flow when the switching unit according to an embodiment of the present invention is in the turn-off state. This diagram shows the current flow when the switching unit according to an embodiment of the present invention is in the turn-on state. This is a flowchart illustrating the port state determination process using an electric vehicle charging controller according to an embodiment of the present invention. This is a configuration diagram of an electric vehicle charging controller according to one embodiment of the present invention. This is a flowchart illustrating a method for determining the connection status of an electric vehicle charging controller according to one embodiment of the present invention. Preferred embodiments of the present invention will be described in detail below with reference to the attached drawings. However, the technical concept of the present invention is not limited to the embodiments described, but can be embodied in a variety of different forms, and within the scope of the technical concept of the present invention, one or more of its components can be selectively combined or substituted between embodiments. Furthermore, unless explicitly defined, terms used in the embodiments of this invention (including technical and scientific terms) may be interpreted in a way that is generally understood by those skilled in the art to which this invention pertains. Terms commonly used, such as those defined in dictionaries, may be interpreted considering their meaning within the context of the relevant art. Furthermore, the terminology used in the embodiments of this invention is for illustrative purposes only and is not intended to limit the invention. In this specification, singular types may also include plural types unless otherwise specified in the text. Where it states "A and/or at least one of B and C," it may include one or more of all possible combinations of A, B, and C. Furthermore, when describing the components of the embodiments of the present invention, terms such as "first," "second," "A," "B," (a), (b), etc., may be used. Such terminology is merely used to distinguish a component from other components, and does not limit the essence, order, or sequence of the component in question. Furthermore, when it is stated that a component is “connected,” “joined,” or “connected” to another component, this may include not only cases where the component is directly connected, joined, or connected to the other component, but also cases where it is “connected,” “joined,” or “connected” by yet another component between that component and the other component. Furthermore, when a component is de