Charging detection circuit, voltage controller, vehicle and charging control system

Abstract

The utility model provides a charging detection circuit, a voltage controller, a vehicle and a charging control system, and relates to the technical field of electronics, the charging detection circuit comprises a first resistor, and the first end of the first resistor is used for being connected to a first power supply; the first end of the voltage stabilizing unit is connected with the second end of the first resistor, and the second end of the voltage stabilizing unit is grounded; the first end of the voltage sampling unit is connected with the third end of the voltage stabilizing unit, and the second end of the voltage sampling unit is used for being connected to a main controller; the first detection point is led out from the position between the second end of the first resistor and the first end of the voltage stabilizing unit and used for being connected to a first detection pin of the charging gun; the second detection point is led out from the position between the second end of the voltage stabilizing unit and the ground and used for being connected to a second detection pin of the charging gun. According to the invention, the structure of the CC resistance value detection circuit is simplified.

Description

Technical Field

[0001] The utility model relates to the field of electronic technology, in particular to a charging detection circuit, a voltage controller, a vehicle and a charging control system. Background Art

[0002] New energy vehicles have charging and discharging capabilities. The battery management system effectively manages the charging and discharging process by precisely monitoring the CC resistor value. This resistance value is typically calculated indirectly by precisely measuring the voltage difference between the pull-up resistor and the ground point in the vehicle's power supply. The CC resistor value on the charging gun is an important indicator of the slow charging type of the charging gun and directly factors into the current limiting strategy during the charging process.

[0003] However, the current judgment circuit design is relatively complex and involves the coordinated work of multiple electronic components, resulting in increased system costs. Utility Model Content

[0004] In view of this, the present application provides a charging detection circuit, a voltage controller, a vehicle and a charging control system, aiming to overcome at least one of the above-mentioned defects.

[0005] A charging detection circuit provided in the present application is characterized in that it includes: a first resistor, wherein the first end of the first resistor is used to be connected to a first power supply; a voltage stabilizing unit, wherein the first end of the voltage stabilizing unit is connected to the second end of the first resistor, and the second end of the voltage stabilizing unit is grounded; a voltage sampling unit, wherein the first end of the voltage sampling unit is connected to the third end of the voltage stabilizing unit, and the second end of the voltage sampling unit is used to be connected to a main controller; a first detection point, wherein the first detection point is drawn out from between the second end of the first resistor and the first end of the voltage stabilizing unit for connecting to a first detection pin of a charging gun; and a second detection point, wherein the second detection point is drawn out from between the second end of the voltage stabilizing unit and the ground for connecting to a second detection pin of the charging gun.

[0006] Preferably, the voltage stabilizing unit includes: a diode, a cathode of the diode is connected to the second end of the first resistor; a second resistor, a first end of the second resistor is connected to the anode of the diode, and a second end of the second resistor is grounded.

[0007] Preferably, the voltage sampling unit includes: a third resistor, a first end of the third resistor is connected between the anode of the diode and the first end of the second resistor, and a second end of the third resistor is connected to the main controller; a fourth resistor, a first end of the fourth resistor is connected to the second power supply, and a second end of the fourth resistor is connected between the first end of the third resistor.

[0008] Preferably, the first detection pin includes a first CC pin of a charging gun, and the second detection pin includes a second CC pin of the charging gun.

[0009] Preferably, the charging gun includes: a CC resistor, including the first CC pin and a first pin, the first CC pin is connected to the first detection point; an interface switch, including the second CC pin and a second pin, the second pin is connected to the first pin, and the second CC pin is connected to the second detection point.

[0010] Preferably, the first power supply is used to provide a first output voltage, the second power supply is used to provide a second output voltage, and the first output voltage is greater than the second output voltage.

[0011] Preferably, the first resistor, the second resistor, the third resistor, the fourth resistor, and the diode are packaged into one device.

[0012] The present application also provides a voltage controller, which includes the above-mentioned charging detection circuit.

[0013] The present application also provides a vehicle, comprising: the voltage controller as described above; and a main controller, wherein the second end of the voltage sampling unit of the voltage controller is connected to the main controller.

[0014] The present application also provides a charging control system, which includes: a vehicle as described above, the vehicle including a first charging interface, the first charging interface including a first detection point and a second detection point; a charging pile; a charging gun, the charging gun including a first detection pin and a second detection pin, wherein the first detection pin is used to connect to the first detection point, and the second detection pin is used to connect to the second detection point.

[0015] The present application provides a charging detection circuit, a voltage controller, a vehicle, and a charging control system, relating to the field of electronic technology. The charging detection circuit includes a first resistor, wherein the first end of the first resistor is connected to a first power source; a voltage stabilizing unit, wherein the first end of the voltage stabilizing unit is connected to the second end of the first resistor, and the second end of the voltage stabilizing unit is grounded; a voltage sampling unit, wherein the first end of the voltage sampling unit is connected to the third end of the voltage stabilizing unit, and the second end of the voltage sampling unit is connected to a main controller; a first detection point, which is drawn between the second end of the first resistor and the first end of the voltage stabilizing unit for connection to a first detection pin of a charging gun; and a second detection point, which is drawn between the second end of the voltage stabilizing unit and ground for connection to a second detection pin of the charging gun. Through the present application, a simplified structure of a charging detection circuit for CC resistance is achieved.

[0016] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 A schematic diagram of the structure of a charging detection circuit provided in an embodiment of the present application is shown;

[0019] Figure 2 A schematic structural diagram of a charging control system provided in an embodiment of the present application is shown.

[0020] Reference numerals: 100 - voltage controller; 110 - main controller; 120 - voltage stabilizing unit; 130 - voltage sampling unit; 200 - charging gun end. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application for protection, but merely represents the selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of this application.

[0022] In the description of the embodiments of the present application, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings, or are the orientation or positional relationship in which the utility model product is usually placed when in use. They are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, they should not be understood as limiting the utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description and should not be understood as indicating or implying relative importance.

[0023] Furthermore, terms such as "horizontal" and "vertical" do not necessarily mean that a component must be absolutely horizontal or overhanging, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but rather that it can be slightly tilted.

[0024] In the description of the embodiments of the present application, it should also be noted that, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0025] like Figure 1 As shown, an embodiment of the present application provides a charging detection circuit, including: a first resistor R1, a voltage stabilizing unit 120, a voltage sampling unit 130, a first detection point K1, and a second detection point K2. The first resistor R1 serves as a pull-up resistor, with a first end connected to the first power supply U1. The first end of the voltage stabilizing unit 120 is connected to the second end of the first resistor R1, and the second end of the voltage stabilizing unit 120 is grounded. The first end of the voltage sampling unit 130 is connected to the second end of the voltage stabilizing unit 120, and the second end of the voltage sampling unit 130 is connected to the main controller 110 of the vehicle. The first detection point K1 is drawn from between the second end of the first resistor R1 and the first end of the voltage stabilizing unit 120 for connection to the first detection pin of the charging gun. The second detection point K2 is drawn from between the second end of the second resistor R2 and ground for connection to the second detection pin of the charging gun.

[0026] In this embodiment of the present application, the supply voltage of the first power supply U1 is 12V, and the first resistor R1 acts as a current limiter, thereby protecting other components in the circuit from excessive current. The voltage sampling unit 130 is responsible for monitoring the output voltage of the voltage stabilizing unit 120. The vehicle's main controller 110 receives the voltage from the voltage sampling unit 130. However, the sampled voltage is susceptible to fluctuations due to external factors. Therefore, the voltage stabilizing unit 120 is used to provide a stable voltage output that is not affected by input voltage fluctuations.

[0027] Furthermore, the voltage stabilizing unit 120 includes a diode L1 and a second resistor R2. The cathode of the diode L1 is connected to the second end of the first resistor R1, and the anode of the diode L1 is grounded. The first end of the second resistor R2 is connected to the anode of the diode L1, and the second end of the second resistor R2 is grounded.

[0028] Diode L1 acts as a voltage-dropping element. When forward biased, it allows a certain amount of current to flow through it, generating a relatively stable voltage drop across it. This voltage drop helps stabilize the voltage of subsequent circuits. At the same time, the voltage drop of diode L1 is significantly affected by ambient temperature. The second resistor R2 further stabilizes the output voltage and also limits the current through diode L1, preventing it from overheating.

[0029] Furthermore, the voltage sampling unit 130 includes a third resistor R3 and a fourth resistor R4. A voltage sampling point K3 is located at the connection point between the third resistor R3 and the fourth resistor R4. The main controller 110 reads the voltage at the voltage sampling point K3 through the voltage sampling unit. The third resistor R3 has a first end connected between the anode of the diode L1 and the first end of the second resistor R2, and a second end connected to the main control system. The fourth resistor R4 has a first end connected to the second power supply U2, and a second end connected between the anode of the diode L1 and the first end of the third resistor R3.

[0030] The second power supply U2 has a supply voltage of 5V and is used to provide the necessary bias voltage or operating voltage for the voltage sampling unit 130. The third resistor R3 is a voltage divider resistor. Together with the output terminal of the voltage stabilizing unit 120 and the fourth resistor R4, it forms a voltage divider circuit. This voltage divider circuit reduces the output voltage of the voltage stabilizing unit 120 to fit within the input range of the main controller 110. The fourth resistor R4 is also part of the voltage divider circuit. Together with the third resistor R3, the fourth resistor R4 ensures that the output voltage is within the appropriate range and can be accurately read by the main controller 110.

[0031] The present invention further provides a voltage controller 100 , which includes the charging detection circuit of any one of the above embodiments.

[0032] The present invention further provides a vehicle, which includes a main controller 110 and the voltage controller 100 according to any one of the above embodiments.

[0033] In the embodiment of the present application, the vehicle includes at least an electric vehicle and a hybrid vehicle.

[0034] The present utility model also provides a charging control system, which includes a charging pile, a charging gun and a vehicle according to any one of the above embodiments.

[0035] like Figure 2 As shown, Figure 2The schematic diagram of the charging control system provided by the embodiment of the present application is shown. It includes: a charging pile, a vehicle and a charging gun, wherein the charging gun input end is connected to the charging pile, and the charging gun end 200 is used to connect to the vehicle. The charging gun end 200 includes a CC resistor R c and interface switch S1.

[0036] Among them, CC resistance R c The first CC pin is used to connect to the first detection point K1, and the CC resistor R c The first pin of is used to connect to the first end of the interface switch S1, and the second CC pin of the interface switch S1 is connected to the second detection point K2. When the interface switch S1 is closed, the current provided by the first power supply flows through the CC resistor R c The main controller 110 uses the third resistor R3 to measure the voltage at the voltage sampling point K3. The corresponding relationship between the voltage drop of the diode L1 and the sampling voltage of the main controller 110 can be obtained through experimental measurement, and combined with the known resistance value of the fourth resistor R4, the CC resistance R c resistance value.

[0037] As an example, the CC resistance R can be calculated by the following formula c Resistance value:

[0038]

[0039] Arranged as:

[0040]

[0041] Among them, V1 is the output voltage of the first power supply U1, V2 is the output voltage of the second power supply U2, V3 is the voltage drop of the diode L1, V cc The voltage at the voltage sampling point K3 is collected for the main controller 110 .

[0042] Finally, it should be noted that the above-described embodiments are only specific implementation methods of the present application, which are used to illustrate the technical solutions of the present application, rather than to limit them. The scope of protection of the present application is not limited thereto. Although the present application has been described in detail with reference to the above-described embodiments, those skilled in the art should understand that any person skilled in the art can modify or easily conceive of changes to the technical solutions described in the above-described embodiments within the technical scope disclosed in the present application, or perform equivalent replacements for some of the technical features thereof. Such modifications, changes, or replacements do not deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application shall be based on the scope of protection of the claims.

Claims

1. A charging detection circuit, characterized in that: include: a first resistor, wherein a first end of the first resistor is connected to a first power source; a voltage stabilizing unit, wherein a first end of the voltage stabilizing unit is connected to the second end of the first resistor, and a second end of the voltage stabilizing unit is grounded; a voltage sampling unit, wherein a first end of the voltage sampling unit is connected to a third end of the voltage stabilizing unit, and a second end of the voltage sampling unit is used to be connected to a main controller; a first detection point, the first detection point being led out between the second end of the first resistor and the first end of the voltage stabilizing unit, and being configured to be connected to a first detection pin of a charging gun; The second detection point is led out from between the second end of the voltage stabilizing unit and the ground, so as to be connected to the second detection pin of the charging gun.

2. The charging detection circuit according to claim 1, characterized in that: The voltage stabilizing unit includes: a diode, wherein a cathode of the diode is connected to the second end of the first resistor; a second resistor, wherein a first end of the second resistor is connected to the anode of the diode, and a second end of the second resistor is grounded.

3. The charging detection circuit according to claim 2, characterized in that: The voltage sampling unit includes: a third resistor, wherein a first end of the third resistor is connected between the anode of the diode and the first end of the second resistor, and a second end of the third resistor is connected to the main controller; A fourth resistor, wherein a first end of the fourth resistor is connected to the second power supply, and a second end of the fourth resistor is connected to the first end of the third resistor.

4. The charging detection circuit according to claim 1, wherein: The first detection pin includes a first CC pin of the charging gun, and the second detection pin includes a second CC pin of the charging gun.

5. The charging detection circuit according to claim 4, characterized in that: The charging gun includes: A CC resistor, comprising the first CC pin and a first pin, wherein the first CC pin is connected to the first detection point; The interface switch includes the second CC pin and a second pin, wherein the second pin is connected to the first pin, and the second CC pin is connected to the second detection point.

6. The charging detection circuit according to claim 3, characterized in that: The first power supply is used to provide a first output voltage, and the second power supply is used to provide a second output voltage, and the first output voltage is greater than the second output voltage.

7. The charging detection circuit according to claim 3, characterized in that: The first resistor, the second resistor, the third resistor, the fourth resistor, and the diode are packaged into one device.

8. A voltage controller, characterized in that: The voltage controller includes the charge detection circuit according to any one of claims 1 to 7.

9. A vehicle, characterized in that: The vehicle comprises: The voltage controller according to claim 8; A main controller, wherein the second end of the voltage sampling unit of the voltage controller is connected to the main controller.

10. A charging control system, characterized in that: The charging control system includes: The vehicle of claim 9, the vehicle comprising a first charging port, the first charging port comprising a first detection point and a second detection point; Charging stations; A charging gun, comprising a first detection pin and a second detection pin, wherein the first detection pin is used to connect to the first detection point, and the second detection pin is used to connect to the second detection point.

Images