Electric vehicle charging and discharging double-gun detection device

Abstract

The utility model discloses an electric automobile charging and discharging double-gun detection device, and belongs to the technical field of electric automobile charging. Comprising a vehicle end detection part, the vehicle end detection part comprises a voltage dividing unit, the voltage dividing unit comprises a first resistor, and the first end of the first resistor is connected with an independent power supply unit; the first end of the second resistor is connected with the second end of the first resistor, and the second end of the second resistor is grounded; and the gun end matching part is connected in parallel with the resistor interface side of the vehicle end detection part. The beneficial effects of the technical scheme are that the charging detection and the discharging detection of the gun end matching part share one vehicle end detection circuit, the states of the charging gun and the discharging gun can be accurately detected, the hardware cost is reduced, and the safety of vehicle charging and discharging is improved.

Description

Technical Field

[0001] This utility model relates to the field of electric vehicle charging technology, and in particular to a dual-gun charging and discharging detection device. Background Technology

[0002] With the widespread application of new energy vehicles, their external discharge function is also becoming increasingly common. In practical use, new energy vehicles rely on different charging and discharging guns to achieve charging and discharging operations, with only one connection port on the vehicle side. The battery management system plays a crucial role, activating the corresponding charging or discharging function based on the detected charging and discharging gun insertion status to ensure the normal operation of the vehicle's energy management.

[0003] Currently, the mainstream method for battery management systems to detect charging and discharging guns is to add a discharge detection circuit to the existing charging gun detection circuit. While this method can accurately determine whether a charging or discharging gun is inserted, it inevitably increases hardware costs, raising vehicle production costs and making the vehicle's internal circuitry more complex, thus increasing the potential risk of malfunctions and the difficulty of repair. Utility Model Content

[0004] The purpose of this utility model is to provide a dual-gun detection device for charging and discharging electric vehicles, thereby solving the above-mentioned technical problems.

[0005] A dual-gun detection device for charging and discharging electric vehicles, comprising:

[0006] The vehicle-end detection unit includes a voltage divider unit, which includes...

[0007] The first resistor, with its first end connected to an independent power supply unit;

[0008] The second resistor has a first end connected to the second end of the first resistor, and the second end of the second resistor is grounded.

[0009] The gun-end matching part is connected in parallel to the resistor interface side of the vehicle-end detection part.

[0010] Preferably, the gun-end matching part includes a discharge gun matching unit, and the discharge gun matching unit includes,

[0011] A third resistor, the two ends of which are connected to the resistor interface side;

[0012] The fourth resistor has a first switch connected in series at its first end to the first end of the third resistor, and its second end is connected to the second end of the third resistor. The second end of the fourth resistor is also grounded.

[0013] Preferably, the gun-end matching part further includes a charging gun matching unit, the charging gun matching unit comprising,

[0014] The fifth resistor, the second end of which is connected to the resistor interface side;

[0015] The second switch is connected in parallel with the fifth resistor;

[0016] The sixth resistor has its first end connected to the resistor interface side and its second end connected to the first end of the fifth resistor.

[0017] Preferably, the independent power supply unit is a power supply, and the negative terminal of the power supply is grounded.

[0018] Preferably, the first resistor is 0.297kΩ to 0.363kΩ, and the second resistor is 1.7kΩ to 3.7kΩ.

[0019] Preferably, a voltage acquisition node is provided between the first resistor and the second resistor, and when the voltage at the voltage acquisition node is 4.18V to 4.78V, the gun-end matching part is in an uninserted state.

[0020] Preferably, when the voltage at the voltage acquisition node is 3.2V to 4.1V, the gun end matching part is in the discharge gun insertion state;

[0021] When the voltage at the voltage acquisition node is 0.2V to 1.1V, the gun end matching part is in the discharge gun locked state.

[0022] Preferably, when the voltage at the voltage acquisition node is 2.38V to 3.16V, the gun-end matching part is in the charging gun insertion state;

[0023] When the voltage at the voltage acquisition node is between 1.23V and 1.82V, the gun-end matching part is in the charging gun locked state.

[0024] Preferably, when the voltage at the voltage acquisition node is -0.1V to 0.1V, the detection interface of the gun end matching part is in a fault state.

[0025] Preferably, the gun-end matching part further includes a power supply control part, which is connected to the charging gun matching unit.

[0026] The beneficial effects of this utility model are: the charging detection and discharging detection of the gun-end matching part share a vehicle-end detection circuit, which can accurately detect the status of the charging gun and the discharging gun, reduce hardware costs, and improve the safety of vehicle charging and discharging. Attached Figure Description

[0027] Figure 1 This is the discharge gun detection circuit diagram of this utility model;

[0028] Figure 2 This is the circuit diagram for the charging gun detection of this utility model. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0031] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but this is not intended to limit the present invention.

[0032] A dual-gun detection device for charging and discharging electric vehicles, such as Figure 1 , Figure 2 As shown, including,

[0033] Vehicle-side detection unit 1, which includes a voltage divider unit 12, comprising,

[0034] The first resistor R1 is connected to the independent power supply unit 11.

[0035] The second resistor R2 has its first end connected to the second end of the first resistor R1, and its second end grounded.

[0036] The gun-end matching part 2 is connected in parallel to the resistor interface side A of the vehicle-end detection part 1. Specifically, this utility model provides a dual-gun detection device for charging and discharging electric vehicles, which uses the same detection circuit (vehicle-end detection part 1) to detect the charging gun and discharging gun of the electric vehicle. This can accurately detect the status of the charging gun and discharging gun while reducing hardware costs and improving the safety of vehicle charging and discharging.

[0037] In a preferred embodiment, the gun-end matching portion 2 includes a discharge gun matching unit 21, which includes,

[0038] The third resistor R3 is connected to resistor interface A at both ends;

[0039] The fourth resistor R4 has its first end connected in series with a first switch S1, which is connected to the first end of the third resistor R3. The second end of the fourth resistor R4 is connected to the second end of the third resistor R3, and the second end of the fourth resistor R4 is also grounded.

[0040] Specifically, by connecting a 1.5kΩ third resistor R3 in parallel with a 0.05kΩ fourth resistor R4 that can be independently connected and controlled by a first switch S1, the discharge gun lock triggers the first switch S1 to close, and the discharge gun status is confirmed by connecting this circuit to the vehicle end detection unit 1.

[0041] When the state of the first switch S1 changes, the resistance value of the entire discharge gun matching unit 21 connected to the circuit will change, which in turn affects the voltage of the voltage acquisition node V1.

[0042] In a preferred embodiment, the gun-end matching portion 2 further includes a charging gun matching unit 22, which includes,

[0043] The fifth resistor R5, the second end of the fifth resistor R5 is connected to resistor interface A;

[0044] The second switch S2 is connected in parallel with the fifth resistor R5;

[0045] The sixth resistor R6 has its first end connected to resistor interface A, and its second end connected to the first end of the fifth resistor R5.

[0046] Specifically, by connecting a 0.15kΩ sixth resistor R6 in series with a 0.33kΩ fifth resistor R5 connected in parallel through a second switch S2, where the charging gun lock triggers the second switch S2 to close, by incorporating this circuit into the vehicle-end detection unit 1, the resistance characteristics of the circuit change when the charging gun is connected, thereby affecting the voltage of the voltage acquisition node V1, so as to confirm the status of the charging gun.

[0047] In a preferred embodiment, the independent power supply unit 11 is a power supply, and the negative terminal of the power supply is grounded.

[0048] Specifically, the independent power supply unit 11 is designed with a 5V independent voltage to prevent external interference. Regardless of the charging / discharging gun's state, the circuit can operate under a stable voltage environment, avoiding detection errors caused by power fluctuations and improving detection accuracy.

[0049] In a preferred embodiment, the first resistor R1 is 0.297kΩ to 0.363kΩ, specifically 0.33kΩ, and the second resistor R2 is 1.7kΩ to 3.7kΩ, specifically 2.7kΩ.

[0050] Specifically, the vehicle-end detection unit 1 connects the first resistor R1 and the second resistor R2 in series through the independent power supply unit 11, and collects the voltage at the point in real time through the voltage acquisition node V1. The vehicle-end detection device and the gun-end matching device are designed separately, which increases the scalability of the device and allows for the expansion design of the detection state according to the resistance value of the matching resistor being detected.

[0051] Based on the voltage divider principle, the specific resistance combination of these two resistors allows the voltage acquisition node V1 to generate significantly different voltage values ​​when the charging gun is not inserted, or when the charging gun is in different states, which facilitates accurate subsequent determination of the charging and discharging gun status.

[0052] In a preferred embodiment, the correspondence between the charging / discharging gun state and V1 is shown in the table below. By designing different resistance values ​​of the resistors connected to the detection circuit when the charging / discharging gun is inserted in different states, the insertion state is distinguished based on the resistance value detected by V1.

[0053] Gun status V1 voltage value Uninserted gun 4.18V~4.78V Discharge gun insertion 3.2V~4.1V Discharge gun locked 0.2V~1.1V Charging gun inserted 2.38V~3.16V Charging gun locked 1.23V~1.82V Detection interface fault -0.1V to 0.1V

[0054] A voltage acquisition node V1 is provided between the first resistor R1 and the second resistor R2. When the voltage at the voltage acquisition node V1 is 4.18V to 4.78V, the gun end matching part 2 is in the uninserted state.

[0055] When the voltage at voltage acquisition node V1 is 3.2V to 4.1V, the gun end matching part 2 is in the discharge gun insertion state;

[0056] When the voltage at voltage acquisition node V1 is 0.2V to 1.1V, the gun end matching part 2 is in the discharge gun locked state;

[0057] When the voltage at voltage acquisition node V1 is 2.38V to 3.16V, the gun-end matching part 2 is in the charging gun insertion state;

[0058] When the voltage at voltage acquisition node V1 is 1.23V to 1.82V, the gun-end matching part 2 is in the charging gun locked state;

[0059] When the voltage at voltage acquisition node V1 is -0.1V to 0.1V, the detection interface of gun end matching part 2 is in a fault state. The insertion state and locking state of the gun are designed to span voltage ranges to prevent false detection of the locking state.

[0060] In a preferred embodiment, the gun-end matching unit 2 further includes a power supply control unit 3, which is connected to the charging gun matching unit 22.

[0061] Specifically, during the charging process, the voltage, current and other parameters of the power supply can be adjusted based on the information fed back by the charging gun matching unit 22, such as whether the charging gun is inserted or locked, so as to ensure the safety of the entire charging system.

[0062] This invention integrates the detection circuits of the charging gun and the discharging gun through a combination design of the detection circuit at the vehicle end and the matching resistor at the gun end, reducing hardware costs and expanding the detection range of the detection circuit, thus achieving the goal of integrated detection of the discharging gun and the charging gun.

[0063] The above description is only a preferred embodiment of the present utility model and does not limit the implementation method and protection scope of the present utility model. Those skilled in the art should realize that all solutions obtained by equivalent substitutions and obvious changes made based on the description and illustrations of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A dual-gun detection device for charging and discharging electric vehicles, characterized in that, include, Vehicle-end detection unit (1), the vehicle-end detection unit (1) includes a voltage divider unit (12), the voltage divider unit (12) includes, The first resistor (R1) is connected to the independent power supply unit (11) at its first end. The second resistor (R2) has its first end connected to the second end of the first resistor (R1), and its second end grounded. The gun-end matching part (2) is connected in parallel to the resistor interface side (A) of the vehicle-end detection part (1).

2. The electric vehicle charging and discharging dual-gun detection device according to claim 1, characterized in that, The gun-end matching part (2) includes a discharge gun matching unit (21), which includes, The third resistor (R3) is connected at both ends to the resistor interface side (A); A fourth resistor (R4) is connected in series with a first switch (S1) to the first terminal of the third resistor (R3). The second terminal of the fourth resistor (R4) is connected to the second terminal of the third resistor (R3). The second terminal of the fourth resistor (R4) is also grounded.

3. The electric vehicle charging and discharging dual-gun detection device according to claim 2, characterized in that, The gun-end matching part (2) further includes a charging gun matching unit (22), which includes, The fifth resistor (R5) has its second end connected to the resistor interface side (A); The second switch (S2) is connected in parallel with the fifth resistor (R5); The sixth resistor (R6) has its first end connected to the resistor interface side (A) and its second end connected to the first end of the fifth resistor (R5).

4. The electric vehicle charging and discharging dual-gun detection device according to claim 1, characterized in that, The independent power supply unit (11) is a power supply, and the negative terminal of the power supply is grounded.

5. The electric vehicle charging and discharging dual-gun detection device according to claim 1, characterized in that, The first resistor (R1) has a resistance of 0.297kΩ to 0.363kΩ, and the second resistor (R2) has a resistance of 1.7kΩ to 3.7kΩ.

6. The electric vehicle charging and discharging dual-gun detection device according to claim 1, characterized in that, A voltage acquisition node (V1) is provided between the first resistor (R1) and the second resistor (R2). When the voltage at the voltage acquisition node (V1) is 4.18V to 4.78V, the gun end matching part (2) is in an uninserted state.

7. The electric vehicle charging and discharging dual-gun detection device according to claim 6, characterized in that, When the voltage at the voltage acquisition node (V1) is 3.2V to 4.1V, the gun end matching part (2) is in the discharge gun insertion state; When the voltage at the voltage acquisition node (V1) is 0.2V to 1.1V, the gun end matching part (2) is in the discharge gun locked state.

8. The electric vehicle charging and discharging dual-gun detection device according to claim 6, characterized in that, When the voltage at the voltage acquisition node (V1) is 2.38V to 3.16V, the gun end matching part (2) is in the charging gun insertion state; When the voltage at the voltage acquisition node (V1) is 1.23V to 1.82V, the gun end matching part (2) is in the charging gun locked state.

9. The electric vehicle charging and discharging dual-gun detection device according to claim 6, characterized in that, When the voltage at the voltage acquisition node (V1) is -0.1V to 0.1V, the detection interface of the gun end matching part (2) is in a fault state.

10. The electric vehicle charging and discharging dual-gun detection device according to claim 3, characterized in that, The gun-end matching part (2) also includes a power supply control part (3), which is connected to the charging gun matching unit (22).

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