A charging adapter box for electric buses with two-guns and one-choice

Abstract

The present invention belongs to the technical field of electric bus charging, specifically a dual-gun two-choice charging adapter box for electric buses, including a two-choice charging high-voltage box, wherein the interior of the two-choice charging high-voltage box is provided with an interlocking control, a sleep wake-up, a charging signal control part and a charging DC high-voltage control part, one end of the interlocking control is electrically connected to a +24V power supply, and the other end of the interlocking control is electrically connected to a GND ground wire, the interlocking control is connected to the sleep wake-up, and the interlocking control is used for circuit switch control, the interlocking control and one end of the sleep wake-up are connected to a charging signal control part, and the charging signal control part is used to control the charging signal. The present invention can solve the dual-gun two-choice charging problem without changing the structure of the existing high-voltage distribution box, thereby greatly reducing development costs and improving vehicle safety.

Description

Technical Field

[0001] The invention relates to the technical field of electric bus charging, and in particular to a double-gun two-choice charging adapter box for electric buses. Background Art

[0002] An electric bus is a bus that is powered by an on-board power supply and is equipped with a suitable on-board battery or cable power supply device to provide electrical energy for driving. Electric buses have good power performance, a continuous driving mileage of 500 kilometers, a long battery life and low cost, and are well-matched with the entire vehicle. Electric buses are generally only equipped with one charging port and one charging gun. For convenient charging, the vehicle needs to install two charging ports at different locations on the vehicle, namely charging ports A and B. When there is one gun, choose charging port A or charging port B to charge. When two guns are plugged in at the same time, only the first plug-in is recognized for charging, and the charging current does not change. In order to achieve the charging mode described above, it is necessary to change the existing high-voltage distribution box structure, which has high development costs.

[0003] To this end, we propose a dual-gun two-choice charging adapter box for electric buses. Summary of the invention

[0004] In view of the above-mentioned and / or existing problems in the existing electric bus dual-gun two-choice charging adapter box, the present invention is proposed.

[0005] Therefore, the purpose of the present invention is to provide an electric bus dual-gun two-choice charging adapter box that can solve the above-mentioned existing problems.

[0006] To solve the above technical problems, according to one aspect of the present invention, the present invention provides the following technical solutions:

[0007] An electric bus double-gun two-choice charging adapter box, which includes a two-choice charging high-voltage box, wherein the two-choice charging high-voltage box is internally provided with an interlock control, a sleep wake-up, a charging signal control part and a charging DC high-voltage control part, one end of the interlock control is electrically connected to a +24V power supply, and the other end of the interlock control is electrically connected to a GND ground wire, the interlock control is connected to the sleep wake-up, and the interlock control is used for circuit switch control, the interlock control and one end of the sleep wake-up are connected to the charging signal control part, and the charging signal control part is used to control the charging signal, and one end of the charging signal control part is connected to the charging The low-voltage signal is connected to the vehicle's high-voltage distribution box, and the vehicle's high-voltage distribution box is connected to the charging DC high-voltage control part through the charging DC+ voltage line / charging DC- voltage line, and the charging DC high-voltage control part is used to control the charging high voltage, one end of the charging signal control part is connected to gun No. 1 through the charging low-voltage signal of gun No. 1, and one end of the charging signal control part is connected to gun No. 2 through the charging low-voltage signal of gun No. 2. Gun No. 1 is connected to the charging DC high-voltage control part through the left charging DC+ and the left charging DC-, and gun No. 2 is connected to the charging DC high-voltage control part through the right charging DC+ and the right charging DC-.

[0008] As a preferred solution of the electric bus dual-gun two-choice charging adapter box described in the present invention, wherein: the interlock control includes the normally closed end of the K1 relay, the K1 relay, the normally closed end of the K2 relay, the K2 relay, the right charging port hatch proximity switch, the left charging port hatch proximity switch, the normally open end of the K1 relay and the normally open end of the K2 relay, the normally closed end of the K1 relay, the K2 relay, the right charging port hatch proximity switch and the K1 relay, the normally closed end of the K2 relay, the left charging port hatch proximity switch are connected in parallel to form a parallel circuit.

[0009] As a preferred solution of the electric bus dual-gun two-choice charging adapter box described in the present invention, wherein: the normally closed end of the K1 relay, the K2 relay and the right charging port hatch proximity switch are connected in series, and the K1 relay, the normally closed end of the K2 relay and the left charging port hatch proximity switch are connected in series.

[0010] As a preferred solution of the electric bus dual-gun two-choice charging adapter box described in the present invention, one end of the parallel circuit is connected to the +24V power supply, the other end of the parallel circuit is connected to the GND ground wire, and one end of the parallel circuit is connected to the IN- end in sleep and wake-up.

[0011] As a preferred solution of the electric bus dual-gun two-choice charging adapter box described in the present invention, wherein: one end of the parallel circuit is connected to the normally open end of the K1 relay and the normally open end of the K2 relay, the normally open end of the K1 relay and the normally open end of the K2 relay are connected in parallel, one end of the normally open end of the K1 relay and the normally open end of the K2 relay are connected to the IN+ end in the sleep and wake-up state, and the other end of the normally open end of the K1 relay and the normally open end of the K2 relay are connected to the EN end in the sleep and wake-up state.

[0012] As an optimal solution of the electric bus dual-gun two-choice charging adapter box described in the present invention, the charging low-voltage signal includes LCK+electronic lock signal, LCK-electronic lock signal, FB+electronic lock feedback signal, FB-electronic lock feedback signal, PT1+temperature sensor signal, PT1-temperature sensor signal, PT2+temperature sensor signal, PT2-temperature sensor signal, PP charging connection signal, and CP charging connection signal.

[0013] As a preferred solution of the electric bus dual-gun two-choice charging adapter box described in the present invention, wherein: the charging signal control part is composed of K11 relay, K12 relay, K13 relay, K14 relay, and K15 relay, and the normally closed ends on the K11 relay, the K12 relay, the K13 relay, the K14 relay, and the K15 relay are connected to the BMS of the two-choice charging high-voltage box 100, and the K11 relay, the K12 relay, the K13 relay, the K14 relay, and the K15 relay are connected to the charging low-voltage signal.

[0014] As a preferred solution of the electric bus double-gun two-choice charging adapter box described in the present invention, wherein: the charging DC high-voltage control part is composed of a first KM1 high-voltage contactor, a first KM2 high-voltage contactor, a first KM3 high-voltage contactor, a first KM4 high-voltage contactor, a controller, a second KM1 high-voltage contactor, a second KM2 high-voltage contactor, a second KM3 high-voltage contactor, and a second KM4 high-voltage contactor, one end of the first KM1 high-voltage contactor and the first KM2 high-voltage contactor are connected in parallel and connected to the charging DC+ high-voltage line, and one end of the first KM3 high-voltage contactor and the first KM4 high-voltage contactor are connected in parallel and connected to the charging DC- high-voltage line;

[0015] One end of the first KM1 high-voltage contactor is connected to the left charging DC+, one end of the first KM2 high-voltage contactor is connected to the right charging DC+, one end of the first KM3 high-voltage contactor is connected to the left charging DC-, and one end of the first KM4 high-voltage contactor is connected to the right charging DC-;

[0016] The controller is provided with a D1 diode, a D2 diode, a D3 diode, and a D4 diode respectively, and one end of the second KM1 high-voltage contactor, the second KM2 high-voltage contactor, the second KM3 high-voltage contactor, and the second KM4 high-voltage contactor are connected in parallel and connected to the GND ground wire;

[0017] The D1 diode is connected to the second KM1 high-voltage contactor, the D2 diode is connected to the second KM2 high-voltage contactor, the D3 diode is connected to the second KM3 high-voltage contactor, and the D4 diode is connected to the second KM4 high-voltage contactor.

[0018] Compared with existing technologies:

[0019] The present invention can solve the problem of charging with two guns without changing the structure of the existing high-voltage distribution box, greatly reduce development costs, and improve vehicle safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is an overall schematic diagram of the charging scheme of the present invention;

[0021] Figure 2 This is a schematic diagram of the structure of the dual-gun charging interlock control and sleep wake-up part of the present invention;

[0022] Figure 3 This is a schematic diagram of the structure of the charging signal control part of the present invention;

[0023] Figure 4 This is a schematic diagram of the structure of the charging DC high voltage control part of the present invention.

[0024] In the figure: two-choice charging high-voltage box 100, interlock control 110, K1 relay normally closed end 111, K1 relay 112, K2 relay normally closed end 113, K2 relay 114, right charging port hatch proximity switch 115, left charging port hatch proximity switch 116, K1 relay normally open end 117, K2 relay normally open end 118, sleep wake-up 120, charging signal control part 130, charging DC high-voltage control part 140, left charging DC+141, right charging DC+142, left charging DC-143, right charging DC-144, vehicle high-voltage distribution box 200. DETAILED DESCRIPTION

[0025] In order to make the objectives, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0026] The present invention provides a dual-gun two-choice charging adapter box for electric buses. Figure 1-Figure 4, including a two-choice charging high-voltage box 100, the two-choice charging high-voltage box 100 is provided with an interlock control 110, a sleep wake-up 120, a charging signal control part 130 and a charging DC high-voltage control part 140, one end of the interlock control 110 is electrically connected to a +24V power supply, and the other end of the interlock control 110 is electrically connected to a GND ground wire, the interlock control 110 is connected to the sleep wake-up 120, and the interlock control 110 is used for circuit switch control, one end of the interlock control 110 and the sleep wake-up 120 is connected to the charging signal control part 130, and the charging signal control part 130 is used to control the charging signal, and one end of the charging signal control part 130 is connected to the charging low-voltage signal The vehicle high-voltage distribution box 200 is connected to the vehicle high-voltage distribution box 200, which is connected to the charging DC high-voltage control part 140 through the charging DC+ voltage line / charging DC- voltage line, and the charging DC high-voltage control part 140 is used to control the charging high voltage. One end of the charging signal control part 130 is connected to gun No. 1 through the charging low-voltage signal of gun No. 1, and one end of the charging signal control part 130 is connected to gun No. 2 through the charging low-voltage signal of gun No. 2. Gun No. 1 is connected to the charging DC high-voltage control part 140 through the left charging DC+141 and the left charging DC-143, and gun No. 2 is connected to the charging DC high-voltage control part 140 through the right charging DC+142 and the right charging DC-144.

[0027] The interlock control 110 includes a K1 relay normally closed end 111, a K1 relay 112, a K2 relay normally closed end 113, a K2 relay 114, a right charging port hatch proximity switch 115, a left charging port hatch proximity switch 116, a K1 relay normally open end 117, and a K2 relay normally open end 118. The K1 relay normally closed end 111, the K2 relay 114, and the right charging port hatch proximity switch 115 are connected in parallel with the K1 relay 112, the K2 relay normally closed end 113, and the left charging port hatch proximity switch 116 to form a parallel circuit. The K1 relay normally closed end 111, the K2 relay 114, and the right charging port hatch proximity switch 115 are connected in series. The K1 relay 112 , the normally closed end 113 of the K2 relay and the left charging port hatch proximity switch 116 are connected in series, one end of the parallel circuit is connected to the +24V power supply, the other end of the parallel circuit is connected to the GND ground wire, one end of the parallel circuit is connected to the IN- end in the sleep wake-up 120, one end of the parallel circuit is connected to the K1 relay normally open end 117 and the K2 relay normally open end 118, the K1 relay normally open end 117 and the K2 relay normally open end 118 are connected in parallel, one end of the K1 relay normally open end 117 and the K2 relay normally open end 118 are connected to the IN+ end in the sleep wake-up 120, and the other end of the K1 relay normally open end 117 and the K2 relay normally open end 118 are connected to the EN end in the sleep wake-up 120.

[0028] The charging low voltage signal includes LCK+electronic lock signal, LCK-electronic lock signal, FB+electronic lock feedback signal, FB-electronic lock feedback signal, PT1+temperature sensor signal, PT1-temperature sensor signal, PT2+temperature sensor signal, PT2-temperature sensor signal, PP charging connection signal, and CP charging connection signal.

[0029] The charging signal control part 130 is composed of K11 relay, K12 relay, K13 relay, K14 relay and K15 relay. The normally closed ends of K11 relay, K12 relay, K13 relay, K14 relay and K15 relay are connected to the BMS of the two-choice charging high-voltage box 100, and K11 relay, K12 relay, K13 relay, K14 relay and K15 relay are connected to the charging low-voltage signal.

[0030] The charging DC high voltage control part 140 is composed of a first KM1 high voltage contactor, a first KM2 high voltage contactor, a first KM3 high voltage contactor, a first KM4 high voltage contactor, a controller, a second KM1 high voltage contactor, a second KM2 high voltage contactor, a second KM3 high voltage contactor, and a second KM4 high voltage contactor. One end of the first KM1 high voltage contactor and the first KM2 high voltage contactor are connected in parallel and connected to the charging DC+ high voltage line. One end of the first KM3 high voltage contactor and the first KM4 high voltage contactor are connected in parallel and connected to the charging DC- high voltage line. One end of the first KM1 high voltage contactor is connected to the left charging DC+141, and one end of the first KM2 high voltage contactor is connected to the left charging DC+141. One end is connected to the right charging DC+142, one end of the first KM3 high-voltage contactor is connected to the left charging DC-143, one end of the first KM4 high-voltage contactor is connected to the right charging DC-144, and the controller is respectively provided with a D1 diode, a D2 diode, a D3 diode, and a D4 diode. One end of the second KM1 high-voltage contactor, the second KM2 high-voltage contactor, the second KM3 high-voltage contactor, and the second KM4 high-voltage contactor are connected in parallel and connected to the GND ground wire. The D1 diode is connected to the second KM1 high-voltage contactor, the D2 diode is connected to the second KM2 high-voltage contactor, the D3 diode is connected to the second KM3 high-voltage contactor, and the D4 diode is connected to the second KM4 high-voltage contactor.

[0031] Working principle: On the existing electric vehicle, install a two-choice charging high-voltage box 100, connect the No. 1 gun charging low-voltage signal line / No. 2 gun charging low-voltage signal line, charging DC+ high-voltage line / charging DC- high-voltage line, right charging port hatch proximity switch 115 / left charging port hatch proximity switch 116 on the left and right sides of the vehicle to the two-choice charging high-voltage box 100 respectively, and the two-choice charging high-voltage box 100 outputs a charging low-voltage signal, charging DC+ high-voltage line / charging DC- high-voltage line to the vehicle high-voltage distribution box 200;

[0032] When the left charging hatch is opened, the left charging port hatch proximity switch 116 is closed, the K1 relay 112 is energized, the K1 relay normally closed end 111 is disconnected, the K1 relay normally open end 117 is closed, the sleep wake-up is activated, and the two-choice charging high-voltage box 100 controller is awakened and starts working. The controller receives the switch signal of the left charging port hatch proximity switch 116 and determines that the left plug is charging;

[0033] Since the normally closed terminal 111 of the K1 relay is disconnected, when the right charging hatch is opened, the circuit of the right charging port hatch proximity switch 115 is disconnected. In this way, even if the left and right charging ports are plugged in at the same time, the system will only judge the switch signal of the first opening of the hatch;

[0034] When the system determines that the left plug is charging, the charging low-voltage signal line of the No. 1 plug is directly output to the BMS of the two-choice charging high-voltage box 100 through the normally closed terminals of the K11 relay, K12 relay, K13 relay, K14 relay, and K15 relay. At the same time, the KM1 high-voltage contactor and the KM3 high-voltage contactor are closed, and the left charging DC+ and left charging DC- are output to the vehicle high-voltage distribution box 200;

[0035] When the system determines that the right side plug is charging, the K11 relay, K12 relay, K13 relay, K14 relay, and K15 relay are closed, and the low-voltage charging signal of gun No. 2 is output to the BMS of the two-choice charging high-voltage box 100. At the same time, the KM2 high-voltage contactor and KM4 high-voltage contactor are closed, and the right side charging DC+ and the right side charging DC- are output to the vehicle high-voltage distribution box 200.

[0036] Although the present invention has been described above with reference to the embodiments, various modifications may be made thereto and parts thereof may be replaced by equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the various features in the embodiments disclosed in the present invention may be used in combination with each other in any manner, and the fact that these combinations are not exhaustively described in this specification is only for the sake of omitting space and saving resources. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. An electric bus dual-gun two-choice charging adapter box, comprising a two-choice charging high-voltage box (100), characterized in that: The two-choice charging high-voltage box (100) is provided with an interlock control (110), a sleep wake-up (120), a charging signal control part (130) and a charging DC high-voltage control part (140) inside, one end of the interlock control (110) is electrically connected to a +24V power supply, the other end of the interlock control (110) is electrically connected to a GND ground wire, the interlock control (110) is connected to the sleep wake-up (120), and the interlock control (110) is used for circuit switch control, one end of the interlock control (110) and the sleep wake-up (120) is connected to the charging signal control part (130), and the charging signal control part (130) is used to control the charging signal, and one end of the charging signal control part (130) is connected to the vehicle through a charging low-voltage signal. A vehicle high-voltage power distribution box (200), wherein the vehicle high-voltage power distribution box (200) is connected to a charging DC high-voltage control part (140) via a charging DC+ voltage line / charging DC- voltage line, and the charging DC high-voltage control part (140) is used to control the charging high voltage, one end of the charging signal control part (130) is connected to a No. 1 gun via a No. 1 gun charging low-voltage signal, one end of the charging signal control part (130) is connected to a No. 2 gun via a No. 2 gun charging low-voltage signal, the No. 1 gun is connected to the charging DC high-voltage control part (140) via a left charging DC+ (141) and a left charging DC- (143), and the No. 2 gun is connected to the charging DC high-voltage control part (140) via a right charging DC+ (142) and a right charging DC- (144); The interlock control (110) includes a K1 relay normally closed end (111), a K1 relay (112), a K2 relay normally closed end (113), a K2 relay (114), a right charging port hatch proximity switch (115), a left charging port hatch proximity switch (116), a K1 relay normally open end (117), and a K2 relay normally open end (118); the K1 relay normally closed end (111), the K2 relay (114), the right charging port hatch proximity switch (115) are connected in parallel with the K1 relay (112), the K2 relay normally closed end (113), and the left charging port hatch proximity switch (116), to form a parallel circuit; The charging low voltage signal includes LCK+electronic lock signal, LCK-electronic lock signal, FB+electronic lock feedback signal, FB-electronic lock feedback signal, PT1+temperature sensor signal, PT1-temperature sensor signal, PT2+temperature sensor signal, PT2-temperature sensor signal, PP charging connection signal, CP charging connection signal; The charging signal control part (130) is composed of a K11 relay, a K12 relay, a K13 relay, a K14 relay, and a K15 relay. The normally closed ends of the K11 relay, the K12 relay, the K13 relay, the K14 relay, and the K15 relay are connected to the BMS of the two-choice charging high-voltage box (100). The K11 relay, the K12 relay, the K13 relay, the K14 relay, and the K15 relay are connected to the charging low-voltage signal. The charging DC high voltage control part (140) is composed of a first KM1 high voltage contactor, a first KM2 high voltage contactor, a first KM3 high voltage contactor, a first KM4 high voltage contactor, a controller, a second KM1 high voltage contactor, a second KM2 high voltage contactor, a second KM3 high voltage contactor, and a second KM4 high voltage contactor, wherein one end of the first KM1 high voltage contactor and the first KM2 high voltage contactor are connected in parallel and connected to the charging DC+ high voltage line, and one end of the first KM3 high voltage contactor and the first KM4 high voltage contactor are connected in parallel and connected to the charging DC- high voltage line; One end of the first KM1 high-voltage contactor is connected to the left charging DC+ (141), one end of the first KM2 high-voltage contactor is connected to the right charging DC+ (142), one end of the first KM3 high-voltage contactor is connected to the left charging DC- (143), and one end of the first KM4 high-voltage contactor is connected to the right charging DC- (144); The controller is provided with a D1 diode, a D2 diode, a D3 diode, and a D4 diode respectively, and one end of the second KM1 high-voltage contactor, the second KM2 high-voltage contactor, the second KM3 high-voltage contactor, and the second KM4 high-voltage contactor are connected in parallel and connected to the GND ground wire; The D1 diode is connected to the second KM1 high-voltage contactor, the D2 diode is connected to the second KM2 high-voltage contactor, the D3 diode is connected to the second KM3 high-voltage contactor, and the D4 diode is connected to the second KM4 high-voltage contactor.

2. According to claim 1, an electric bus dual-gun two-choice charging adapter box is characterized in that: The normally closed end (111) of the K1 relay, the K2 relay (114) and the right charging port hatch proximity switch (115) are connected in series, and the K1 relay (112), the normally closed end (113) of the K2 relay and the left charging port hatch proximity switch (116) are connected in series.

3. The electric bus dual-gun two-choice charging adapter box according to claim 1 is characterized in that: One end of the parallel circuit is connected to a +24V power supply, the other end of the parallel circuit is connected to a GND ground line, and one end of the parallel circuit is connected to the IN-end in the sleep wakeup (120).

4. The electric bus dual-gun two-choice charging adapter box according to claim 1 is characterized in that: One end of the parallel circuit is connected to the normally open end (117) of the K1 relay and the normally open end (118) of the K2 relay, the normally open end (117) of the K1 relay is connected in parallel with the normally open end (118) of the K2 relay, one end of the normally open end (117) of the K1 relay and the normally open end (118) of the K2 relay is connected to the IN+ end in the sleep / wake-up (120), and the other end of the normally open end (117) of the K1 relay and the normally open end (118) of the K2 relay is connected to the EN end in the sleep / wake-up (120).

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