Passenger car charging boosting device

Abstract

The invention belongs to the technical field of automobile equipment, and particularly relates to a passenger car charging boosting device which comprises a charging pile and a power system, and a passenger car charging boosting mechanism is arranged between the charging pile and the power system. The passenger car charging boosting mechanism comprises a first EMC filter, the first EMC filter is connected with the charging pile, the DC / DC converter is connected with the first EMC filter, the second EMC filter is connected with the DC / DC converter, and the second EMC filter is further connected with a power system. According to the invention, the passenger car charging boosting mechanism is additionally arranged between the charging pile and the power system, so that the power system of the domestic passenger car does not need to be changed when the domestic passenger car meets the charging requirement of the charging pile in Japan, and the domestic passenger car, the passenger car exported from Europe, Japan and the like can share a set of power battery system with the same voltage platform.

Description

Technical Field

[0001] The invention relates to the technical field of automobile equipment, and in particular to a charging and voltage boosting device for a passenger car. Background Art

[0002] With the rapid development of the global electric vehicle industry, various countries are accelerating the construction of electric vehicle charging piles. However, the current charging voltage standards of various countries are different, which to a certain extent affects the convenience of electric vehicle charging. For example, the voltage used in Japan's electric vehicle DC charging piles is 0V-500V standard, while the voltage requirement for domestic electric buses is 700-1000V. Based on the above, in order to meet the charging needs of Japanese charging piles for domestic buses, a bus charging boost device is installed in the domestic bus charging system. Summary of the invention

[0003] In view of the above problems and / or the problems existing in the existing bus charging and boosting device, the present invention is proposed.

[0004] Therefore, the object of the present invention is to provide a bus charging and boosting device that can solve the above-mentioned existing problems.

[0005] To solve the above technical problems, according to one aspect of the present invention, the present invention provides the following technical solutions:

[0006] A bus charging and voltage boosting device, comprising a charging pile and a power system, wherein a bus charging and voltage boosting mechanism is arranged between the charging pile and the power system;

[0007] The passenger car charging boost mechanism comprises:

[0008] A first EMC filter, wherein the first EMC filter is connected to the charging pile;

[0009] A DC / DC converter connected to the first EMC filter;

[0010] A second EMC filter is connected to the DC / DC converter, and the second EMC filter is also connected to a power system.

[0011] As a preferred solution of the bus charging boost device described in the present invention, an input main positive contactor K1 is provided on the positive line between the first EMC filter and the DC / DC converter, and an input main negative contactor K2 is provided on the negative line between the first EMC filter and the DC / DC converter.

[0012] As a preferred solution of the bus charging boost device described in the present invention, the input main positive contactor K1 is set to 800V / 250A, and the input main negative contactor K2 is set to 800V / 250A.

[0013] As a preferred solution of the bus charging boost device described in the present invention, a DCDC input current sampling A1 is provided on the positive line between the input main positive contactor K1 and the DC / DC converter, and a DCDC output current sampling A2 is provided on the positive line between the DC / DC converter and the second EMC filter.

[0014] As a preferred solution of the bus charging boost device described in the present invention, wherein: the positive line between the first EMC filter and the input main positive contactor K1 and the negative line between the first EMC filter and the input main negative contactor K2 are both provided with a charging pile voltage sampling V1, the positive line between the input main positive contactor K1 and the DC / DC converter and the negative line between the input main negative contactor K2 and the DC / DC converter are both provided with a DCDC input voltage sampling V2, and the positive line between the DC / DC converter and the DCDC output current sampling A2 and the negative line between the DC / DC converter and the second EMC filter are both provided with a DCDC output voltage sampling V3.

[0015] As a preferred solution of the bus charging boost device described in the present invention, an input side capacitor C1 is provided between the positive line between the input main positive contactor K1 and the DC / DC converter and the negative line between the input main negative contactor K2 and the DC / DC converter, and an output side capacitor C2 is provided between the positive line and the negative line between the DC / DC converter and the DCDC output voltage sampling V3.

[0016] As a preferred solution of the bus charging and boosting device described in the present invention, the input side capacitor C1 is set to 24uF / 1000Vdc, and the output side capacitor C2 is set to 88uF / 900Vdc.

[0017] As a preferred solution of the bus charging boost device described in the present invention, the DC / DC converter is also connected to a control board, the control board is connected to a third EMC filter, and the third EMC filter is connected to a charging communication module, a BMS, a BDU and an IACU-all-in-one.

[0018] Compared with existing technologies:

[0019] The present invention installs a bus charging boost mechanism between the charging pile and the power system, thereby enabling domestic buses to meet the charging requirements of Japan's charging piles without changing the power system of domestic buses, thereby enabling domestic buses and buses exported to Europe, Japan, etc. to share a power battery system with the same voltage platform. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is the main topology diagram and high voltage power distribution diagram of the present invention;

[0021] Figure 2 This is a schematic diagram of the charging signal control and power distribution part of the present invention. DETAILED DESCRIPTION

[0022] 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.

[0023] The present invention provides a bus charging boost device, please refer to Figure 1-Figure 2 , including a charging pile and a power system, a bus charging boost mechanism is provided between the charging pile and the power system;

[0024] The bus charging boost mechanism includes: a first EMC filter, which is connected to the charging pile; a DC / DC converter, which is connected to the first EMC filter; a second EMC filter, which is connected to the DC / DC converter, and the second EMC filter is also connected to the power system; wherein the EMC filter is an EMC Filter.

[0025] An input main positive contactor K1 is provided on the positive line between the first EMC filter and the DC / DC converter, and an input main negative contactor K2 is provided on the negative line between the first EMC filter and the DC / DC converter. The input main positive contactor K1 is set to 800V / 250A, and the input main negative contactor K2 is set to 800V / 250A.

[0026] A DCDC input current sampling A1 is provided on the positive line between the input main positive contactor K1 and the DC / DC converter, and a DCDC output current sampling A2 is provided on the positive line between the DC / DC converter and the second EMC filter.

[0027] The positive line between the first EMC filter and the input main positive contactor K1 and the negative line between the first EMC filter and the input main negative contactor K2 are both provided with a charging pile voltage sampling V1, the positive line between the input main positive contactor K1 and the DC / DC converter and the negative line between the input main negative contactor K2 and the DC / DC converter are both provided with a DCDC input voltage sampling V2, and the positive line between the DC / DC converter and the DCDC output current sampling A2 and the negative line between the DC / DC converter and the second EMC filter are both provided with a DCDC output voltage sampling V3.

[0028] An input side capacitor C1 is provided between the positive line between the input main positive contactor K1 and the DC / DC converter and the negative line between the input main negative contactor K2 and the DC / DC converter, and an output side capacitor C2 is provided between the positive line and the negative line between the DC / DC converter and the DCDC output voltage sampling V3. The input side capacitor C1 is set to 24uF / 1000Vdc, and the output side capacitor C2 is set to 88uF / 900Vdc.

[0029] The DC / DC converter is also connected to a control board, which is connected to a third EMC filter, which is connected to a charging communication module, a BMS, a BDU and an IACU-all-in-one; wherein the control board is a Control Board; the charging communication module is an EVCC; the charging pile is an EVSE; in addition, BDU and BMS refer to a battery disconnection unit and a battery management system in the circuit, respectively; BDU is a battery disconnection unit, whose main task is to control the opening and closing of the current and the direction of flow to ensure the safety of the battery voltage; BMS is a battery management system, which is used to monitor and manage the working status of the battery pack of an electric vehicle.

[0030] Based on the above, the present invention includes but is not limited to the following embodiments:

[0031] The purpose of this implementation is to use the input voltage of 0-500V of the charging pile in Japan to increase the voltage to 350V-820V through the booster device to meet the charging voltage requirements of the vehicle power battery; the specific steps are as follows:

[0032] When charging, connect the Japanese charging pile. At this time, the charging communication module EVCC exchanges information with the charging pile and judges the charging conditions. According to the timing, it first requests the BMS system to close the charging isolation contactor, and then commands the four-in-one to close the pre-charge and main contactors in sequence according to the feedback status, and connect the DCDC output end to the high voltage of the battery system. Then, according to the charging timing, EVCC commands the multi-in-one to close K1 and K2, connect the DCDC voltage input end and the charging socket, and wait for the charging pile to output the voltage. Next, EVCC issues a command to start the boost DCDC according to the charging timing to charge the battery system. If any abnormality occurs during the charging process, the charging pile will stop outputting first, and then EVCC will first command DCDC to stop running. After obtaining the state that DCDC has stopped, it will disconnect the contactor at the DCDC input end and the contactor at the output end in turn, and then request BMS to disconnect the charging isolation contactor and send a fault message to the bus. As for the capacitor or isolation transformer inside the DCDC, it is the same as the principle of a general DCDC booster.

[0033] 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. A bus charging boosting device, comprising a charging pile and a power system, characterized in that: A bus charging boost mechanism is provided between the charging pile and the power system; The passenger car charging boost mechanism comprises: A first EMC filter, wherein the first EMC filter is connected to the charging pile; A DC / DC converter connected to the first EMC filter; A second EMC filter is connected to the DC / DC converter, and the second EMC filter is also connected to a power system.

2. A bus charging and voltage boosting device according to claim 1, characterized in that: An input main positive contactor K1 is provided on the positive line between the first EMC filter and the DC / DC converter, and an input main negative contactor K2 is provided on the negative line between the first EMC filter and the DC / DC converter.

3. A bus charging and voltage boosting device according to claim 2, characterized in that: The input main positive contactor K1 is set to 800V / 250A, and the input main negative contactor K2 is set to 800V / 250A.

4. A bus charging and voltage boosting device according to claim 2, characterized in that: A DCDC input current sampling A1 is provided on the positive line between the input main positive contactor K1 and the DC / DC converter, and a DCDC output current sampling A2 is provided on the positive line between the DC / DC converter and the second EMC filter.

5. A bus charging and voltage boosting device according to claim 4, characterized in that: The positive line between the first EMC filter and the input main positive contactor K1 and the negative line between the first EMC filter and the input main negative contactor K2 are both provided with a charging pile voltage sampling V1, the positive line between the input main positive contactor K1 and the DC / DC converter and the negative line between the input main negative contactor K2 and the DC / DC converter are both provided with a DCDC input voltage sampling V2, and the positive line between the DC / DC converter and the DCDC output current sampling A2 and the negative line between the DC / DC converter and the second EMC filter are both provided with a DCDC output voltage sampling V3.

6. A bus charging and voltage boosting device according to claim 5, characterized in that: An input side capacitor C1 is provided between the positive line between the input main positive contactor K1 and the DC / DC converter and the negative line between the input main negative contactor K2 and the DC / DC converter, and an output side capacitor C2 is provided between the positive line and the negative line between the DC / DC converter and the DCDC output voltage sampling V3.

7. A bus charging and voltage boosting device according to claim 6, characterized in that: The input side capacitor C1 is set to 24uF / 1000Vdc, and the output side capacitor C2 is set to 88uF / 900Vdc.

8. A bus charging and voltage boosting device according to claim 1, characterized in that: The DC / DC converter is also connected to a control board, the control board is connected to a third EMC filter, and the third EMC filter is connected to a charging communication module, a BMS, a BDU and an IACU-all-in-one.

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