阅读说明：本技术 一种电动汽车电池管理系统电磁兼容测试系统 (Electromagnetic compatibility testing system of electric automobile battery management system ) 是由 叶尚斌 谢鸣 王永珠 郑远冬 张中元 刘素利 于 2020-07-31 设计创作，主要内容包括：本发明提出一种电动汽车电池管理系统电磁兼容测试系统,该方案可以在同一种布置下满足电动汽车电池管理系统主、分控制板组成系统共同进行电磁兼容测试的需求。该电动汽车电池管理系统电磁兼容测试系统,包括：暗室；放置在所述暗室外的上位机；待测设备,其放置在所述暗室内布置的绝缘板上；放置在所述暗室内的金属平面上的负载与输入模拟器,其与所述待测设备连接；放置在所述暗室内的金属平面上的供电装置,其与所述待测设备连接；放置在所述暗室外的CAN数据流传输装置,所述CAN数据流传输装置分别连接所述待测设备和上位机。(The invention provides an electromagnetic compatibility test system of an electric vehicle battery management system, which can meet the requirement of carrying out electromagnetic compatibility test on a main control board and a sub-control board combined system of the electric vehicle battery management system under the same arrangement. This electric automobile battery management system electromagnetic compatibility test system includes: a darkroom; the upper computer is placed outside the darkroom; the equipment to be tested is placed on an insulating plate arranged in the darkroom; the load and input simulator is placed on the metal plane in the darkroom and is connected with the equipment to be tested; the power supply device is placed on the metal plane in the darkroom and is connected with the equipment to be tested; and the CAN data stream transmission device is placed outside the darkroom and is respectively connected with the equipment to be tested and the upper computer.)

1. The utility model provides an electric automobile battery management system electromagnetic compatibility test system which characterized in that includes:

a darkroom (15);

an upper computer (9) placed outside the darkroom (15);

a device under test placed on an insulating plate (13) arranged within the darkroom (15);

a load and input simulator (7) placed on a metal plane (14) inside the darkroom (15), connected to the device under test;

a power supply device placed on a metal plane (14) in the darkroom (15) and connected with the equipment to be tested;

and the CAN data stream transmission device is placed outside the darkroom (15) and is respectively connected with the equipment to be tested and the upper computer (9).

2. System according to claim 1, characterized in that said insulating plate (13) is a plate made of insulating material with a thickness of 50mm, said insulating plate (13) being placed on a metal plane (14) inside a dark room (15).

3. The system of claim 1, wherein the device under test comprises: the battery management system main control board (1) and the at least one battery management system sub-control board are placed on the insulating board (13); the power supply device includes: a 12V power supply (4) and a battery pack (8) placed on the metal plane (14) of the dark room (15);

a low-voltage artificial network (5) and a 50-ohm nominal impedance (6) are connected between the 12V power supply (4) and the battery management system main control board (1); the low-voltage artificial network (5) and the 50-ohm nominal impedance (6) are placed on the metal plane (14) of the darkroom (15);

the battery pack (8) is connected with the battery management system sub-control board;

when the number of the battery management system sub-control boards is two or more, the battery management system sub-control boards are connected with each other in pairs through wiring harnesses.

4. The system of claim 3 wherein the CAN data stream transmission means comprises:

with CAN instrument (10) that host computer (9) are connected, and with optic fibre converter (11) that CAN instrument (10) are connected, CAN instrument (10) with optic fibre converter (11) are arranged outside darkroom (15), optic fibre converter (11) are connected power management system master control board (1).

5. The system according to claim 3, wherein the battery management system main control board (1) and each battery management system sub-control board are arranged in parallel, and a specific distance is provided between the battery management system main control board (1) and the battery management system sub-control board adjacent to the battery management system main control board and between two adjacent battery management system sub-control boards.

6. The system according to claim 3, characterized in that the battery management system main control board (1) of the device under test is connected to the grounding point (12) on the metal plane (14) of the dark room (15) by a grounding harness.

Technical Field

The invention relates to the field of electromagnetic compatibility testing of an electric automobile battery management system, in particular to an electromagnetic compatibility testing system of an electric automobile battery management system.

Background

The battery management system assembly is a unique part of the electric automobile, is mainly used for battery pack data acquisition, communication and strategy execution, and generally comprises a main control board and a plurality of sub-control boards. The traditional electromagnetic compatibility test of the battery management system adopts a mode that a main control board and a sub-control board are separately and independently tested, and has the defects of repeated test items, increased test period and cost, and incapability of simulating the real connection condition of a system formed by connecting the main control board and the sub-control board in a battery assembly by a low-voltage wire harness, so that the electromagnetic emission data of the test is greatly different from the actual condition of the whole vehicle. It is therefore desirable to formulate a reasonable electromagnetic compatibility test arrangement for the battery management system as a whole.

Disclosure of Invention

In order to solve the problems, the invention provides an electromagnetic compatibility test system for an electric vehicle battery management system, and the scheme can meet the requirement that the main control board and the sub-control board of the electric vehicle battery management system jointly perform electromagnetic compatibility test under the same arrangement.

The invention provides an electromagnetic compatibility test system of an electric vehicle battery management system, which comprises:

a darkroom;

an upper computer arranged outside the darkroom;

the equipment to be tested is placed on an insulating plate arranged in the darkroom;

the load and input simulator is placed on the metal plane in the darkroom and is connected with the equipment to be tested;

the power supply device is placed on the metal plane in the darkroom and is connected with the equipment to be tested;

and the CAN data stream transmission device is placed outside the darkroom and is respectively connected with the equipment to be tested and the upper computer.

Preferably, the insulating plate is a plate made of an insulating material with a thickness of 50mm, and is placed on a metal plane in the dark room.

Preferably, the device under test comprises: the battery management system main control board and the at least one battery management system sub-control board are arranged on the insulating board; the power supply device includes: a 12V power supply and battery pack placed on the metal plane of the dark room;

a low-voltage artificial network and a 50-ohm nominal impedance are connected between the 12V power supply and the main control board of the battery management system; the low voltage artificial network) and the 50 ohm nominal impedance are placed on the metal plane of the darkroom;

the battery pack is connected with the battery management system sub-control board;

when the number of the battery management system sub-control boards is two or more, the battery management system sub-control boards are connected with each other in pairs through wiring harnesses.

Preferably, the CAN data stream transmission apparatus includes:

the CAN tool is connected with the upper computer, the optical fiber converter is connected with the CAN tool, the CAN tool and the optical fiber converter are arranged outside the darkroom, and the optical fiber converter is connected with the power management system main control panel.

Preferably, the battery management system main control board and each battery management system sub-control board are arranged in parallel, and a specific distance is reserved between the battery management system main control board and the battery management system sub-control board adjacent to the battery management system main control board as well as between two adjacent battery management system sub-control boards.

Preferably, the main control board of the power management system of the device to be tested is connected with the grounding point on the metal plane of the darkroom through a grounding wire harness.

The invention is suitable for the electromagnetic compatibility test of the battery management system of the electric automobile, and by adopting the scheme, the main control board and the sub-control boards of the battery management system can be simultaneously tested by single arrangement, so that the arrangement and adjustment process can be effectively reduced and simplified, the test time and the resource occupation are reduced, the test cost is obviously reduced, the test working condition is closer to the actual condition in the battery assembly of the electric automobile, and the low-cost and high-efficiency electromagnetic compatibility interference characteristic investigation is realized.

Drawings

FIG. 1 is a schematic diagram of an electromagnetic compatibility testing system for a battery management system of an electric vehicle according to an embodiment of the present invention;

description of reference numerals: 1-a battery management system main control board; 2-the first battery management system divides the control panel; 3-the second battery management system divides the control panel; 4-12V power supply; 5-low voltage artificial network; a nominal impedance of 6-50 ohms; 7-battery management system load and input simulator; 8-a battery pack; 9-an upper computer; 10-CAN tool; 11-a fiber optic converter; 12-a ground point; 13-an insulating plate; 14-metal plane; 15-dark room.

Detailed Description

Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention can be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

Referring to fig. 1, the invention provides an electromagnetic compatibility testing system for a battery management system of an electric vehicle, comprising: the system comprises a battery management system serving as an electrical measuring device, a 12V power supply 4, a low-voltage artificial network 5, a 50-ohm nominal impedance 6, a load and input simulator 7 of the battery management system, a battery pack 8, an upper computer 9, a CAN tool 10, an optical fiber converter 11, a grounding point 12, a 50 mm-thick insulating material 13, a metal plane 14 and a darkroom 15. The battery management system specifically includes: the battery management system comprises a battery management system main control board 1, a first battery management system sub-control board 2 and a second battery management system sub-control board 3.

The battery management system comprises a main control panel battery management system main control panel 1 and two sub control panels (a first battery management system sub control panel 2 and a second battery management system sub control panel 3), wherein the main control panel and the two sub control panels are used as test objects of the scheme, namely equipment to be tested, and the equipment to be tested is placed on an insulating plate 13 arranged on a metal plane 14 in a darkroom 15.

The battery management system main control board 1 is supplied with power by a 12V power supply 4 as one of power supply devices, the 12V power supply 4 and the battery management system main control board 1 are connected through a power supply wire bundle, the length of the power supply wire bundle is 1700mm, the length of the power supply wire bundle is subjected to standardization matching through two groups of low-voltage artificial networks 5 arranged in parallel and 50-ohm nominal impedances 6, and the 12V power supply 4, the low-voltage artificial networks 5 and the 50-ohm nominal impedances 6 are respectively placed on a metal plane 14 in a darkroom 15. The low voltage artificial network 5 is used to provide a standard nominal port impedance and filter out the interference of the power supply terminals. The 50 ohm nominal impedance 6 is used to provide a nominal impedance for the low voltage artificial network 5.

The loads and inputs required for the battery management system main control board 1 and the first and second battery management system sub-control boards 2 and 3 are provided by a load and input simulator 7 connected through a 1700mm length harness. The load and input simulator 7 is used for providing a simulation input signal and load matching for the battery management system main control board 1 and the first battery management system sub-control board 2 and the second battery management system sub-control board 3. Two branch control panels are arranged at the same side of the main control panel (namely, the battery management system main control panel 1, the first battery management system branch control panel 2 and the second battery management system branch control panel 3 are arranged in parallel), and three control panels are not less than 100mm apart (namely, the battery management system main control panel 1 and the first battery management system branch control panel adjacent to the battery management system main control panel as well as the first battery management system branch control panel and the second battery management system branch control panel are all provided with specific distances).

The communication among the battery management system main control board, the first battery management system sub-control board 2 and the second battery management system sub-control board 3 is connected by a 3400mm long wire harness arranged in a 'U' shape.

The first battery management system sub-control board 2 and the second battery management system sub-control board 3 are connected to the battery pack 8 with 1700mm length wire harnesses, respectively. The battery pack 8 is used for supplying power to the two sub control panels and providing sub control panel temperature and voltage acquisition objects.

The battery management system main control board 1 transmits data stream by using the CAN port, and is connected to the upper computer 9 for recording through the optical fiber converter 11 and the CAN tool 10. The upper computer 9, the CAN tool 10 and the optical fiber converter 11 are used for monitoring data streams sent by the battery management system by using the CAN.

The battery management system main control board 1 is connected to a grounding point 12 through a grounding harness, and the grounding point 12 is used for providing reliable grounding for the battery management system main control board 1.

The three control panels and the corresponding connecting wire harnesses are all placed on an insulating plate 13 with the thickness of 50mm, the insulating plate 13 is placed on a metal plane 14, other loads and power supplies are placed on the metal plane 14, the whole test is carried out in a darkroom 15, the metal plane 14 is used for providing a ground reference point, the insulating plate 13 with the thickness of 50mm is used for providing insulating support with standard requirements for equipment to be tested and the wire harnesses, and the darkroom 15 is used for providing a test environment with a low electromagnetic background.

Further, the arrangement method can be compatible with the condition of more sub-control boards of the battery management system, if the sub-control boards of the battery management system are more than 2 sub-control boards, all the sub-control boards can be arranged on the same side in parallel according to the arrangement, the distance between the control boards is not less than 100mm, and the distance between the connecting wire harnesses is not less than 100 mm.

The arrangement of the system is suitable for the electromagnetic compatibility test of the battery management system of the electric automobile, the main control board and the sub-control board of the battery management system can be simultaneously tested by single arrangement by adopting the scheme, the arrangement and adjustment process can be effectively reduced and simplified, the test time and the resource occupation are reduced, the test cost is obviously reduced, the test working condition is closer to the actual condition in the battery assembly of the electric automobile, and the low-cost and high-efficiency electromagnetic compatibility interference characteristic investigation is realized.

In the present invention, after the system is built, the specific steps of performing the electromagnetic compatibility test are the means recorded in the prior art, and are not described in detail in this example.