Sub-board identification module and number processing method of battery management system (BMS)

A technology of battery management system and daughter board, which is applied in the direction of measuring electricity, measuring electrical variables, testing electrical devices in transportation, etc.

CN109270369AActive Publication Date: 2019-01-25BEIJING ELECTRIC VEHICLE
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2019-01-25

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Abstract

The invention discloses a sub-board identification module and a number processing method of a battery management system (BMS). The identification module includes a main board and at least two sub-boards connected in series. One end of the main board is connected with a head sub-board, and the other end is connected with a tail sub-board. The sub-boards include switches, first sampling circuits andsecond sampling circuits. First ends of the switches are connected with the first sampling circuits. The other ends of the first sampling circuits are connected with the main circuit. Second ends ofthe switches are grounded. Third ends of the switches are connected with a direct-current power source. The second sampling circuits are connected with a first sampling circuit of the first sub-boardand a first sampling circuit of a second sub-board. A target sub-board switch is in a second closed state in which a first sampling circuit is connected with the direct-current power source, and the other sub-board board switches are in a first closed state in which first sampling circuits are grounded. Voltage of a connection end of the main board and the head sub-board is the same as preset voltage corresponding to target sub-board identification information. According to the method, accurate determination of numbers of the sub-boards is facilitated, and convenience is provided for subsequent mass production debugging and testing, problem locating and program updating.
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Description

Technical field

[0001] The present invention relates to the technical field of batteries, and in particular to a sub-board identification module and a number processing method of a battery management system. Background technique

[0002] With the popularization of electric vehicles, users have higher and higher demand for the driving range of electric vehicles. In order to meet the demand for driving range, the number of strings in the battery pack is also increasing, so the number of collected voltage strings for the Battery Management System (BMS) is also increasing. Since the integrated BMS cannot meet the above requirements, the distributed BMS is more and more widely used. The main functions of the distributed BMS main board include: total voltage acquisition, total current acquisition, temperature acquisition, Controller Area Network communication, wake-up BMS signal, relay drive, insulation detection, etc. The main function of the daughter board is single Collection of b...

Examples

Embodiment Construction

[0045] Hereinafter, exemplary embodiments of the present invention will be described in more detail with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0046] Such as figure 1 As shown, the embodiment of the present invention provides a sub-board identification module of a battery management system, including a main board 1 and at least two sub-boards 2 connected in series through a main circuit.

[0047] One end of the main board 1 is connected to the first sub-board 21 at the first end of the at least two sub-boards 2 connected in series, and the other end is con...