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Method and device for calibrating temperature acquisition channel in battery management system

A battery management system and channel technology, which is applied in the field of calibrating a temperature acquisition channel in a battery management system, can solve the problems of difficult adjustment, time-consuming and laborious, limited resolution of sliding rheostats, etc., and achieve the effect of high calibration accuracy

Active Publication Date: 2018-04-03
BEIJING ELECTRIC VEHICLE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] The shortcoming of the method for calibrating the temperature acquisition channel in the above-mentioned prior art is: since a set of BMS includes multiple BMUs, one BMU has multiple temperature acquisition channels, and each channel needs to set multiple A temperature calibration point, the existing method of pure manual operation is quite a lot of work, time-consuming and laborious;
[0011] The resolution of the sliding rheostat is limited, and the change is not absolutely linear. It is difficult to adjust some resistance values, and the final output of the sliding rheostat is There is a deviation between the resistance and the desired set resistance value

Method used

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  • Method and device for calibrating temperature acquisition channel in battery management system
  • Method and device for calibrating temperature acquisition channel in battery management system
  • Method and device for calibrating temperature acquisition channel in battery management system

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Embodiment 1

[0067] The purpose of the embodiment of the present invention is to design an automatic calibration method to realize the automatic calibration of the BMU temperature acquisition channel. This embodiment provides a schematic diagram of the implementation principle of a method for calibrating the temperature acquisition channel in the battery management system. figure 2 As shown, the implementation system of this method is composed of a controller, an adapter board, a temperature adjustment board and a BMU. The controller is used to control the calibration process, and the adapter board is used for data communication between the controller, the temperature adjustment board and the BMU. The adjustment board receives the command sent by the controller to control the programmable resistor network, and the BMU receives the current analog resistance value sent by the controller, and collects and records the collected voltage value.

[0068] This embodiment provides a processing flo...

Embodiment 2

[0094] This embodiment provides a device for calibrating the temperature acquisition channel in the battery management system, and its specific implementation structure is as follows Figure 5 As shown, specifically, the following modules may be included: a controller 51 , an adapter board 52 , a temperature adjustment board 53 and a battery management system 54 .

[0095] The controller 51 is configured to send a temperature calibration instruction carrying the current calibration channel identifier and the set resistance value corresponding to the temperature calibration point to the adapter board;

[0096] The adapter board 52 is used to forward the temperature calibration instruction to the battery management system and the temperature adjustment board respectively;

[0097] The temperature adjustment board 53 is used to realize the set resistance value through a programmable resistor, and transmit the set resistance value to the current calibration channel in the battery ...

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Abstract

Embodiments of the present invention provide a method and device for calibrating a temperature acquisition channel in a battery management system. The method includes: the controller sends a temperature calibration instruction carrying the current calibration channel identifier and the set resistance value corresponding to the temperature calibration point to the adapter board, and the adapter board forwards the temperature calibration instruction to the battery management system and the temperature adjustment board respectively; The adjustment board realizes setting the resistance value through the programmable resistance, and transmits the setting resistance value to the current calibration channel in the battery management system; the battery management system collects the voltage value of the current calibration channel, and sends the current calibration channel identification, setting resistance value and Voltage values ​​are stored associatively. The embodiment of the present invention uses the controller and the programmable resistance network to automatically calibrate the multi-channel temperature sensors through software control, and the process does not require manual operation; the calibration accuracy is high, which is much higher than the NTC accuracy, and can fully meet the BMU temperature acquisition channel. calibration requirements.

Description

technical field [0001] The invention relates to the technical field of battery management, in particular to a method and device for calibrating a temperature acquisition channel in a battery management system. Background technique [0002] BMS (BATTERY MANAGEMENT SYSTEM, battery management system) mostly detects battery temperature through NTC (Negative Temperature Coefficient, negative temperature coefficient) thermistor, and this function is usually realized by multiple BMUs. BMUs are mostly hand-crafted in samples and small batches. At this stage, the manufacturing process is often not finalized. Due to the consistency of circuit board manufacturing process, component procurement and PCB (Printed Circuit Board, printed circuit board) placement process For reasons such as these, the deviation of each temperature acquisition channel is relatively large, which seriously affects the temperature-related fault diagnosis functions such as over-temperature protection and battery ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01K15/00
Inventor 张骞慧秦兴权郭志强
Owner BEIJING ELECTRIC VEHICLE
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