Double-wire daisy chain signal transmission system and transmission method for battery monitoring

A signal transmission system and battery monitoring technology, applied in electrical digital data processing, instruments, etc., can solve the problems of signal attenuation, large noise, inaccurate data transmission, etc., to reduce the degree of signal attenuation, reduce noise, and achieve AC coupling. Effect

Pending Publication Date: 2022-05-06
西安电子科技大学重庆集成电路创新研究院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In view of the above-mentioned prior art, when monitoring a large-capacity battery, a four-wire transmission method based on the SPI communication protocol is adopted. This transmission method will introduce a large amount of noise during transmission, which will attenuate the signal and cause inaccurate data transmission. The invention proposes a two-wire daisy chain signal transmission system and transmission method for battery monitoring

Method used

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  • Double-wire daisy chain signal transmission system and transmission method for battery monitoring
  • Double-wire daisy chain signal transmission system and transmission method for battery monitoring
  • Double-wire daisy chain signal transmission system and transmission method for battery monitoring

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Experimental program
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Embodiment 1

[0085] see figure 1 , the present embodiment is used for the two-wire daisy chain signal transmission system of battery monitoring, and it comprises microcontroller, main power management module, first-level sub-power management module and second-level sub-power management module, and level n is equal to 2; microcontroller It is electrically connected to the main power management module, and the main power management module, the first-level sub-power management module and the second-level sub-power management module are connected in series from bottom to top. When in use, the main power management module, the first-level sub-power management module and the The second-level sub-power management modules are correspondingly connected to a battery pack of a large-capacity lithium battery, and collect information such as voltage, current, and capacity of each battery pack.

[0086] The microcontroller is used to send data acquisition instructions to the main power management module...

Embodiment 2

[0091] see figure 2 , this embodiment is used for a two-wire daisy chain signal transmission system for battery monitoring. On the basis of Embodiment 1, the main power management module includes a main data master, a main editing / decoding module, a main high-side daisy chain interface and a main low-side Daisy chain interface, the main editing / decoding module includes the main editing / decoding module corresponding to the main high-side daisy chain interface and the main editing / decoding module corresponding to the main low-side daisy chain interface; the first-level sub-power management module includes sub-data master, sub-high-side The sub-encoding / decoding module corresponding to the daisy chain interface, the sub-encoding / decoding module corresponding to the sub-low side daisy chain interface, the sub-high side daisy chain interface and the sub-low side daisy chain interface, wherein the sub-encoding / decoding module includes The sub-encoding / decoding module corresponding ...

Embodiment 3

[0105] This embodiment is used for the two-wire daisy chain signal transmission system for battery monitoring. On the basis of Embodiment 2, its main encoding / decoding module and sub-encoding / decoding module include a chip selection enabling encoding / decoding module and a data encoding / decoding module. , the chip select enable encoding / decoding module is used to encode / decode the chip select enable signal in the data acquisition instruction and feedback data; the data encoding / decoding module is used to encode / decode the serial clock signal in the data acquisition instruction and feedback data Encode / decode with serial data signals.

[0106] Preferably, the main data master in this embodiment is also used to identify the data collection instruction and store the data; the sub-data master is also used to identify the data collection instruction and store the data.

[0107] Preferably, the microcontroller is also used to store and display summary data.

[0108] see image 3 , ...

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Abstract

The invention discloses a double-wire daisy chain signal transmission system and transmission method for battery monitoring, and belongs to the technical field of high-capacity battery monitoring, the system comprises a microcontroller, a main power supply management module and n stages of sub power supply management modules, and n is a natural number greater than or equal to 1; according to the invention, the data acquisition instruction is coded and integrated to combine the input three lines into one line, and the feedback data is coded and integrated to combine the output three lines into one line, so that the output communication channels are combined into one, and the input communication channels are combined into one. According to the invention, the generated coding signal cannot be kept in a single logic level for a long time, the coding signal continuously jumps during transmission, AC coupling is realized, the DC component in the signal is filtered out, the noise of signal transmission is reduced, the signal attenuation degree is reduced, and the accuracy of data transmission is ensured.

Description

technical field [0001] The invention belongs to the technical field of large-capacity battery monitoring, and relates to a signal transmission technology for multiple large-capacity battery monitoring, in particular to a two-wire daisy chain signal transmission system and a transmission method for battery monitoring. Background technique [0002] As the core device in the power management module, the battery monitoring module needs to communicate with the microcontroller, and send and receive instructions through the microcontroller, so as to realize the reading and processing of the collected information. At the same time, in order to meet the monitoring needs of large-capacity lithium-ion battery packs in various new energy applications, it is necessary to consider the connection between multiple power management modules and the connection between power management modules and microcontrollers in the design, and In this way, the number of channels of the battery pack to be ...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): G06F13/42
CPCG06F13/4247G06F13/426
Inventor朱光前张启东韩学婧刘婷婷杨银堂
Owner西安电子科技大学重庆集成电路创新研究院