System for inspecting operation parameter of central/distributed electric vehicle battery set

A technology for battery packs and electric vehicles. It is applied in electric vehicles, measuring electricity, and electrical devices. It can solve the problems of long lead wires, increasing the difficulty and complexity of wiring, and damaging detection equipment, achieving high cost performance and enhancing flexibility. and expandability, the effect of increasing reliability

Inactive Publication Date: 2007-09-05
CHANGAN UNIV
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AI Technical Summary

Problems solved by technology

[0012] (1) Since the voltage signal of each cell of the battery pack needs to be introduced into the detection equipment, if the lead wire is short-circuited or damaged, it will directly affect the safety of the battery pack
[0013] (2) Since there are many voltage signal lines introduced into the testing equipment, and these signal lines must be completely connected to the testing equipment in accordance with the voltage sequence of the battery pack, otherwise the testing equipment will be damaged, thus increasing the difficulty and complexity of wiring
[0014] (3) Not applicable to the practical application of replacing the battery pack
[0015] (4) The lead wire is long, which is not only easy to introduce interference, but also directly affects the measurement accuracy because of the large wire resistance
[0026] (3) When there are many batteries, the number of modules is also large, which increases the cost and complexity, and requires the communication bus to have a higher load capacity

Method used

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  • System for inspecting operation parameter of central/distributed electric vehicle battery set
  • System for inspecting operation parameter of central/distributed electric vehicle battery set
  • System for inspecting operation parameter of central/distributed electric vehicle battery set

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Embodiment Construction

[0086] Referring to Figure 1, the working voltage of electric vehicle motors is relatively high, generally around 300V. The voltage of power lead-acid batteries is mostly 6V and 12V, and the voltage of lithium-ion batteries and nickel-metal hydride batteries is smaller (4V, 1.2V). Therefore, the number of batteries in the battery pack is relatively large. For example, if a 12V lead-acid battery is used to provide a driving voltage of 288V, 24 batteries are required. If each battery is equipped with a detection module, in addition to increasing the cost, the reliability of the system will also decrease. In addition, if the number increases, the capacity of the CAN bus will not be enough. Currently, the number of nodes allowed by the CAN bus is 110. For this reason, we propose the detection idea of ​​"local concentration" and "overall distribution", that is, all batteries are divided into several groups, each group uses a detection module for "centralized" detection, and the who...

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Abstract

A system used for detecting operation parameter of centralized / distributed storage battery set on motor-driven vehicle is prepared as forming said system by using CAN bus to connect a numbers of detection module with each other, modularizing and localizing detection unit as well as using bus to transmit data to from a centralized / distributed detection mode. The detecting method utilizing said system is also disclosed.

Description

1. Technical field: [0001] The invention relates to a storage battery pack detection system, in particular to a centralized / distributed electric vehicle storage battery pack working parameter detection system. 2. Background technology: [0002] An electric vehicle is a motor vehicle powered by a battery. During use, the driver needs to keep abreast of the working conditions of the battery pack, mainly including the remaining energy and working parameters (status) of the battery pack. [0003] The working parameters of the battery mainly refer to the terminal voltage, working current and temperature of the battery during the working process. Since electric vehicle battery packs are usually composed of dozens (hundreds) of single cells, whether the working parameters (state) of each single cell is normal or not not only reflects the performance of the battery pack, but also affects the performance of the battery pack. capacity and remaining energy. [0004] The power manage...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/36B60L3/00
Inventor 马建张卫钢蹇小平任贺宇钱定军穆丹
Owner CHANGAN UNIV
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