A battery management system for an electric vehicle and an electric vehicle

A technology of battery management system and electric vehicle, which is applied to electric vehicles, battery circuit devices, current collectors, etc., can solve the problems of long pulling of multiple sampling lines, reducing sampling accuracy, affecting the wiring of the whole vehicle, etc. The effect of strong performance, improved sampling accuracy, and simple vehicle layout

Active Publication Date: 2015-08-12
奇瑞新能源汽车股份有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Existing battery management systems generally adopt a centralized solution, that is, the main control board in the battery management system integrates many functional modules, for example, it integrates sampling modules for collecting voltage, current, insulation resistance, etc., because some sampling points It is far away from the main control board, so multiple sampling lines need to be pulled very long, which not only affects the wiring of the whole vehicle, but also reduces the accuracy of sampling, and it is also very inconvenient to maintain

Method used

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  • A battery management system for an electric vehicle and an electric vehicle
  • A battery management system for an electric vehicle and an electric vehicle
  • A battery management system for an electric vehicle and an electric vehicle

Examples

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Embodiment 1

[0053] This embodiment provides a battery management system for an electric vehicle, the electric vehicle includes a battery pack composed of multiple battery modules connected in series, a vehicle management system (VMS, Vehicle Management System) and a motor controller (MCU, Motor Control Unit), where each battery module includes multiple single cells, for example, each battery module consists of multiple single cells connected in series and parallel. Such as figure 1 As shown, the battery management system includes: a plurality of battery module sampling units, a high voltage sampling unit, an insulation sampling unit and a control unit; each battery module sampling unit corresponds to a battery module.

[0054] Wherein, the battery module sampling unit is used to measure the voltage of each single battery in the corresponding battery module in real time, and send the measured value to the control unit through the internal CAN network. The control unit is used for balancin...

Embodiment 2

[0084] The difference between this embodiment and embodiment 1 is:

[0085] Such as Figure 4 As shown, the battery module sampling unit also includes: a hardware monitoring subunit; the collection subunit is also used to collect the temperature values ​​of each single battery in the corresponding battery module in real time, and collect all the collected The temperature value and the voltage value are sent to the first processing subunit; the first processing subunit is also configured to send the temperature value and the voltage value collected by the collection subunit to the hardware monitoring subunit;

[0086]The hardware monitoring sub-unit is used to perform real-time redundant monitoring on the voltage value and temperature value of each single cell in the corresponding battery module collected by the collection sub-unit, so as to judge the voltage value of each single cell in the corresponding battery module Whether it is overcharged, overdischarged or overtemperat...

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Abstract

The invention provides a battery management system for an electronic vehicle. The battery management system comprises a plurality of battery module sampling units, a high-voltage sampling unit, an insulation sampling unit and a control unit, wherein the battery module sampling units are used for measuring the voltage of each battery cell in corresponding battery module of the battery module sampling units in real time, and sending to the control unit through interior CAN (Controller Area Network); the high-voltage sampling unit is used for measuring the high-voltage direct-current bus voltage and current of the battery cells and the voltage of fuse end in real time and sending to the control unit through the interior CAN network; the insulation sampling unit is used for measuring insulation resistors of the battery cells and total high-voltage components in real time and sending to the control unit through the interior CAN network; the control unit is used for carrying out balance management on the battery cells, carrying out fault diagnosis on a high-voltage contactor and a fuse of the electronic vehicle and carrying out on-off control on a high-voltage loop of the electronic vehicle, and monitoring the values of the insulation resistors of the battery cells and the total high-voltage components in real time. Correspondingly, the invention provides the electronic vehicle comprising the battery management system. The battery management system disclosed by the invention is high in sampling precision and convenient to maintain.

Description

technical field [0001] The invention relates to the technical field of electric vehicles, in particular to a battery management system applicable to electric vehicles and the electric vehicle. Background technique [0002] Fuel saving, reduction of greenhouse gas emissions and air quality purification are the three major challenges facing the automotive industry in the world today. In response to these challenges, major automobile companies are developing electric vehicles. Research and development of high-performance electric vehicles has become an inevitable trend in the development of the world's automobile industry. [0003] In electric vehicles, the power battery (that is, the battery pack formed by connecting multiple battery modules in series) is an important part of it. The performance of the power battery is very complicated, and the characteristics of different types of power batteries vary greatly. It is necessary to use a battery management system as the link be...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J7/00B60L11/18
CPCY02T10/7005Y02T10/70
Inventor 汪建建
Owner 奇瑞新能源汽车股份有限公司
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