Battery management system

A battery management system and battery module technology, applied in battery circuit devices, secondary battery repair/maintenance, current collectors, etc., can solve the problems of monitoring balance failure, poor heat dissipation conditions, and unfavorable optimal control of hybrid electric vehicles, etc. To meet the test needs, the structure is safe and reliable

Inactive Publication Date: 2011-05-18
深圳市佳华利道新技术开发有限公司
View PDF3 Cites 69 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] (3) In the existing system, the sensor whose range meets the maximum charging and discharging current of the battery pack is used, resulting in inaccurate measurement data when the battery pack is charged and discharged with a small current, which cannot meet the requirements for accurate estimation of the system on chip (SOC), which is not conducive to hybrid vehicles optimal control of
[0006] (iv) In the existing system, the balance mode of resistance discharge type is adopted, and the ba

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Battery management system
  • Battery management system
  • Battery management system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0026] First, the hardware structure of the power battery management system of the specific embodiment of the present invention is described:

[0027] Such as figure 1 As shown, the power battery management system includes: a master controller 1 , independent N (maximum N is 14) slave controllers 3 and independent N (maximum N is 14) battery equalizers 4 . Each slave controller 3 corresponds to a battery equalizer 4 and monitors a battery module 5 , and the slave controller 3 controls whether the corresponding battery equalizer 4 works. Both the slave controller 3 and the battery equalizer 4 have independent interfaces (solid line thick arrows, hollow arrows in the figure) to connect with the corresponding battery module 5. When the battery equalizer 4 is working, through its independent interface (the solid line thick arrow) balances the charge and discharge of each series-connected single battery in the corresponding battery module 5, and the slave controller 3 monitors the...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention relates to a battery management system which comprises a main controller (1) connected with an internal CAN bus (2) and more than one slave controller (3), wherein each slave controller is connected with a corresponding battery module (5) and a corresponding battery equalizer (4) pairwise; the main controller is also connected with an external CAN bus (6), and both the internal CAN bus and the external CAN bus comprise respective independent CAN communication modules. Furthermore, in the battery management system, the slave controllers and the battery equalizers are provided with independent interfaces connected with the battery modules, an independent AD sampling chip in each slave controller adopts an isolated DC-DC power supply, the communication between the independent AD sampling chips and a microprocessor is isolated by an optical coupler, the main controller monitors the current of a battery pack by using a double-range Hall current sensor. Thus, the structure of the management system is safe and reliable, interference among the AD sampling chip, the microprocessor and the battery equalizer is avoided, and the test requirement of current measurement under two different conditions is met.

Description

technical field [0001] The present invention relates to batteries and battery management, in particular to a battery management system especially applied to vehicle power management. Background technique [0002] The battery management system is the key to the application of power batteries and the development of the new energy vehicle industry. In electric vehicles, electric bicycles and electric motorcycles, the battery management system is responsible for collecting the data of the single cells (voltage, current and temperature) in the battery pack, estimating the working status of the battery pack, balancing the power of the single cells between the battery packs, Implement thermal management, battery system fault diagnosis and alarm, etc., and perform data communication with other components or systems on the vehicle. However, the existing battery management system has the following defects or deficiencies: [0003] (1) The safety requirements of the battery managemen...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): H01M10/42H02J7/00
CPCY02E60/12Y02E60/10
Inventor 刘洋成洛志宏韦凯
Owner 深圳市佳华利道新技术开发有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap