Voltage collecting circuit for monomer batteries of battery pack

A single battery, voltage acquisition technology, applied in the direction of measuring current/voltage, measuring electricity, measuring electrical variables, etc., can solve the problems of high cost, low precision, complex circuit, etc., and achieve the effect of high real-time performance and long service life

Inactive Publication Date: 2012-04-25
镇江恒驰科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a low-cost, simple, practical and safe vehicle power battery single cell voltage acquisition circuit to solve the problems of low precision, complicated circuit, high cost and real-time performance in existing methods

Method used

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  • Voltage collecting circuit for monomer batteries of battery pack
  • Voltage collecting circuit for monomer batteries of battery pack
  • Voltage collecting circuit for monomer batteries of battery pack

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Embodiment Construction

[0022] as attached image 3 , 4 , 5, the following describes the implementation of the present invention by taking the collection of 20 single cells as an example. This embodiment is applicable to both nickel-hydrogen and lithium battery detection.

[0023] The battery voltage inspection circuit of the present invention is shown in image 3, this circuit is mainly composed of 11 two-way solid-state relay AQW214 chips and connections numbered IC1 to IC11. And only need to provide 21 solid state relay channels, each channel is connected to the electrode of the battery through a current limiting resistor and a connection line, a total of 20 batteries need to be selected, so there are 21 samples numbered R22 to R42 Current-limiting resistors, one end of the 21 current-limiting resistors from R22 to R42 are respectively connected to the 21 electrodes of Polar (1) to Polar (21) of the battery pack, and the other ends are respectively connected to the 8th pin and the 6th pin of IC...

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Abstract

The invention relates to a voltage collecting circuit for monomer batteries of a battery pack. After voltages of the monomer batteries of the power battery pack are isolated and sampled by employing a solid-state relay, a signal conditioning and isolating circuit and a microcontroller in a matching manner, the voltages are fed into an A/D (Analog-to-Digital) passage of the microcontroller for analog-to-digital conversion; the microcontroller is used for rapidly controlling two paths of solid-state relays connected with two electrodes of any monomer battery to operate at the same moment, thus, a terminal voltage of the corresponding monomer battery can be obtained on a sampling bus; simultaneously, as for electrical security, a terminal voltage signal, obtained from the battery pack, of the monomer battery needs to be isolated by an isolation amplifier, then can be input to the A/D passage of the microcontroller; and the process above is suitable for the voltage collecting circuit for the monomer batteries of the power battery pack. The circuit is low in cost, simple and practical, as well as safe and reliable.

Description

technical field [0001] The invention relates to the field of battery management systems, in particular to a single battery voltage acquisition circuit. Background technique [0002] The new situation of global energy and environment is urging countries around the world to accelerate the strategic transformation of transportation energy. New energy vehicles are gradually becoming the direction of future automobile development. As the main power source or auxiliary power source of new energy vehicles, batteries are currently restricting new One of the main factors in the development of energy vehicles. Due to the relatively high current cost of power batteries, as a vehicle power source, the mileage is limited and the service life is very limited, which seriously affects the promotion of new energy batteries. Therefore, on the basis of the existing battery technology, through the scientific management of the battery, the life of the battery can be extended, the cost of use ca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/36G01R19/00
Inventor 张育华曾洁孙金虎
Owner 镇江恒驰科技有限公司
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