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Parallel lithium battery pack single battery current high precision synchronous acquisition experimental device

A technology of high-precision synchronization and lithium battery packs, which is applied in the direction of measuring devices, measuring electricity, and measuring electrical variables, etc., can solve the problems of inability to collect current with high-precision synchronization, achieve low connection impedance, improve accuracy, and ensure internal resistance characteristics Effect

Inactive Publication Date: 2019-03-29
SHANDONG UNIV OF SCI & TECH
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Problems solved by technology

[0005] The purpose of the present invention is to provide a high-precision synchronous acquisition experimental device for the current of each single lithium battery in a parallel lithium battery pack to solve the problem that the current detection device cannot realize high-precision synchronous acquisition of the current of each single lithium battery in the parallel lithium battery pack question

Method used

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  • Parallel lithium battery pack single battery current high precision synchronous acquisition experimental device
  • Parallel lithium battery pack single battery current high precision synchronous acquisition experimental device
  • Parallel lithium battery pack single battery current high precision synchronous acquisition experimental device

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Embodiment Construction

[0030] Such as figure 1 As shown, this embodiment provides an experimental device for high-precision synchronous acquisition of single cell current of a parallel lithium battery pack, including a parallel lithium battery pack, a current synchronous acquisition unit, a microprocessor control unit, and a host computer data analysis and storage unit.

[0031] Such as figure 2 , image 3 As shown, a plurality of 18650-type single lithium batteries 1 are connected in parallel in the parallel lithium battery pack, the positive pole of each single lithium battery 1 is connected to the positive pole of the charger and the positive pole of the load, and the negative pole of each single lithium battery 1 is connected to the positive pole of the load. Connect the negative pole of the charger and the negative pole of the load.

[0032]A battery connector is provided on each single lithium battery 1 . The battery connector includes a wiring board 5 , buckles 9 , positive nickel sheet 3...

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Abstract

The invention provides a parallel lithium battery pack single battery current high precision synchronous acquisition experimental device, which belongs to the technical field of lithium battery detection experiments. The parallel lithium battery pack single battery current high precision synchronous acquisition experimental device comprises a parallel lithium battery pack, a current synchronous acquisition unit, a microprocessor control unit and a host computer data analysis storage unit. The device provided by the invention has the advantages that high-accuracy synchronous acquisition is carried out on the current of each single lithium battery in the parallel lithium battery pack; a battery connector thereof realizes low connection impedance to the single lithium batteries, which ensuresthe original internal resistance characteristic of each single lithium battery in the parallel battery pack and improves the current acquisition accuracy of the single lithium batteries; and after the current of each single lithium battery is collected and monitored, an adjustable internal resistance interface and an adjustable connection internal resistance interface are connected with constantan wires of different length and radius to equivalently adjust the equivalent internal resistance of each single lithium battery and equivalently adjust the connection resistance of the single lithiumbatteries in parallel connection.

Description

technical field [0001] The invention relates to the technical field of lithium battery detection experiments, in particular to an experimental device for high-precision synchronous collection of single battery currents of parallel lithium battery packs. Background technique [0002] With the intensification of energy crisis and environmental pollution, transportation energy transformation is imperative. Electric vehicles using green and environmentally friendly secondary batteries as power sources can effectively reduce road emissions, and are highly valued by domestic and foreign automobile research institutions and manufacturers, with broad market prospects. The power battery system is the core technology of electric vehicles, and the imperfection of the system seriously restricts the battery life and safety of electric vehicles. Lithium batteries have the advantages of high safety and high energy density, and are widely used in the field of electric vehicles. [0003] I...

Claims

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Application Information

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IPC IPC(8): G01R19/25G01R31/396
CPCG01R19/25
Inventor 常龙王宇于志豪肖林京沈潇陈龙
Owner SHANDONG UNIV OF SCI & TECH
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