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Battery cell tab monitor and method

A battery unit and tab technology, applied in the direction of circuit monitoring/indicating, current collectors, electrical components, etc., can solve the problem of circuit loss monitoring a single unit

Active Publication Date: 2016-04-06
TEXAS INSTR INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When a tab becomes disconnected from a battery cell, the circuit loses the ability to monitor an individual cell

Method used

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  • Battery cell tab monitor and method
  • Battery cell tab monitor and method
  • Battery cell tab monitor and method

Examples

Experimental program
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Embodiment Construction

[0012] figure 1 An exemplary embodiment circuit 100 is shown. The circuit 100 includes a conductive element 105 electrically connected to a first battery cell 110 and a second battery cell 115 . Conductive element 105 is electrically connected to sensing circuit 120 . The sensing circuit 120 includes a pull-down current source 125 connected to pull current from the conductive element 105 . The sensing circuit 120 also includes a pull-up current source 130 connected to drive current into the conductive element 105 .

[0013] Although both pull-down current source 125 and pull-up current source 130 may operate with only one current source, in a different approach each of pull-down current source 125 and pull-up current source 130 may comprise multiple independently controllable Battery. exist figure 1 In an example, the pull-down current source 125 includes a first pull-down current source 127 and a second pull-down current source 129 . In this example, the pull-up current...

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Abstract

The invention relates to a battery cell tab monitoring device (100), comprising a conductive element (105) electrically connected between two battery cells (110, 115). The conductive element (105) is connected to a sensing circuit (120) including a pull-down current source (125) connected to pull current from the conductive element and / or a pull-up current source (130) connected to drive current into the conductive element . A voltage measurement circuit (150) is connected to sense the voltage during operation of the pull-down current source (125) and the pull-up current source (130) to be used to determine the state of the conductive element. For example, a voltage exceeding a certain fixed or variable threshold indicates that the conductive element (105) is bending or cracking, which may indicate damage to the conductive element. Voltages above other fixed or variable thresholds indicate a complete disconnection of the conductive element. When an imbalance is detected, current sources for pushing and pulling sense current may be used to bring the battery cells (110, 115) into balance.

Description

technical field [0001] The present invention relates generally to voltage measurement apparatus and methods, and more particularly, to apparatus and methods for monitoring battery cells in a battery pack. Background technique [0002] It is common to power electronic devices with battery packs comprising two or more battery cells. For example, two or more battery cells can be stacked together in series to generate higher voltages that power various electronic devices. The battery is monitored to provide the user of the activated device with information on the amount of energy remaining in the battery. In some applications, each cell of the battery pack is monitored because the voltage of each cell can drift too high or too low for a particular application, or a particular cell can stop functioning, affecting the battery pack's performance. overall performance. [0003] Circuits that monitor the cells in the battery pack monitor the voltage across each cell and the voltage...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J7/00G01R31/36H01M10/44
CPCG01R31/396H02J7/0014H02J7/0048
Inventor J·R·库珀W·张K·W·斯考特
Owner TEXAS INSTR INC
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