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Cell balancing system and method

A technology for battery cells and battery packs, which is applied in the direction of batteries, secondary batteries, electrical components, etc., and can solve the problems of power dissipation loss and increased weight of battery packs, etc.

Inactive Publication Date: 2013-06-05
GM GLOBAL TECH OPERATIONS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The circuitry of some cell balancing techniques can add significant weight to the battery pack, which can be disadvantageous when the battery pack is intended to be incorporated into a portable device or vehicle
Implementation of some methods of cell balancing can result in significant dissipative losses of electrical energy

Method used

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  • Cell balancing system and method
  • Cell balancing system and method
  • Cell balancing system and method

Examples

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Embodiment Construction

[0055] In the following detailed description, various specific details are set forth in order to provide a thorough understanding of embodiments of the invention. However, it will be understood by those skilled in the art that embodiments of the invention may be practiced without these specific details. In other instances, well-known methods, procedures, components and circuits have not been described in detail so as not to obscure the present invention.

[0056] Unless specifically stated otherwise, it will be clear from the following discussion that throughout this specification references to terms such as "process", "calculate", "store", "determine", "evaluate", "measure", "provide", " Discussion of terms such as "transfer" and the like refer to the actions and / or processes of a computer or computing system or similar electronic computing device that manipulate data represented as physical (e.g. electronic) quantities within the registers and / or memory of the computing syst...

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PUM

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Abstract

A system and method may identifying an overcharged cell from among a plurality of cells of a battery pack. An undercharged cell may be identified from among any of the plurality of cells of the battery pack. A switch may be operated to connect the overcharged cell to the undercharged cell via a direct current (DC)-DC converter. The DC-DC converter may be operated to transfer charge from the overcharged cell to the undercharged cell.

Description

technical field [0001] The invention relates to a method for cell balancing of batteries, eg for electric vehicles. Background technique [0002] Rechargeable batteries are designed to provide electrical power to systems such as electric or hybrid vehicles. When the electrical energy stored in the battery is fully or partially consumed, the battery can be recharged by suitable charging means, for example by connection to the grid or by a generator on board the vehicle and driven by a vehicle component. A typical rechargeable battery includes an array of electrical power cells in the form of a battery pack. Typically, the individual cells of a battery pack may differ slightly from each other in their properties. During charging or providing power, different cells of the battery pack may charge or discharge at different rates. Such differences in charge or discharge rates may result in cell-to-cell variations in the state of charge (SOC) of the cells, as represented by, for...

Claims

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Application Information

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IPC IPC(8): H02J7/00
CPCY02E60/12H01M2220/20B60L11/1866B60L11/005H02J7/00B60L1/02Y02T10/7005H01M10/44Y02T10/7061B60L2240/547B60L11/1862Y02T10/7044Y02T10/7216B60L11/18B60L2210/10Y02T10/7077B60L1/003B60L11/14B60L2240/80B60L2240/549B60L11/1859Y02T10/7022H02J7/0019B60L2240/545H01M10/441B60L50/16B60L50/40B60L58/13B60L58/14B60L58/15B60L58/22H02J2310/48Y02E60/10Y02T10/70Y02T10/7072Y02T10/72Y02T10/92
Inventor X.唐L.郝X.毛J-S.陈
Owner GM GLOBAL TECH OPERATIONS LLC