Method and arrangement for balancing battery pack

A battery pack and balancing technology, applied in battery circuit devices, circuit devices, battery/fuel cell control devices, etc., to achieve the effect of efficient cell balance and improved balance state

Pending Publication Date: 2020-01-03
VOLVO LASTVAGNAR AB
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0014] Although the document JP 2010/008173 teaches a system for balancing the cells of a battery, there is a problem of the form of

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  • Method and arrangement for balancing battery pack
  • Method and arrangement for balancing battery pack
  • Method and arrangement for balancing battery pack

Examples

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[0034] Various embodiments of the present disclosure will be described more fully hereinafter with reference to the accompanying drawings. However, the methods and systems disclosed herein can be implemented in many different forms and should not be construed as limited to the aspects set forth herein.

[0035] first reference figure 1 , shows a simplified perspective view of a vehicle in the form of a bus 1 which, according to one embodiment, is of the electric type equipped with an electric motor 2 for operating the bus 1 . this is in figure 1 is shown schematically by the rear axle 3 connected to the electric motor 2 . The electric machine 2 works suitably as a combined generator-motor. Furthermore, the vehicle 1 may be in the form of any commercial vehicle, such as a truck or the like or an automobile.

[0036] The bus 1 carries an electrical energy storage system 4 comprising a battery pack 5 which will be described in more detail below and which comprises a plurality...

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Abstract

The invention relates to a method for balancing a battery pack (5) comprising a plurality of battery cells (5a, 5b, 5c) for an electric vehicle. The method comprises: determining the state of charge (SOC) for each of said battery cells (5a, 5b, 5c); receiving information related to the expected use of the electric vehicle to a prediction horizon; and determining a state of balance value (SOBc) atthe current time and an expected state of balance value (SOBp) at the end of the prediction horizon. Furthermore, the method comprises balancing the battery cells (5a, 5b, 5c) based on the state of balance value (SOBc) at the current time and the expected state of balance value (SOBp) at the end of said prediction horizon, such that the state of balance (SOB) and the use of the cell balancing process is optimized so as to minimize the energy usage of the battery pack (5). The invention also relates to an arrangement for balancing a battery pack (5).

Description

technical field [0001] The present invention relates to a method and apparatus for balancing batteries. [0002] The invention can find application in heavy vehicles such as buses, trucks and construction equipment as well as passenger cars. Although the invention will be described below in relation to a bus, the invention is not limited to this particular vehicle, but may be used in other vehicles as well. Background technique [0003] In the automotive field, research and development related to propulsion of vehicles using alternative power sources (ie, power sources used as replacements for traditional internal combustion engines) is increasing. It is known that internal combustion engines, such as gasoline engines or diesel engines, offer high efficiency with relatively low fuel consumption. However, environmental considerations have led to an increase in the development of greener vehicles, especially electric vehicles. [0004] Today, there are various types of vehi...

Claims

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Application Information

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IPC IPC(8): B60L58/22H02J7/00
CPCH02J7/0014B60L2240/549Y02T10/7072B60L53/32B60L58/22H02J2310/48Y02T10/70Y02T90/12B60L58/12B60L53/64B60L2240/547B60L2240/545B60L2200/18B60L2200/36B60L2200/40B60L2200/22B60Y2200/14B60Y2200/41B60Y2200/11B60Y2200/91Y02T90/14G01R31/392H02J7/0019
Inventor 埃斯特班·杰尔索
Owner VOLVO LASTVAGNAR AB
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